Showing papers on "Pulley published in 2015"

Measurement of the cable-pulley Coulomb and viscous friction for a cable-driven surgical robotic system

Abstract: In this paper we present experimentally obtained cable-pulley Coulomb and viscous friction for cable-driven surgical robotic systems including the RAVEN II surgical robotic research platform. In the study of controlling cable-driven systems a simple mathematical model which does not capture physical behavior well is often employed. Even though control of such systems is achievable without an accurate model, fully understanding the behavior of the system will potentially realize more robust control. A surgical robot is one of the systems that often relies on cables as an actuation method as well as pulleys to guide them. Systems with such structure encounter frictional force related to conditions of cable and pulley such as cable velocity, tension, type and number of pulley, and angle of cable wrapping around pulley. Using a couple of test platforms that incorporate cable, pulleys, and other experimental conditions corresponding to the RAVEN II system, it is shown that cable-pulley friction is function of tension, wrap angle, and number of pulleys and not of magnitude of cable velocity.

Design, identification and experimental testing of a light-weight flexible-joint arm for aerial physical interaction

Abstract: In this paper we introduce the design of a light-weight novel flexible-joint arm for light-weight unmanned aerial vehicles (UAVs), which can be used both for safe physical interaction with the environment and it represents also a preliminary step in the direction of performing quick motions for tasks such as hammering or throwing. The actuator consists of an active pulley driven by a rotational servo motor, a passive pulley which is attached to a rigid link, and the elastic connections (springs) between these two pulleys. We identify the physical parameters of the system, and use an optimal control strategy to maximize its velocity by taking advantage of elastic components. The prototype can be extended to a light-weight variable stiffness actuator. The flexible-joint arm is applied on a quadrotor, to be used in aerial physical interaction tasks, which implies that the elastic components can also be used for stable interaction absorbing the interactive disturbances which might damage the flying system and its hardware. The design is validated through several experiments, and future developments are discussed in the paper.

Pulley friction compensation for winch-integrated cable force measurement and verification on a cable-driven parallel robot

Abstract: In a cable-driven parallel robot, elastic cables are used to manipulate the end effector within the workspace. Cable force measurement is necessary for several control algorithms like cable force control, contact control, or load identification. The cable force sensor can be placed directly at the connection point on the platform or somewhere along the cable using pulleys. The pulleys between the force sensor and the platform disturb the force measurement accuracy due to friction. This paper deals with modeling and compensation of the friction. The friction behavior in the drive train with focus on the effects of the pulleys is non-trivial, as the cable movement consists of microscopic and macroscopic movements and standstills. Friction models from Coulomb and Dahl are adapted to deal with the pulley friction. The experimental evaluation showed an improvement of 70% with respect to the uncompensated case.

Under-actuated prosthetic hand capable of reproducing hand grasping function

Abstract: The invention discloses an under-actuated prosthetic hand capable of reproducing a hand grasping function; the under-actuated prosthetic hand is provided with an interphalangeal drive mechanism and a thumb drive mechanism in a palm; finger bodies take pulleys as main parts, and transmission mechanisms arranged in fingers are sequentially and alternately wound on all the pulleys of the fingers by steel wire ropes; joints in the fingers are in flexible coupling by elastic components; the interphalangeal drive mechanism adopts two motors to drive four fingers and multiple degrees of freedom of the fingers in a synergetic way; a thumb body takes a pulley as a main part, the transmission mechanisms in the finger bodies take transmission ropes as transmission mediums, the interphalangeal drive mechanism adopts a gear component for transmission matching, and the four degrees of freedom of the thumb can be controlled by two motors. After the under-actuated prosthetic hand is adopted, self-adaptive grasping of various objects can be accurately completed, and the rich grasping operation function of a human hand can be reproduced; the under-actuated prosthetic hand has the characteristics of being compact in structure, smaller in size, lighter in weight, convenient to control, accurate in grasping action, and the like.

High temperature resistant friction resistant pulley material composition for two-dimension code knitting machine and pulley production method

Abstract: The invention discloses high temperature resistant friction resistant pulley material composition for a two-dimension code knitting machine and a pulley production method. The high temperature resistant friction resistant pulley material composition for the two-dimension code knitting machine comprises phenolic resin, polyvinyl chloride, epoxidized soybean oil, plasticizer, nanosized silica, nanometer aluminum oxide and nanometer titanium oxide; relative to 100 parts of phenolic resin by weight, the content of the polyvinyl chloride is 30 to 100 parts by weight, the content of the epoxidized soybean oil is 1 to 10 parts by weight, the content of the plasticizer is 1 to 5 parts by weight, the content of the nanosized silica is 1 to 10 parts by weight, the content of the nanometer aluminum oxide is 0.5 to 5 parts by weight, and the content of the nanometer titanium oxide is 1 to 10 parts by weight. Due to the above design, the produced pulley is good in high temperature resistant performance and friction resistant performance, and accordingly is good in service life when being applied to knitting of the two-dimension code knitting machine, increases the service life of the two-dimension code knitting machine and reduces production costs.

Working table roller device with automatically retractable rollers

Abstract: The invention discloses a working table roller device with automatically retractable rollers, and belongs to the field of mechanical equipment. The working table roller device with automatically retractable rollers comprises the rollers arranged at the bottom of a working table, wherein support columns with the same height are arranged in four corners of the bottom of the working table respectively; grooves are formed in the bottoms of the support columns; the rollers are arranged in the grooves; extension mechanisms are arranged between the rollers and the tops of the grooves, and extend to realize the sliding of sliding blocks in the grooves so as to realize the extension of pulleys; and the extension of the extension mechanisms is controlled through control buttons on the working table, so that the operation is simple, and the use is convenient.

Domestic garbage treatment device

Abstract: The utility model discloses a domestic garbage treatment device comprising a feed hopper, a fan, a communicating pipe, a heating tank, a cutting knife, a rotating shaft, a material guide inclined plate, a driven belt pulley, a belt, a crushing bin, a driving belt pulley, a cutting motor and a tank body, wherein the feed hopper is arranged at the upper end of the tank body, the fan is arranged on the left side of the feed hopper, the communicating pipe is arranged on the left side of the fan, the heating tank is arranged at the lower end of the communicating pipe, the crushing bin is arranged below the feed hopper, the rotating shaft is arranged in the crushing bin, the cutting knife is arranged on the rotating shaft, the driven belt pulley is arranged at the right end of the rotating shaft, the belt is arranged on the driven belt pulley, the upper end of the belt is connected with the driving belt pulley, the cutting motor is arranged at the left end of the driving belt pulley, and the material guide inclined plate is arranged at the lower end of the rotating shaft. According to the domestic garbage treatment device disclosed by the utility model, hot air in the heating tank is blown into the tank body by virtue of the fan so as to ensure that air in the device circulates; and in addition, the hot air can be used for removing moisture in the device, so that bacteria can be prevented from breeding in the device, and thus the safety of compressed materials can be ensured.

High-efficient environmental protection chinese chestnut drying-machine

Abstract: The utility model discloses a high-efficient environmental protection chinese chestnut drying-machine, including screen cloth conveyer belt, preheating chamber and drying chamber, both ends are equipped with belt pulley group about screen cloth conveyer belt downside, and the screen cloth conveyer belt passes preheating chamber and drying chamber, and the drying chamber is located the preheating chamber right side, has all covered the insulation material layer on preheating chamber and the drying chamber inner wall, and drying chamber middle section upside is equipped with the air-blower, and the air-blower downside passes through pipe connection electric heater unit, the main air-supply line of electric heater unit downside connection, the utility model discloses high-efficient environmental protection chinese chestnut drying-machine, adoption hot-air drying and high temperature heating are dried to the chinese chestnut, and it is effectual, efficient to dry to can collect and carry out prebake to the chinese chestnut the waste heat of stoving in-process, improve the efficiency of follow-up stoving, and can carry out hydrofuge and dust removal, further carrying have been done drying efficiency, has been protected the environment, and whole stoving process drives by the screen cloth conveyer belt, need not manual operation, has realized the serialization and the automation of stoving operation.

Functional trainer exercise machine

Abstract: An exercise machine has at least one hollow column rotationally mounted between upper and base members of a frame. A pulley carriage is mounted inside the column in engagement with an internal track for travel up and down the track, and a cable linked to an exercise resistance extends through the pulley carriage before terminating at a cable pull attachable to a selected user engagement accessory. A pulley cover pivoted to the carriage extends partially out of a column opening and extends over one or more pulleys mounted in the pulley carriage.

High-rise external wall remote control glass wiping device

Abstract: The invention discloses a high-rise external wall remote control glass wiping device which comprises scrubbing devices, a positioning device, a control device and a lifting device. The positioning device is arranged on a fixed rack, the scrubbing devices are arranged on a movable rack, the movable rack is in sliding connection with the fixed rack, the fixed rack is arranged on the external wall face and is connected with the lifting device through a pulley and a steel wire rope, the lifting device is arranged on a rood, the control device and a power supply are arranged on the lifting device, the control device is connected with a remote control device through a wireless receiving-transmitting device, the movable rack is connected with at least two scrubbing devices, and at least two wire sockets are formed in the fixed rack. Manual glass external wall cleaning is replaced by vertical movement of the movable rack and rotation of a cleaning disk, the high-rise external wall remote control glass wiping device is safely fixed through a suction disc and has remote control and automatic control functions, cleaning strength is ensured, labor intensity is reduced, and working efficiency is improved.

Automatic ampoule bottle opening device

Abstract: The invention relates to an automatic ampoule bottle opening device An ampoule clamping rotary platform is arranged at the bottom of the interior of a shell of the device, a sliding platform is arranged on the upper portion of the interior of the shell, a sterilization device, a scratch device and a scrap absorbing device which are capable of making linear movement horizontally are installed on the sliding platform, and a knocking device which is fixed in position is arranged at the left side of the interior of the shell; the ampoule clamping rotary platform comprises a lifting module, a rotating module and a clamping module; the sliding platform comprises guide rods, a screw rod, a nut, a motor and sliding seats, the motor drives the screw rod to rotate, and the sliding seat which is fixedly connected with the nut makes linear motion along the guide rods; the sterilization device comprises a sterilization support plate, a gauze circulation mechanism and an alcohol spraying mechanism; the scratch device comprises a scratch support plate, grinding wheels, synchronous belts, synchronous pulleys, a gear set and a motor; the scrap absorbing device comprises a negative pressure draft fan, a flexible pipe and an absorbing nozzle, and the absorbing nozzle is installed below the scratch support plate The device is reasonable and compact in structure, standard in operation, adjustable in power and capable of being compatible with ampoule bottles of all specifications on the market, by means of the device, glass particles are prevented from falling into the ampoule bottle to the maximum extent, and no environmental pollution is caused

Portable elliptical exercise machine

Abstract: An exercise apparatus having a pulley, a pair of stabilizing assemblies each configured to couple a front portion of a respective pedal element to each side of the pulley, a looped belt configured to couple the pulley to a resistance assembly, a tension stabilizer configured to maintain a tension of the looped belt on the pulley, and the resistance assembly configured to assert an adjustable resistance to the pedal elements through the looped belt, where the resistance is adjusted by changing a distance between a flywheel element and a corresponding magnetic plate element of the resistance assembly, the magnetic plate asserting a magnetic force over the distance on the flywheel element and the looped belt looping around a co-rotating extension from the flywheel element.

Intelligent sleep monitoring system for preventing kids from kicking quilts

Abstract: The invention provides an intelligent sleep monitoring system for preventing kids from kicking quilts, comprising a control assembly, magnetic sensors, stretching motors, drive pulleys, pull ropes, a humidity-sensitive resistor, a thermal-sensitive resistor, magnets, temperature sensors, and a remote alarm assembly. The humidity-sensitive resistor and the thermal-sensitive resistor are arranged on the obverse side of a bed body. The magnetic sensors and the stretching motors are arranged in the corners of the bed body. The control assembly is connected to the humidity-sensitive resistor, the thermal-sensitive resistor, the magnetic sensors and the stretching motors. A quilt is connected to the stretching motors through the pull ropes. The temperature sensors are arranged on the quilt, and the temperature sensors are connected with the control assembly in a wireless communication mode. The control assembly is connected with the remote alarm assembly in a wireless communication mode. The intelligent sleep monitoring system of the invention has the functions of automatically covering a kid with a quilt, alarming for high fever and enuresis, and the like, and has a high level of intelligence. Long-term test shows that the intelligent sleep monitoring system can prevent kids from kicking quilts in sleep in a fully automatic way and improve the quality of sleep of both kids and parents.

Shooting bow with pulleys

Abstract: A shooting bow includes pulleys, a string latch, bow riser, barrel, first limb, second limb, a first cam, and a second cam. The bow riser is enjoined with the barrel. The first and second limbs extend from the bow riser. The first and second cams are pivotally retained on the first and second limbs. A bowstring is retained by the first and second cams. A first pulley and a second pulley are retained on the barrel. Both cams have a string track and a cable track. One end of the string is coupled to the first cam and the other end is coupled to the second cam. As for both cables, one end is coupled to the first cam, the middle of the cable travels around a pulley or track, and the other end is coupled to the first limb, first cam axle or back to the cam.

Combined storage and docking unit for a portable electronic device

Abstract: A combined storage and docking unit for attachment to the instrument panel of a motor vehicle is disclosed in which a portable electronic device such as an MP3 player or GPS navigation device can be held in a display position by clamping it between lid and storage box parts of the combined storage and docking unit. The storage box includes a trough shaped portion in which the portable electronic device can be stowed if it is not required to be used. The storage box also includes a lid hingedly connected thereto. A lid opening mechanism includes an arm fixed to a shaft. A drive cable is connected to the arm and to a spring on opposing ends. A pulley is configured to guide the drive cable from the arm to the spring, wherein the shaft is rotatably supported by a shaft bracket.

Climbing deicing robot

Abstract: Climbing deicing robot relates to deicing robot field, and that has solved that current deicing robot exists sends the iron tower eminence to, can only realize the problem of single deicing function by the manual work. Including drive mechanism, two first deicing mechanisms that the structure is the same and second deicing mechanism, two first climbing mechanisms that the structure is the same and second climbing mechanism, two first manipulator mechanisms that the structure is the same and second manipulator mechanism, first deicing mechanism and second deicing mechanism install respectively in the drive mechanism left and right sides, and first climbing mechanism and second climbing mechanism install both ends around drive mechanism respectively, and first manipulator mechanism installs on first climbing mechanism, and second manipulator mechanism installs on the mechanism is scrambleed to the second. The utility model discloses a mode that pulley and arm match realizes barrier more, simple structure, and the reliability is high, has realized arm climbing, deicing, has got over nimble multi-purpose purpose such as barrier, measuring, has reduced the requirement to auxiliary device, has more actual meaning.

Section material cutting machine with air-pushing location

Abstract: The invention discloses a section material cutting machine with air-pushing location. The section material cutting machine with the air-pushing location comprises an air-pushing type location device and a cutting device, wherein the cutting device is located on the downstream of the air-pushing type location device, the air-pushing type location device comprises an operating desk, a plurality of electric air cylinders and a plurality of location plates, wherein the electric air cylinders and the location plates are arranged on the operating desk, a plurality of the electric air cylinders are fixed on the operating desk in two parallel rows, the cutting device comprises a rack, a protective shell, a cutting wheel, cutting wheel fixing plates, a cutting wheel drive motor and a drive pulley, wherein the cutting wheel, the cutting wheel fixing plates, the cutting wheel drive motor and the drive pulley are arranged in the protective shell, the bottom of the protective shell is open, a slide groove is formed in the rack, a slide block is arranged on the top of the protective shell, the slide block penetrates through the slide groove, a fixing seat is arranged on the top of the slide block, a drive air cylinder is arranged on the rack, and a push rod of the drive air cylinder fixes the fixing seat. The section material cutting machine with the air-pushing location has the advantages that the accuracy when a section material is cut is guaranteed, the cutting effect is good, and work completing efficiency is high.

Design Of A Material Handling Equipment: Belt Conveyor System For Crushed Limestone Using 3 Roll Idlers

Abstract: In the process or manufacturing industry, raw materials and products need to be transported from one manufacturing stage to another. Material handling equipment are designed such that they facilitate easy, cheap, fast and safe loading and unloading with least human interference. For instance, belt conveyor system can be employed for easy handling of materials beyond human capacity in terms of weight and height. This paper discusses the design calculations and considerations of belt conveyor system for limestone using 3 rolls idlers, in terms of size, length, capacity and speed, roller diameter, power and tension, idler spacing, type of drive unit, diameter, location and arrangement of pulley, angle and axis of rotation, control mode, intended application, product to be handled as well as its maximum loading capacity in order ensure fast, continuous and efficient movement of crushed limestone while avoiding halt or fatalities during loading and unloading. The successful completion of this research work has generated design data for industrial uses in the development of an automated belt conveyor system which is fast, safe and efficient.

Design of two stage planetary gear train for high reduction ratio

Abstract: Planetary Gear Trains are extensively used for the power transmission and are the most critical component. Planetary gearboxes are used frequently to match the inertias, lower the motor speed, boost the torque, and at the same time provide a sturdy mechanical interface for pulleys, cams, drums and other mechanical components. This paper presents the advantages of planetary gear systems over other, consideration to be given while determining the reduction ratios of gear box, minimum and maximum reductions per stage of planetary gear pairs. Also the case study to determine the reduction ratio of two stage gear box is discussed. The comparison of planetary gear system over helical gears systems is done on the basis of volume, weight and torque density

Test stand and method for ultra-deep mine hoisting systems

Abstract: The invention discloses a test stand and a method for ultra-deep mine hoisting systems. The test stand comprises four variable-frequency motors (1), four hoist drums (2), horizontal guide rails (3), a hoisting container (4), a pose angle sensor (5), tension sensors (6), servo hydraulic cylinders (7), steel wire ropes (8), pulleys (9), a variable-frequency motor controller (10), wire and strand breakage detectors (11) for the steel wire ropes, a servo hydraulic cylinder controller (12), a pose monitoring device (13), a tension wheel (14), a tension spring (15) and universal wheels (16). The four hoist drums (2) correspond to the four variable-frequency motors (1). The test stand and the method have the advantages that vertical hoisting working conditions under actual working conditions can be replaced by motor horizontal dragging modes which can be easily implemented by the motors of the test stands, accordingly, the test stand is simple in operation and easy to maintain, and various functions can be simulated by the aid of the test stand.

Wood board processing table with two-side grinding function

Abstract: The invention relates to the field of the door industry manufacturing and particularly relates to a wood board processing table with a two-side grinding function. The processing table comprises a work table, a rail, a grinding mechanism and clamping mechanisms for clamping a wood board. The clamping mechanisms comprise clamping heads, side clamping blocks, guide columns, air cylinders and tensioning rods. The clamping heads are in sliding connection onto the guide columns which are fixed on the side clamping blocks, telescopic rods of air cylinders are fixed with the side clamping blocks, fixing rods are arranged on the air cylinders, and stroke holes are formed in the side clamping blocks. The ends of the tensioning rods are hinged to the fixing rods, and the other ends are hinged to the clamping heads. The grinding mechanism comprises upper and lower grinding rollers and a support for mounting the grinding rollers, and the support is connected onto the rail through a pulley. The processing table has the advantages that the edges of the wood plate are clamped, the upper and lower sides of the wood board can be ground through dual symmetric grinders, upper and lower balance forces are applied to grinding points, and accordingly, bending of the wood board can be prevented, and a good grinding effect is provided.

Electric vehicle charging system

Abstract: A cable management system for an electric vehicle (EV) charging station comprises an upstanding enclosure having a cable opening though which an EV charging cable can be pulled for extension. The EV charging cable is provided at a free end thereof with an EV charging connector for connection with an EV charging socket of an EV. The EV charging cable is provided at an opposed fixed end thereof with an electric connector for connection with a mating connector mounted inside the enclosure. A fixed pulley is mounted within the upstanding enclosure for rotation about a first axis normal to an upstanding axis of the enclosure. The system further comprises a mobile pulley rotatable about a second axis parallel to the first axis. The mobile pulley is vertically translatable within a guiding structure mounted inside the upstanding enclosure for movement towards and away from the fixed pulley. The fixed pulley is mounted at a higher elevation than the mobile pulley. The EV charging cable extends over the fixed pulley and the mobile pulley between its opposed free and fixed ends. The mobile pulley is moveable against gravity from a lowered position to a raised position by the application of a sufficient pulling force at the free distal end of the EV charging cable. The mobile pulley returns at least partly under gravity to its lowered position upon release of the EV charging cable, thereby automatically retracting the cable inside the upstanding enclosure.

Intelligent sewage interception shunting device

Abstract: The utility model discloses an intelligent sewage interception shunting device. The intelligent sewage interception shunting device comprises an underground sewage interception well case (1) provided with a water inlet (2), an interception port (3) and a water outlet (4), wherein the interception port is matched with a turning plate link gear, the turning plate link gear comprises a hydraulic turning plate (5), which is inclined under the normal state, and a follow-up module, which is capable of opening or closing the interception port, an on-line detection probe (11) connected to a ground intelligent control cabinet (13) through a signal line is arranged nearby the interception port, the inner wall of the sewage interception well case 1 is fixedly connected to a transmission mechanism (12) controlled by the intelligent control cabinet, a turning plate box is connected to the hydraulic turning plate through a wire rope (8) bypassing a fixed pulley (9), and the top of the inner wall of the sewage interception well case is fixedly connected to an infrared camera (17). The intelligent sewage interception shunting device has the beneficial effects that automatic control and remote intelligent control are synthesized and coordinated with each other, the opening state of the hydraulic turning plate is subjected to sorting treatment according to the water quality condition and the water volume condition, and the purpose of intelligent control is achieved.

Continuous multi-joint mechanical arm device

Abstract: The invention provides a continuous multi-joint mechanical arm device. The continuous multi-joint mechanical arm device comprises two parts, i.e. a pedestal and a mechanical arm, wherein the pedestal part consists of a driving part, a lower motor fixing plate, an upper motor fixing plate, a lower pulley plate, an upper pulley plate, a pulley component and connecting rods; the connecting rods are arranged among the plates; the driving part comprises a motor, a coupler and a screw rod; the mechanical arm consists of a joint with two freedom degrees and a plurality of joint backbones; each joint and each joint backbone are of the same structure; the driving part is arranged in the pedestal of the mechanical arm device; the other end of the driving device is connected with a rope; the other end of the rope is fixed to joint plates of the joint backbones. The mechanical arm provided by the invention is flexible in structure, so that the continuous multi-joint mechanical arm device is good in obstacle avoidance ability; the mechanical arm is applied in a narrow and complex work space environment, such as ruins rescuing and mechanical fitting assembly, so that the continuous multi-joint mechanical arm device is wide in application range.

Ultrasonic monitoring nursing table for pediatric surgical operation

Abstract: The invention relates to an ultrasonic monitoring nursing table for a pediatric surgical operation, and belongs to the technical field of medical instruments. The ultrasonic monitoring nursing table comprises a bottom supporting table body. Supporting leg fixing devices are arranged under the bottom supporting table body. Rotary supporting legs are arranged under the supporting leg fixing devices. Pulley fixing devices are arranged under the rotary supporting legs. Brake devices are arranged on the left sides of the pulley fixing devices. Movable pulleys are arranged under the pulley fixing devices. A power line output opening is formed in the left side of the bottom supporting table body. A power line is arranged on the left side of the power line output opening. A power plug is arranged on the lower portion of the power line. The ultrasonic monitoring nursing table is simple in structure and convenient to operate, can be used for comprehensively nursing a child when the surgical operation is conducted, the pain of the patient is relieved, the rehabilitation effect is improved, and the work load of medical staff is lightened.

Bituminous paving repairs and cares car

Abstract: The utility model discloses a bituminous paving repairs and cares car, including chassis and frame, be equipped with agitating unit and watering device on the upper surface of chassis, the chassis lower surface is equipped with to dig and mills device and compaction device, agitating unit is including agitator tank, agitator motor, stirring leaf and feeder hopper, the plane mills the device and mills the motor, digs including the plane and mill machines, belt pulley, first pneumatic cylinder and pivot, the compaction device is including second pneumatic cylinder and holding down plate, watering device is including water tank, outlet pipe and water-locator, install solar cell panel on the upper surface of frame. The utility model discloses with damaged road surface dig mill after again recycle make pitch and lay once more in damage department, have high environmental protection, high work efficiency's characteristics, the solar cell panel electricity generation, for the power supply of caring the car, the energy can be saved, it is energy-concerving and environment-protective, cold water in the water tank makes its quick cooling on spilling the pitch after filling, avoids uncolled and is rolled the deformation by the vehicle.

Punch press mechanical arm

Abstract: The utility model relates to the technical field of mechanical arms, in particular to a punch press mechanical arm. The punch press mechanical arm comprises a rack, a lifting seat, a lifting driving device, a rotary seat, a rotary driving device, a telescopic device, a correction swing arm and suction cups. The telescopic device comprises a sliding table, a telescopic arm, a first synchronous pulley transmission mechanism and a telescopic driving motor. The first synchronous pulley transmission mechanism comprises two synchronous pulleys and a synchronous belt. The output end of the telescopic driving motor is in driving connection with the synchronous pulley located at the rear end of the sliding table. One section of the synchronous belt is fixedly connected to the telescopic arm. Sliding rails are arranged on the two sides of the sliding table respectively. The telescopic arm is connected with the sliding rails in a sliding mode. According to the punch press mechanical arm, a workpiece can be automatically taken and placed and driven to ascend, descend, rotate, stretch, retract, move horizontally and the like, work efficiency is high, safety and reliability are achieved, accuracy is high, the sliding rails of the sliding table are externally arranged, the size of the sliding table and the size of the whole mechanical arm can be reduced, the rigidity and the strength of the sliding table are improved, and the accuracy of the sliding table is improved.