Welding positioning tool for electromagnetic valve seat of shock absorber and welding method of welding positioning tool

Through welding positioning tooling and laser welding technology of shock absorber solenoid valve seat, the problem of low welding positioning accuracy of shock absorber solenoid valve seat is solved, high-quality welding effect is achieved, and the sealing and durability of shock absorber are improved.

CN120395210APending Publication Date: 2025-08-01SCHMITTER AUTO STEEL TUBE ANHUI
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Patent Information

Application Number
CN202510668912.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-23
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

In the prior art, the welding of the shock absorber solenoid valve seat has low positioning accuracy and difficulty in controlling heat input, resulting in thermal deformation and air hole defects, affecting sealing and durability.

Method used

A welding positioning tool for shock absorber solenoid valve seat is adopted, combining laser welding and tilt wire feeding technology, and the welding heat input is controlled using positioning tooling and thermal sensors to ensure the accurate positioning of the valve seat and the cylinder and the welding quality.

Benefits of technology

Deformation-free welding of the annular thin-wall valve seat is achieved, the weld is melted evenly, the air hole defects are reduced, the valve body is improved, and the sealing and durability of the CDC shock absorber is significantly improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The welding positioning tool comprises a bottom plate, at least two positioning plates are arranged on the upper surface of the bottom plate side by side along the long edge of the bottom plate, and damping cylinders are arranged on the positioning plates; the stop block is arranged at one end of the upper surface of the bottom plate; the pressing and fixing assembly is arranged on the edge of the upper surface of the bottom plate to press and fix the damping cylinder; the valve seat positioning assembly is arranged on the bottom plate and is perpendicular to the connecting line of the two positioning plates; according to the welding method, the valve seat and the support are conveniently and accurately placed at the preset welding position of the damping cylinder and are pressed and fixed, movement during welding is reduced, the accuracy of the welding position is ensured, through the welding method, deformation-free welding of the annular thin-wall valve seat can be achieved through the positioning tool, the inclined wire feeding technology and the temperature control over the welding position, and the welding efficiency is improved. According to the method, the weld penetration depth is uniform, the air hole defect is reduced, the coaxiality error of the valve body is small, and the sealing performance and durability of the CDC damper in the later period are remarkably improved.
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Description

Technical Field

[0001] The present invention specifically relates to a welding positioning tooling for a shock absorber solenoid valve seat and a welding method thereof. Background Art

[0002] The solenoid valve seat of a CDC shock absorber needs to have high sealing performance and fatigue resistance. Traditional welding methods, such as TIG welding, are prone to cause thermal deformation, affecting the coaxiality of the valve seat; while ordinary laser welding is prone to generate pores due to insufficient penetration depth, affecting the strength. In the prior art, wire-filled laser welding is mostly used for flat welds. However, for the complex structure of an annular thin-walled valve seat, when the valve seat is placed on the shock absorber cylinder, manual placement is prone to shaking, affecting the welding stability. During welding, there are problems such as low positioning accuracy and difficulty in controlling heat input, which also affect the welding firmness. For this reason, we propose a welding positioning tooling for a shock absorber solenoid valve seat and a welding method thereof. Summary of the Invention

[0003] The purpose of the present invention is to provide a welding positioning tooling for a shock absorber solenoid valve seat and a welding method thereof to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A welding positioning tooling for a shock absorber solenoid valve seat, comprising:

[0005] A bottom plate, on the upper surface of which at least two positioning plates are arranged side by side along its long side, and a shock absorber cylinder is arranged on the positioning plate;

[0006] A stop block, arranged at one end of the upper surface of the bottom plate;

[0007] A pressing component, arranged at the edge of the upper surface of the bottom plate to press and fix the shock absorber cylinder;

[0008] A valve seat positioning component, arranged perpendicular to the connection line of the two positioning plates on the bottom plate to press the valve seat at the end of the valve seat positioning component onto the shock absorber cylinder;

[0009] A placing component, arranged at the other end of the upper surface of the bottom plate to press and place onto the shock absorber cylinder.

[0010] Preferably, the placing component includes a fixed frame, a pushing cylinder, a moving seat, a pressing cylinder and a pressing plate. The fixed frame is fixed to the other end of the upper surface of the bottom plate, and a moving seat slidably matched with the bottom plate is arranged on one side of the fixed frame. The pushing cylinder is arranged on the other side of the fixed frame, and one end of the pushing cylinder is matched with the moving seat. The pressing cylinder is fixed on the moving seat, and the pressing plate is arranged at the lower end of the pressing cylinder.

[0011] Preferably, a bracket is placed at the lower end of the pressing plate.

[0012] Preferably, a "V"-shaped positioning groove is formed on the positioning plate.

[0013] Preferably, the positioning plate includes a mounting block, a positioning cylinder, a positioning rod, a connecting plate and a positioning pin. The mounting block is fixed on the bottom plate. The positioning cylinder is arranged on one side of the mounting block, and one end of the positioning cylinder penetrates through the other side of the mounting block to be connected with the connecting plate. The positioning rod is slidably mounted on the upper end inside the mounting block, one end of the positioning rod cooperates with the connecting plate, and the other end is connected with the positioning pin.

[0014] Preferably, a return spring is sleeved on the outer surface of the positioning rod, and both ends of the return spring abut against the connecting plate and the mounting block respectively.

[0015] Preferably, the positioning cylinder and the positioning rod are arranged in parallel.

[0016] Preferably, the pressing and fixing assembly includes a telescopic cylinder and a pressing block. The telescopic cylinder is provided with the pressing block at the top, and the telescopic cylinder and the pressing block form an "L" shape.

[0017] A welding method for a shock absorber solenoid valve seat includes the following steps:

[0018] Step A: Place the shock absorption cylinder on the positioning plate, automatically center the position of the shock absorption cylinder through the "V"-shaped positioning groove, then adjust the valve seat hole on one side of the shock absorption cylinder to correspond to the valve seat positioning component, and the telescopic cylinder drives the pressing block to move down to press and fix the shock absorption cylinder.

[0019] Step B: Place the valve seat on the positioning pin, and the positioning cylinder pulls the positioning rod close to the shock absorption cylinder through the connecting plate, so that one end of the positioning rod sleeved on the valve seat on the positioning pin is pressed against one side of the shock absorption cylinder to make the valve seat correspond to the valve seat hole.

[0020] Step C: Place the bracket under the pressing plate, the pushing cylinder pushes the moving seat to move, and then the pressing cylinder drives the bracket to move close to the shock absorption cylinder through the pressing plate to press the bracket onto the shock absorption cylinder.

[0021] Step D: Start the laser to weld the valve seat and the bracket along the weld seam in turn. When welding the valve seat, the external positioner is connected to the positioning rod to drive the valve seat to rotate. The laser welds the annular weld seam between the valve seat and the bottom plate. Synchronously, the external wire feeding mechanism fills the welding area with welding wire, and protects the welding area with inert gas. Adjust the laser power and the speed of the wire feeding mechanism according to the welding speed.

[0022] Step E: Monitor the temperature of the weld seam through a thermal sensor and control the welding heat input to reduce material deformation.

[0023] Preferably, in step D, the wire feeding direction of the wire feeding mechanism forms an angle of 30°-60° with the laser scanning direction of the laser to perform inclined wire feeding.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The present invention facilitates the accurate placement of the valve seat and the bracket at the predetermined welding position of the shock-absorbing cylinder, presses and fixes them, reduces the movement during welding, ensures the accuracy of the welding position, avoids the misalignment caused by the shaking and movement during manual positioning and pressing, and through the welding method of the present invention, by using the positioning tooling, inclined wire feeding technology and temperature control of the welding area, the deformation-free welding of the annular thin-walled valve seat can be achieved. This method has uniform weld penetration, reduces porosity defects, has a small coaxiality error of the valve body, and significantly improves the sealing performance and durability of the later-stage CDC shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a schematic structural diagram of the placement component of the present invention;

[0028] Figure 3 is a schematic structural diagram of the valve seat positioning component of the present invention;

[0029] Figure 4 is a schematic structural diagram of the positioning plate of the present invention;

[0030] Figure 5 is a schematic structural diagram of the pressing plate of the present invention;

[0031] Figure 6 is a schematic structural diagram of the positioning connection structure between the valve seat and the shock-absorbing cylinder of the present invention;

[0032] Figure 7 is a schematic diagram of the valve seat welded on the shock-absorbing cylinder of the present invention;

[0033] Figure 8 is a microscopic cross-sectional view of the weld seam after the valve seat of the present invention is welded;

[0034] Figure 9 is a schematic diagram of installing an electromagnetic valve on the valve seat of the shock-absorber cylinder.

[0035] In the figure: 1. Bottom plate; 2. Positioning plate; 201. Positioning groove; 3. Pressing and fixing component; 301. Telescopic cylinder; 302. Pressing block; 4. Stopper; 5. Valve seat positioning component; 501. Mounting block; 502. Positioning cylinder; 503. Positioning rod; 504. Connecting plate; 505. Return spring; 506. Positioning pin; 6. Placing component; 601. Fixed frame; 602. Pushing cylinder; 603. Moving seat; 604. Pressing-down cylinder; 605. Pressing plate; 7. Valve seat; 9. Damping cylinder; 10. Bracket. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-9 , the present invention provides a technical solution: a welding positioning tooling for a shock absorber solenoid valve seat, including:

[0038] A bottom plate 1, on the upper surface of the bottom plate 1, at least two positioning plates 2 are arranged side by side along its long side, and a damping cylinder 9 is arranged on the positioning plate 2;

[0039] A stopper 4, arranged at one end of the upper surface of the bottom plate 1;

[0040] It is convenient to position one end of the damping cylinder 9;

[0041] A pressing and fixing component 3, arranged on the edge of the upper surface of the bottom plate 1 to press and fix the damping cylinder 9;

[0042] It is convenient to quickly fix the damping cylinder 9;

[0043] A valve seat positioning component 5, arranged on the bottom plate 1 perpendicular to the connection line of the two positioning plates 2 to press the valve seat 7 at the end of the valve seat positioning component 5 against the damping cylinder 9;

[0044] It is convenient to accurately align the valve seat 7 with the valve seat hole of the damping cylinder 9 so as to weld and fix the valve seat 7 and the damping cylinder 9 later;

[0045] A placing component 6, arranged at the other end of the upper surface of the bottom plate 1 to press and place against the damping cylinder 9;

[0046] It is convenient to press the bracket 10 on the outer wall of the damping cylinder 9 against the surface of the damping cylinder 9 to prevent the bracket 10 from moving and being misaligned during welding.

[0047] Preferably, the placement component 6 includes a fixed frame 601, a pushing cylinder 602, a movable seat 603, a pressing cylinder 604 and a pressing plate 605. The fixed frame 601 is fixed to the other end of the upper surface of the base plate 1, and one side of the fixed frame 601 is provided with a movable seat 603 that slides with the base plate 1. The pushing cylinder 602 is provided on the other side of the fixed frame 601, and one end of the pushing cylinder 602 is matched with the movable seat 603. The pressing cylinder 604 is fixed on the movable seat 603, and a pressing plate 605 is provided at the lower end of the pressing cylinder 604.

[0048] It is convenient to accurately press the bracket 10 onto the outer wall of the shock-absorbing cylinder 9 according to the different lengths and outer diameters of the shock-absorbing cylinder 9 so as to facilitate subsequent welding.

[0049] Preferably, a bracket 10 is placed at the lower end of the pressure plate 605, and the bracket 10 is convenient for positioning when it is assembled into the assembly at a later stage.

[0050] Preferably, a V-shaped positioning groove 201 is provided on the positioning plate 2 to facilitate positioning of shock-absorbing cylinders 9 of different specifications in the middle of the positioning plate 2 .

[0051] Preferably, the positioning plate 2 includes a mounting block 501, a positioning cylinder 502, a positioning rod 503, a connecting plate 504 and a positioning pin 506. The mounting block 501 is fixed on the base plate 1, and the positioning cylinder 502 is arranged on one side of the mounting block 501, and one end of the positioning cylinder 502 passes through the other side of the mounting block 501 to be connected to the connecting plate 504. The positioning rod 503 is slidably installed on the upper end of the inner side of the mounting block 501, and one end of the positioning rod 503 cooperates with the connecting plate 504, and the other end is connected to the positioning pin 506, which is convenient for quickly corresponding to the valve seat hole opened on the outer wall of the shock-absorbing cylinder 9, so that the valve seat 7 is positioned in coordination with the valve seat hole to ensure the accuracy of the valve seat 7 during welding.

[0052] Preferably, a return spring 505 is provided on the outer surface of the positioning rod 503 , and two ends of the return spring 505 are in contact with the connecting plate 504 and the mounting block 501 respectively.

[0053] This facilitates the resetting of the positioning rod 503 .

[0054] Preferably, the positioning cylinder 502 and the positioning rod 503 are arranged in parallel.

[0055] It is convenient to better understand the horizontal sliding movement of the positioning rod 503 pounds.

[0056] Preferably, the pressing assembly 3 includes a telescopic cylinder 301 and a pressing block 302 . The pressing block 302 is provided at the top of the telescopic cylinder 301 , and the telescopic cylinder 301 and the pressing block 302 form an “L” shape.

[0057] This facilitates better pressing and fixing the shock-absorbing cylinder 9 onto the positioning plate 2 .

[0058] A welding method for a shock absorber solenoid valve seat, comprising the following steps:

[0059] Step A: Place the shock-absorbing cylinder 9 on the positioning plate 2, automatically center the position of the shock-absorbing cylinder 9 through the "V"-shaped positioning groove 201, then align the valve seat hole on one side of the shock-absorbing cylinder 9 with the valve seat positioning assembly 5, and the telescopic cylinder 301 drives the pressing block 302 to move downward to press and fix the shock-absorbing cylinder 9;

[0060] Step B: Place the valve seat 7 on the positioning pin 506, and the positioning cylinder 502 pulls the positioning rod 503 close to the shock-absorbing cylinder 9 through the connecting plate 504, so that one end of the positioning rod 503 sleeved on the positioning pin 506 presses the valve seat 7 to one side of the shock-absorbing cylinder 9, making the valve seat 7 correspond to the valve seat hole, facilitating the cooperation between the positioning pin 506 and the valve seat hole to make the coaxiality of the valve seat and the valve seat hole consistent;

[0061] Step C: Place the bracket 10 at the lower end of the pressing plate 605, the pushing cylinder 602 pushes the moving seat 603 to move, and then the pressing cylinder 604 drives the bracket 10 to approach the shock-absorbing cylinder 9 through the pressing plate 605, and presses the bracket 10 onto the shock-absorbing cylinder 9;

[0062] Step D: Start the laser to weld the valve seat 7 and the bracket 10 along the weld seam in turn. When welding the valve seat 7, the external positioner is connected to the positioning rod 503 to drive the valve seat 7 to rotate, and the laser welds the circumferential weld seam between the valve seat 7 and the bottom plate 1. Synchronously, the external wire feeding mechanism fills the welding area with welding wire, facilitating the coordinated control of the robot and the positioner to achieve uniform welding of the circumferential weld seam, and protecting the welding area with inert gas. Adjust the laser power and the speed of the wire feeding mechanism according to the welding speed;

[0063] Step E: Monitor the weld temperature through a thermal sensor and control the welding heat input to reduce material deformation.

[0064] Preferably, in step D, the direction of the welding wire filled by the wire feeding mechanism forms an angle of 30°-60° with the laser scanning direction of the laser to perform inclined wire feeding, which is convenient for improving the fluidity of the molten pool and reducing pores.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding positioning tooling for a shock absorber solenoid valve seat, characterized in that Comprising: A bottom plate (1), on the upper surface of the bottom plate (1), at least two positioning plates (2) are arranged side by side along its long side, and shock-absorbing cylinders (9) are arranged on the positioning plates (2); A stop block (4) is arranged at one end of the upper surface of the bottom plate (1); A pressing and fixing assembly (3) is arranged on the edge of the upper surface of the bottom plate (1) to press and fix the shock-absorbing cylinder (9); A valve seat positioning assembly (5) is arranged on the bottom plate (1) perpendicular to the line connecting the two positioning plates (2) to press the valve seat (7) at the end of the valve seat positioning assembly (5) against the shock-absorbing cylinder (9); A placing assembly (6) is arranged at the other end of the upper surface of the bottom plate (1) to press and place against the shock-absorbing cylinder (9).

2. The welding positioning tooling for a shock absorber solenoid valve seat according to claim 1, characterized in that: The placing assembly (6) includes a fixing frame (601), a pushing cylinder (602), a moving seat (603), a downward pressing cylinder (604) and a pressing plate (605). The fixing frame (601) is fixed to the other end of the upper surface of the bottom plate (1), and a moving seat (603) slidably matched with the bottom plate (1) is arranged on one side of the fixing frame (601). The pushing cylinder (602) is arranged on the other side of the fixing frame (601), and one end of the pushing cylinder (602) is matched with the moving seat (603). The downward pressing cylinder (604) is fixed to the moving seat (603), and a pressing plate (605) is arranged at the lower end of the downward pressing cylinder (604).

3. The welding positioning tooling for a shock absorber solenoid valve seat according to claim 2, characterized in that: A bracket (10) is placed at the lower end of the pressing plate (605).

4. A welding positioning tooling for a shock absorber solenoid valve seat according to claim 1, characterized in that: A "V”-shaped positioning groove (201) is formed on the positioning plate (2).

5. The welding positioning tooling for a shock absorber solenoid valve seat according to claim 1, characterized in that: The positioning plate (2) includes a mounting block (501), a positioning cylinder (502), a positioning rod (503), a connecting plate (504) and a positioning pin (506). The mounting block (501) is fixed to the bottom plate (1). The positioning cylinder (502) is arranged on one side of the mounting block (501), and one end of the positioning cylinder (502) penetrates through the other side of the mounting block (501) to be connected with the connecting plate (504). The positioning rod (503) is slidably installed at the upper end inside the mounting block (501), and one end of the positioning rod (503) is matched with the connecting plate (504), and the other end is connected with the positioning pin (506).

6. A welding positioning tooling for a shock absorber solenoid valve seat according to claim 5, characterized in that: A return spring (505) is sleeved on the outer surface of the positioning rod (503), and both ends of the return spring (505) are respectively abutted against the connecting plate (504) and the mounting block (501).

7. A welding positioning tooling for a shock absorber solenoid valve seat according to claim 5, characterized in that: The positioning cylinder (502) and the positioning rod (503) are arranged in parallel.

8. A welding positioning tooling for a shock absorber solenoid valve seat according to claim 1, characterized in that: The pressing and fixing assembly (3) includes a telescopic cylinder (an end of the telescopic cylinder (301) is provided with a pressing block (302), and the telescopic cylinder (301) and the pressing block (302) form an "L” shape.

9. A welding method for a shock absorber solenoid valve seat, characterized in that, Including the following steps: Step A: Place the shock-absorbing cylinder (9) on the positioning plate (2), automatically center the position of the shock-absorbing cylinder (9) through the "V”-shaped positioning groove (201), then adjust the valve seat hole on one side of the shock-absorbing cylinder (9) to correspond to the valve seat positioning assembly (5), and the telescopic cylinder (301) drives the pressing block (302) to move downwards to press and fix the shock-absorbing cylinder (9); Step B: Place the valve seat (7) on the positioning pin (506). The positioning cylinder (502) pulls the positioning rod (503) close to the shock-absorbing cylinder (9) through the connecting plate (504), so that one end of the positioning rod (503) sleeved on the positioning pin (506) presses the valve seat (7) against one side of the shock-absorbing cylinder (9), making the valve seat (7) correspond to the valve seat hole. Step C: Place the bracket (10) at the lower end of the pressing plate (605). The pushing cylinder (602) pushes the moving seat (603) to move, and then the pressing cylinder (604) drives the bracket (10) close to the shock-absorbing cylinder (9) through the pressing plate (605), pressing the bracket (10) onto the shock-absorbing cylinder (9). Step D: Start the laser to weld the valve seat (7) and the bracket (10) along the weld seam in sequence. When welding the valve seat (7), the external positioner is connected to the positioning rod (503) to drive the valve seat (7) to rotate. The laser welds the circumferential weld seam between the valve seat (7) and the bottom plate (1). Synchronously, the external wire feeding mechanism fills the welding area with welding wire, and protects the welding area with inert gas. Adjust the laser power and the speed of the wire feeding mechanism according to the welding speed. Step E: Monitor the temperature of the weld seam through a thermal sensor, and control the welding heat input to reduce material deformation.

10. A welding method for a shock absorber solenoid valve seat according to claim 9, characterized in that: In the wire feeding direction of the wire feeding mechanism in Step D, the angle with the laser scanning direction of the laser is 30° - 60° for inclined wire feeding.