The invention discloses a processing device of an internal keyway of a tapered hole of a large workpiece. The processing device comprises a guide rod, a broach sheet, rack guide rails, a fixture body, a locating pin, a locating rod, a worktop, a feed workbench, a coupling mechanism, a worm and gear, a hydraulic cylinder, a machine tool body, a hand feed device, a broach rod, a primary motion hydraulic cylinder, a fixing device and a bearing pedestal, wherein one end of the worktop used for placing and locating the workpiece is connected with the machine tool body by a fixed hinged support, and the upper end of the hydraulic cylinder is articulated with the other end of the worktop. The processing device can process the internal keyway of the tapered hole of the large workpiece, is simple in structure, convenient to mount and high in practicability, and has the characteristics that a small mechanism can process the large workpiece and the processing precision is high; and parts and components are high in standardization degree and universalization degree.

Processing device of internal keyway of tapered hole of large workpiece

The invention relates to a gear shaft machining method and a gear shaft clamping tool used in the method. The gear shaft machining method comprises the following steps: 1, installing a stepped shaft sleeve on a rotary worktable of a vertical gear hobber, and adjusting a stepped hole of the stepped shaft sleeve to be coaxial with the rotary worktable, wherein the diameter of an inner hole at the upper end of the stepped shaft sleeve is large, and the diameter of an inner hole at the lower end of the stepped shaft sleeve is small; 2, inserting a lower stepped shaft structure of a gear shaft to be machined into the stepped hole of the stepped shaft sleeve from top to bottom, and after adjusting the gear shaft to be coaxial with the stepped hole, locking the gear shaft on the stepped shaft sleeve by using the cooperation of at least two sets of threaded holes and corresponding locking bolts, wherein at least two sets of threaded holes are arranged on the stepped shaft sleeve in an up-and-down spaced setting mode; and 3, carrying out machining on a gear machining section of the gear shaft by using a gear hobbing head on the vertical gear hobber. The invention provides a gear shaft machining method through which the up-down moving stroke of the gear hobbing head on a corresponding stand column can be reduced.

Gear shaft machining method and gear shaft clamping tool used in method

The invention belongs to a technology for processing and manufacturing a crankshaft of a diesel engine of an internal combustion railway locomotive, and provides a drilling jig aidauxiliary device for a crankshaft flange hole of a diesel engine. The drilling jig aidauxiliary device comprises a bottom plate (1), a transitional sleeve (2), a positioning screw (5), a plurality of flange hole rapid-changing sleeves (3) and a plurality of lifting ring screws (4); wherein the bottom plate (1) is provided with a plurality of through holes for installation of the transitional sleeve along the circumference; the flange hole rapid-changing sleeves (3) are divided into three types: fine drilling sleeves, crude hinging sleeves and fine hinging sleeves; and two lifting ring screws (4) are adopted and are fixed on two corresponding sides of the bottom plate (1). The drilling jig aidauxiliary device for the crankshaft flange hole of the diesel engine has the advantages of reasonable design structure and simpleness and convenient convenience in use, the manufacturing accuracy of the crankshaft of the diesel engine of the internal combustion locomotive can be achieved, and the working efficiency can be improved greatly.

Drilling jig auxiliary deviceaid for crankshaft flange hole of diesel engine

The invention provides a vertical indexing device and belongs to the technical field of machining. The vertical indexing device comprises a sliding rod, a sliding sleeve, a pawl, a ratchet wheel, a column pin, a positioning rod, a reset spring, a positioning fluted disc and a vertical worktable. The sliding rod is arranged on the sliding sleeve in a left-and-right sliding mode and connected with the left end of a piston rod, a triggering block is arranged on the left side of the sliding rod, a first travel switch and a second travel switch are located on the left side and the right side of the triggering block, the column pin is fixed to the sliding rod, one end of the positioning rod is hinged to a bearing support, the other end of the positioning rod tightly abuts against the column pin, the reset spring is arranged between the positioning rod and the bearing support, an output shaft is vertically and rotationally arranged on the bearing support, the ratchet wheel and the positioning fluted disc are coaxially and fixedly installed on the output shaft, the pawl is installed on the sliding rod and meshed with the ratchet wheel, and the vertical worktable is coaxially and fixedly installed at the upper end of the output shaft. Precise indexing positioning of the vertical worktable is achieved, and the vertical indexing device is reasonable in structure, small in size and good in positioning precision.

Vertical indexing device

A numerical control gear shaving machine comprises a machine base, a working table arranged above the machine base and a control panel hinged to the working table; a rack is arranged on one side of the working table, a tool mounting head is arranged on the rack, a tool is arranged on the tool mounting head, a first sliding way and a second sliding way are arranged on the left side and the right side of the working table correspondingly, a first positioning device matched with the first sliding way is mounted on the first sliding way, and a second positioning device matched with the second sliding way is mounted on the second sliding way; the first positioning device is connected with a first oil cylinder, and the second positioning device is connected with a second oil cylinder; and a sliding base is arranged between the first sliding way and the second sliding way. The numerical control gear shaving machine can automatically carry out tool setting, a worker does not need to carry out tool setting, in the tool setting process, the condition that due to collision of the tool and teeth of a gear, the teeth of the gear are damaged is avoided, positioning shafts of different shaft diameters can be more rapidly replaced, and it is ensured that the numerical control gear shaving machine can machine gears of different types.

Numerical control gear shaving machine

The invention discloses an inner-cone spline broaching machine tool, which comprises a base, a broaching tool, a sliding plate, a cutter relieving cylinder assembly, a working device and a driving device. The base is arranged on a machine tool body and is provided with a guiding seat thereon; one end of the broaching tool extends into the machine tool body, and the broaching tool is connected with a stretching cylinder in the machine tool body and can be vertically and slidably arranged on the guiding seat; the sliding plate is sleeved on the guiding seat and is slidably arranged on the base;the cutter relieving cylinder assembly is arranged on the base, and an extending end of the cutter relieving cylinder assembly is connected with the sliding plate; the working device is arranged on the sliding plate and is used for fixing inner-cone splines; and the driving device is arranged on the sliding plate and is used for driving the working device to rotate one indexing unit each time. According to the inner-cone spline broaching machine tool disclosed by the invention, the inner-cone splines are machined by a broaching tool in a broaching manner, the precision by adopting the broaching tool is higher than the precision by adopting gear planning, and the efficiency by adopting the broaching tool is higher the efficiency by adopting the gear shaping and the gear planning; the working device carries out operations, such as automatic indexing, automatic broaching tool feeding, retracting and the like, by the driving device, thus the indexing operation is uniform and reliable, andthe degree of automation is high; and the inner-cone spline broaching machine tool disclosed by the invention is convenient to be detached, and can carry out multiple specifications of inner-cone spline operations by replacing the working device.

Inner-cone spline broaching machine tool

Tool changing device for vertical broaching machine

The utility model relates to a high-precision clamp for processing a shaft gear. The clamp is connected with a machine table through T-shaped bolts; a positioning sleeve is connected with a base through bolts; a worm is mounted on the base; the axis of the worm and the axis of the base are vertical lines in different planes; in the manner of rotating a deep groove ball bearing around the axis of a worm gear, the worm gear is mounted on the base, the axis of the worm gear is superposed with the axis of the base, and the two ends of the worm gear are fixed by the deep groove ball bearing and a tapered roller bearing; the worm gear is driven to rotate around the axis under the rotating action of the worm; nuts are in matching connection with the worm gear through the bolts; a screw rod which is engaged with the worm is driven to move up and down under the rotating action of the worm; the screw rod is connected with a spring chuck through a connecting sleeve and is used for driving the spring chuck to move up and down; and when the spring chuck is deformed or restored, a workpiece is tightened or released. The high-precision clamp for processing the shaft gear has the beneficial effects of accurate positioning, reliable clamping, convenience and fastness in operation, time-saving and labor-saving property, and capability of increasing the precision of processing a gear shaft.

High-precision clamp for processing shaft gear

A double-end grinding wheel chamfering machine for a straight tooth disc gear is provided with a base, a rotating table is arranged in the middle of the base, a positioning mould is mounted on the rotating table, the positioning mould is connected with a replaceable positioning plate, a pressure plate for pressing a workpiece is arranged at the upper part of the positioning plate, upright posts respectively positioned on two sides of the rotating table are arranged on the base, a bidirectional adjusting mechanism is arranged on the upright posts, a grinder is hung on the bidirectional adjusting mechanism, a dust collection pipe is arranged on the bidirectional adjusting mechanism, and the mouth of the dust collection pipe is positioned at the lower end of the grinder. Since two grinding wheels are adopted to chamfer two ends at the same time, the work efficiency is greatly improved. Since a dust removing device is adopted to absorb dust, the environmental cleanliness is improved.

Chunlei Xu

Papers

Inner-cone spline broaching machine tool

Tool changing device for vertical broaching machine

High-precision clamp for processing shaft gear

Double-end grinding wheel chamfering machine for straight tooth disc gear

Broach cuttings removing device for vertical broaching machine