Internal spiral spline machining device

Abstract

The utility model discloses an internal spiral spline machining device which comprises a cutter bar, the cutter bar is installed on a lathe spindle, the lathe spindle is installed on a lathe spindle box, the lathe spindle box is installed on a lathe body, a blade is installed on the cutter bar, and the tooth profile of the blade is designed according to the normal tooth profile of an internal spiral spline. The part is fixed on a lathe follow rest through a clamp; the fixture comprises a fixture seat and a positioning sleeve, a part is mounted in an inner hole of the positioning sleeve and fixed, the positioning sleeve is fixedly connected with the fixture seat through a fixing bolt, and the fixture seat is fixedly mounted on a lathe follow rest. According to the utility model, the turning thread gear engaging function of a common lathe is utilized, a product is fixed on a lathe follow rest to do axial movement, a cutter does rotary movement, and the two kinds of movement construct a movement ratio to form an inner hole spiral track, so that an internal spiral spline is cut, and the internal spiral spline cutting device has the advantages of simple structure and high working efficiency.

Description

Technical Field

[0001] This utility model relates to an internal spiral spline processing device. Background Technology

[0002] In the manufacturing of transmission gears and splines, for internal spur splines, processes such as gear shaping, wire cutting, and broaching are available, each with dedicated equipment. However, there is no dedicated equipment available for internal helical splines. The structure of internal helical spline 1 is as follows: Figure 1 , Figure 2 As shown, the existing method involves modifying the spline broaching machine to fix the product in place, while the spline broach moves axially and rotates synchronously in a proportional manner. This allows the spline broach to cut internal helical splines. However, this method is too complex to modify the equipment, so it is limited to broaching internal helical splines on special parts, and the manufacturing cost is high, resulting in a narrow range of applications. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides an internal spiral spline processing device with simple structure and high working efficiency.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: an internal helical spline machining device, including a tool holder, the tool holder is mounted on the lathe spindle, the lathe spindle is mounted on the lathe headstock, the lathe headstock is mounted on the lathe bed, the tool holder is equipped with a cutting tool, the cutting tool tooth profile is designed according to the normal tooth profile of the internal helical spline, and the part is fixed on the lathe follow post by a fixture.

[0005] The aforementioned internal helical spline machining device includes a fixture base and a positioning sleeve. The part is installed and fixed in the inner hole of the positioning sleeve. The positioning sleeve is fixedly connected to the fixture base by fixing bolts. The fixture base is fixedly installed on the lathe tool holder.

[0006] In the aforementioned internal helical spline machining device, the positioning sleeve is provided with a number of toothed positioning pins in the circumferential direction equal to the number of teeth of the internal helical spline.

[0007] In the aforementioned internal helical spline machining device, the tool holder axis is coaxial with the lathe spindle axis.

[0008] In the aforementioned internal helical spline machining device, the axis of the part is coaxial with the axis of the lathe spindle.

[0009] The beneficial effects of this utility model are as follows: This utility model utilizes the thread-cutting shift function of a conventional lathe. The product is fixed on the lathe and tool post and moves along the axis, while the tool rotates. The two movements create a motion ratio, which forms the internal helical trajectory, thereby cutting out the internal helical spline. It has the advantages of simple structure and high working efficiency. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of an internally threaded spline.

[0011] Figure 2 for Figure 1 Side view.

[0012] Figure 3 This is a schematic diagram of the structure of this utility model.

[0013] Figure 4 This is a schematic diagram of the tool holder.

[0014] Figure 5 for Figure 4 A-direction view.

[0015] Figure 6 This is a diagram showing the installation of the blade.

[0016] Figure 7 This is a schematic diagram of the blade's structure.

[0017] Figure 8 This is a sectional view of the fixture.

[0018] Figure 9 for Figure 8 The right view. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] This utility model utilizes the thread-cutting shift function of a conventional lathe. The product is fixed on the lathe and tool post 2 and moves along the axis, while the tool rotates. The two movements create a motion ratio, which forms the internal helical trajectory, thereby cutting out the internal helical spline.

[0021] like Figures 3-7 As shown, an internal helical spline machining device includes a tool holder 3, which is mounted on a lathe spindle 4. The axis of the tool holder 3 is coaxial with the axis of the lathe spindle 4. The lathe spindle 4 is mounted on a lathe headstock 5, which is mounted on a lathe bed 6. A cutting insert 13 is mounted on the tool holder 3 via a clamping screw 7. The tooth profile of the cutting insert is designed according to different pressure angle shapes, such as... Figure 5 As shown, Figure 5 The left and right images show the blade tooth profiles with pressure angles of 20° and 30° respectively; the blade tooth profile is designed according to the normal tooth profile of an internal helical spline. Figure 4 β is the helix angle; the part is fixed on the lathe follower post 2 by the fixture 12, the part is a spline with an internal helix, and the part is coaxial with the lathe spindle 4.

[0022] like Figure 8 , Figure 9As shown, the fixture 12 includes a fixture base 8 and a positioning sleeve 9. The part is installed and fixed in the inner hole of the positioning sleeve 9. The positioning sleeve 9 is fixedly connected to the fixture base 8 by fixing bolts 10. The positioning sleeve 9 has three evenly distributed bolt holes to facilitate tightening and fixing by fixing bolts 10 after tooth splitting. The fixture base 8 is fixedly installed on the lathe follow post 2. The positioning sleeve 9 is provided with tooth splitting positioning pins 11 in the circumferential direction, the number of which is equal to the number of teeth of the internal helical spline, for tooth splitting.

[0023] The working process of this utility model is as follows: The tool holder 3 with the blade 13 is installed on the lathe spindle 4, and the axis of the tool holder 3 is coaxial with the axis of the lathe spindle 4; the part is fixed on the lathe follower post 2 by the fixture 12, and the axis of the part is coaxial with the axis of the lathe spindle 4. When matching the gear shifting gear, the corresponding gear shifting position is selected according to the helix angle of the internal helical spline. In use, the part is loaded into the positioning sleeve 9 of the fixture, the tool holder 3 is first allowed to pass through and extend out of the inner hole of the part, and then the linkage cutting is started. The part moves backward and the tool holder 3 rotates to form an internal helical line cut in the inner hole. Then the tool is retracted to adjust the blade extension amount, and the linkage cutting is started again to continuously cycle until a complete tooth shape is removed. Then the process is repeated by indexing through the fixture until all the teeth of the internal helical spline are cut.

Claims

1. A device for machining internal helical splines, characterized in that: The tool holder is mounted on the lathe spindle, which is mounted on the lathe headstock, which is mounted on the lathe bed. The tool holder has a cutting insert with a tooth profile designed according to the normal tooth profile of an internal helical spline. The part is fixed to the lathe follow post by a fixture.

2. The internal helical spline processing device according to claim 1, characterized in that: The fixture includes a fixture base and a positioning sleeve. The part is installed in the inner hole of the positioning sleeve and fixed. The positioning sleeve is fixedly connected to the fixture base by fixing bolts. The fixture base is fixedly installed on the lathe tool post.

3. The internal helical spline processing device according to claim 2, characterized in that: The positioning sleeve is provided with a number of toothed positioning pins in the circumferential direction that are equal to the number of teeth of the internal spiral spline.

4. The internal helical spline processing device according to claim 1, characterized in that: The tool holder axis is coaxial with the lathe spindle axis.

5. The internal helical spline processing device according to claim 1, characterized in that: The part is coaxial with the spindle axis of the lathe.

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