Showing papers on "Screed published in 2017"

Measuring thermal conductivity and specific heat capacity values of inhomogeneous materials with a heat flow meter apparatus

Abstract: The aim of this study was to observe the suitability of the heat flow meter apparatus for thermal conductivity and specific heat capacity tests of concrete, as well as to determine specific heat capacity values for 14 different plasters. In total, two concrete types, five floor screed plasters, two fixing plasters, six wall screed plasters, and one specialized plaster that had small EPS spheres added into it were tested. The main novelty value of this research is studying how well heat flow meter apparatus can determine specific heat capacities of inhomogeneous materials. Also, how precisely thermal conductivity could be measured from small concrete specimens of interest. The results measured with the most suitable methods were in line with published values, which indicate that the apparatus was suitable for both tests.

Construction method of crack-resisting cement stabilized crushed stone base course

Abstract: The invention discloses a construction method of a crack-resisting cement stabilized crushed stone base course. The problems that at present, contraction fissures of a traditional cement stabilized crushed stone are many, the surface is prone to loosening after freeze-thaw, the defects of the construction mode exist in the construction side, and therefore large-area cracks and freeze-thaw are generated in the subsequent process of the road surface are solved. According to the key points of the technical scheme, the construction method comprises the following steps that (a), the crack-resisting cement stabilized crushed stone base course comprises a collected material, 3%-5% of cement and water, the curve of the screen hole size of the collected material and the passing percentage is in an S shape; (b), a mixture is mixed; (c), the mixture is conveyed; (d), the mixture is paved, specifically, square timber cushion blocks are put under a paver screed plate in advance, and mixture paving adopts two pavers to synchronously operate in an echelon formation mode; (e), the mixture is grinded; and (f), curing is conducted, specifically, a curing film or geotechnical cloth is covered to conduct hydrating curing, so that the surface of the cement stabilized course keeps a moist state all the time, and the cement stabilized crushed stone base course with the crack-resisting property being obviously improved is obtained.

Concrete screeding system with boom mounted screed head

Abstract: A concrete screeding device for screeding uncured concrete placed at a support surface includes a screed head having a grade setting device and a vibrating member, and an extendable and retractable boom. A base end of the boom is attached at a base structure and the screed head is supportable at a distal end of the boom. The boom is extendable so as to position the screed head at a distance of at least 20 feet from the base structure, and the screed head is movable between its extended location and the base structure to screed the concrete placed at the support surface.

Multi-rotational concrete screed apparatus for screeding concrete

Abstract: A multi-rotational concrete screed to produce a level finished surface that includes a frame assembly, a boom assembly secured to the frame assembly at a first end and to a screed head at a second end, and a drive assembly. A powered turntable is positioned between the frame assembly and drive assembly permitting complete rotation of each with respect to the other.

Paving machine for applying varying crown profiles

Abstract: A paving machine is disclosed. The paving machine may have a screed assembly having a left screed section and a right screed section. The paving machine may also have a crown actuator configured to pivot the left and right screed sections about the centerline. The paving machine may have a crown profile sensor configured to detect the crown profile (DP), and a cross slope sensor configured to detect a cross slope (QNL*, QNR*) of the screed assembly. Further, the paving machine may have a controller configured to determine the crown profile (DP) and a cross slope (QNL*, QNR*) of the screed assembly. The controller may calculate a left cross slope (QNL) of the left screed section and a right cross slope (QNR) of the right screed section based on the determined crown profile (DP) and the determined cross slope (QNL*, QNR*), and display the crown profile on the display device.

Paving machine with projector as navigation aid

Abstract: The invention relates to a paving machine (1) comprising a material bunker (2) for receiving a construction material (M), a chassis (3), an operator stand (6) which is arranged behind the material bunker (2) when seen in the construction direction (F), a paving screed (7) which can be leveled for assembling the construction material (M) onto a substrate (U), a material conveying unit (8) which is configured to transport the construction material (M) from the material bunker (2) to the paving screed (7), and at least one optical projector (9) which is configured to generate at least one projection (10) in the visible spectrum on the substrate (U) laterally and/or in front of the chassis (3) of the paving machine (1) when seen in the construction direction (F). The projection (10) is visible to an operator of the paving machine (1) from the operator stand (6) when seen in the construction direction (F).

Finisher Apparatus and Method for Multi-layer Compaction

Abstract: The present invention relates to a multi-layer compaction finisher apparatus and a multi-layer compaction method. The multi-layer compaction finisher apparatus comprises: a drive unit to perform a movement; a hopper unit to accommodate concrete; a discharge unit to pour accommodated concrete; and a screed having a vibrator to compact a surface of poured concrete. The multi-layer compaction finisher apparatus forms a pavement; a lower layer compaction unit is disposed on a rear of the discharge unit; a compaction surface of a lower portion of the lower layer compaction unit is positioned below a compaction surface of the screed; a height of the lower layer compaction unit is adjusted by a height adjustment unit; an attachable compaction unit is selectively coupled to both ends in a width direction to flexibly adjust a length in a width direction; a side compaction unit is disposed on a side of the finisher apparatus; the side compaction unit is formed to allow a form panel to adjust an angle around a hinge unit to flexibly adjust an inclination of a side of the pavement; and the vibrator is included to perform vibration compaction. Accordingly, a lack of compaction is able to be overcome to secure a uniform aggregate distribution regardless of a thickness of the pavement.

Road paver with asphalt fume risk reduction system

Abstract: A road paver comprises a screed assembly for laying a mat of paving material, and a tank for storing a coolant. The road paver further comprises a nebulizer device configured to receive the coolant from the tank and to nebulize the coolant into a coolant fog in an environment of the road paver. By cooling the environment of the road paver, the amount of harmful fumes emitted by hot paving material can be substantially reduced.

Paving screed with fastening device for a heating element

Abstract: A paving screed for a road paver that comprises a screed plate, a heating element and a fastening device for pressing the heating element onto the screed plate. The fastening device comprises an actuating member and an elastic element. The actuating member is configured to deflect through its operation the elastic element directly or indirectly by a predetermined amount, wherein the elastic element applies a predetermined force directly or indirectly onto the heating element and biases the heating element against the screed plate.

Vented stop bead apparatus, vented weep screed apparatus, and related systems and methods thereof

Abstract: A vented stop bead and a vented weep screed are used to vent a stucco or plaster wall. The vented stop bead has a base panel with a stop bead wall extending from the base panel at a first location and a spacing member wall extending from the base panel at a second location, wherein a spacing member is connected to the spacing member wall. A vented portion is positioned between the stop bead wall and the spacing member wall, wherein the vented portion has a venting structure positioned through the base panel between the first and second locations. The vented weep screed has a nailing fin with a first leg extending therefrom at a first location. A second leg extends from the nailing fin at a second location, the second leg having at least one venting structure positioned through the second leg.

Asphalt concrete paver with oil temperature prompt facility

Abstract: The utility model discloses an asphalt concrete paver with oil temperature prompt facility, its structure include shielding plate, horizontal pole, rear -view mirror, thermometer, operation panel, steering wheel, seat, radiator, concrete paving owner's body, hopper, drag conveyer, push away roll, front wheel, vibrator, vibrator engine, oil tank, drive wheel, helical spreader, compacting plate, screed, engine, warning light, the shielding plate is connected with the horizontal pole, the thermometer comprises pointer, thermometer, thermometer main part, display screen, loudspeaker, inductor, alarm, the pointer is established inside the thermometer, the thermometer main part is equipped with the display screen, the utility model discloses being equipped with the thermometer, can knowing to show the gentle oil level that produces oil directly perceivedly, when exceeding the uniform temperature, the siren sounding has been avoided having improved work efficiency because of the oil tank lacks the problem that oil results in machine parts premature failure.

Apparatus and method for a screed extension control system

Abstract: A screed extension control system adapted for use on a screed assembly having a main screed, a main screed contact surface, a screed extension, and a screed extension contact surface. The screed extension control system comprises a slope actuator, a height actuator, at least one sensor, and a controller that is adapted to receive feedback from the at least one sensor. A virtual pivot point location is defined by a position where the main screed contact surface and the screed extension contact surface intersect. The controller causes at least one of the slope actuator and the height actuator to move between an extended position and a retracted position to control the position of the virtual pivot point location along the length of the main screed. A method for adjusting the screed extension position relative to the main screed.

System for heating a paving screed

Abstract: A system for controlling heating of a screed plate includes screed plate disposed along the paving material delivery path. A first temperature sensor is operative to monitor a screed plate temperature and a second temperature sensor along the paving material delivery path is operative to monitor an actual paving material temperature of a paving material being applied to a work surface. A controller is configured to determine an estimated paving material temperature adjacent the screed plate based upon the actual paving material temperature and operate a heater to maintain the screed plate temperature within a temperature variation range relative to the estimated paving material temperature.

Destructive and Non-Destructive Testing of an Industrial Screed Mortar Made with Lightweight Composite Aggregates WPLA

Abstract: Today, only a very small portion of plastic waste is recycled, while huge quantities remain untreated and are becoming increasingly worrying. The search for other alternatives is still an urgent necessity so that these wastes can be reduced to the maximum; their valorization may be the best solution. This study concerns a new technique for the valorization of polyethylene terephthalate (PET) plastic bottle wastes, in order to design a composite material, i.e. siliceous sand-PET, which then gives a Waste Plastic Lightweight Aggregate “WPLA”. Our hope is to provide solutions to specific and general applications in the field of construction. Some observations are noted on the effects of this composite on destructive and non-destructive testing, such as the physical properties and mechanical behaviors of an industrial composite screed, by substituting 0, 25, 50, 75 and 100% by weight of natural aggregate by this composite. Scanning electron microscope (SEM), FT-IR and X-ray diffraction analyses were used to better understand the cement hydration products of the composite mortars. Some possible uses of this screed, or even of the composite itself, can subsequently be recommended. Encouraging results were obtained regarding the usage of this composite aggregate as an eco-material in the field of construction for sustainable development. In addition, it provides environmental-friendly and cost-effective solutions in using recycled materials for concrete construction applications.

Road finishing machine with compacting message display unit

Abstract: The disclosure relates to a road finishing machine comprising a paving screed for the production of a new road pavement layer of a paving material and a unit provided on the road finishing machine to generate a dynamic compacting specification field based on thermographic geosignals with regard to at least one temperature image that exists behind the paving screed of the road finishing machine for at least one surface section of the newly installed road pavement layer. An information indication unit provided on the road finishing machine is configured to display at last one compacting message that is at least partially based on the compacting specification field to an operator of at least one compacting vehicle that follows behind the road finishing machine for compacting of the newly installed road pavement layer.

Machine, system and method for resurfacing existing roads

Abstract: A machine for resurface existing roads is disclosed. The machine may include a first group of sprayers configured to form a first layer of binding material, and a fiber material distribution component positioned adjacent the first group of sprayers. The fiber material distribution component may be configured to distribute fiber material onto the first layer of the binding material. The machine may also include a second group of sprayers positioned adjacent the fiber material distribution component. The second group of sprayers may be configured to form a second layer of the binding material over the distributed fiber material. Additionally, the machine may include a channel positioned adjacent the second group of sprayers. The channel may be configured to supply an asphalt mixture over the second layer of the binding material. Further, the machine may include a screed positioned adjacent the conduit, where the screed may be positioned to contact the asphalt mixture.

A waterproof construction for seashore utility tunnel

Abstract: The utility model discloses a waterproof construction for seashore utility tunnel, the base plate watertightness structure include the foundation ditch hole end from the supreme sand rock block cushion layer who lays in proper order, plain concrete bed course, cement mortar screed -coat, the wet waterproofing membrane of shop of self -adhesion polymer, microlith concrete protection layer, waterproof concrete structural floor and cement base permeate crystallization coating water proof coating down, the side wall waterproof construction includes the wet waterproofing membrane of shop of extruded polystyrene board protective layer, self -adhesion polymer, cement mortar screed -coat, waterproof concrete structure side wall and cement base infiltration crystallization coating water proof coating that the outside -in set gradually, the top board waterproof structure includes follows the basic crystallization coating water proof coating that permeates of the supreme waterproof concrete structural floor who sets gradually, cement mortar screed -coat, the wet waterproofing membrane of shop of self -adhesion polymer, microlith concrete protection layer, root resistance waterproof layer, plastic film isolation layer, microlith concrete protection layer and cement down Adopt this structure can improve the structural waterproof performance

Wall body waterproof insulation structure

Abstract: The utility model provides a wall body waterproof insulation structure all lays keeping apart with water that coiled material waterproof layer tried one's best building structure through roofing, wall body with on bearing down on one, strengthened waterproof performance, and the outside of roofing and wall body has been laid the heat preservation and has been strengthened thermal insulation performance. The utility model discloses a technical scheme below adopting realizes: cement mortar screed -coat, waterproof coating, heat preservation, cement mortar screed -coat, the waterproof enhancement layer of coiled material, coiled material waterproof layer, isolation layer, protective layer and finish coat have been laid on the roofing in proper order, set up flutedly on the wall body, cement mortar screed -coat, the waterproof enhancement layer of coiled material, coiled material waterproof layer and protective layer are laid in proper order to the wall body inboard between from the roofing to the recess, cement mortar screed -coat, the waterproof enhancement layer of coiled material and coiled material waterproof layer are laid in proper order to the lower part of recess, are equipped with metal pressing strip and pass through the fix with screw on waterproof enhancement layer of coiled material and the coiled material waterproof layer, coiled material waterproof layer is laid on the upper portion of recess, and coiled material waterproof layer is last to be equipped with metal pressing strip and through the fix with screw, just to seal with sealing material.

Floor heating device of high -efficient intelligence

Abstract: The utility model discloses a floor heating device of high -efficient intelligence, including load bearing wall and floor ground thermal insulation layer, be provided with the temperature controller on the load bearing wall, be connected with cold lead wire on the temperature controller, the right side on floor ground thermal insulation layer is provided with the aluminium foil layer, be provided with electric heating cable on the aluminium foil layer, and be equipped with temperature sensing probe on the aluminium foil layer, the right side on aluminium foil layer is provided with the steel wire stratum reticulare, the right side of steel wire stratum reticulare is provided with the basal layer, the right side of basal layer is equipped with the foaming and mixes dirt bed, the right side that the foaming mixed dirt bed is provided with the floor finish layer layer, the top on floor ground thermal insulation layer is equipped with fixed pipe strap, the center department of fixed pipe strap is provided with the ground heating coil, the top of ground heating coil is equipped with the screed -coat. Utility model's beneficial effect is: temperature controller and a plurality of temperature sensing probe be provided with, can just timing setting can be carry out by automatically regulated operating temperature, therefore the consumption of having practiced thrift the energy, and can improve work efficiency.

Can prevent ecological landscape barricade system architecture that exterior finish drops

Abstract: The utility model discloses a can prevent ecological landscape barricade system architecture that exterior finish drops, it is by the retaining wall structure body, planting soil layer and infiltration layer constitute, the retaining wall structure body is including the blotter, bottom plate basic unit and barricade brickwork, the dorsal part of barricade brickwork is equipped with the screed -coat I of plastering, the face side of barricade brickwork is equipped with the screed -coat II of plastering, cement mortar layer and finish coat, the planting soil layer includes the cement soil layer, it has the vegetation to plant on nutrition kind of soil layer and nutrition kind of the soil layer, infiltration layer oozes the metalling including straining, strain and ooze that the metalling is located on the rammed earth layer and extend to the top on planting soil layer, the beneficial effects are that: surface runoff water accessible infiltration layer filters that the back is collected by porous collector pipe and the drainage gets into the sump pit, the flow guide and drainage pipe is direct go into the peripheral municipal rainwater well of barricade with the surface runoff log raft in, avoided the surface runoff water direct from the infiltration of barricade brickwork, has solved the barricade brickwork and the problem that crack and exterior finish drop has appeared.

Shock attenuation full floating floor gives sound insulation

Abstract: The utility model discloses a shock attenuation full floating floor gives sound insulation, including floor base layer, floor base layer is the reinforced concrete layer, and closed setting has the rectangle cavity in the floor base layer, equidistantly in the rectangle cavity is provided with a plurality of and an arch floor rectangle cavity inner wall body coupling, and the opening of adjacent arch floor upwards with downwards sets up respectively, floor base layer is inside to be provided with outside steel framework, is provided with the floor steel framework who is connected with outside steel framework in the arch floor, the floor base layer up end sets gradually flexible rubber flotation layer, screed -coat, the cotton puigging of glass, foam insulation layer, water -proof film layer and floor decorative layer, the floor base layer upper end is provided with cladding screed -coat, the cotton puigging of glass, foam insulation layer, water -proof film layer and floor decorative layer encirclement sideboard all around, the utility model has the advantages of reasonable design, it is effectual to give sound insulation, reduces whole consumptive material, and reinforcing overall structure supports the performance, and the shock attenuation effect is showing.

Anhydrous with waterproof structure that has glass partition handing -over department between water

Abstract: Anhydrous with waterproof structure that has glass partition handing -over department between water, including reinforced concrete floor, reinforced concrete floor includes that anhydrous upper part of reinforced concrete floor and reinforced concrete floor have a low district between water, and anhydrous upper part of reinforced concrete floor and reinforced concrete floor have and set up the vertical rise edge between water between the low district, and reinforced concrete floor has between water the low upper portion of distinguishing install the screed -coat, the utility model discloses set up L shape stainless steel strip anhydrous and anhydrous joint part position, cut off mortar or concrete protective layer to and the infiltration on anhydrous ground, prevent effectively that the timber apron at gate position or carpet from weing, warping. The utility model discloses the U -shaped stainless steel, can be conveniently reinforced concrete floor have between water with direct mount toughened glass between anhydrous, can appear the stainless steel strip with L again and combine to form a parcel waterproof layer and screed -coat U -shaped region to prevent further that the moisture is by having to anhydrous infiltration between water.

Intelligence floor heating device for house

Abstract: The utility model discloses an intelligence floor heating device for house, including control box and floor finish layer layer, the bottom on floor finish layer layer is provided with concrete layer, and the internally mounted who goes up concrete layer has an electric heating cable, the below of going up concrete layer is fixed with down concrete layer, and concrete layer and last concrete layer's junction is provided with the wire net down, concrete layer has all set up sky slot with last concrete layer down, down concrete layer's internally mounted has the heat exchange tube, and the both ends of heat exchange tube are provided with water inlet and delivery port respectively, down concrete layer's bottom is provided with the heat preservation, and the below of heat preservation is equipped with the cement mortar screed -coat, the utility model discloses a heat exchange tube, delivery port and the water inlet that set up can carry out the excess heat that electric heating cable produced the intelligent use, also can realize the floor refrigeration in summer simultaneously to increase the function of its use, and then used energy -concerving and environment -protectively, satisfied the user demand.

Bituminous paving mixes shop's ware

Abstract: The utility model discloses a bituminous paving mixes shop's ware, including vehicle body support, be provided with the heater on vehicle body support, be provided with the hot plate in vehicle body support's bottom, the heater passes through hot -air pipes to be connected with the hot plate, is provided with at the rear of hot plate and mixes the jar, is provided with the scarify ware in the front portion of mixing the jar, is provided with the mechanism that paves at the rear of mixing the jar, pave the mechanism including first auger, first screed, second auger and the second screed laid in proper order from beginning to end, the place ahead of vehicle body support is provided with and connects the hopper, connect the hopper to pass through oblique material loading machine, the connection of falling glassware second auger The utility model discloses an add the hot plate, the middle part that spills in ridge is expected in addition to the bulk cargo part that can realize coming to wholly walk in front, puies forward the temperature again, be in the same place with the design of scarify ware through mixing the jar to connect the new material in the hopper to carry to the second auger through oblique material loading is quick -witted with the messenger of falling the glassware, thus it is applicable in adding shop and the whole situations that adopt the difference material of grade auxiliary tone

Freezer surpasses level land level ground

Abstract: The utility model discloses a freezer surpasses level land level ground, include: the concrete structure base plate, its characterized in that: the concrete structure base plate on be equipped with waterproof layer, heated board and concrete leveling layer in proper order, heated board and concrete leveling layer cover whole concrete structure base plate heated board and concrete leveling layer between be equipped with waterproof gas barrier membrane the concrete leveling layer surface be equipped with the feud and glue, this feud glue and concrete leveling layer between be equipped with the curing agent. The utility model discloses an adopt the structural style of screed -coat, waterproof air -insulation layer, heated board and sclerosis top layer, when the hardness and the roughness that make the terrace accorded with the operation requirement, the terrace had the waterproof effect of heat preservation simultaneously to it is the usability to have improved terrace in use, has reduced temperature loss and freezer to the produced pollution in all ring edge borders. The utility model discloses simple structure, construction are simple and convenient, and the surface has certain hardness and roughness requirement.

Method for controlling a road finishing machine with a wheel gear and road finishing machine with a wheel gear

Abstract: The disclosure relates to a method for controlling a road finishing machine with a material bunker for receiving paving material, a screed for compressing the paving material, a drivable rear wheel and a drivable front wheel. A rotational speed of the rear wheel of the road finishing machine is measured. Moreover, a travel speed of the road finishing machine is measured. A target driving torque of the front wheel of the road finishing machine is calculated based on the measured rotational speed of the rear wheel and the measured travel speed of the road finishing machine. Then, an actual driving torque of the front wheel is adjusted to the calculated target driving torque. The disclosure also relates to a road finishing machine.

Floor floor ground thermal insulation system that insulates against sound

Abstract: The utility model relates to a floor floor ground thermal insulation system that insulates against sound, a floor floor ground thermal insulation system that insulates against sound, including concrete floor, the concrete floor top is equipped with the screed -coat, the screed -coat top is equipped with heat -insulation and sound -insulation board, the heat -insulation and sound -insulation board top is equipped with the reinforced concrete layer, the reinforced concrete layer, be equipped with vertical sound insulation piece between heat -insulation and sound -insulation board and the wall body, heat -insulation and sound -insulation board is through phenolic resin foam, the mould pressing is once only produced, heat -insulation and sound -insulation board's upper surface is equipped with bloop orderly and regular spread, heat -insulation and sound -insulation board's lower surface covers and has the dual layer protection layer, adjacent heat -insulation and sound -insulation board pieces together the seam crossing and pastes and have waterproof tape, heat -insulation and sound -insulation board also pastes with vertical sound insulation piece junction has waterproof tape. Vertical sound insulation piece is cotton by the EPE pearl, and the expanded polyethylene material is made promptly, and vertical sound insulation piece single face is equipped with the viscose layer. The dual layer protection layer of heat -insulation and sound -insulation board lower surface is the non -woven fabrics of high strength and the glass fiber cloth of two -way muscles and bones in proper order. The utility model discloses under the condition of the intensity that does not influence heat preservation effect, heated board, noise cancelling effect has been strengthened.

Paver screed performance test testing platform

Abstract: The utility model discloses a paver screed performance test testing platform, including two pairs of stands, whenever be provided with two on every group crossbeam and can follow its gliding slider all being connected with a set of crossbeam between the stand, the downside of every group crossbeam all is equipped with the draft arm, and the one end of every draft arm is passed through leveling cylinder and is connected rather than a slider that corresponds on the crossbeam, and the middle part of every draft arm is passed through the lift cylinder and is connected rather than another slider that corresponds on the crossbeam, and the other end of every draft arm all is connected to the screed, is provided with the vibrator on the screed. The utility model discloses a camber of pairing vibration screed and the test of bottom surface plane degree, vibration working parameter and amplitude homogeneity, the working parameter that vibrates, stroke and synchronism etc.

Feeding device for pouring machine

Abstract: The utility model discloses a feeding device for pouring machine, including conveying pipeline and nozzle, the nozzle sets up the one end at the conveying pipeline, the nozzle passes through fixing bolt and is connected with the conveying pipeline, fixing bolt's outside is including rotary joint, the exit end of nozzle is connected with the screed, the baseplane and the jet exit end of screed are same horizontal plane, bottom one side of screed is equipped with the draw -in groove. In this way, the utility model relates to a feeding device for pouring machine who goes out, nozzle discharge gate department can carry out secondary heating to the sizing material that flows out, guarantee the quality of crack filling adhesive material, can press on limit stream thick liquid limit again, improves cementation of fissures efficiency, rotary joint can drive the rotation that the screed carries out arbitrary direction, and is applicable equally to anomalous crack and miniature net crack, adaptation different kinds of roads crack that the hierarchical design of conveying pipeline can be better, tails in the better processing conveying pipeline.

Wall ground floating screed instrument of making level

Abstract: The utility model provides a wall ground floating screed instrument of making level, including lead screw, recess, jack catch, base and connecting hole, the mid -mounting of lead screw in the inside of jack catch, the recess setting in the upper portion both sides of jack catch, base welding in the lower part of lead screw, connecting hole evenly distributed in the bottom of base, the diameter of lead screw be less than 50mm, through rotating the height that the lead screw can adjustment tool, be favorable to convenient operation, improve work efficiency The utility model discloses a height that the lead screw can adjustment tool is rotated in the setting of lead screw, is favorable to convenient operation, improves work efficiency, through the setting of base, convenient processing, the effectual processing cost that has reduced is favorable to reducing the cost of manufacture