Welding clamping tool

Abstract

The utility model relates to the technical field of workpiece clamping, in particular to a welding clamping tool which comprises an installation base, a lifting mechanism and a pressing arm. A positioning column is arranged on the mounting base, the metal plate shell is placed on the mounting base, and the positioning column is coaxially sleeved with a through hole in the metal plate shell; the lifting mechanism is distributed on one side of the mounting base, one end of the pressing arm is connected with the lifting mechanism, the other end of the pressing arm is arranged above the mounting base, the pressing arm is provided with a first position close to the mounting base and a second position away from the mounting base, and the lifting mechanism can drive the pressing arm to be located at the first position or the second position; an inserting rod coaxial with the positioning column is arranged at the other end of the pressing arm, and a tight supporting structure capable of elastically moving in the radial direction is arranged on the inserting rod; the inserting rod sequentially penetrates through the nut box and the nut, and the nut is fixed to the inserting rod through the tight supporting structure. When the pressing arm is at the first position, the inserting rod is close to the positioning column, and the nut box clings to the sheet metal shell; when the pressing arm is located at the second position, the nut box and the nut can be arranged on the inserting rod in a sleeving mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to workpiece clamping technical field especially relates to a welding clamping frock. BACKGROUND

[0002] The nut box assembly is applied to the installation accessories of each position of the automobile, and is generally composed of a sheet metal shell A, a nut B and a nut box C as shown in the drawings. Figure 1 In production, the nut is placed on the designated hole position of the sheet metal shell, and after the nut box is closed, the nut box needs to be welded with the sheet metal shell to realize assembly; in order to ensure the welding effect of the nut box and the sheet metal shell, the nut box needs to be pressed by a pressing arm, and the nut box also needs to be placed at the hole position of the sheet metal shell at a specified angle during welding, so manual adjustment is needed before the pressing arm presses the nut box, and the manual adjustment method cannot ensure the accuracy of the nut box welding angle, and the manual adjustment method leads to low production efficiency. SUMMARY

[0003] Therefore, the utility model provides a welding clamping frock for solving one of the problems in the prior art.

[0004] To achieve one or part or all of the above purposes or other purposes, the utility model provides:

[0005] A welding clamping frock is used for clamping a nut, a nut box and pressing on a sheet metal shell, and the welding clamping frock comprises an installation base, a lifting mechanism and a pressing arm.

[0006] A positioning column is arranged on the installation base, the sheet metal shell is placed on the installation base, and a through hole on the sheet metal shell is coaxially sleeved on the positioning column.

[0007] The lifting mechanism is arranged on one side of the installation base, one end of the pressing arm is connected to the lifting mechanism, and the other end of the pressing arm is arranged above the installation base.

[0008] The other end of the pressing arm is provided with a plug rod coaxial with the positioning column, and the plug rod is provided with a tensioning structure capable of moving radially elastically.

[0009] When the pressing arm is in the first position, the plug rod is close to the positioning column, and the nut box is tightly attached to the sheet metal shell.

[0010] Further, the supporting structure comprises a mounting pipe and a wave bead arranged on the mounting pipe, an inner side of the wave bead is provided with a spring, and an outer side of the wave bead is used for contacting an inner wall of the nut.

[0011] Further, a radially extending assembly hole is arranged on the inserting rod, the mounting pipe is threadedly connected in the assembly hole, and one end of the mounting pipe provided with the wave bead extends out of the inserting rod.

[0012] Further, the other end of the pressing arm is provided with a positioning member, the positioning member is arranged on one side of the inserting rod, and a positioning groove is arranged on one side wall of the inserting rod towards the positioning member, after the nut and the nut box are sleeved on the inserting rod, any side wall of the nut box can be embedded in the positioning groove.

[0013] Further, the other end of the pressing arm is provided with a pressing wall, the inserting rod is perpendicular to the pressing wall, when the pressing arm is in the first position, the pressing wall presses the nut box against the top wall of the nut box to press the nut box against the metal shell.

[0014] Further, the lifting mechanism comprises an L-shaped base and a connecting table, the L-shaped base is provided with a sliding rail, the connecting table is provided with a sliding table connected with the sliding rail, and the connecting table is further provided with a mounting plate used for connecting the pressing arm.

[0015] Further, the lifting mechanism further comprises a gas cylinder, and the connecting table is provided with an extension rod connected with a telescopic rod of the gas cylinder.

[0016] Further, the connecting table is further provided with a handle.

[0017] Further, the pressing arm is an L-shaped rod, the pressing arm comprises an installation rod and a pressing rod connected with each other, the installation rod is fixedly connected with the mounting plate, and the inserting rods are arranged at end portions of the pressing rod.

[0018] Further, the positioning column, the lifting mechanism and the pressing arm are at least provided with two.

[0019] The embodiment of the utility model has the following beneficial effects:

[0020] After the above scheme is adopted, the mounting base with the positioning column is used for placing the metal shell, the position control of the nut and the nut box is realized through the pressing arm with the first position and the second position, the inserting rod coaxial with the positioning column is used to stably clamp the nut and the nut box, and it is ensured that the nut and the nut box are pressed against the metal shell at a preset angle for welding, manual adjustment of the angle of the nut box in the narrow space of the metal shell is not needed before the nut box is pressed by the pressing arm, work efficiency is improved, and the welding angle of the nut box is accurate, in addition, the inserting rod adopts the supporting structure to clamp from the inner hole of the nut, reasonable space structure distribution effectively improves the welding efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the object workpiece nut box assembly in this embodiment;

[0023] Figure 2 The overall structure of the welding clamping fixture in this embodiment Figure 1 ;

[0024] Figure 3 The overall structure of the welding clamping fixture in this embodiment Figure 2 ;

[0025] Figure 4 This is an overall structural diagram of the pressure arm in this embodiment;

[0026] Figure 5 This is a schematic diagram of the separation of the pressure arm in this embodiment;

[0027] Figure 6 This is a schematic diagram showing the state of the pressure arm holding the nut and the nut box in this embodiment;

[0028] Figure label:

[0029] A. Sheet metal casing; B. Nut; C. Nut box;

[0030] 1. Mounting base; 10. Positioning posts;

[0031] 2. Lifting mechanism; 20. L-shaped base; 200. Slide rail; 21. Connecting platform; 210. Slide table; 211. Extension rod; 212. Mounting plate; 213. Handle; 22. Cylinder;

[0032] 3. Pressure arm; 30. Insert rod; 300. Assembly hole; 31. Tensioning structure; 310. Ball bearing; 311. Mounting tube; 32. Mounting rod; 33. Lower pressure rod; 330. Pressing wall; 34. Positioning component; 340. Positioning groove; 4. Welding tooling platform. Detailed Implementation

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the application is well suited to conform to a wide variety of embodiments and alternatives to the embodiments described herein will be readily apparent to those of ordinary skill in the art, and the use of a term in the specification or claims from one particular embodiment to another is not intended to limit the scope of the application unless otherwise specifically stated so. It is intended that the application not be limited to the particular embodiments disclosed in the specification, but it is intended to cover modifications or equivalents of the embodiments which come within the scope of the application. The present application includes all modifications and alternatives falling within the scope of the claims.

[0034] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is expressly understood that the embodiments described herein are merely examples from a multitude of embodiments that are of the application. Numerous modifications and permutations from the described embodiments are possible within the scope of the application.

[0035] In order to make the technical personnel of the present technology better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings.

[0036] Referring to the drawings Figure 1 - the drawings Figure 6 The embodiment discloses a welding clamping tool for clamping a nut B, a nut box C and pressing on a sheet metal shell A, which comprises a mounting base 1, a lifting mechanism 2 and a pressing arm 3. The mounting base 1 is provided with a positioning column 10, the sheet metal shell A is placed on the mounting base 1, and the through hole on the sheet metal shell A is coaxially sleeved on the positioning column 10. The lifting mechanism 2 is distributed on one side of the mounting base 1, one end of the pressing arm 3 is connected with the lifting mechanism 2, and the other end of the pressing arm 3 is arranged above the mounting base 1. The pressing arm 3 has a first position close to the mounting base 1 and a second position away from the mounting base 1, and the pressing arm 3 can be driven to be in the first position or the second position by the lifting mechanism 2. The other end of the pressing arm 3 is provided with a plug rod 30 coaxial with the positioning column 10, and the plug rod 30 is provided with a tensioning structure 31 capable of moving radially elastically. The plug rod 30 passes through the nut box C and the nut B in sequence, and the nut B is fixed on the plug rod 30 by the tensioning structure 31. When the pressing arm 3 is in the first position, the plug rod 30 is close to the positioning column 10, and the nut box C is tightly attached to the sheet metal shell A. When the pressing arm 3 is in the second position, the nut box C and the nut B can be sleeved on the plug rod 30.

[0037] As Figure 1, the metal shell A is provided with a through hole, when the nut B provided with the nut B is welded on the metal shell A, the nut B can be threadedly connected with the external bolt through the through hole, and the nut box C is used to avoid the rotation of the nut B, therefore, the nut box C is generally a square box body structure, and the bottom of the four side walls of the nut box C is provided with an outward flange, the outward flange is used to fit the surface of the metal shell A, so as to facilitate welding, the top wall of the nut box C is also provided with a through hole, when the nut B is placed in the nut box C, the opening of the nut box C faces downward, the nut B and the two through holes are coaxial, the nut box C is welded with the metal shell A, based on the nut box C, the mounting base 1 provided with the positioning column 10 is used to place the metal shell A in the embodiment, the number of the positioning column 10 can be set according to the number of the through holes on the metal shell A, the metal shell A has two through holes in the embodiment, and two sets of nut boxes C provided with the nut B need to be welded, therefore, the positioning column 10 is provided with two in the embodiment, when the metal shell A is placed on the mounting base 1, the positioning column 10 passes through the through hole of the metal shell A coaxially, the lifting mechanism 2 is arranged beside the mounting base 1 in the embodiment, the pressing arm 3 is controlled to be in the first position or the second position through the lifting mechanism 2, the plug rod 30 on the pressing arm 3 is coaxial with the mounting column at different positions of the pressing arm 3, so that the nut B sleeved on the plug rod 30 and the nut box C can be pressed on the metal shell A at the preset position, the plug rod 30 is provided with the straining structure 31, the nut B can be sleeved on the plug rod 30 without external force through the straining structure 31, and the nut box C is also sleeved on the plug rod 30 due to gravity and assembly direction, when the pressing arm 3 is in the second position, the worker can sleeve the nut box C provided with the nut B on the plug rod 30, and ensure that the angle of the nut box C is the predetermined angle welded on the metal shell A, then the pressing arm 3 is driven to the first position through the lifting mechanism 2, the nut box C is pressed on the metal shell A through the pressing arm 3, so as to perform subsequent welding work, in addition, the straining structure 31 is in the inner hole of the nut B, so that the plug rod 30 does not interfere with welding during the welding process, the reasonable space structure distribution is beneficial to improve the welding efficiency, after the welding is completed and fixed, the pressing arm 3 is moved to the second position through the lifting mechanism 2, in the process, the straining structure 31 overcomes the friction with the inner wall of the nut B and separates from the nut B under the action of external force, for example, the straining structure 31 can be a metal spring piece with elasticity, and the metal spring piece is a protrusion arranged on the outer wall of the plug rod 30, when the plug rod 30 and the metal spring piece are not subjected to external force, the sum of the outer diameters of the plug rod 30 and the metal spring piece is greater than the inner diameter of the nut B, the plug rod 30 is inserted into the inner hole of the nut B, so that the metal spring piece is deformed and outwardly straining the inner wall of the nut B, the nut B and the nut box C are stably sleeved on the plug rod 30 through the friction between the metal spring piece and the inner wall of the nut B, in addition, the elastic structure mode as described in the subsequent embodiment can be used to realize the straining effect of the plug rod 30 on the nut B.It should be noted that the mounting base 1 and the lifting mechanism 2 can be fixed on a welding tool platform 4, and the number of the mounting base 1 and the lifting mechanism 2 can be set according to the size of the platform and the number of the welding guns to realize multi-station welding.

[0038] In general, the mounting base 1 with the positioning column 10 is used to place the sheet metal shell A, the position of the nut B and the nut box C is controlled by the pressing arm 3 with the first position and the second position, the plug rod 30 coaxial with the positioning column 10 is used to stably clamp the nut B and the nut box C, and it is ensured that the pressing arm 3 presses the nut B and the nut box C at a preset angle on the sheet metal shell A for welding, so that manual adjustment of the angle of the nut box C in the narrow space of the sheet metal shell A before the pressing arm 3 presses the nut box C is not needed, the working efficiency is improved, and the welding angle of the nut box C is ensured to be accurate. In addition, the plug rod 30 clamps from the inner hole of the nut B by using the tensioning structure 31, the space structure is reasonably distributed, and the welding efficiency is effectively improved.

[0039] Referring to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 , the tensioning structure 31 includes the mounting pipe 311 and the wave bead 310 arranged on the mounting pipe 311, the inner side of the wave bead 310 is provided with a spring, and the outer side of the wave bead 310 is used to contact the inner wall of the nut B. Specifically, the plug rod 30 is provided with a radially extending assembly hole 300, the mounting pipe 311 is threadedly connected in the assembly hole 300, and the mounting pipe 311 is provided with one end of the wave bead 310 extending out of the plug rod 30. The wave bead 310 with the spring is arranged in the mounting pipe 311, the depth of the mounting pipe 311 in the assembly hole 300 is adjusted by a tool, the length of the wave bead 310 extending out of the plug rod 30 is adjusted, the friction between the wave bead 310 and the inner wall of the nut B is changed, the tensioning effect of the wave bead 310 on the nut B is improved, and the nut B can be stably sleeved on the plug rod 30.

[0040] In order to enable the other end of the pressing arm 3 to press and tightly fit the top wall of the nut box C, the other end of the pressing arm 3 is provided with a pressing wall 330, and the plug rod 30 is perpendicular to the pressing wall 330. When the pressing arm 3 is in the first position, the pressing wall 330 presses and tightly fits the nut box C on the sheet metal shell A by fitting with the top wall of the nut box C, the pressing force of the pressing wall 330 on the nut box C can be changed by the lifting mechanism 2, the pressing wall 330 can stably press and tightly fit the nut box C on the sheet metal shell A, and the welding effect is improved.

[0041] As Figure 4 , Figure 5 and Figure 6The other end of the pressing arm 3 is provided with a positioning piece 34, the positioning piece 34 is arranged on one side of the insertion rod 30, and the positioning piece 34 is provided with a positioning groove 340 on the side wall facing the insertion rod 30. After the nut B and the nut box C are sleeved on the insertion rod 30, any side wall of the nut box C can be embedded in the positioning groove 340, wherein the direction of the positioning groove 340 is determined according to the sheet metal shell A and the through hole on the sheet metal shell A. The embedding of the positioning groove 340 and the side wall of the nut box C makes the nut box C not rotate on the insertion rod 30, and because the positioning groove 340 is a pre-set angle and position component, when the nut box C is driven by the pressing arm 3 to be in the first position, the nut box C can be immediately welded without manual adjustment, effectively improving the work efficiency. In summary, the worker only needs to embed any side wall of the nut box C in the positioning groove 340 to complete the angle adjustment of the nut box C, so that the nut box C can be welded on the sheet metal shell A according to the preset angle.

[0042] Referring to the accompanying drawings Figure 3 The lifting mechanism 2 comprises an L-shaped base 20, a connecting table 21 and a gas cylinder 22. The L-shaped base 20 is provided with a sliding rail 200. The connecting table 21 is provided with a sliding table 210 connected with the sliding rail 200. The connecting table 21 is further provided with a mounting plate 212 for connecting the pressing arm 3. The connecting table 21 is provided with an extension rod 211 connected with the extension rod of the gas cylinder 22. Specifically, the connecting table 21 is further provided with a handle 213. The worker can move the connecting table 21 up and down by controlling the handle 213. The gas cylinder 22 plays a locking role to keep the pressing arm 3 in the first position or the second position. In this embodiment, the lifting structure and the pressing arm 3 can be provided with two groups according to the number of positioning columns 10 to realize double-station welding of two nut boxes C on the sheet metal shell A.

[0043] In this embodiment, the pressing arm 3 is designed as an L-shaped rod, which comprises a mounting rod 32 and a pressing rod 33 connected with each other. The mounting rod 32 is fixedly connected with the mounting plate 212. The insertion rod 30 is distributed at the end of the pressing rod 33. The mounting rod 32 is attached to the mounting plate 212 and is tightened by bolts. The pressing rod 33 is used for assembling the positioning piece 34 and the insertion rod 30, and the pressing wall 330 is the end wall of the pressing rod 33. In this embodiment, the pressing arm 3 is designed as an L-shaped rod, which can make the L-shaped base 20 of the lifting mechanism 2 away from the mounting base 1, avoiding the interference of the L-shaped base 20 with the welding of the sheet metal shell A and the nut box C by the welding gun.

[0044] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A welding clamp tool for clamping a nut, a nut box and pressing on a sheet metal shell, characterized by, The welding clamping tool comprises a mounting base, a lifting mechanism and a pressing arm; The mounting base is provided with a positioning column, and the metal shell is placed on the mounting base, and the through hole on the metal shell is coaxially sleeved on the positioning column; The lifting mechanism is arranged on one side of the mounting base, one end of the pressing arm is connected to the lifting mechanism, and the other end of the pressing arm is arranged above the mounting base, the pressing arm has a first position close to the mounting base and a second position away from the mounting base, and the lifting mechanism can drive the pressing arm to be in the first position or the second position; The other end of the pressing arm is provided with a plug rod coaxial with the positioning column, the plug rod is provided with a tensioning structure capable of moving radially elastically, and the plug rod sequentially penetrates the nut box and the nut, and the nut is fixed on the plug rod through the tensioning structure; When the pressing arm is in the first position, the plug rod is close to the positioning column, and the nut box is tightly attached to the metal shell; when the pressing arm is in the second position, the nut box and the nut are sleeved on the plug rod.

2. A welding fixture as defined in claim 1, wherein The tensioning structure comprises a mounting pipe and a wave bead arranged on the mounting pipe, the inner side of the wave bead is provided with a spring, and the outer side of the wave bead is used for contacting the inner wall of the nut.

3. A welding fixture as defined in claim 2, wherein, The plug rod is provided with a radially extending assembly hole, the mounting pipe is threadedly connected in the assembly hole, and one end of the mounting pipe provided with the wave bead protrudes out of the plug rod.

4. A welding fixture as defined in claim 2, wherein, The other end of the pressing arm is provided with a positioning member, the positioning member is arranged on one side of the plug rod, and a positioning groove is arranged on one side wall of the plug rod facing the plug rod.

5. A welding fixture as defined in claim 4, wherein, The other end of the pressing arm is provided with a pressing wall, and the plug rod is perpendicular to the pressing wall, when the pressing arm is in the first position, the pressing wall is tightly pressed on the nut box by abutting with the top wall of the nut box.

6. A welding fixture as defined in claim 1, wherein, The lifting mechanism comprises an L-shaped base and a connecting table, the L-shaped base is provided with a sliding rail, the connecting table is provided with a sliding table connected with the sliding rail, and the connecting table is further provided with a mounting plate for connecting the pressing arm.

7. A welding fixture as defined in claim 6, wherein, The lifting mechanism further comprises a gas cylinder, and the connecting table is provided with an extension rod connected with the extension rod of the gas cylinder.

8. A welding fixture as defined in claim 7, wherein, The connecting table is further provided with a handle.

9. A welding fixture as defined in claim 6, wherein, The pressing arm is an L-shaped rod, the pressing arm comprises a mounting rod and a pressing rod connected with each other, the mounting rod is fixedly connected with the mounting plate, and the plug rod is arranged at the end of the pressing rod.

10. The welding fixture of claim 6, wherein, The positioning column, the lifting mechanism and the pressing arm are each provided with at least two.

Images