Gear chamfering tool and tool holder

Abstract

This utility model provides a gear chamfering cutter and tool holder, belonging to the field of gear processing technology. A gear chamfering cutter includes a cutting part and a mounting part, and the tool holder includes a wheel, a fixed base, and a tool mounting part. This utility model arranges the cutting part in a triangular pattern with cutting edges on both sides. After mounting the gear chamfering cutter on the tool mounting part on the fixed base of the wheel, and aligning the wheel's axis perpendicular to the tooth groove direction of the gear to be processed, the cutting part of the gear chamfering cutter passes through the tooth groove at the tooth end face when the wheel rotates. This allows the cutting edges on both sides of the cutting part to directly chamfer the connecting edges on the end faces of adjacent teeth from the tooth root to the tooth tip, achieving a one-time chamfering process. This improves efficiency, saves time and effort, and avoids the problem of frequent subsequent position adjustments due to easy tool wear. It is also more convenient to operate and meets the needs of large-scale gear manufacturing.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, specifically to a gear chamfering cutter and cutter holder. Background Technology

[0002] Gears, as a commonly used component in power transmission structures, transmit power through the meshing of teeth and are widely used in the equipment manufacturing field.

[0003] Currently, after gears are manufactured, the edges where the tooth tips are located are typically chamfered to reduce burrs, facilitate gear meshing, and prevent overheating and stress concentration issues during heat treatment. However, in existing gears on the market, to reduce machining steps, improve processing efficiency, and lower manufacturing costs, the chamfering of the tooth end faces is also concentrated on the edges where the tooth tips are located. The connecting edges from the tooth root to the tooth tip on each tooth end face are usually set as right angle edges without any treatment. Although this meets the gear meshing requirements, for gears that need to participate in shifting or sliding meshing, the lack of a guiding structure on the tooth end faces easily leads to interference from right angle edges, making it difficult to align during subsequent installation and use, resulting in increased assembly resistance. Furthermore, when some edges on the tooth end faces are untreated right angle edges, problems such as tooth tip chipping or burr formation are prone to occur, and the issues of stress concentration and overheating at sharp corners during heat treatment still exist, leading to cracks or fissures. Therefore, it is essential for the industry to chamfer the end faces of gear teeth. In addition, because the connecting edges on the tooth end face have different directions from the tooth root to the tooth tip, they cannot be cut directly around the circumference of the gear using a traditional chamfering cutter. They can only be ground by grinding wheels, which has problems of low efficiency and high wear, is time-consuming and labor-intensive, and requires constant adjustment of the position after the grinding wheel wears out, making the operation difficult and difficult to meet the needs of large-scale production. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention aims to provide a gear chamfering cutter and tool holder. The cutter comprises several fixed seats extending radially from the surface of a wheel. Each fixed seat has a tool mounting portion, and each tool mounting portion houses a gear chamfering cutter. The cutting portions of the gear chamfering cutter are arranged in a triangular pattern. During machining, the axis of the wheel is perpendicular to the tooth groove direction of the gear to be machined. As the wheel rotates, the cutting portion of the gear chamfering cutter passes through the tooth groove at the end face of the tooth, and the cutting edges on both sides of the cutting portion directly chamfer the connecting edges from the tooth root to the tooth tip on the end faces of adjacent teeth, completing the machining in one pass. This not only offers high efficiency and reduces wear, saving time and effort, but also avoids the need for frequent position adjustments, making operation more convenient and better meeting the needs of large-scale production.

[0005] The specific technical solution is as follows:

[0006] A gear chamfering cutter includes a mounting part and a cutting part, characterized in that the cutting part protrudes from the mounting part and the mounting part is an integral structure. The mounting part has a mounting hole. The cutting part has a triangular structure, with one edge of the cutting part connected to the mounting part and the other two edges of the cutting part being cutting edges. Both ends of the mounting part are provided with cutting parts, and the mounting part and the two cutting parts form a rhomboid structure.

[0007] In the aforementioned gear chamfering cutter, the included angle between the two cutting edges of the cutting part ranges from 20° to 35°.

[0008] In the aforementioned gear chamfering cutter, a chip-breaking groove is provided on the cutting part, the chip-breaking groove is provided on the front corner surface of the cutting part, and one side of the chip-breaking groove is connected to the cutting edge.

[0009] In the aforementioned gear chamfering cutter, the cutting groove is an annular structure surrounding the outer edges of the two cutting parts and the mounting part.

[0010] A gear chamfering cutter holder for mounting the aforementioned gear chamfering cutter is characterized by comprising a wheel, a fixed seat, and a cutter mounting part. Several protruding fixed seats are arranged radially on the wheel surface of the wheel, each fixed seat is provided with a cutter mounting part, and each cutter mounting part is mounted with a gear chamfering cutter.

[0011] In the aforementioned gear chamfering cutter holder, the tool mounting part is a recessed groove in a fixed seat. The two sides of the groove opposite to the wheel disk extend through the two sides of the fixed seat. Furthermore, the cross-section of the groove opposite to the wheel disk is arranged in a triangular shape, and the bottom dimension of the groove at the end opposite to the wheel disk is smaller than the bottom dimension of the cutting part of the gear chamfering cutter. The groove wall at the end of the groove near the wheel disk abuts against the two sides of the other cutting part of the gear chamfering cutter.

[0012] In the aforementioned gear chamfering cutter holder, a machining clearance hole is provided at the top end of the groove near the wheel disk, and the machining clearance hole is a cylindrical hole.

[0013] In the aforementioned gear chamfering cutter holder, a locking hole is provided on the fixed base at the center of the groove. When the gear chamfering cutter is installed in the tool mounting part, the mounting hole on the mounting part of the gear chamfering cutter is aligned with the locking hole of the corresponding groove, and the screw passes through the mounting hole and is threaded into the locking hole.

[0014] The aforementioned gear chamfering cutter holder further includes a liquid collection groove, which is disposed on a fixed base and located on both sides of the cutter mounting part. Each liquid collection groove extends along the wheel surface of the wheel towards the cutter mounting part, and the groove depth of the end of each liquid collection groove near the wheel is less than the groove depth of the end near the cutter mounting part.

[0015] The positive effects of the above technical solution are:

[0016] The aforementioned gear chamfering cutter and tool holder, by setting up a gear chamfering cutter including a cutting part and a mounting part, with the cutting part arranged in a triangle and connected to the mounting part, and the two sides of the cutting part used as cutting edges, and a wheel with several fixed seats, each fixed seat extending radially along the wheel and having a tool mounting part, with a gear chamfering cutter installed in each tool mounting part, during processing, only needs to be perpendicular to the direction of the tooth groove of the gear to be processed, so that when the wheel rotates, the cutting part of the gear chamfering cutter can pass through the tooth groove at the tooth end face, and the cutting edges on both sides of the cutting part directly cut and chamfer the connecting edges from the tooth root to the tooth tip on the end faces of adjacent teeth, ensuring that the chamfering can be completed in one go, which is more efficient, saves time and effort, and avoids the problem of frequent adjustment of position due to processing wear, which facilitates operation and is conducive to the large-scale production and manufacturing of gears. Attached Figure Description

[0017] Figure 1 This is a structural diagram of an embodiment of the gear chamfering cutter and cutter holder of this utility model;

[0018] Figure 2 This is a schematic diagram of a tool holder equipped with a gear chamfering cutter machining a gear in a preferred embodiment of the present invention;

[0019] Figure 3 This is a structural diagram of a gear chamfering tool according to a preferred embodiment of the present invention.

[0020] In the attached diagram: 1. Gear chamfering cutter; 11. Mounting part; 12. Cutting part; 111. Mounting hole; 121. Cutting edge; 122. Cutting break groove; 2. Tool holder; 21. Wheel disc; 22. Fixing base; 23. Tool mounting part; 221. Machining clearance hole; 222. Liquid collection groove; 3. Tooth part; 31. Tooth groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 3 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0022] Figure 1This is a structural diagram of an embodiment of the gear chamfering cutter and cutter holder of this utility model; Figure 2 This is a schematic diagram illustrating the machining of a gear by a tool holder equipped with a gear chamfering cutter in a preferred embodiment of this utility model. Figure 1 and Figure 2 As shown, the gear chamfering cutter provided in this embodiment includes a mounting part 11 and a cutting part 12; the tool holder 2 provided in this embodiment is used to mount the aforementioned gear chamfering cutter 1. At this time, the mounting part 11 and the cutting part 12 of the gear chamfering cutter 1 have the same overall structure as a conventional cutting tool. The entire gear chamfering cutter 1 is mounted through the mounting part 11, and the workpiece is cut by the cutting part 12 to achieve chamfering. Because the tool undergoes heat treatment and surface treatment, it has high hardness and is not easily worn. Therefore, the processing efficiency is high, it is not easily worn, and the problem of constantly adjusting the position during processing is avoided, making operation more convenient.

[0023] Figure 3 This is a structural diagram of a gear chamfering tool according to a preferred embodiment of the present invention. Figures 1 to 3 As shown, the cutting part 12 of the gear chamfering cutter 1 protrudes from the mounting part 11. Preferably, the cutting part 12 and the mounting part 11 are an integral structure, which has higher structural strength and better stability during processing. In this case, a mounting hole 111 is provided on the mounting part 11. During installation, a screw passes through the mounting hole 111 and connects to the tool mounting part 23 to realize the installation of the gear chamfering cutter 1. Meanwhile, the cutting part 12 has a triangular structure. One edge of the cutting part 12 is connected to the mounting part 11, and the other two edges of the cutting part 12 are cutting edges 121. This allows the cutting part 12 to correspond to the connecting edges from the root to the tip of the adjacent teeth 3 on the end face of the tooth 3 when it passes through the tooth groove 31 at the end face of the tooth 3. This enables the two cutting edges 121 of the cutting part 12 to chamfer the connecting edges from the root to the tip of the adjacent teeth 3 on the end face of the tooth 3. In other words, the chamfering operation can be completed by cutting alone, which is convenient, efficient, and saves time and effort. In addition, the mounting part 11 has cutting parts 12 at both ends, which can form a rhomboid structure. This allows the cutting part 12 at one end to be replaced by turning the machine around to perform chamfering, extending the service life of the single gear chamfering cutter 1, avoiding material waste, increasing structural utilization, and reducing operating costs.

[0024] Specifically, the included angle of the two cutting edges 121 of the cutting part 12 of the gear chamfering cutter 1 ranges from 20° to 35°. Preferably, the included angle of the two cutting edges 121 of the cutting part 12 is 25°. This satisfies the chamfering requirements of the end face of the tooth 3 of most gears on the market, while also avoiding overcutting that could affect the contact surface of the tooth groove 31. Furthermore, it allows the cutting part 12 to be relatively slender and the angle change to be relatively gentle, ensuring that the cutting edge 121 has sufficient length to adapt to the cutting changes. This avoids the problem that the chamfer at the end closer to the tooth root in the connecting edge from the tooth root to the tooth tip direction on the end face of the tooth 3 is too small compared to the chamfer at the end closer to the tooth tip during chamfering. It also makes it easier to achieve consistency at both ends of the chamfer, ensuring product quality.

[0025] More specifically, the cutting part 12 of the gear chamfering cutter 1 is provided with a chip breaking groove 122. The chip breaking groove 122 is provided on the front corner surface of the cutting part 12, and one side of the chip breaking groove 122 is connected to the cutting edge 121. This allows the cutting chips generated when the end face of the tooth 3 is chamfered by the cutting part 12 to break at the chip breaking groove 122, avoiding the problem of cutting chips wrapping around the workpiece or tool and causing damage to the workpiece and tool, thus ensuring machining safety and efficiency.

[0026] More specifically, the chip break groove 122 is an annular structure surrounding the outer edges of the two cutting parts 12 and the mounting part 11, realizing the connection of the chip break grooves 122 of the two cutting parts 12. This not only facilitates processing and manufacturing, but also allows the chip break groove 122 to better adapt when the cutting part 12 at one end is damaged and replaced with the cutting part 12 at the other end for cutting. There is no need to make specific designs on the tool holder 2, and the compatibility is better.

[0027] In addition, this embodiment also provides a tool holder for a gear chamfering cutter 1, which is used to mount the gear chamfering cutter 1. In this case, the tool holder 2 of the gear chamfering cutter 1 includes a wheel 21, a fixed seat 22, and a tool mounting part 23. Furthermore, a plurality of protruding fixed seats 22 are arranged radially on the wheel surface of the wheel 21. Preferably, the fixed seat 22 and the wheel 21 are integral structures, which can be directly cast, resulting in higher structural strength, stronger load-bearing capacity, and easier processing. In this case, each fixed seat 22 is provided with a tool mounting part 23, and each tool mounting part 23 is equipped with a gear chamfering cutter 1. That is, the tool mounting part 23 provides a mounting carrier for the gear chamfering cutter 1, ensuring that when the wheel 21 rotates, the wheel 21 can drive the gear chamfering cutter 1 to rotate, so that the gear chamfering cutter 1 passes through the end face of the tooth 3 in sequence, thereby realizing the cutting chamfering of the end face of the tooth 3.

[0028] More specifically, the tool mounting part 23 is a recessed groove in the fixed seat 22. The two sides of the groove opposite to the wheel 21 extend through the two sides of the fixed seat 22, so that the two sides of the groove opposite to the wheel 21 are unobstructed. Only the bottom of the groove provides bottom support for the cutting part 12 of the gear chamfering cutter 1. Furthermore, the cross-section of the groove opposite to the wheel 21 is triangular, and the bottom dimension of the groove opposite to the wheel 21 is smaller than the bottom dimension of the cutting part 12 of the gear chamfering cutter 1. This allows the two sides of the cutting part 12 of the gear chamfering cutter 1 installed in the tool mounting part 23 to protrude from the fixed seat 22, so as not to interfere with the cutting edges 121 on both sides of the cutting part 12, ensuring that the chamfering cutting can be carried out smoothly. It is worth noting that the groove wall at one end of the groove near the wheel 21 abuts against both sides of the other cutting part 12 of the gear chamfering cutter 1. That is, the groove wall of the groove provides a limiting support for the installation of the gear chamfering cutter 1, which improves the installation stability of the gear chamfering cutter 1 and makes the structural design more reasonable.

[0029] More specifically, a machining clearance hole 221 is provided at the top of one end of the disc 21 near the groove. The machining clearance hole 221 is a cylindrical hole, which can be directly machined by tools such as drill bits, making machining more convenient. At the same time, the machining clearance hole 221 facilitates the corner clearing operation of the tip of the groove, avoiding the problem that the tool cannot machine the tip of the groove, and ensuring smooth machining.

[0030] More specifically, a locking hole is provided on the fixing seat 22 at the center of the groove, and when the gear chamfering cutter 1 is installed in the tool mounting part 23, the mounting hole 111 on the mounting part 11 of the gear chamfering cutter 1 is aligned with the locking hole of the corresponding groove, and the screw passes through the mounting hole 111 and is threaded into the locking hole, thus realizing the installation of the gear chamfering cutter 1 on the corresponding tool mounting part 23.

[0031] More specifically, the mounting base 22 is provided with liquid collection tanks 222 on both sides of the tool mounting section 23. Each liquid collection tank 222 extends along the wheel surface of the wheel 21 towards the tool mounting section 23. This allows cutting fluid splashed onto the gear chamfering cutter 1 during subsequent machining to be collected and channeled to the tool mounting section 23 via the liquid collection tanks 222, thus collecting and reusing the wasted cutting fluid. It is worth noting that because the mounting base 22 rotates at high speed with the wheel 21, the cutting fluid entering the liquid collection tanks 222 flows towards the tool mounting section 23 under centrifugal force, thereby lubricating and cooling the gear chamfering cutter 1 mounted in the tool mounting section 23 and extending its service life. Furthermore, the depth of each fluid collection tank 222 near the end of the wheel 21 is less than the depth of the end near the tool mounting part 23. This ensures that when the fluid in the collection tank 222 flows under centrifugal force, it will not flow out of the collection tank 222 before reaching the tool mounting part 23. This ensures that more cutting fluid in the collection tank 222 can act on the gear chamfering cutter 1 in the tool mounting part 23, resulting in a more rational structural design. In addition, several branch grooves can still be provided on the wheel surface of the wheel 21. These branch grooves are distributed in a tree-like manner at one end of the collection tank 222 and are connected to the collection tank 222. Through the branch grooves, the cutting fluid splashed on the wheel surface of the wheel 21 can be efficiently collected into the collection tank 222, resulting in a more rational structural design.

[0032] The gear chamfering cutter and tool holder provided in this embodiment include a gear chamfering cutter 1 comprising a cutting part 12 and a mounting part 11, and a tool holder 2 comprising a wheel 21, a fixed base 22, and a tool mounting part 23. By arranging the cutting part 12 in a triangular shape with cutting edges 121 on both sides, after mounting the gear chamfering cutter 1 on the tool mounting part 23 on the fixed base 22 of the wheel 21, and aligning the axis of the wheel 21 perpendicular to the tooth groove 31 of the gear to be processed, the cutting part 12 of the gear chamfering cutter 1 can pass through the tooth groove 31 at the end face of the tooth 3 when the wheel 21 rotates. This allows the cutting edges 121 on both sides of the cutting part 12 to directly chamfer the connecting edges from the tooth root to the tooth tip on the end faces of two adjacent teeth 3, achieving one-time chamfering processing. This improves efficiency, saves time and effort, and avoids the problem of frequent subsequent position adjustments due to easy wear of processing tools. The operation is more convenient and meets the needs of large-scale gear manufacturing.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear chamfering cutter, comprising a mounting portion and a cutting portion, characterized in that, The cutting part is protruding from the mounting part, and the cutting part and the mounting part are an integral structure. The mounting part has a mounting hole. The cutting part is a triangular structure, with one edge of the cutting part connected to the mounting part and the other two edges of the cutting part being cutting edges. The two ends of the mounting part are provided with the cutting part, and the mounting part and the two cutting parts form a rhomboid structure.

2. The gear chamfering cutter according to claim 1, characterized in that, The included angle between the two cutting edges of the cutting part is in the range of 20-35°.

3. The gear chamfering cutter according to claim 1, characterized in that, The cutting part is provided with a chip-breaking groove, which is located on the front corner surface of the cutting part, and one side of the chip-breaking groove is connected to the cutting edge.

4. The gear chamfering cutter according to claim 3, characterized in that, The chip-breaking groove is an annular structure surrounding the outer edges of the two cutting portions and the mounting portion.

5. A tool holder for a gear chamfering cutter, used for mounting the gear chamfering cutter according to any one of claims 1-4, characterized in that, It includes a wheel, a fixed seat, and a tool mounting part. Several protruding fixed seats are arranged radially on the wheel surface of the wheel. Each fixed seat is provided with a tool mounting part, and each tool mounting part is equipped with a gear chamfering tool.

6. The tool holder of the gear chamfering cutter according to claim 5, characterized in that, The tool mounting part is a recessed groove into the fixed seat. The two sides of the groove opposite to the wheel disk extend through the two sides of the fixed seat. The cross-section of the groove opposite to the wheel disk is triangular. The bottom dimension of the groove opposite to the wheel disk is smaller than the bottom dimension of the cutting part of the gear chamfering tool. The groove wall at the end of the groove near the wheel disk abuts against the two sides of the other cutting part of the gear chamfering tool.

7. The tool holder of the gear chamfering cutter according to claim 6, characterized in that, The top end of the groove near the wheel is provided with a machining clearance hole, and the machining clearance hole is a cylindrical hole.

8. The tool holder of the gear chamfering cutter according to claim 6, characterized in that, A locking hole is provided on the fixed base and located at the center of the groove. When the gear chamfering cutter is installed in the cutter mounting part, the mounting hole on the mounting part of the gear chamfering cutter is aligned with the locking hole corresponding to the groove, and the screw passes through the mounting hole and is threaded into the locking hole.

9. The tool holder of the gear chamfering cutter according to claim 6, characterized in that, It also includes a liquid collection tank, which is disposed on the fixed base and located on both sides of the tool mounting part. Each liquid collection tank extends along the wheel surface of the wheel towards the tool mounting part, and the depth of the end of each liquid collection tank near the wheel is less than the depth of the end near the tool mounting part.

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