Welding tool for assisting assembly of special-shaped workpieces

Abstract

The utility model relates to the technical field of friction stir welding, in particular to a welding tool for assisting in assembling special-shaped workpieces, which comprises an assembling bottom plate, a supporting column and a clamping device, the supporting column and the clamping device are mounted on the assembling bottom plate, the assembling bottom plate is mounted on a working platform of friction stir welding equipment, an auxiliary table is arranged at the top of the supporting column, and the clamping device is mounted on the supporting column. An assembling platform is formed and is used for assisting in supporting and fixing the special-shaped workpiece; the multiple clamping devices are installed on the assembling bottom plate on the periphery of the auxiliary table, so that the baffle assemblies installed at the driving ends of the clamping devices can conduct releasable clamping operation on the side wall of the special-shaped workpiece fixed to the auxiliary table. In conclusion, by means of the collaborative design of the supporting protruding column, the multi-direction baffle and the inclined wedge clamping, the fixing problem of the special-shaped workpiece in the friction stir welding process is solved, high stability, operation convenience and process adaptability are achieved, and the production efficiency and the yield can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of friction stir welding, especially to a welding tool for assisting the assembly of special-shaped workpieces. BACKGROUND

[0002] In the production process of friction stir welding, the traditional fixing clamp or assembly tool has obvious deficiencies in the fixed assembly of special-shaped workpieces.

[0003] It can be seen that the fixing of special-shaped workpieces (such as workpieces with irregular grooves or inclined side walls at the bottom) has significant technical difficulties. The traditional clamp or tool cannot adapt to the complex geometry of special-shaped workpieces, which may lead to the following problems:

[0004] Insufficient support: the bottom of the special-shaped workpiece is uneven, and the side wall between the grooves is weak. The traditional planar support may cause deformation or deviation of the workpiece under welding pressure.

[0005] Clamping failure: the inclined side wall or asymmetric structure of the special-shaped workpiece makes it difficult for the conventional baffle to apply uniform force, and stress concentration or unstable fixation may occur during clamping.

[0006] Positioning deviation: the lack of positioning structure matching the special-shaped groove of the workpiece may cause misalignment during assembly, affecting the welding precision and yield.

[0007] Due to the irregular shape of the special-shaped workpiece, the traditional tool cannot accurately fit, which may cause unstable fixation during welding. This not only affects the stability of welding, but also may result in substandard welding quality, which cannot meet the production process requirements, and thus reduces the yield of workpieces. Therefore, it is urgent to improve the assembly and welding tool for special-shaped workpieces. INVENTION CONTENTS

[0008] The utility model aims to provide a technical solution to solve the above problems.

[0009] The utility model provides a welding tool for assisting the assembly of special-shaped workpieces, which comprises an assembly base plate, a support column and a clamping device installed on the assembly base plate. The assembly base plate is installed on the workbench of a friction stir welding device. The top of the support column is provided with an auxiliary table, which forms an assembly platform for assisting the support and fixation of special-shaped workpieces. A plurality of clamping devices are installed on the assembly base plate around the auxiliary table. The baffle assembly installed on the driving end of the clamping device can perform releasable clamping operation on the side wall of the special-shaped workpiece fixed on the auxiliary table.

[0010] Further, the top of the auxiliary table is provided with a plurality of support columns, which are embedded in the special-shaped grooves at the bottom of the special-shaped workpiece, thereby forming stable support for the special-shaped workpiece.

[0011] Further, the cross-sectional area of the support convex column is smaller than the cross-sectional area of the special-shaped groove.

[0012] Further, the side wall of the special-shaped groove at the side edge of the special-shaped workpiece is bent at a certain angle away from the special-shaped workpiece to form an inclined side wall; the support convex column corresponding to the inclined side wall is provided with a support inclined surface, so that the support inclined surface abuts against the inner side of the inclined side wall of the special-shaped groove to form a support effect.

[0013] Further, the baffle assembly is provided with a short-side baffle, which is mounted on the driving end of the clamping device and can abut against the side wall where the short side of the special-shaped workpiece is located.

[0014] Further, the baffle assembly is provided with a long-side baffle, which is mounted on the driving end of the clamping device and can abut against the side wall where the long side of the special-shaped workpiece is located.

[0015] Further, the two ends of the long-side baffle are respectively mounted on the driving ends of the two groups of clamping devices.

[0016] Further, the baffle assembly is provided with a first baffle, which is provided with a resisting inclined surface on the side facing the inclined side wall, and the resisting inclined surface can abut against the inclined side wall to form a clamping operation on the inclined side wall.

[0017] Further, the clamping device is provided with a clamping frame, a driving slider, a passive slider and a clamping cylinder, the clamping frame and the clamping cylinder are respectively mounted on the assembly base plate, the driving slider is slidably connected to the clamping frame in the axial direction parallel to the piston rod of the clamping cylinder, the passive slider is slidably connected to the clamping frame in the axial direction perpendicular to the piston rod of the clamping cylinder, one end of the driving slider is drivingly connected to the piston end of the clamping cylinder, and the other end of the driving slider is provided with an inclined guide rail, the passive slider is provided with an inclined guide groove corresponding to the inclined guide rail, the inclined guide groove and the inclined guide rail are matched with each other to form a driving connection, and the baffle assembly is fixedly connected to the end of the passive slider away from the inclined guide groove.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] 1. Stable support and fixation: the utility model forms an assembly platform with a specific height by arranging a special-shaped auxiliary table on the assembly base plate, which can perfectly fit the special-shaped workpiece to support and fix it from the bottom. Meanwhile, the support convex columns arranged on the top of the auxiliary table can be embedded into the special-shaped grooves at the bottom of the special-shaped workpiece, and the plurality of support convex columns and the plurality of special-shaped grooves are matched with each other to further enhance the stable support of the special-shaped workpiece.

[0020] 2. Reliable clamping: the clamping device is installed at the corresponding position of the assembly base plate around the auxiliary table, the drive end of the clamping device is provided with a baffle assembly including a short side baffle, a long side baffle and a first baffle, and the side wall of the special-shaped workpiece can be abutted and clamped. The corresponding baffle is designed according to different side edges and special structures (such as inclined side wall) of the special-shaped workpiece, so that the special-shaped workpiece is stably clamped on the auxiliary table to form a rigid fixation, and displacement of the workpiece during friction stir welding is prevented, the stability of welding is greatly enhanced, and the yield of the workpiece is improved.

[0021] 3. Precise driving and balancing: the clamping device adopts a unique structural design, and is provided with a clamping frame, a driving slider, a passive slider and a clamping cylinder, and a wedge mechanism is formed by cooperation of the oblique guide groove and the oblique guide rail. The clamping cylinder drives the driving slider to convert the vertical movement of the driving slider into the horizontal movement of the passive slider, so as to drive the baffle assembly to realize the extension and retraction movement, and the abutment or release operation of the special-shaped workpiece is accurately completed. For the long side baffle and the first baffle, the two ends are respectively driven by two groups of clamping devices, so that the balance and stability of abutment are ensured, and the rigid fixation effect of the special-shaped workpiece is optimized.

[0022] Through the above improvement, the utility model solves the fixation problem of the special-shaped workpiece in the friction stir welding through the collaborative design of "supporting convex column + multi-direction baffle + wedge clamping", and has high stability, convenient operation and process adaptability, and can improve the production efficiency and yield.

[0023] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0025] Figure 1 It is the structure schematic view of the baffle assembly and the clamping device of the utility model;

[0026] Figure 2 It is the structure schematic view of the special-shaped workpiece and the short side baffle of the utility model;

[0027] Figure 3 It is the structure schematic view of the special-shaped workpiece and the long side baffle of the utility model;

[0028] Figure 4is a cross section schematic view of the support convex column and the special-shaped workpiece of the utility model;

[0029] Figure 5 is a cross section schematic view of the resisting bevel and the inclined side wall in a separated state;

[0030] Figure 6 is a structural schematic view of the special-shaped workpiece and the support convex column in a separated state;

[0031] Figure 7 is a structural schematic view of the clamping device.

[0032] The reference signs and names in the drawing are as follows:

[0033] 10 assembly base plate, 11 support column, 12 auxiliary table, 13 support convex column, 14 support bevel, 20 clamping device, 21 clamping frame, 22 active sliding block, 23 inclined guide rail, 24 passive sliding block, 25 inclined guide groove, 26 clamping cylinder, 30 baffle assembly, 31 short side baffle, 32 long side baffle, 33 first baffle, 34 resisting bevel, 40 special-shaped workpiece, 41 special-shaped groove, 42 inclined side wall. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] Please refer to Figures 1 to 7 In the embodiments of the utility model, a welding tool for assisting special-shaped workpieces in assembly comprises an assembly base plate 10, a support column 11 and a clamping device 20 installed on the assembly base plate 10, the assembly base plate 10 is installed on the operation platform of a friction stir welding device, the top of the support column 11 is provided with an auxiliary table 12 and forms an assembly platform for assisting the support and fixation of the special-shaped workpiece 40, a plurality of clamping devices 20 are installed on the assembly base plate 10 around the auxiliary table 12, so that the baffle assembly 30 installed on the driving end of the clamping device 20 can releaseably clamp the side wall of the special-shaped workpiece 40 fixed on the auxiliary table 12.

[0036] Specifically, in the operation and production process of friction stir welding, the traditional fixation clamp or assembly tool cannot well fix some special-shaped workpieces 40, and the fixation is prone to being not firm in the welding process, so it is necessary to improve.

[0037] The utility model discloses a special-shaped workpiece 40 is formed stable support and fixed through the special-shaped auxiliary platform 12 of setting up on the assembly bottom plate 10, and the special-shaped workpiece 40 is fixed on the auxiliary platform 12 through the clamping device 20 of installing on the assembly bottom plate 10 of the four around of auxiliary platform 12, and the stability of welding is enhanced, the good rate of workpiece is improved, and the problem of welding not meeting the production technology is prevented.

[0038] Secondly, the auxiliary platform 12 is used as the assembly platform with certain height, and the special-shaped workpiece 40 is assembled, supported and fixed from the bottom of the special-shaped workpiece 40, then the multiple clamping devices 20 around are driven to drive the corresponding baffle assembly 30 to abut against the sidewall of the special-shaped workpiece 40 releasably, so that the special-shaped workpiece 40 is clamped and fixed on the auxiliary platform 12, and waits for the top of the special-shaped workpiece 40 to be welded by the friction stir welding equipment.

[0039] As shown in Figures 4 to 6 Preferably, the top of the auxiliary platform 12 is provided with multiple support convex columns 13, which are used to be embedded in the special-shaped grooves 41 at the bottom of the special-shaped workpiece 40, so as to form stable support for the special-shaped workpiece 40.

[0040] Specifically, the bottom of the special-shaped workpiece 40 is uneven, and multiple special-shaped grooves 41 are formed, and the sidewall between the special-shaped grooves 41 is thin and cannot bear the pressure applied by the friction stir welding, so preferably, the support convex columns 13 corresponding to the special-shaped grooves 41 are arranged on the top of the auxiliary platform 12, so that when the special-shaped workpiece 40 is placed on the auxiliary platform 12, the special-shaped grooves 41 are just sleeved on the support convex columns 13, the support convex columns 13 can be embedded in the special-shaped grooves 41, and the top end of the support convex columns 13 abuts against the bottom of the special-shaped grooves 41, so that the multiple support convex columns 13 and the multiple special-shaped grooves 41 support each other to stably support and fix the special-shaped workpiece 40.

[0041] As shown in Figure 4 and Figure 5 Preferably, the cross-sectional area of the support convex column 13 is smaller than the cross-sectional area of the special-shaped groove 41.

[0042] Specifically, since the side wall of one side of the special-shaped groove 41 has a certain inclination angle, in order to facilitate the insertion of the supporting column 13 into the bottom of the special-shaped groove 41, the size of the supporting column 13 is preferably smaller than that of the special-shaped groove 41, for example, the cross-sectional area of the supporting column 13 is smaller than that of the special-shaped groove 41, so that the special-shaped workpiece 40 can be smoothly placed on the auxiliary table 12, and the supporting column 13 is inserted into the bottom of the special-shaped groove 41 to form support.

[0043] As shown in Figures 3 to 6 , preferably, the side wall of the special-shaped groove 41 located at one side edge of the special-shaped workpiece 40 is bent at a certain angle away from the special-shaped workpiece 40 to form an inclined side wall 42; the supporting column 13 corresponding to the inclined side wall 42 is provided with a supporting inclined surface 14, so that the supporting inclined surface 14 abuts against the inner side of the inclined side wall 42 of the special-shaped groove 41 to form a supporting effect.

[0044] Specifically, since the special-shaped groove 41 on one side of the special-shaped workpiece 40 has an inclined side wall 42 protruding from the main body of the special-shaped workpiece 40, in order to support the inclined side wall 42 obliquely, the supporting column 13 corresponding to the inclined side wall 42 is preferably provided with a supporting inclined surface 14 at the top of the supporting column 13, so that the supporting inclined surface 14 is aligned with the inclined side wall 42, thereby better supporting and fixing the inclined side wall 42.

[0045] As shown in Figure 1 and Figure 2 , preferably, the baffle assembly 30 is provided with a short side baffle 31, which is installed on the driving end of the clamping device 20, so as to abut on the side wall where the short side of the special-shaped workpiece 40 is located.

[0046] Specifically, at the side wall where the short side of the special-shaped workpiece 40 is located, the short side baffle 31 needs to be provided to abut and clamp it, so that on both sides of the short side of the special-shaped workpiece 40, two sets of clamping devices 20 are respectively installed corresponding to the positions of the assembly base plate 10, and the driving ends of the two sets of clamping devices 20 are respectively provided with short side baffles 31, so that the clamping device 20 can drive the short side baffle 31 to move a certain distance towards the special-shaped workpiece 40, thereby abutting on the side wall where the short side of the special-shaped workpiece 40 is located, and then fixing and clamping the side wall where the short side of the special-shaped workpiece 40 is located.

[0047] As shown in Figure 1 and Figure 3 , preferably, the baffle assembly 30 is provided with a long side baffle 32, which is installed on the driving end of the clamping device 20, so as to abut on the side wall where the long side of the special-shaped workpiece 40 is located.

[0048] Specifically, the long side of the workpiece 40 is located on the side wall, and the long side baffle 32 needs to be arranged on both sides of the long side of the workpiece 40 to abut and clamp, so on both sides of the long side of the workpiece 40, corresponding to the position of the assembly base plate 10, two sets of clamping devices 20 are also respectively installed, and the driving end of the two sets of clamping devices 20 is respectively provided with a long side baffle 32, so that the clamping device 20 can drive the long side baffle 32 to move a certain distance towards the workpiece 40, thereby abutting on the side wall where the long side of the workpiece 40 is located, and then fixing and clamping the side wall where the long side of the workpiece 40 is located.

[0049] As shown in Figure 1 and Figure 3 Preferably, both ends of the long side baffle 32 are respectively installed on the driving end of the two sets of clamping devices 20.

[0050] Specifically, since the length of the long side baffle 32 is significantly greater than that of the short side baffle 31, the specific length is designed according to the size of the long side of the workpiece 40. When the longer long side baffle 32 abuts on the side wall where the long side of the workpiece 40 is located, if a set of clamping devices 20 is used for driving, the two ends may be offset, resulting in inconsistent abutting distance or abutting force, which affects the stable assembly of the workpiece 40. Therefore, preferably, two sets of clamping devices 20 are arranged at both ends of the long side baffle 32, so that the two ends of the long side baffle 32 are fixed on the power output end of the two sets of clamping devices 20, so that the two sets of clamping devices 20 can synchronously drive the two ends of the long side baffle 32, so that the clamping operation of the long side baffle 32 on the workpiece 40 is more balanced and stable, and the rigid fixation of the workpiece 40 is optimized.

[0051] As shown in Figures 3 to 5 Preferably, the baffle assembly 30 is provided with a first baffle 33, and the side of the first baffle 33 facing the inclined side wall 42 is provided with an abutting inclined surface 34, which can abut on the inclined side wall 42 to form a clamping operation on the inclined side wall 42.

[0052] Specifically, in order to better abut and clamp the inclined side wall 42 of the workpiece 40, preferably, according to the shape and inclination angle of the inclined side wall 42, the abutting inclined surface 34 is arranged on the corresponding side of the first baffle 33, so that when the first baffle 33 is clamped by the clamping device 20, the abutting inclined surface 34 corresponds to the inclined side wall 42, forming a clamping state that fits each other, so that the workpiece 40 is stably and rigidly fixed on the auxiliary table 12, facilitating the subsequent friction stir welding operation.

[0053] Secondly, the first baffle 33 is similar to the long-side baffle 32, with both ends installed on two sets of clamping devices 20 to abut against the side wall where the long side of the irregular workpiece 40 is located. The difference is that the first baffle 33 is specially designed for the inclined side wall 42 of the irregular workpiece 40. It has a retaining inclined surface 34 on the side facing the inclined side wall 42 to achieve effective clamping of the inclined side wall 42, making the abutment between the retaining inclined surface 34 and the inclined side wall 42 more perfect and easy to form a good rigid fixation.

[0054] Furthermore, it is understandable that when the sidewall where the short side of the irregular workpiece 40 is located also has an inclined sidewall 42, the short side baffle 31 can also be provided with a corresponding abutting inclined surface 34 according to the same principle as the first baffle 33, so as to clamp the inclined sidewall 42 where the short side of the irregular workpiece 40 is located. Correspondingly, the supporting protrusion 13 is also provided with a corresponding supporting inclined surface 14 at the position where the short side of the irregular workpiece 40 is located, so as to provide auxiliary support for the inclined sidewall 42.

[0055] like Figure 1 and Figure 7 As shown, preferably, the clamping device 20 includes a clamping frame 21, an active slider 22, a passive slider 24, and a clamping cylinder 26. The clamping frame 21 and the clamping cylinder 26 are respectively mounted on the mounting base plate 10. The active slider 22 is slidably connected to the clamping frame 21 along a direction parallel to the axial direction of the piston rod of the clamping cylinder 26. The passive slider 24 is slidably connected to the clamping frame 21 along a direction perpendicular to the axial direction of the piston rod of the clamping cylinder 26. One end of the active slider 22 is drivenly connected to the piston end of the clamping cylinder 26, and the other end is provided with an inclined guide rail 23. The passive slider 24 is provided with an inclined guide groove 25 corresponding to the inclined guide rail 23. The inclined guide groove 25 and the inclined guide rail 23 cooperate with each other to form a drive connection. The baffle assembly 30 is fixedly connected to the end of the passive slider 24 away from the inclined guide groove 25.

[0056] Specifically, the clamping frame 21 is fixedly installed on the upper part of the assembly base plate 10, corresponding to the usage position of the baffle assembly 30. The clamping cylinder 26 is preferably installed on the assembly base plate 10, corresponding to the lower position of the clamping frame 21, so that the piston rod of the clamping cylinder 26 can be driven to the active slider 22, driving the active slider 22 to move vertically. The active slider 22 and the passive slider 24 cooperate to form a transmission connection. The vertical movement of the active slider 22 can drive the passive slider 24 to move horizontally, thereby driving the baffle assembly 30 to abut against the side wall of the irregularly shaped workpiece 40, thus achieving rigid fixation.

[0057] Secondly, the oblique guide groove 25 and the oblique guide rail 23 form a wedge mechanism by matching with each other, one end of the driving slider 22 is drivingly connected to the piston end of the clamping cylinder 26, and the vertical movement is transmitted to the horizontal movement of the passive slider 24 through the matching of the oblique guide groove 25 and the oblique guide rail 23, so that the passive slider 24 can change the distance relative to the clamping frame 21, realize the telescopic movement to a certain extent, and drive the baffle assembly 30 to abut or release the special-shaped workpiece 40.

[0058] Thirdly, the clamping device 20 drives the driving slider 22 through the clamping cylinder 26, and converts the vertical movement of the driving slider 22 into the horizontal movement of the passive slider 24 through the wedge mechanism, so as to drive the baffle assembly 30 to realize the telescopic movement and complete the abutting or releasing operation of the special-shaped workpiece 40.

[0059] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A welding fixture for assisting in the assembly of a profiled workpiece, characterised in that, The utility model provides a kind of auxiliary support device for special-shaped workpiece, including assembly base plate (10), and install support column (11) and clamping device (20) in assembly base plate (10), the assembly base plate (10) is installed in the operation platform of friction stir welding equipment, the top of the support column (11) is equipped with auxiliary table (12), and forms assembly platform, for the support and fixed of auxiliary special-shaped workpiece (40);Multiple clamping devices (20) are respectively installed in assembly base plate (10) around auxiliary table (12), so that the baffle assembly (30) installed in the driving end of clamping device (20) can be released to the side wall of special-shaped workpiece (40) fixed in auxiliary table (12) Clamping operation.

2. The welding fixture of claim 1, wherein, The top of the auxiliary table (12) is provided with a plurality of support convex columns (13), which are embedded in the special-shaped recess (41) at the bottom of the special-shaped workpiece (40), thereby forming stable support for the special-shaped workpiece (40).

3. The welding fixture of claim 2, wherein, The cross-sectional area of the support convex column (13) is smaller than the cross-sectional area of the special-shaped recess (41).

4. The welding fixture of claim 2, wherein, The side wall of the special-shaped recess (41) at one side edge of the special-shaped workpiece (40) is bent at a certain angle away from the special-shaped workpiece (40), forming an inclined side wall (42); the support convex column (13) corresponding to the inclined side wall (42) is provided with a support inclined surface (14), so that the support inclined surface (14) abuts the inner side of the inclined side wall (42) of the special-shaped recess (41), forming a support effect.

5. The welding fixture of claim 1, wherein, The baffle assembly (30) is provided with a short side baffle (31), which is installed at the driving end of the clamping device (20), so as to be detachably abutted on the side wall where the short side of the special-shaped workpiece (40) is located.

6. The welding fixture of claim 1, wherein, The baffle assembly (30) is provided with a long side baffle (32), which is installed at the driving end of the clamping device (20), so as to be detachably abutted on the side wall where the long side of the special-shaped workpiece (40) is located.

7. The welding fixture of claim 6, wherein, The two ends of the long side baffle (32) are respectively installed at the driving end of two groups of clamping devices (20).

8. The welding fixture of claim 4, wherein, The baffle assembly (30) is provided with a first baffle (33), which is provided with a resisting inclined surface (34) on the side facing the inclined side wall (42), which is detachably abutted on the inclined side wall (42), thereby forming clamping operation on the inclined side wall (42).

9. The welding fixture of claim 1, wherein, The clamping device (20) is provided with a clamping frame (21), a driving slider (22), a passive slider (24) and a clamping cylinder (26), the clamping frame (21) and the clamping cylinder (26) are respectively installed on the assembly bottom plate (10), the driving slider (22) is slidably connected to the clamping frame (21) along the axial direction parallel to the piston rod of the clamping cylinder (26), the passive slider (24) is slidably connected to the clamping frame (21) along the axial direction perpendicular to the piston rod of the clamping cylinder (26), one end of the driving slider (22) is drivingly connected to the piston end of the clamping cylinder (26), the other end of the driving slider (22) is provided with an inclined guide rail (23), the part corresponding to the inclined guide rail (23) of the passive slider (24) is provided with an inclined guide groove (25), the inclined guide groove (25) and the inclined guide rail (23) are matched with each other to form a driving connection, and the baffle assembly (30) is fixedly connected to one end of the passive slider (24) away from the inclined guide groove (25).

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