A mudguard pipe fitting straightening fixture

Abstract

This invention discloses a mudguard pipe fitting alignment fixture, comprising a mudguard pipe fitting to be aligned and a worktable. First and second clamping components are respectively installed on both sides of the worktable, clamping the base and the free end of a straight pipe section, respectively. First and second lateral movement components are also installed on the worktable, driving the first and second clamping components to move laterally along the length of the worktable. A heating coil is located in the middle of the worktable. The first clamping component clamps the base and moves laterally towards the heating coil, causing the straight pipe section to pass through the heating coil. After the heating coil heats the junction of the straight and curved pipe sections at high temperature, the second clamping component moves laterally towards the heating coil and clamps the free end of the straight pipe section, aligning the straight pipe section perpendicular to the base. This invention can align a straight pipe section perpendicular to the base, thereby ensuring product quality and performance.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, specifically a mudguard tube alignment tool. Background Technology

[0002] Mudguard tubing is a common automotive component. Several mudguard tubing units are combined to form a mudguard beam or frame, which serves both to support the mudguard and to meet vehicle weight reduction requirements. Typically, to provide clearance, ensure support, and adapt to the mudguard structure, a relatively straight tubing is bent using a tube bending machine. The resulting mudguard tubing looks like this... Figure 1 and 2 As shown, it mainly includes a base 101 and a tube body, wherein the tube body includes a tube head section 102, a bend section 103 and a straight section 104 that are integrally connected in sequence, and the diameter of the tube body is approximately 50mm.

[0003] In the actual bending process, due to unavoidable bending errors and the limitations of the clamping end size of the pipe bending machine, the straight pipe section 104 of the mudguard pipe fitting obtained after bending will have an upward, downward, left or right vertical deviation relative to the base 101 (reference plane). This vertical deviation range often reaches 8-10mm, which exceeds the error range of 3-5mm vertical deviation.

[0004] Therefore, for mudguard pipe fittings obtained by bending, it is necessary to design a correction tool to correct the straight pipe section 104 to be perpendicular to the base 101, that is, to reduce the perpendicularity deviation range of the straight pipe section 104 relative to the base 101 from the original 8-10mm to 3-5mm. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a mudguard pipe fitting correction fixture that can correct the straight pipe section to be perpendicular to the base, so as to ensure product quality and performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mudguard pipe fitting straightening fixture includes a mudguard pipe fitting to be straightened and a worktable. The mudguard pipe fitting includes a base and a pipe body. The pipe body includes a pipe head section, a bend section, and a straight section that are integrally connected in sequence. The fixture is characterized in that: a first clamping component and a second clamping component are respectively installed on both sides of the worktable, and the first clamping component and the second clamping component are respectively used to clamp the free ends of the base and the straight section. A first lateral movement component and a second lateral movement component are installed on the worktable, and the first lateral movement component and the second lateral movement component are respectively used to drive the first clamping component and the second clamping component to move laterally along the length direction of the worktable.

[0008] A heating coil is provided in the middle of the workbench. The first clamping component clamps the base and moves laterally toward the heating coil, causing the straight pipe section to pass through the heating coil. After the heating coil heats the joint between the straight pipe section and the bent pipe section at high temperature, the second clamping component moves laterally toward the heating coil and clamps the free end of the straight pipe section, correcting the straight pipe section to be perpendicular to the base.

[0009] Furthermore, the first clamping component includes a first L-shaped base, a positioning element, and a first clamping element. The positioning element includes two positioning pins fixedly connected to the front of the vertical portion of the first L-shaped base, which are respectively inserted into the mounting holes on both sides of the base. The first clamping element includes two rotary cylinders fixedly installed on the vertical portion of the first L-shaped base. The two rotary cylinders are respectively located outside the two positioning pins, and the piston rod of each rotary cylinder is fixedly connected to a clamping block. The two rotary cylinders rotate in opposite directions, and the two clamping blocks respectively clamp the base from both sides and lock the base to the front of the vertical portion of the first L-shaped base.

[0010] Furthermore, there are at least four positioning elements and four first clamping elements, which are distributed at intervals on the same circumference.

[0011] Furthermore, the first lateral movement component includes two first guide rails and a lateral movement cylinder. The two first guide rails are fixedly connected to one side of the worktable surface along the length of the worktable. The lateral portion of the first L-shaped base is slidably mounted on the two first guide rails. The lateral movement cylinder is fixedly mounted on one side edge of the worktable surface, and the end of the piston rod of the lateral movement cylinder is fixedly connected to the bottom of the lateral portion of the first L-shaped base. The piston rod of the lateral movement cylinder extends and retracts, driving the first L-shaped base to move laterally along the two first guide rails.

[0012] Furthermore, the heat source of the heating coil is a medium-frequency heating furnace, a relay is installed in the power supply circuit of the medium-frequency heating furnace, a first limit switch is installed on one side of the front end of a first guide rail on the workbench, used to detect the positioning signal of the first L-shaped base moving laterally toward the heating coil, and a solenoid valve is installed in the air circuit of the lateral movement cylinder.

[0013] Furthermore, the second clamping component includes a second L-shaped base and a second clamping member. The second clamping member includes a four-jaw chuck fixedly connected to the front of the vertical portion of the second L-shaped base. A motor is installed on the back of the vertical portion of the second L-shaped base to drive the jaws of the four-jaw chuck to retract and open radially.

[0014] Furthermore, the second lateral movement component includes two second guide rails, two fixed seats, and a lead screw. The two second guide rails and two fixed seats are respectively fixedly connected to the other side of the worktable surface along the length direction of the worktable, and the two fixed seats are located between the two second guide rails. The lead screw is rotatably installed between the two fixed seats. The lateral portion of the second L-shaped base is slidably installed on the two second guide rails on one hand and threadedly installed on the lead screw on the other hand. One end of the lead screw extends from the corresponding fixed seat and is fixedly connected to a handwheel. Rotating the handwheel causes the second L-shaped base to move laterally along the two second guide rails.

[0015] Furthermore, a second limit switch is installed on one side of the front end of a second guide rail on the workbench for detecting the positioning signal of the second L-shaped base moving laterally toward the heating coil; it also includes a controller, which is electrically connected to the first limit switch and the second limit switch respectively, and electrically connected to the relay, the solenoid valve and the motor respectively.

[0016] Furthermore, the vertical portion of the first L-shaped base is parallel to the vertical portion of the second L-shaped base, and both are perpendicular to the table surface of the workbench; the heating coil is coaxially arranged with the four-jaw chuck.

[0017] Furthermore, the inner diameter of the heating coil is larger than the diameter of the straight pipe section, and the diameter of the four-jaw chuck is much larger than the diameter of the straight pipe section.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention employs first and second clamping components that can move laterally along the worktable, respectively used to clamp the base and the free end of the straight pipe section. The first and second lateral moving components drive the first and second clamping components to move laterally, and a heating coil is set in the middle of the worktable. In use, the first clamping component clamps the base and moves laterally toward the heating coil, so that the straight pipe section passes through the heating coil. After the heating coil heats the joint between the straight pipe section and the curved pipe section at high temperature, the second clamping component moves laterally toward the heating coil and clamps the free end of the straight pipe section, thereby correcting the straight pipe section to be perpendicular to the base. This reduces the perpendicularity deviation of the straight pipe section relative to the base from the original 8-10mm to 3-5mm, thus ensuring product quality and performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the mudguard pipe fitting to be corrected in this invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of the mudguard pipe fitting to be corrected in this invention. Figure 2 .

[0022] Figure 3 This is the main structural view of the present invention.

[0023] Figure 4 This is a top view of the structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the first clamping component in this invention.

[0025] Figure 6 This is a schematic diagram of the structure of the second clamping component in this invention.

[0026] Figure 7 This is a block diagram illustrating the electrical control principle of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See Figure 1-7A mudguard pipe fitting straightening fixture includes a mudguard pipe fitting 1 to be straightened and a workbench 2. The mudguard pipe fitting 1 includes a base 101 and a pipe body. The pipe body includes a pipe head section 102, a bend section 103 and a straight section 104 connected in sequence. A first clamping component 4 and a second clamping component 5 are respectively installed on both sides of the workbench 2. The first clamping component 4 and the second clamping component 5 are respectively applied to clamp the free ends of the base 101 and the straight section 104. A first lateral movement component 6 and a second lateral movement component 7 are installed on the workbench 2. The first lateral movement component 6 and the second lateral movement component 7 are respectively applied to drive the first clamping component 4 and the second clamping component 5 to move laterally along the length direction of the workbench 2.

[0029] A heating coil 8 is provided in the middle of the workbench 2. The first clamping component 4 clamps the base 101 and moves laterally toward the heating coil 8, causing the straight pipe section 104 to pass through the heating coil 8. After the heating coil 8 heats the joint between the straight pipe section 104 and the bent pipe section 103 at high temperature, the second clamping component 5 moves laterally toward the heating coil 8 and clamps the free end of the straight pipe section 104, correcting the straight pipe section 104 to be perpendicular to the base 101, thereby reducing the perpendicularity deviation range of the straight pipe section 104 relative to the base 101 from the original 8-10mm to 3-5mm.

[0030] In this invention, the first clamping component 4 includes a first L-shaped base 41, a positioning component, and a first clamping component. The positioning component includes two positioning pins 42 fixedly connected to the front of the vertical portion of the first L-shaped base 41, which are respectively inserted into the mounting holes 105 on both sides of the base 101. The first clamping component includes two rotating cylinders 43 fixedly installed on the vertical portion of the first L-shaped base 41. The two rotating cylinders 43 are respectively located on the outside of the two positioning pins 42, and the end of the piston rod of each rotating cylinder is fixedly connected to a clamping block 44. The two rotating cylinders 43 can rotate within a range of 90°.

[0031] In the initial state, the clamping blocks 44 at the ends of the two rotating cylinders 43 are in a vertical state. After the two rotating cylinders 43 rotate towards each other, the two clamping blocks 44 clamp the base 101 from both sides respectively, and lock the base 101 to the front of the vertical part of the first L-shaped base 41, thereby holding the base 101.

[0032] In this invention, there are at least four positioning members and four first clamping members, which are distributed at intervals on the same circumference.

[0033] Specifically, on the same circumference, there is one positioning element and one first clamping element distributed at the top, bottom, left, and right. When the pipe segment 104 has an upward vertical deviation relative to the base 101 (reference plane), that is, when the straight pipe segment 104 shifts upward relative to the base 101, the mudguard pipe segment 1 to be corrected can be positioned and clamped by the positioning element and the first clamping element located on the lower side. When the pipe segment 104 has a leftward vertical deviation relative to the base 101 (reference plane), that is, when the straight pipe segment 104 shifts to the left relative to the base 101, the mudguard pipe segment 1 to be corrected can be positioned and clamped by the positioning element and the first clamping element located on the right side. The same applies to other cases. Thus, when the first clamping element 4 clamps the base 101 and moves it laterally towards the heating coil 8, it ensures that the straight pipe segment 104 can pass through the heating coil 8 normally.

[0034] In this invention, the first transverse component 6 includes two first guide rails 61 and a transverse cylinder 62. The two first guide rails 61 are fixedly connected to one side of the worktable 2 along the length of the worktable 2. The transverse portion of the first L-shaped base 41 is slidably mounted on the two first guide rails 61. The transverse cylinder 62 is fixedly mounted on one side edge of the worktable 2. The end of the piston rod of the transverse cylinder 62 is fixedly connected to the bottom of the transverse portion of the first L-shaped base 41.

[0035] Thus, by extending and retracting the piston rod of the transverse cylinder 62, the first L-shaped base 41 is driven to move back and forth along the two first guide rails 61.

[0036] In this invention, the heat source of the heating coil 8 is a medium-frequency heating furnace 9. A relay 10 is installed in the power supply circuit of the medium-frequency heating furnace 9. A first limit switch 11 is installed on one side of the front end of a first guide rail on the workbench 2 to detect the position signal of the first L-shaped base 41 moving laterally towards the heating coil 8. A solenoid valve 12 is installed in the air circuit of the lateral movement cylinder 62.

[0037] In this invention, the second clamping component 5 includes a second L-shaped base 51 and a second clamping member. The second clamping member includes a four-jaw chuck 52 fixedly connected to the front of the vertical portion of the second L-shaped base 51. A motor 53 is installed on the back of the vertical portion of the second L-shaped base 51 to drive the jaws of the four-jaw chuck 52 to retract and open radially. The motor 53 can rotate in both directions.

[0038] It should be noted that, based on existing technology, the four-jaw chuck 52 is driven by a small bevel gear (not shown in the figure) driving a large bevel gear (not shown in the figure). The large bevel gear has an Archimedean spiral groove (not shown in the figure) on its back, which meshes with the jaws. The motor 53 is connected to the small bevel gear for transmission. By rotating the motor 53 in both directions, the small bevel gear is driven to rotate in both directions, which in turn drives the jaws of the four-jaw chuck 52 to retract and open radially, thereby clamping and releasing the free end of the straight pipe section 104.

[0039] In the initial state, the jaws of the four-jaw chuck 52 open radially. After the motor 53 rotates forward, the jaws of the four-jaw chuck 52 close radially to clamp the free end of the straight pipe section 104.

[0040] In this invention, the second transverse component 7 includes two second guide rails 71, two fixed seats 72, and a lead screw 73. The two second guide rails 71 and the two fixed seats 72 are respectively fixedly connected to the other side of the worktable 2 along the length direction of the worktable 2, and the two fixed seats 72 are located between the two second guide rails 71. The lead screw 73 is rotatably installed between the two fixed seats 72. The transverse part of the second L-shaped base 51 is installed on the two second guide rails 71 by sliding fit on one side and on the lead screw 73 by threaded fit on the other side. One end of the lead screw 73 extends from the corresponding fixed seat and is fixedly connected to a handwheel 74.

[0041] Therefore, by holding the handwheel 74 and rotating the handwheel 74 forward and backward, the lead screw 73 is driven to rotate forward and backward, so that the second L-shaped base 51 moves back and forth along the two second guide rails 71 and the lead screw 73.

[0042] In this invention, a second limit switch 13 is installed on one side of the front end of a second guide rail on the workbench 2 to detect the arrival signal of the second L-shaped base 51 moving laterally toward the heating coil 8; it also includes a controller 3, which is electrically connected to the first limit switch 11 and the second limit switch 13, and to the relay 10, the solenoid valve 12, and the motor 53, respectively. Thus, the controller 3 automatically controls the operation of the lateral movement cylinder 62 and the motor 53.

[0043] It should be noted that the workbench 2 should also be equipped with two push-button switches (not shown in the figure) for manually controlling the transverse cylinder 62 and the two rotary cylinders 43, respectively, so as to realize the manual control of the transverse cylinder 62, the two rotary cylinders 43 and the motor 53.

[0044] In this invention, the vertical portion of the first L-shaped base 41 is parallel to the vertical portion of the second L-shaped base 51, and both are perpendicular to the table surface of the workbench 2; the heating coil 8 is coaxially arranged with the four-jaw chuck 52.

[0045] Therefore, by means of the above limitations, at the instant when the jaws of the four-jaw chuck 52 converge radially and clamp the free end of the straight pipe section 104, the straight pipe section 104 can be aligned to be perpendicular to the base 101.

[0046] In this invention, the inner diameter of the heating coil 8 is larger than the diameter of the straight pipe section 104, and the diameter of the four-jaw chuck 52 is much larger than the diameter of the straight pipe section 104.

[0047] Specifically, the inner diameter of the heating coil 8 should be slightly larger than the diameter of the straight pipe section 104 (50mm) to ensure that the straight pipe section 104 can pass through the heating coil 8 normally; the diameter of the four-jaw chuck 52 is 250mm, which is 5 times the diameter of the straight pipe section 104 (50mm). In this way, no matter whether the straight pipe section 104 is offset upward, downward, left or right relative to the base 101, the jaws of the four-jaw chuck 52 can hold the free end of the straight pipe section 104 when they retract radially.

[0048] The present invention will be further described below with reference to the accompanying drawings:

[0049] In the initial state, on the one hand, the piston rod of the transverse cylinder 62 is in a naturally retracted state, and the first L-shaped base 41 is located at the end of the two first guide rails 61 away from the heating coil 8 (the leftmost end); on the other hand, the second L-shaped base 51 is located at the end of the two first guide rails 71 away from the heating coil 8 (the rightmost end); and on the other hand, the jaws of the four-jaw chuck 52 open radially.

[0050] The following describes the case where straight pipe segment 104 is offset to the left (see...). Figure 2 , 4 Taking an example, the method of using this invention will be specifically described as follows:

[0051] In use, depending on the leftward offset of the straight pipe section 104 relative to the base 101, select the positioning component and the first clamping component located on the right side, and then fit the base 101 onto the two positioning pins 42 through the mounting holes 105 on both sides. Next, press the button switch that controls the operation of the two rotating cylinders 43, so that the two rotating cylinders 43 rotate in opposite directions, and the two clamping blocks 44 clamp the base 101 from both sides respectively, and lock the base 101 to the front of the vertical part of the first L-shaped base 41, thus holding the base 101.

[0052] Then, press the button switch that controls the operation of the transverse cylinder 62, causing the piston rod of the transverse cylinder 62 to extend and drive the first L-shaped base 41 to move laterally (to the right) along the two first guide rails 61 toward the heating coil 8.

[0053] When the first limit switch 11 detects the arrival signal of the first L-shaped base 41, it feeds back to the controller 3. The controller 3 sends a control command to the solenoid valve 12, and the transverse cylinder 62 stops working. At this time, the joint of the straight pipe section 104 and the bent pipe section 103 is located in the heating coil 8. On the other hand, it sends a control command to the relay 10 and starts the first time delay. The relay 10 closes, the power supply circuit of the medium frequency heating furnace 9 is turned on, and the furnace starts working, so that the heating coil 8 heats the joint of the straight pipe section 104 and the bent pipe section 103.

[0054] When the heating coil 8 heats the joint between the straight pipe section 104 and the bent pipe section 103 to about 800°C, the first time delay is completed. The controller 3 sends a control command to the relay 10, the relay 10 is disconnected, the medium frequency heating furnace 9 stops working, and the heating coil 8 stops heating.

[0055] Then, hold the handwheel 74 and rotate it clockwise to drive the lead screw 73 to rotate clockwise, so that the second L-shaped base 51 moves laterally (leftward) towards the heating coil 8 along the two second guide rails 71 and the lead screw 73. When the second limit switch 13 detects the arrival signal of the second L-shaped base 51, it feeds back to the controller 3. The controller 3 sends a control signal to the motor 53 and starts the second time delay. The motor 53 rotates clockwise, driving the jaws of the four-jaw chuck 52 to retract radially and clamp the free end of the straight pipe section 104. At this time, the jaws of the four-jaw chuck 52 will "straighten" the straight pipe section 104 that has a vertical deviation relative to the base 101, that is, correct the straight pipe section 104 to be perpendicular to the base 101, thereby reducing the vertical deviation range of the straight pipe section 104 relative to the base 101 from the original 8-10mm to 3-5mm.

[0056] When the second time delay is completed, the calibration ends, and the controller 3 sends a control signal to the motor 53 again. The motor 53 reverses and drives the jaws of the four-jaw chuck 52 to open radially, releasing the free end of the straight pipe section 104.

[0057] Next, press the button switch to control the operation of the transverse cylinder 62 again, causing the piston rod of the transverse cylinder 62 to retract, driving the first L-shaped base 41 to move laterally (leftward) along the two first guide rails 61 to the initial position, and causing the straight pipe section 104 to pass through the heating coil 8 in the opposite direction.

[0058] Then, press the button switch that controls the operation of the two rotating cylinders 43 again, so that the two rotating cylinders 43 rotate in opposite directions, driving the two clamping blocks 44 back to the vertical position, releasing the locking of the base 101, and then removing the corrected mudguard pipe 1.

[0059] It should be noted that the terms "forward rotation" and "reverse rotation" mentioned above are relative and are used to distinguish the direction of rotation.

[0060] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0061] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A mudguard pipe fitting alignment fixture, comprising a mudguard pipe fitting to be aligned and a worktable, wherein the mudguard pipe fitting includes a base and a pipe body, and the pipe body includes a pipe head section, a bend section, and a straight section integrally connected in sequence, characterized in that: A first clamping component and a second clamping component are respectively installed on both sides of the workbench. The first clamping component and the second clamping component are respectively used to clamp the base and the free end of the straight pipe section. A first lateral movement component and a second lateral movement component are installed on the workbench. The first lateral movement component and the second lateral movement component are respectively used to drive the first clamping component and the second clamping component to move laterally along the length direction of the workbench. A heating coil is provided in the middle of the workbench. The first clamping component clamps the base and moves laterally toward the heating coil, causing the straight pipe section to pass through the heating coil. After the heating coil heats the joint between the straight pipe section and the bent pipe section at high temperature, the second clamping component moves laterally toward the heating coil and clamps the free end of the straight pipe section, correcting the straight pipe section to be perpendicular to the base. The first clamping component includes a first L-shaped base, a positioning component, and a first clamping component. The positioning component includes two positioning pins fixedly connected to the front of the vertical portion of the first L-shaped base, which are respectively inserted into the mounting holes on both sides of the base. The first clamping component includes two rotary cylinders fixedly installed on the vertical portion of the first L-shaped base. The two rotary cylinders are respectively located outside the two positioning pins, and the piston rod of each rotary cylinder is fixedly connected to a clamping block. The two rotary cylinders rotate in opposite directions, and the two clamping blocks respectively clamp the base from both sides and lock the base to the front of the vertical portion of the first L-shaped base. The first lateral movement component includes two first guide rails and a lateral movement cylinder. The two first guide rails are fixedly connected to one side of the worktable surface along the length of the worktable. The lateral portion of the first L-shaped base is slidably mounted on the two first guide rails. The lateral movement cylinder is fixedly mounted on one side edge of the worktable surface, and the end of the piston rod of the lateral movement cylinder is fixedly connected to the bottom of the lateral portion of the first L-shaped base. The piston rod of the lateral movement cylinder extends and retracts, driving the first L-shaped base to move laterally along the two first guide rails. The heat source of the heating coil is a medium-frequency heating furnace. A relay is installed in the power supply circuit of the medium-frequency heating furnace. A first limit switch is installed on one side of the front end of a first guide rail on the workbench to detect the positioning signal of the first L-shaped base moving laterally toward the heating coil. A solenoid valve is installed in the air circuit of the lateral movement cylinder. The second clamping component includes a second L-shaped base and a second clamping member. The second clamping member includes a four-jaw chuck fixedly connected to the front of the vertical portion of the second L-shaped base. A motor is installed on the back of the vertical portion of the second L-shaped base to drive the jaws of the four-jaw chuck to retract and open radially. The vertical portion of the first L-shaped base is parallel to the vertical portion of the second L-shaped base, and both are perpendicular to the table surface of the workbench; the heating coil is coaxially arranged with the four-jaw chuck.

2. The mudguard pipe fitting alignment fixture according to claim 1, characterized in that: There are at least four positioning elements and four first clamping elements, which are distributed at intervals on the same circumference.

3. The mudguard pipe fitting alignment fixture according to claim 1, characterized in that: The second lateral movement component includes two second guide rails, two fixed seats, and a lead screw. The two second guide rails and two fixed seats are fixedly connected to the other side of the worktable along the length of the worktable, with the two fixed seats located between the two second guide rails. The lead screw is rotatably mounted between the two fixed seats. The lateral portion of the second L-shaped base is slidably mounted on the two second guide rails and threadedly mounted on the lead screw. One end of the lead screw extends from the corresponding fixed seat and is fixedly connected to a handwheel. Rotating the handwheel causes the second L-shaped base to move laterally along the two second guide rails.

4. The mudguard pipe fitting alignment fixture according to claim 1, characterized in that: A second limit switch is installed on one side of the front end of a second guide rail on the workbench to detect the positioning signal of the second L-shaped base moving laterally toward the heating coil; it also includes a controller, which is electrically connected to the first limit switch and the second limit switch respectively, and to the relay, the solenoid valve and the motor respectively.

5. The mudguard pipe fitting alignment fixture according to claim 1, characterized in that: The inner diameter of the heating coil is larger than the diameter of the straight pipe section, and the diameter of the four-jaw chuck is much larger than the diameter of the straight pipe section.

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