CN104785863A - Large-diameter internal gear broaching machining device - Google Patents

Abstract

The invention relates to a large-diameter internal gear broaching machining device which comprises an oil cylinder, a following support, a cutter holder, a combined broach, a working table supporting base, a working table lifting mechanism, a rotating working table and a lathe bed. The oil cylinder is connected with the cutter holder through a piston pull rod. The piston pull rod is fixed to the following support. The combined broach is connected with the cutter holder. The working table lifting mechanism and the rotating working table are arranged on the working table supporting base. The rotating working table is connected with the working table lifting mechanism. The following support is installed on a guide rail of the lathe bed. The working table supporting base is fixed to the lathe bed. According to the large-diameter internal gear broaching machining device, a large-diameter gear can be machined in a broached mode, the problem that due to restriction of factors like the ability of a broaching machine, teeth of the large-diameter internal gear can not be machined in a broached mode is solved, the machining efficiency of the large-diameter internal gear can be improved greatly, the manufacturing cost of a broaching cutter can be greatly reduced, the number of times of cutter grinding of the cutter is increased, the service life of the cutter is prolonged, and the requirement for machining internal gears with different diameters in the broached mode can be met.

Description

A large-diameter internal gear broaching device

technical field

The present invention relates to a technical field of mechanical processing, in particular to a broaching device for large-diameter internal gears.

Background technique

In the field of machining technology, the broaching method is used to process the inner surface of mechanical parts such as internal gears, which not only has high processing efficiency, but also has low vibration and noise. However, limited by the capacity of broaching machine tools, the current broaching method can only be used to process internal gears with small diameters. Internal gears with large diameters are still processed by gear shaping. Not only the processing efficiency is low, but the processing process The impact of vibration and noise is also relatively large.

Contents of the invention

The technical problem to be solved by the present invention is to provide an internal gear broaching device suitable for broaching large-diameter internal gears according to the deficiencies of the prior art. Tooth broaching.

The technical solution to solve the above technical problems is: a large-diameter internal gear broaching device, including an oil cylinder, a follower bracket, a tool holder, a combined broach, a workbench support, a workbench lifting mechanism, a rotary workbench and a bed , the oil cylinder is connected with the tool holder through the piston rod, the piston rod is fixed on the follower bracket, the combined broach is connected with the tool holder, the workbench lifting mechanism and the rotary workbench are arranged on the working On the table support, the rotary table is connected with the workbench lifting mechanism, the follow-up support is installed on the guide rail of the bed, and the workbench support is fixed on the bed.

A further technical solution of the present invention is: the workbench lifting mechanism includes a drive motor, a screw nut pair and a workbench base, and the screws of the drive motor and the screw nut pair are axially fixed on the workbench support, so that The workbench base is installed on the guide rail of the workbench support, and the workbench base is fixedly connected with the nut of the screw nut pair.

The rotary workbench includes a workbench, a motor and a worm gear pair. The workbench is arranged on the base of the workbench. The workbench is connected with the worm gear of the worm gear pair and fixed on the base of the workbench through bearings. The worm of the electric motor and the worm gear and worm pair is axially fixed on the base of the workbench.

The large-diameter internal gear broaching device also includes a tool bar guide device, which is arranged on the workbench support, and the tool bar guide device is provided with a guide groove for the combined broach to pass through , Rollers are arranged in the guide groove.

The combined broach includes a broach body and a blade module, the broach body is provided with a broach groove, and the blade module is a plurality of broach blades, the multiple broach blades are respectively arranged on the broach In the broach groove, and fixed in the broach groove by the fastening kit.

The fastening set includes wedges and bolts.

One end of the broach blade is provided with 1-10 broaching edges of internal gear teeth.

The two sides of the end of the broach body in contact with the roller are provided with protruding parts, and the protruding parts are placed in the guide groove.

The workbench is provided with a T-shaped groove or a screw hole for clamping the clamp of the internal gear blank to be processed, and the workbench is also provided with a positioning device for keeping the fixture coaxial with the workbench.

Due to the adoption of the above technical solution, a large-diameter internal gear broaching device of the present invention has the following beneficial effects:

1. It can greatly improve the processing efficiency of large-diameter internal gears:

The invention is provided with a rotary table, which can drive the internal gear clamped on the rotary table to rotate, so that the large-diameter internal gear can be processed by several times of broaching. The invention can broach one or several gear teeth of the internal gear through one broaching stroke. The broaching process of the broaching machine is: after a broaching stroke, the broach returns, and the rotary table rotates at a corresponding angle (one or several teeth of the internal gear) to complete a broaching cycle. The broaching of large-diameter internal gears is completed through several cycles of "broaching broaching motion - broaching tool return - table rotation - broaching broaching motion", which solves the problem that is limited by the broaching machine capacity and other factors. The problem of broaching large-diameter internal gear teeth can greatly improve the processing efficiency of large-diameter internal gears.

2. Adapt to the broaching requirements of internal gears with different diameters:

Since the combined broach in the present invention has a non-completely symmetrical (section) structure, the axis of the broach and the axis of the internal gear to be processed generally do not coincide during broaching, so the broaching device adds a lifting mechanism of the rotary table, The axis of the rotary table is lowered when processing smaller internal gears, and the axis of the rotary table is raised when processing larger diameter internal gears to meet the broaching requirements of internal gears of different diameters.

3. Increase the number of times the tool can be sharpened and improve the service life:

The combined broach of the present invention includes a broach body and a blade module. The broach is provided with one or several broaching edges of internal gear teeth. The blade module adopts a standardized structure and is installed on the last (right) blade module. It is the standard blade module initially manufactured, and the cutting edges of the blade modules arranged to the left are sharpened successively. After the combined broach is worn out, the leftmost blade module is scrapped, and the cutting edges of the blade modules on the right are gradually ground and turned to the left. Move, add a standard blade module to the far right, and the cutting performance of the combined broach will be fully restored. This can greatly reduce the manufacturing cost of the broaching tool, increase the sharpening times and improve the service life of the tool.

4. It can greatly reduce the vibration and noise of large-diameter gear processing by gear shaping:

Because the present invention is by improving the structure of existing broaching machine, broaching tool, adopts the method for multiple broaching to finish the broaching process of internal gear, has realized the broaching process of large-diameter internal gear, is still different from existing large-diameter internal gear Compared with gear shaping, the vibration and noise generated by the machining of large-diameter internal gears will be greatly reduced. The invention has the advantages of simple structure, convenient operation and convenient popularization and use.

In the following, the technical features of a large-diameter internal gear broaching device of the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1: A structural schematic diagram of a large-diameter internal gear broaching device of the present invention.

Fig. 2: Schematic diagram of the structure of the combined broach in the present invention.

Fig. 3: Schematic diagram of the structure of the combined broach set in the guide device of the knife bar in the present invention.

In the above-mentioned accompanying drawings, each label is explained as follows:

1-oil cylinder, 2-piston rod, 3-following bracket, 4-knife holder, 5-combined broach, 51-broach body, 52-blade module, 53-fastening kit, 6-tool bar guide, 61-Guide groove, 62-Roller, 7-Workbench support, 8-Workbench lifting mechanism, 81-Drive motor, 82-Screw nut pair, 83-Workbench base, 9-Rotary workbench, 91- Workbench, 92-motor, 10-bed.

Detailed ways

A large-diameter internal gear broaching device, including an oil cylinder 1, a follower bracket 3, a tool holder 4, a combined broach 5, a tool rod guide device 6, a worktable support 7, a worktable lifting mechanism 8, and a rotary worktable 9 and the bed 10, the follower bracket 3 is installed on the guide rail of the bed 10, and can move on the bed guide parallel to the axis of the oil cylinder, and the workbench support 7 is fixedly arranged on the bed 10 Above, the oil cylinder 1 is connected with the tool holder 4 through the piston rod 2, the piston rod 2 is fixed on the follower bracket 3, the combined broach 5 is connected with the tool holder 4, and the working table is lifted The mechanism 8 is arranged on the workbench support 7, the said rotary workbench 9 is arranged on the workbench support 7, and is connected with the workbench lifting mechanism 8, and the said workbench support 7 is fixed on the bed 10 .

The knife bar guide 6 is arranged on the workbench support 7, the knife bar guide 6 is provided with a guide groove 61 for the combined broach 5 to pass through, and the guide groove 61 is provided with a roller 62 , the tool bar guide device 6 can not only prevent the combined broach 5 from shifting during the broaching process, but also reduce the friction between the combined broach 5 and the guide groove 61 through the rolling of the roller. The combined broach 5 includes a broach body 51 and a blade module 52 , protruding parts are provided on both sides of the end of the broach body 51 in contact with the roller 62 , and the protruding parts are placed in the guide groove 61 . The broach body 51 is provided with a broach groove, and the blade module 52 is a plurality of broach blades. The number of the broach blade modules can be determined according to actual use, which can be 10-40 pieces. One end of the broach blade is provided with three broaching blades of internal gear teeth. The multi-piece broach blade modules are respectively arranged in the broach grooves, and fixed in the broach grooves through the fastening kit 53, and installed at the end (See Figure 1 for the rightmost side) The blade module is the standard blade module initially manufactured, the cutting edges of the blade modules arranged from right to left are sharpened successively, the fastening kit 53 includes bolts and 2 wedges, The two wedges are provided with inclined surfaces that cooperate with each other. Through the wedges, the multi-piece broach blade modules can be well fixed in the broach grooves, and then the wedges are fixed in the broach grooves by bolts, which can prevent The broach blade module disengages during use.

The workbench lifting mechanism 8 includes a drive motor 81, a screw nut pair 82 and a workbench base 83, and the screw rods of the drive motor 81 and the screw nut pair 82 are axially fixed on the workbench support 7, and the The workbench base 83 is installed on the guide rail of the workbench support 7, and can move up and down along the track. The workbench base 83 is fixedly connected with the nut of the screw nut pair 82, and moves up and down by the screw mandrel drive. The rotary table 9 includes a table 91, a motor 92 and a worm gear pair, the table 91 is arranged on the table base 83, the table 91 is connected with the worm wheel of the worm gear pair, and passes (roll or slide) ) bearings are fixed on the base 83 of the workbench, and the worms of the motor 92 and the worm gear pair are also axially fixed on the base 83 of the workbench. Driven by the motor 92 and the worm, the table 91 can rotate around the axis parallel (or coaxial) with the cylinder (or broach) axis. The workbench 91 is provided with a T-shaped groove or a screw hole for clamping the clamp of the internal gear blank to be processed, and the workbench 91 is also provided with a positioning device for keeping the fixture coaxial with the workbench 91 . When in use, the internal gear to be processed is installed on the workbench 91, and the combined broach 5 is driven by the oil cylinder 1 to perform broaching several times to process the large-diameter gear.

As a modification of this embodiment: one end of the broach blade can be provided with one or more broaching blades of internal gear teeth, for example, 1, 2, 3, 4, 5 1 or 10, you can use the corresponding broach blade according to actual needs.

Claims (9)

1. A large-diameter internal gear broaching device, characterized in that it includes an oil cylinder (1), a follower bracket (3), a tool holder (4), a combined broach (5), and a workbench support (7) , worktable lifting mechanism (8), rotary worktable (9) and bed (10), the oil cylinder (1) is connected with the tool holder (4) through the piston rod (2), and the piston rod (2 ) is fixed on the follower bracket (3), the combined broach (5) is connected with the tool holder (4), the worktable lifting mechanism (8) and the rotary worktable (9) are set on the workbench support On the seat (7), the rotary table (9) is connected to the table lifting mechanism (8), the follow-up bracket (3) is installed on the guide rail of the bed (10), and the table The support (7) is fixed on the bed (10). 2. A large-diameter internal gear broaching device according to claim 1, characterized in that: the table lifting mechanism (8) includes a driving motor (81), a screw nut pair (82) and a working The table base (83), the drive motor (81) and the screw of the screw nut pair (82) are axially fixed on the workbench support (7), and the workbench base (83) is installed on the workbench support On the guide rail of (7), the described workbench base (83) is fixedly connected with the nut of the screw nut pair (82). 3. A large-diameter internal gear broaching device according to claim 2, characterized in that: the rotary table (9) includes a table (91), a motor (92) and a worm gear pair, the The workbench (91) described above is set on the workbench base (83), the workbench (91) is connected with the worm wheel of the worm gear pair, and is fixed on the workbench base (83) through bearings, and the motor (92 ) and the worm of the worm gear pair are axially fixed on the workbench base (83). 4. A large-diameter internal gear broaching device according to claim 1, characterized in that: said large-diameter internal gear broaching device further comprises a tool bar guide (6), the tool bar guide (6) Set on the workbench support (7), the said guide bar guide (6) is provided with a guide groove (61) for the combined broach (5) to pass through, said guide groove (61 ) is provided with rollers (62). 5. A large-diameter internal gear broaching device according to claim 1, characterized in that: the combined broach (5) includes a broach body (51) and a blade module (52), and the The broach body (51) is provided with a broach groove, and the blade module (52) is a plurality of broach blades, which are respectively arranged in the broach groove, and passed through the fastening kit (53 ) is fixed in the broach groove. 6. A large-diameter internal gear broaching device according to claim 5, characterized in that: said fastening set (53) includes wedges and bolts. 7. A large-diameter internal gear broaching device according to claim 5, characterized in that: one end of the broach blade is provided with 1-10 broaching edges for internal gear teeth. 8. A large-diameter internal gear broaching device according to claim 5, characterized in that: the broach body (51) is provided with protrusions on both sides of the end in contact with the roller (62), and the protrusions The outlet is placed in the guide groove (61). 9. A large-diameter internal gear broaching device according to claim 3, characterized in that: said workbench (91) is provided with a T-shaped groove or a screw hole for clamping the workpiece blank of the internal gear to be processed , the workbench (91) is also provided with a positioning device that keeps the jig coaxial with the workbench (91).