Welding fixture

Abstract

The welding fixture comprises an upper pressing plate and a lower pressing plate, a positioning hole allowing a positioning shaft to penetrate through is formed in the upper pressing plate, the diameter of the positioning hole is larger than that of the positioning shaft and smaller than that of a connecting disc, and the lower pressing plate abuts against the end, away from the positioning shaft, of a mounting column. A positioning space used for positioning a welding workpiece is defined between the upper pressing plate and the lower pressing plate, a positioning assembly used for positioning the circumferential direction of a mounting column is arranged on the lower pressing plate, and the upper pressing plate and the lower pressing plate are detachably connected through a connecting piece. The welding device has the effect of conveniently improving the stability and accuracy of the welded workpiece.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of clamps, in particular to a welding clamp. BACKGROUND

[0002] Laser welding is a kind of high-efficiency precision welding method using high-energy density laser beam as heat source. Laser welding is one of the important aspects of laser material processing technology application. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding, and the welding process belongs to heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction, and by controlling the width, energy, peak power and repetition frequency of the laser pulse and other parameters, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to precision welding of micro and small parts.

[0003] REFERENCE Figure 1 The workpiece to be welded includes a first component, a second component and a third component, the first component includes a positioning shaft 1, the positioning shaft 1 is integrally formed with a connecting disc 2 coaxial with the positioning shaft 1 and having a diameter larger than that of the positioning shaft 1, the second component is provided as a hollow connecting cylinder 3, one end of the connecting disc 2 is provided with a slot 9 for inserting the end of the connecting cylinder 3, and the third component includes a mounting column 10, one end of the mounting column 10 is inserted into the connecting cylinder 3, the mounting column 10 is integrally formed with a ring plate 11 coaxial with the mounting column 10 and having a diameter larger than that of the connecting cylinder 3, the end wall of the connecting cylinder 3 abuts against the ring plate 11, and the end of the mounting column 10 away from the connecting cylinder 3 is provided with a insertion hole 12, a key groove 13 is formed in the hole wall of the insertion hole 12, and the end of the key groove 13 is in communication with the hole opening of the insertion hole 12.

[0004] In the related art, when the first component, the second component and the third component of the above-mentioned part are welded together by laser welding, the positioning is performed by the operator holding by hand, and the stability and accuracy are poor. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the above-mentioned problems, the present application provides a welding clamp.

[0006] The welding clamp provided by the present application adopts the following technical scheme:

[0007] A welding clamp includes an upper pressing plate and a lower pressing plate, the upper pressing plate is provided with a positioning hole for the positioning shaft to pass through, the diameter of the positioning hole is larger than the diameter of the positioning shaft and smaller than the diameter of the connecting disc, the lower pressing plate abuts against the end of the mounting column away from the positioning shaft, the upper pressing plate and the lower pressing plate form a positioning space for positioning the welding workpiece therebetween, the lower pressing plate is provided with a positioning assembly for positioning the circumference of the mounting column, and the upper pressing plate and the lower pressing plate are detachably connected through a connecting piece.

[0008] Further, the positioning assembly comprises a connecting column, one end of the connecting column extends into the positioning hole away from the lower pressing plate, a flat key which can match the key groove is arranged on the peripheral wall of the connecting column, the length direction of the flat key is parallel to the axis direction of the connecting column, and the accommodating groove for accommodating the connecting column and the flat key is arranged on the lower pressing plate.

[0009] Further, the lower pressing plate is provided with a plug rod for connecting the connecting column and the lower pressing plate, a through hole is arranged on the side wall of the lower pressing plate, a through hole is arranged on the side wall of the connecting column, the through hole and the through hole are communicated, and the plug rod passes through the through hole and the through hole in sequence.

[0010] Further, the connecting piece comprises a connecting bolt, one end of the connecting bolt away from the screw head passes through the upper pressing plate and is threadedly connected with the lower pressing plate, and the bottom wall of the screw head of the connecting bolt abuts against the upper pressing plate.

[0011] Further, a plurality of connecting bolts are arranged, and the plurality of connecting bolts are uniformly distributed along the circumference of the positioning hole.

[0012] Further, a recess for inserting the connecting disc is arranged on one side of the upper pressing plate close to the lower pressing plate.

[0013] In summary, the present application has at least one of the following beneficial technical effects:

[0014] Through the combined design of the upper pressing plate and the lower pressing plate, a positioning space for positioning the welded workpiece is formed, which can accurately clamp the first assembly, the second assembly and the third assembly of the workpiece, and is beneficial to improve the stability and accuracy in the welding process, and the positioning shaft passes through the positioning hole, which is beneficial to realize good axial positioning.

[0015] The flat key matches the key groove, and the circumferential rotation and vibration of the mounting column are avoided as much as possible, which is beneficial to improve the stability of the connecting column on the mounting column, and further improves the positioning accuracy of the whole clamp.

[0016] The connecting bolts are uniformly distributed along the circumference of the positioning hole, which ensures the uniform distribution of the clamping force between the upper pressing plate and the lower pressing plate, different lengths of adjusting bolts are selected to realize the positioning of different workpieces to be welded, and deformation or damage of the workpiece caused by uneven force in the welding process is avoided as much as possible. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an explosion diagram of the workpiece which needs to be welded in the embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the overall structure of a welding clamp in the embodiment of the present application.

[0019] Figure 3 For Figure 1 A-A sectional view.

[0020] Figure 4 For the overall structure of the positioning assembly in the embodiment of the application.

[0021] Reference signs: 1, positioning shaft; 2, connecting disc; 3, connecting cylinder; 4, upper pressing plate; 5, lower pressing plate; 6, positioning space; 7, positioning assembly; 71, connecting column; 8, connecting piece; 81, connecting bolt; 9, insertion slot; 10, mounting column; 11, ring plate; 12, insertion hole; 13, key groove; 14, flat key; 15, containing groove; 16, insertion rod; 17, through hole; 18, through hole; 19, groove. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying Figures 2-4 Further detailed description of the application.

[0023] The embodiment of the application discloses a welding fixture.

[0024] Referring to Figure 2 and Figure 3 A welding fixture comprises an upper pressing plate 4 and a lower pressing plate 5, the upper pressing plate 4 is provided with a positioning hole through which a positioning shaft 1 passes, the diameter of the positioning hole is greater than the diameter of the positioning shaft 1 and is smaller than the diameter of a connecting disc 2, the lower pressing plate 5 abuts against the end of a mounting column 10 away from the positioning shaft 1, the positioning space 6 for positioning a welding workpiece is formed between the upper pressing plate 4 and the lower pressing plate 5, the lower pressing plate 5 is provided with a positioning assembly 7 for positioning the circumference of the mounting column 10, and the upper pressing plate 4 and the lower pressing plate 5 are detachably connected through a connecting piece 8.

[0025] Through the combined design of the upper pressing plate 4 and the lower pressing plate 5, the positioning space 6 for positioning the welding workpiece is formed, the first assembly, the second assembly and the third assembly of the workpiece can be accurately clamped, and the stability and accuracy in the welding process are improved, the positioning shaft 1 passes through the positioning hole, and good axial positioning is achieved.

[0026] Referring to Figure 3 and Figure 4The positioning assembly 7 comprises a connecting column 71, the connecting column 71 is inserted into the positioning hole from the end away from the lower pressing plate 5, a flat key 14 matched with the key groove 13 is arranged on the peripheral wall of the connecting column 71, the length direction of the flat key 14 is parallel to the axis direction of the connecting column 71, the accommodating groove 15 for accommodating the connecting column 71 and the flat key 14 is arranged on the lower pressing plate 5, the inserting rod 16 for connecting the connecting column 71 and the lower pressing plate 5 is arranged on the lower pressing plate 5, the through hole 17 is arranged on the side wall of the lower pressing plate 5, the through hole 18 is arranged on the side wall of the connecting column 71, the through hole 18 is communicated with the through hole 17, and the inserting rod 16 passes through the through hole 17 and the through hole 18 in sequence.

[0027] The flat key 14 is matched with the key groove 13, the circumferential rotation and vibration of the mounting column 10 are avoided as much as possible, the stability of the connecting column 71 on the mounting column 10 is improved, and the positioning accuracy of the whole clamp is improved.

[0028] Referring to Figure 2 The connecting piece 8 comprises connecting bolts 81, the connecting bolts 81 are screwed with the lower pressing plate 5 through the upper pressing plate 4 from the end away from the screw head, the screw head bottom wall of the connecting bolt 81 is abutted against the upper pressing plate 4, the connecting bolts 81 are arranged in plurality, the plurality of connecting bolts 81 are uniformly distributed in the circumferential direction of the positioning hole, and the recess 19 for inserting the connecting disc 2 is arranged on the side of the upper pressing plate 4 close to the lower pressing plate 5.

[0029] The connecting bolts 81 are uniformly distributed in the circumferential direction of the positioning hole, the uniform distribution of the clamping force between the upper pressing plate 4 and the lower pressing plate 5 is ensured, the positioning of different workpieces to be welded is realized by selecting adjusting bolts with different lengths, and the deformation or damage of the workpiece caused by uneven force in the welding process is avoided as much as possible.

[0030] The implementation principle of the welding clamp is that: the positioning space 6 for positioning the welding workpiece is formed through the combined design of the upper pressing plate 4 and the lower pressing plate 5, the first assembly, the second assembly and the third assembly of the workpiece can be accurately clamped, the stability and accuracy in the welding process are improved, and the good axial positioning is realized by inserting the positioning shaft 1 through the positioning hole. The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A welding fixture, characterized by: The utility model provides a positioning device for welding workpiece, including upper pressing plate (4) and lower pressing plate (5), the upper pressing plate (4) is set with the positioning hole that the positioning axle (1) passes, the diameter of positioning hole is greater than the diameter of positioning axle (1) and is less than the diameter of connecting disc (2), the lower pressing plate (5) and the installation column (10) are away from the one end of positioning axle (1) and abut, the upper pressing plate (4) and the lower pressing plate (5) are enclosed and form the positioning space (6) for positioning welding workpiece between, the lower pressing plate (5) is provided with the positioning assembly (7) for the circumferential positioning of installation column (10), the upper pressing plate (4) and the lower pressing plate (5) are detachably connected through connecting piece (8).

2. A welding fixture according to claim 1, wherein: The positioning assembly (7) includes connecting column (71), the connecting column (71) is inserted into the positioning hole away from the one end of lower pressing plate (5), the circumferential wall of connecting column (71) is provided with the flat key (14) can and key groove (13) match, the length direction of flat key (14) and the axis direction of connecting column (71) are parallel, the accommodating slot (15) for accommodating connecting column (71) and flat key (14) is set up on the lower pressing plate (5).

3. A welding fixture according to claim 2, wherein: The lower pressing plate (5) is provided with the insertion rod (16) for connecting connecting column (71) and lower pressing plate (5), the side wall of lower pressing plate (5) is provided with through hole (17), the side wall of connecting column (71) is provided with through hole (18), the through hole (18) and through hole (17) are communicated, and insertion rod (16) passes through through hole (17) and through hole (18) in sequence.

4. The welding fixture of claim 1, wherein: The connecting piece (8) includes connecting bolt (81), the one end of connecting bolt (81) is away from the screw head and passes through the upper pressing plate (4) and is connected with the lower pressing plate (5) threadedly, and the bottom wall of the screw head of connecting bolt (81) is abutted with the upper pressing plate (4).

5. A welding fixture according to claim 4, wherein: The connecting bolt (81) is provided with multiple, and multiple connecting bolts (81) are evenly distributed along the circumferential direction of the positioning hole.

6. A welding fixture as defined in claim 1, wherein: The side of the upper pressing plate (4) close to the lower pressing plate (5) is provided with the recess (19) for the insertion of the connecting disc (2).

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