Method for improving the welding tightness of an oil reservoir cylinder of a shock absorber

Abstract

The present application relates to a kind of methods for improving the sealing performance of shock absorber oil storage cylinder welding, the tooling fixture for welding oil storage cylinder on seam welder is structurally improved, the tooling fixture is composed of fixture fixing piece, fixture swing piece, fixture rotating piece and connecting piece;Open arc magnet is mounted on the inside of recessed groove on the upper end of fixture fixing piece or the bracket on the outside of fixture swing piece;Active gear is mounted on the fixture rotating piece, the passive gear is symmetrically mounted on the left and right sides of active gear, and active gear is engaged with left and right passive gear during welding;Electronic control system is composed of rotational speed detection control system, ECU electronic control unit, position sensor, No.1 rotational speed sensor and No.2 rotational speed sensor;The present application has the advantages of accurate positioning during welding of oil storage cylinder, reducing the inaccuracy of oil storage cylinder positioning, reducing the damage to the rotating head of welder, improving the sealing performance of shock absorber oil storage cylinder welding;Electronic control system improves the welding sealing efficiency of oil storage cylinder.

Description

Technical Field

[0001] This invention relates to a method for improving the sealing performance of a shock absorber, and more particularly to a method for improving the welding sealing performance of the oil reservoir cylinder of a shock absorber. Background Technology

[0002] Shock absorbers are widely used in various types of automobiles and are a key and indispensable component to ensure vehicle safety performance. The sealing performance of the oil reservoir cylinder is crucial to the reliability and service life of the shock absorber.

[0003] The tooling fixtures for traditional welded shock absorber reservoir cylinders are positioned manually. Due to human error in manual positioning and the vibration of the tooling fixtures during the welding process of the welder, the precise positioning of the reservoir cylinder during welding cannot be guaranteed, which reduces the sealing performance of the reservoir cylinder. How to ensure the sealing performance of the shock absorber reservoir cylinder under ultra-high oil pressure has always been a research topic for engineers in this field.

[0004] Currently, Chinese Patent Publication No. CN104595410A discloses "A Method for Improving the Sealing Performance of a Magnetorheological Vibration Damper." This invention improves sealing performance by setting a three-stage sealing device on the outside of the piston rod to reduce pressure, but this only reduces the damping force and does not change the sealing performance of the oil reservoir. Chinese Patent Publication No. CN103307187A discloses "A Vibration Damper Sealing Structure." This solution can reduce oil leakage in vehicle hydraulic vibration dampers operating under ultra-high pressure, but the sealing structure is complex and the cost is high. This invention comprises a welding machine rotating head, lifting lugs, a fixture rotating component, a left driven gear, a right driven gear, a driving gear, a fixture rocking component, an open arc-shaped magnet, a No. 1 connector, a No. 2 connector, a fixture fixing component, a speed detection and control system, an ECU electronic control unit, a position sensor, a No. 1 speed sensor, and a No. 2 speed sensor. The open arc-shaped magnet is installed inside the concave groove at the upper end of the fixture fixing component or on the outer support of the fixture rocking component to ensure that the oil reservoir cylinder does not sway back and forth during welding of the bottom cover. A driving gear is installed on the fixture rotating component, with left and right driven gears symmetrically mounted on either side of the driving gear to ensure that the oil reservoir cylinder does not sway left and right during welding of the bottom cover. Accurate positioning of the tooling fixture improves the sealing performance of the welded oil reservoir cylinder. Simultaneously, electronic system control of the oil reservoir cylinder welding operation reduces manual operation steps, improves welding efficiency, and effectively guarantees the sealing effect of the welded oil reservoir cylinder. Summary of the Invention

[0005] The purpose of this invention is to provide a method for improving the welding sealing performance of the oil reservoir cylinder of a shock absorber, which is simple in structure, accurately positioned, and effectively solves the problem of welding sealing of the oil reservoir cylinder.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows:

[0007] A method for improving the welding sealing performance of the oil reservoir cylinder of a shock absorber, ensuring the welding sealing effect of the oil reservoir cylinder and improving welding efficiency. The components include a welding machine rotating head, lifting lugs, a clamp rotating part, a left driven gear, a right driven gear, a driving gear, a clamp swinging part, an open arc-shaped magnet, a clamp fixing part, a clamp base, a No. 1 connector, a No. 2 connector, a gasket, a speed detection and control system, an ECU electronic control unit, a position sensor, a No. 1 speed sensor, and a No. 2 speed sensor.

[0008] The open arc-shaped magnet is installed inside the concave groove at the upper end of the clamp fixing component or on the outer support of the clamp swing component. The opening of the open arc-shaped magnet faces directly forward during operation. The open arc-shaped magnet is fixedly clamped in the concave groove at the upper end of the fixing component, and the open arc-shaped magnet on the outer side of the clamp swing component is fixed by a support rod.

[0009] The tooling fixture has a concave groove at its upper end, and an arc-shaped groove inside the concave groove for installing an open arc-shaped magnet.

[0010] The clamp rotating part is equipped with a drive gear, which is welded to the rotating part as a whole. During the welding process, the drive gear and the rotating part rotate together.

[0011] The left driven gear and the right driven gear are respectively installed on the left and right sides of the driving gear. The left driven gear and the right driven gear are fixed by a bracket and can rotate on the bracket.

[0012] When the oil reservoir cylinder is being welded, the driving gear engages the two driven gears manually, and the axes of the three gears are on a longitudinal tangent.

[0013] The electronic control operating system for improving the welding efficiency of the oil storage cylinder includes a speed detection and control system, an ECU electronic control unit, a position sensor, a No. 1 speed sensor, and a No. 2 speed sensor.

[0014] The position sensor is installed in the concave groove at the upper end of the tooling fixture fixing part, and the sensor sensitive element is flush with the concave side of the groove.

[0015] The No. 1 speed sensor is installed at the lower end of the driven gear to detect the speed of the driven gear and feed the test data back to the speed detection and control system.

[0016] The No. 2 speed sensor is installed on the seam welding machine at the upper end of the welding machine's rotating head to detect the speed of the welding machine's rotating head and feed the test data back to the speed detection and control system.

[0017] The ECU (Electronic Control Unit) is connected to the speed detection and control system, the position sensor, speed sensor 1, and speed sensor 2.

[0018] The ECU (Electronic Control Unit) receives test signals from the speed detection and control system, and controls the welding machine head and the left and right driven gears to rotate in sequence to ensure that the sealing welding operation of the oil reservoir cylinder is carried out normally.

[0019] The speed detection and control system is used to detect the speed signals transmitted from speed sensor 1 and speed sensor 2.

[0020] The oil seal has an oblique hole to reduce the tangential clamping force of the oil seal spring.

[0021] The working process is as follows: Before welding, the oil reservoir cylinder is fitted onto the rotating clamp. The rotating clamp and the swaying fixture are always aligned, but not aligned with the fixed fixture. The swaying fixture is manually rotated into the concave groove and magnetically attracted by the open arc-shaped magnet. The driving gear on the rotating clamp meshes with the left and right driven gears, and the axes of the three gears are on the same longitudinal plane. The rotating clamp, the swaying fixture, and the fixed fixture are all on the same axial line. At this time, the position sensor contacts the swaying fixture and transmits the contact signal to the ECU (Electronic Control Unit). The ECU controls the welding machine to rotate the head to clamp the oil reservoir cylinder and weld it. During welding, the rotating clamp rotates at high speed, and the oil reservoir cylinder remains aligned with the same axial direction as the fixture. The bottom cover of the oil reservoir cylinder is equipped with lifting lugs, and the left and right sides of the oil reservoir cylinder seal are clamped and rotated for welding by the rotating head of the welding machine. When welding is complete, the ECU electronic control unit controls the left and right driven gears to retract the oil reservoir.

[0022] The beneficial effects achieved by the above-mentioned technical solution of the present invention are: reducing the phenomenon of inaccurate positioning of the oil reservoir cylinder and welding slippage damage to the rotating head of the welding machine caused by human error or machine vibration; improving welding efficiency and ensuring the welding sealing performance of the damper oil reservoir cylinder by using an open arc magnet and main and driven gears to accurately position the tooling fixture. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the tooling fixture for welding the oil reservoir cylinder of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the tooling fixture for welding the oil reservoir cylinder of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the tooling fixture for welding the oil storage cylinder with circuitry according to the present invention;

[0026] Figure 4 This is a schematic diagram of the circuit connection for welding the oil storage cylinder of the present invention;

[0027] Figure 5 This is a flowchart illustrating the electronic control process for welding the oil reservoir cylinder of the present invention.

[0028] Figure 6 This is a schematic diagram of the oil seal structure of the present invention.

[0029] Figure reference numerals: 1. Welding machine rotating head; 2. Lifting lug; 3. Oil reservoir cylinder; 4. Fixture rotating component; 5. Left driven gear; 6. Fixture rocker component; 7. Connector No. 1; 8. Fixture fixing component; 9. Position sensor; 10. Speed ​​detection and control system; 11. ECU electronic control unit; 12. Open arc magnet; 13. Speed ​​sensor No. 1; 14. Connector No. 2; 15. Right driven gear; 16. Drive gear; 17. Speed ​​sensor No. 2; 18. Piston rod; 19. Oil seal ring; 20. Slanted hole; 21. Oil seal spring. Detailed Implementation

[0030] To make the objectives, technical aspects, and advantages of this invention clearer, the technical solution will be described clearly and completely below with reference to the accompanying drawings.

[0031] The tooling fixture for the oil reservoir cylinder of the traditional welding model GBWJAP01 vibration damper includes a welding machine rotating head, lifting lugs, oil reservoir cylinder, fixture rotating parts, fixture swinging parts, No. 1 connecting parts, fixture fixing parts, and No. 2 connecting parts.

[0032] Figure 1 , Figure 2 Based on the traditional seam welding machine, a left driven gear 5, an open arc-shaped magnet 12, a right driven gear 15, and a driving gear 16 were added to improve the positioning accuracy of the tooling fixture.

[0033] Figure 1 An open-ended arc-shaped magnet 12 is mounted on the outer support of the jig swinging component 6. The lower end of the open-ended arc-shaped magnet 12 is connected and fixed by a support rod. The opening of the open-ended arc-shaped magnet 12 faces directly in front of the manual operation. During welding, the open-ended arc-shaped magnet 12 uses magnetic force to attract the jig swinging component 6, ensuring accurate positioning of the tooling fixture. The oil reservoir cylinder 3 is on the same axis as the entire tooling fixture, preventing the oil reservoir cylinder 3 from being too far forward or too far back during sealing welding, thus improving the positioning accuracy of the tooling fixture and the welding sealing effect of the oil reservoir cylinder 3.

[0034] Figure 2An open-ended arc-shaped magnet 12 is installed inside the concave groove at the upper end of the fixture fixing part 8. An arc-shaped groove is opened in the concave groove at the upper end of the fixture fixing part 8, and the open-ended arc-shaped magnet 12 is installed in the arc-shaped groove. During welding, the open-ended arc-shaped magnet 12 uses magnetic force to attract the fixture rocker part 6, ensuring accurate positioning of the tooling fixture. The oil storage cylinder 3 is on the same axis as the entire tooling fixture, preventing the oil storage cylinder 3 from being too far forward or too far back during sealing welding, thereby improving the positioning accuracy of the tooling fixture and the welding sealing effect of the oil storage cylinder 3.

[0035] Figure 1 and Figure 2 A drive gear 16 is mounted on the rotating part 4 of the central clamp. The drive gear 16 is welded to the rotating part 4 of the clamp as a whole. When the seam welding machine is working, the drive gear 16 rotates together with the rotating part 4 of the clamp. The left driven gear 5 and the right driven gear 15 are respectively mounted on the left and right sides of the drive gear 16 and fixed by a bracket. During operation, the left driven gear 5 and the right driven gear 15 rotate on the bracket. When the oil reservoir cylinder 3 is being seam welded, the drive gear 16 is manually engaged with the left driven gear 5 and the right driven gear 15, and the axes of the three gears are on the same longitudinal plane. The above gear installation ensures accurate positioning of the tooling fixture, and that the oil reservoir cylinder 3 is on the same axis as the entire tooling fixture. This prevents the oil reservoir cylinder 3 from being left or right during sealing welding, improves the positioning accuracy of the tooling fixture, enhances the welding effect, and ensures the welding sealing performance of the shock absorber oil reservoir cylinder 3.

[0036] Figure 3 For the electronic control system of sealing and welding the oil reservoir cylinder 3, when the oil reservoir cylinder 3 is accurately positioned by manual operation, the position sensor 9 contacts the jig swinging part 6 and transmits the contact electrical signal to the ECU electronic control unit 11. After processing the received electrical signal, the ECU electronic control unit 11 starts to control the welding machine to rotate the head 1 to perform seam welding on the bottom cover of the oil reservoir cylinder 3. After the welding is completed, the ECU electronic control unit 11 continues to control the left driven gear 5 and the right driven gear 15 to rotate (the left driven gear 5 rotates clockwise and the right driven gear 15 rotates counterclockwise in front of the operation) to remove the oil reservoir cylinder 3 and complete the welding operation.

[0037] Figure 4 The circuit connection diagram of the welding oil reservoir cylinder 3 of the present invention is shown. During welding, the No. 2 speed sensor 17 feeds back the measured speed signal of the welding machine rotating head 1 to the speed detection and control system 10. When welding ends, the No. 1 speed sensor 13 feeds back the driven gear speed signal measured when the oil reservoir cylinder 3 exits to the speed detection and control system 10. The speed detection and control system 10 processes the received electrical signal and transmits it to the ECU electronic control unit 11. The ECU electronic control unit 11 issues a command to continue working or stop working to ensure the normal progress of the welding work of the oil reservoir cylinder 3.

[0038] Figure 5The flowchart shows the electronic control process of welding the oil reservoir cylinder 3 according to the present invention. It basically realizes the automatic control of the electronic control system before and after welding, improves the working efficiency of welding the oil reservoir cylinder 3, and ensures the sealing of the oil reservoir cylinder 3 sealing welding.

[0039] Figure 6 The oil seal 19 with the oblique hole 20 can reduce the tangential clamping force of the oil seal spring 21. During the extension of the piston rod 18, due to the pressure difference between the two ends of the oblique hole 20, the oil pressure of the small hole inside the piston rod 18 is greater than that of the small hole outside the oblique hole. The hydraulic oil flows out from the small hole inside the piston rod (18) to the outside, reducing the oil pressure on the side of the oil seal 19 near the piston rod 18 and reducing the small leakage of hydraulic oil during operation. During the compression of the piston rod 18, due to the pressure difference between the two ends of the oblique hole 20, the oil pressure on the side of the oil seal of the oil reservoir cylinder 3 near the piston rod 18 is compensated, improving the sealing effect of the non-welded end of the oil reservoir cylinder 3.

Claims

1. A method for improving the welding sealing performance of a shock absorber oil reservoir cylinder, the method comprising the following components: a welding machine rotating head (1), a lifting lug (2), an oil reservoir cylinder (3), a clamp rotating component (4), a left driven gear (5), a clamp swing component (6), a No. 1 connecting component (7), a clamp fixing component (8), a position sensor (9), a speed detection and control system (10), an ECU electronic control unit (11), an open arc-shaped magnet (12), a No. 1 speed sensor (13), a No. 2 connecting component (14), a right driven gear (15), a driving gear (16), and a No. 2 speed sensor (17), characterized in that: The method includes installing a left driven gear (5), a right driven gear (15), a driving gear (16), and an open arc magnet (12) on a tooling fixture for welding the oil storage cylinder (3). The driving gear (16) is installed on the fixture rotating part (4), and the open arc magnet (12) is installed on the fixture fixing part (8), to ensure accurate positioning of the oil storage cylinder (3) during seam welding and improve the welding sealing performance of the oil storage cylinder (3). The driving gear (16) is welded to the clamp rotating part (4) as a whole. The driving gear (16) is symmetrically equipped with a left driven gear (5) and a right driven gear (15) on its left and right sides. The left driven gear (5) and the right driven gear (15) are fixed by a bracket. The axes of the left driven gear (5), the right driven gear (15), and the driving gear (16) are on a longitudinal tangent plane; The speed detection and control system (10) is used to detect the speed signals transmitted by the No. 1 speed sensor (13) and the No. 2 speed sensor (17), and feed back the processed test data to the ECU electronic control unit (11). During welding, the No. 2 speed sensor (17) feeds back the measured speed signal of the welding machine rotating head (1) to the speed detection and control system (10). When welding ends, the No. 1 speed sensor (13) feeds back the driven gear speed signal measured when the oil reservoir cylinder (3) exits to the speed detection and control system (10). The speed detection and control system (10) processes the received electrical signal and transmits it to the ECU electronic control unit (11). The ECU electronic control unit (11) issues a command to continue working or stop working to ensure the normal operation of the oil reservoir cylinder (3) welding work.

2. The method for improving the welding sealing performance of the oil reservoir cylinder of a shock absorber according to claim 1, characterized in that: The open arc magnet (12) is installed inside the concave groove at the upper end of the clamp fixing part (8) or the open arc magnet (12) is installed on the outer support of the clamp swing part (6).

3. The method for improving the welding sealing performance of the oil reservoir cylinder of a shock absorber according to claim 1, characterized in that: The ECU electronic control unit (11) automatically controls the welding machine to rotate the head (1) to seal the oil reservoir cylinder (3) and automatically controls the left driven gear (5) and right driven gear (15) to withdraw the oil reservoir cylinder (3) after the welding is completed.

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