Automobile sheet metal part welding tool

Abstract

The invention relates to a welding tool, in particular to an automobile sheet metal part welding tool which comprises a first cushion block, a second cushion block, a third cushion block and a fourth cushion block. The positioning blocks are symmetrically arranged on the two sides of the first cushion block, and protruding parts are arranged on the positioning blocks and suitable for being matched with hole sites in a plate in an inserted mode; the deviation rectifying block is provided with a deviation rectifying hole; the end of the sliding block is suitable for being matched with the deviation rectifying hole in an inserted mode, and the position close to the tail end is fixedly connected with the positioning block. The guide block is provided with a guide hole, and the sliding block is in sliding fit in the guide hole; a piston rod of the first cylinder is connected with the slider. The sliding block is limited through the guide block, the tail end position of the sliding block is corrected through the correction block, the tail end position of the sliding block is prevented from deviating, the tail end of the sliding block is located at the accurate position, the positioning block is fixed to the position, close to the tail end, of the sliding block, it is guaranteed that the positioning block is located at the accurate position, and therefore even if an air cylinder is used as a driver, the positioning block can be accurately positioned. And the effect of accurate insertion and matching of the protruding part and the hole site can be ensured.

Description

Technical Field

[0001] The invention relates to a welding tool, in particular to a welding tool for automobile sheet metal parts. Background Art

[0002] Sheet metal is a comprehensive cold processing technology for metal plates. The process includes cutting, punching / cutting / combining, disassembling, welding, riveting, splicing, forming, etc. Sheet metal parts are products formed by sheet metal processing. They are now widely used in automobile bodies, referred to as automotive sheet metal parts.

[0003] During the processing of automotive sheet metal parts, some sheet metal parts need to be assembled and welded using different components. During the welding process, the components are deformed due to the uneven temperature field. Therefore, it is necessary to position the components first and then weld them to limit the deformation of the components during welding.

[0004] The prior art uses a cylinder to connect a positioning block to press a component. The component is preset with a hole, and the positioning block has a protrusion corresponding to the hole. When the piston rod of the cylinder presses the positioning block against the surface of the component, the protrusion is plugged into the hole to complete the positioning of the component.

[0005] In welding Figure 1 The automobile sheet metal part 100 shown has a symmetrical plate 101, so it is necessary to configure two symmetrically arranged cylinders and positioning blocks for positioning the two plates respectively. However, when the telescopic rod of the cylinder moves, there is an offset error in the direction perpendicular to the telescopic rod, and the position repeatability of the cylinder is low. The protrusion on the positioning block will be misaligned with the hole position, and the two cannot be plugged in and matched. Under such low-precision working conditions, in order to allow the protrusion to enter the hole smoothly, a guiding slope is generally provided on the end face of the protrusion facing the hole so that the protrusion can be squeezed into the hole. This method solves the problem on the surface, but does not take into account that when the protrusion is misaligned with the hole, the protrusion will squeeze into the hole and exert an extrusion force on the plate in a direction perpendicular to the telescopic rod, which will cause two consequences: First, when the extrusion force is greater than the static friction between the plate and the positioning block, the plate will slide relative to the positioning block, causing the root of the plate to twist and deform; Second, when the extrusion force does not exceed the static friction between the plate and the positioning block, the plate will not move relative to the positioning block, but the edge of the hole will most likely be crushed by the protrusion, resulting in unqualified product acceptance.

[0006] In order to completely solve the above problems, the cylinder can be replaced with an electric cylinder. Since the position repeatability of the electric cylinder can reach ±0.01mm or even higher, the protrusion can be accurately plugged into the hole without worrying about the protrusion squeezing the plate to cause displacement or the protrusion crushing the edge of the hole. However, replacing the electric cylinder increases the cost, so there is an urgent need for a welding tooling solution for automotive sheet metal parts that still uses the cylinder as the driver. Summary of the invention

[0007] In view of this, the present invention provides a welding tool for automobile sheet metal parts, which aims to solve the problem of how to ensure the precise plug-in fit between the protrusion and the hole when a cylinder is used as a driver.

[0008] In order to solve the above problems, the present invention provides an automobile sheet metal welding tool, comprising: The first pad is fixed in position, located between the two plates, and abuts against the opposite surfaces of the two plates; Positioning blocks are symmetrically arranged on both sides of the first cushion block, the plate is suitable for being clamped between the positioning blocks and the first cushion block, and the positioning blocks are provided with protrusions suitable for plugging and matching with the holes on the plate; A deflection correction block, which is fixed in position and has deflection correction holes; Slide blocks are symmetrically arranged on both sides of the deviation-correcting block, with ends thereof being adapted to be plugged into and matched with the deviation-correcting holes, and being fixedly connected to the positioning block near the end; The guide blocks are symmetrically arranged on both sides of the deviation-correcting block and have guide holes, and the sliders are slidably fitted in the guide holes; The first cylinder is fixed in position, and its piston rod is connected to the sliding block.

[0009] Optionally, the above-mentioned automobile sheet metal welding tool further includes a second pad which is fixed in position and located below the sheet metal, and the upper surface of the second pad is in contact with the downward surface of the sheet metal.

[0010] Optionally, the above-mentioned automobile sheet metal welding tool further includes a second cylinder, whose piston rod is connected to a pressure plate, and the pressure plate is suitable for pressing on the upward surface of the sheet metal.

[0011] Optionally, the piston rod of the second cylinder is pivotally connected to an end of the pressure plate away from the sheet metal part, a portion of the pressure plate located between the sheet metal part and the piston rod is pivotally connected to the second cushion block, and all pivot axes on the pressure plate are parallel.

[0012] Optionally, the second cushion block is provided with an embedding groove in which a removable embedding block is embedded, and an insert block protruding from the top of the embedding block is provided to be plugged into and matched with a notch on the sheet metal component.

[0013] Optionally, the above-mentioned automobile sheet metal welding tooling also includes a third cylinder and a limit column with a fixed position, the limit column is provided with a limit hole, the piston rod of the third cylinder is slidingly matched with the limit hole, the piston rod of the third cylinder points to the sheet metal and a protrusion is provided at the end of the piston rod, and the protrusion is suitable for plugging and matching with the through hole on the vertical plate at the edge of the sheet metal.

[0014] Optionally, the deflection-correcting block is fixed on the first cushion block, and the two positioning blocks are also symmetrical about the deflection-correcting block.

[0015] Optionally, a mounting hole is provided on the surface of the positioning block facing the plate, the contour of the mounting hole is the same as the contour of the hole position on the plate, and the protrusion is cooperatedly provided in the mounting hole.

[0016] Optionally, the first cushion block includes a thicker middle body and a thinner side body, the side bodies are detachably connected to the opposite sides of the middle body, the plate is suitable for being clamped between the side bodies and the positioning block, the protrusion passes through the plate, and the side bodies are provided with holes for accommodating the protrusion.

[0017] Optionally, the positioning block is provided with a stud hole connected to the mounting hole, a stud is arranged in the stud hole, and the stud is connected to the protrusion by a thread.

[0018] Compared with the prior art, the technical solution of the present invention has the following advantages: 1. Use the guide block to initially limit the slider, and then use the correction block to correct the end position of the slider to avoid the end position of the slider being offset due to factors such as the uneven surface of the slider, the uneven inner wall of the guide hole of the guide block, and the matching gap between the slider and the guide block that allows the slider to offset. The end of the slider is located at the accurate position, and the positioning block is fixed near the end of the slider to ensure that the positioning block is in the accurate position, so that even if the cylinder is used as the driver, the protrusion can be accurately plugged into the hole.

[0019] 2. Use the second pad to support the bottom of the sheet metal, and use the pressure plate to press the sheet metal onto the second pad to prevent the sheet metal from moving in the vertical direction.

[0020] 3. The pressing plate is hinged by the second cylinder, and the pressing plate is also hinged to the second cushion block, so that the pressing plate is driven by the second cylinder to rotate and press the second cushion block, or the pressing plate is lifted from the second cushion block.

[0021] 4. By embedding a removable embedding block in the embedding groove of the second pad, the embedding block can be replaced to adapt to gaps of different shapes and sizes on various sheet metal parts.

[0022] 5. Use the limiting holes on the limiting column to guide and limit the piston rod of the third cylinder, so as to achieve precise plug-in fit between the piston rod and the through hole on the vertical plate at the edge of the sheet metal part.

[0023] 6. By designing the positioning block and the protrusion to be detachable and split, the protrusion of the corresponding shape can be replaced according to the shape of the hole on the plate, without the need to replace the positioning block as a whole, thereby reducing processing costs and improving processing efficiency.

[0024] 7. By designing the first cushion block to be a detachable combination of a thicker middle body and a thinner side body, when the size of the hole position on the plate changes, causing the size of the protrusion to be larger than the size of the hole on the side body, so that the hole cannot accommodate the protrusion, the problem can be solved by replacing the side body only, without the need to replace the first cushion block as a whole, thereby reducing processing costs and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a sheet metal part in the background technology of the present invention.

[0027] Figure 2 It is a front view of the automobile sheet metal welding tool in an embodiment of the present invention.

[0028] Figure 3 It is a three-dimensional diagram of a welding tool for automobile sheet metal parts in an embodiment of the present invention.

[0029] Figure 4 It is a schematic diagram of the connection between the positioning block and the sheet metal part in an embodiment of the present invention.

[0030] Figure 5 It is a schematic diagram of the connection between the second pad and the sheet metal component in an embodiment of the present invention.

[0031] Figure 6 It is a schematic diagram of the connection between the positioning block, the first cushion block and the sheet metal part in an embodiment of the present invention.

[0032] Figure 7 It is a schematic diagram of the connection between the positioning block, the side body and the sheet metal part in the embodiment of the present invention.

[0033] In the figure: first cushion block 1, intermediate body 11, side body 12, hole 121, positioning block 2, mounting hole 21, stud hole 22, protrusion 23, correction block 3, correction hole 31, slider 4, guide block 5, guide hole 51, first cylinder 6, second cushion block 7, embedded groove 71, embedded block 72, insert block 73, second cylinder 8, pressure plate 9, pivot shaft 10, third cylinder 13, protrusion 131, limit column 14, limit hole 141, adapter block 15; Sheet metal part 100 , plate 101 . DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0037] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0038] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0039] Please refer to Figure 1 The present invention provides an automobile sheet metal welding tool, which is suitable for welding an automobile sheet metal part 100 composed of multiple parts. After the sheet metal part 100 is positioned on the welding tool, the bottom is horizontal, and two vertical and parallel plates 101 extend upward from the bottom, and the plates 101 have holes; the bottom edge is bent upward to form a vertical plate, and the plate has through holes.

[0040] Please refer to Figure 2 and Figure 3The automobile sheet metal welding tooling includes two groups of first cylinders 6 and guide blocks 5 fixedly arranged on the platform, each group includes a first cylinder 6 and a guide block 5 arranged adjacent to each other; a cylinder bracket is fixedly arranged on the platform, and the first cylinder 6 is installed on the cylinder bracket; a guide hole 51 is provided on the guide block 5, and the guide hole 51 passes through the opposite sides of the guide block 5, the piston rod of the first cylinder 6 points to the guide hole 51, and the inner wall of the guide hole 51 is parallel to the axis of the piston rod of the first cylinder 6.

[0041] The slide block 4 is slidably arranged in the guide hole 51. The slide block 4 is a straight prism or a straight cylinder. The smaller the clearance between the side wall of the slide block 4 and the inner wall of the guide hole 51, the better. It is sufficient as long as the first cylinder 6 can overcome the friction between the slide block 4 and the guide hole 51 to push and pull the slide block 4 to move axially. In order to save materials or reduce weight, a hole can be opened on the surface of the slide block 4.

[0042] The end of the piston rod of the first cylinder 6 is connected to the end of the slider 4, which can be connected by welding or detachable connection. For example, the detachable connection method is: a T-slot is set at the end of the slider 4, and a T-block is fixed at the end of the piston rod. The T-block is inserted into the T-slot to achieve the connection between the piston rod and the slider 4. When disassembly is required, just remove the T-block from the T-slot.

[0043] The automobile sheet metal welding tool also includes a first pad 1 fixed on the platform. The first pad 1 is fixed to the platform through a bracket. The bracket suspends the first pad 1 between the two plates 101, and the first pad 1 is in contact with the opposite surfaces of the two plates 101.

[0044] Please refer to Figure 2 and Figure 3 The automobile sheet metal welding tooling also includes a fixed correction block 3, two guide blocks 5 are symmetrically arranged on both sides of the correction block 3, and the first cylinder 6 is also symmetrically arranged on both sides of the correction block 3; the correction block 3 can be fixed to the platform by a bracket, and can also be directly fixed on the first cushion block 1; the correction block 3 has a correction hole 31, the correction hole 31 runs through the two side surfaces of the correction block 3 facing the slider 4, the two sliders 4 are symmetrically arranged on both sides of the correction block 3, and the sliders 4 are opposite to the correction holes 31. When the sliders 4 are driven to move, the ends of the sliders 4 can be plugged into and matched with the correction holes 31; the smaller the matching gap between the side wall of the slider 4 and the inner wall of the correction hole 31, the better, as long as the slider 4 can be inserted into the correction hole 31 and can be moved out of the correction hole 31.

[0045] Please refer to Figure 3The positioning block 2 is directly or indirectly fixed on the side wall of the slider 4 near the end: the direct connection method refers to fixing the positioning block 2 directly on the side wall of the slider 4; the indirect connection method refers to fixing the adapter block 15 on the side wall of the slider 4, and fixing the positioning block 2 on the adapter block 15. The two positioning blocks 2 are also symmetrically arranged on both sides of the first cushion block 1, and the two positioning blocks 2 are also symmetrical about the correction block 3; the plate 101 is suitable for being clamped between the positioning block 2 and the first cushion block 1, and the positioning block 2 is protruded toward the side of the first cushion block 1 and is provided with a protrusion 23 (see Figure 4 ), the protrusion 23 is suitable for plugging and matching with the hole on the plate 101.

[0046] The above-mentioned automobile sheet metal welding tooling uses the guide block 5 to initially limit the slider 4, and then uses the correction block 3 to correct the end position of the slider 4, so as to avoid the end position deviation of the slider 4 caused by factors such as the uneven surface of the slider 4, the uneven inner wall of the guide hole 51 of the guide block 5, and the matching clearance between the slider 4 and the guide block 5 allowing the slider 4 to deviate, so that the end of the slider 4 is located at the accurate position, and the positioning block 2 is fixed to the slider 4 near the end, which also ensures that the positioning block 2 is in the accurate position, so as to achieve the effect of ensuring the accurate insertion and matching of the protrusion 23 and the hole even if a cylinder is used as a driver.

[0047] Please refer to Figure 3 Furthermore, the above-mentioned automobile sheet metal welding tooling also includes a second pad 7 and a second cylinder 8; the second pad 7 is fixed on the platform and is located below the sheet metal 100, and the upper surface of the second pad 7 is in contact with the downward surface of the sheet metal 100.

[0048] The piston rod of the second cylinder 8 is connected to a pressing plate 9, which can be pressed on the upward surface of the sheet metal 100 when driven by the piston rod; specifically, the piston rod of the second cylinder 8 is pivoted to the end of the pressing plate 9 away from the sheet metal 100, and the portion of the pressing plate 9 between the sheet metal 100 and the piston rod is pivoted to the second cushion block 7, and all the pivot axes 10 on the pressing plate 9 are parallel. The pressing plate 9 is hinged by the second cylinder 8, and the pressing plate 9 is also hinged to the second cushion block 7, so that the function of driving the pressing plate 9 to rotate and press the second cushion block 7 or lifting the pressing plate 9 from the second cushion block 7 is realized. The second cushion block 7 is used to support the bottom of the sheet metal 100, and the sheet metal 100 is pressed on the second cushion block 7 in cooperation with the pressing plate 9, so that the sheet metal 100 can be prevented from moving in the vertical direction.

[0049] Please refer to Figure 5 The second cushion block 7 is provided with an embedding groove 71, in which a removable embedding block 72 is embedded, and a plug block 73 protrudes from the top of the embedding block 72 and is plugged into and matched with the notch on the sheet metal part 100. By embedding the removable embedding block 72 in the embedding groove 71 of the second cushion block 7, the notches of different shapes and sizes on various sheet metal parts 100 can be adapted by replacing the embedding block 72.

[0050] Please refer to Figure 3 Furthermore, the above-mentioned automobile sheet metal welding tooling also includes a third cylinder 13 and a limiting column 14 fixed on the platform, the limiting column 14 is provided with a limiting hole 141, the piston rod of the third cylinder 13 is slidably matched with the limiting hole 141, the piston rod of the third cylinder 13 points to the sheet metal 100 and the end of the piston rod is provided with a protrusion 131, and the protrusion 131 is suitable for plugging and matching with the through hole on the vertical plate at the edge of the sheet metal 100. The limiting hole 141 on the limiting column 14 is used to guide and limit the piston rod of the third cylinder 13, so as to achieve precise plugging and matching between the piston rod and the through hole on the vertical plate at the edge of the sheet metal 100.

[0051] Please refer to Figure 4 Furthermore, a mounting hole 21 is provided on the surface of the positioning block 2 facing the plate 101, and the profile of the mounting hole 21 is the same as the profile of the hole position on the plate 101, and a protrusion 23 is provided in the mounting hole 21. By designing the positioning block 2 and the protrusion 23 to be detachable and split, the protrusion 23 of the corresponding shape can be replaced according to the shape of the hole position on the plate 101, without having to replace the positioning block 2 as a whole, thereby reducing the processing cost and improving the processing efficiency.

[0052] Please refer to Figure 6 and Figure 7 The first cushion block 1 includes a thicker middle body 11 and a thinner side body 12. The side body 12 is detachably connected to the opposite sides of the middle body 11. The plate 101 is suitable for being sandwiched between the side body 12 and the positioning block 2. The protrusion 23 passes through the plate 101, and a hole 121 for accommodating the protrusion is provided on the side. The positioning block 2 is provided with a stud hole 22 connected to the mounting hole 21. A stud is arranged in the stud hole 22, and the stud is connected to the protrusion 23 by a thread. By designing the first cushion block 1 as a detachable combination of the thicker middle body 11 and the thinner side body 12, when the hole size on the plate 101 changes, resulting in the size of the protrusion 23 being larger than the size of the hole 121 on the side body 12, so that the hole 121 cannot accommodate the protrusion 23, the problem can be solved by replacing only the side body 12, without replacing the first cushion block 1 as a whole, thereby reducing the processing cost and improving the processing efficiency.

[0053] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A welding tool for automobile sheet metal parts, characterized in that: include: The first pad is fixed in position, located between the two plates, and abuts against the opposite surfaces of the two plates; Positioning blocks are symmetrically arranged on both sides of the first cushion block, the plate is suitable for being clamped between the positioning blocks and the first cushion block, and the positioning blocks are provided with protrusions suitable for plugging and matching with the holes on the plate; A deflection correction block, which is fixed in position and has deflection correction holes; Slide blocks are symmetrically arranged on both sides of the deviation-correcting block, with ends thereof being adapted to be plugged into and matched with the deviation-correcting holes, and being fixedly connected to the positioning block near the end; The guide blocks are symmetrically arranged on both sides of the deviation-correcting block and have guide holes, and the sliders are slidably fitted in the guide holes; The first cylinder is fixed in position, and its piston rod is connected to the sliding block.

2. The automobile sheet metal welding tool according to claim 1, characterized in that: It also includes a second pad which is fixed in position and located below the sheet metal component, wherein the upper surface of the second pad is in contact with the downward surface of the sheet metal component.

3. The automobile sheet metal welding tool according to claim 2, characterized in that: It also includes a second cylinder, whose piston rod is connected to a pressure plate, and the pressure plate is suitable for pressing on the upward surface of the sheet metal part.

4. The automobile sheet metal welding tool according to claim 3, characterized in that: The piston rod of the second cylinder is pivotally connected to one end of the pressure plate away from the sheet metal component, the portion of the pressure plate located between the sheet metal component and the piston rod is pivotally connected to the second cushion block, and all pivot axes on the pressure plate are parallel.

5. The automobile sheet metal welding tool according to claim 3, characterized in that: The second cushion block is provided with an embedding groove in which a removable embedding block is embedded. An insert block protrudes from the top of the embedding block and is plugged and matched with the notch on the sheet metal part.

6. The automobile sheet metal welding tool according to claim 3, characterized in that: It also includes a third cylinder and a limit column with a fixed position, the limit column is provided with a limit hole, the piston rod of the third cylinder is slidably matched with the limit hole, the piston rod of the third cylinder points to the sheet metal part and a protrusion is provided at the end of the piston rod, and the protrusion is suitable for plugging and matching with the through hole on the vertical plate at the edge of the sheet metal part.

7. The automobile sheet metal welding tool according to any one of claims 1 to 6, characterized in that: The deflection-correcting block is fixed on the first cushion block, and the two positioning blocks are also symmetrical with respect to the deflection-correcting block.

8. The automobile sheet metal welding tool according to any one of claims 1 to 6, characterized in that: A mounting hole is provided on the surface of the positioning block facing the plate, the contour of the mounting hole is the same as the contour of the hole position on the plate, and the protrusion is matched in the mounting hole.

9. The automobile sheet metal welding tool according to claim 8, characterized in that: The first cushion block includes a thicker middle body and a thinner side body, the side bodies are detachably connected to the opposite sides of the middle body, the plate is suitable for being clamped between the side bodies and the positioning block, the protrusion passes through the plate, and the side bodies are provided with holes for accommodating the protrusion.

10. The automobile sheet metal welding tool according to claim 8, characterized in that: The positioning block is provided with a stud hole connected to the mounting hole, a stud is arranged in the stud hole, and the stud is connected to the protruding portion through a thread.

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