Gear combination machining device for metal cutting machine tool

Abstract

The application discloses a gear combination machining device for a metal cutting machine tool and belongs to the technical field of gear machining, which comprises a machine box, a hobbing module is arranged on one side of the machine box, a sliding rail is arranged on one side of the machine box, a machine seat is arranged on the top surface of the sliding rail, and a rotating disc is arranged on the top surface of the machine seat; in the application, the friction assembly is arranged, through the design, in the process of rolling cutting of the gear blank, the outer wall of the blank can be cleaned through the friction of the friction belt, so that the influence of rust marks and the like on the outer wall of the blank on cutting is reduced, and along with the cutting, the supporting frame drives the friction belt to extend into the gear slot and rubs the inner wall of the gear slot under the pushing of the torsional spring and the second spring, and when the friction belt moves to the tooth top, the tooth top corner can be rubbed, so that the barbs and the like of the tooth top corner are ground through the friction of the friction belt, and the quality in the re-cutting is ensured.

Description

Technical Field

[0001] This invention belongs to the field of gear processing technology, and particularly relates to a gear combination processing device for metal cutting machine tools. Background Technology

[0002] Gears are a common transmission element. They transmit power through the meshing of teeth on their rims. They can also change speed, direction, and torque. As a result, many large pieces of equipment often use multiple sets of gears for transmission, using the gears to change speed, direction, and torque to drive the equipment. In the gear manufacturing process, the outer wall of the gear blank is cut to give it the corresponding teeth and form a gear.

[0003] During the processing of gear blanks, rust may form on the outer wall of the blank due to improper storage, which will affect the cutting accuracy. At the same time, burrs are inevitably generated during the cutting process, which will also affect the processing accuracy of the gear. Furthermore, when installing the blank, wear of the fixed shaft can easily cause a certain gap between it and the blank shaft hole, which can easily cause misalignment during processing and affect the processing accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a gear combination machining device for metal cutting machine tools, in order to solve the problem that burrs and other defects inevitably occur during the cutting process, which affect the cutting accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gear combination machining device for a metal cutting machine tool, comprising a machine housing, a hobbing module provided on one side of the machine housing, a slide rail provided on one side of the machine housing, a machine base provided on the top surface of the slide rail, and a turntable provided on the top surface of the machine base, and further comprising: A fixing component includes a limiting cylinder disposed on the top surface of the turntable. An extrusion plate is slidably disposed on the outer wall of the limiting cylinder, and the extrusion plates are evenly arranged around the circumference. The extrusion plates extrude the inner wall of the shaft hole of the gear blank. A limiting component, the limiting component including a connecting ring sleeved on the outside of a limiting cylinder, and a fixing rod installed on the outer wall of the connecting ring; The friction assembly includes a mounting bracket located at the other end of the fixed rod, and the bottom end of the mounting bracket is slidably disposed in a groove on the top surface of the base. A friction belt is provided on one side of the mounting bracket, and the friction belt rubs against the outer wall of the gear blank.

[0006] As a further description of the above technical solution: The friction assembly further includes: a rotating shaft, which is mounted on one side of the mounting bracket; The mounting cylinder is rotatably sleeved on the outer wall of the rotating shaft. The mounting cylinder is equipped with a torsion spring inside, and the other end of the torsion spring is fixedly connected to the rotating shaft. The torsion spring can provide rotational reset when the mounting cylinder rotates.

[0007] As a further description of the above technical solution: The friction assembly further includes: a support rod, which is mounted on the outer wall of the mounting cylinder; A sliding rod is slidably installed in the through hole inside the support rod. A second spring is installed at one end of the sliding rod, and the other end of the second spring is fixedly connected to the support rod. Through the synergistic force of the second spring and the torsion spring, the friction band at the end of the sliding rod is tightly attached to the outer wall of the gear blank.

[0008] As a further description of the above technical solution: The friction assembly further includes a support frame, which is rotatably connected to the internal through holes of the slide rod via cylinders at both ends, and the friction band is sleeved on the outer wall of the support frame; A spring is mounted on the outer wall of the support frame, and one side of the spring abuts against the inner wall of the friction belt to further ensure that the friction belt is in contact with the outer surface of the gear blank, so as to use the friction belt to rub the outer surface of the gear blank.

[0009] As a further description of the above technical solution: The fixing component further includes: a fixing plate, which is installed on the inner wall of the limiting cylinder and is located on both sides of the extrusion plate. A limiting block is provided on one side of the fixing plate, which corresponds to the grooves on both sides of the extrusion plate. The limiting block on one side of the fixing plate guides the movement direction of the extrusion plate and limits the movement trajectory of the extrusion plate. The mounting base is located on one side of the extrusion plate, and multiple mounting bases are arranged around the circumference of the mounting base. A first spring is installed on one side of the mounting base, and the other end of the first spring is located in a groove on one side of the extrusion plate. One end of the first spring is fixedly connected to the extrusion plate. The extrusion plate is pulled back to its original position by the first spring, so that the extrusion plate always fits the mounting base.

[0010] As a further description of the above technical solution: The fixing component further includes: a plug, which is installed on one side of the extrusion plate and is slidably disposed in a groove on one side of the mounting base; The insert rod is slidably set in a groove on one side of the mounting base via a rib on one side, and the bottom end of the insert rod and the top end of the insert block are provided with corresponding inclined surfaces. By pressing the insert block with the insert rod, the insert block and the pressing plate are pushed outward, thereby driving the pressing plate to abut against the inner wall of the gear shaft hole. The limiting frame is slidably disposed on the outer wall of the insert rod, and corresponding limiting protrusions are provided at both ends of the limiting frame and on both sides of the insert rod. When the limiting frame moves down, the limiting protrusions squeeze each other to drive the insert rod to move down synchronously, thereby pushing the mounting base and the extrusion plate to abut against the inner wall of the gear shaft hole.

[0011] As a further description of the above technical solution: The fixing component further includes: a pressure plate, which is slidably sleeved on the outer wall of the limiting cylinder, and the pressure plate has an opening corresponding to the limiting frame. The limiting frame is slidably connected to the sliding groove on the inner side of the pressure plate through the cylinders at both ends. The top surface of the pressure plate has a connecting strip corresponding to the groove inside the connecting ring. The pressure plate can move down to drive the limiting frame to move synchronously, thereby driving the insertion rod to squeeze the insertion block to complete the locking. The mounting plate is slidably installed inside the limiting cylinder. The mounting plate is threadedly connected to a first threaded rod through an internal threaded hole. The mounting plate is hinged to a connecting plate through a hinge seat on its top surface, and the other end of the connecting plate is hinged to one end of the mounting seat. By rotating the first threaded rod, the mounting plate is moved, and then the mounting seat is pushed through the connecting plate, which in turn pushes the extrusion plate to extrude the inner wall of the gear shaft hole.

[0012] As a further description of the above technical solution: The limiting component further includes: a scraper, which is installed on one side of the fixing rod; The connecting seat is slidably installed in the groove on the top surface of the fixed rod, and one side of the connecting seat is slidably set in the groove on one side of the mounting bracket.

[0013] As a further description of the above technical solution: The limiting component further includes: a slot, which is formed on one side of the fixing rod, and multiple slots are arranged linearly; The insert plate is slidably installed on one side of the connector, and the insert plate is connected to the fixing rod through a slot. The insert plate and the slot are engaged to form a positioning constraint on the connector and prevent relative slippage between the connector and the fixing rod.

[0014] As a further description of the above technical solution: The limiting component further includes a second threaded rod, which is rotatably mounted on the top of the connecting seat and is threadedly connected to the mounting frame through a threaded hole at the top of the mounting frame. By rotating the second threaded rod, the connecting seat is moved, thereby adjusting the height of the connecting seat so that the bottom surface of the fixed rod contacts the upper surface of the gear blank.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, by setting up a friction assembly, this design enables the friction belt to clean the outer wall of the gear blank during the hobbing process, thereby reducing the impact of rust and other defects on the cutting process. Simultaneously, as the cutting progresses, the torsion spring and the second spring push the support frame to drive the friction belt into the tooth groove to rub the inner wall of the tooth groove. When the friction belt moves to the tooth tip, it can rub the tooth tip corner, thereby using the friction of the friction belt to grind away the barbs and other defects on the tooth tip corner, thus ensuring the quality during subsequent cutting.

[0016] In this invention, by setting a fixing component, this design enables the gear blank to be placed. As the shaft hole of the gear blank is connected to the limiting cylinder, the connecting plate is pushed by the mounting plate, and the extrusion plate moves outward under the guidance of the fixing plate. Since there are multiple extrusion plates around the circumference, the pushing of the extrusion plate against the inner wall of the shaft hole ensures that the shaft hole and the limiting cylinder are coaxial, thus avoiding the impact of gaps caused by wear on the outer wall of the limiting cylinder. At the same time, the extrusion of the extrusion plate increases the friction between it and the shaft hole, thus preventing the blank from rotating during the processing and further ensuring the accuracy of gear processing.

[0017] In this invention, by setting a limiting component, the design enables the connecting ring to move as the pressure plate moves downward. This allows the second threaded rod to be rotated to move the connecting seat, thereby adjusting the other end of the fixing rod to a suitable position. Simultaneously, the friction plate at the bottom of the fixing rod and the bottom of the scraper on one side can contact the upper surface of the blank, allowing the friction plate to clean the upper surface. If there are debris on the upper surface, the scraper can scrape them off to reduce the impact of the debris. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a gear assembly machining device for a metal cutting machine tool.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a gear assembly machining device for a metal cutting machine tool.

[0020] Figure 3 This is a schematic diagram showing the disassembled structure of a friction component in a gear assembly machining device for a metal cutting machine tool.

[0021] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0022] Figure 5 This is a schematic diagram showing the disassembled structure of a limiting component in a gear assembly machining device for a metal cutting machine tool.

[0023] Figure 6 This is a schematic diagram showing the disassembled structure of a fixed component in a gear assembly machining device for a metal cutting machine tool.

[0024] Figure 7 This is a schematic diagram of the combined structure of a connecting ring and a pressure plate in a gear combination machining device for a metal cutting machine tool.

[0025] Figure 8 for Figure 7 A magnified structural diagram of part B.

[0026] Legend: 1. Chassis; 2. Roll cutting module; 3. Fixing assembly; 301. First threaded rod; 302. Pressure plate; 303. Limiting frame; 304. Insert rod; 305. Extrusion plate; 306. Mounting base; 307. Insert block; 308. First spring; 309. Connecting plate; 310. Mounting plate; 311. Fixing plate; 312. Limiting cylinder; 4. Limiting assembly; 401. Second threaded rod; 402. Inserting plate 403. Connecting seat; 404. Slot; 405. Fixing rod; 406. Scraper; 407. Connecting ring; 5. Friction assembly; 501. Torsion spring; 502. Mounting cylinder; 503. Rotating shaft; 504. Mounting bracket; 505. Support rod; 506. Second spring; 507. Slide rod; 508. Friction belt; 509. Support frame; 510. Spring sheet; 6. Machine base; 7. Slide rail; 8. Turntable. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-8 The present invention provides a technical solution: a gear combination machining device for a metal cutting machine tool, comprising a housing 1, a hobbing module 2 disposed on one side of the housing 1, a slide rail 7 disposed on one side of the housing 1, a base 6 disposed on the top surface of the slide rail 7, and a turntable 8 disposed on the top surface of the base 6, and further comprising: The fixing component 3 includes a limiting cylinder 312 disposed on the top surface of the turntable 8. An extrusion plate 305 is slidably disposed on the outer wall of the limiting cylinder 312, and the extrusion plates 305 are evenly arranged around the circumference. The extrusion plates 305 extrude the inner wall of the shaft hole of the gear blank. Limiting component 4 includes a connecting ring 407 sleeved on the outside of the limiting cylinder 312, and a fixing rod 405 is installed on the outer wall of the connecting ring 407. Friction assembly 5 includes a mounting bracket 504 located at the other end of the fixed rod 405, and the bottom end of the mounting bracket 504 is slidably disposed in the groove on the top surface of the base 6. A friction belt 508 is provided on one side of the mounting bracket 504, and the outer wall of the gear blank is rubbed by the friction belt 508. like Figure 3 , Figure 4 As shown, the friction assembly 5 also includes: a rotating shaft 503, which is mounted on one side of the mounting bracket 504; The mounting cylinder 502 is rotatably sleeved on the outer wall of the rotating shaft 503. The mounting cylinder 502 is equipped with a torsion spring 501 inside, and the other end of the torsion spring 501 is fixedly connected to the rotating shaft 503. The torsion spring 501 can provide rotational reset when the mounting cylinder 502 rotates. Friction assembly 5 also includes: support rod 505, which is mounted on the outer wall of mounting cylinder 502; The slide rod 507 is slidably installed in the through hole inside the support rod 505. A second spring 506 is installed at one end of the slide rod 507, and the other end of the second spring 506 is fixedly connected to the support rod 505. Through the synergistic force of the second spring 506 and the torsion spring 501, the friction strip 508 at the end of the slide rod 507 is tightly attached to the outer wall of the gear blank. The friction assembly 5 also includes: a support frame 509, which is rotatably connected to the inner through hole of the slide rod 507 through the cylinders at both ends, and the friction belt 508 is sleeved on the outer wall of the support frame 509; Spring 510 is installed on the outer wall of support frame 509, and one side of spring 510 abuts against the inner wall of friction belt 508. Through the contact of spring 510 against friction belt 508, it is further ensured that friction belt 508 is in contact with the outer surface of gear blank, so as to use friction belt 508 to rub the outer surface of gear blank. In another embodiment, the rolling cutting module 2 is known in the art, and the rolling cutting module 2 consists of a rolling cutter and a driving device, so it is not described in detail here.

[0029] The specific implementation is as follows: During the processing of the gear blank, as the turntable 8 drives the gear blank to rotate, the torsion spring 501 can be in a certain torsional state, so that the mounting cylinder 502 rotates under the reaction force of the torsion spring 501, and drives the support rod 505 to rotate. At the same time, under the push of the second spring 506 on the slide rod 507, the friction strip 508 can be put into contact with the outer wall of the gear blank, and then the outer wall of the gear blank is cleaned by the friction strip 508. Furthermore, as the rolling die 2 cuts the gear blank, the tooth grooves on the surface of the blank are gradually formed. Then, under the push of the torsion spring 501 and the second spring 506, the friction strip 508 can enter the tooth groove to rub and clean its surface, so as to reduce the burrs generated during the cutting process. At the same time, since the spring 510 is located inside the friction strip 508 and supports the friction strip 508, when the friction strip 508 contacts the tooth groove sidewall, the spring 510 can generate a certain deformation to ensure that the friction strip 508 is in close contact with the tooth groove inner wall. Furthermore, since the friction belt 508 is located on the outer wall of the support frame 509, and the support frame 509 is triangular and rotatably located at one end of the slide rod 507, the friction belt 508 can rotate when it moves to the top of the gear teeth during the process of moving within the tooth groove. This allows the friction belt 508 to change the part that contacts the gear surface, thereby reducing the impact of long-term friction of the friction belt 508 at a single position.

[0030] like Figures 6-8 As shown, the fixing component 3 also includes a fixing plate 311, which is installed on the inner wall of the limiting cylinder 312 and is located on both sides of the extrusion plate 305. A limiting block corresponding to the grooves on both sides of the extrusion plate 305 is provided on one side of the fixing plate 311. The limiting block on one side of the fixing plate 311 guides the movement direction of the extrusion plate 305 and limits the movement trajectory of the extrusion plate 305. Mounting base 306 is located on one side of extrusion plate 305, and multiple mounting bases are arranged around the circumference of mounting base 306. A first spring 308 is installed on one side of mounting base 306, and the other end of the first spring 308 is located in a groove on one side of extrusion plate 305. One end of the first spring 308 is fixedly connected to extrusion plate 305. The extrusion plate 305 is pulled back to its original position by the first spring 308, so that the extrusion plate 305 always fits against mounting base 306. The fixing component 3 also includes: a plug 307, which is installed on one side of the extrusion plate 305 and is slidably disposed in a groove on one side of the mounting base 306; Insert rod 304 is slidably set in a groove on one side of mounting base 306 via a rib on one side, and the bottom end of insert rod 304 and the top end of insert block 307 are provided with corresponding inclined surfaces. By pressing insert block 307 with insert rod 304, insert block 307 and pressing plate 305 are pushed outward, thereby driving pressing plate 305 to abut against the inner wall of gear shaft hole; The limiting frame 303 is slidably disposed on the outer wall of the insert rod 304, and the two ends of the limiting frame 303 and the two sides of the insert rod 304 are provided with corresponding limiting protrusions. When the limiting frame 303 moves down, the limiting protrusions squeeze each other to drive the insert rod 304 to move down synchronously, so as to push the mounting base 306 and the extrusion plate 305 to abut against the inner wall of the gear shaft hole. The fixing component 3 also includes: a pressure plate 302, which is slidably sleeved on the outer wall of the limiting cylinder 312, and the pressure plate 302 has an opening corresponding to the limiting frame 303. The limiting frame 303 is slidably connected to the sliding groove on the inner side of the pressure plate 302 through the cylinders at both ends. The top surface of the pressure plate 302 is provided with a connecting strip corresponding to the groove inside the connecting ring 407. The pressure plate 302 can move down to drive the limiting frame 303 to move synchronously, thereby driving the insertion rod 304 to press the insertion block 307 to complete the locking. Mounting disc 310 is slidably mounted inside limiting cylinder 312. Mounting disc 310 is threadedly connected to first threaded rod 301 through internal threaded hole. Mounting disc 310 is hinged to connecting plate 309 through hinge seat on top surface, and the other end of connecting plate 309 is hinged to one end of mounting base 306. By rotating first threaded rod 301, mounting disc 310 is moved, and then mounting base 306 is pushed through connecting plate 309, so as to push extrusion plate 305 to extrude the inner wall of gear shaft hole.

[0031] The specific implementation is as follows: When installing the gear blank, the shaft hole in the middle of the gear blank is passed through the limiting cylinder 312 and placed on the surface of the turntable 8. Then, the mounting plate 310 can be moved by rotating the first threaded rod 301. At the same time, as the mounting plate 310 moves, the mounting seat 306 can be moved by the connecting plate 309. The movement of the mounting seat 306 drives the extrusion plate 305 to move outward. The extrusion plate 305 extrudes the inner wall of the shaft hole of the gear blank. Since there are multiple extrusion plates 305 arranged circumferentially, they move synchronously under the push of the connecting plate 309. Thus, the extrusion of the extrusion plate 305 can ensure that the shaft hole and the limiting cylinder 312 are coaxial. This avoids the gap between the outer wall of the limiting cylinder 312 and the inner wall of the shaft hole caused by wear caused by long-term use, which would affect the positioning accuracy. Furthermore, as the extrusion plate 305 comes into contact with the inner wall of the shaft hole of the gear blank, the pressure plate 302 can be pressed down to drive the limiting frame 303 to move downward. At the same time, since the two ends of the limiting frame 303 and the two sides of the insert rod 304 are provided with corresponding limiting protrusions, the insert rod 304 can be driven to move downward under the mutual friction between the limiting protrusions. Since the bottom end of the insert rod 304 and the top end of the insert block 307 are provided with corresponding inclined surfaces, the extrusion plate 305 can be further pushed under the action of the insert rod 304, thereby ensuring that the extrusion plate 305 is tightly connected to the inner wall of the shaft hole. The pressure plate 302 covers the top of the gear blank and can further limit the gear blank.

[0032] like Figure 5 As shown, the limiting component 4 also includes a scraper 406, which is installed on one side of the fixing rod 405; Connecting seat 403 is slidably installed in the groove on the top surface of the fixing rod 405, and one side of the connecting seat 403 is slidably set in the groove on one side of the mounting bracket 504; The limiting component 4 also includes: a slot 404, which is opened on one side of the fixing rod 405, and multiple slots 404 are arranged linearly; Insert plate 402 is slidably installed on one side of connector 403, and insert plate 402 is connected to fixing rod 405 through slot 404. Insert plate 402 and slot 404 engage to form a positioning constraint on connector 403 and prevent relative slippage between connector 403 and fixing rod 405. The limiting component 4 also includes a second threaded rod 401, which is rotatably mounted on the top of the connecting seat 403. The second threaded rod 401 is threadedly connected to the mounting bracket 504 through the threaded hole at the top of the mounting bracket 504. By rotating the second threaded rod 401, the connecting seat 403 is moved, thereby adjusting the height of the connecting seat 403 so that the bottom surface of the fixing rod 405 contacts the upper surface of the gear blank.

[0033] The specific implementation is as follows: During the process of pressing down the pressure plate 302, since the connecting ring 407 is rotatably connected to the connecting strip on the surface of the pressure plate 302, as the pressure plate 302 moves down, it can drive the connecting ring 407 and the fixing rod 405 to move down, and make the scraper 406 on one side of the fixing rod 405 contact the surface of the gear blank. At the same time, the friction plate provided on the bottom surface of the fixing rod 405 contacts the surface of the gear blank. Thus, during the process of the turntable 8 driving the gear blank to rotate, the upper surface of the blank can be cleaned by friction through the friction plate. If the rolling cutting module 2 adopts cutting from bottom to top, the scraper 406 can scrape off the debris on the upper surface of the blank. Furthermore, as the connecting ring 407 moves downward with the pressure plate 302, the connecting seat 403 can be moved by rotating the second threaded rod 401. As the connecting seat 403 moves, the other end of the fixing rod 405 can be moved downward. At the same time, the sliding mounting bracket 504 moves the connecting seat 403 to a suitable position, so that the friction band 508 contacts the outer wall of the gear blank. Then, the connecting seat 403 and the mounting bracket 504 can be limited by inserting the insert plate 402 into the slot 404.

[0034] Working principle: In the gear processing process, the gear blank is first placed on the outer wall of the limiting cylinder 312 through its central shaft hole. Then, by rotating the first threaded rod 301, the mounting plate 310 is moved, which pushes the mounting seat 306 through the connecting plate 309, thereby pushing the extrusion plate 305 to extrude the inner wall of the shaft collar. Then, by pressing down the pressure plate 302 and rotating the second threaded rod 401, the pressure plate 302 and the fixed rod 405 can press down synchronously. This causes the insertion rod 304 to move down through the limiting frame 303 on the inner side of the pressure plate 302, thereby extruding the insertion block 307 through the insertion rod 304. At the same time, the downward movement of the fixed rod 405 allows the scraper 406 and the friction plate at the bottom to contact the upper surface of the blank. Then... The sliding mounting bracket 504 moves the connecting seat 403 to a suitable position, causing the friction band 508 to contact the outer surface of the blank. At the same time, the connection between the insert plate 402 and the slot 404 limits the connection between the connecting seat 403 and the mounting bracket 504. Finally, as the turntable 8 rotates the blank and the cutting process is carried out by the rolling cutting module 2, as the tooth groove is gradually cut out, the friction band 508 can extend into the tooth groove for friction cleaning under the action of the torsion spring 501 and the second spring 506. Since the friction band 508 is supported by the spring plate 510 on the inner side, the spring plate 510 will deform to a certain extent when the friction band 508 contacts the blank, thereby ensuring that the friction band 508 is tightly attached to the outer wall of the blank.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A gear assembly machining device for a metal cutting machine tool, comprising: A chassis (1), wherein a rolling cutting module (2) is provided on one side of the chassis (1), a slide rail (7) is provided on one side of the chassis (1), a base (6) is provided on the top surface of the slide rail (7), and a turntable (8) is provided on the top surface of the base (6), characterized in that it further includes: The fixing component (3) includes a limiting cylinder (312) disposed on the top surface of the turntable (8). The outer wall of the limiting cylinder (312) is slidably provided with an extrusion plate (305), and the extrusion plates (305) are evenly arranged around the circumference. The extrusion plates (305) extrude the inner wall of the shaft hole of the gear blank. The limiting component (4) includes a connecting ring (407) sleeved on the outside of the limiting cylinder (312), and a fixing rod (405) is installed on the outer wall of the connecting ring (407). The friction assembly (5) includes a mounting bracket (504) located at the other end of the fixed rod (405), and the bottom end of the mounting bracket (504) is slidably disposed in the groove on the top surface of the base (6). A friction belt (508) is provided on one side of the mounting bracket (504), and the outer wall of the gear blank is rubbed by the friction belt (508).

2. The gear combination machining device for metal cutting machine tools according to claim 1, characterized in that, The friction assembly (5) further includes: A rotating shaft (503) is mounted on one side of a mounting bracket (504); The mounting cylinder (502) is rotatably sleeved on the outer wall of the rotating shaft (503). The mounting cylinder (502) is provided with a torsion spring (501) inside, and the other end of the torsion spring (501) is fixedly connected to the rotating shaft (503). The torsion spring (501) can provide rotational reset when the mounting cylinder (502) rotates.

3. The gear combination machining device for metal cutting machine tools according to claim 2, characterized in that, The friction assembly (5) further includes: Support rod (505), said support rod (505) is installed on the outer wall of mounting cylinder (502); A slide rod (507) is slidably installed in the through hole inside the support rod (505). A second spring (506) is installed at one end of the slide rod (507), and the other end of the second spring (506) is fixedly connected to the support rod (505). Through the synergistic force of the second spring (506) and the torsion spring (501), the friction strip (508) at the end of the slide rod (507) is tightly attached to the outer wall of the gear blank.

4. The gear combination machining device for metal cutting machine tools according to claim 3, characterized in that, The friction assembly (5) further includes: The support frame (509) is rotatably connected to the inner through hole of the slide rod (507) through the cylinders at both ends, and the friction belt (508) is sleeved on the outer wall of the support frame (509); A spring (510) is installed on the outer wall of the support frame (509), and one side of the spring (510) abuts against the inner wall of the friction strip (508). The contact between the spring (510) and the friction strip (508) further ensures that the friction strip (508) is in contact with the outer surface of the gear blank, so as to use the friction strip (508) to rub the outer surface of the gear blank.

5. A gear combination machining device for a metal cutting machine tool according to claim 1, characterized in that, The fixing component (3) also includes: A fixing plate (311) is installed on the inner wall of the limiting cylinder (312), and the fixing plate (311) is located on both sides of the extrusion plate (305). A limiting block corresponding to the grooves on both sides of the extrusion plate (305) is provided on one side of the fixing plate (311). The limiting block on one side of the fixing plate (311) guides the movement direction of the extrusion plate (305) and limits the movement trajectory of the extrusion plate (305). Mounting base (306) is disposed on one side of extrusion plate (305), and multiple mounting bases (306) are arranged around the circumference of the mounting base (306). A first spring (308) is installed on one side of the mounting base (306), and the other end of the first spring (308) is located in a groove on one side of the extrusion plate (305). One end of the first spring (308) is fixedly connected to the extrusion plate (305). The extrusion plate (305) is pulled back to its original position by the first spring (308), so that the extrusion plate (305) always fits the mounting base (306).

6. The gear combination machining device for metal cutting machine tools according to claim 5, characterized in that, The fixing component (3) also includes: Insert (307), the insert (307) is installed on one side of the extrusion plate (305), and the insert (307) is slidably disposed in the groove on one side of the mounting base (306); Insert rod (304), the insert rod (304) is slidably set in the groove on one side of the mounting base (306) by a rib on one side, and the bottom end of the insert rod (304) and the top end of the insert block (307) are provided with corresponding inclined surfaces. By pressing the insert block (307) with the insert rod (304), the insert block (307) and the pressing plate (305) are pushed outward, thereby driving the pressing plate (305) to abut against the inner wall of the gear shaft hole; The limiting frame (303) is slidably disposed on the outer wall of the insert rod (304), and the two ends of the limiting frame (303) and the two sides of the insert rod (304) are provided with corresponding limiting protrusions. When the limiting frame (303) moves down, the insert rod (304) moves down synchronously by relying on the mutual squeezing of the limiting protrusions, so as to push the mounting base (306) and the extrusion plate (305) to abut against the inner wall of the gear shaft hole.

7. A gear combination machining device for a metal cutting machine tool according to claim 6, characterized in that, The fixing component (3) also includes: The pressure plate (302) is slidably sleeved on the outer wall of the limiting cylinder (312), and the pressure plate (302) has an opening corresponding to the limiting frame (303). The limiting frame (303) is slidably connected to the sliding groove on the inner side of the pressure plate (302) through the cylinders at both ends. The top surface of the pressure plate (302) is provided with a connecting strip corresponding to the groove inside the connecting ring (407). The pressure plate (302) can move down to drive the limiting frame (303) to move synchronously, thereby driving the insertion rod (304) to squeeze the insertion block (307) to complete the locking. Mounting disc (310) is slidably mounted inside limiting cylinder (312). Mounting disc (310) is threadedly connected to first threaded rod (301) through internal threaded hole. Mounting disc (310) is hinged to connecting plate (309) through hinge seat on top surface. The other end of connecting plate (309) is hinged to one end of mounting seat (306). By rotating first threaded rod (301), mounting disc (310) is moved, and then mounting seat (306) is pushed by connecting plate (309) to push extrusion plate (305) to extrude the inner wall of gear shaft hole.

8. A gear combination machining device for a metal cutting machine tool according to claim 1, characterized in that, The limiting component (4) also includes: A scraper (406) is mounted on one side of a fixed rod (405); Connecting seat (403) is slidably installed in the groove on the top surface of the fixing rod (405), and one side of the connecting seat (403) is slidably set in the groove on one side of the mounting bracket (504).

9. A gear combination machining device for a metal cutting machine tool according to claim 8, characterized in that, The limiting component (4) also includes: Slots (404) are provided on one side of the fixing rod (405), and multiple slots (404) are arranged linearly. Insert plate (402) is slidably installed on one side of connector (403), and insert plate (402) is connected to fixing rod (405) through slot (404). Insert plate (402) and slot (404) engage to form a positioning constraint on connector (403) and prevent relative slippage between connector (403) and fixing rod (405).

10. A gear combination machining device for a metal cutting machine tool according to claim 8, characterized in that, The limiting component (4) also includes: The second threaded rod (401) is rotatably mounted on the top of the connecting seat (403), and the second threaded rod (401) is threadedly connected to the mounting bracket (504) through the threaded hole at the top of the mounting bracket (504). By rotating the second threaded rod (401), the connecting seat (403) is moved, thereby adjusting the height of the connecting seat (403) so that the bottom surface of the fixed rod (405) contacts the upper surface of the gear blank.

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