Three-section type motor shaft welding positioning clamp

Abstract

The invention relates to the technical field of welding clamps, and provides a three-section type motor shaft welding positioning clamp which comprises a clamp rack, a clamping jaw assembly and a preheating assembly, a sliding rail is arranged on the clamp rack, a first sliding frame and a second sliding frame are installed on the sliding rail in a sliding mode, and the first sliding frame is located on the upper portion of the second sliding frame. The motor shaft body comprises a first part, a second part and a third part, the clamping jaw assembly comprises a top clamping assembly, a middle clamping assembly and a bottom clamping assembly, the top clamping assembly is installed on the upper bearing frame, the middle clamping assembly is installed on the second sliding frame, and the bottom clamping assembly is installed on the lower bracket. Preheating assemblies are installed in the upper bearing frame and the lower bearing frame correspondingly, and the technical problem that in the prior art, when a three-section type motor shaft is welded, spot welding positioning needs to be conducted before each welding seam is welded, the welding position needs to be preheated, and therefore the production efficiency is low is solved.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, and more specifically, to a positioning fixture for welding a three-section motor shaft. Background Technology

[0002] As new energy vehicles continue to squeeze the market share of traditional fuel vehicles, the key component electric drive system will usher in huge market development space. The motor shaft, as a cylindrical component extending from the motor and its housing in the electric drive system, is the main support and connection of the armature part of the motor, as well as the output component of the power generated by the motor. The purpose of the motor shaft is to convert the energy of the motor into its final use, to provide the speed and torque of the motor, and it is one of the essential components of the motor.

[0003] Currently, there are various ways to achieve lightweight motor shafts. In terms of manufacturing processes, there are mainly three types: solid shaft drilling, welding, and one-piece molding. Among them, welded hollow shafts achieve a hollow structure through laser welding. In existing technology, the traditional three-section motor shaft manufacturing process first fixes the shaft by spot welding, and then welds it together by laser welding. Since this is generally done manually, it is easy to cause unstable operation quality and it is difficult to achieve automated production. At the same time, in the specific operation process, each weld seam must be preheated in a heating furnace before welding, resulting in low production efficiency, poor positioning accuracy, and thus affecting the welding quality. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a positioning fixture for welding a three-section motor shaft, which solves the technical problem in the prior art that when welding a three-section motor shaft, it is necessary to first position it by spot welding before welding each weld and preheat the welding position, resulting in low production efficiency.

[0005] According to one aspect, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, including a fixture frame, a slide rail provided on the fixture frame, a first sliding frame and a second sliding frame slidably mounted on the slide rail, the first sliding frame being located above the second sliding frame, and further comprising: The upper support frame and the lower support frame are provided. The upper support frame is fixedly installed on the first sliding frame, and the lower support frame is fixedly installed on the clamp frame. A lower bracket is fixedly installed on the side of the lower support frame. A gripper assembly for gripping a motor shaft body, the motor shaft body including a first component, a second component and a third component, the gripper assembly including a top gripping assembly, a middle gripping assembly and a bottom gripping assembly, the top gripping assembly being mounted on the upper support frame for gripping the first component, the middle gripping assembly being mounted on the second sliding frame for gripping the second component, and the bottom gripping assembly being mounted on the lower bracket for gripping the third component; The first, second, and third components, after being clamped, are arranged coaxially and docked together. The preheating components are installed inside both the upper and lower support frames to preheat the welding positions of the motor shaft body.

[0006] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, which further includes an adjustment device and a pressing drive. The adjustment device is fixedly installed on the fixture frame and is used to adjust the position of the second sliding frame. The pressing drive is installed on the fixture frame and the output end of the pressing drive is fixedly connected to the first sliding frame.

[0007] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the top clamping assembly includes: A top positioning frame, which is fixedly installed on the upper support frame; Top grippers, two of which are symmetrically and slidably mounted on the top positioning frame; The first driving component has two symmetrically and fixedly installed inside the top positioning frame, and the output end of the first driving component is fixedly connected to the top gripper.

[0008] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the middle clamping assembly includes: A central positioning frame, which is fixedly mounted on the second sliding frame; The central gripper has two central grippers that are symmetrically and slidably mounted on the central positioning frame, and each central gripper has a receiving groove. The second driving component is symmetrically and fixedly installed inside the central positioning frame. The output end of the second driving component is fixedly connected to the central gripper.

[0009] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the bottom clamping assembly includes: A sliding frame, which is slidably mounted on the lower bracket; A three-jaw chuck is rotatably mounted on the top of the sliding frame; A support drive component is fixedly installed inside the lower bracket, and the output end of the support drive component is fixedly connected to the inner top wall of the sliding frame.

[0010] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the preheating assembly includes: The positioning frame is slidably installed inside both the upper and lower support frames, and the two positioning frames are arranged symmetrically. The positioning drive is fixedly installed inside both the upper and lower support frames, and the output end of the positioning drive is fixedly connected to the positioning frame. The preheating unit is installed on the adjustment frame and is used to preheat the welding position of the motor shaft body.

[0011] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the preheating part includes: Heating devices are fixedly installed on both of the adjustment frames; The outer casing is fixedly mounted on the heating device via a bracket. The outer casing is arranged coaxially with the motor shaft body; An induction heating coil is fixedly installed inside the housing and is electrically connected to the heating device.

[0012] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, which further includes a drive assembly for driving the three-jaw chuck to rotate during the welding process. The drive assembly includes: A sleeve and a bushing, wherein the bushing is coaxially and slidably installed inside the bushing, the bushing is rotatably installed on the lower bracket, and the bushing is coaxially and fixedly connected to the bottom of the three-jaw chuck; The bottom end of the sleeve is used to connect to the output end of the drive device; A clamping part is mounted on the top positioning frame and is used to press against the first component.

[0013] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein the clamping part includes: A pressing frame, which is fixedly mounted on the top positioning frame; A clamping drive is fixedly installed inside the clamping frame, and the output end of the clamping drive points to the first component.

[0014] For example, at least one embodiment of the present invention provides a positioning fixture for welding a three-section motor shaft, wherein a clamping column is rotatably mounted on the output end of the clamping drive component, the clamping column is coaxially arranged with the three-jaw chuck, and an anti-slip ring is provided at the bottom of the clamping column.

[0015] The beneficial effects of this invention are as follows: 1. In this invention, the coaxiality of the three-section motor shaft body is ensured before welding by a one-time clamping of three sets of self-centering clamping jaws: a bottom three-jaw chuck, a middle jaw, and a top jaw, and by calibration using a high-precision sliding frame and an adjustment device. This facilitates the improvement of the coaxiality of the welded product and the uniform quality of the weld.

[0016] 2. In this invention, after clamping the first, second, and third components and aligning their welding positions, the welding positions can be preheated simultaneously. This achieves simultaneous preheating and sequential welding, eliminating the time required for repeated transfers and phased preheating of the workpiece between the furnace and the workstation in traditional processes, thus improving production efficiency.

[0017] 3. In this invention, the gripper assembly enables one-time segmented clamping of the three-section motor shaft while ensuring coaxiality. With the cooperation of the drive assembly, when the motor shaft needs to be driven to rotate during preheating or welding, it not only transmits torque but also provides clamping force, facilitating welding or preheating. The preheating assembly not only allows for quick preheating of the welding position but also allows for position adjustment, solving the interference problem of traditional fixed coils on loading and unloading. This optimizes the equipment's spatial layout, resulting in a compact system structure and coordinated operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional view of the structure from another angle in this invention; Figure 4 This is a schematic diagram of the structure of the motor shaft body in this invention; Figure 5 This is a cross-sectional view of the top clamping assembly in this invention. Figure 6 This is a cross-sectional view of the preheating component and the upper support frame in this invention. Figure 7 This is a cross-sectional view of the central clamping component in this invention. Figure 8 This is a cross-sectional view of the bottom clamping component in this invention. Figure 9 This is a cross-sectional view of the bottom clamping assembly from another angle in this invention. Figure 10 This is a cross-sectional view of the lower support frame and preheating assembly in this invention.

[0020] In the diagram: 1. Fixture frame; 2. Slide rail; 3. First sliding frame; 4. Second sliding frame; 5. Upper support frame; 6. Lower support frame; 7. Lower bracket; 8. Motor shaft body; 801. First component; 802. Second component; 803. Third component; 9. Adjustment device; 10. Downward pressing drive; 11. Top positioning frame; 12. Top gripper; 13. First drive; 14. Middle positioning frame; 15. Middle gripper; 16. Receiving groove; 17. Second drive; 18. Sliding frame; 19. Three-jaw chuck; 20. Support drive; 21. Adjustment frame; 22. Adjustment drive; 23. Heating device; 24. Housing; 25. Bracket; 26. Induction heating coil; 27. Sleeve shaft; 28. Sleeve; 29. ​​Pressing frame; 30. Pressing drive; 31. Pressing column. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0022] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0023] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] like Figures 1 to 10As shown, a positioning fixture for welding a three-section motor shaft according to an embodiment of the present invention is illustrated. It includes a fixture frame 1, a slide rail 2 on the fixture frame 1, a first sliding frame 3 and a second sliding frame 4 slidably mounted on the slide rail 2, the first sliding frame 3 being located above the second sliding frame 4. It also includes an upper support frame 5, a lower support frame 6, a gripper assembly, and a preheating assembly. The upper support frame 5 is fixedly mounted on the first sliding frame 3, and the lower support frame 6 is fixedly mounted on the fixture frame 1. A lower support frame 7 is fixedly mounted on the side of the lower support frame 6. The gripper assembly is used to grip the motor shaft body 8. The motor shaft body 8 includes a first component 801, a second component 802, and a third component 803. The gripper assembly includes a top gripping assembly and a middle gripping assembly. The fixture includes a top clamping assembly mounted on the upper support frame 5 for clamping the first component 801, a middle clamping assembly mounted on the second sliding frame 4 for clamping the second component 802, and a bottom clamping assembly mounted on the lower support frame 7 for clamping the third component 803. The clamped components 801, 802, and 803 are coaxially arranged and connected together. The fixture also includes an adjustment device 9 and a pressing drive 10. The adjustment device 9 is fixedly mounted on the fixture frame 1 for adjusting the position of the second sliding frame 4. The pressing drive 10 is mounted on the fixture frame 1 and can be configured as a cylinder. The output end of the pressing drive 10 is fixedly connected to the first sliding frame 3.

[0028] Specifically, when welding a three-section motor shaft body 8, first adjust the position of the preheating component to avoid obstructing the installation of the motor shaft body 8. Then, move the third component 803, which makes up the motor shaft body 8, to the clamping position of the bottom clamping component and fix the third component 803. Then, move the first component 801 to the clamping position of the top clamping component and fix the first component 801. Move the second component 802 to the middle clamping component and fix the second component 802. The clamping position of the second component 802 can be adjusted to accommodate second components 802 of different sizes. At this time, the first component 801, the second component 802, and the third component 803 are arranged coaxially. When installing the first component 801, the second component 802, and the third component 803, the operation can be carried out by the loading component of the robotic arm (not shown in the figure).

[0029] After installing the first component 801, the second component 802, and the third component 803, activate the downward drive component 10 to move the first sliding frame 3. At this time, the first sliding frame 3, through the upper support frame 5, pushes the top clamping assembly downwards, thereby aligning the welding position of the first component 801 with the welding position of the second component 802. Then, activate the bottom clamping assembly to move the third component 803 upwards until the welding position of the third component 803 aligns with the welding position of the second component 802. At this point, the first component 801, the second component 802, and the third component 803 are aligned and concentrically arranged. Then, adjust the upper support frame 5 and the lower... The position of the preheating component inside the support frame 6 is adjusted to the docking position of the first component 801 and the second component 802, and the docking position of the second component 802 and the third component 803. At this time, the first component 801, the second component 802 and the third component 803 are pressed together, and the top clamping component and the middle clamping component are released. The bottom clamping component is used to drive the first component 801, the second component 802 and the third component 803 to rotate. At this time, the welding position is preheated simultaneously. After the preheating is completed, the preheating component is retracted, and then the welding position is welded by the welding device until the first component 801, the second component 802 and the third component 803 are welded together.

[0030] After welding is completed, the motor shaft body 8 is clamped by the middle clamping component, the bottom clamping component is released, and then the top clamping component and the bottom clamping component are removed, along with the corresponding preheating component. Then, the welded motor shaft body 8 is clamped by the robotic arm loading component, and the middle clamping component is released to remove the welded motor shaft body 8.

[0031] like Figure 5 As shown above, the top clamping assembly includes a top positioning frame 11, top grippers 12 and a first driving member 13. The top positioning frame 11 is fixedly mounted on the upper support frame 5. Two top grippers 12 are symmetrically and slidably mounted on the top positioning frame 11. Two first driving members 13 are symmetrically and fixedly mounted inside the top positioning frame 11. The output end of the first driving member 13 is fixedly connected to the top grippers 12.

[0032] Specifically, when it is necessary to clamp the first component 801, the two first driving components 13 are activated simultaneously. The first driving components 13 push the corresponding top grippers 12 to move, thereby fixing the position of the first component 801 through the two top grippers 12. When it is necessary to release the first component 801, the two first driving components 13 are retracted simultaneously, thereby releasing the two top grippers 12.

[0033] like Figure 7As shown above, the central clamping assembly includes a central positioning frame 14, central grippers 15, and a second driving member. The central positioning frame 14 is fixedly mounted on the second sliding frame 4. Two central grippers 15 are symmetrically and slidably mounted on the central positioning frame 14. The central grippers 15 are provided with receiving grooves 16. The receiving grooves 16 are designed to accommodate the working end of the loading component of the robot arm, which facilitates the loading and unloading of the second component 802. Two second driving members 17 are symmetrically and fixedly mounted inside the central positioning frame 14. The output end of the second driving member 17 is fixedly connected to the central grippers 15.

[0034] Both the first driving component 13 and the second driving component 17 can be configured as cylinders.

[0035] Specifically, when it is necessary to clamp the second component 802, the two second drive members 17 are activated simultaneously. The second drive members 17 push the corresponding middle gripper 15 to move, thereby fixing the position of the second component 802 through the two middle grippers 15. When it is necessary to release the second component 802, the two second drive members 17 are retracted simultaneously, thereby releasing the two middle grippers 15.

[0036] The positions on the top gripper 12 and the middle gripper 15 that contact the workpiece are both set as two symmetrically arranged inclined surfaces to achieve the self-centering function.

[0037] like Figure 8 , Figure 9 As shown above, the bottom clamping assembly includes a sliding frame 18, a three-jaw chuck 19, and a support drive component 20. The sliding frame 18 is slidably mounted on the lower bracket 7. The three-jaw chuck 19 is rotatably mounted on the top of the sliding frame 18. The three-jaw chuck 19 has an automatic centering function. The support drive component 20 is fixedly mounted inside the lower bracket 7. The support drive component 20 can be configured as a cylinder. The output end of the support drive component 20 is fixedly connected to the inner top wall of the sliding frame 18.

[0038] Specifically, when clamping the third component 803, the third component 803 is moved to the clamping position of the three-jaw chuck 19 and fixed by the three-jaw chuck 19. When it is necessary to release the third component 803, the three-jaw chuck 19 is released.

[0039] When it is necessary to align the welding positions of the third component 803 and the second component 802, the support drive component 20 is activated, and the sliding frame 18 is pushed to move on the lower bracket 7, thereby adjusting the position of the third component 803.

[0040] like Figure 6 , Figure 10As shown, both the upper support frame 5 and the lower support frame 6 are equipped with preheating components for preheating the welding position of the motor shaft body 8. The preheating components include an adjustment frame 21, an adjustment drive component 22, and a preheating section. The adjustment frame 21 is slidably installed inside both the upper support frame 5 and the lower support frame 6. The two adjustment frames 21 are arranged symmetrically. The adjustment drive component 22 is fixedly installed inside both the upper support frame 5 and the lower support frame 6. The adjustment drive component 22 can be configured as a cylinder. The output end of the adjustment drive component 22 is fixedly connected to the adjustment frame 21. The adjustment frame 21 is equipped with a preheating section for preheating the welding position of the motor shaft body 8.

[0041] Specifically, when clamping the first component 801, the adjustment drive 22 inside the upper support frame 5 is adjusted to adjust the relative position of the upper support frame 5 and the corresponding adjustment frame 21, thereby adjusting the position of the upper preheating part to facilitate the installation of the first component 801. When it is necessary to preheat the welding position of the first component 801 and the second component 802, the preheating part is moved to the preheating position and turned on. When it is necessary to weld the welding position of the first component 801 and the second component 802, the upper adjustment drive 22 is turned on again to move the position of the preheating part away.

[0042] When clamping the third component 803, adjust the adjustment drive 22 inside the lower support frame 6 to adjust the relative position of the lower support frame 6 and the corresponding adjustment frame 21, and adjust the position of the lower preheating part to facilitate the installation of the third component 803. When it is necessary to preheat the welding position of the third component 803 and the second component 802, move the preheating part to the preheating position and turn on the preheating part. When it is necessary to weld the welding position of the third component 803 and the second component 802, turn on the lower adjustment drive 22 again to move the position of the preheating part away.

[0043] After welding is completed, the adjustment drive component 22 can be retracted and the preheating section can be removed.

[0044] like Figure 6 , Figure 10 As shown above, the preheating section includes a heating device 23, a housing 24, and an induction heating coil 26. The heating device 23 is fixedly installed on both adjustment frames 21. The housing 24 is fixedly installed on the heating device 23 through a bracket 25. The housing 24 is coaxially arranged with the motor shaft body 8. The induction heating coil 26 is fixedly installed inside the housing 24 and is electrically connected to the heating device 23.

[0045] Specifically, when it is necessary to clamp the first component 801 or the third component 803, the position of the outer shell 24 needs to be moved first to avoid affecting the clamping of the first component 801 or the third component 803. After the first component 801, the second component 802 and the third component 803 are connected, the outer shell 24 is moved to the preheating position, the heating device 23 is turned on, and preheating is performed through the induction heating coil 26 and the preheating position. After the preheating is completed, the position of the outer shell 24 is moved, and welding can be performed.

[0046] like Figure 5 , Figure 8 , Figure 9 As shown, it also includes a drive assembly for driving the three-jaw chuck 19 to rotate during the welding process. The drive assembly includes a sleeve shaft 27, a sleeve 28, and a clamping part. The sleeve shaft 27 is coaxially and slidably installed inside the sleeve 28. The sleeve shaft 27 is rotatably installed on the lower bracket 7. The sleeve 28 is coaxially and fixedly connected to the bottom of the three-jaw chuck 19. The bottom end of the sleeve 28 is used to connect to the output end of the drive device. The clamping part is installed on the top positioning frame 11 and is used to press against the first component 801.

[0047] It should be noted that the bottom of the sleeve 27 is coaxially connected to the output shaft of the machine tool spindle box for transmitting power.

[0048] Specifically, when adjusting the relative positions of the lower bracket 7 and the sliding frame 18, the sleeve shaft 27 and the sleeve 28 undergo axial displacement, and the clamping part is opened to clamp the first component 801, the second component 802, and the third component 803. Then, the top jaw 12 and the middle jaw 15 are released. When it is necessary to drive the clamped first component 801, the second component 802, and the third component 803 to rotate, the machine tool drives the sleeve shaft 27 to rotate. The sleeve shaft 27 drives the three-jaw chuck 19 to rotate through the sleeve 28, thereby driving the clamped first component 801, the second component 802, and the third component 803 to rotate, which facilitates preheating and welding.

[0049] like Figure 5 As shown, the aforementioned clamping unit includes a clamping frame 29 and a clamping drive component 30. The clamping frame 29 is fixedly mounted on the top positioning frame 11. The clamping drive component 30 is fixedly installed inside the clamping frame 29. The clamping drive component 30 can be configured as a cylinder. The output end of the clamping drive component 30 points towards the first component 801. A clamping column 31 is rotatably mounted on the output end of the clamping drive component 30. The clamping column 31 is coaxially arranged with the three-jaw chuck 19. An anti-slip ring is provided at the bottom of the clamping column 31.

[0050] Specifically, when it is necessary to axially press the first component 801, the second component 802, and the third component 803, the pressing drive 30 is activated, thereby pushing the pressing column 31 against the first component 801, thereby pressing the first component 801, the second component 802, and the third component 803. When it is driven to rotate, the pressing column 31 rotates relative to the output end of the pressing drive 30.

[0051] The working principle or usage process of this application is as follows: When welding the three-section motor shaft body 8, first move the third component 803, which makes up the motor shaft body 8, to the clamping position of the three-jaw chuck 19, and fix the third component 803 with the three-jaw chuck 19. During this process, adjust the adjustment drive component 22 inside the lower support frame 6 to adjust the relative position of the lower support frame 6 and the corresponding adjustment frame 21, and adjust the preheating position of the lower part to facilitate the installation of the third component 803. Then, move the first component 801 to the clamping position. When the first component 801 needs to be clamped, simultaneously activate the two first drive components 13. The first drive components 13 push the corresponding top jaws 12 to move, thereby fixing the position of the first component 801 with the two top jaws 12. During this process, adjust the adjustment drive component 22 inside the upper support frame 5 to adjust the position of the upper support frame 5. The relative position of the frame 5 and the corresponding adjustment frame 21 is adjusted, and the upper preheating position is adjusted to facilitate the installation of the first component 801. Then, the second component 802 is moved to the position of the middle gripper 15. At this time, the two second drive components 17 are activated simultaneously. The second drive components 17 push the corresponding middle gripper 15 to move, thereby fixing the position of the second component 802 through the two middle grippers 15. During this process, the position of the second sliding frame 4 can be adjusted by the adjustment device 9, thereby adjusting the clamping position of the second component 802 to adapt to the second component 802 of different sizes. The positions of the top gripper 12 and the middle gripper 15 that contact the workpiece are set as two symmetrically arranged inclined surfaces to achieve the self-centering function, so that the first component 801, the second component 802 and the third component 803 are arranged coaxially.

[0052] After the first component 801, the second component 802, and the third component 803 are installed, the downward drive component 10 is activated, thereby pushing the first sliding frame 3 to move. At this time, the first sliding frame 3 pushes the corresponding first component 801 downward through the upper support frame 5, thereby abutting the welding position of the first component 801 with the welding position of the second component 802. Then, the support drive component 20 is activated, pushing the sliding frame 18 to move on the lower support frame 7, thereby pushing the third component 803 upward until the welding position of the third component 803 abuts the welding position of the second component 802. At this time, the first component 801, the second component 802, and the third component 803 are connected together and remain concentrically arranged.

[0053] Then, the welding positions are preheated. When the welding positions of the first component 801 and the second component 802 need to be preheated, the corresponding outer shell 24 is moved to the preheating position. When the welding positions of the third component 803 and the second component 802 need to be preheated, the corresponding outer shell 24 is moved to the preheating position. Then, the corresponding heating device 23 is turned on, and the preheating position is preheated through the induction heating coil 26. After the preheating is completed, the outer shell 24 is removed.

[0054] During welding or preheating, the clamping drive 30 is activated, thereby pushing the clamping column 31 against the first component 801, thus clamping the first component 801, the second component 802, and the third component 803. Then, the top jaw 12 and the middle jaw 15 are released. When it is necessary to drive the clamped first component 801, the second component 802, and the third component 803 to rotate, the machine tool drives the sleeve shaft 27 to rotate. The sleeve shaft 27 drives the three-jaw chuck 19 to rotate through the sleeve 28, thereby driving the clamped first component 801, the second component 802, and the third component 803 to rotate, which facilitates preheating and welding. When it is driven to rotate, the clamping column 31 rotates relative to the output end of the clamping drive 30. Then, the welding device welds the welding position until the first component 801, the second component 802, and the third component 803 are welded together.

[0055] After welding is completed, the motor shaft body 8 is held by the middle jaw 15, the three-jaw chuck 19 is released, the top jaw 12 and the three-jaw chuck 19 are removed, and the corresponding housing 24 and heating device 23 are removed. Then, the welded motor shaft body 8 is held by the robotic arm loading component, and the middle jaw 15 is released to remove the welded motor shaft body 8.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A positioning fixture for welding a three-section motor shaft, comprising a fixture frame (1), wherein a slide rail (2) is provided on the fixture frame (1), characterized in that, The slide rail (2) is slidably mounted with a first sliding bracket (3) and a second sliding bracket (4), the first sliding bracket (3) being located above the second sliding bracket (4), and further comprising: The upper support frame (5) and the lower support frame (6) are fixedly installed on the first sliding frame (3), and the lower support frame (6) is fixedly installed on the clamp frame (1). The lower support frame (7) is fixedly installed on the side of the lower support frame (6). A gripper assembly is provided for gripping a motor shaft body (8). The motor shaft body (8) includes a first component (801), a second component (802), and a third component (803). The gripper assembly includes a top gripping component, a middle gripping component, and a bottom gripping component. The top gripping component is mounted on the upper support frame (5) and is used to grip the first component (801). The middle gripping component is mounted on the second sliding frame (4) and is used to grip the second component (802). The bottom gripping component is mounted on the lower bracket (7) and is used to grip the third component (803). The first component (801), the second component (802), and the third component (803) are arranged coaxially and docked together after being clamped. The preheating components are installed inside both the upper support frame (5) and the lower support frame (6) to preheat the welding position of the motor shaft body (8).

2. The positioning fixture for welding a three-section motor shaft according to claim 1, characterized in that, It also includes a positioning device (9) and a pressing drive (10). The positioning device (9) is fixedly installed on the fixture frame (1) and is used to adjust the position of the second sliding frame (4). The pressing drive (10) is installed on the fixture frame (1) and the output end of the pressing drive (10) is fixedly connected to the first sliding frame (3).

3. The positioning fixture for welding a three-section motor shaft according to claim 2, characterized in that, The top clamping assembly includes: Top positioning frame (11), which is fixedly installed on the upper support frame (5); Top gripper (12): Two top grippers (12) are symmetrically and slidably mounted on the top positioning frame (11). The first driving component (13) is symmetrically and fixedly installed inside the top positioning frame (11), and the output end of the first driving component (13) is fixedly connected to the top gripper (12).

4. A positioning fixture for welding a three-section motor shaft according to claim 3, characterized in that, The central clamping assembly includes: A central positioning frame (14) is fixedly mounted on the second sliding frame (4); Two central grippers (15) are symmetrically and slidably mounted on the central positioning frame (14), and the central grippers (15) are provided with receiving grooves (16). The second drive unit (17) is symmetrically and fixedly installed inside the central positioning frame (14). The output end of the second drive unit (17) is fixedly connected to the central gripper (15).

5. A positioning fixture for welding a three-section motor shaft according to claim 4, characterized in that, The bottom clamping assembly includes: A sliding frame (18) is slidably mounted on the lower bracket (7); Three-jaw chuck (19), the sliding frame (18) is rotatably mounted on the top of the three-jaw chuck (19); A support drive (20) is fixedly installed inside the lower bracket (7), and the output end of the support drive (20) is fixedly connected to the inner top wall of the sliding frame (18).

6. A positioning fixture for welding a three-section motor shaft according to claim 5, characterized in that, The preheating component includes: The adjustment frame (21) is slidably installed inside both the upper support frame (5) and the lower support frame (6), and the two adjustment frames (21) are arranged symmetrically. The position adjustment drive (22) is fixedly installed inside both the upper support frame (5) and the lower support frame (6), and the output end of the position adjustment drive (22) is fixedly connected to the position adjustment frame (21). The preheating unit is installed on the adjustment frame (21) and is used to preheat the welding position of the motor shaft body (8).

7. A positioning fixture for welding a three-section motor shaft according to claim 6, characterized in that, The preheating section includes: Heating device (23) is fixedly installed on both of the two adjustment frames (21); The outer casing (24) is fixedly mounted on the heating device (23) by a bracket (25). The outer casing (24) is coaxially arranged with the motor shaft body (8); An induction heating coil (26) is fixedly installed inside the outer casing (24), and the induction heating coil (26) is electrically connected to the heating device (23).

8. A positioning fixture for welding a three-section motor shaft according to claim 7, characterized in that, It also includes a drive assembly for driving the three-jaw chuck (19) to rotate during the welding process, the drive assembly comprising: A sleeve shaft (27) and a sleeve (28) are provided. The sleeve shaft (27) is coaxially and slidably installed inside the sleeve (28). The sleeve shaft (27) is rotatably installed on the lower bracket (7). The sleeve (28) is coaxially and fixedly connected to the bottom of the three-jaw chuck (19). The bottom end of the sleeve (28) is used to connect to the output end of the drive device; A clamping part is mounted on the top positioning frame (11) and is used to press against the first component (801).

9. A positioning fixture for welding a three-section motor shaft according to claim 8, characterized in that, The clamping part includes: A pressing frame (29) is fixedly mounted on the top positioning frame (11); A pressing drive (30) is fixedly installed inside the pressing frame (29), and the output end of the pressing drive (30) points to the first component (801).

10. A positioning fixture for welding a three-section motor shaft according to claim 9, characterized in that, The output end of the clamping drive (30) is rotatably mounted with a clamping column (31), and the clamping column (31) is coaxially arranged with the three-jaw chuck (19).

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