A clamping tool for positioning in gear shaping
Patent Information
- Application Number
- CN202522332034.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-04
AI Technical Summary
[0005]为了弥补以上不足，本实用新型提供了一种用于插齿加工定位的装夹工装，旨在改善现有技术中部分用于插齿加工定位的装夹工装定位不准和装夹易受影响的问题
1、本实用新型中，通过定位机构的锥面自定心保证同轴度，装夹组件涨紧定位确保工件与安装柱同轴，装夹时橡胶环能缓冲扩张套扩张应力，弹簧可吸收螺母拧紧的过盈压力，同时弹簧在插齿加工振动时发挥减震作用，减少振动对加工的影响，保障加工过程稳定可靠，提升生产效率。
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Figure CN224866486U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear machining tooling technology, and in particular to a clamping tooling for positioning in gear shaping. Background Technology
[0002] Clamping fixtures are devices used in machining to position and clamp workpieces. They can fix the position of the workpiece, prevent displacement, and ensure machining accuracy. For gear hobbing, positioning and clamping fixtures must ensure accurate positioning and stable clamping of the workpiece, determine the relative position of the workpiece and the gear hobbing cutter, prevent displacement during machining, and ensure the accuracy of tooth pitch, tooth profile, etc.
[0003] In the existing technology, some positioning and clamping fixtures first rely on positioning elements to determine the precise relative position of the workpiece and the gear hobbing cutter, and then apply force through the clamping mechanism to fix the workpiece, limit its displacement, ensure the accuracy of tooth pitch and tooth profile during gear hobbing, and ensure stable processing.
[0004] In the existing technology, some clamping fixtures used for positioning in gear hobbing are difficult to guarantee coaxiality during positioning, the workpiece is easily damaged due to rigid contact or excessive clamping force, and vibration during processing affects the stability of processing, resulting in low product accuracy, high scrap rate and poor production efficiency. Therefore, a clamping fixture for positioning in gear hobbing is proposed to solve the above problems. Summary of the Invention
[0005] To overcome the above shortcomings, this utility model provides a clamping fixture for positioning in gear hobbing, aiming to improve the problems of inaccurate positioning and easy interference in clamping of some existing clamping fixtures used for positioning in gear hobbing.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a clamping fixture for positioning gear hobbing, comprising a reference flange, a support mechanism fixedly connected to the top of the reference flange, a positioning mechanism threadedly connected to the inside of the support mechanism, four threaded holes and four positioning grooves inside the reference flange. The positioning mechanism includes a bolt rod, the external thread of which is connected to the inner side of the support mechanism. A positioning cone is fixedly connected to the bottom of the bolt rod, the outer side of which is in contact with the inner side of the support mechanism. A mounting column is fixedly connected to the top of the bolt rod, a clamping assembly is fixedly connected to the outer side of the mounting column, and a buffer assembly is slidably connected to the outer side of the mounting column. As a further description of the above technical solution: the clamping assembly includes a support ring, the inside of which is fixedly connected to the outside of the mounting post, the bottom of which is fixedly connected to the top of the bolt rod, and a guide cone is fixedly connected to the outside of the mounting post; As a further description of the above technical solution: the bottom of the guide cone is fixedly connected to the top of the support ring, an expansion sleeve is sleeved on the outside of the guide cone, and a nut is threadedly connected to the threaded section at the top of the mounting column. As a further description of the above technical solution: the buffer assembly includes a rubber ring, the inside of which is slidably connected to the outside of the mounting post, the bottom of the rubber ring is in contact with the top of the expansion sleeve, and four fixing blocks are fixedly connected to the top of the rubber ring; As a further description of the above technical solution: pressure washers are slidably connected to the outside of the four fixed blocks, the top of the pressure washers is in contact with the bottom of the nuts, two springs are fixedly connected in the bottom groove of the pressure washers, and shock-absorbing pressure plates are fixedly connected to the ends of the two springs, the bottom of the shock-absorbing pressure plates is in contact with the top of the fixed blocks; As a further description of the above technical solution: the support mechanism includes a trapezoidal reinforcing rib, the bottom of which is fixedly connected to the top of the reference flange, and a support connection assembly is fixedly connected to the top of the reference flange; As a further description of the above technical solution: the support connection assembly includes a support sleeve, the bottom of which is fixedly connected to the top of the reference flange, the inner side of the trapezoidal reinforcing rib is fixedly connected to the bottom of the outer side of the support sleeve, the inner side of the support sleeve is threadedly connected to the outside of the bolt rod, and the outside of the positioning cone is in contact with the bottom of the inner side of the support sleeve. As a further description of the above technical solution: the support sleeve has two through holes on its outer side, and the inner side of the through holes is threaded with a connecting bolt, and the outer side of the connecting bolt is slidably connected in the outer insertion hole of the bolt rod.
[0007] This utility model has the following beneficial effects: 1. In this utility model, the conical surface of the positioning mechanism ensures coaxiality through self-centering, and the clamping assembly tightens and positions to ensure that the workpiece and the mounting column are coaxial. During clamping, the rubber ring can buffer the expansion stress of the expansion sleeve, and the spring can absorb the interference pressure of the nut tightening. At the same time, the spring plays a damping role when the gear hobbing process vibrates, reducing the impact of vibration on the processing, ensuring the stability and reliability of the processing, and improving production efficiency.
[0008] 2. In this utility model, the tooling and machine tool are precisely connected by the positioning groove of the reference flange and the positioning pin of the machine tool and the threaded hole. The triangular stable structure of the support mechanism enhances the resistance to deformation. The double fixing prevents the positioning mechanism from moving. The multi-link coordination avoids the workpiece from shifting, ensures the accuracy of tooth pitch and tooth profile, and improves the consistency of products in the same batch. Attached Figure Description
[0009] Figure 1This is a three-dimensional schematic diagram of a clamping fixture for positioning in gear hobbing according to the present invention. Figure 2 This is a schematic diagram of the pressure washer of a clamping fixture for positioning in gear hobbing according to the present invention. Figure 3 This is a schematic diagram of the guide cone of a clamping fixture for positioning in gear hobbing according to the present invention. Figure 4 This is a schematic diagram of the support sleeve of a clamping fixture for positioning in gear hobbing, as proposed in this utility model.
[0010] Legend: 1. Reference flange; 2. Supporting structure; 21. Trapezoidal reinforcing rib; 22. Support connection assembly; 221. Support sleeve; 222. Through hole; 223. Connecting bolt; 3. Positioning mechanism; 31. Bolt rod; 32. Clamping assembly; 321. Support ring; 322. Guide cone; 323. Expansion sleeve; 324. Nut; 33. Buffer assembly; 331. Rubber ring; 332. Fixing block; 333. Pressure washer; 334. Spring; 335. Shock-absorbing pressure plate; 34. Positioning cone; 35. Mounting column; 4. Threaded hole; 5. Locating groove. Detailed Implementation
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0012] A clamping fixture for positioning in gear hobbing, as shown in the reference. Figures 1 to 3The fixture includes a reference flange 1, which is a circular metal plate structure used to support the various components of the tooling. A support mechanism 2 is fixedly connected to the top of the reference flange 1. The support mechanism 2 provides stable support for the positioning mechanism 3 and prevents it from shaking during processing. The positioning mechanism 3 is threadedly connected inside the support mechanism 2. The positioning mechanism 3 is used to achieve precise positioning of the workpiece and adjust the clamping height. The reference flange 1 has four threaded holes 4 inside, which are evenly distributed in a ring and used to connect and fix the tooling with machine tool bolts. The reference flange 1 also has four positioning grooves 5 inside, which are adapted to the machine tool positioning pins and used to calibrate the circumferential position of the tooling. The positioning mechanism 3 includes a bolt rod 31, which is a cylindrical structure with external threads and can be adjusted axially. The bolt rod 31 is externally threaded and connected to the inner side of the support mechanism 2. The bottom of the bolt rod 31 is fixedly connected to a positioning cone 34. The positioning cone 34 is a cone-shaped structure with a larger top and a smaller bottom and has a self-centering function. The outside of the positioning cone 34 is in contact with the inside of the support mechanism 2. The positioning cone 34 and the support mechanism 2 cooperate to ensure the coaxiality of the bolt rod 31. The top of the bolt rod 31 is fixedly connected to a mounting column 35. The mounting column 35 is cylindrical and is used to assemble the clamping assembly 32 and carry the workpiece. The outside of the mounting column 35 is fixedly connected to the clamping assembly 32. The clamping assembly 32 is used to tighten and fix the workpiece and ensure the coaxiality of the workpiece. The outside of the mounting column 35 is slidably connected to a buffer assembly 33. The buffer assembly 33 is used to absorb clamping force and processing vibration and protect the workpiece. Specifically, the circular metal plate of the reference flange 1 first supports the entire component. The four evenly distributed annular threaded holes 4 inside are connected to the machine tool bolts to fix the fixture. The four positioning grooves 5 are matched with the machine tool positioning pins to calibrate the circumferential position and ensure the overall positioning of the fixture is accurate. The support mechanism 2 at the top of the reference flange 1 provides stable support for the positioning mechanism 3 to avoid machining wobbling. The bolt rod 31 of the positioning mechanism 3 is threadedly connected to the inner side of the support mechanism 2. The positioning cone 34 at the bottom of the bolt rod 31, which is larger at the top and smaller at the bottom, contacts the inner side of the support mechanism 2. The self-centering function ensures the coaxiality of the bolt rod 31. The cylindrical mounting column 35 at the top is also accurately positioned. After the workpiece is put in place, the nut 324 on the threaded section at the top of the mounting column 35 is tightened, which pushes the buffer assembly 33 downward. This causes the expansion sleeve 323 of the clamping assembly 32 to expand radially under the pressure of the guide cone 322, so that the workpiece is tightened and ensured to be coaxial with the mounting column 35. The buffer assembly 33 absorbs excess clamping force and reduces machining vibration. All structures work together to achieve accurate and stable clamping of the workpiece.
[0013] The clamping assembly 32 includes a support ring 321, which is annular and used to fix the guide cone 322. The inside of the support ring 321 is fixedly connected to the outside of the mounting post 35, and the bottom of the support ring 321 is fixedly connected to the top of the bolt rod 31. The support ring 321 can enhance the connection strength between the mounting post 35 and the bolt rod 31. The outside of the mounting post 35 is fixedly connected to the guide cone 322, which is conical and used to compress the expansion sleeve 323. The bottom of the guide cone 322 is fixed. Connected to the top of the support ring 321, an expansion sleeve 323 is fitted around the guide cone 322. The expansion sleeve 323 is an elastically deformable annular structure that can radially expand and tighten the workpiece. A nut 324 is threadedly connected to the threaded section at the top of the mounting post 35. The nut 324 can apply downward pressure to push the buffer assembly 33 and cause the expansion sleeve 323 to expand. The buffer assembly 33 includes a rubber ring 331, which is elastic and can buffer the radial stress of the expansion sleeve 323. The rubber ring 331 has an internal sliding connection. Outside the mounting post 35, a rubber ring 331 can slide axially along the mounting post 35. The bottom of the rubber ring 331 contacts the top of the expansion sleeve 323. The rubber ring 331 can prevent the expansion sleeve 323 from rigidly colliding with the buffer assembly 33. Four fixing blocks 332 are fixedly connected to the top of the rubber ring 331. The fixing blocks 332 are evenly distributed in a ring and are used to limit the pressure washer 333. Pressure washers 333 are slidably connected to the outside of the four fixing blocks 332. The pressure washers 333 are circular and can press the nut 324. The force is transmitted to the spring 334. The top of the pressure washer 333 contacts the bottom of the nut 324. Two springs 334 are fixedly connected in the bottom groove of the pressure washer 333. The springs 334 are elastic and can absorb the interference clamping force. The ends of the two springs 334 are fixedly connected to the shock-absorbing plate 335. The shock-absorbing plate 335 is circular and is used to evenly transmit the elastic force of the springs 334. The bottom of the shock-absorbing plate 335 contacts the top of the fixing block 332. The position of the shock-absorbing plate 335 can be adjusted with the extension and retraction of the springs 334. Specifically, the clamping assembly 32 and the buffer assembly 33 work together to achieve stable workpiece clamping. The support ring 321 is internally connected to the mounting post 35 and the lower connecting bolt rod 31, which not only fixes the guide cone 322 but also enhances the connection strength between the two. The guide cone 322 is fixed to the top of the support ring 321 and is externally fitted with an elastically deformable expansion sleeve 323. When the nut 324 on the top of the mounting post 35 is tightened, the nut 324 applies downward pressure, pushing the pressure washer 333 downward. The pressure washer 333 moves along the four annularly distributed fixing blocks 332. The sliding motion transmits pressure to the spring 334, which deforms under pressure, causing the damping plate 335 to move downward and contact the fixed block 332. At the same time, the pressure washer 333 moves downward and pushes the rubber ring 331 to slide axially along the mounting post 35. The bottom of the rubber ring 331 squeezes the expansion sleeve 323, causing the expansion sleeve 323 to expand radially under the action of the conical surface of the guide cone 322, thus tightening the workpiece. The rubber ring 331 buffers the expansion stress to avoid rigid collisions, and the spring 334 absorbs the interference clamping force, together ensuring the stability of the clamping.
[0014] Reference Figure 1 and Figure 4 The support mechanism 2 includes a trapezoidal reinforcing rib 21, which is a trapezoidal metal plate used to enhance the deformation resistance of the support sleeve 221. The bottom of the trapezoidal reinforcing rib 21 is fixedly connected to the top of the reference flange 1. A support connection assembly 22 is fixedly connected to the top of the reference flange 1. The support connection assembly 22 is used to connect the reference flange 1 and the positioning mechanism 3. The support connection assembly 22 includes a support sleeve 221, which is a cylindrical structure with internal threads used to assemble bolt rods 31. The bottom of the support sleeve 221 is fixedly connected to the top of the reference flange 1, and the inner side of the trapezoidal reinforcing rib 21 is fixedly connected to the outer bottom of the support sleeve 221. The trapezoidal reinforcing rib 21 and the support sleeve 221 cooperate to form a triangular stable structure. The inner thread of the support sleeve 221 is connected to the outside of the bolt rod 31. The support sleeve 221 is threaded with the bolt rod 31 to adjust the height of the positioning mechanism 3. The outside of the positioning cone 34 is in contact with the bottom of the inner side of the support sleeve 221. The bottom of the inner side of the support sleeve 221 is a tapered surface and is adapted to the positioning cone 34. Two through holes 222 are opened on the outside of the support sleeve 221. The through holes 222 are symmetrically distributed and used to insert the connecting bolt 223. The inner thread of the through holes 222 is connected to the connecting bolt 223. The connecting bolt 223 is used to lock the position of the bolt rod 31 to prevent its axial movement. The outside of the connecting bolt 223 is slidably connected in the outer insertion hole of the bolt rod 31. The connection between the connecting bolt 223 and the insertion hole can enhance the connection stability between the positioning mechanism 3 and the support sleeve 221. Specifically, the support mechanism 2 provides stable support as the positioning mechanism 3 through the coordinated operation of multiple components. The bottom of the trapezoidal reinforcing rib 21 is fixed to the top of the reference flange 1, and its inner side is connected to the bottom of the outer side of the support sleeve 221, forming a triangular stable structure to enhance the deformation resistance of the support sleeve 221. The bottom of the support sleeve 221 is fixed to the reference flange 1, and its inner side is threadedly connected to the bolt rod 31. Rotating the bolt rod 31 can adjust the height of the positioning mechanism 3. After adjustment, the positioning cone 34 at the bottom of the bolt rod 31 fits with the conical surface at the bottom of the inner side of the support sleeve 221. Precise centering is achieved by using the conical surface to cooperate. The connecting bolt 223 is inserted into the symmetrical through hole 222 on the outside of the support sleeve 221. After tightening, the connecting bolt 223 is inserted into the external insertion hole of the bolt rod 31 to lock the position of the bolt rod 31 to prevent axial movement, further enhancing the connection stability between the positioning mechanism 3 and the support sleeve 221, and ensuring that the support structure does not shake during processing.
[0015] The implementation principle of this application embodiment is as follows: First, the four positioning grooves 5 inside the reference flange 1 cooperate with the corresponding positioning pins of the machine tool to ensure the accurate relative position of the tooling and the machine tool, avoid circumferential offset of the tooling, and lay the foundation for subsequent workpiece positioning. Using the four threaded holes 4 inside the reference flange 1, the reference flange 1 is fixed to the designated position of the gear hobbing machine with bolts. The support connection component 22 in the support mechanism 2 takes the support sleeve 221 as the core. The bottom of the support sleeve 221 is fixedly connected to the top of the reference flange 1, and the outer bottom is fixed to the top of the reference flange 1 through the trapezoidal reinforcing rib 21 to form a triangular stable structure, which enhances the deformation resistance of the support sleeve 221. When the positioning mechanism 3 is assembled, the inner side of the support sleeve 221 is threadedly connected to the outer side of the bolt rod 31. At the same time, the connecting bolt 223 inside the through hole 222 is inserted into the outer insertion hole of the bolt rod 31 to achieve double fixation of the support sleeve 221 and the bolt rod 31, preventing the positioning mechanism 3 from axial movement during the processing. The positioning mechanism 3 is threaded with the outside of the bolt rod 31 and the inside of the support sleeve 221. Rotating the bolt rod 31 can adjust its axial position within the support sleeve 221. When the bolt rod 31 is adjusted to the designated position, the outside of its bottom positioning cone 34 is in close contact with the bottom of the inner side of the support sleeve 221. At the same time, the top of the bolt rod 31 is fixedly connected to the mounting column 35. The mounting column 35, as the core carrier for workpiece clamping, achieves precise positioning with the bolt rod 31. The clamping assembly 32 achieves workpiece tensioning through the guide cone 322 and the expansion sleeve 323. After the inner hole of the workpiece is fitted onto the outside of the expansion sleeve 323, the nut 324 on the top threaded section of the mounting column 35 is rotated, and the nut 324 applies downward pressure. At this time, the guide cone 322 is fixed to the top of the support ring 321, inside the support ring 321 and outside the mounting column 35, and at the bottom and top of the bolt rod 31. Its outer cone surface mates with the inner cone surface of the expansion sleeve 323. Under the pressure of the nut 324, the expansion sleeve 323 is guided. The conical surface of the frustum 322 expands radially due to the extrusion of the conical surface, thus tightly fitting with the inner hole of the workpiece to achieve tensioning and positioning of the workpiece and ensure the coaxiality of the workpiece and the mounting post 35. During the downward pressure of the nut 324, the top of the pressure washer 333 contacts the bottom of the nut 324, and the bottom groove is connected to the damping plate 335 through the spring 334. The bottom of the damping plate 335 contacts the top of the fixing block 332. The top of the fixing block 332 is fixed to the top of the rubber ring 331. The inside of the rubber ring 331 is slidably connected to the outside of the mounting post 35, and the bottom contacts the top of the expansion sleeve 323. The rubber ring 331 can buffer the stress when the expansion sleeve 323 expands radially, avoiding rigid contact between the expansion sleeve 323 and the inner hole of the workpiece, which could cause damage to the workpiece. The spring 334 undergoes elastic deformation when the pressure washer 333 applies pressure, which can absorb the interference pressure during the tightening of the nut 324, preventing the workpiece from undergoing plastic deformation due to excessive clamping force. At the same time, it provides a damping effect during the vibration of the gear hobbing process, ensuring the stability of the processing.
[0016] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A clamping fixture for positioning in gear hobbing, comprising a reference flange (1), characterized in that: The top of the reference flange (1) is fixedly connected to a support mechanism (2), and the inside of the support mechanism (2) is threadedly connected to a positioning mechanism (3). The inside of the reference flange (1) is provided with four threaded holes (4) and four positioning grooves (5). The positioning mechanism (3) includes a bolt rod (31), the external thread of which is connected to the inner side of the support mechanism (2). A positioning cone (34) is fixedly connected to the bottom of the bolt rod (31). The outer side of the positioning cone (34) is in contact with the inner side of the support mechanism (2). A mounting column (35) is fixedly connected to the top of the bolt rod (31). A clamping assembly (32) is fixedly connected to the outer side of the mounting column (35). A buffer assembly (33) is slidably connected to the outer side of the mounting column (35).
2. The clamping fixture for positioning gear hobbing according to claim 1, characterized in that: The clamping assembly (32) includes a support ring (321), the inside of which is fixedly connected to the outside of the mounting post (35), the bottom of which is fixedly connected to the top of the bolt rod (31), and a guide cone (322) is fixedly connected to the outside of the mounting post (35).
3. The clamping fixture for positioning gear hobbing according to claim 2, characterized in that: The bottom of the guide cone (322) is fixedly connected to the top of the support ring (321), and an expansion sleeve (323) is fitted on the outside of the guide cone (322). The threaded section at the top of the mounting column (35) is threaded with a nut (324).
4. A clamping fixture for positioning gear hobbing according to claim 3, characterized in that: The buffer assembly (33) includes a rubber ring (331), the inside of which is slidably connected to the outside of the mounting post (35), the bottom of which is in contact with the top of the expansion sleeve (323), and four fixing blocks (332) are fixedly connected to the top of the rubber ring (331).
5. A clamping fixture for positioning gear hobbing according to claim 4, characterized in that: Four fixing blocks (332) are externally slidably connected with pressure washers (333), the top of the pressure washers (333) is in contact with the bottom of the nut (324), two springs (334) are fixedly connected in the bottom groove of the pressure washers (333), and shock-absorbing pressure plates (335) are fixedly connected to the ends of the two springs (334), the bottom of the shock-absorbing pressure plates (335) is in contact with the top of the fixing blocks (332).
6. A clamping fixture for positioning gear hobbing according to claim 1, characterized in that: The support mechanism (2) includes a trapezoidal reinforcing rib (21), the bottom of which is fixedly connected to the top of the reference flange (1), and the top of the reference flange (1) is fixedly connected to a support connection assembly (22).
7. A clamping fixture for positioning gear hobbing according to claim 6, characterized in that: The support connection assembly (22) includes a support sleeve (221), the bottom of which is fixedly connected to the top of the reference flange (1), the inner side of the trapezoidal reinforcing rib (21) is fixedly connected to the outer bottom of the support sleeve (221), the inner side of the support sleeve (221) is threadedly connected to the outside of the bolt rod (31), and the outer side of the positioning cone (34) is in contact with the inner bottom of the support sleeve (221).
8. A clamping fixture for positioning gear hobbing according to claim 7, characterized in that: The support sleeve (221) has two through holes (222) on its outside. The inner side of the through holes (222) is threaded with a connecting bolt (223). The outer side of the connecting bolt (223) is slidably connected in the outer insertion hole of the bolt rod (31).