A welding fixture for a steel-shell battery shell with a curved surface

Abstract

The present invention discloses a steel shell battery shell welding fixture with a curved surface, comprising a fixing plate, an upper template and a lower template, a lower template displacement hole is provided in the middle of the fixing plate, a lifting cylinder is provided below the lower template, upper template displacement control cylinders are respectively provided at both ends of the upper template, a base is provided in the middle of the upper end of the lower template, a shell positioning seat is provided on the base, a shell positioning groove is provided on the shell positioning seat, a pressing film is provided in the middle of the bottom surface of the upper template, a through hole is provided on the pressing film, and the through hole extends all the way to the upper plane of the upper template. The present invention adopts the mold closing method of the upper template and the lower template to position weld the battery shell and the shell cover, which can prevent the side of the shell cover from being deformed or warped due to the extrusion of the positioning mechanism, and can make the shell and the shell cover fit tightly. Since the shape and size of the through hole are the same as the shape and size of the shell positioning groove, the laser head welds the shell and the shell cover from the edge trajectory of the through hole, so as to achieve full welding of the shell and the shell cover.

Description

Technical Field

[0001] The invention relates to shell welding equipment for a steel shell battery, and in particular to a steel shell battery shell welding fixture with a curved surface. Background Art

[0002] When manufacturing curved steel battery cases, the case and cover need to be welded together, and a battery welding fixture is required to position the case to improve welding accuracy. However, currently, after positioning the curved steel battery case, the curved surface is prone to warping, resulting in cold welds in the warped area of ​​the case, affecting the airtightness of the case. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a steel shell battery casing welding fixture with a curved surface.

[0004] The object of the present invention is achieved through the following technical solutions: A steel shell battery shell welding fixture with a curved surface, comprising a fixing plate, an upper template and a lower template, wherein the middle part of the fixing plate is provided with a lower template displacement hole, a lifting cylinder is provided below the lower template, and upper template displacement control cylinders are provided at both ends of the upper template, a base is provided at the middle part of the upper end of the lower template, a shell positioning seat is provided on the base, a shell positioning groove is provided on the shell positioning seat, a pressing film is provided in the middle part of the bottom surface of the upper template, a through hole is provided on the pressing film, and the through hole extends to the upper plane of the upper template, the shape and size of the pressing film are the same as the shape and size of the shell positioning seat, and the shape and size of the through hole are the same as the shape and size of the shell positioning groove;

[0005] When the upper template is pressed down and closed with the lower template, the pressing film is pressed on the shell positioning seat, the through hole corresponds to the shell positioning groove, and the laser welds the shell and the shell cover along the edge of the through hole.

[0006] As an improvement of the steel shell battery shell welding fixture with a curved surface of the present invention, the shell positioning groove has two curved surfaces and two inclined surfaces, and the positions corresponding to the two curved surfaces on the lower template are provided with curved surface positioning mechanisms, and the positions corresponding to the two inclined surfaces on the lower template are both provided with inclined surface positioning mechanisms.

[0007] As an improvement to the steel shell battery casing welding fixture with a curved surface of the present invention, the upper plane of the lower template is provided with four mounting grooves, the four mounting grooves are arranged in a cross shape, the two inclined surface positioning mechanisms are respectively arranged in a horizontal mounting groove, and the two curved surface positioning mechanisms are respectively arranged in a longitudinal mounting groove.

[0008] As an improvement of the steel shell battery shell welding fixture with a curved surface of the present invention, the inclined surface positioning mechanism includes an inclined surface positioning cylinder, an inclined surface positioning slide, an inclined surface positioning adapter block, an inclined surface positioning guide rail and an inclined surface positioning block, the inclined surface positioning slide is connected to the inclined surface positioning guide rail through a slider, the inclined surface positioning slide is provided with a mounting groove, the inclined surface positioning block is fixed on the mounting groove, the inclined surface positioning adapter block is provided with a first spring positioning screw, the first spring positioning screw is passed through a first spring, the first spring positioning screw is screwed to the inclined surface positioning slide, and the piston rod end of the inclined surface positioning cylinder is connected to the inclined surface positioning adapter block;

[0009] An inclined surface top block is provided at the end of the inclined surface positioning block, and an abutting inclined surface is provided on the inclined surface top block.

[0010] As an improvement of the steel shell battery shell welding fixture with a curved surface of the present invention, the curved surface positioning mechanism includes a curved surface positioning cylinder, a curved surface positioning slide, a curved surface positioning adapter block, a curved surface positioning guide rail and a curved surface positioning block, the curved surface positioning slide is connected to the curved surface positioning guide rail through a slider, the curved surface positioning slide is provided with a groove, the curved surface positioning block is fixed on the groove, the curved surface positioning adapter block is provided with a second spring positioning screw, the second spring positioning screw is provided with a second spring, the second spring positioning screw is screwed to the curved surface positioning slide, and the piston rod end of the curved surface positioning cylinder is connected to the curved surface positioning adapter block;

[0011] The end of the curved surface positioning block is provided with an arc-shaped protrusion or an arc-shaped groove.

[0012] As an improvement to the curved steel shell battery casing welding fixture of the present invention, a plurality of guide pillars are spaced apart on the fixed plate, each of the guide pillars is provided with a buffer spring, and the four corner positions of the upper template are slidably connected to the guide pillars through guide sleeves.

[0013] As an improvement of the curved steel shell battery housing welding fixture of the present invention, a connecting seat is further provided on the fixing plate, and the piston rod end of the upper template displacement control cylinder is connected to the connecting seat of the fixing plate.

[0014] As an improvement to the curved steel shell battery housing welding fixture of the present invention, both ends of the upper template are provided with gas springs.

[0015] As an improvement of the welding fixture of the steel shell battery shell with a curved surface of the present invention, the lifting cylinder is fixed on a bottom bracket, and lifting guide rails are provided at the four corners of the bottom bracket. A plurality of connecting plates are provided at intervals at the bottom of the lower template, and the connecting plates are connected to the lifting guide rails through sliders. The end of the piston rod of the lifting cylinder is connected to the bottom of the lower template.

[0016] As an improvement to the welding fixture of the curved steel shell battery shell of the present invention, a blowing hole is provided at the bottom of the shell positioning groove, and the blowing hole is connected to the air supply equipment through a pipeline. The side of the shell positioning groove is provided with an exhaust hole, and the exhaust hole is connected to the vacuum equipment through a pipeline. The blowing hole can provide a positive pressure drop to lift the shell and fit closely with the shell cover, and the exhaust hole provides negative pressure, which can enable the shell cover to be adsorbed downward and in close contact with the shell.

[0017] The beneficial effects of the present invention are as follows: the present invention adopts the method of closing the upper template and the lower template to position-weld the battery shell and the shell cover, which can prevent the side of the shell cover from being deformed or warped due to the extrusion of the positioning mechanism, and can make the shell and the shell cover fit tightly. Since the shape and size of the through hole are the same as the shape and size of the positioning groove of the shell, the laser head welds the shell and the shell cover from the edge track of the through hole, thereby achieving full welding of the shell and the shell cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 is a side view of the present invention;

[0021] Figure 4 It is a schematic diagram of the lower template structure of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the inclined plane positioning mechanism of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the curved surface positioning mechanism of the present invention;

[0024] The accompanying drawings are marked as follows: 1. fixing plate, 2. upper template, 3. lower template, 4. lower template clearance hole, 5. lifting cylinder, 6. upper template displacement control cylinder, 7. base, 8. shell positioning seat, 9. shell positioning groove, 10. pressing film, 11. through hole, 12. curved surface positioning mechanism, 13. inclined surface positioning mechanism, 14. mounting groove, 15. lifting guide rail, 16. connecting plate, 17. bottom bracket, 101. guide column, 102. buffer spring, 103. guide sleeve, 104. connecting seat, 105. gas spring, 121. curved surface positioning cylinder, 122. Curved surface positioning slide plate, 123. Curved surface positioning adapter block, 124. Curved surface positioning guide rail, 125. Curved surface positioning block, 126. Groove, 127. Second spring positioning screw, 128. Second spring, 129. Arc-shaped protrusion, 131. Inclined surface positioning cylinder, 132. Inclined surface positioning slide plate, 133. Inclined surface positioning adapter block, 134. Inclined surface positioning guide rail, 135. Inclined surface positioning block, 136. Mounting groove, 137. First spring positioning screw, 138. First spring, 139. Inclined surface top block, 130. Top inclined surface. DETAILED DESCRIPTION

[0025] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1-6As shown, a steel shell battery shell welding fixture with a curved surface includes a fixing plate 1, an upper template 2 and a lower template 3. A lower template clearance hole 4 is provided in the middle of the fixing plate 1, and a lifting cylinder 5 is provided below the lower template 3. The lifting cylinder 5 can drive the lower template 3 to extend from the lower template clearance hole 4. Upper template displacement control cylinders 6 are provided at both ends of the upper template 2. A base 7 is provided in the middle of the upper end of the lower template 3, and a shell positioning seat 8 is provided on the base 7. The shell positioning seat 8 is provided with a shell positioning groove 9. A pressing film 10 is provided in the middle of the bottom surface of the upper template 2, and a through hole 11 is provided on the pressing film 10. The through hole 11 extends to the upper plane of the upper template 2. The shape and size of the pressing film 10 are the same as those of the shell positioning seat 8, and the shape and size of the through hole 11 are the same as those of the shell positioning groove 9.

[0029] When the upper template 2 is pressed down and closed with the lower template 3, the pressing film 10 is pressed on the shell positioning seat 8, the through hole 11 corresponds to the shell positioning groove 9, and the laser welds the shell and the shell cover along the edge of the through hole 11.

[0030] Preferably, the housing positioning groove 9 has two curved surfaces and two inclined surfaces, and the positions corresponding to the two curved surfaces on the lower template 3 are provided with curved surface positioning mechanisms 12, and the positions corresponding to the two inclined surfaces on the lower template 3 are both provided with inclined surface positioning mechanisms 13.

[0031] Preferably, the upper plane of the lower template 3 is provided with four mounting grooves 14, which are arranged in a cross shape. The two inclined surface positioning mechanisms 13 are respectively arranged in a horizontal mounting groove, and the two curved surface positioning mechanisms 12 are respectively arranged in a longitudinal mounting groove.

[0032] Preferably, the inclined surface positioning mechanism 13 includes an inclined surface positioning cylinder 131, an inclined surface positioning slide 132, an inclined surface positioning adapter block 133, an inclined surface positioning guide rail 134 and an inclined surface positioning block 135. The inclined surface positioning slide 132 is connected to the inclined surface positioning guide rail 135 through a slider. The inclined surface positioning slide 132 is provided with a mounting groove 136. The inclined surface positioning block 135 is fixed on the mounting groove 136. The inclined surface positioning adapter block 133 is provided with a first spring positioning screw 137. The first spring positioning screw 137 is provided with a first spring 138. The first spring positioning screw 137 is screwed to the inclined surface positioning slide 132. The piston rod end of the inclined surface positioning cylinder 131 is connected to the inclined surface positioning adapter block 133.

[0033] An inclined surface top block 139 is provided at the end of the inclined surface positioning block 135 , and an abutting inclined surface 130 is provided on the inclined surface top block 139 .

[0034] Preferably, the curved surface positioning mechanism 12 includes a curved surface positioning cylinder 121, a curved surface positioning slide 122, a curved surface positioning adapter block 123, a curved surface positioning guide rail 124 and a curved surface positioning block 125. The curved surface positioning slide 122 is connected to the curved surface positioning guide rail 124 through a slider. The curved surface positioning slide 122 is provided with a groove 126. The curved surface positioning block 125 is fixed on the groove 126. The curved surface positioning adapter block 123 is provided with a second spring positioning screw 127. The second spring positioning screw 127 is provided with a second spring 128. The second spring positioning screw 127 is screwed to the curved surface positioning slide 122. The piston rod end of the curved surface positioning cylinder 121 is connected to the curved surface positioning adapter block 123.

[0035] The end of the curved surface positioning block 125 is provided with an arc-shaped protrusion 129 or an arc-shaped groove. The end of the curved surface positioning block 125 on one curved surface positioning mechanism 12 is provided with an arc-shaped protrusion 129, and the end of the curved surface positioning block 125 on the other curved surface positioning mechanism 12 is provided with an arc-shaped groove.

[0036] Preferably, a plurality of guide pillars 101 are spaced apart on the fixed plate 1 , each guide pillar 101 is provided with a buffer spring 102 , and the four corner positions of the upper template 2 are slidably connected to the guide pillars 101 through guide sleeves 103 .

[0037] Preferably, a connecting seat 104 is further provided on the fixed plate 1 , and the piston rod end of the upper template displacement control cylinder 6 is connected to the connecting seat 104 of the fixed plate.

[0038] Preferably, gas springs 105 are provided at both ends of the upper template 2 .

[0039] Preferably, the lifting cylinder 5 is fixed on a bottom bracket 17, and lifting guide rails 15 are provided at the four corners of the bottom bracket 17. A plurality of connecting plates 16 are provided at intervals at the bottom of the lower template 3. The connecting plates 16 are connected to the lifting guide rails 15 through sliders, and the piston rod end of the lifting cylinder 5 is connected to the bottom of the lower template 3.

[0040] Preferably, a blowing hole (not shown) is provided at the bottom of the shell positioning groove 9, and the blowing hole is connected to the air supply equipment through a pipe. An exhaust hole (not shown) is provided on the side of the shell positioning groove, and the exhaust hole is connected to the vacuum equipment through a pipe. The blowing hole can provide a positive pressure drop to lift the shell and fit closely with the shell cover, and the exhaust hole provides negative pressure, which can enable the shell cover to be adsorbed downward and in close contact with the shell.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and structure of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a steel-shell battery housing with a curved surface, characterized in that: It includes a fixed plate, an upper template and a lower template, the middle part of the fixed plate is provided with a lower template giving hole, a lifting cylinder is provided under the lower template, and upper template displacement control cylinders are provided at both ends of the upper template, a base is provided at the middle part of the upper end of the lower template, a shell positioning seat is provided on the base, a shell positioning groove is provided on the shell positioning seat, a pressing film is provided in the middle part of the bottom surface of the upper template, a through hole is provided on the pressing film, and the through hole extends to the upper plane of the upper template, the shape and size of the pressing film are the same as those of the shell positioning seat, and the shape and size of the through hole are the same as those of the shell positioning groove; When the upper template is pressed down and closed with the lower template, the pressing film is pressed on the shell positioning seat, the through hole corresponds to the shell positioning groove, and the laser welds the shell and the shell cover along the edge of the through hole.

2. The curved steel shell battery housing welding fixture according to claim 1, characterized in that: The housing positioning groove has two curved surfaces and two inclined surfaces. The positions on the lower template corresponding to the two curved surfaces are provided with curved surface positioning mechanisms, and the positions on the lower template corresponding to the two inclined surfaces are both provided with inclined surface positioning mechanisms.

3. The curved steel shell battery housing welding fixture according to claim 2, characterized in that: The upper plane of the lower template is provided with four mounting grooves, which are arranged in a cross shape. The two inclined surface positioning mechanisms are respectively arranged in a horizontal mounting groove, and the two curved surface positioning mechanisms are respectively arranged in a longitudinal mounting groove.

4. The curved steel shell battery housing welding fixture according to claim 2, characterized in that: The inclined surface positioning mechanism includes an inclined surface positioning cylinder, an inclined surface positioning slide, an inclined surface positioning adapter block, an inclined surface positioning guide rail and an inclined surface positioning block, the inclined surface positioning slide is connected to the inclined surface positioning guide rail through a slider, the inclined surface positioning slide is provided with a mounting groove, the inclined surface positioning block is fixed on the mounting groove, the inclined surface positioning adapter block is provided with a first spring positioning screw, the first spring positioning screw is passed through the first spring positioning screw, the first spring positioning screw is screwed to the inclined surface positioning slide, and the piston rod end of the inclined surface positioning cylinder is connected to the inclined surface positioning adapter block; An inclined surface top block is provided at the end of the inclined surface positioning block, and an abutting inclined surface is provided on the inclined surface top block.

5. The curved steel shell battery housing welding fixture according to claim 2, characterized in that: The curved surface positioning mechanism includes a curved surface positioning cylinder, a curved surface positioning slide, a curved surface positioning adapter block, a curved surface positioning guide rail and a curved surface positioning block, the curved surface positioning slide is connected to the curved surface positioning guide rail through a slider, the curved surface positioning slide is provided with a groove, the curved surface positioning block is fixed on the groove, the curved surface positioning adapter block is provided with a second spring positioning screw, the second spring positioning screw is passed through a second spring, the second spring positioning screw is screwed to the curved surface positioning slide, and the piston rod of the curved surface positioning cylinder is connected to the curved surface positioning adapter block; The end of the curved surface positioning block is provided with an arc-shaped protrusion or an arc-shaped groove.

6. The curved steel shell battery housing welding fixture according to claim 1, characterized in that: A plurality of guide pillars are arranged at intervals on the fixed plate, each of the guide pillars is provided with a buffer spring, and the four corner positions of the upper template are slidably connected to the guide pillars through guide sleeves.

7. The curved steel shell battery housing welding fixture according to claim 6, characterized in that: The fixing plate is further provided with a connecting seat, and the piston rod end of the upper template displacement control cylinder is connected to the connecting seat of the fixing plate.

8. The curved steel shell battery housing welding fixture according to claim 1, characterized in that: Gas springs are provided at both ends of the upper template.

9. The curved steel shell battery housing welding fixture according to claim 1, characterized in that: The lifting cylinder is fixed on a bottom bracket, and lifting guide rails are provided at the four corners of the bottom bracket. A plurality of connecting plates are provided at intervals at the bottom of the lower template, and the connecting plates are connected to the lifting guide rails through sliders. The end of the piston rod of the lifting cylinder is connected to the bottom of the lower template.

10. The curved steel shell battery housing welding fixture according to claim 1, characterized in that: An air blowing hole is provided at the bottom of the shell positioning groove, and the air blowing hole is connected to the air supply equipment through a pipeline. An air exhaust hole is provided on the side of the shell positioning groove. The air blowing hole can provide a positive pressure drop to lift the shell and fit closely with the shell cover. The air exhaust hole provides negative pressure to enable the shell cover to be adsorbed downward and in close contact with the shell.

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