A spline hub processing technology

Abstract

The present invention relates to a spline hub processing technology, belonging to the technical field of mechanical processing of parts, and comprising the following steps: automatic feeding in the first process; ultrasonic cleaning in the second process; water washing in the third process; hot water sealing in the fourth process; air drying in the fifth process; sandblasting and blowing clean in the sixth process; ultrasonic cleaning in the seventh process; hot water sealing in the eighth process; air drying in the ninth process; primer coating in the tenth process; primer cleaning in the eleventh process; drying in the twelfth process; workpiece heating in the thirteenth process; vulcanization in the fourteenth process; cooling in the fifteenth process; broaching and shaping in the sixteenth process; turning in the seventeenth process. Each process of the present invention is reasonably arranged, the production line balance rate is high, the degree of automation processing is higher, no manual participation is required, and the processing and manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to a spline hub processing technology, belonging to the technical field of parts machining. Background Art

[0002] The drive shaft assembly is a key component of an automobile, and the spline hub is a key part of the drive shaft assembly. Generally, the spline hub of an automobile drive shaft assembly is shaped like a cylinder with a bottom surface, and teeth are provided on the cylindrical surface. A layer of nylon is coated on the surface of the spline hub, which can reduce the spline fit clearance and has the function of reducing vibration and noise at the same time. The traditional processing process flow is cleaning - sandblasting - dipping primer - heating - nylon coating - cooling - machining. Each process is manually operated and is an independent processing unit, occupying a large area, having low processing production efficiency, requiring a large number of personnel, and resulting in too high a unit price of the spline hub.

[0003] Therefore, a fully automatic processing technology for the spline hub used in the drive shaft has been invented. From loading, cleaning, drying, sandblasting, etc., to the final spline broaching and finish machining of the end face and outer circle, the whole line can operate without manual intervention, with a higher degree of automation. Through the transfer of workpieces on the automatic line, cleaning, sandblasting, nylon coating, cooling, and machining are carried out collaboratively, eliminating manual loading and unloading and reducing the time for handling between processes.

[0004] The present invention for a patent realizes the full automation of the processing of the core component, the spline hub, of the drive shaft assembly, reduces the labor intensity of workers, improves production efficiency, reduces processing and manufacturing costs, and improves the consistency and stability of products, which is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a spline hub processing technology with a higher degree of automation and processing efficiency in view of the above problems, and reduce processing and manufacturing costs.

[0006] The present invention is realized through the following technical solutions:

[0007] That is, a spline hub processing technology includes the following process steps:

[0008] S1: The AGV cart transports the tray with the workpiece to the specified position. After the tray arrives, the system sends an instruction to start running to the robot. The robot identifies the position and features of the workpiece through the vision system, guides the robot to pick up the workpiece, and at the same time realizes the function of error prevention;

[0009] S2: The robot grabs the workpiece from the tray and places it on the cleaning loading platform, and then the robot continuously and circularly loads the workpiece;

[0010] S3: The truss manipulator grabs the workpiece, and through the control of the servo motor, the workpiece can be automatically immersed in the cleaning tank, and at the same time, it can automatically identify whether there is a workpiece. If there is no workpiece, the line will stop and an alarm will be issued;

[0011] S4: After the workpiece is dried, sandblasting and blowing are carried out. The workstations achieve automatic loading and unloading through robots. The large turntable of the sandblasting machine is equipped with 4 workstations, namely the loading and unloading workstation, the to-be-sprayed workstation, the sandblasting workstation, and the blowing workstation.

[0012] S5: Clean the workpiece according to the operation steps in step S3.

[0013] S6: After the workpiece is dried, apply primer to the workpiece. The truss manipulator grabs the workpiece and immerses it in the primer tank to apply primer, pauses for a few seconds after lifting, and quickly moves to the next process.

[0014] S7: Heating. The heating furnace adopts a through-type chain plate drive structure, which is divided into three zones, namely the preheating zone, the temperature-rising zone, and the heat-preserving zone. There are workpieces placed on the chain plate fixed with fixtures. It enters from one end and exits from the other end. The temperature of the workpiece is detected at the exit. If the temperature of the workpiece does not meet the process requirements, it has an alarm function. The loading is realized through the truss manipulator, and the unloading is completed through the robot.

[0015] S8: Vulcanization. The robot immerses the heated workpiece into the vulcanization tank, and controls the workpiece to move up and down to complete surface vulcanization. A layer of nylon is vulcanized on the surface of the workpiece. Under program control, the vulcanization time and the number of vulcanization times can be controlled by programming. After vulcanization to the process requirement size, the workpiece is transported to the next process by the robot.

[0016] S9: Cooling. The robot places the workpiece in the cooling turnover area and cools it with a fan. After the temperature of the workpiece drops below 160 °C, it is grabbed onto the step-chain cooling conveyor. The temperature can be automatically detected at both the entrance and the exit of the strong cooling chamber to ensure that it starts to enter the step-chain cooling conveyor for air cooling when the temperature is below 160 °C, and ensure that the offline temperature is not higher than 90 °C. If it exceeds the process requirements, an alarm prompt will be given. The unloading is grabbed by the robot and placed on the workbench, and is transported to the waiting processing area or the next process by the AGV trolley.

[0017] S10: Broaching and shaping. The cooled workpiece is transported to the designated loading position by the AGV trolley, grabbed by the robot and placed on the positioning fixture of the broaching machine. The small end of the workpiece faces up, the robot moves out, the equipment automatically closes the safety door, automatically locates and clamps the internal spline of the spline hub, realizes automatic broaching of the internal spline. After broaching to the process requirement size, the fixture is loosened, the safety door is automatically opened, and it is automatically grabbed by the robot and placed on the workbench.

[0018] S11: Turning. The workpiece after turning and broaching is transported by an AGV cart to the designated loading position, grasped by a robot and placed on the positioning fixture of the lathe. Meanwhile, the positioning mandrel positions and clamps the minor diameter of the internal spline. The robot moves out, the equipment automatically closes the safety door, and automatic turning of the large end face and outer circle of the spline hub is realized. After turning to the process requirement size, the safety door automatically opens. After the robot automatically grasps the workpiece, the fixture automatically loosens, and the robot places the workpiece on the work position fixture. It is transported by an AGV cart to the finished product storage area.

[0019] Each process of the present invention is reasonably arranged, the production line balance rate is high, the degree of automation processing is higher, no manual participation is required, the processing efficiency is higher, and the processing and manufacturing cost is reduced.

[0020] A further improvement of the present invention is that the method of cleaning the workpiece in step S2 is ultrasonic cleaning, which includes two work positions, and four workpieces are cleaned simultaneously at each work position. The small end of the workpiece is at the bottom, and the gantry robot can simultaneously grasp four workpieces on the loading platform and place them at this work position. The oil stain on the surface of the workpiece is cleaned by ultrasonic method, and the cleaning effect is better and the efficiency is higher.

[0021] A further improvement of the present invention is that step S3 includes two work positions, and four workpieces are cleaned simultaneously at each work position. The automatic operation of the workpiece between processes and the two work positions is realized by the gantry robot. Each work position can realize the automatic immersion of the workpiece into the cleaning tank through the control of a servo motor, and the cleaning tank is filled with water. After cleaning the workpiece, soak and wash the workpiece to clean the cleaning liquid remaining on the surface of the workpiece.

[0022] A further improvement of the present invention is that there is also the following process step between step S3 and S4: air drying. One work position can process four workpieces simultaneously. The gantry robot simultaneously grasps four workpieces and blows water with an air knife with an inner and outer ring structure from top to bottom to dry the surface of the workpiece. The automatic operation of the workpiece between processes is also realized by the gantry robot. After the workpiece is soaked and washed with water, the air knife with an inner and outer ring structure is used to dry the workpiece, which greatly improves the drying efficiency of the workpiece.

[0023] A further improvement of the present invention is that before drying the workpiece, the workpiece is immersed in a hot water tank, and whether there is a workpiece is automatically identified. If there is no workpiece, the production line will stop and alarm. The automatic operation of the workpiece between processes is realized by the gantry robot. The workpiece is immersed in the hot water tank, on the one hand, to further clean the workpiece, and on the other hand, to increase the temperature of the workpiece, which is beneficial to improving the drying speed of the workpiece.

[0024] A further improvement of the present invention is that in step S6, the workpiece is dried by natural air drying.

[0025] A further improvement of the present invention is that there are also the following process steps between steps S5 and S6: Four workpieces can be processed simultaneously at one station, and automatic lifting can be achieved through servo motor control. The workpieces are immersed in a hot water tank, and at the same time, it can automatically identify whether there are workpieces. If there are no workpieces, the production line will stop and an alarm will be issued. The automatic transfer of workpieces between processes is realized through a gantry robot.

[0026] A further improvement of the present invention is that in step S6, the gantry robot simultaneously grabs four workpieces and immerses them in the primer tank to apply primer.

[0027] A further improvement of the present invention is that in step S7, four workpieces are placed in a row on the fixture, and there are a total of 23 rows in the furnace, which can hold 92 workpieces. The heating step has higher efficiency and is beneficial to improving the processing efficiency.

[0028] A further improvement of the present invention is that in step S8, the robot simultaneously grabs four heated workpieces and immerses them in the vulcanization tank.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The processes of the present invention are reasonably arranged, the production line balance rate is high, the degree of automation processing is higher, no manual participation is required, the processing efficiency is higher, and the processing and manufacturing costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the spline hub processing area of the specific embodiment of the present invention. SPECIFIC EMBODIMENTS

[0033] The specific embodiments of the present invention will be further described in detail below with reference to the drawings.

[0034] Embodiment 1:

[0035] As Figure 1 shown, a spline hub processing process includes the following process steps:

[0036] S1: The AGV cart transports the tray with workpieces to the specified position. After the tray arrives, the system issues an instruction to start running to the robot. The robot identifies the position and features of the workpieces through the vision system, guides the robot to pick up the workpieces, and at the same time realizes the function of error prevention;

[0037] S2: The robot grabs the workpiece from the tray and places it on the cleaning loading platform, and then the robot continuously feeds in a cycle.

[0038] S3: The gantry manipulator grabs the workpiece, and the servo motor control enables the workpiece to be automatically immersed in the cleaning tank. At the same time, it automatically identifies whether there is a workpiece. If there is no workpiece, the production line will stop and an alarm will be given.

[0039] S4: After the workpiece is dried, sandblasting and blowing are carried out. The workpieces are automatically loaded and unloaded by the robot at the station. There are 4 stations in total on the large turntable of the sandblasting machine, namely the loading and unloading station, the station to be sandblasted, the sandblasting station, and the blowing station.

[0040] S5: Clean the workpiece according to the operation steps in step S3.

[0041] S6: After the workpiece is dried, apply primer to the workpiece. The gantry manipulator grabs the workpiece and immerses it in the primer tank to apply primer, pauses for a few seconds after lifting, and quickly moves to the next process.

[0042] S7: Heating. The heating furnace adopts a through-chain plate transmission structure, which is divided into three zones, namely the preheating zone, the temperature rising zone, and the heat preservation zone. There are workpieces fixtures fixed on the chain plate, with one end for feeding and the other end for discharging. The temperature of the workpiece is detected at the outlet. If the workpiece temperature does not meet the process requirements, it has an alarm function; loading is realized by the gantry manipulator, and unloading is completed by the robot.

[0043] S8: Vulcanization. The robot immerses the heated workpiece into the vulcanization tank, and controls the workpiece to move up and down to complete surface vulcanization. A layer of nylon is vulcanized on the workpiece surface. Under program control, the vulcanization time and the number of vulcanization times can be controlled by programming. After vulcanization to the process required size, the workpiece is transported to the next process by the robot.

[0044] S9: Cooling. The robot places the workpiece in the cooling turnover area, and cools it through the fan. After the workpiece temperature drops below 160°C, it is grabbed onto the step chain cooling conveyor. The temperature can be automatically detected at both the inlet and outlet of the strong cooling chamber to ensure that it starts to enter the step chain cooling conveyor for air cooling when the temperature is below 160°C, and ensure that the offline temperature is not higher than 90°C. If it exceeds the process requirements, an alarm will be given. The workpiece is grabbed by the robot and placed on the workbench fixture, and transported to the waiting processing area or the next process by the AGV cart.

[0045] S10: Broaching and shaping. The cooled workpiece is transported to the designated loading position by the AGV cart, grabbed by the robot and placed on the positioning fixture of the broaching machine. The small end of the workpiece faces up, and the robot moves out. The equipment automatically closes the safety door, automatically locates and clamps the internal spline of the spline hub to realize automatic broaching of the internal spline. After broaching to the process required size, the fixture is loosened, the safety door automatically opens, and it is automatically grabbed by the robot and placed on the workbench fixture.

[0046] S11: After turning and broaching, the workpiece is transported by an AGV cart to the designated loading position, grasped by a robot and placed on the positioning fixture of the lathe. At the same time, the positioning mandrel positions and clamps the small diameter of the internal spline. The robot moves out, and the equipment automatically closes the safety door to realize automatic turning of the large end face and outer circle of the spline hub. After turning to the process requirement size, the safety door automatically opens. After the robot automatically grasps the workpiece, the fixture automatically loosens, and the robot places the workpiece on the work position fixture; it is transported by an AGV cart to the finished product storage area.

[0047] Embodiment 2:

[0048] As Figure 1 shown, a spline hub processing process includes the following process steps:

[0049] S1: The pallet with the workpiece is transported to the designated position by an AGV cart. After the pallet arrives, the system sends an instruction to start running to the six-axis articulated robot. The robot identifies the workpiece position and features through the vision system, guides the robot to accurately pick up the material, and at the same time realizes the function of error prevention;

[0050] S2: The robot grabs the workpiece from the pallet and places it on the ultrasonic cleaning loading platform, and then the robot continuously circulates for loading;

[0051] S3: The truss manipulator grabs the workpiece, and through the control of the servo motor, the workpiece can be automatically immersed in the cleaning tank, and at the same time, it can automatically identify whether there is a workpiece. If there is no workpiece, the production line will stop and an alarm will be issued;

[0052] S4: Hot water sealing, through the control of the servo motor, the workpiece is automatically lifted and lowered, and the workpiece is sunk into the hot water tank for soaking. At the same time, it automatically identifies whether there is a workpiece. If there is no workpiece, the production line will stop and an alarm will be issued. The truss manipulator realizes the automatic transfer of the workpiece between processes;

[0053] S5: Dry the workpiece. Four workpieces can be processed at this station at the same time. The truss manipulator grabs four workpieces at the same time and blows water with air knives through the inner and outer ring structures from top to bottom to dry the surface of the workpiece;

[0054] S6: After the workpiece is dried, sandblasting and blowing are carried out. The automatic loading and unloading of the workpiece is realized at the station through a six-axis articulated robot. A total of 4 stations are set on the large turntable of the sandblasting machine, and the 4 stations are respectively the loading and unloading station, the station to be sprayed, the sandblasting station, and the blowing and cleaning station;

[0055] S7: Clean the workpiece according to the operation steps in step S3;

[0056] S8: Carry out hot water sealing on the workpiece according to the operation steps in step S4;

[0057] S9: After the workpiece is dried, spray primer on the workpiece. The truss manipulator grabs four workpieces at the same time and immerses them in the primer tank to apply primer, pauses for a few seconds after lifting, and quickly moves to the next process;

[0058] S10: Heating. The heating furnace adopts a through-chain plate drive structure and is divided into three zones, namely the preheating zone, the temperature-rising zone, and the heat-preservation zone. There are workpieces fixtures fixed on the chain plate. It has one inlet and one outlet, with four workpieces placed in a row, and a total of 23 rows inside the furnace, capable of holding 92 workpieces. The workpiece temperature is detected at the outlet. If the workpiece temperature does not meet the process requirements, it has an alarm function; loading is achieved through a truss manipulator, and unloading is completed by a six-axis robot;

[0059] S11: Vulcanization. The six-axis robot simultaneously grabs four heated workpieces and immerses them into the vulcanization tank. The robot controls the up-and-down movement of the workpieces to complete surface vulcanization, and a layer of nylon is vulcanized on the workpiece surface. Under program control, both the vulcanization time and the number of vulcanization times can be controlled by programming. After vulcanization to the process requirement size, the workpieces are transported to the next process by the robot;

[0060] S12: Cooling. The robot places the workpieces in the cooling turnover area. The cooling turnover area has three workstations and is cooled by a fan. After the workpiece temperature drops below 160°C, it is grabbed and placed on the step-chain cooling conveyor. The temperature can be automatically detected at both the inlet and the outlet of the strong cooling chamber to ensure that it starts to enter the step-chain cooling conveyor for air cooling when the temperature is below 160°C, ensuring that the offline temperature is not higher than 90°C. If it exceeds the process requirements, an alarm prompt will be given. Unloading is achieved by the six-axis robot grabbing and placing it on the work fixture, and it is transported to the waiting processing area or the next process by an AGV cart;

[0061] S13: Broaching and shaping. The cooled workpieces are transported to the designated loading position by an AGV cart, grabbed by the six-axis robot and placed on the positioning fixture of the broaching machine. The small end of the workpiece faces upward, and the robot moves out. The equipment automatically closes the safety door, automatically locates and clamps the internal spline of the spline hub to achieve automatic broaching of the internal spline. After broaching to the process requirement size, the fixture is loosened, the safety door automatically opens, and the robot automatically grabs and places it on the work fixture;

[0062] S14: Turning. The broached workpieces are transported to the designated loading position by an AGV cart, grabbed by the six-axis robot and placed on the positioning fixture of the lathe. At the same time, the positioning mandrel positions and clamps the small diameter of the internal spline. The robot moves out, the equipment automatically closes the safety door, and automatic turning of the large end face and the outer circle of the spline hub is achieved. After turning to the process requirement size, the safety door automatically opens, the fixture automatically loosens after the robot grabs the workpiece, and the robot places the workpiece on the work fixture; it is transported to the finished product storage area by an AGV cart.

[0063] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0064] The terms "upper", "lower", "outer side", "inner side", etc. in the description and claims of the present invention and the above-mentioned drawings, if any, are used to distinguish the relative relationship in position and do not have to be given a qualitative definition. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0065] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spline hub processing technology, characterized in that, It includes the following process steps: S1: Use an AGV cart to transport the tray with workpieces to the specified position. After the tray arrives, the system sends a start instruction to the robot. The robot identifies the position and features of the workpieces through the vision system, guides the robot to pick up the materials, and simultaneously realizes the function of error prevention; S2: The robot grabs the workpiece from the tray and places it on the cleaning loading platform, and then the robot continuously feeds the materials in a cycle; S3: Use a gantry robot to grab the workpiece. The servo motor controls to realize the automatic immersion of the workpiece into the cleaning tank, and at the same time automatically identify whether there is a workpiece. If there is no workpiece, the production line will stop and an alarm will be issued; S4: After the workpiece is dried, sandblasting and blowing are carried out. The workpieces are automatically loaded and unloaded at the station by the robot. There are 4 stations in total on the large turntable of the sandblasting machine, namely the loading and unloading station, the station to be sandblasted, the sandblasting station, and the blowing station; S5: Clean the workpiece according to the operation steps in step S3; S6: After the workpiece is dried, apply primer to the workpiece. The gantry robot grabs the workpiece and immerses it in the primer tank to apply primer, pauses for a few seconds after lifting, and quickly moves to the next process; S7: Heating. The heating furnace adopts a through-type chain plate transmission structure, which is divided into three zones, namely the preheating zone, the temperature rising zone, and the heat preservation zone. There are work fixtures for placing workpieces fixed on the chain plate, with one end for feeding and the other end for discharging. The temperature of the workpiece is detected at the outlet. If the temperature of the workpiece does not meet the process requirements, it has an alarm function; Loading is realized by the gantry robot, and unloading is completed by the robot; S8: Vulcanization. The robot immerses the heated workpiece into the vulcanization tank and controls the up and down movement of the workpiece to complete surface vulcanization. A layer of nylon is vulcanized on the surface of the workpiece. Under program control, the vulcanization time and the number of vulcanization times can be controlled by programming. After vulcanization to the process requirement size, the workpiece is transported to the next process by the robot; S9: Cooling. The robot places the workpiece in the cooling turnover area and cools it with a fan. After the temperature of the workpiece drops below 160°C, it is grabbed onto the step chain cooling conveyor. The temperature can be automatically detected at both the inlet and outlet of the strong cooling chamber to ensure that it starts to enter the step chain cooling conveyor for air cooling when it is below 160°C, and ensure that the offline temperature is not higher than 90°C. If it exceeds the process requirements, an alarm prompt will be issued. The workpiece is grabbed by the robot and placed on the work fixture, and is transported to the waiting processing area or the next process by the AGV cart; S10: Broaching and shaping. The cooled workpiece is transported to the specified loading position by the AGV cart, grabbed by the robot and placed on the positioning fixture of the broaching machine. The small end of the workpiece faces up, and the robot moves out. The equipment automatically closes the safety door, automatically locates and clamps the internal spline of the spline hub, realizes automatic broaching of the internal spline. After broaching to the process requirement size, the fixture is loosened, the safety door automatically opens, and the workpiece is automatically grabbed by the robot and placed on the work fixture; S11: Turning. The workpiece after turning and broaching is transported by an AGV cart to the designated loading position, grasped by a robot and placed on the positioning fixture of the lathe. Meanwhile, the positioning mandrel positions and clamps the minor diameter of the internal spline. The robot moves out, and the equipment automatically closes the safety door to automatically turn the large end face and outer diameter of the spline hub. After turning to the required process size, the safety door automatically opens. The fixture automatically releases after the robot automatically grasps the workpiece. The robot places the workpiece on the workbench fixture and is transported by the AGV cart to the finished product storage area.

2. The spline hub processing technology according to claim 1, characterized in that, In step S2, the workpiece is cleaned by ultrasonic cleaning, which includes two workstations. Four workpieces are cleaned simultaneously at each workstation. The minor end of the workpiece is at the bottom, and the gantry robot can simultaneously grasp four workpieces from the loading platform and place them at this workstation.

3. The spline hub processing technology according to claim 1, characterized in that, Step S3 includes two workstations. Four workpieces are cleaned simultaneously at each workstation. The automatic transfer of the workpiece between processes and the two workstations is achieved by the gantry robot. At each workstation, the workpiece can be automatically immersed in the cleaning tank controlled by a servo motor, and the cleaning tank is filled with water.

4. The spline hub processing technology according to claim 1, characterized in that, Between step S3 and S4, there are also the following process steps: drying. Four workpieces can be processed simultaneously at one workstation. The gantry robot simultaneously grasps four workpieces and blows water off the workpiece surface from top to bottom through the inner and outer ring structure air knives. The automatic transfer of the workpiece between processes is also achieved by the gantry robot.

5. The spline hub processing technology according to claim 4, characterized in that, Before drying the workpiece, the workpiece is immersed in a hot water tank, and whether there is a workpiece is automatically identified. If there is no workpiece, the production line will stop and an alarm will be issued. The automatic transfer of the workpiece between processes is achieved by the gantry robot.

6. The spline hub processing technology according to claim 1, characterized in that, In step S6, the workpiece is dried by natural air drying.

7. The spline hub processing technology according to claim 1, characterized in that, Between step S5 and S6, there are also the following process steps: Four workpieces can be processed simultaneously at one workstation. Automatic lifting can be achieved through servo motor control. The workpiece is immersed in the hot water tank, and whether there is a workpiece is automatically identified. If there is no workpiece, the production line will stop and an alarm will be issued. The automatic transfer of the workpiece between processes is achieved by the gantry robot.

8. The spline hub processing technology according to claim 1, characterized in that, In step S6, the gantry robot simultaneously grasps four workpieces and immerses them in the primer tank to apply primer.

9. The spline hub processing technology according to claim 1, characterized in that, In step S7, four workpieces are placed in a row on the fixture. There are 23 rows in total in the furnace, and 92 workpieces can be placed.

10. The spline hub processing technology according to claim 1, characterized in that, In step S8, the robot simultaneously grasps four heated workpieces and immerses them in the vulcanization tank.

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