CN214264482U - Welding fixture - Google Patents

Abstract

A welding fixture comprises a lower template (7), a clamping mechanism, a plurality of connecting columns (4), an upper template (3), a plurality of supporting springs (6) and a conductive plate (1), wherein the clamping mechanism is fixedly installed on the lower template (7) and used for clamping objects (10) to be welded, the connecting columns (4) are vertically arranged and installed on the lower template (7), the upper template (3) is respectively sleeved on the connecting columns (4) in a sliding manner, the supporting springs (6) are respectively sleeved on the corresponding connecting columns (4) and are positioned between the lower template (7) and the upper template (3), and the conductive plate (1) is installed on the upper template (3); the conductive plate (1) is used for welding the object to be welded (10) and the part to be welded (11) together when being pressed down along with the upper template (3) and being in contact with the part to be welded (11) arranged at the top of the object to be welded (10). The utility model discloses a welding jig novel in design, the practicality is strong.

Description

Welding fixture

Technical Field

The utility model relates to the field of welding technique, especially, relate to a welding jig for high axiality precision and high outward appearance requirement when satisfying the spheroid welding.

Background

When butt welding is carried out by conventional resistance welding, the end faces of two workpieces are contacted, and are welded along the whole contact surface after resistance heating and pressurization. Due to the influence of the precision of the welding machine, the error is extremely large when the upper and lower welding arms move, and the coaxiality of a product welded by using a common welding fixture can only be ensured within phi 0.20 mm; the problems of burn are easily caused by shaking, loose contact and the like of the machine; therefore, the problems of size out-of-tolerance, appearance burn and the like are easily caused in the welding process of the product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned technical problem, provide a welding jig.

The technical proposal of the utility model for solving the technical problem is that:

the utility model provides a welding fixture, which comprises a lower template, a clamping mechanism, a plurality of connecting columns, an upper template, a plurality of supporting springs and a current-conducting plate, wherein the clamping mechanism is fixedly arranged on the lower template and used for clamping objects to be welded; the current conducting plate is used for being pressed down along with the upper template and welding the object to be welded and the part to be welded together when the current conducting plate is in contact with the part to be welded on the top of the object to be welded.

In the welding fixture of the utility model, the top surface of the lower template is provided with the holding tank, and the lower template is provided with the mounting column at the bottom of the holding tank; the clamping mechanism comprises a knife handle which is provided with a first through hole and is sleeved on the mounting column through the first through hole, and a clamping spring which is axially mounted on the mounting column and penetrates through the first through hole;

the clamp spring comprises a base mounted on the mounting column and a plurality of elastic parts uniformly distributed on the base in the circumferential direction; the object to be welded is inserted in the middle of the elastic parts; the clamping mechanism further comprises a lock head which is sleeved on the cutter handle in a threaded connection mode, is provided with a second through hole in the axial direction, is sleeved on the clamping spring through the second through hole, and is used for enabling the elastic parts to abut against the object to be welded through the inner wall of the second through hole when the clamping mechanism rotates downwards relative to the cutter handle, so that the object to be welded is fixedly clamped.

The utility model discloses among the foretell welding jig, the inner wall of second through-hole is the round platform shape of face, and the bottom opening diameter of second through-hole is greater than its open-top's diameter.

The utility model discloses in foretell welding jig, a plurality of elastic component tops are the round platform shape of face ground cooperatedly, with the inner wall cooperation of second through-hole.

In the welding jig of the present invention, the clamping mechanism further includes an insulating pad; the insulating base plate is provided with a third through hole, is accommodated in the accommodating groove and is sleeved on the mounting column through the third through hole; the knife handle is supported and arranged on the insulating base plate.

In the welding jig of the present invention, the inner wall of the first through hole includes a first section having a shape of a circular truncated cone and a second section coaxially connected to the first section and having a shape of a cylindrical surface; the first section is positioned above the second section; the base is in a round table shape, and the bottom of the base is provided with a groove in the axial direction; the base is clamped in the first section and sleeved on the mounting column through the groove.

In the welding fixture of the utility model, the top surface of the insulating backing plate is provided with a limit groove, and the third through hole is arranged at the bottom of the limit groove; the cutter handle support is arranged on the limiting groove bottom; the insulating base plate is arranged on the lower template through a second screw; the welding fixture further comprises a side fixing stud which is installed on the side of the lower die plate in a threaded mode, penetrates through the insulating base plate and extends into the limiting groove, and then the side face of the cutter handle is pressed against the side face of the cutter handle, so that the cutter handle is pressed and locked on the insulating base plate.

In the welding jig of the present invention, the upper mold plate is provided with a seventh through hole, and the seventh through hole is a stepped hole; the conductive plate is accommodated in the seventh through hole and is fixedly mounted on the step of the seventh through hole by a first screw.

In the welding fixture of the utility model, the lower template is provided with a fourth through hole, and the fourth through hole is a threaded hole; the welding fixture further comprises a bottom surface adjusting stud which is in threaded connection with the fourth through hole and used for adjusting the angle of the bottom surface of the lower template.

The utility model discloses among the foretell welding jig, welding jig still includes vertical setting and installs the guide post on the lower bolster, sets up the fifth through-hole that corresponds with the guide post on the cope match-plate pattern.

The utility model discloses a welding jig realizes welding motion in-process well high accuracy location, and the clamping location is reliable to guarantee that the welding back outward appearance is good not have burn and welding precision is high. The utility model discloses a welding jig novel in design, the practicality is strong.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 shows a schematic structural diagram of a welding jig according to a preferred embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional view of the welding fixture of FIG. 1 taken along the line A-A;

FIG. 3 illustrates a schematic cross-sectional view of the welding fixture of FIG. 1 in the direction B-B;

FIG. 4 is a schematic view of the welding fixture of FIG. 1 in another orientation;

FIG. 5 illustrates a cross-sectional view of the weld fixture of FIG. 4 in the direction C-C;

FIG. 6 is a schematic diagram of a clamp spring of the welding fixture of FIG. 1;

fig. 7 shows a schematic view of the clamp spring of fig. 6 in another direction.

Detailed Description

The utility model discloses the technical problem that will solve is: when butt welding is carried out by conventional resistance welding, the error is extremely large when the upper and lower welding arms move due to the influence of the precision of the welding machine; meanwhile, the problems of burn are easily caused by shaking, loose contact and the like of the machine. The utility model discloses the technical thinking that just this technical problem provided is: a welding fixture is constructed, high-precision positioning in the welding motion process is achieved, clamping and positioning are reliable, and therefore good appearance after welding is guaranteed, burn is avoided, and welding precision is high.

In order to make the technical purpose, technical solution and technical effects of the present invention more clear so as to facilitate those skilled in the art to understand and implement the present invention, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 7, fig. 1 is a schematic structural diagram of a welding fixture according to a preferred embodiment of the present invention; FIG. 2 shows a schematic cross-sectional view of the welding fixture of FIG. 1 taken along the line A-A; FIG. 3 illustrates a schematic cross-sectional view of the welding fixture of FIG. 1 in the direction B-B; FIG. 4 is a schematic view of the welding fixture of FIG. 1 in another orientation; FIG. 5 illustrates a cross-sectional view of the weld fixture of FIG. 4 in the direction C-C; FIG. 6 is a schematic diagram of a clamp spring of the welding fixture of FIG. 1; fig. 7 shows a schematic view of the clamp spring of fig. 6 in another direction. The welding fixture comprises a lower template 7, a clamping mechanism, a plurality of connecting columns 4, upper templates 3, a plurality of supporting springs 6 and a conductive plate 1, wherein the clamping mechanism is fixedly arranged on the lower template 7 and used for clamping objects to be welded 10, the connecting columns 4 are vertically arranged and arranged on the lower template 7, the upper templates 3 are respectively sheathed on the connecting columns 4 in a sliding way, the supporting springs 6 correspond to the connecting columns 4 in a one-to-one manner, are respectively sheathed on the corresponding connecting columns 4 and are positioned between the lower template 7 and the upper template 3, and the conductive plate 1 is arranged on the upper template 3; the conductive plate 1 is used to weld the object to be welded 10 and the part to be welded 11 together while being in contact with the part to be welded 11 placed on top of the object to be welded 10 as the upper mold plate 3 is pressed down.

The technical scheme is a basic scheme, and the upper template 3 is accurately lifted through the connecting columns 4; the lower and upper templates 3 and 7 can be contacted or separated by a plurality of supporting springs 6. Meanwhile, through the matching of the lower template 7 and the clamping mechanism, the shaking of the object to be welded 10 is avoided.

Furthermore, an accommodating groove 71 is formed in the top surface of the lower template 7, and a mounting column 72 is formed at the bottom of the accommodating groove 71 in the lower template 7 in a protruding manner; the clamping mechanism comprises a knife handle 12 which is provided with a first through hole 121 and is sleeved on the mounting column 72 through the first through hole 121, and a clamping spring 14 which is axially arranged on the mounting column 72 and penetrates through the first through hole 121;

the clamp spring 14 comprises a base 141 mounted on the mounting post 72 and a plurality of elastic parts 142 uniformly distributed on the base 141 in the circumferential direction; the object to be welded 10 is inserted in the middle of the plurality of elastic parts 142; the clamping mechanism further comprises a lock head 13 which is sleeved on the tool shank 12 in a threaded connection mode, is provided with a second through hole 131 in the axial direction, is sleeved on the clamping spring 14 through the second through hole 131, and is used for enabling the elastic parts 142 to be pressed against the object to be welded 10 through the inner wall of the second through hole 131 when rotating and moving downwards relative to the tool shank 12, so that the object to be welded 10 is fixedly clamped.

In the above technical solution, the locking head 13 is engaged with the shank 12 to lock and fix the clamp spring 14, and the clamp spring 14 is driven to clamp the object to be welded 10.

Further, the inner wall of the second through hole 131 is a truncated cone, and the diameter of the bottom opening of the second through hole 131 is larger than that of the top opening thereof. Due to the orientation of the truncated cone shape, the plurality of elastic parts 142 are pressed against the object 10 to be welded through the inner wall of the second through hole 131.

It is understood that the inner wall of the second through hole 131 is not limited to be frustoconical, and the inner wall of the second through hole 131 may also be frustoconical, etc.

Further, the clamping mechanism also comprises an insulating base plate 8; a third through hole 81 is formed in the insulating pad 8, the insulating pad 8 is accommodated in the accommodating groove 71, and is sleeved on the mounting column 72 through the third through hole 81; the tool shank 12 is supported on the insulating backing plate 8.

Further, the inner wall of the first through hole 121 includes a first section 122 in a shape of a circular truncated cone and a second section 123 coaxially connected with the first section 122 and in a shape of a cylindrical surface; the first section 122 is located above the second section 123; the substrate 141 is in a shape of a truncated cone, and a groove 143 is axially formed at the bottom of the substrate 141; the base 141 is engaged with the first section 122 and is disposed on the mounting post 72 through the groove 143. Here, as the clamp spring 14 is pressed down, the fixing of the base 141 is achieved by the first section 122 and the base 141 cooperating.

Further, the tops of the elastic portions 142 are cooperatively shaped like a circular truncated cone, and are engaged with the inner wall of the second through hole 131.

Furthermore, a fourth through hole 73 is formed in the lower template 7, and the fourth through hole 73 is a threaded hole; the welding fixture further comprises a bottom surface adjusting stud 9 which is in threaded connection with the fourth through hole 73 and is used for adjusting the angle of the bottom surface of the lower template 7. In this embodiment, there are three fourth through holes 73, there are three bottom-surface adjusting studs 9, and the axes of the three fourth through holes 73 are not collinear.

Further, the welding fixture further comprises a guide post 5 which is vertically arranged and installed on the lower template 7, and a fifth through hole 31 corresponding to the guide post 5 is formed in the upper template 3. When the upper die plate 3 descends along the connecting column 4, the levelness of the upper die plate 3 is corrected by the guide columns 5 penetrating into the fifth through holes 31, and the object to be welded 10 is ensured to be in contact with the welding part (not shown) of the conductive plate 1.

Furthermore, the upper template 3 is further provided with a plurality of sixth through holes 32, and the sixth through holes 32 correspond to the connecting columns 4 one by one; the connecting columns 4 are inserted into the corresponding sixth through holes 32.

Furthermore, a seventh through hole 33 is formed in the upper template 3, and the seventh through hole 33 is a stepped hole; the conductive plate 1 is received in the seventh through hole 33 and is fixedly mounted on the step of the seventh through hole 33 by the first screw 2. A limiting groove 82 is formed in the top surface of the insulating base plate 8, and a third through hole 81 is formed in the bottom of the limiting groove 82; the knife handle 12 is supported and arranged on the groove bottom of the limiting groove 82; the insulating base plate 8 is arranged on the lower template 7 through a second screw 21; the welding fixture further comprises a side fixing stud 15, the side fixing stud 15 is installed on the side of the lower template 7 in a threaded mode, penetrates through the insulating base plate 8 and extends into the limiting groove 82, and then the side fixing stud abuts against the side face of the knife handle 12, so that the knife handle 12 abuts against, presses and locks the insulating base plate 8.

The specific operation procedure of the welding fixture of the embodiment is as follows:

before welding, the conductive plate 1 is locked on the upper template 3 through the first screw 2, the insulating base plate 8 is locked on the lower template 7 through the second screw 21, and the knife handle 12 is locked on the insulating base plate 8 through the second screw 21 on the side surface after being placed in the limiting groove 82 of the insulating base plate 8. The clamp spring 14 is placed on the handle 12 and under the locking head 13. After the locking head 13 is slightly screwed, the object 10 to be welded is placed in the middle of the clamping spring 14. The locking head 13 is rotated clockwise by a wrench, the locking head 13 moves downwards relative to the tool shank 12 through threads, so that the clamping spring 14 is driven to move downwards, and the plurality of elastic parts 142 of the clamping spring 14 uniformly move inwards through the taper of the inner wall of the second through hole 131 in the locking head 13, so that the object to be welded 10 is clamped.

Four connecting columns 4 and two guide columns 5 are plugged into the prefabricated holes of the lower template 7 in an interference fit mode, four supporting springs 6 are placed on the connecting columns 4, the upper template 3 is placed above the lower template 7 through the connecting columns 4 and the supporting springs 6, then the whole welding instrument is placed on the workbench surface of the welding instrument, and the whole levelness of the welding fixture is corrected through three bottom surface adjusting studs 9 on the lower template 7. And then put into the portion to be welded 11.

During welding, the welding instrument pushes down the upper die plate 3 together with the current conducting plate 1, the four connecting columns 4 ensure that the upper die plate 3 stably moves downwards, when the guide columns 5 are reached, the levelness of the upper die plate 3 is corrected, and meanwhile, the upper die plate 3 descends to the welding height for welding. After welding an object 10 to be welded, the lock head 13 is rotated counterclockwise to drive the clamping spring 14 to move upward, and the clamping spring 14 is elastically restored, so that the object 10 to be welded is loosened to be taken out conveniently. After being taken out, a new object 10 to be welded is placed in the clamping spring 14, and then the clamping spring 14 is locked again.

When the overall tooling is accurately positioned, the tops of a plurality of elastic parts 142 which are in a circular truncated cone shape and are matched on the clamping spring 14 are clamped into the inner wall of a second through hole 131 on the locking head 13, a substrate 141 at the bottom of the clamping spring 14 is placed into a first through hole 121 in the tool holder 12, when the locking head 13 is locked through threads, the clamping spring 14 is pressed down integrally, the clamping spring 14 contracts inwards due to pressing down to clamp the object 10 to be welded, and the whole clamping spring 14 is similar to a revolving body structure and uniformly and inwards deforms, so that the object 10 to be welded is actively wrapped, the whole object 10 to be welded can be vertically arranged, the object 10 to be welded is vertically arranged on the lower template 7 during each welding, and the part 11 to be welded is arranged on the top of the object 10 to be welded with a 90-degree taper.

Finally, the welding fixture has the problems of shaking, deviation and the like in the moving process, so that the connecting column 4 and the guide column 5 are designed to ensure that the upper template 3 stably moves downwards in the welding process. Therefore, the coaxiality precision is ensured through the scheme.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims (10)

1. The welding fixture is characterized by comprising a lower template (7), a clamping mechanism, a plurality of connecting columns (4), an upper template (3), a plurality of supporting springs (6) and a conductive plate (1), wherein the clamping mechanism is fixedly installed on the lower template (7) and used for clamping objects to be welded (10), the connecting columns (4) are vertically arranged and installed on the lower template (7), the upper template (3) is respectively sleeved on the connecting columns (4) in a sliding manner, the supporting springs (6) are respectively sleeved on the corresponding connecting columns (4) and are positioned between the lower template (7) and the upper template (3), and the conductive plate (1) is installed on the upper template (3); the conductive plate (1) is used for welding the object to be welded (10) and the part to be welded (11) together when being pressed down along with the upper template (3) and being in contact with the part to be welded (11) arranged at the top of the object to be welded (10).

2. The welding fixture according to claim 1, characterized in that a receiving groove (71) is formed on the top surface of the lower template (7), and a mounting column (72) is formed on the lower template (7) in a protruding manner at the bottom of the receiving groove (71); the clamping mechanism comprises a knife handle (12) which is provided with a first through hole (121) and is sleeved on the mounting column (72) through the first through hole (121), and a clamping spring (14) which is axially arranged on the mounting column (72) and penetrates through the first through hole (121);

the clamp spring (14) comprises a base (141) mounted on the mounting column (72) and a plurality of elastic parts (142) uniformly distributed on the base (141) in the circumferential direction; the objects (10) to be welded are inserted in the middle of the plurality of elastic parts (142); the clamping mechanism further comprises a lock head (13) which is in threaded connection with the cutter handle (12), provided with a second through hole (131) in the axial direction, sleeved on the clamping spring (14) through the second through hole (131) and used for pressing the elastic parts (142) against the object to be welded (10) through the inner wall of the second through hole (131) when rotating and moving downwards relative to the cutter handle (12), so that the object to be welded (10) is fixedly clamped.

3. The welding jig according to claim 2, characterized in that the inner wall of the second through hole (131) is frustoconical, and the diameter of the bottom opening of the second through hole (131) is larger than the diameter of the top opening thereof.

4. The welding jig of claim 3, wherein the plurality of elastic portions (142) are formed in a truncated cone shape in a top fit, and fit with an inner wall of the second through hole (131).

5. The welding fixture according to claim 2, characterized in that the clamping mechanism further comprises an insulating shim plate (8); a third through hole (81) is formed in the insulating base plate (8), the insulating base plate (8) is accommodated in the accommodating groove (71) and is sleeved on the mounting column (72) through the third through hole (81); the knife handle (12) is supported and arranged on the insulating backing plate (8).

6. The welding jig according to claim 5, characterized in that the inner wall of the first through hole (121) comprises a first section (122) having a circular truncated cone shape and a second section (123) having a cylindrical shape coaxially connected to the first section (122); the first section (122) is located above the second section (123); the base (141) is in a round table shape, and a groove (143) is formed in the bottom of the base (141) in the axial direction; the substrate (141) is clamped in the first section (122) and sleeved on the mounting column (72) through the groove (143).

7. The welding fixture according to claim 5, characterized in that the top surface of the insulating pad (8) is provided with a limiting groove (82), and the third through hole (81) is provided at the bottom of the limiting groove (82); the cutter handle (12) is supported and arranged on the groove bottom of the limiting groove (82); the insulating base plate (8) is arranged on the lower template (7) through a second screw (21); the welding fixture further comprises a side fixing stud (15), the side fixing stud (15) is installed on the side of the lower template (7) in a threaded mode, penetrates through the insulating base plate (8) and extends into the limiting groove (82), and then the side fixing stud is abutted against the side of the cutter handle (12), so that the cutter handle (12) is abutted against, pressed and locked on the insulating base plate (8).

8. The welding jig of claim 5, characterized in that the upper template (3) is provided with a seventh through hole (33), and the seventh through hole (33) is a stepped hole; the conductive plate (1) is accommodated in the seventh through hole (33) and is fixedly mounted on the step of the seventh through hole (33) by a first screw (2).

9. The welding fixture according to claim 1, wherein a fourth through hole (73) is formed in the lower template (7), and the fourth through hole (73) is a threaded hole; the welding fixture further comprises a bottom surface adjusting stud (9) which is connected in the fourth through hole (73) in a threaded mode and used for adjusting the bottom surface angle of the lower template (7).

10. The welding fixture according to claim 1, further comprising a guide post (5) vertically arranged and mounted on the lower template (7), wherein the upper template (3) is provided with a fifth through hole (31) corresponding to the guide post (5).

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