A rotary machining assembly for machining external taper splines

Abstract

The utility model relates to the field of machining, concretely relates to a rotary processing subassembly for machining outer taper spline, including the positioning sleeve fixed on the lathe rotating platform, tool positioning disc and inner cold extrusion cutter, coaxial setting, positioning mandrel one end taper cooperation fixed with lathe main shaft, the other end penetrates positioning sleeve, tool positioning disc and inner cold extrusion cutter, and with eccentricity exists with positioning sleeve, workpiece is set up in positioning mandrel and is contacted with inner cold extrusion cutter, the upper part is pressed tightly by transmission pressure plate, and transmission pressure plate passes through the cooperation of the outer four square structures of inner four square holes and the upper end of positioning mandrel, and is linked with workpiece tooth groove through the tumbler, and the upper part of positioning sleeve is equipped with upper gland and provides axial pressure. The subassembly utilizes lathe rotating platform to drive tool rotation, and positioning mandrel drives workpiece synchronous rotation simultaneously, realizes outer taper spline cold extrusion processing, compact structure, compatible existing inner cold extrusion lathe, promotes equipment utilization and processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to a rotary machining assembly for machining external tapered splines. Background Technology

[0002] In recent years, cold extrusion technology has been increasingly applied in gear manufacturing. Currently, it is widely used for cold extrusion of inverted bevel gears, such as the spline gear seats of the driving and driven gears in gearboxes, as well as the internal hook teeth of the gear engagement sleeve. Compared with the traditional hook tooth process, the cold extrusion process is characterized by high processing efficiency, stable quality of processed parts, and good consistency of parts. This is the main reason why cold extrusion technology can be continuously promoted.

[0003] In the prior art, Chinese utility model patent application number 201922481921.5 discloses an internal spline extrusion processing device. This device includes a detachable first base and second base, a forming tray, and a support rod. It achieves a compact and scalable structure through threaded connections and interference fits, and combines a hydraulic shaft and ejector pins for precise processing. While this device can perform internal spline extrusion processing on workpieces, it cannot process external tapered splines. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a rotary machining component for machining external tapered splines, so as to solve the technical problem that external tapered splines cannot be machined on existing internal cold extrusion equipment.

[0005] The technical solution adopted by this utility model is: a rotary machining assembly for machining external taper splines, including a positioning sleeve fixed on a machine tool rotary table, an inner cold extrusion tool fixed on the positioning sleeve by a tool positioning plate, the three being coaxially arranged, one end of a positioning mandrel being arranged inside the machine tool rotary table, and the other end passing through the positioning sleeve, the tool positioning plate and the inner cold extrusion tool from bottom to top, and there is an eccentricity between the positioning mandrel and the central axis of the positioning sleeve, the workpiece being arranged through the positioning mandrel and in contact with the inner cold extrusion tool, and a transmission pressure plate for fixing the workpiece being provided above it.

[0006] As a preferred embodiment, an upper pressure cover for providing pressure is also provided above the positioning sleeve. The upper end of the upper pressure cover is connected to the machine tool, and the lower end is provided with a cavity. The upper pressure cover moves vertically under the drive of the machine tool.

[0007] As a preferred embodiment, the transmission pressure plate is provided with a through hole, one end of the pull pin passes through the through hole and contacts the tooth groove of the workpiece, and the other end is provided with a positioning nut and contacts the upper surface of the transmission pressure plate.

[0008] As a preferred embodiment, the upper end of the positioning mandrel has an outer square structure, and the center of the transmission pressure plate has a corresponding inner square hole. As a preferred embodiment, the tool positioning disc is connected to the positioning sleeve by a number of screws, and the internal cold extrusion tool is connected to the tool positioning disc by a number of screws.

[0009] As a preferred embodiment, the positioning mandrel is fixed to the machine tool spindle by a number of screws, and the positioning mandrel and the machine tool spindle are tapered together. The beneficial effects of this utility model are: To address the shortcomings of existing technologies, this invention provides a rotary machining assembly for processing external tapered splines. Through optimized structural design, this invention achieves the following technical advantages: Firstly, in this utility model, the positioning sleeve, the tool positioning plate, and the internal cold extrusion tool are arranged from bottom to top on the machine tool rotary table. The positioning mandrel passes through the positioning sleeve and has an eccentricity with the central axis of the positioning sleeve. By setting the tool on the machine tool rotary table, the stability of the tool during processing is ensured. Cold extrusion processing of external tapered splines is achieved without changing the original structure of the machine tool. This allows machine tools that can only process internal splines to process external tapered splines simply by changing components, thereby improving the utilization efficiency of the equipment and increasing the processing efficiency of external tapered splines.

[0010] Secondly, the outer square structure of the positioning mandrel cooperates with the inner square through hole of the transmission pressure plate, which can transmit the power of the positioning mandrel rotation to the transmission pressure plate. At the same time, the pin is fixed on the transmission pressure plate and the pin is positioned in the tooth groove of the workpiece 5, so that the positioning mandrel rotates while driving the workpiece to rotate. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of the present invention; In the diagram: 1. Positioning sleeve, 2. Tool positioning plate, 3. Internal cooling extrusion tool, 4. Transmission pressure plate, 5. Workpiece, 501. Tooth groove, 6. Upper pressure cover, 7. Pulley pin, 8. Positioning mandrel. Detailed Implementation

[0013] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0014] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in this utility model patent application specification and claims do not express a quantity limitation, but rather indicate the presence of at least one; terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0015] To more clearly describe the specific structural composition of this rotary machining assembly used for machining external tapered splines, in conjunction with the attached... Figure 1 - Appendix Figure 3 This embodiment is described as follows: This embodiment provides a rotary machining assembly for machining external taper splines, which includes a positioning sleeve 1 fixed on a machine tool rotary table, an internal cold extrusion cutter 3 fixed on the positioning sleeve 1 by a tool positioning plate 2, and the three are coaxially arranged. One end of the positioning mandrel 8 is set inside the machine tool rotary table, and the other end passes through the positioning sleeve 1, the tool positioning plate 2 and the internal cold extrusion cutter 3 from bottom to top. There is an eccentricity between the positioning mandrel 8 and the central axis of the positioning sleeve 1. The workpiece 5 is disposed through the positioning mandrel 8 and in contact with the internal cold extrusion cutter 3. A transmission pressure plate 4 for fixing the workpiece 5 is also provided above it.

[0016] In this embodiment, the tool positioning plate 2 is connected to the positioning sleeve 1 by four M8 socket head cap screws, while the internal cold extrusion tool 3 is connected to the tool positioning plate 2 by three M12 socket head cap screws, ensuring the stability of the tool position.

[0017] In this embodiment, one end of the positioning mandrel 8 is set inside the machine tool rotary table and fastened by two M12 hexagon socket screws, and is connected to the machine tool spindle in a tapered fit manner. The other end passes through the positioning sleeve 1, the tool positioning plate 2 and the internal cold extrusion tool 3 from bottom to top. There is a certain eccentricity between the positioning mandrel 8 and the central axis of the positioning sleeve 1, so as to adapt to the processing requirements of different workpieces.

[0018] In this embodiment, the workpiece 5 is disposed through the positioning mandrel 8 and contacts the inner cold extrusion knife 3. A transmission pressure plate 4 for fixing the workpiece 5 is also provided above the workpiece 5. In particular, the upper end of the positioning mandrel 8 is designed as an outer square structure, and the center of the transmission pressure plate 4 is provided with a corresponding inner square hole, so that when the positioning mandrel 8 rotates, it can transmit power to the transmission pressure plate 4, thereby driving the workpiece 5 to rotate.

[0019] Furthermore, the transmission pressure plate 4 is provided with a through hole, one end of the pin 7 passes through this through hole and contacts the tooth groove 501 of the workpiece 5, and the other end is provided with a positioning nut and contacts the upper end face of the transmission pressure plate 4 to ensure that the workpiece 5 remains stable during processing.

[0020] In addition, an upper pressure cover 6 is provided above the positioning sleeve 1. The upper end of the upper pressure cover 6 is connected to the machine tool, and the lower end is provided with a cavity so that the upper pressure cover 6 can move vertically under the drive of the machine tool, thereby applying appropriate pressure to the workpiece 5.

[0021] During operation, the upper pressure cover 6 moves downward under the drive of the machine tool. The cavity at the lower end of the upper pressure cover 6 contacts the transmission pressure plate 4 and provides downward pressure to the transmission pressure plate 4. Under the action of the transmission pressure plate 4, the workpiece 5 is in close contact with the inner cold extrusion knife 3. Then, the upper pressure cover 6 starts to rotate on the machine tool rotary table. As the machine tool spindle drives the positioning mandrel 8 to rotate, the positioning mandrel 8 drives the workpiece 5 to rotate through the action of the transmission pressure plate 4 and the pin 7. At the same time, the workpiece 5 and the inner cold extrusion knife 3 mesh and squeeze each other to achieve uniform processing of one revolution of the outer taper spline.

[0022] Work steps; The first step is for the workers to place the workpiece 5 to be processed through the positioning mandrel 8 onto the positioning sleeve 1.

[0023] In the second step, the worker places the transmission pressure plate 4 on top of the workpiece 5, ensuring that the inner square hole of the transmission pressure plate 4 matches the outer square structure at the upper end of the positioning mandrel.

[0024] The third step is to pass the pull pin 7 through the through hole on the transmission pressure plate 4, and ensure that one end of the pull pin 7 is stuck in the tooth groove 501 of the workpiece 5.

[0025] The fourth step is to start the machine tool and complete the processing of workpiece 5.

[0026] In the fifth step, after processing is completed, the upper pressure cover 6 moves upward, and the staff takes out the processed workpiece 5 to proceed with the next round of processing.

[0027] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A rotary machining assembly for machining external taper splines, comprising a positioning sleeve (1) fixed on a machine tool rotary table, characterized in that, The internal cooling extrusion cutter (3) is fixed on the positioning sleeve (1) by the tool positioning plate (2). The three are coaxially arranged. One end of the positioning mandrel (8) is set inside the machine tool rotary table, and the other end passes through the positioning sleeve (1), the tool positioning plate (2) and the internal cooling extrusion cutter (3) from bottom to top. There is an eccentricity between the center axis of the positioning mandrel (8) and the center axis of the positioning sleeve (1). The workpiece (5) is set through the positioning mandrel (8) and meshes with the internal cooling extrusion cutter (3). A transmission pressure plate (4) for fixing the workpiece (5) is also provided above it.

2. The rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The positioning sleeve (1) is also provided with an upper pressure cover (6) for providing pressure. The upper end of the upper pressure cover (6) is connected to the machine tool, and the lower end is provided with a cavity. The upper pressure cover (6) moves vertically under the drive of the machine tool.

3. A rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The transmission pressure plate (4) is provided with a through hole. One end of the pull pin (7) passes through the through hole and contacts the tooth groove (501) of the workpiece (5). The other end is provided with a positioning nut and contacts the upper surface of the transmission pressure plate (4).

4. A rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The upper end of the positioning mandrel (8) has an outer square structure, and the center of the transmission pressure plate (4) has an inner square hole corresponding to it.

5. A rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The tool positioning disc (2) is connected to the positioning sleeve (1) by a number of screws.

6. A rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The internal cooling extrusion blade (3) is connected to the blade positioning plate (2) by a number of screws.

7. A rotary machining assembly for machining external tapered splines according to claim 1, characterized in that, The positioning mandrel (8) is fixed to the machine tool spindle by a number of screws, and the positioning mandrel (8) is tapered with the machine tool spindle.

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