WO2021217904A1

WO2021217904A1 - Positioning apparatus for welding of spring disc of shock absorber for automobile

Info

Publication number: WO2021217904A1
Application number: PCT/CN2020/102881
Authority: WO
Inventors: 陈根星; 贾春松; 杨廷凯; 宋坤杰
Original assignee: 西格迈股份有限公司
Priority date: 2020-04-26
Filing date: 2020-07-18
Publication date: 2021-11-04
Also published as: CN113618315A; CN111390476B; CN113618315B; CN111390476A

Abstract

A positioning apparatus for welding of a spring disc of a shock absorber for an automobile, comprising a base (1). A positioning platform (2) is provided on the base (1). The positioning platform (2) comprises a reference plate (201), a positioning plate (202), and six actuating cylinders (203) with both ends respectively connected to the reference plate (201) and the positioning plate (202) by means of universal hinges. The reference plate (201) is fixed on the base (1). The positioning plate (202) has six degrees of freedom with respect to the reference plate (201), and the location thereof can be adjusted by means of the actuating cylinders (203). A passage hole (2021) allowing an oil storage cylinder (7) to pass through is formed in the positioning plate (202), and correspondingly, an oil storage cylinder axial positioning column (3) is provided on the base (1). The upper end of the oil storage cylinder axial positioning column (3) is provided with an axial positioning step (301) matching the inner diameter of the oil storage cylinder (7). A spring disc circumferential positioning column (204) is provided on the positioning plate (202). The positioning apparatus has good flexibility and high versatility, can be adapted to the welding of spring discs of shock absorbers of different specifications, and is high in positioning precision and good in welded product consistency.

Description

Welding positioning device for spring plate of automobile shock absorber

Technical field

The invention relates to automobile spring disk welding technology, in particular to a welding positioning device for automobile shock absorber spring disks.

Background technique

Shock absorber is an indispensable and important part of automobile suspension system, mainly used to restrain the shock of shock absorption and the impact from the road surface when the shock absorber spring absorbs the shock. During the processing of the shock absorber, it is necessary to weld the spring disc on the oil storage tank. In the existing technology, when welding and positioning the spring plate of an automobile shock absorber, since the spiral rise angle of the spring plate must be consistent with the design process requirements, different tooling must be designed according to different products. At present, it is mainly divided into the following two types:

1) The concave mold consistent with the shape of the spring disc (the concave mold is formed by three-dimensional modeling of the spring disc and then milled by a machining center with metal materials). Its structure is reliable and stable, and product consistency is good; however, it has high requirements for personnel skills and high cost investment, requiring a CNC machining center, and it has no versatility.

2) Three-point or multi-point tooling. This structure adopts the principle of three-point force balance and is composed of a metal disc and adjustable bolts. The structure is simple and easy to process; however, the structural stability is not good enough, the product consistency after welding is not good, and the versatility is poor.

technical problem

Aiming at the shortcomings of the prior art, the present invention provides a welding positioning device for the spring plate of an automobile shock absorber. The automobile shock absorber spring disc welding positioning device of the present invention has good flexibility and strong versatility, can adapt to the welding of shock absorber spring discs of different specifications, has high positioning accuracy, and has good product consistency after welding.

Technical solutions

The present invention provides the following technical solutions: a welding positioning device for the spring plate of an automobile shock absorber, including a base; a positioning platform is provided on the base; An actuator connected to a reference plate and a positioning plate; the reference plate is fixed on the base, the positioning plate has six degrees of freedom relative to the reference plate, and the position can be adjusted by the actuator; the positioning plate is provided with Correspondingly, the base is provided with an axial positioning column of the oil storage cylinder, and the upper end of the axial positioning column of the oil storage cylinder is provided with an axial positioning step corresponding to the inner diameter of the oil storage cylinder; The positioning plate corresponds to the water leakage hole on the spring disk, and is provided with a spring disk circumferential positioning column.

Beneficial effect

Compared with the prior art, the welding positioning device for the spring plate of the automobile shock absorber of the present invention has made the following remarkable progress:

1) The device has good flexibility and strong versatility; the positioning plate of the present invention has six degrees of freedom and can be driven by the actuator, so that the positioning plate can be adjusted to the corresponding by controlling the work of the actuator according to the design requirements of different products The position can be adapted to the welding positioning requirements of the spring discs of different specifications of shock absorbers, realizing quick type change, and there is no need to design a variety of tooling for products of multiple specifications, which can reduce the investment of tooling, site, and working hours;

2) The positioning accuracy is high, and the product consistency after welding is good; the present invention adjusts the position of the positioning plate through the actuator. After the adjustment is completed, the actuator supports the positioning plate. The positioning accuracy is high and the stability is good. The product consistency after welding is good ；

3) Convenient operation; the present invention uses the oil storage cylinder axial positioning column provided on the base to axially position the oil storage cylinder, and uses the spring disk circumferential positioning column provided on the positioning plate to perform circumferential positioning of the spring disk. At the same time, only need to put the spring plate on the positioning plate, and make the designated leak hole on the spring plate match the circumferential positioning column of the spring plate, and then make the oil storage cylinder pass through the assembly hole on the spring plate and the channel on the positioning plate in sequence The hole is inserted into the axial positioning column of the oil storage cylinder and matched with the axial positioning step to complete the welding positioning. The entire operation process is simple and convenient.

In the aforementioned automotive shock absorber spring disk welding positioning device, the actuating cylinder may be a servo hydraulic cylinder.

As an optimization, in the aforementioned automobile shock absorber spring disk welding positioning device, a set of lever cylinders for clamping the spring disk is provided on the base along the circumferential direction of the positioning plate; the lever cylinder is fixed to the base through the cylinder bracket United. By setting the lever cylinder, after the positioning of the spring plate is completed, the lever cylinder is used to clamp the spring plate to prevent the spring plate from moving during the welding process, thereby increasing the yield rate and reducing defective products. Further, the number of the lever cylinders may be three, which are arranged at an angular interval of 120 degrees along the circumferential direction.

As an optimization, in the aforementioned automotive shock absorber spring disk welding positioning device, the positioning plate is provided with a spring disk edge contour center positioning groove for matching with the edge of the spring disk. When working, the spring disk is placed in the center positioning groove of the edge contour of the spring disk. The edge contour of the spring disk coincides with the center of the center positioning groove of the edge contour of the spring disk. The center of the edge contour of the spring disk is positioned. The spring disk specifies the leak hole and the spring. The disc circumferential positioning column cooperates to position the spring disc in the circumferential direction, so there is no need to locate the spring disc through the assembly hole on the spring disc and the oil storage cylinder. The assembly hole on the spring disc can be designed to be larger than the outer diameter of the oil storage cylinder. Slightly larger, it is convenient for the oil storage tank to pass through, making the operation easier. Further, the circumferential positioning post of the spring disk is movably connected with the positioning plate, and the position can be adjusted in the radial direction of the center positioning groove along the edge contour of the spring disk. When the positioning plate is provided with the center positioning groove of the edge contour of the spring disk, the relative position of the spring disk and the positioning plate is fixed, and the spring disk can only rotate in the center positioning groove of the contour of the spring disk edge. In the case that the circumferential positioning post of the spring plate cannot be matched with the leak hole on the spring plate, the versatility of the device is limited. The spring disk circumferential positioning column is designed to adjust the position along the radial direction of the center positioning groove of the edge contour of the spring disk, so that the position of the spring disk circumferential positioning column can be adjusted so that the water leakage hole on the spring disk can be aligned with the spring disk circumferential direction. The positioning column is smoothly matched to make up for the limitation of the adjustable range due to the setting of the center positioning groove of the edge contour of the spring disk. Still further, the spring disk circumferential positioning column may be arranged in the following manner: the positioning plate is provided with strip-shaped adjusting holes distributed radially along the center positioning groove of the edge contour of the spring disk; the spring disk circumferential positioning column The lower end is provided with a blocking head, and a thread is machined above the blocking head; the upper end of the spring disk circumferential positioning column penetrates from the bar-shaped adjusting hole from bottom to top, and is locked by a lock nut matched with the thread on it. The circumferential positioning column with the spring disk provided with the above structure is easy to manufacture and convenient to implement.

As an optimization, in the aforementioned automotive shock absorber spring disk welding positioning device, the spring disk circumferential positioning column is sleeved with an adjustment tube whose outer diameter is compatible with the size of the water leakage hole on the spring disk. By setting the adjustment tube, the outer wall of the adjustment tube abuts against the edge of the water leakage hole, after the spring plate is positioned, the displacement is not easy to occur, and the yield rate can be improved. The adjustment tube can be plugged or screwed with the spring disk circumferential positioning column.

As an optimization, in the aforementioned automobile shock absorber spring disk welding positioning device, the upper end of the oil storage cylinder axial positioning column is provided with a plurality of axial positioning steps corresponding to the inner diameters of the oil storage cylinders of different specifications. The diameter of the oil storage cylinder of different shock absorber products is different, and the versatility of the device of the present invention can be further improved by arranging a plurality of axial positioning steps adapted to the oil storage cylinders of different specifications.

Description of the drawings

Figure 1 is a schematic structural view of the welding positioning device for the spring plate of the automobile shock absorber of the present invention;

2 is a schematic structural view of Embodiment 1 of the welding positioning device for the spring disk of an automobile shock absorber of the present invention;

Fig. 3 is a schematic diagram of the working state of the welding positioning device for the spring plate of the automobile shock absorber in Fig. 2;

4 is a schematic structural view of Embodiment 2 of the welding positioning device for the spring disk of the automobile shock absorber of the present invention;

Fig. 5 is a schematic diagram of the working state of the welding positioning device for the spring plate of the automobile shock absorber in Fig. 4;

Fig. 6 is a structural schematic diagram of the axial positioning column of the oil storage cylinder in the welding positioning device for the spring disk of the automobile shock absorber of the present invention. (With multiple axial positioning steps)

Marks in the drawings: 1-base; 2-positioning platform, 201-reference plate, 202-positioning plate, 2021-passage hole, 2022-spring disk edge contour center positioning groove, 2023-bar adjustment hole, 203-actuation Cylinder, 204-spring disk circumferential positioning column, 205-locking nut, 206-adjusting tube; 3-axial positioning column for oil storage cylinder, 301-axial positioning step; 4-lever cylinder; 5-cylinder bracket; 6 Spring plate; 7-storage tank; 8-shock absorber mounting bracket; 9-bracket locator, 901-support column, 902-positioning rod.

The best mode of the present invention

In the following, the present invention will be further described in conjunction with the drawings and specific implementations (examples), but it is not used as a basis for limiting the present invention.

Referring to Figures 1-6, the automobile shock absorber spring plate welding positioning device of the present invention includes a base 1; the base 1 is provided with a positioning platform 2; the positioning platform 2 includes a reference plate 201, a positioning plate 202, and six The two ends of the support are respectively connected to the reference plate 201 and the positioning plate 202 via a universal hinge. The reference plate 201 is fixed on the base 1 and the positioning plate 202 has six degrees of freedom relative to the reference plate 201. The position can be adjusted by the actuator 203 (the positioning platform 2 is a six-degree-of-freedom platform, and the reference plate 201 is used as the XY-axis plane to establish XYZ three-axis rectangular coordinates. The positioning plate 202 has the freedom to move along the X, Y, and Z axes. And the degree of freedom of rotation around the X, Y, and Z axes); the positioning plate 202 is provided with a passage hole 2021 for the oil storage cylinder 7 to pass through, and correspondingly, the base 1 is provided with an oil storage cylinder axial positioning column 3. The upper end of the oil storage cylinder axial positioning column 3 is provided with an axial positioning step 301 that is compatible with the inner diameter of the oil storage cylinder 7; Positioning post 204 (the size of the positioning post 204 can be the same as the size of the corresponding leak hole on the spring plate 6, or smaller than the size of the corresponding leak hole on the spring plate 6. The size of the spring plate circumferential positioning post 204 is designed to be smaller , The versatility is better. When the size of the spring disk circumferential positioning post 204 is smaller than the size of the corresponding leak hole, after mating, the spring disk circumferential positioning post 204 and the corresponding leak hole are eccentric, and the side part and the side wall of the leak hole offset).

The actuating cylinder 203 may be a servo hydraulic cylinder, which is controlled by a PLC controller connected to a MES system (manufacturing enterprise production process execution management system). When working, the worker selects the type of shock absorber to be processed through the man-machine interface. The PLC controller retrieves the relevant process parameters from the MES system according to the shock absorber model, then controls the actuator 203 to work, and adjusts the positioning plate 202 to the setting Location.

On the base 1, along the circumferential direction of the positioning plate 202, a set of lever cylinders 4 for clamping the spring plate 6 may be provided; the lever cylinder 4 may be fixedly connected to the base 1 through a cylinder bracket 5. Therefore, after the positioning of the spring disk 6 is completed, the spring disk 6 can be clamped by the lever cylinder 4 to prevent the spring disk 6 from moving during the welding process, resulting in defective products.

The process route of welding spring disk 6 can be pre-position welding with argon arc welding after positioning on the positioning device (welding several points along the circumference of the assembly hole of spring disk 6 to fix spring disk 6), and then transfer to welding Form welding is performed in the equipment; it can also be directly formed and welded in the welding equipment after the positioning is completed in the positioning device installed in the welding equipment. The welding positioning device for the spring disk of the automobile shock absorber of the present invention can be used for the pre-positioning of the first process route and the positioning of the second process route.

During the shock absorber production process, the shock absorber mounting bracket 8 needs to be welded on the oil storage cylinder 7. The shock absorber mounting bracket 8 can be welded with the spring plate 6 at the same time, or the shock absorber mounting bracket 8 can be welded first and then welded. The spring plate 6 or the spring plate 6 is welded first and the shock absorber mounting bracket 8 is welded. The spring disk 6 and the shock absorber mounting bracket 8 are welded at the same time or after welding the shock absorber mounting bracket 8. The spring disk 6 needs to be positioned relative to the shock absorber mounting bracket 8, so corresponding tooling is required for the shock absorber mounting bracket 8 Perform positioning to determine the position of the shock absorber mounting bracket 8. When welding the spring disk 6, if the shock absorber mounting bracket 8 has been welded to the oil storage cylinder 7, the spring disk 6 needs to be positioned relative to the shock absorber mounting bracket 8, so the position of the shock absorber mounting bracket 8 needs to be determined first. If the spring plate 6 is welded according to the above-mentioned first process route, a bracket locator 9 can be provided on the bottom plate 1 for positioning the shock absorber mounting bracket 8.

Example 1 (see Figure 2 and Figure 3):

The number of the lever cylinders 4 is three, which are arranged in pairs along the circumferential direction of the positioning plate 202 at an angular interval of 120 degrees.

The positioning plate 202 is provided with a spring disk edge contour center positioning groove 2022 for matching with the edge of the spring disk 6. The spring disk 6 is placed in the spring disk edge contour center positioning groove 2022, the edge of the spring disk 6 abuts the inner wall of the spring disk edge contour center positioning groove 2022, the spring disk 6 edge center coincides with the center of the spring disk edge contour center positioning groove 2022, The center of the spring disk 6 cannot move relative to the positioning plate 202, but the spring disk 6 can rotate around the center of the circle. In this embodiment, the positioning plate 202 is provided with a spring disc edge contour center positioning groove 2022. In fact, if the shock absorber manufacturer needs to weld spring discs 6 of different sizes (edge contour diameter), the positioning plate 202 A plurality of spring disc edge contour center positioning grooves 2022 may be correspondingly provided.

The circumferential positioning post 204 of the spring disk is movably connected with the positioning plate 202, and the position of the positioning groove 2022 can be adjusted in the radial direction along the edge contour of the spring disk. When the spring disk circumferential positioning post 204 cannot be matched with the water leakage hole on the spring disk 6, the spring disk circumferential positioning post 204 is adjusted so that the position in the radial direction of the center positioning groove 2022 of the spring disk edge contour is consistent with the water leakage of the spring disk 6. The positions of the holes are consistent, so that the leaking holes on the spring plate 6 can be smoothly matched with it. The specific structure in this embodiment is: the positioning plate 202 is provided with strip-shaped adjustment holes 2023 distributed radially along the center positioning groove 2022 of the edge contour of the spring disk; the lower end of the spring disk circumferential positioning column 204 is provided with a stopper The upper end of the blocking head 2041 is threaded; the upper end of the spring disk circumferential positioning post 204 penetrates from the bar-shaped adjusting hole 2023 from bottom to top, and is locked by a lock nut 205 matched with the thread on it.

The spring disk circumferential positioning post 204 is sleeved with an adjusting tube 206 whose outer diameter is compatible with the size of the water leakage hole on the spring disk 6. When positioning, the outer side wall of the adjusting tube 206 abuts against the hole wall of the water leakage hole on the spring plate 6 and plays a role of fixing the spring plate 6. In this embodiment, the size of the spring disk circumferential positioning post 204 is smaller than the size of the corresponding water leakage hole. When working, the worker selects an adapted adjustment tube 206 to install on the spring disk circumferential positioning post according to the model of the spring disk 6 that needs to be welded. 204 on.

The upper end of the oil storage cylinder axial positioning column 3 is provided with a plurality of axial positioning steps 301 respectively adapted to the inner diameter of the oil storage cylinder 7 of different specifications. The specific specifications and quantity of the axial positioning steps 301 are determined according to the products of the shock absorber manufacturer.

The welding positioning device for the spring plate of the automobile shock absorber of this embodiment can be installed in a welding equipment, and the spring plate 6 is welded through the above-mentioned second process route.

Example 2 (see Figure 4 and Figure 5):

The difference from Embodiment 1 is that in this embodiment, the lever cylinder 4 is not installed on the base 1, and a bracket locator 9 is provided on the base 1. The bracket locator 9 includes a support column 901 fixed on the base 1 and a positioning rod 902 transversely arranged on the top of the support column 901. The spring disk welding positioning device for automobile shock absorbers of this embodiment can be used to pre-position and weld the spring disk 6 on the oil storage cylinder 7 on which the shock absorber mounting bracket 8 has been welded, and the shock absorber mounting bracket 8 is positioned by the bracket locator 9. After the positioning of the spring plate 6 is completed, it is fixed by argon arc welding to complete the pre-position welding. Then transfer the workpiece to the welding equipment for forming welding. It can be seen that this embodiment provides a welding pre-positioning device for the spring plate of an automobile shock absorber. In this embodiment, the lever cylinder 4 is not provided because during pre-positioning argon arc welding, workers generally press the spring plate 6 with their hands, and the probability of the spring plate 6 moving is low. Of course, a lever cylinder 4 can also be provided on the pre-positioning device to further improve the positioning reliability.

Industrial applicability

Referring to Figures 1-6, the welding positioning device of the spring disk of the automobile shock absorber of the present invention can realize the welding positioning of the spring disk of the automobile shock absorber; the welding positioning device of the spring disk of the automobile shock absorber includes a base 1; A positioning platform 2 is provided; the positioning platform 2 includes a reference plate 201, a positioning plate 202, and six actuators 203 whose ends are respectively connected to the reference plate 201 and the positioning plate 202 through universal hinges; the reference plate 201 Fixed on the base 1, the positioning plate 202 has six degrees of freedom relative to the base 1, and the position can be adjusted by the actuator cylinder 203; the positioning plate 202 is provided with a passage hole 2021 through which the oil storage cylinder 7 can pass. Correspondingly, the base 1 is provided with an oil storage cylinder axial positioning column 3, and the upper end of the oil storage cylinder axial positioning column 3 is provided with an axial positioning step 301 adapted to the inner diameter of the oil storage cylinder; the positioning plate 202 is provided with an axial positioning step 301 A circular circumferential positioning groove 2022 adapted to the size of the spring disk, and at least one spring disk circumferential positioning post 204 corresponding to the water leakage hole on the spring disk; the actuating cylinder 203 is connected to the PLC controller; , The PLC controller controls the action of the actuator cylinder 203 according to the set parameters, adjusts the positioning plate 202 to a specific position, and then places the spring plate 6 on the positioning plate 202, and places the designated leaking hole on it on the positioning plate 202 The corresponding spring disk circumferential positioning post 204 is matched (the spring disk 6 is usually provided with multiple water leakage holes. When designing the welding process, designate one of the water leakage holes to cooperate with the spring disk circumferential positioning post 204); then let the oil storage tank 7 Pass through the assembly hole on the spring plate 6 and the channel hole 2022 on the positioning plate 202 in sequence and insert it into the axial positioning column 3 of the oil storage cylinder, and cooperate with the axial positioning step 301 to complete the welding positioning. The welding positioning method of the spring plate of the automobile shock absorber of the present invention has high positioning accuracy and good product consistency after welding.

On the base 1, along the circumferential direction of the positioning plate 202, a set of lever cylinders 4 for clamping the spring plate 6 can be provided; the lever cylinders 4 can be electrically connected to the PLC controller; when working, the oil storage cylinder 7 After being inserted on the axial positioning column 3 of the oil storage cylinder, the PLC controller controls the action of the lever cylinder 4 to clamp the spring plate 6. Therefore, the spring plate is prevented from being displaced during the welding process, and the welding yield rate is improved.

Claims

A welding positioning device for the spring plate of an automobile shock absorber is characterized in that it includes a base (1);

The base (1) is provided with a positioning platform (2); the positioning platform (2) includes a reference plate (201), a positioning plate (202), and the six ends are respectively passed through a universal hinge and a reference plate (201) ) And the actuator (203) connected to the positioning plate (202); the reference plate (201) is fixed on the base (1), and the positioning plate (202) has six freedoms relative to the reference plate (201) The position can be adjusted by the actuator (203); the positioning plate (202) is provided with a passage hole (2021) through which the oil storage cylinder (7) can pass. Correspondingly, the base (1) is provided with The oil storage cylinder axial positioning column (3), the upper end of the oil storage cylinder axial positioning column (3) is provided with an axial positioning step (301) adapted to the inner diameter of the oil storage cylinder (7); on the positioning plate (202), Corresponding to the water leakage hole on the spring disk (6), a spring disk circumferential positioning column (204) is provided.
The welding positioning device for the spring disk of an automobile shock absorber according to claim 1, wherein the base (1) is provided with a set of lever cylinders for clamping the spring disk along the circumferential direction of the positioning plate (202) (4); The lever cylinder (4) is fixedly connected to the base (1) through the cylinder bracket (5).
The welding positioning device for the spring disk of the automobile shock absorber according to claim 2, characterized in that: the number of the lever cylinders (4) is three, which are arranged in pairs at an angular interval of 120 degrees along the circumferential direction.
The spring disk welding positioning device for automobile shock absorbers according to claim 1, 2 or 3, characterized in that: the positioning plate (202) is provided with a spring disk edge profile for matching with the edge of the spring disk (6) Center positioning groove (2022).
The automobile shock absorber spring disk welding positioning device according to claim 4, characterized in that: the spring disk circumferential positioning column (204) is movably connected with the positioning plate (202), and can follow the edge contour center of the spring disk. The radial adjustment position of the positioning groove (2022).
The welding positioning device for the spring disk of an automobile shock absorber according to claim 5, characterized in that: the positioning plate (202) is provided with strip-shaped adjustments distributed radially along the center positioning groove (2022) of the edge contour of the spring disk. Hole (2023); the lower end of the spring disk circumferential positioning column (204) is provided with a blocking head (2041), and the upper end of the blocking head (2041) is machined with threads; the upper end of the spring disk circumferential positioning column (204) is strip-shaped The adjusting hole (2023) penetrates from bottom to top, and is locked by a lock nut (205) matched with the thread on it.
The spring disk welding positioning device for automobile shock absorbers according to claim 1, 2 or 3, characterized in that: the spring disk circumferential positioning column (204) is sleeved with an outer diameter and a spring disk (6). Adjusting pipe (206) that is compatible with the size of the leaking hole.
The automobile shock absorber spring disk welding positioning device according to claim 1, 2 or 3, characterized in that: the upper end of the oil storage cylinder axial positioning column (3) is provided with a plurality of oil storage cylinders (with different specifications). 7) Axial positioning step (301) adapted to the inner diameter.