A plastic fuel injector press weld fixture and method of use

Abstract

The application provides a plastic oil injection pipe compression welding clamp and a use method thereof, which comprises a feeding assembly, a compression assembly and a positioning assembly. The feeding assembly comprises a product containing mechanism and a horizontal moving mechanism. The product containing mechanism comprises a first containing plate and a second containing plate. The first containing plate is provided with a first profiling groove. The second containing plate is provided with a second profiling groove. The front end of the first profiling groove is provided with a secondary positioning mechanism. The compression assembly comprises a profiling pressing block and a lifting mechanism. The lifting mechanism promotes the lifting of the profiling pressing block. The positioning assembly comprises a positioning shaft, a positioning telescopic mechanism which promotes the lifting of the positioning shaft, and a positioning moving mechanism which promotes the horizontal movement of the positioning shaft. The application can accurately position and reliably clamp the oil injection pipe, meets the flatness requirement of the oil injection pipe product, is suitable for the automatic production line and various processing procedures, and significantly improves the processing quality and production efficiency of the automobile oil injection pipe.

Description

Technical Field

[0001] This invention relates to the field of laser welding fixture technology, and in particular to a plastic oil spray pipe press-fit welding fixture and its usage method. Background Technology

[0002] Existing fuel injection pipe welding fixtures lack sufficient positioning accuracy. Since fuel injection pipes are mostly slender and curved, fixtures often use simple clips or bolts for tightening, making precise positioning difficult and prone to errors. This leads to welding misalignment, side hole machining deviations, and other problems, affecting the assembly accuracy and performance of the fuel injection pipes, and causing operational inconvenience. Furthermore, most fixtures use manual clamping, which is labor-intensive, difficult to adapt to automated production lines, and inconvenient for cleaning and maintaining the fixtures, further impacting production efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a plastic fuel injection pipe pressing and welding fixture and its usage method, which can accurately position and reliably clamp the fuel injection pipe, meet the flatness requirements of the fuel injection pipe product, adapt to automated production lines and various processing procedures, is easy to operate, and significantly improves the processing quality and production efficiency of automotive fuel injection pipes.

[0004] The embodiments of the present invention are achieved through the following technical solutions: A plastic fuel injector pipe press-welding fixture, comprising: The feeding assembly includes a product receiving mechanism and a horizontal moving mechanism. The product receiving mechanism includes a first receiving plate and a second receiving plate. The first receiving plate is provided with a first contouring groove for placing a first oil pipe body. The second receiving plate is provided with a second contouring groove for accommodating a second oil pipe body. A secondary positioning mechanism is provided at the front end of the first contouring groove for fixing the second oil pipe body on the second contouring groove. The pressing assembly includes a contour pressing block and a lifting mechanism; the contour pressing block is provided with a welding groove, and the lifting mechanism causes the contour pressing block to move up and down to cover the oil pipe cover with the first oil pipe body; The positioning assembly includes a positioning shaft, a positioning telescopic mechanism that causes the positioning shaft to move up and down, and a positioning moving mechanism that causes the positioning shaft to move horizontally. The positioning moving mechanism is disposed above the contouring block, and the positioning shaft can pass through the contouring block in sequence and fill the end hole of the first oil pipe body.

[0005] According to a preferred embodiment, the first receiving plate includes a plurality of first receiving parts, each receiving part being provided with a first receiving groove, and the plurality of first receiving grooves being connected to form a first contouring groove, the contouring groove being adapted to the shape and size of the first oil pipe body.

[0006] According to a preferred embodiment, a plurality of the first accommodating parts are all disposed on the mounting plate by elastic elements, and the moving end of the horizontal moving mechanism is connected to the mounting plate. The mounting plate is provided with a plurality of first guide posts, and each of the first receiving parts is provided with a first guide hole.

[0007] According to a preferred embodiment, each of the first accommodating parts is detachably and fixedly connected to the mounting plate via an adjustable height adjustment member.

[0008] According to a preferred embodiment, the first receiving plate and the second receiving plate are respectively disposed on the upper and lower sides of the mounting plate, and the front end of the first contour groove is provided with a slot, the slot vertically penetrating the mounting plate and located at the end of the second contour groove. The secondary positioning mechanism includes a secondary pressing component and a secondary positioning component; The secondary pressing component is disposed at the slot, the secondary positioning component is disposed above the front end of the second contour groove, and the bottom of the secondary positioning component is provided with an air nozzle positioning pin.

[0009] According to a preferred embodiment, the first receiving plate has a plurality of positioning grooves, the positioning grooves are disposed outside the first contour groove and communicate with the first contour groove; the positioning grooves are provided with limiting pins for limiting the first oil pipe body. The first receiving plate is provided with a first positioning pin, and the bottom of the contour pressing block is provided with a corresponding positioning hole.

[0010] According to a preferred embodiment, the slot is arc-shaped to fit the outer wall of the end of the second oil pipe body; The side of the secondary pressing component facing the slot is rounded. The top of the secondary pressing component is provided with a second positioning pin that matches the shape and size of the positioning hole; One end of the secondary pressing component is connected to the adjacent first accommodating part via a third positioning pin.

[0011] According to a preferred embodiment, the system further includes a through-beam sensor for detecting whether the fuel injection pipe is in position, the through-beam sensor being disposed on one side of the lifting mechanism.

[0012] According to a preferred embodiment, the device further includes a pressure sensor disposed between the lifting end of the lifting mechanism and the conforming pressure block.

[0013] A method for using a plastic fuel injector press-welding fixture, wherein the fuel injector includes a first fuel injector body and a second fuel injector body connected together, specifically including the following steps: Step S100: Install several first receiving parts onto the top of the mounting plate using elastic members, and install the second receiving plate below the mounting plate using locking members; Step S200: Place the first oil pipe body of the oil injection pipe to be welded on the first contour groove and cause the second oil pipe body to be placed on the second contour groove. Step S300: Connect the secondary pressure component to the adjacent first accommodating body through the third positioning pin, and position the front end of the second oil pipe body through the air nozzle positioning pin. Step S400: Align the top cover of the oil pipe with the first oil pipe body on the first contour groove, and use the horizontal moving mechanism to move the first receiving body to directly below the contour pressing block; use the lifting mechanism to make the contour pressing block press the top cover of the oil pipe with the first oil pipe body. Among them, several first positioning pins on the top of the first receiving plate are engaged with several positioning holes corresponding to the bottom of the contouring block; several second positioning pins on the top of the secondary positioning component are engaged with several positioning holes corresponding to the bottom of the contouring block. In step S500, the horizontal displacement of the positioning shaft is adjusted by the positioning moving mechanism, and the positioning shaft is driven by the positioning telescopic mechanism to press and position the end of the oil pipe cover on the pressure groove. The connection between the oil pipe cover and the first oil pipe body is welded by the laser equipment through the welding groove.

[0014] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: This invention can accurately position and reliably clamp fuel injection pipes, and meet the flatness requirements of fuel injection pipe products. It is compatible with automated production lines and various processing procedures, is easy to operate, and significantly improves the processing quality and production efficiency of automotive fuel injection pipes.

[0015] The product housing mechanism is equipped with a first housing plate and a second housing plate, which can clamp and fix the two sections of the fuel injection pipe one by one. In addition, the secondary positioning mechanism and positioning components further accurately position the fuel injection pipe to avoid problems such as welding misalignment and side hole machining deviation caused by positioning offset, thus meeting the high-precision assembly and welding processing of the fuel injection pipe. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a plastic fuel injection pipe press-welding fixture provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the product housing mechanism provided in an embodiment of the present invention; Figure 3 A schematic cross-sectional view of the product housing mechanism provided in an embodiment of the present invention; Figure 4 This is another cross-sectional structural diagram of the product housing mechanism provided in an embodiment of the present invention.

[0018] Icons: 1. Contouring pressure block; 2. Lifting mechanism; 3. First receiving plate; 31. First receiving component; 4. First contouring groove; 5. Second receiving plate; 6. Second contouring groove; 7. Positioning shaft; 8. Positioning telescopic mechanism; 9. Positioning moving mechanism; 10. First guide post; 11. First guide hole; 12. First positioning pin; 13. Positioning groove; 14. Secondary pressing component; 15. Secondary positioning component; 16. Pressure sensor; 17. Through-beam sensor; 18. Horizontal moving mechanism; 19. Guide rail; 20. Second positioning pin; 21. Third positioning pin; 22. Air nozzle positioning pin; 23. Elastic component; 24. Mounting plate; 25. Limit pin; 26. Adjusting component. Detailed Implementation

[0019] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 this invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Example

[0022] Reference Figures 1 to 4A plastic fuel injection pipe pressing and welding fixture includes: a feeding assembly, including a product accommodating mechanism and a horizontal moving mechanism 18. The product accommodating mechanism includes a first accommodating plate 3 and a second accommodating plate 5. The first accommodating plate 3 is provided with a first contouring groove 4 for placing a first fuel injection pipe body; the second accommodating plate 5 is provided with a second contouring groove 6 for accommodating a second fuel injection pipe body; the front end of the first contouring groove 4 is provided with a secondary positioning mechanism for fixing the second fuel injection pipe body on the second contouring groove 6. The pressing assembly includes a contouring pressing block 1 and a lifting mechanism 2; the contouring pressing block 1 is provided with a welding groove, and the lifting mechanism 2 causes the contouring pressing block 1 to move up and down to cover the oil pipe cover with the first oil pipe body. The positioning assembly includes a positioning shaft 7, a positioning telescopic mechanism 8 that causes the positioning shaft 7 to move up and down, and a positioning moving mechanism 9 that causes the positioning shaft 7 to move horizontally. The positioning moving mechanism 9 is located above the contouring block 1. The positioning shaft 7 can pass through the contouring block 1 in sequence and fill the end hole of the first oil pipe body.

[0023] Optionally, the first receiving plate 3 includes several first receiving parts 31, each receiving part 31 is provided with a first receiving groove, and several first receiving grooves are connected to form a first contouring groove 4, which is adapted to the shape and size of the first oil pipe body.

[0024] Optionally, several first receiving parts 31 are all mounted on the mounting plate 24 via elastic members 23, and the moving end of the horizontal moving mechanism 18 is connected to the mounting plate 24. The mounting plate 24 is provided with a number of first guide posts 10, and the first receiving body 31 is provided with a first guide hole 11.

[0025] Optionally, each of the first accommodating parts 31 is detachably fixed to the mounting plate 24 via an adjustable height adjustment member 26.

[0026] Optionally, the first receiving plate 3 and the second receiving plate 5 are respectively disposed on the upper and lower sides of the mounting plate 24, and the front end of the first contour groove 4 is provided with a slot, which vertically penetrates the mounting plate 24 and is located at the end of the second contour groove 6. The secondary positioning mechanism includes a secondary pressing component 14 and a secondary positioning component 15; The secondary pressing component 14 is set at the slot, the secondary positioning component 15 is set above the front end of the second contour groove 6, and the bottom of the secondary positioning component 15 is provided with an air nozzle positioning pin 22.

[0027] Optionally, the first receiving plate 3 is provided with a plurality of positioning grooves 13, which are located on the outside of the first contour groove 4 and communicate with each other; the positioning groove 13 is provided with a limiting pin 25 for limiting the first oil pipe body. The first receiving plate 3 is provided with a first positioning pin 12, and the bottom of the contour pressing block 1 is provided with a corresponding positioning hole.

[0028] Optionally, the slot is set as an arc to fit the outer wall of the end of the second oil pipe body; The side of the secondary pressing component 14 facing the slot is set with an arc; The top of the secondary pressing component 14 is provided with a second positioning pin 20 that matches the shape and size of the positioning hole; One end of the secondary pressing component 14 is connected to the adjacent first accommodating component 31 via the third positioning pin 21.

[0029] Optionally, it also includes a through-beam sensor 17 for detecting whether the fuel injection pipe is in place, the through-beam sensor 17 being disposed on one side of the lifting mechanism 2.

[0030] Optionally, it also includes a pressure sensor 16, which is disposed between the lifting end of the lifting mechanism 2 and the contour block 1.

[0031] A method for using a plastic fuel injector press-welding fixture, wherein the fuel injector includes a first fuel injector body and a second fuel injector body connected together, specifically including the following steps: In step S100, several first receiving parts 31 are installed on the top of the mounting plate 24 by means of elastic members 23, and the second receiving plate 5 is installed below the mounting plate 24 by means of locking members. Step S200: Place the first oil pipe body of the oil injection pipe to be welded on the first contour groove 4 and cause the second oil pipe body to be placed on the second contour groove 6. In step S300, the secondary pressure component 14 is connected to the adjacent first accommodating body 31 via the third positioning pin 21, and the secondary positioning component 15 is positioned at the front end of the second oil pipe body via the air nozzle positioning pin 22. Step S400: Align the top cover of the oil pipe with the first oil pipe body on the first contouring groove 4, and use the horizontal moving mechanism 18 to move the first receiving body to directly below the contouring pressure block 1; use the lifting mechanism 2 to make the contouring pressure block 1 press the top cover of the oil pipe with the first oil pipe body. Among them, several first positioning pins 12 on the top of the first receiving plate 3 are inserted into several positioning holes corresponding to the bottom of the contouring block 1; several second positioning pins 20 on the top of the secondary positioning component 15 are inserted into several positioning holes corresponding to the bottom of the contouring block 1. In step S500, the horizontal displacement of the positioning shaft 7 is adjusted by the positioning moving mechanism 9, and the positioning shaft 7 is pressed and positioned on the end of the oil pipe cover on the pressure groove by the positioning telescopic mechanism 8. The connection between the oil pipe cover and the first oil pipe body is welded by the laser equipment through the welding groove.

[0032] Optionally, a guide rail 19 is provided on one side of the horizontal moving mechanism 18, and the bottom of the mounting plate 24 slides in cooperation with the guide rail 19.

[0033] The second positioning pin 20 of the secondary pressing component 14 and the first positioning pins 12 on the multiple first accommodating parts 31 can be inserted into the positioning holes on the contour pressing block 1. Furthermore, the second positioning pin 20 on the second pressing component and the first positioning pins 12 on the first accommodating parts 31 are at the same level to ensure that the first accommodating parts 31 and the second pressing component are in contact with the lower end face of the contour pressing block 1. The first accommodating part 31, which is detachably connected to the secondary pressing component 14, is provided with a stepped mounting position and a slot (opening). The secondary pressing component 14 is set in the mounting position so that the top of the secondary pressing component 14 is at the same height as the top of the other accommodating parts. The opening can be closed and locked by the secondary pressing component 14, thereby limiting the end of the second oil pipe body located inside the opening. In this embodiment, the second oil pipe body is located in the second contouring groove 6, and its end extends vertically upward and is connected to the front end of the first oil pipe body. That is, the second oil pipe body is a curved and L-shaped tubular structure, and the first oil pipe body is a curved tubular structure.

[0034] The groove is designed in an arc shape to facilitate fitting the outer wall of the second oil pipe body. An air nozzle positioning pin 22 is provided to limit and fix the front end of the second oil pipe body.

[0035] In this embodiment, the oil pipe cap is placed on the first oil pipe body, and the oil pipe cap can cover the first oil pipe body. The injection pipe includes a first oil pipe body and a second oil pipe body connected together. The first oil pipe body is accommodated in the first contour groove 4, and the second oil pipe body is accommodated in the second contour groove 6. Specifically, the purpose of this embodiment is to weld the oil pipe cap and the first oil pipe body cap in the injection pipe together to achieve the fixed welding process of the injection pipe.

[0036] In this embodiment, multiple first accommodating parts 31 can be used to fix the fuel injection pipe separately. Each first accommodating part 31 is provided with an elastic element 23 (spring) connected to the mounting plate 24, which can achieve adaptive compensation for the fuel injection pipe and protect the fuel injection pipe from being crushed. In addition, the first accommodating parts 31 are connected to form a first contour groove 4, which can be integrally machined to ensure planar accuracy. When floating elastic compensation is not required, it can be directly installed on the mounting plate 24 to fix the first fuel pipe body as a whole.

[0037] Furthermore, when it is necessary to adjust the height of the first contouring groove 4 or part of the first receiving segment 31, the first receiving segment 31 can be detachably connected to the top of the mounting plate 24 via adjusting components 26 (such as bolts, steel sheets, shims, etc.). The height of one or more first receiving segments 31 can be adjusted to meet the flatness requirements of the first oil pipe body. Each first receiving segment 31 has at least one elastic element 23, which can buffer the compression of the contouring block 1 on the first receiving segment 31 and protect the first receiving segment 31. In addition, the positioning moving mechanism 9 can drive the positioning telescopic mechanism 8 to move horizontally. Since the sliding direction of the guide rail 19 is consistent with the moving direction of the positioning moving mechanism 9, the horizontal moving mechanism 18 drives the first receiving plate 3 and the second receiving plate 5 to move along the sliding direction of the guide rail 19. Finally, the first receiving plate 3 is located directly below the contouring block 1, and the positioning telescopic mechanism 8 drives the positioning shaft 7 to move downward and press and position it on the end hole of the oil pipe cover.

[0038] The lifting mechanism 2 drives the contouring block 1 to press down, so that the contouring block 1 squeezes the first receiving plate 3. At the same time, due to the force, the pressure sensor 16 can detect the pressure on the contouring block 1, and thus control the descent height of the contouring block 1 by the lifting mechanism 2 through the pressure data.

[0039] In this embodiment, at least three positioning structures are provided along the outer edge of the first oil pipe body. These positioning structures are adapted to the shape and size of the positioning groove 13 to guide the first oil pipe body to be placed on the first contour groove 4. After the first oil pipe body is accommodated in the first contour groove 4, the positioning structure is fixed in the contour groove by the limiting pin 25 to prevent the first oil pipe body from shifting within the first contour groove 4. The two sections of the fuel injection pipe are the first oil pipe body and the second oil pipe body, respectively.

[0040] In this embodiment, the pressing method of the contoured pressure block 1 on the oil pipe cover and the first oil pipe body is a snap-fit ​​pressing method. The size of the weld groove is smaller than the size of the oil pipe cover. The laser equipment emits a laser beam through the weld groove to weld the edge of the oil pipe cover, i.e., the weld bead. In this embodiment, the multiple first receiving grooves can be set according to the shape of the first oil pipe body. That is, the multiple first receiving parts 31 can be set according to the shape of the first oil pipe body. Similarly, when the first oil pipe body is horizontal and has a simple shape, the first receiving plate 3 and the first contoured groove 4 can be integrally formed, without the need for multiple first receiving parts 31 to be combined (multiple first receiving grooves form the first contoured groove 4).

[0041] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A plastic fuel injection pipe press-welding fixture, characterized in that, include: The feeding assembly includes a product receiving mechanism and a horizontal moving mechanism. The product receiving mechanism includes a first receiving plate and a second receiving plate. The first receiving plate is provided with a first contouring groove for placing a first oil pipe body. The second receiving plate is provided with a second contouring groove for accommodating a second oil pipe body. A secondary positioning mechanism is provided at the front end of the first contouring groove for fixing the second oil pipe body on the second contouring groove. The pressing assembly includes a contour pressing block and a lifting mechanism; the contour pressing block is provided with a welding groove, and the lifting mechanism causes the contour pressing block to move up and down to cover the oil pipe cover with the first oil pipe body; The positioning assembly includes a positioning shaft, a positioning telescopic mechanism that causes the positioning shaft to move up and down, and a positioning moving mechanism that causes the positioning shaft to move horizontally. The positioning moving mechanism is disposed above the contouring block, and the positioning shaft can pass through the contouring block in sequence and fill the end hole of the first oil pipe body.

2. The plastic fuel injection pipe press-welding fixture according to claim 1, characterized in that, The first receiving plate includes several first receiving parts, each receiving part being provided with a first receiving groove. Several first receiving grooves are connected to form a first contouring groove, which is adapted to the shape and size of the first oil pipe body.

3. The plastic fuel injection pipe press-welding fixture according to claim 2, characterized in that, Several of the first accommodating components are mounted on the mounting plate via elastic elements, and the moving end of the horizontal moving mechanism is connected to the mounting plate; The mounting plate is provided with a plurality of first guide posts, and each of the first receiving parts is provided with a first guide hole.

4. The plastic fuel injection pipe press-welding fixture according to claim 3, characterized in that, Each of the first accommodating components is detachably and fixedly connected to the mounting plate via an adjustable height adjustment component.

5. The plastic fuel injection pipe press-welding fixture according to claim 2, characterized in that, The first receiving plate and the second receiving plate are respectively disposed on the upper and lower sides of the mounting plate. The front end of the first contour groove is provided with a slot, which vertically penetrates the mounting plate and is located at the end of the second contour groove. The secondary positioning mechanism includes a secondary pressing component and a secondary positioning component; The secondary pressing component is disposed at the slot, the secondary positioning component is disposed above the front end of the second contour groove, and the bottom of the secondary positioning component is provided with an air nozzle positioning pin.

6. The plastic fuel injection pipe press-welding fixture according to claim 1, characterized in that, The first receiving plate has a plurality of positioning grooves, which are located outside the first contour groove and communicate with it; the positioning grooves are provided with limiting pins that limit the position of the first oil pipe body. The first receiving plate is provided with a first positioning pin, and the bottom of the contour pressing block is provided with a corresponding positioning hole.

7. The plastic fuel injection pipe press-welding fixture according to claim 5, characterized in that, The slot is arc-shaped to fit the outer wall of the end of the second oil pipe body; The side of the secondary pressing component facing the slot is rounded. The top of the secondary pressing component is provided with a second positioning pin that matches the shape and size of the positioning hole; One end of the secondary pressing component is connected to the adjacent first accommodating part via a third positioning pin.

8. The plastic fuel injection pipe press-welding fixture according to claim 4, characterized in that, It also includes a through-beam sensor for detecting whether the fuel injection pipe is in place, the through-beam sensor being disposed on one side of the lifting mechanism.

9. The plastic fuel injection pipe press-welding fixture according to claim 1, characterized in that, It also includes a pressure sensor, which is disposed between the lifting end of the lifting mechanism and the contouring pressure block.

10. A method of using a plastic fuel injector press-welding fixture, comprising the plastic fuel injector press-welding fixture as described in any one of claims 1 to 9, wherein the fuel injector includes a first fuel pipe body and a second fuel pipe body connected together, characterized in that... Specifically, the following steps are included: Step S100: Install several first receiving parts onto the top of the mounting plate using elastic members, and install the second receiving plate below the mounting plate using locking members; Step S200: Place the first oil pipe body of the oil injection pipe to be welded on the first contour groove and cause the second oil pipe body to be placed on the second contour groove. Step S300: Connect the secondary pressure component to the adjacent first accommodating body through the third positioning pin, and position the front end of the second oil pipe body through the air nozzle positioning pin. Step S400: Align the top cover of the oil pipe with the first oil pipe body on the first contour groove, and use the horizontal moving mechanism to move the first receiving body to directly below the contour pressing block; use the lifting mechanism to make the contour pressing block press the top cover of the oil pipe with the first oil pipe body. Among them, several first positioning pins on the top of the first receiving plate are engaged with several positioning holes corresponding to the bottom of the contouring block; several second positioning pins on the top of the secondary positioning component are engaged with several positioning holes corresponding to the bottom of the contouring block. In step S500, the horizontal displacement of the positioning shaft is adjusted by the positioning moving mechanism, and the positioning shaft is driven by the positioning telescopic mechanism to press and position the end of the oil pipe cover on the pressure groove. The connection between the oil pipe cover and the first oil pipe body is welded by the laser equipment through the welding groove.

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