A broach for gear machining and its finishing device

Abstract

This invention provides a broach for gear machining and its finishing device, relating to the field of gear manufacturing technology. The broach and finishing device include a bed, a drive unit, a CNC system, a clamping device, a coolant storage tank, a high-pressure air supply device, a dust extraction device, and two sets of cooling pumps. When the coolant cooling effect is insufficient, the invention increases the coolant flow rate through an electrically controlled flow valve to improve the cooling effect. If necessary, forced cooling can be achieved by simultaneously activating two sets of cooling pumps, significantly enhancing the cooling effect. The high-pressure air supply device provides high-pressure air to the compressed air nozzle, which is then sprayed onto the surface of the CBN grinding wheel through the jet chamber outlet to clean the surface, effectively reducing clogging and the frequency of grinding wheel dressing. Simultaneously, the dust extraction device, dust extraction pipe, and dust extraction hood remove dust from inside the grinding wheel hood, reducing floating dust and preventing dust from adhering to the grinding wheel surface and entering the grinding area.

Description

Technical Field

[0001] This invention relates to the field of gear manufacturing technology, specifically to a broach for gear machining and its finishing device. Background Technology

[0002] Gears are core transmission components in automotive motion, and their machining quality directly impacts the vibration, noise, and reliability of the entire vehicle assembly, sometimes becoming a key factor restricting product improvement. Gear machining involves specialized and complex tooling systems, requiring the selection and design of different tools based on different gear products and machining methods. Examples include hobs, shaving cutters, and gear shapers for cylindrical gears; broaches for spur bevel gears; and various milling cutters for spiral bevel gears. Gear tool sharpening generally requires specialized machine tools; for instance, broaches are typically precision-machined using CNC tool grinders.

[0003] Existing CNC tool grinders used for finishing broaches typically use CBN grinding wheels to sharpen the tools. During machining, a single CBN grinding wheel dressing session can only support 20-30 pieces of work, requiring frequent machine stops for dressing, resulting in low production efficiency and affecting the machining accuracy of the broaches. Furthermore, the cooling effect of existing CNC tool grinders needs improvement. Current industry solutions to these shortcomings include reducing the feed speed of the diamond dressing pen to improve the dressing effect; and changing the coolant from water-based to oil-based to improve cooling efficiency, reduce pore blockage in the grinding wheel, and decrease the frequency of sharpening. However, the effectiveness of these improvements still has room for further enhancement. Therefore, it is necessary to optimize and improve the structure of the finishing device for gear broaches to increase production efficiency and produce gear broaches with higher precision. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a broach for gear machining and its finishing device, which solves the problems of low production efficiency and insufficient machining accuracy caused by the need for frequent grinding wheel dressing in existing broaches and finishing devices for gear machining.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a finishing device for a broach used in gear machining, comprising a bed, a drive unit, a CNC system, a clamping device, a coolant storage tank, a high-pressure air supply unit, a dust extraction unit, and two sets of cooling pumps. The bed contains a working chamber, with a door slidably connected to the front wall of the working chamber. A viewing window is provided inside the door. A grinding wheel frame is mounted on the upper inner wall of the working chamber. A grinding wheel cover is fixedly connected to the lower wall of the grinding wheel frame. A CBN grinding wheel is rotatably connected to the inner wall of the grinding wheel cover. Two sets of fixed pipes are fixedly connected to the front wall of the grinding wheel frame via a fixed base. The upper and lower ends of the fixed pipes respectively penetrate the upper and lower side walls of the fixed base. A coolant inlet pipe is fixedly connected to the upper end of the fixed pipe. The ends of the two sets of coolant inlets away from the fixed pipes are... The device is connected to a set of cooling pumps, both of which are located inside the coolant storage tank. A coolant nozzle is fixedly connected to the lower end of the fixed pipe. The outer walls of both sets of fixed pipes are equipped with flow control structures for controlling coolant flow. The rear wall of the grinding wheel cover is sequentially equipped with a grinding wheel cleaning structure for cleaning the CBN grinding wheel and a dust suction structure for removing dust generated after cleaning the CBN grinding wheel. The grinding wheel cleaning structure is connected to a high-pressure air supply device, and the dust suction structure is connected to a dust suction device. A connecting frame is fixedly connected to the grinding wheel cover. A slider is slidably connected to the front wall of the connecting frame via a guide structure. A telescopic drive structure for driving the slider to move back and forth is provided between the slider and the connecting frame. A temperature detection structure for detecting coolant temperature is provided on the front wall of the slider.

[0006] To adjust the cooling effect, preferably, the flow control structure includes two sets of electrically controlled flow valves. The two sets of electrically controlled flow valves are respectively fixedly connected to the outer wall of a set of fixed pipes. The electrically controlled flow valves are arranged between the fixed seat and the coolant nozzle. The flow rate of the coolant nozzle is controlled by the electrically controlled flow valves.

[0007] During operation, one set of two cooling pumps is activated first, with the coolant flow rate controlled by an electronically controlled flow valve. When the temperature detection structure detects that the coolant temperature flowing out of the grinding area is too high, the CNC system controls the electronically controlled flow valve to increase the coolant flow rate. When the maximum flow rate of one set of cooling pumps is still insufficient to meet the cooling effect, the CNC system immediately starts the other set of cooling pumps. The simultaneous activation of two sets of cooling pumps forces cooling of the grinding area, preventing the CBN grinding wheel from overheating and expanding, and preventing the broach body from being burned at high temperatures.

[0008] To reduce clogging, the preferred grinding wheel cleaning structure includes a compressed air nozzle and an air inlet pipe. The compressed air nozzle is fixedly connected to the inner rear wall of the grinding wheel cover and is located above the axis of the CBN grinding wheel. The compressed air nozzle has an air jet chamber inside, and the air outlet direction of the air jet chamber is tangent to the outer circumference of the CBN grinding wheel. The air inlet pipe is fixedly connected to the rear wall of the grinding wheel cover. One end of the air inlet pipe facing the grinding wheel cover communicates with the interior of the air jet chamber, and the other end of the air inlet pipe away from the grinding wheel cover is connected to a high-pressure air supply device.

[0009] The high-pressure air supply device generates high-pressure air, which is sprayed along the air inlet pipe and compressed air nozzle toward the outer circumference of the CBN grinding wheel to clean the surface of the CBN grinding wheel, prevent the pores on the grinding wheel surface from becoming clogged, effectively reduce the number of grinding wheel repairs, and improve production efficiency.

[0010] In order to remove the dust generated during the operation of the grinding wheel cleaning structure, preferably, the dust suction structure includes a dust suction pipe and a dust suction hood. The dust suction hood is fixedly connected to the rear wall of the grinding wheel hood and located below the grinding wheel cleaning structure. The front wall of the dust suction hood penetrates through the rear wall of the grinding wheel hood and communicates with the interior of the grinding wheel hood. The dust suction pipe is fixedly connected to the rear wall of the dust suction hood, and the end of the dust suction pipe away from the dust suction hood is connected to a dust suction device.

[0011] The vacuuming device creates negative pressure inside the vacuum hood through the vacuum pipe. The vacuum hood's suction range covers the inside of the grinding wheel hood, and all the floating dust generated during the cleaning process of the grinding wheel is sucked away by the vacuuming device.

[0012] To prevent the slider from reversing and causing the temperature detection structure to fail to face the coolant, preferably, the guide structure includes two sets of guide rods. The two sets of guide rods are distributed left and right and fixedly connected to the rear wall of the slider. The ends of the two sets of guide rods away from the slider pass through the connecting frame and are slidably connected to the connecting frame. The slider is slidably connected to the connecting frame through the two sets of guide rods.

[0013] When the slider is driven back and forth by the electric telescopic rod, it is guided by two sets of guide rods to keep moving only back and forth and not reverse, ensuring that the temperature sensor detection surface always faces the coolant.

[0014] To prevent the temperature detection structure from being bumped during the loading and unloading of workpieces, preferably, the telescopic drive structure is an electric telescopic rod, which is fixedly connected to the lower wall of the connecting frame, and the end of the extension shaft of the electric telescopic rod is fixedly connected to the rear wall of the slider.

[0015] When loading and unloading workpieces, the electric telescopic rod drives the slider to retract below the grinding wheel cover, which can prevent the temperature sensor from being bumped. During processing, the electric telescopic rod extends its shaft, driving the slider and temperature sensor forward so that the temperature sensor can come into contact with the coolant.

[0016] To monitor the cooling effect of the coolant in real time, preferably, the temperature detection structure is a temperature sensor, which is fixedly connected to the front wall of the slider. The temperature sensor consists of a detection seat and a detection patch. The detection seat is fixedly connected to the front wall of the slider, and an inclined surface is provided between the end of the detection seat away from the slider and the upper wall of the detection seat. The detection patch is disposed on the upper wall of the inclined surface.

[0017] During the processing, the temperature of the coolant is detected by a detection patch that comes into contact with the coolant, and the data is transmitted back to the CNC system, which then analyzes the current cooling effect.

[0018] A broach for gear machining includes a broach body, which is machined by a finishing device for a gear machining broach as described above.

[0019] This invention provides a broach for gear machining and a finishing apparatus thereof. It has the following advantages:

[0020] Compared with existing technologies, this gear machining broach and its finishing device are equipped with two separate cooling pumps and an electronically controlled flow valve that can adjust the coolant flow rate. With the help of a temperature sensor that detects the coolant temperature, the flow rate can be increased in time by the electronically controlled flow valve when the coolant cooling effect is insufficient, so as to improve the cooling effect. If necessary, both sets of cooling pumps can be activated simultaneously for forced cooling, which greatly improves the cooling effect, improves machining accuracy, and ensures the cooling effect. In addition to ensuring machining accuracy, it also avoids the expansion of CBN grinding wheel caused by high temperature.

[0021] Compared with existing technologies, this gear processing broach and its finishing device are equipped with a compressed air nozzle and a dust suction hood on the rear wall of the grinding wheel cover. High-pressure air is supplied to the compressed air nozzle through a high-pressure air supply device. The high-pressure air is sprayed onto the surface of the CBN grinding wheel through the jet chamber outlet to clean the surface of the CBN grinding wheel. This can effectively reduce clogging, maintain the service life of the CBN grinding wheel, and reduce the frequency of grinding wheel dressing. At the same time, the dust is sucked away from the inside of the grinding wheel cover by the dust suction device, dust suction pipe and dust suction hood, reducing floating dust and preventing dust from adhering to the grinding wheel surface and entering the grinding area, thus effectively improving the machining accuracy of the broach body. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a front view of the overall structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4This is a partial sectional view of the side of the connection structure between the grinding wheel frame and the grinding wheel cover of the present invention;

[0026] Figure 5 This is a partial top view schematic diagram of the connection structure of the connecting frame, slider, and temperature sensor of the present invention;

[0027] Figure 6 This is a cross-sectional schematic diagram of the internal structure of the compressed air nozzle of the present invention.

[0028] The components are as follows: 1. Bed; 2. Chamber door; 3. Viewing window; 4. Working chamber; 5. Broach body; 6. Grinding wheel holder; 7. Grinding wheel cover; 8. CBN grinding wheel; 9. Fixing seat; 10. Fixing pipe; 11. Coolant inlet pipe; 12. Electrically controlled flow valve; 13. Coolant nozzle; 14. Air inlet pipe; 15. Dust suction pipe; 16. Dust suction hood; 17. Connecting frame; 18. Slider; 19. Temperature sensor; 1901. Detection seat; 1902. Detection patch; 20. Compressed air nozzle; 2001. Air jet chamber; 21. Electric telescopic rod; 22. Guide rod. Detailed Implementation

[0029] 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. Example

[0030] like Figures 1 to 6 As shown, this embodiment of the invention provides a finishing device for a broach used in gear machining, including a bed 1, a drive device, a CNC system, a clamping device, a coolant storage tank, a high-pressure air supply device, a dust extraction device, and two sets of cooling pumps. The bed 1 has a working chamber 4 inside, and a chamber door 2 is slidably connected to the front wall of the working chamber 4. A viewing window 3 is provided inside the chamber door 2. A grinding wheel frame 6 is provided on the upper inner wall of the working chamber 4. A grinding wheel cover 7 is fixedly connected to the lower wall of the grinding wheel frame 6. A CBN grinding wheel 8 is rotatably connected to the inner wall of the grinding wheel cover 7. Two sets of fixed pipes 10 are fixedly connected to the front wall of the grinding wheel frame 6 through a fixed seat 9. The upper and lower ends of the fixed pipes 10 pass through the upper and lower side walls of the fixed seat 9, respectively. A coolant inlet pipe 11 is fixedly connected to the upper end of the fixed pipe 10.

[0031] To adjust the cooling effect, the ends of the two sets of coolant inlet pipes 11 furthest from the fixed pipe 10 are each connected to a set of cooling pumps. Both sets of cooling pumps are located inside the coolant storage tank. A coolant nozzle 13 is fixedly connected to the lower end of the fixed pipe 10. The outer walls of both sets of fixed pipes 10 are equipped with flow control structures for controlling the coolant flow rate. These flow control structures include two sets of electrically controlled flow valves 12, each fixedly connected to the outer wall of one set of fixed pipes 10. The electrically controlled flow valves 12 are positioned between the fixed base 9 and the coolant nozzle 13. The coolant nozzle 13 sprays... The flow rate is controlled by the electronically controlled flow valve 12. During operation, one of the two sets of cooling pumps is activated first, and the flow rate of the coolant is controlled by the electronically controlled flow valve 12. When the temperature detection structure detects that the temperature of the coolant flowing out of the grinding area is too high, the CNC system controls the electronically controlled flow valve 12 to increase the coolant flow rate. When the maximum flow rate of one set of cooling pumps is still insufficient to meet the cooling effect, the CNC system immediately starts the other set of cooling pumps. The two sets of cooling pumps are activated simultaneously to force cooling of the grinding area, avoid overheating and expansion of the CBN grinding wheel 8, and avoid high-temperature burns on the broach body 5.

[0032] To reduce clogging, the rear wall of the grinding wheel cover 7 is provided with a grinding wheel cleaning structure for cleaning the CBN grinding wheel 8 and a dust suction structure for removing dust generated after cleaning the CBN grinding wheel 8, arranged vertically. The grinding wheel cleaning structure is connected to a high-pressure air supply device. The grinding wheel cleaning structure includes a compressed air nozzle 20 and an air inlet pipe 14. The compressed air nozzle 20 is fixedly connected to the inner rear wall of the grinding wheel cover 7 and is located above the axis of the CBN grinding wheel 8. The compressed air nozzle 20 has an air jet chamber 2001 inside. 1. The air outlet direction is tangent to the outer circumference of the CBN grinding wheel 8. The air inlet pipe 14 is fixedly connected to the rear wall of the grinding wheel cover 7. One end of the air inlet pipe 14 facing the grinding wheel cover 7 is connected to the inside of the air jet chamber 2001. The other end of the air inlet pipe 14 away from the grinding wheel cover 7 is connected to the high-pressure air supply device. The high-pressure air supply device generates high-pressure air. The high-pressure air is sprayed out along the air inlet pipe 14 and the compressed air nozzle 20 toward the surface of the CBN grinding wheel 8 to clean the surface of the CBN grinding wheel 8, avoid clogging the air holes on the surface of the grinding wheel, effectively reduce the number of grinding wheel repairs, and improve production efficiency.

[0033] To remove dust generated during the operation of the grinding wheel cleaning structure, a dust collection structure is connected to a dust collection device. The dust collection structure includes a dust collection pipe 15 and a dust collection hood 16. The dust collection hood 16 is fixedly connected to the rear wall of the grinding wheel cover 7 and located below the grinding wheel cleaning structure. The front wall of the dust collection hood 16 penetrates the rear wall of the grinding wheel cover 7 and communicates with the interior of the grinding wheel cover 7. The dust collection pipe 15 is fixedly connected to the rear wall of the dust collection hood 16. The end of the dust collection pipe 15 away from the dust collection hood 16 is connected to the dust collection device. The dust collection device creates a negative pressure inside the dust collection hood 16 through the dust collection pipe 15. The suction range of the dust collection hood 16 covers the interior of the grinding wheel cover 7. All floating dust generated during the cleaning process of the grinding wheel cleaning structure is sucked away by the dust collection device.

[0034] To prevent the slider 18 from reversing and causing the temperature sensing structure to not face the coolant, the grinding wheel cover 7 is fixedly connected to the connecting frame 17. The front wall of the connecting frame 17 is slidably connected to the slider 18 through the guide structure. The guide structure includes two sets of guide rods 22, which are distributed left and right and fixedly connected to the rear wall of the slider 18. The ends of the two sets of guide rods 22 away from the slider 18 pass through the connecting frame 17 and are slidably connected to the connecting frame 17. The slider 18 is slidably connected to the connecting frame 17 through the two sets of guide rods 22. When the slider 18 is driven to move back and forth by the electric telescopic rod 21, it is guided by the two sets of guide rods 22 to keep moving only back and forth and not reverse, ensuring that the sensing surface of the temperature sensor 19 always faces the coolant.

[0035] To prevent the temperature sensing structure from being bumped when loading and unloading workpieces, a telescopic drive structure for driving the slider 18 to move back and forth is provided between the slider 18 and the connecting frame 17. The telescopic drive structure is an electric telescopic rod 21, which is fixedly connected to the lower wall of the connecting frame 17. The end of the extension shaft of the electric telescopic rod 21 is fixedly connected to the rear wall of the slider 18. When loading and unloading workpieces, the electric telescopic rod 21 drives the slider 18 to retract below the grinding wheel cover 7, which can prevent the temperature sensor 19 from being bumped. During processing, the extension shaft of the electric telescopic rod 21 extends, driving the slider 18 and the temperature sensor 19 to move forward, so that the temperature sensor 19 can come into contact with the coolant.

[0036] To monitor the cooling effect of the coolant in real time, a temperature detection structure for detecting the coolant temperature is provided on the front wall of the slider 18. The temperature detection structure is a temperature sensor 19, which is fixedly connected to the front wall of the slider 18. The temperature sensor 19 consists of a detection seat 1901 and a detection patch 1902. The detection seat 1901 is fixedly connected to the front wall of the slider 18. An inclined surface is provided between the end of the detection seat 1901 away from the slider 18 and the upper wall of the detection seat 1901. The detection patch 1902 is placed on the upper wall of the inclined surface. During the processing, the temperature of the coolant is detected by the detection patch 1902, which is in contact with the coolant, and the data is transmitted back to the CNC system. The CNC system then analyzes the current cooling effect.

[0037] This embodiment also proposes a broach for gear machining, including a broach body 5, which is machined by the finishing device of any of the broaches for gear machining mentioned above.

[0038] Working principle: During operation, the temperature of the coolant is detected by the detection patch 1902 in contact with the coolant and transmitted back to the CNC system. The CNC system analyzes the current cooling effect. One set of two cooling pumps is activated first, and the coolant flow rate is controlled by the electronically controlled flow valve 12. When the temperature detection structure detects that the temperature of the coolant flowing out of the grinding area is too high, the CNC system controls the electronically controlled flow valve 12 to increase the coolant flow rate. When the maximum flow rate of one set of cooling pumps is still insufficient to achieve the desired cooling effect, the CNC system immediately starts the other set of cooling pumps. The simultaneous operation of two sets of cooling pumps forces cooling of the grinding area, preventing the CBN grinding wheel 8 from overheating and expanding, and preventing the broach body 5 from being burned by high temperature. The end of the air inlet pipe 14 away from the grinding wheel cover 7 is connected to a high-pressure air supply device. The high-pressure air supply device generates high-pressure air, which is sprayed along the air inlet pipe 14 and the compressed air nozzle 20 towards the outer circumference of the CBN grinding wheel 8. The surface of the CBN grinding wheel 8 is cleaned to prevent pores from clogging the surface, effectively reducing the number of grinding wheel repairs and improving production efficiency. The end of the suction pipe 15 away from the dust hood 16 is connected to the dust collection device. The dust collection device creates a negative pressure inside the dust hood 16 through the suction pipe 15. The suction range of the dust hood 16 covers the inside of the grinding wheel cover 7. All the floating dust generated during the cleaning process of the grinding wheel cleaning structure is sucked away by the dust collection device. When loading and unloading workpieces, the electric telescopic rod 21 drives the slider 18 to retract below the grinding wheel cover 7, which can prevent the temperature sensor 19 from being bumped. During processing, the extension shaft of the electric telescopic rod 21 extends, driving the slider 18 and the temperature sensor 19 to move forward, so that the temperature sensor 19 can contact the coolant. When the slider 18 is driven back and forth by the electric telescopic rod 21, it is guided by two sets of guide rods 22 to keep it moving only back and forth and not reverse, ensuring that the detection surface of the temperature sensor 19 always faces the coolant.

[0039] By configuring two sets of cooling pumps, two sets of electrically controlled flow valves 12, and a temperature sensor 19 for detecting the coolant temperature, the detection patch 1902 in the temperature sensor 19 detects the coolant temperature through heat conduction. When the coolant cooling effect is insufficient, the flow rate of the coolant is increased in time through the electrically controlled flow valve 12 to improve the cooling effect. If necessary, the two sets of cooling pumps can be activated simultaneously for forced cooling, which greatly improves the cooling effect, improves the machining accuracy, and ensures the cooling effect. At the same time, it not only ensures the machining accuracy, but also avoids the expansion of the CBN grinding wheel caused by high temperature.

[0040] A compressed air nozzle 20 and a dust suction hood 16 are installed on the rear wall of the grinding wheel cover 7. High-pressure air is supplied to the jet chamber 2001 inside the compressed air nozzle 20 through a high-pressure air supply device. The high-pressure air is sprayed onto the surface of the CBN grinding wheel 8 through the jet chamber outlet 2001 to clean the surface of the CBN grinding wheel 8. This can effectively reduce the phenomenon of hole blockage, maintain the service life of the CBN grinding wheel 8, and reduce the frequency of grinding wheel repair. At the same time, the dust inside the grinding wheel cover 7 is sucked away by the dust suction device, dust suction pipe 15 and dust suction hood 16 to reduce floating dust and prevent dust from adhering to the grinding wheel surface and entering the grinding area, thereby effectively improving the machining accuracy of the broach body 5.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A finishing apparatus for a broach used in gear machining, characterized in that: The device includes a bed (1), a drive unit, a CNC system, a clamping device, a coolant storage tank, a high-pressure air supply unit, a dust collection unit, and two sets of cooling pumps. The bed (1) has a working chamber (4) inside. The front wall of the working chamber (4) is slidably connected to a door (2). The door (2) has a viewing window (3) inside. The upper inner wall of the working chamber (4) is provided with a grinding wheel frame (6). The lower wall of the grinding wheel frame (6) is fixedly connected to a grinding wheel cover (7). The inner wall of the grinding wheel cover (7) is rotatably connected to a CBN grinding wheel (8). The front wall of the grinding wheel frame (6) is fixedly connected to two sets of fixed pipes (10) through a fixed seat (9). The upper and lower ends of the fixed pipes (10) respectively penetrate the upper and lower side walls of the fixed seat (9). The upper end of the fixed pipes (10) is fixedly connected to a coolant inlet pipe (11). The ends of the two sets of coolant inlets (11) away from the fixed pipes (10) are respectively connected to a set of cooling pumps. Both sets of cooling pumps are installed inside the coolant storage tank. The lower end of the fixed pipe (10) is fixedly connected to a coolant nozzle (13). The outer walls of both sets of fixed pipes (10) are provided with a flow control structure for controlling the coolant flow rate. The rear wall of the grinding wheel cover (7) is provided with a grinding wheel cleaning structure for cleaning the CBN grinding wheel (8) and a dust suction structure for sucking away the dust generated after cleaning the CBN grinding wheel (8). The grinding wheel cleaning structure is connected to a high-pressure air supply device, and the dust suction structure is connected to a dust suction device. The grinding wheel cover (7) is fixedly connected to a connecting frame (17). The front wall of the connecting frame (17) is slidably connected to a slider (18) through a guide structure. A telescopic drive structure for driving the slider (18) to move back and forth is provided between the slider (18) and the connecting frame (17). The front wall of the slider (18) is provided with a temperature detection structure for detecting the coolant temperature.

2. The finishing apparatus for a broach used in gear machining according to claim 1, characterized in that: The flow control structure includes two sets of electrically controlled flow valves (12). The two sets of electrically controlled flow valves (12) are respectively fixedly connected to the outer wall of a set of fixed pipes (10). The electrically controlled flow valves (12) are set between the fixed seat (9) and the coolant nozzle (13). The flow rate of the coolant nozzle (13) is controlled by the electrically controlled flow valves (12).

3. The finishing apparatus for a broach used in gear machining according to claim 2, characterized in that: The grinding wheel cleaning structure includes a compressed air nozzle (20) and an air inlet pipe (14). The compressed air nozzle (20) is fixedly connected to the inner rear wall of the grinding wheel cover (7). The compressed air nozzle (20) is located above the axis of the CBN grinding wheel (8). The compressed air nozzle (20) has a jet chamber (2001) inside. The air outlet direction of the jet chamber (2001) is tangent to the outer circumference of the CBN grinding wheel (8). The air inlet pipe (14) is fixedly connected to the rear wall of the grinding wheel cover (7). One end of the air inlet pipe (14) facing the grinding wheel cover (7) is connected to the inside of the jet chamber (2001). The other end of the air inlet pipe (14) away from the grinding wheel cover (7) is connected to a high-pressure air supply device.

4. The finishing apparatus for a broach used in gear machining according to claim 3, characterized in that: The dust collection structure includes a dust collection pipe (15) and a dust collection hood (16). The dust collection hood (16) is fixedly connected to the rear wall of the grinding wheel cover (7) and located below the grinding wheel cleaning structure. The front wall of the dust collection hood (16) penetrates the rear wall of the grinding wheel cover (7) and communicates with the interior of the grinding wheel cover (7). The dust collection pipe (15) is fixedly connected to the rear wall of the dust collection hood (16). The end of the dust collection pipe (15) away from the dust collection hood (16) is connected to the dust collection device.

5. The finishing apparatus for a broach used in gear machining according to claim 4, characterized in that: The guide structure includes two sets of guide rods (22). The two sets of guide rods (22) are arranged in a left-right manner and fixedly connected to the rear wall of the slider (18). The ends of the two sets of guide rods (22) away from the slider (18) pass through the connecting frame (17) and are slidably connected to the connecting frame (17). The slider (18) is slidably connected to the connecting frame (17) through the two sets of guide rods (22).

6. The finishing apparatus for a broach used in gear machining according to claim 5, characterized in that: The telescopic drive structure is an electric telescopic rod (21), which is fixedly connected to the lower wall of the connecting frame (17), and the end of the electric telescopic rod (21) extending from the shaft is fixedly connected to the rear wall of the slider (18).

7. The finishing apparatus for a broach used in gear machining according to claim 6, characterized in that: The temperature detection structure is a temperature sensor (19), which is fixedly connected to the front wall of the slider (18). The temperature sensor (19) consists of a detection seat (1901) and a detection patch (1902). The detection seat (1901) is fixedly connected to the front wall of the slider (18). An inclined surface is provided between the end of the detection seat (1901) away from the slider (18) and the upper wall of the detection seat (1901). The detection patch (1902) is disposed on the upper wall of the inclined surface.

8. A broach for gear machining, characterized in that: Includes a broach body (5), which is machined by a finishing apparatus for a gear machining broach as described in any one of claims 1 to 7.

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