A coaxiality calibration device for transmission shaft welding processing

Abstract

The utility model discloses an embodiment provides a kind of coaxiality calibration equipment for transmission shaft welding processing, it is related to transmission shaft processing technical field.It includes pedestal, and pedestal top surface is provided with vertical plate, the top surface of vertical plate is provided with fixed plate, and the top surface of fixed plate is provided with electric telescopic handle, the output of electric telescopic handle is provided with lifting plate, and the lifting plate below is provided with pressing mechanism, the top surface of pedestal is provided with heating mechanism, and heating mechanism is used to place and heat transmission shaft, heating mechanism includes with shell, and shell inside is fixedly provided with heat conduction plate, the top surface of heat conduction plate is placed with mould block, and the mould block is provided with shaft piece groove, the bottom surface of heat conduction plate and shell form heating cavity, and heating cavity is provided with heating pipe.The coaxiality calibration equipment for transmission shaft welding processing is combined by elastic self-adapting pressurization and uniform preheating, can promote the coaxiality precision after transmission shaft welding, effectively reduce vibration noise and prolong the service life of component.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft processing technology, and in particular to a coaxiality calibration device for transmission shaft welding processing. Background Technology

[0002] In the manufacturing of core components of automotive transmission systems, the drive shaft, as a key link connecting the gearbox and drive wheels, has its dynamic balance accuracy primarily dependent on the level of coaxiality control during the welding process.

[0003] Traditional welding processes rely heavily on the experience of operators, using simple clamps to fix the two sections of shaft to be welded before manual or semi-automatic welding. This process has inherent defects from the clamping stage: because the positioning reference of the clamp is not consistent with the welding reference, and the clamping force is unevenly distributed, the coaxiality deviation of the transmission shaft after welding often exceeds the tolerance range, causing total runout and straightness deviation. Under high-speed rotation conditions, such deviations not only aggravate the vibration and abnormal noise of the transmission system, but also reduce the service life of related bearings and connecting parts.

[0004] In existing drive shaft welding and calibration equipment, most traditional fixtures use V-blocks or semi-circular holes with fixed radii, which cannot adapt to the welding requirements of drive shafts with different diameters. This results in the equipment either being unable to clamp shaft segments with diameters deviating from the design value, or having insufficient stability after clamping. The shaft segments are prone to micron-level displacement during clamping. During welding, the two drive shaft segments must be kept strictly on the same axis, but existing devices lack an effective calibration mechanism. For example, some devices can only fix the ends of the shaft segments, but cannot apply precise radial constraints and centering corrections in the critical area where the shaft segments are joined. This results in bending angles between the two shaft segments that are difficult to detect with the naked eye, uneven weld penetration, and stress concentration.

[0005] Therefore, in order to address the above problems, the applicant needs to design a coaxiality calibration device for transmission shaft welding to solve the problem. Utility Model Content

[0006] This application provides a coaxiality calibration device for welding transmission shafts, including a base, with a vertical plate fixedly mounted on the top surface of the base. A fixed plate is fixedly mounted on the top surface of the vertical plate, and an electric telescopic rod is fixedly mounted on the top surface of the fixed plate. The output end of the electric telescopic rod passes through the fixed plate and is fixedly mounted on a lifting plate. A pressing mechanism is fixedly mounted below the lifting plate. A heating mechanism is fixedly mounted on the top surface of the base, and the heating mechanism is used to place and heat the transmission shaft. The heating mechanism includes a housing fixedly connected to the base, and a heat-conducting plate is fixedly mounted inside the housing. A mold block is placed on the top surface of the heat-conducting plate, and a shaft groove is provided in the mold block. A heating cavity is formed between the bottom surface of the heat-conducting plate and the housing, and a heating tube is provided in the heating cavity.

[0007] Preferably, the pressing mechanism includes a lifting block fixedly connected to the lifting plate, and sliders are slidably arranged on both sides of the lifting block. A pressure block is slidably arranged below the sliders in the vertical direction, and the pressure block is used to press the drive shaft. Through the sliding arrangement of the sliders and the pressure block, the pressing mechanism can adapt to the shape of the drive shaft, provide uniform radial constraint, and improve the stability of coaxiality calibration.

[0008] Preferably, a disc spring is fixedly provided on the top surface of the pressure block, and the end of the disc spring away from the pressure block is fixedly connected to the slider. The disc spring structure provides elastic buffering, automatically adjusts the pressure, prevents overpressure from damaging the surface of the transmission shaft, and ensures the smoothness of shaft alignment during the welding process.

[0009] Preferably, a fixing nail is fixedly provided on the outer side of the pressure block, and a connecting spring is provided on the outer side of the fixing nail. A stabilizing nail is provided at the end of the connecting spring away from the fixing nail, and the stabilizing nail is fixedly connected to the slider. The cooperation of the connecting spring and the stabilizing nail enhances the stability of the pressure block, reduces the micro-displacement caused by vibration, and ensures the accuracy of the pressing position.

[0010] Preferably, the slider is provided with a positioning groove, and the inner side of the housing is integrally provided with an anti-fooling post, which is adapted to the positioning groove. The adaptation of the anti-fooling post and the positioning groove ensures the accurate alignment of the slider and the housing, avoids clamping errors, and improves the reliability of equipment operation.

[0011] Preferably, a fixing block is fixedly provided on the outside of the heating tube, and the fixing block is fixedly connected to the inner bottom surface of the shell. The fixing block firmly supports the heating tube, preventing it from shifting or loosening, thereby improving heating uniformity and equipment safety.

[0012] Preferably, an electric heating wire is provided on the inner side of the heating tube, and the electric heating wire is electrically connected to an external power supply. A temperature sensor is connected to the inner side of the heating tube, and the temperature sensor is used to detect and control the internal temperature of the heating tube. The temperature sensor realizes real-time temperature monitoring and adjustment to ensure that the heating process is within the set range and to avoid overheating from affecting the performance of the transmission shaft material.

[0013] Preferably, the fixed plate is fixedly provided with a sliding sleeve, and a guide slide rod is slidably provided on the inner side of the sliding sleeve. One end of the guide slide rod is fixedly connected to the lifting plate. The guide slide rod and the sliding sleeve guide the lifting plate to move vertically, prevent tilting, ensure that the force applied by the pressing mechanism to the transmission shaft is in the same direction, and improve the coaxiality accuracy.

[0014] This utility model provides a coaxiality calibration device for transmission shaft welding, which, compared with the prior art: This coaxiality calibration equipment for welding transmission shafts achieves uniform preheating and stable, flexible radial clamping of the transmission shaft through a controllable heating mechanism and a pressing mechanism with elastic adaptive capabilities. This effectively eliminates micron-level offset and welding stress concentration in traditional clamping, ensuring high-precision coaxiality of the two sections of the transmission shaft during welding, improving the straightness and dynamic balance of the welded product, and ultimately achieving the comprehensive goal of reducing transmission system vibration and abnormal noise and extending the service life of related components. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the heating mechanism of this utility model; Figure 3 This is a three-dimensional sectional view of the heating mechanism of this utility model; Figure 4 This is a three-dimensional structural diagram of the pressing mechanism of this utility model.

[0017] icon: 1. Base; 2. Heating mechanism; 3. Pressing mechanism; 10. Vertical plate; 11. Fixing plate; 12. Electric telescopic rod; 13. Lifting plate; 14. Sliding sleeve; 15. Guide slide rod; 20. Housing; 21. Mold block; 22. Shaft groove; 23. Anti-fooling post; 24. Heat-conducting plate; 25. Heating chamber; 26. Heating tube; 27. Fixing block; 30. Lifting block; 31. Slider; 32. Disc spring; 33. Pressing block; 34. Positioning groove; 35. Stabilizing pin; 36. Connecting spring; 37. Fixing pin. Detailed Implementation

[0018] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] Please refer to Figure 1This utility model provides a coaxiality calibration device for welding and processing a transmission shaft, including a base 1, with a vertical plate 10 fixedly mounted on the top surface of the base 1, a fixed plate 11 fixedly mounted on the top surface of the vertical plate 10, and an electric telescopic rod 12 fixedly mounted on the top surface of the fixed plate 11. The output end of the electric telescopic rod 12 passes through the fixed plate 11 and is fixedly mounted on a lifting plate 13. A pressing mechanism 3 is fixedly mounted below the lifting plate 13. A sliding sleeve 14 is fixedly mounted on the fixed plate 11, and a guide rod 15 is slidably mounted inside the sliding sleeve 14. One end of the guide rod 15 is fixedly connected to the lifting plate 13. Through electric drive and rigid guidance, the pressing mechanism 3 can perform stable and vertical linear motion, providing a solid foundation for subsequent precise and uniform pressing calibration of the transmission shaft and avoiding additional coaxiality deviation caused by tilting of the action.

[0020] like Figure 2 and Figure 3 As shown, a heating mechanism 2 is fixedly installed on the top surface of the base 1. The heating mechanism 2 is used to place and heat the drive shaft. The heating mechanism 2 includes a housing 20 fixedly connected to the base 1. A heat-conducting plate 24 is fixedly installed inside the housing 20. A mold block 21 is placed on the top surface of the heat-conducting plate 24. A shaft groove 22 is provided in the mold block 21. A heating cavity 25 is formed between the bottom surface of the heat-conducting plate 24 and the housing 20. A heating tube 26 is provided in the heating cavity 25. Through the combination of the sealed heating cavity 25 and the heat-conducting plate 24, uniform and controllable preheating of the drive shaft is achieved, which helps to reduce the internal stress and deformation of the material during welding, improve the welding penetration, and thus create favorable conditions for ensuring the coaxiality after welding from the material level.

[0021] A fixing block 27 is fixedly installed on the outside of the heating tube 26, and the fixing block 27 is fixedly connected to the inner bottom surface of the housing 20. An electric heating wire is installed on the inside of the heating tube 26, and the electric heating wire is electrically connected to an external power supply. A temperature sensor is connected to the inside of the heating tube 26, and the temperature sensor is used to detect and control the internal temperature of the heating tube 26. The fixing block 27 ensures the stability and safety of the heating element. The introduction of the temperature sensor realizes the closed-loop control of the heating process, which can effectively prevent the material properties of the drive shaft from deteriorating or the preheating effect from being too hot or too cold, and ensure the consistency of the process.

[0022] like Figure 4As shown, the pressing mechanism 3 includes a lifting block 30 fixedly connected to the lifting plate 13, and sliders 31 are slidably arranged on both sides of the lifting block 30. A pressure block 33 is slidably arranged below the sliders 31 in the vertical direction, and the pressure block 33 is used to press the drive shaft. A disc spring 32 is fixedly arranged on the top surface of the pressure block 33, and the end of the disc spring 32 away from the pressure block 33 is fixedly connected to the slider 31. By utilizing the elastic characteristics of the disc spring 32, the rigid downward pressure is converted into a flexible adaptive clamping force, which can automatically compensate for the slight height deviation or uneven shape of the drive shaft, ensuring that the two sections of the drive shaft are stably and evenly clamped in the mold, effectively preventing the shaft section from being slightly offset due to rigid impact or uneven clamping force.

[0023] To enhance the stability of the pressure block 33, reduce the slight displacement caused by vibration, and ensure the accuracy of the pressing position, a fixing nail 37 is fixedly installed on the outside of the pressure block 33, and a connecting spring 36 is installed on the outside of the fixing nail 37. A stabilizing nail 35 is installed at the end of the connecting spring 36 away from the fixing nail 37, and the stabilizing nail 35 is fixedly connected to the slider 31.

[0024] To ensure accurate alignment between the slider 31 and the housing 20, a positioning groove 34 is provided on the slider 31, and an anti-fooling post 23 is integrally provided on the inner side of the housing 20, and the anti-fooling post 23 is adapted to the positioning groove 34.

[0025] In summary, when using the coaxiality calibration equipment for welding transmission shafts, the two sections of transmission shafts to be welded are placed in the shaft groove 22 of the mold block 21 of the heating mechanism 2. The heating tube 26 is activated to preheat the transmission shafts evenly to reduce welding stress. Subsequently, the electric telescopic rod 12 pushes the lifting plate 13 to descend steadily along the guide slide rod 15, causing the pressing mechanism 3 to move down as a whole, so that the pressure blocks 33 on both sides contact the surface of the transmission shaft and continue to compress the disc spring 32. The adaptive elastic pressure generated by the disc spring 32 is evenly applied to the transmission shaft through the pressure blocks 33, so that it is stably pressed and precisely aligned in the shaft groove 22, thereby ensuring that the two sections of transmission shafts are on the same axis during welding. Finally, the coaxiality calibration and welding are completed under the combined action of heating and pressurization.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A coaxiality calibration device for welding transmission shafts, characterized in that: The system includes a base (1), and a vertical plate (10) is fixedly installed on the top surface of the base (1). A fixing plate (11) is fixedly installed on the top surface of the vertical plate (10), and an electric telescopic rod (12) is fixedly installed on the top surface of the fixing plate (11). The output end of the electric telescopic rod (12) passes through the fixing plate (11) and is fixedly installed with a lifting plate (13). A pressing mechanism (3) is fixedly installed below the lifting plate (13). A heating mechanism (2) is fixedly installed on the top surface of the base (1). The heating mechanism (2) is used to place and heat the drive shaft. The heating mechanism (2) includes a housing (20) fixedly connected to the base (1), and a heat-conducting plate (24) is fixedly arranged inside the housing (20). A mold block (21) is placed on the top surface of the heat-conducting plate (24), and a shaft groove (22) is provided in the mold block (21). A heating cavity (25) is formed between the bottom surface of the heat-conducting plate (24) and the housing (20), and a heating tube (26) is provided in the heating cavity (25).

2. The coaxiality calibration equipment for welding transmission shafts according to claim 1, characterized in that: The pressing mechanism (3) includes a lifting block (30) fixedly connected to the lifting plate (13), and sliders (31) are slidably arranged on both sides of the lifting block (30). A pressure block (33) is slidably arranged below the slider (31) in the vertical direction, and the pressure block (33) is used to press the drive shaft.

3. The coaxiality calibration equipment for welding transmission shafts according to claim 2, characterized in that: A disc spring (32) is fixedly provided on the top surface of the pressure block (33), and the end of the disc spring (32) away from the pressure block (33) is fixedly connected to the slider (31).

4. The coaxiality calibration equipment for welding transmission shafts according to claim 2, characterized in that: A fixing nail (37) is fixedly provided on the outside of the pressure block (33), and a connecting spring (36) is provided on the outside of the fixing nail (37). A stabilizing nail (35) is provided at the end of the connecting spring (36) away from the fixing nail (37), and the stabilizing nail (35) is fixedly connected to the slider (31).

5. The coaxiality calibration equipment for welding transmission shafts according to claim 2, characterized in that: The slider (31) is provided with a positioning groove (34), and the inner side of the housing (20) is integrally provided with a foolproof post (23), and the foolproof post (23) is adapted to the positioning groove (34).

6. The coaxiality calibration equipment for welding transmission shafts according to claim 1, characterized in that: A fixing block (27) is fixedly installed on the outside of the heating tube (26), and the fixing block (27) is fixedly connected to the inner bottom surface of the shell (20).

7. The coaxiality calibration equipment for welding transmission shafts according to claim 1, characterized in that: The heating tube (26) is provided with a heating wire on its inner side, and the heating wire is electrically connected to an external power supply. A temperature sensor is connected to the inner side of the heating tube (26), and the temperature sensor is used to detect and control the internal temperature of the heating tube (26).

8. The coaxiality calibration equipment for welding transmission shafts according to claim 1, characterized in that: The fixed plate (11) is fixedly provided with a sliding sleeve (14), and a guide rod (15) is slidably provided on the inner side of the sliding sleeve (14), and one end of the guide rod (15) is fixedly connected to the lifting plate (13).

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