Arc end face internal tooth shaping machining clamping fixture

Abstract

The utility model provides a clamping fixture for gear shaping machining of internal teeth on an arc end face. The clamping fixture is composed of a base, a pressing ring and a pressing bolt. The base and the gear shaping machine are fixedly connected into a whole; the base is provided with a positioning groove, the positioning groove is provided with a positioning arc surface, and the positioning arc surface is matched with a machined gear and used for concentrically positioning the outer circle outline of the machined gear; the gear to be machined is pressed through the pressing ring; and the compression ring is fastened and connected with the base into a whole through a compression bolt. The gear shaping machine solves the technical problem of how to improve the gear shaping machining efficiency and quality of the inner gear with the circular-arc gear of the harmonic reducer, is small in part number, easy and convenient to operate, high in machining precision, high in efficiency, stable and reliable in quality and capable of enabling workers to operate according to standard requirements after being simply trained, and saves production cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of accessories or devices that combine operation and transportation with gear cutting machines, specifically relating to a clamping fixture for machining internal gears on an arc end face, especially for clamping and positioning machining of harmonic reducer gears. Background Technology

[0002] Gear transmission is a common type of mechanical transmission, widely used and maintaining its important position in electronics, aviation and marine engineering, instrumentation, automation control, and precision radar optical instruments.

[0003] Taking the gear transmission of a harmonic reducer as an example, gear shaping is one of the gear machining methods. The internal gears of harmonic reducer gears are generally machined using gear shaping. The machining method for internal gears involves three steps: clamping the part, aligning the addendum circle, and gear shaping. In the gear shaping stage, the most important aspects are the clamping method and alignment. Gear shaping, based on automated high-precision CNC equipment, has reduced reliance on manual labor, so the correct clamping method plays a crucial role in the quality of gear shaping. For machining such as... Figure 1 For the gear with a curved end face shown, the traditional machining method is to first finish-machine the end face to a flat surface, and then finish-machine the curved end face again after gear shaping. However, this machining method is cumbersome and time-consuming, and is not suitable for modern production processes. Therefore, it is necessary to improve the clamping fixture to ensure that the finish machining and gear shaping are completed in one go, improving efficiency while ensuring quality. The following technical solution is proposed for this purpose. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a clamping fixture for machining internal gears on an arc end face. By designing a simple and high-precision tooling for gear machining, this invention solves the technical problem of how to improve the efficiency and quality of machining internal gears in harmonic reducers.

[0005] The technical solution adopted in this utility model is as follows: a clamping fixture for machining internal gears with arc end faces, comprising a base, a pressure ring, and a clamping bolt; the base is fixedly connected to the gear shaping machine; the base has a positioning groove, and the positioning groove has a positioning arc surface, which is adapted to the gear being machined, and the positioning arc surface is used to concentrically position the outer circle contour of the gear being machined; the gear being machined is clamped by the pressure ring; the pressure ring is fixedly connected to the base by the clamping bolt.

[0006] In the above technical solution, as a further improvement of this utility model: the pressing end face of the pressure ring is provided with a stop, and the stop is positioned and pressed to fit the edge of the end face of the gear shaft being processed.

[0007] The above technical solution, as a further improvement of this utility model, also includes a positioning through hole, which is made at the center of the base; the positioning through hole is concentrically positioned and inserted into the gear being processed.

[0008] In the above technical solution, the preferred technical solution of this utility model is as follows: the pressure ring disc body is radially provided with a number of pressure ring through holes, and the base disc body is radially provided with a number of base screw holes. The base screw holes and the pressure ring through holes are concentrically matched and adapted one by one. After the clamping bolt passes through the pressure ring through hole, it screws into the base screw hole to concentrically fasten the pressure ring and the base into one piece.

[0009] In the above technical solution, the preferred technical solution of this utility model is that the runout of the base and the gear being processed by dial gauge is within 0.005mm.

[0010] In the above technical solutions, the preferred technical solution of this utility model is that the base is a cylindrical structure.

[0011] In the above technical solutions, the preferred technical solution of this utility model is: the base is provided with ear plates.

[0012] The advantages of this utility model compared with the prior art are: the fixture of this utility model has fewer parts, is easy to operate, has high processing accuracy, and workers can be put to work after simple training and according to the standard requirements. It is convenient to change gears. Each time the gear to be processed is changed, only the pressure ring and the self-made clamping bolt need to be removed. After changing the gear and checking the dial indicator, the pressure ring can be tightened again to complete the process. The processing accuracy of the gear is guaranteed to be within grade 7, which meets the processing requirements. The processing efficiency is high, the quality is stable and reliable, and the production cost is saved. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the gear structure being machined;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention for clamping the gear being processed;

[0015] In the diagram: 1-base, 101-positioning groove, 102-positioning through hole, 2-machined gear, 3-pressure ring, 301-stop, 4-clamping bolt. Detailed Implementation

[0016] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] A clamping fixture for machining internal teeth on an arc-shaped end face (such as...) Figure 2(As shown) It consists of a base 1, a pressure ring 3, and a clamping bolt 4. The fixture of this utility model has simplified components, with only three types, so it is relatively easy to operate and has relatively low processing costs.

[0018] The base 1 is fixedly connected to the gear shaping machine; after the gear shaping machine is assembled, the runout of the base 1 is controlled within 0.005mm by dial gauge calibration, which meets the accuracy requirements of the workpiece being processed.

[0019] Preferably, the base 1 is a cylindrical structure. The cylindrical design offers high stability, enabling it to withstand greater loads and ensuring stability during processing, thus contributing to improved processing accuracy. The cylindrical base design is compact, occupies a small area, and can be adapted to smaller workspaces, improving space utilization.

[0020] Preferably, the base 1 is provided with ear plates. The ear plate design provides additional connection points, facilitating the secure connection of the fixture to the gear hobbing machine or other auxiliary equipment via bolts, nuts, etc., ensuring stability and safety during processing. Furthermore, the ear plate increases the structural strength of the base, enabling it to withstand greater processing forces and vibrations, thus improving the durability and service life of the fixture. The ear plate also serves as a leverage point for handling and installation, facilitating the movement and installation of the fixture by operators.

[0021] The base 1 has a positioning groove 101, and the positioning groove 101 has a positioning arc surface, which is aligned with... Figure 1 The outer circle of the gear 2 being machined is positioned and fitted, and the positioning arc surface is used to concentrically position the outer circle contour of the gear 2 being machined. The positioning groove 101 on the positioning arc surface reduces the difficulty of assembling and positioning the gear 2 being machined, reduces the difficulty of changing parts, and improves the processing efficiency.

[0022] The gear 2 being processed is pressed by a pressure ring 3; the pressure ring 3 is fastened to the base 1 as a whole by a clamping bolt 4. That is, after the gear 2 being processed is assembled, it is only necessary to press the pressure ring 3 and then tighten the clamping bolt 4 to complete the assembly of the gear 2 being processed.

[0023] In the above embodiments, as a further improved embodiment of the present invention: the pressing end face of the pressure ring 3 is provided with a stop 301, which is positioned and pressed into fit with the edge of the shaft end face of the gear 2 being processed. By adding the stop 301, the positioning difficulty of the pressure ring 3 is reduced, thereby improving the assembly accuracy of the pressure ring 3 and the base 1, while ensuring the positioning accuracy of the gear 2 being processed.

[0024] In the above embodiments, as a further improved embodiment of the present invention, a positioning through hole 102 is further included, which is formed at the center of the base 1; the positioning through hole 102 is concentrically positioned and fitted with the gear 2 being processed. The positioning through hole 102 reduces the axial length of the clamping fixture on the one hand, and works in conjunction with the positioning groove 101 on the other hand to ensure the concentric positioning accuracy of the gear 2 being processed.

[0025] In the above embodiments, as a preferred embodiment of this utility model: the pressure ring 3 has a plurality of pressure ring through holes radially formed on its disc body, and the base 1 has a plurality of base screw holes radially formed on its disc body. The base screw holes correspond one-to-one with the pressure ring through holes and are concentrically fitted. The clamping bolt 4 passes through the pressure ring through holes and then screws into the base screw holes to concentrically and securely connect the pressure ring 3 and the base 1 into one unit. That is, the positioning and clamping of the pressure ring 3 and the base 1 can be completed by simply tightening the clamping bolt 4.

[0026] In the above embodiments, as a preferred embodiment of this utility model, the runout of both the base 1 and the gear 2 being machined is within 0.005mm according to dial indicator calibration. The machining accuracy of the gear is guaranteed to be within grade 7. This runout control is a crucial step in ensuring machining accuracy. Simultaneously, ensuring the accuracy of the machined gear is within grade 7 is also an important indicator for measuring machining quality and performance. This helps ensure high precision and high quality in gear machining, meeting the performance requirements of various transmission systems.

[0027] The working principle of this utility model is as follows: (e.g.) Figure 2 As shown, the base 1 is mounted on the gear shaper; the gear 2 to be processed is mounted on the base 1 via outer circle positioning; the pressure ring 3 is positioned on the gear 2 via stop 301; the self-made clamping bolt 4 passes through the pressure ring through hole of the pressure ring 3 and is then tightened to the base 1 to complete the positioning and clamping of the gear 2 to be processed. It should be noted that before using this fixture, the base 1 and the gear 2 to be processed should be calibrated, with the runout within 0.005mm. Then, each time the gear 2 to be processed is replaced, simple calibration can be performed to improve processing efficiency and ensure processing quality.

[0028] As can be seen from the above description, this utility model fixture has few parts, is easy to operate, has high processing accuracy, and can be operated by workers after simple training and in accordance with the specifications. It is convenient to change gears. Each time the gear 2 being processed is changed, only the pressure ring 3 and the self-made clamping bolt 4 need to be removed. After changing the gear and checking the dial indicator, the pressure ring 3 can be tightened again to complete the process. The processing accuracy of the gear is guaranteed to be within grade 7, which meets the processing requirements. The processing efficiency is high, the quality is stable and reliable, and the production cost is saved.

[0029] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications and equivalent substitutions made within the spirit and principles of the present utility model are included within the scope of protection of the present utility model.

Claims

1. A clamping fixture for machining internal teeth on an arc-shaped end face, characterized in that: The utility model discloses a gear machining device, which is composed of a base (1), a pressing ring (3) and a pressing bolt (4), wherein the base (1) is integrally connected with a gear shaping machine; the base (1) is provided with a positioning groove (101), and the positioning groove (101) is provided with a positioning arc surface, which is matched with a machined gear (2) and is used for concentric positioning the outer contour of the machined gear (2); the machined gear (2) is pressed by the pressing ring (3); the pressing ring (3) is integrally connected with the base (1) by the pressing bolt (4).

2. The arcuate end face internal tooth gear shaping clamping fixture according to claim 1, characterized in that: The pressing end surface of the pressing ring (3) is provided with a stop (301), which is matched with the edge of the axial end surface of the machined gear (2) for positioning and pressing.

3. The clamping fixture for gear shaping of circular-arc end-surface internal teeth according to claim 1 or 2, characterized in that: The base (1) is further provided with a positioning through hole (102) in the center, which is matched with the machined gear (2) for concentric positioning and inserting.

4. The arcuate end face internal tooth gear shaping fixture according to claim 1, characterized in that: The pressing ring (3) is radially provided with a plurality of pressing ring through holes, and the base (1) is radially provided with a plurality of base screw holes, which are matched with the pressing ring through holes in pairs and concentrically, and the pressing bolt (4) is screwed into the base screw hole after passing through the pressing ring through hole, so that the pressing ring (3) and the base (1) are integrally connected and fastened in a concentric manner.

5. The arcuate end face internal tooth gear shaping fixture according to claim 1, characterized in that: The runout of the base (1) and the machined gear (2) after dial calibration is within 0.005 mm.

6. The arcuate end face internal tooth gear shaping fixture according to claim 1, characterized in that: The base (1) is in a cylindrical structure.

7. The arcuate end surface internal tooth gear shaping fixture according to claim 1 or 6, wherein: The base (1) is provided with an ear plate.

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