Transmission shaft machining process

Abstract

The invention provides a transmission shaft machining process which comprises the following operation steps: S1, pouring a melt into a mold, cooling and molding, and then taking out to obtain a cylindrical solid rod, and S2, heating the cylindrical solid rod to 550-650 DEG C by using a box-type resistance furnace, and keeping the temperature for a period of time. According to the transmission shaft machining technology, a cylindrical solid rod is heated through a box type resistance furnace before quenching and then is slowly cooled along with the furnace, and the cylindrical solid rod is annealed, so that residual stress generated in the cooling forming process can be effectively eliminated, the risk of cracks caused by stress superposition in the subsequent quenching process is reduced, and the service life of the transmission shaft is prolonged. And meanwhile, the cylindrical solid rod is heated to be 30-50 DEG C higher than the critical temperature, heat preservation is conducted for proper time, then cooling is conducted in air, and normalizing is conducted on the cylindrical solid rod, so that the structure uniformity of the cylindrical solid rod is improved, a good structure foundation is provided for follow-up quenching, and the quenched structure and performance are more uniform and stable.

Description

Technical Field

[0001] The present invention relates to the field of transmission shaft processing, and in particular to a transmission shaft processing technology. Background Art

[0002] The drive shaft is an important component for transmitting power in the automobile transmission system. The drive shaft works together with the transmission and differential to transmit the torque output by the engine to the wheels, driving the vehicle.

[0003] The patent application with announcement number CN112775632A proposed in the prior art can effectively improve the production efficiency of the drive shaft by adopting the method of first mold forming and then direct milling processing. At the same time, the cylindrical solid rod is quenched before milling processing, thereby improving the overall yield strength and torsional strength of the drive shaft. Finally, protective paint is sprayed on the surface of the drive shaft, which can effectively improve the overall rust resistance and wear resistance of the drive shaft, further improve the market competitiveness of the drive shaft, which is in line with the interests of the enterprise itself.

[0004] However, after the mold is formed, residual stress will be generated inside the cylindrical solid rod, which will cause the residual stress and the stress generated by quenching to be superimposed on each other during quenching, causing the stress to exceed the bearing limit of the material, resulting in cracks in the drive shaft, reducing the strength and toughness of the drive shaft and affecting its service life.

[0005] Therefore, it is necessary to provide a transmission shaft processing technology to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a transmission shaft processing technology, which solves the problem that the current cylindrical solid rod is directly quenched after forming, and the residual stress and the stress generated by quenching are superimposed on each other, causing cracks in the transmission shaft.

[0007] In order to solve the above technical problems, the present invention provides a transmission shaft processing process, including the following steps:

[0008] S1, pouring the molten liquid into a mold, cooling and forming it, and taking it out to obtain a cylindrical solid rod;

[0009] S2. Heat the cylindrical solid rod to 550-650℃ using a box-type resistance furnace, keep it at this temperature for a while, and then slowly cool it down in the furnace;

[0010] S3. Heat the solid rod to 30-50℃ above the critical temperature by using a box-type resistance furnace, keep it warm for a suitable time, then cool it in air, and treat the surface by sandblasting, shot blasting, etc.

[0011] S4, placing the cylindrical solid rod into a quenching furnace for quenching treatment, and the quenching temperature is 800-900°C;

[0012] S5. Place the quenched cylindrical solid rod on a universal milling machine and use a special forming milling cutter to directly machine out the transmission shaft;

[0013] S6. Use a grinding mechanism to perform fine grinding on the transmission shaft, use a spraying mechanism to spray protective paint on the surface of the transmission shaft, and place the transmission shaft in a drying mechanism for drying;

[0014] S7. After passing the inspection, the products are packed and put into storage.

[0015] Preferably, the box-type resistance furnace includes a switching device, which includes a baffle, two connecting rods, two first telescopic parts and a guide device. The baffle is arranged on one side of the box-type resistance furnace, one end of the two connecting rods is fixedly connected to the two ends of the top of the baffle, the two first telescopic parts are respectively arranged at one end of the two connecting rods, and the guide device is arranged on one side of the box-type resistance furnace.

[0016] Preferably, the guide device includes two guide rods and two guide blocks, the two guide rods are fixedly installed on one side of the box-type resistance furnace, and the two guide blocks are slidably connected to the surfaces of the two guide rods respectively.

[0017] Preferably, a base is provided at the bottom of the box-type resistance furnace, and a unloading device is provided inside the base. The unloading device includes a threaded rod, a movable frame, a servo motor, a plurality of second telescopic parts and a unloading frame. The threaded rod is rotatably connected to the inside of the base, and the movable frame is threadedly connected to the surface of the threaded rod. The servo motor is fixedly installed on one side of the base, and a plurality of second telescopic parts are fixedly installed on the top of the movable frame. The unloading frame is arranged at one end of the plurality of second telescopic parts. A support frame is fixedly installed inside the box-type resistance furnace, and the top of the support frame is arranged on the storage box.

[0018] Preferably, a limiting assembly is provided inside the unloading rack, and the limiting assembly includes a rotating rod, a torsion spring and a limiting block. The rotating rod is rotatably connected to the inside of the unloading rack, the torsion spring is sleeved on the surface of the rotating rod, and the bottom of the limiting block is fixedly connected to the top of the rotating rod.

[0019] Preferably, a fixing device is provided inside the storage box, and the fixing device includes two fixing grooves and two fixing racks. The two fixing grooves are both opened inside the storage box, and the two fixing racks are respectively slidably connected to the inside of the two fixing grooves.

[0020] Preferably, a positioning assembly is provided inside the storage box, and the positioning assembly includes a plurality of positioning slots and a plurality of positioning blocks. The plurality of positioning slots are all opened inside the storage box, and the plurality of positioning blocks are respectively slidably connected to the interiors of the plurality of positioning slots.

[0021] Preferably, a collection box is provided on one side of the unloading rack.

[0022] Preferably, a plurality of material guide blocks are fixedly connected to the interior of the storage box, and a plurality of material discharge chutes are opened inside the storage box.

[0023] Preferably, a discharge device is provided inside the storage box, and the discharge device includes multiple reset grooves, multiple reset blocks, multiple reset springs, a sealing plate and multiple movable plates. The multiple reset grooves are all opened inside the storage box, and the multiple reset blocks are respectively slidably connected to the inside of the multiple reset grooves. The multiple reset springs are respectively located at one end of the multiple reset blocks and are respectively located inside the multiple reset grooves. The top of the sealing plate is fixedly connected to the bottom of the reset block, and the top of the movable plate is fixedly connected to the bottom of the sealing plate.

[0024] Compared with the related art, the transmission shaft processing technology provided by the present invention has the following beneficial effects:

[0025] The present invention provides a transmission shaft processing process, which heats a cylindrical solid rod in a box-type resistance furnace before quenching, and then slowly cools the rod along with the furnace to anneal the cylindrical solid rod, thereby effectively eliminating residual stress generated in the cooling and forming process, and reducing the risk of cracks caused by stress superposition during subsequent quenching. At the same time, the cylindrical solid rod is heated to -°C above a critical temperature, kept warm for an appropriate time, and then cooled in air to be normalized, thereby improving the structural uniformity of the cylindrical solid rod, providing a good structural foundation for subsequent quenching, and making the structure and performance after quenching more uniform and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a first embodiment of a transmission shaft processing process provided by the present invention;

[0027] Figure 2 for Figure 1 A schematic cross-sectional structural diagram of a box-type resistance furnace is shown;

[0028] Figure 3 for Figure 1 An enlarged schematic diagram of part A is shown;

[0029] Figure 4 A schematic structural diagram of a second embodiment of a transmission shaft processing process provided by the present invention;

[0030] Figure 5 for Figure 4 The structural diagram of the storage box shown;

[0031] Figure 6 for Figure 4 An enlarged schematic diagram of part B is shown;

[0032] Figure 7 A schematic structural diagram of a third embodiment of a transmission shaft processing process provided by the present invention;

[0033] Figure 8 for Figure 7 An enlarged schematic diagram of part C is shown.

[0034] Numbers in the figure: 1, box-type resistance furnace, 2, switch device, 21, baffle, 22, connecting rod, 23, first telescopic member, 24, guide device, 241, guide rod, 242, guide block,

[0035] 3. Base, 4. Unloading device, 41. Threaded rod, 42. Moving frame, 43. Servo motor, 44. Second telescopic member, 45. Unloading frame,

[0036] 5. Support frame, 6. Storage box,

[0037] 7. Limiting device, 71. Rotating rod, 72. Torsion spring, 73. Limiting block,

[0038] 8. Fixing device, 81. Fixing slot, 82. Fixing frame,

[0039] 9. Positioning assembly, 91. Positioning slot, 92. Positioning block,

[0040] 10. Collecting box, 11. Material guide block, 12. Material discharge chute, 13. Material discharge device, 131. Reset chute, 132. Reset block, 133. Reset spring, 134. Sealing plate, 135. Moving plate. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] First embodiment

[0043] Please refer to Figure 1 、 Figure 2 and Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a transmission shaft processing process provided by the present invention; Figure 2 for Figure 1 A schematic cross-sectional structural diagram of the heating device shown; Figure 3 for Figure 1A transmission shaft processing process includes the following steps:

[0044] S1, pouring the molten liquid into a mold, cooling and forming it, and taking it out to obtain a cylindrical solid rod;

[0045] S2. Heat the cylindrical solid rod to 550-650°C using a box-type resistance furnace 1, keep the temperature for a period of time, and then slowly cool it down with the furnace;

[0046] S3, heating the solid rod to 30-50°C above the critical temperature by using a box-type resistance furnace 1, keeping the temperature for a suitable time, and then cooling it in air, and treating the surface by sandblasting, shot blasting, etc.;

[0047] S4, placing the cylindrical solid rod into a quenching furnace for quenching treatment, and the quenching temperature is 800-900°C;

[0048] S5. Place the quenched cylindrical solid rod on a universal milling machine and use a special forming milling cutter to directly machine out the transmission shaft;

[0049] S6. Use a grinding mechanism to perform fine grinding on the transmission shaft, use a spraying mechanism to spray protective paint on the surface of the transmission shaft, and place the transmission shaft in a drying mechanism for drying;

[0050] S7. After passing the inspection, the products are packed and put into storage.

[0051] The box-type resistance furnace 1 includes a switch device 2, which includes a baffle 21, two connecting rods 22, two first telescopic parts 23 and a guide device 24. The baffle 21 is arranged on one side of the box-type resistance furnace 1, one end of the two connecting rods 22 is fixedly connected to the two ends of the top of the baffle 21, the two first telescopic parts 23 are respectively arranged at one end of the two connecting rods 22, and the guide device 24 is arranged on one side of the box-type resistance furnace 1.

[0052] The first telescopic member 23 is a cylinder, a hydraulic rod, and an electric push rod. One side of the two first telescopic members 23 is fixedly connected to the two sides of the box-type resistance furnace 1 respectively, and is used to push the baffle 21 to move.

[0053] The guide device 24 includes two guide rods 241 and two guide blocks 242 . The two guide rods 241 are fixedly installed on one side of the box-type resistance furnace 1 , and the two guide blocks 242 are slidably connected to the surfaces of the two guide rods 241 .

[0054] One side of the two guide blocks 242 is fixedly connected to one end of both sides of the baffle 21, and is used to drive the two guide blocks 242 to move on the surfaces of the two guide rods 241 when the baffle 21 moves, thereby increasing the stability of the baffle 21 when moving.

[0055] A base 3 is provided at the bottom of the box-type resistance furnace 1, and a discharge device 4 is provided inside the base 3. The discharge device 4 includes a threaded rod 41, a movable frame 42, a servo motor 43, multiple second telescopic parts 44 and a discharge rack 45. The threaded rod 41 is rotatably connected to the inside of the base 3, the movable frame 42 is threadedly connected to the surface of the threaded rod 41, the servo motor 43 is fixedly installed on one side of the base 3, and multiple second telescopic parts 44 are all fixedly installed on the top of the movable frame 42. The discharge rack 45 is arranged at one end of multiple second telescopic parts 44. A support frame 5 is fixedly installed inside the box-type resistance furnace 1, and the top of the support frame 5 is arranged on the storage box 6.

[0056] The second telescopic member 44 is a cylinder, a hydraulic rod, and an electric push rod. The two ends of the plurality of second telescopic members 44 are fixedly mounted on the four corners of the top of the moving frame 42 and the four corners of the bottom of the unloading frame 45, thereby pushing the unloading frame 45 to move upward or downward after starting.

[0057] The output end of the servo motor 43 is connected to one end of the threaded rod 41 through a coupling, so as to drive the threaded rod 41 to rotate after starting.

[0058] A rectangular groove is provided inside the base 3, and a rectangular block that is adapted to the rectangular groove is fixedly connected to the bottom of the movable frame 42. A threaded hole that is adapted to the threaded rod 41 is provided inside the rectangular block, which is used to drive the rectangular block to move to one side inside the rectangular groove when the threaded rod 41 rotates to one side, thereby driving the movable frame 42 to move to one side.

[0059] A limiting assembly 7 is provided inside the unloading rack 45, and the limiting assembly 7 includes a rotating rod 71, a torsion spring 72 and a limiting block 73. The rotating rod 71 is rotatably connected to the inside of the unloading rack 45, the torsion spring 72 is sleeved on the surface of the rotating rod 71, and the bottom of the limiting block 73 is fixedly connected to the top of the rotating rod 71.

[0060] When the unloading rack 45 moves downward, after the surface of the limit block 73 contacts the surface of the support frame 5, the limit block 73 drives the rotating rod 71 to rotate to one side, and the torsion spring 72 is tightened. After the unloading rack 45 moves to the appropriate position, the torsion spring 72 is reset, driving the limit block 73 to rotate and reset to one side.

[0061] One end of the limit block 73 is fixedly connected to the top of the rotating rod 71 through two rectangular blocks, and the two ends of the torsion spring 72 are respectively fixedly connected to the limit block 73 and the inside of the unloading rack 45.

[0062] When the box-type resistance furnace 1 needs to be opened, the first telescopic member 23 is activated to drive the connecting rod 22 connected to the baffle 21 to move upward, while the guide device 24 is moved upward until the baffle 21 moves upward to a suitable position.

[0063] When loading, the servo motor 43 is started to drive the threaded rod 41 to rotate to one side, thereby driving the movable frame 42 connected to multiple second telescopic parts 44 to move to one side, so that the unloading frame 45 enters the appropriate position inside the box-type resistance furnace 1, and then the multiple second telescopic parts 44 are started to contract to drive the unloading frame 45 to move downward, so that the workpiece rack is placed on the top of the support frame 5, and then the servo motor 43 is started to drive the threaded rod 41 to reverse, so that the movable frame 42 drives the unloading frame 45 to reset.

[0064] When closing is required, the first telescopic member 23 is activated to contract, thereby driving the connecting rod 22 connected to the baffle 21 to move downward and reset.

[0065] The working principle of a transmission shaft processing technology provided by the present invention is as follows:

[0066] When in use, the melt is poured into a mold, cooled and formed, and then taken out to obtain a cylindrical solid rod;

[0067] The cylindrical solid rod is heated to 550-650°C using a box-type resistance furnace 1, kept at this temperature for a period of time, and then slowly cooled in the furnace;

[0068] The solid rod is heated to 30-50°C above the critical temperature by using a box-type resistance furnace 1, kept warm for a suitable time, and then cooled in air, and the surface is treated by sandblasting, shot blasting, etc.;

[0069] The cylindrical solid rod is placed in a quenching furnace for quenching treatment, and the quenching temperature is 800-900°C;

[0070] The quenched cylindrical solid rod is placed on a universal milling machine and a special forming milling cutter is used to directly machine the transmission shaft;

[0071] Use a grinding mechanism to fine-grind the transmission shaft, use a spraying mechanism to spray protective paint on the surface of the transmission shaft, and place the transmission shaft in a drying mechanism for drying;

[0072] After passing the inspection, the products are packaged and put into storage.

[0073] Compared with the related art, the transmission shaft processing technology provided by the present invention has the following beneficial effects:

[0074] The present invention provides a transmission shaft processing process, which heats a cylindrical solid rod using a box-type resistance furnace 1 before quenching, and then slowly cools the rod along with the furnace to anneal the cylindrical solid rod, thereby effectively eliminating residual stress generated during the cooling and forming process, and reducing the risk of cracks caused by stress superposition during subsequent quenching. At the same time, the cylindrical solid rod is heated to 30-50°C above the critical temperature, kept warm for an appropriate time, and then cooled in air to be normalized, thereby improving the structural uniformity of the cylindrical solid rod, providing a good structural foundation for subsequent quenching, and making the structure and performance after quenching more uniform and stable.

[0075] Second embodiment

[0076] Please refer to Figure 4 、 Figure 5 and Figure 6 Based on the transmission shaft processing technology provided by the first embodiment of the present application, the second embodiment of the present application proposes another transmission shaft processing technology. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0077] Specifically, the difference of the transmission shaft processing process provided in the second embodiment of the present application is that, in a transmission shaft processing process, a fixing device 8 is provided inside the storage box 6, and the fixing device 8 includes two fixing grooves 81 and two fixing frames 82, and the two fixing grooves 81 are both opened inside the storage box 6, and the two fixing frames 82 are respectively slidably connected to the inside of the two fixing grooves 81.

[0078] One end of the fixing frame 82 is fixedly connected to one side of the unloading frame 45 , and is used to drive the fixing frame 82 to move to one side when the unloading frame 45 moves to one side.

[0079] A positioning assembly 9 is provided inside the storage box 6 , and the positioning assembly 9 includes a plurality of positioning grooves 91 and a plurality of positioning blocks 92 . The plurality of positioning grooves 91 are all opened inside the storage box 6 , and the plurality of positioning blocks 92 are respectively slidably connected to the interior of the plurality of positioning grooves 91 .

[0080] The bottoms of the plurality of positioning blocks 92 are fixedly connected to the surface of the support frame 5 , and are used to limit the storage box 6 after the plurality of positioning grooves 91 inside the storage box 6 are respectively sleeved on the surfaces of the plurality of positioning blocks 92 .

[0081] The working principle of a transmission shaft processing technology provided by the present invention is as follows:

[0082] During use, when the unloading rack 45 moves to one side, it drives the fixing rack 82 to move to one side and inserts into the fixing groove 81. When the unloading rack 45 moves upward, it drives the fixing rack 82 to move upward to a suitable position inside the fixing groove 81. Then, it drives the storage box 6 to move upward, so that the multiple positioning grooves 91 are moved and separated on the surfaces of the multiple positioning blocks 92 respectively. When the unloading rack 45 moves to one side and resets, it drives the storage box 6 to move to the outside of the box-type resistance furnace 1.

[0083] When the unloading rack 45 is loading, it drives the fixed rack 82 to move to one side, so that the storage box 6 is moved to a suitable position inside the box-type resistance furnace 1. When the unloading rack 45 moves downward, it first drives the storage box 6 to move downward, so that the multiple positioning grooves 91 are respectively inserted into the surfaces of the multiple positioning blocks 92. After the fixed rack 82 moves downward to a suitable position inside the fixed groove 81, when the unloading rack 45 moves and resets, it drives the fixed rack 82 to move to one side inside the fixed groove 81 and separate.

[0084] Compared with the related art, the transmission shaft processing technology provided by the present invention has the following beneficial effects:

[0085] The present invention provides a transmission shaft processing technology, wherein a fixing device 8 cooperates with a positioning assembly 9, and the storage box 6 is taken out at the same time as the workpiece inside the heating device is taken out, thereby facilitating the removal of the storage box 6 for cleaning.

[0086] Third embodiment

[0087] Please refer to Figure 7 and Figure 8 Based on the transmission shaft processing technology provided by the first embodiment of the present application, the second embodiment of the present application proposes another transmission shaft processing technology. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0088] Specifically, the third embodiment of the present application provides a transmission shaft processing technology that is different in that, in a transmission shaft processing technology, a collection box 10 is provided on one side of the blanking rack 45 .

[0089] A plurality of material guide blocks 11 are fixedly connected to the interior of the storage box 6 , and a plurality of material discharge chutes 12 are opened inside the storage box 6 .

[0090] A discharge device 13 is provided inside the storage box 6, and the discharge device 13 includes multiple reset grooves 131, multiple reset blocks 132, multiple reset springs 133, a sealing plate 134 and multiple movable plates 135. The multiple reset grooves 131 are all opened inside the storage box 6, and the multiple reset blocks 132 are respectively slidably connected to the inside of the multiple reset grooves 131. The multiple reset springs 133 are respectively located at one end of the multiple reset blocks 132 and are respectively located inside the multiple reset grooves 131. The top of the sealing plate 134 is fixedly connected to the bottom of the reset block 132, and the top of the movable plate 135 is fixedly connected to the bottom of the sealing plate 134.

[0091] The bottoms of the multiple reset blocks 132 are respectively fixedly connected to the top of the sealing plate 134 to cooperate with the multiple reset springs 133 so that the sealing plate 134 is automatically reset after the collection box 10 is separated from the movable plate 135.

[0092] The sealing plate 134 is provided with a plurality of feed troughs 12

[0093] The working principle of a transmission shaft processing technology provided by the present invention is as follows:

[0094] During use, when the discharge rack 45 moves to one side, it drives the collecting box 10 to move to one side until one end contacts the surface of the movable plate 135, and then pushes the movable plate 135 connected to the sealing plate 134 to move to one side, thereby driving the multiple reset blocks 132 to move to one side inside the multiple reset grooves 131 respectively, while squeezing the multiple reset springs 133 respectively. When the sealing plate 134 moves to one side, it drives the multiple discharge troughs 12 to move to one side until they overlap with the multiple discharge troughs 12 inside the storage box 6. The oxide residue inside the storage box 6 will be discharged into the interior of the collecting box 10 through the multiple discharge troughs 12.

[0095] When the unloading rack 45 drives the collection box 10 to move to one side and reset, the multiple reset springs 133 push the multiple reset blocks 132 to move to one side and reset inside the multiple reset grooves 131, thereby driving the sealing plate 134 to move to one side and reset, so that the multiple unloading grooves 12 inside the sealing plate 134 can be separated from the multiple unloading grooves 12 inside the storage box 6.

[0096] Compared with the related art, the transmission shaft processing technology provided by the present invention has the following beneficial effects:

[0097] The present invention provides a transmission shaft processing technology, which automatically discharges oxide residues inside the storage box 6 through the collection box 10, the guide block 11, the discharge chute 12 and the discharge device 13, thereby facilitating the cleaning of the interior of the storage box 6.

[0098] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A transmission shaft processing process, characterized in that: include: The following steps S1, pouring the molten liquid into a mold, cooling and forming it, and taking it out to obtain a cylindrical solid rod; S2. Heat the cylindrical solid rod to 550-650℃ using a box-type resistance furnace, keep it at this temperature for a while, and then slowly cool it down in the furnace; S3. Heat the solid rod to 30-50℃ above the critical temperature by using a box-type resistance furnace, keep it warm for a suitable time, then cool it in air, and treat the surface by sandblasting, shot blasting, etc. S4, placing the cylindrical solid rod into a quenching furnace for quenching treatment, and the quenching temperature is 800-900°C; S5. Place the quenched cylindrical solid rod on a universal milling machine and use a special forming milling cutter to directly machine out the transmission shaft; S6. Use a grinding mechanism to perform fine grinding on the transmission shaft, use a spraying mechanism to spray protective paint on the surface of the transmission shaft, and place the transmission shaft in a drying mechanism for drying; S7. After passing the inspection, the products are packed and put into storage.

2. A transmission shaft processing process according to claim 1, characterized in that: The box-type resistance furnace includes a switching device, which includes a baffle, two connecting rods, two first telescopic parts and a guide device. The baffle is arranged on one side of the box-type resistance furnace, one end of the two connecting rods is fixedly connected to the two ends of the top of the baffle, the two first telescopic parts are respectively arranged at one end of the two connecting rods, and the guide device is arranged on one side of the box-type resistance furnace.

3. A transmission shaft processing process according to claim 2, characterized in that: The guide device includes two guide rods and two guide blocks. The two guide rods are fixedly installed on one side of the box-type resistance furnace, and the two guide blocks are respectively slidably connected to the surfaces of the two guide rods.

4. A transmission shaft processing process according to claim 3, characterized in that: A base is provided at the bottom of the box-type resistance furnace, and a unloading device is provided inside the base. The unloading device includes a threaded rod, a movable frame, a servo motor, a plurality of second telescopic parts and a unloading frame. The threaded rod is rotatably connected to the inside of the base, and the movable frame is threadedly connected to the surface of the threaded rod. The servo motor is fixedly installed on one side of the base, and a plurality of second telescopic parts are fixedly installed on the top of the movable frame. The unloading frame is arranged at one end of the plurality of second telescopic parts. A support frame is fixedly installed inside the box-type resistance furnace, and the top of the support frame is arranged on the storage box.

5. A transmission shaft processing process according to claim 4, characterized in that: A limiting assembly is provided inside the unloading rack, and the limiting assembly includes a rotating rod, a torsion spring and a limiting block. The rotating rod is rotatably connected to the inside of the unloading rack, the torsion spring is sleeved on the surface of the rotating rod, and the bottom of the limiting block is fixedly connected to the top of the rotating rod.

6. A transmission shaft processing process according to claim 4, characterized in that: A fixing device is provided inside the storage box. The fixing device includes two fixing grooves and two fixing racks. The two fixing grooves are both opened inside the storage box. The two fixing racks are respectively slidably connected to the inside of the two fixing grooves.

7. A transmission shaft processing process according to claim 6, characterized in that: A positioning assembly is provided inside the storage box. The positioning assembly includes a plurality of positioning slots and a plurality of positioning blocks. The plurality of positioning slots are all opened inside the storage box, and the plurality of positioning blocks are respectively slidably connected to the interiors of the plurality of positioning slots.

8. A transmission shaft processing process according to claim 4, characterized in that: A collecting box is provided on one side of the unloading rack.

9. A transmission shaft processing process according to claim 7, characterized in that: A plurality of material guide blocks are fixedly connected to the interior of the storage box, and a plurality of material discharge troughs are opened inside the storage box.

10. A transmission shaft processing process according to claim 9, characterized in that: A discharge device is provided inside the storage box, and the discharge device includes multiple reset grooves, multiple reset blocks, multiple reset springs, a sealing plate and multiple movable plates. The multiple reset grooves are all opened inside the storage box, and the multiple reset blocks are respectively slidably connected to the interiors of the multiple reset grooves. The multiple reset springs are respectively located at one end of the multiple reset blocks and are respectively located inside the multiple reset grooves. The top of the sealing plate is fixedly connected to the bottom of the reset block, and the top of the movable plate is fixedly connected to the bottom of the sealing plate.

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