Machining method of bevel gear

Abstract

The invention discloses a bevel gear machining method, which relates to the technical field of gear machining, and is characterized by comprising the following steps of material selection machining, gear milling machining, heat treatment, gear grinding machining, gear lapping machining, gear machining, material machining, cutting machining and gear assembly. The machining method of the bevel gear is coherent and orderly in step, high in automation degree and high in machining efficiency, the connecting area between the shaft and the shaft hole can be increased through matching of the concave hole and the arc-shaped protrusion, and therefore the area of the matching face is increased, the connecting firmness of the shaft and the gear is improved, the shaft is prevented from loosening, the connecting reliability of the gear and the shaft is greatly improved, and the service life of the gear is prolonged. And therefore, the bevel gear has better durability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear machining, in particular to a machining method of bevel gears. BACKGROUND

[0002] The bevel gear is also called a bevel gear, which is widely used in industrial transmission equipment such as vehicle differential, locomotive, ship, power plant, steel plant and railway track detection. Generally, it can be divided into various structures according to the number of teeth, modulus, pressure angle, addendum height, dedendum height, face taper angle, split taper angle, root taper angle, back taper distance, crown distance, installation distance, fixed chord tooth thickness, fixed chord tooth height, displacement coefficient and side gap.

[0003] At present, the bevel gear usually includes a bevel gear and a shaft, and in the existing bevel gear machining process, there are processes of integrally forming the bevel gear and the shaft and processes of separately manufacturing the bevel gear and the shaft. The process of integrally forming the bevel gear and the shaft is to design the bevel gear and the shaft as a whole without connecting structure between them, so that the structure is compact and the strength is high, which is suitable for high load and high speed occasions, but when any one of the bevel gear and the shaft is damaged, the whole is damaged, the service life is short, and the process of separately manufacturing the bevel gear and the shaft is to process the bevel gear and the shaft separately and then assemble them together through a connecting structure, so that the material utilization rate is high, the bevel gear can be replaced when it fails, and the whole shaft does not need to be replaced, the service life is long, and therefore it is a commonly used machining method of bevel gears.

[0004] In the existing process of separately manufacturing the bevel gear, the interference fit is one of the commonly used connection methods. The interference fit is to make the shaft hole diameter of the bevel gear smaller than the shaft diameter of the shaft, and when assembled, the two are forcibly combined through external force or temperature change, and after assembly, the load is transmitted by the friction force generated by the elastic deformation of the material, which has the advantages of simple structure, strong bearing capacity and good centering, but under the action of alternating load, the contact surface of the interference fit may be damaged, which will cause wear and fatigue failure of the contact surface, cause the shaft to loosen, and thus the connection reliability of the bevel gear and the shaft is reduced and the durability is poor. SUMMARY

[0005] The purpose of the present application is to provide a machining method of bevel gears to solve the above problems.

[0006] The present application achieves the above-mentioned purpose by the following technical scheme, a machining method of bevel gears, comprising the following steps: 1) material selection and processing: selecting 20CrMnTi steel as a blank, and processing the blank by turning to make a tooth blank; 2) gear milling: the tooth blank made by step 1) is clamped and fixed on a clamping tool, and then a gear milling machine is used to process the tooth blank by the generating method to realize the rough machining of the gear tooth profile; 3) heat treatment: the tooth blank after step 2) is removed from the clamping tool, and then the tooth blank is subjected to medium temperature tempering, and then rapid cooling; 4) gear grinding: the tooth blank after step 3) is placed on the numerical control gear grinding machine, and the numerical control gear grinding machine is used to grind the tooth blank; 5) gear grinding: the tooth blank after step 4) is placed on the gear grinding machine, the grinding plate is matched with the surface of the tooth blank, the liquid abrasive is sent into the grinding plate and the tooth blank by pressure, the tooth blank is driven to rotate, and the tooth blank is ground by the grinding plate to form the gear; 6) gear processing: the gear made by step 5) is clamped and fixed on the clamping tool, and the inner surface of the shaft hole of the gear is cut by milling until the arc protrusion is formed; 7) material processing: the alloy steel strip is selected as the raw material, and the alloy steel strip is placed on the automatic punching processing line, and a plurality of recesses are punched on the side wall of the alloy steel strip in order by the stamping die; 8) cutting: the alloy steel strip after step 7) is cut into a blank by the automatic cutting machine, and then the blank is turned into a shaft; 9) gear assembly: the gear after step 6) and the shaft after step 8) are combined and connected by interference fit, one end of the shaft is inserted into the shaft hole of the gear, and then pressure is applied to the shaft to press the one end of the shaft into the shaft hole, and the arc protrusion is matched with the recess to form the bevel gear.

[0007] As a further setting of the application, the automatic punching processing line comprises a feeding frame, a working frame and a discharging frame, a plurality of stamping dies and a pressure mechanism for driving the stamping dies to open and close are arranged on the working frame, a plurality of feeding clamps and a lifting mechanism for driving the feeding clamps to move up and down are arranged on the working frame, a plurality of material supporting seats and a pushing mechanism for driving the material supporting seats to move towards the feeding clamps are arranged on the working frame.

[0008] As a further setting of the application, the feeding clamp comprises a clamping jaw and an opening and closing assembly for driving the clamping jaw to open and close.

[0009] As a further setting of the application, the opening and closing assembly comprises a machine shell, a first air cylinder is arranged on the machine shell, a first push rod is arranged on the first air cylinder, a push block extending into the machine shell is connected to the first push rod, a first arm lever is hinged to the middle position of the push block, a second arm lever is hinged to the end of the push block away from the first push rod, the clamping jaw comprises a first jaw body hinged to the first arm lever and a second jaw body hinged to the second arm lever, and the first jaw body and the second jaw body are hinged in the machine shell.

[0010] As a further arrangement of the present application, the lifting mechanism comprises a support fixed on the working frame, a second cylinder is arranged on the support, a second push rod is arranged on the second cylinder, and a supporting beam is connected to the second push rod, and the feeding clamp is fixedly installed on the supporting beam.

[0011] As a further arrangement of the present application, the pushing mechanism comprises a third cylinder fixedly installed on the working frame, a third push rod is arranged on the third cylinder, and the material supporting seat is fixedly connected to the third push rod.

[0012] As a further arrangement of the present application, a feeding track communicating with the feeding frame is arranged on the working frame, the feeding track comprises a fixed plate and a movable plate, a turnover mechanism for driving the turnover of the movable plate is arranged on the working frame, the turnover mechanism comprises a fourth cylinder fixedly connected to the working frame, a fourth push rod is arranged on the fourth cylinder, and the fourth push rod is hingedly connected to the movable plate.

[0013] As a further arrangement of the present application, a feeding mechanism is arranged on the working frame, the feeding mechanism comprises a frame, a lifting arm is hingedly connected to the frame, one end of the lifting arm away from the frame is hingedly connected to the discharging frame, a fifth cylinder is arranged on the working frame, a fifth push rod is arranged on the fifth cylinder, and the fifth push rod is hingedly connected to the frame.

[0014] As a further arrangement of the present application, a driving motor is arranged on the frame, an output end of the driving motor is connected with a rotating shaft, the rotating shaft is rotatably connected inside the frame, a driving pulley and a driven pulley are rotatably connected to the two side walls of the frame, a conveying belt is connected between the driving pulley and the driven pulley, and the driving pulley is fixedly connected to the two ends of the rotating shaft, respectively.

[0015] As a further arrangement of the present application, a guide mechanism is arranged between the feeding frame and the feeding track, the guide mechanism comprises a support table, a driving guide wheel and a rotating motor for driving the rotation of the driving guide wheel are rotatably connected to the support table, a plurality of first guide wheels are arranged on one side of the driving guide wheel on the support table, and a plurality of second guide wheels are arranged on the other side, and the first guide wheels, the driving guide wheel and the second guide wheels are connected together through connecting gears.

[0016] In summary, the present application has the following advantages: 1. The processing method steps of the present application are coherent and orderly, the degree of automation is high, the processing efficiency is high, the connection area between the shaft and the shaft hole can be increased through the cooperation of the concave hole and the arc-shaped protrusion, thereby increasing the fitting surface area and improving the connection firmness of the shaft and the gear, so as to prevent the shaft from loosening and greatly improve the connection reliability of the gear and the shaft, thereby making the bevel gear have good durability; 2, The automatic punching processing line of the application can input alloy steel strip from the feeding rack to the working rack, then the alloy steel strip in the working rack can be supported by the material supporting seat, and then pushed to the position below the feeding clamp by the pushing mechanism, then the feeding clamp can be driven to move down by the lifting mechanism until the alloy steel strip is clamped, then continue to drop until the alloy steel strip is sent into the stamping die, then release the alloy steel strip, and then drive the stamping die to close by the pressure mechanism to punch the alloy steel strip, so that a plurality of recessed holes are punched in order on the side wall of the alloy steel strip, which is convenient to operate, high in punching efficiency and can ensure the punching accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the automatic punching processing line in the application is shown Figure 1 ; Figure 2 The structure of the automatic punching processing line in the application is shown Figure 1 ; Figure 3 The local structure of the feeding clamp in the application is shown Figure 4 The structure of the automatic punching processing line in the application is shown Figure 2 ; Figure 5 The structure of the automatic punching processing line in the application is shown Figure 4 ; Figure 6 The structure of the automatic punching processing line in the application is shown Figure 3 ; Figure 7 The structure of the automatic punching processing line in the application is shown Figure 6 ;

[0018] Fig. 1 is a feeding rack; Fig. 2 is a working rack; Fig. 3 is a discharging rack; Fig. 4 is a stamping die; Fig. 5 is a pressure mechanism; Fig. 6 is a material supporting seat; Fig. 7 is a machine shell; Fig. 8 is a first cylinder; Fig. 9 is a push block; Fig. 10 is a first arm rod; Fig. 11 is a second arm rod; Fig. 12 is a first claw body; Fig. 13 is a second claw body; Fig. 14 is a support; Fig. 15 is a second cylinder; Fig. 16 is a supporting beam; Fig. 17 is a third cylinder; Fig. 18 is a fixed plate; Fig. 19 is a movable plate; Fig. 20 is a fourth cylinder; Fig. 21 is a frame; Fig. 22 is a lifting arm; Fig. 23 is a fifth cylinder; Fig. 24 is a driving motor; Fig. 25 is a rotating shaft; Fig. 26 is a driving pulley; Fig. 27 is a driven pulley; Fig. 28 is a conveyor belt; Fig. 29 is a driving guide wheel; Fig. 30 is a rotating motor; Fig. 31 is a first guide wheel; Fig. 32 is a second guide wheel. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] A bevel gear machining method, comprising the following steps: 1) material selection and machining: selecting 20CrMnTi steel as a blank, and machining the blank by turning to form a tooth blank, which has high strength and hardness; 2) gear milling machining: clamping and fixing the tooth blank formed in step 1) on a clamping tool, and then using a gear milling machine to machine the tooth blank by the generating method to realize rough machining of the gear tooth profile; 3) heat treatment: disassembling the tooth blank after step 2) from the clamping tool, and then carrying out medium-temperature tempering on the tooth blank, and rapidly cooling after the treatment is completed; 4) gear grinding machining: re-placing the tooth blank after step 3) on a numerical control gear grinding machine, and using the numerical control gear grinding machine to grind the tooth blank; 5) gear lapping machining: placing the tooth blank after step 4) on a gear lapping machine, first matching the lapping plate with the surface of the tooth blank, then sending the liquid abrasive into the lapping plate and the tooth blank by pressure, driving the tooth blank to rotate, and lapping the tooth blank by the lapping plate to form a gear; 6) gear machining: clamping and fixing the gear formed in step 5) on a clamping tool, and cutting the inner surface of the shaft hole of the gear by milling until an arc-shaped protrusion is formed; 7) material machining: selecting an alloy steel strip as a raw material, and placing the alloy steel strip on an automatic punching machining line to orderly punch a plurality of recesses on the side wall of the alloy steel strip through a stamping die 4; 8) cutting machining: first cutting the alloy steel strip after step 7) in an automatic cutting machine to form a blank, and then turning the blank to form a shaft; 9) gear assembly: combining and connecting the gear after step 6) and the shaft formed in step 8) by interference fit, inserting one end of the shaft into the shaft hole of the gear, and then applying pressure to the shaft to press the one end of the shaft into the shaft hole, and at the same time, making the arc-shaped protrusion cooperate with the recess to form a bevel gear.

[0021] The machining method process of material selection processing, gear milling processing, heat treatment, gear grinding processing, gear research processing, gear machining, material processing, cutting processing and gear assembly is adopted, the steps are coherent and orderly, the degree of automation is high, the processing efficiency is high, in the gear machining step, the inner surface of the shaft hole of the gear is cut by milling processing, so that an arc protrusion is formed on the inner surface of the shaft hole, in the material processing step, the alloy steel strip is placed on the automatic punching processing line, a plurality of concave holes are punched in order on the side wall of the alloy steel strip through the stamping die 4, then the alloy steel strip is cut into sections through the cutting processing step and is turned into a shaft, finally, the gear and the shaft are connected together through interference fit in the gear assembly step, when the shaft is inserted into the shaft hole, the arc protrusion will be embedded in the concave hole, through the cooperation of the concave hole and the arc protrusion, the connecting area between the shaft and the shaft hole can be increased, so that the area of the matching surface is increased, the connection firmness of the shaft and the gear is improved, so that the shaft is prevented from loosening, the connection reliability of the gear and the shaft is greatly improved, so that the bevel gear has good durability.

[0022] Please refer to Figure 1 、 Figure 4 、 Figure 6 The automatic punching processing line includes a feeding frame 1, a working frame 2 and a discharging frame 3, a plurality of stamping dies 4 and a pressure mechanism 5 for driving the stamping dies 4 to open and close are arranged on the working frame 2, the stamping die 4 includes an upper die and a lower die, a die core is arranged on one side of the upper die facing the lower die, the die core is an arc-shaped protruding structure, a plurality of feeding clamps and a lifting mechanism for driving the feeding clamps to move up and down are arranged on the working frame 2, and a plurality of material supporting seats 6 and a pushing mechanism for driving the material supporting seats 6 to move towards the feeding clamps are arranged on the working frame 2, so that when the equipment is used, the alloy steel strip can be input from the feeding frame 1 to the working frame 2, the alloy steel strip entering the working frame 2 can be supported by the material supporting seat 6, and then pushed to the position below the feeding clamp by the pushing mechanism, the feeding clamp can be driven to move down by the lifting mechanism until the alloy steel strip is clamped, then continue to descend until the alloy steel strip is sent into the stamping die 4, then release the alloy steel strip, and then drive the stamping die 4 to close through the pressure mechanism 5 to punch the alloy steel strip, so that a plurality of concave holes are punched in order on the side wall of the alloy steel strip, the operation is more convenient, the punching efficiency is higher, and the punching precision can be ensured.

[0023] Please refer to Figure 1 、 Figure 2As shown, the feeding clamp comprises a clamping jaw and an opening and closing assembly for driving the clamping jaw to open and close, and the alloy steel strip can be clamped or released by driving the clamping jaw to open or close, which is convenient and simple to operate. The opening and closing assembly comprises a casing 7, a first cylinder 8 is arranged on the casing 7, a first push rod is arranged on the first cylinder 8, a push block 9 extending into the casing 7 is connected to the first push rod, a first arm rod 10 is hinged to the middle position of the push block 9, a second arm rod 11 is hinged to the end of the push block 9 away from the first push rod, the clamping jaw comprises a first jaw body 12 hinged to the first arm rod 10 and a second jaw body 13 hinged to the second arm rod 11, and the first jaw body 12 and the second jaw body 13 are hinged in the casing 7. By starting the first cylinder 8, the first push rod is elongated or shortened to drive the push block 9 to slide in the casing 7, thereby driving the first arm rod 10 and the second arm rod 11 to rotate, and the first jaw body 12 and the second jaw body 13 are pulled to approach or move away from each other, thereby realizing clamping or releasing, which is convenient to operate and has good clamping stability.

[0024] Please refer to Figure 1 As shown, the lifting mechanism comprises a support 14 fixed on the working rack 2, a second cylinder 15 is arranged on the support 14, a second push rod is arranged on the second cylinder 15, and a supporting beam 16 is connected to the second push rod, and the feeding clamp is fixedly installed on the supporting beam 16. By starting the second cylinder 15, the second push rod is elongated or shortened to drive the supporting beam 16 to rise or fall, thereby driving the feeding clamp to move up and down, which is efficient. The pushing mechanism comprises a third cylinder 17 fixedly installed on the working rack 2, a third push rod is arranged on the third cylinder 17, and the material supporting seat 6 is fixedly connected to the third push rod. By starting the third cylinder 17, the third push rod is elongated or shortened to drive the material supporting seat 6 to move, thereby pushing the alloy steel strip to the feeding clamp, so that the alloy steel strip can be supported by the material supporting seat 6 to avoid sliding.

[0025] Please refer to Figure 1 、 Figure 6 、 Figure 7As shown, the working rack 2 is provided with a feeding track communicated with the feeding rack 1, the feeding track comprises a fixed plate 18 and a movable plate 19, a turnover mechanism for driving the movable plate 19 to overturn is arranged on the working rack 2, the turnover mechanism comprises a fourth cylinder 20 fixedly connected on the working rack 2, a fourth push rod is arranged on the fourth cylinder 20 and is hingedly connected with the movable plate 19, then after the alloy steel strip enters the feeding track, the fourth cylinder 20 can be started to control the fourth push rod to shorten, so as to drive the movable plate 19 to overturn, so that the alloy steel strip can slide down and be supported by the supporting seat 6, and after the operation is completed, the fourth push rod can be controlled to lengthen, so as to drive the movable plate 19 to overturn and reset, and the feeding track is reassembled, a guide mechanism is arranged between the feeding rack 1 and the feeding track, the guide mechanism comprises a support table, a driving guide wheel 29 and a rotating motor 30 for driving the driving guide wheel 29 to rotate are rotatably connected on the support table, a plurality of first guide wheels 31 are arranged on one side of the support table and a plurality of second guide wheels 32 are arranged on the other side, the first guide wheels 31, the driving guide wheel 29 and the second guide wheels 32 are connected together through connecting gears, then in the process that the alloy steel strip enters the feeding track from the feeding rack 1, the rotating motor 30 can be started to drive the driving guide wheel 29 to rotate, then the driving guide wheel 29 can drive the first guide wheels 31 and the second guide wheels 32 to rotate synchronously through the gears, so as to guide the alloy steel strip and facilitate the transmission of the alloy steel strip.

[0026] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5As shown, the feeding mechanism is arranged on the working frame 2, the feeding mechanism comprises a frame 21, and a lifting arm 22 is hinged on the frame 21, one end of the lifting arm 22 away from the frame 21 is hinged on the discharging frame 3, a fifth cylinder 23 is arranged on the working frame 2, and a fifth push rod is arranged on the fifth cylinder 23, the fifth push rod is hinged with the frame 21, then after the punching of the alloy steel strip is finished, the fifth cylinder 23 can be started to drive the fifth push rod to elongate, so as to push the frame 21 upwards, so that the lifting arm 22 is lifted, and the frame 21 is suspended below the feeding clamp, then the feeding clamp can be controlled to release the alloy steel strip, and the alloy steel strip is placed on the frame 21, so as to realize feeding, a driving motor 24 is arranged on the frame 21, a rotating shaft 25 is connected to the output end of the driving motor 24, the rotating shaft 25 is rotatably connected in the frame 21, a driving pulley 26 and a driven pulley 27 are rotatably connected on the two side walls of the frame 21, and a conveying belt 28 is connected between the driving pulley 26 and the driven pulley 27, the driving pulley 26 is fixedly connected at both ends of the rotating shaft 25, then when the alloy steel strip is placed on the frame 21, the driving motor 24 can be started to drive the driving pulley 26 to rotate through the rotating shaft 25, then the driving pulley 26 can drive the driven pulley 27 to rotate through the conveying belt 28, and the driving pulley 26 and the driven pulley 27 are cooperatively rotated to stably drive the conveying belt 28 to convey the alloy steel strip from the frame 21 to the discharging frame 3, and the discharging operation is more convenient and efficient.

[0027] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that some improvements and decorations made by ordinary skilled in the art without departing from the principles of the present application should also be considered as the protection scope of the present application.

Claims

1. A method for machining bevel gears, characterized in that: Includes the following steps: 1) Material selection and processing: 20CrMnTi steel is selected as the blank, and the blank is processed by turning to make a gear blank; 2) Gear milling: The gear blank prepared in step 1) is placed on a clamping fixture for clamping and fixing. Then, a gear milling machine is used to process the gear blank using the generating method to achieve rough machining of the gear tooth profile. 3) Heat treatment: First, remove the tooth blank after step 2) from the clamping fixture, then temper the tooth blank at a medium temperature, and then cool it down quickly after the treatment is completed. 4) Gear grinding: The gear blank processed in step 3) is placed back on the CNC gear grinding machine and ground. 5) Gear grinding: The gear blank after step 4) is placed on a gear grinding machine. First, the grinding plate is fitted with the surface of the gear blank. Then, liquid abrasive is fed between the grinding plate and the gear blank under pressure to drive the gear blank to rotate. The gear blank is ground by the grinding plate to make a gear. 6) Gear machining: Place the gear made in step 5) on a clamping fixture for clamping and fixing. Use milling to cut the inner surface of the gear shaft hole until an arc-shaped protrusion is formed. 7) Material processing: Alloy steel strips are selected as raw materials. The alloy steel strips are placed on an automatic punching processing line and multiple concave holes are punched out in an orderly manner on the side wall of the alloy steel strips by a stamping die (4). 8) Machining: First, place the alloy steel strip processed in step 7) into an automatic cutting machine to cut it into a blank, and then turn the blank to make a shaft; 9) Gear assembly: The gear processed in step 6) is combined with the shaft made in step 8) by interference fit. One end of the shaft is inserted into the shaft hole of the gear, and then pressure is applied to the shaft to press one end of the shaft into the shaft hole, so that the arc-shaped protrusion and the concave hole are matched to form a bevel gear.

2. The method for machining a bevel gear according to claim 1, characterized in that: The automatic punching processing line includes a feeding frame (1), a working frame (2) and an unloading frame (3). The working frame (2) is provided with a number of stamping dies (4) and a pressure mechanism (5) for driving the stamping dies (4) to open and close. The working frame (2) is provided with a number of feeding fixtures and a lifting mechanism for driving the feeding fixtures to move up and down. The working frame (2) is provided with a number of material support seats (6) and a pushing mechanism for driving the material support seats (6) to move towards the feeding fixtures.

3. The method for machining a bevel gear according to claim 2, characterized in that: The feeding fixture includes grippers and an opening / closing assembly for driving the grippers to open and close.

4. The method for machining a bevel gear according to claim 3, characterized in that: The opening and closing assembly includes a housing (7), on which a first cylinder (8) is provided, and on which a first push rod is provided. A push block (9) extending into the housing (7) is connected to the first push rod. A first arm (10) is hinged to the middle position of the push block (9), and a second arm (11) is hinged to the end of the push block (9) away from the first push rod. The gripper includes a first claw body (12) hinged to the first arm (10) and a second claw body (13) hinged to the second arm (11). Both the first claw body (12) and the second claw body (13) are hinged inside the housing (7).

5. A method for machining bevel gears according to claim 2, characterized in that: The lifting mechanism includes a bracket (14) fixed on the working frame (2), a second cylinder (15) is provided on the bracket (14), a second push rod is provided on the second cylinder (15), a support beam (16) is connected to the second push rod, and the feeding clamp is fixedly installed on the support beam (16).

6. A method for machining bevel gears according to claim 2, characterized in that: The pushing mechanism includes a third cylinder (17) fixedly installed on the working frame (2), a third push rod is provided on the third cylinder (17), and the material support (6) is fixedly connected to the third push rod.

7. A method for machining bevel gears according to claim 2, characterized in that: The working frame (2) is provided with a feeding track that communicates with the feeding frame (1). The feeding track includes a fixed plate (18) and a movable plate (19). The working frame (2) is provided with a flipping mechanism for driving the movable plate (19) to flip. The flipping mechanism includes a fourth cylinder (20) fixedly connected to the working frame (2). The fourth cylinder (20) is provided with a fourth push rod, which is hinged to the movable plate (19).

8. A method for machining bevel gears according to claim 2, characterized in that: The working frame (2) is provided with a feeding mechanism, which includes a frame (21). A lifting arm (22) is hinged on the frame (21). One end of the lifting arm (22) away from the frame (21) is hinged to the unloading frame (3). A fifth cylinder (23) is provided on the working frame (2). A fifth push rod is provided on the fifth cylinder (23). The fifth push rod is hinged to the frame (21).

9. A method for machining bevel gears according to claim 8, characterized in that: A drive motor (24) is provided on the frame (21). The output end of the drive motor (24) is connected to a rotating shaft (25). The rotating shaft (25) is rotatably connected inside the frame (21). A drive pulley (26) and a driven pulley (27) are rotatably connected on both sides of the frame (21). A conveyor belt (28) is connected between the drive pulley (26) and the driven pulley (27). The drive pulley (26) is fixedly connected to both ends of the rotating shaft (25).

10. A method for machining bevel gears according to claim 7, characterized in that: A guide mechanism is provided between the feeding frame (1) and the feeding track. The guide mechanism includes a support platform. An active guide wheel (29) and a rotary motor (30) for driving the active guide wheel (29) to rotate are rotatably connected on the support platform. Several first guide wheels (31) are provided on one side of the active guide wheel (29), and several second guide wheels (32) are provided on the other side. The first guide wheels (31), the active guide wheel (29) and the second guide wheels (32) are connected together by connecting gears.

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