Spot welding device for welding magnetic circuit part and fixing plate and using method

Abstract

The invention discloses a spot welding device for welding a magnetic circuit part and a fixing plate and a using method. The spot welding device is composed of an electrode insert, a guide part, a lower die part and an auxiliary part. When in use, the auxiliary part is arranged on the upper end surface of the base and is positioned by using the seventh connecting section of the limiting nail and the fifth matching hole of the base; secondly, the magnetic circuit part is installed in the lower die part, a supporting column is limited through a first positioning groove of a check block, a second rotary knob is rotated, a pushing block is pushed to clamp the magnetic circuit part, then a fixing plate is placed on the magnetic circuit part, and the fixing plate is positioned and clamped through a left positioning block and a right positioning block; the guide part is subjected to die assembly through a third matching hole of the first insulation sleeve and a third connecting section of the positioning pin and placed on the end face of the first supporting block, and the welding position is determined; and the electrode insert is arranged in the second matching hole of the guide block, so that the assembly process before welding is completed. The device is stable in welding quality and convenient to operate.

Description

Technical Field

[0001] The invention patent belongs to the field of machinery, and in particular relates to a spot welding device for welding a magnetic circuit part and a fixed plate. Background Art

[0002] In a balanced force contactor, it is often necessary to weld the magnetic circuit part to the two fixed plates. The three-dimensional schematic diagram before and after welding is shown in the figure. Figure 1 , Figure 2 As shown, there are 6 convex bulges distributed in each fixing plate, and all the convex bulges need to be spot welded.

[0003] After welding, the positional relationship between the fixed plate and the magnetic circuit part must be ensured, and the welding must be firm and reliable. During the welding process, a welding procedure must be adopted and the welding point position can be automatically found to reduce the welding difficulty of the operator. Summary of the invention

[0004] The object of the present invention is to provide a device which can clamp the magnetic circuit part and the fixing plate in place before welding, automatically find the welding point position, and complete the welding of two fixing plates with one welding procedure.

[0005] In order to achieve the purpose of the present invention, a spot welding device for welding a magnetic circuit part and a fixed plate is provided herein, comprising: an electrode insert, a guide part, a lower mold part and an auxiliary part.

[0006] The guide part includes a guide block and a first insulating sleeve. The guide block is provided with a first matching hole and a second matching hole. The second connecting section of the first insulating sleeve is pressed into the first matching hole to form an interference fit. The lower mold part includes a base. The base is provided with an insulating block. The insulating block is provided with a pad. The second insulating sleeve is provided in the first step hole of the pad. The first screw is passed through the first through hole of the second insulating sleeve and screwed into the second threaded hole of the base to achieve a fastening connection between the pad, the insulating block and the base. The stopper is provided on the side of the pad, and the first pin and the first screw are used to achieve positioning and locking with the pad.

[0007] The lower mold part also includes a first support block, which is distributed at both ends of the cushion block and is fastened to the cushion block by a first screw; the left positioning block and the right positioning block are respectively distributed in the first support block, and the protective block is distributed on the end face of the first support block and is locked by a first screw. The protective block and the support block have through threaded holes, and the first knob is screwed in from the outer end face of the protective block and connected to the left positioning block and the right positioning block. The position of the positioning block can be moved by rotating the knob. Specifically, the small end of the knob is respectively distributed in the first T-slot of the left positioning block and the third T-slot of the right positioning block, and is screwed into the first threaded hole of the protective block through the fifth connecting section. By rotating the knob, the forward and backward movement of the left positioning block and the right positioning block can be controlled; the fourth connecting section of the positioning pin is vertically pressed into the fourth matching hole of the first support block to form an interference fit and is distributed on the end face of the first support block;

[0008] The lower mold part also includes a second support block, which is distributed on the cushion block and is fastened to the cushion block by a first screw; the pushing block is distributed in the second support block, the cover plate has a through threaded hole, the second knob is screwed in from the outer end surface of the cover plate, and is connected to the pushing block distributed on the inner side of the second support block, and the position of the pushing block can be moved by rotating the knob; specifically, the fifth connecting section of the knob is screwed into the third threaded hole of the cover plate and its small end is distributed in the second T-slot of the pushing block, the cover plate and the support block are locked by a countersunk screw, and the forward and backward movement of the pushing block is controlled by rotating the knob.

[0009] The auxiliary part comprises an auxiliary block and a limiting pin. A sixth matching hole is formed on the auxiliary block. The sixth connecting section of the limiting pin is vertically pressed into the sixth matching hole to form an interference fit.

[0010] Furthermore, the first connecting section of the electrode insert and the second matching hole of the guide block form a clearance fit of (0.04-0.06) mm; the third matching hole of the first insulating sleeve and the third connecting section of the positioning pin form a clearance fit of (0.04-0.06) mm.

[0011] Furthermore, the dimensions A1×B1 of the left positioning block and the dimensions A2×B2 of the right positioning block respectively form a clearance fit of (0.01~0.03) mm with the first square cavity dimensions D1×L1 of the first supporting block; the dimensions A3×B3 of the pushing block form a clearance fit of (0.01~0.03) mm with the second square cavity dimensions D2×L2 of the second supporting block; after assembly, by rotating the knob, the left positioning block, the right positioning block and the pushing block can all move back and forth in a straight line without getting stuck.

[0012] Furthermore, the first groove size of the first support block and the first boss size of the cushion block form a clearance fit of (0.01-0.03) mm; the second groove size of the second support block and the second boss size of the cushion block form a clearance fit of (0.01-0.03) mm.

[0013] Furthermore, the base is made of zirconium-copper material, a fifth matching hole is distributed on the base, and the base and the cushion block are in an insulating state.

[0014] Furthermore, after the mold is closed, the guide part and the lower mold part are in an insulating state (current non-conducting state).

[0015] Furthermore, the first positioning groove of the stopper has a clearance fit of (0.02 to 0.04) with the diameter of the support column of the magnetic circuit part; the size H1 of the second positioning groove of the left positioning block and the size H1 of the third positioning groove of the right positioning block have a clearance fit of (0.02 to 0.04) with the width of the fixed plate; the thickness of the auxiliary block is consistent with the thickness of the fixed plate.

[0016] The first positioning groove of the stopper forms a clearance fit with the diameter of the support column of the magnetic circuit part of (0.02~0.04); the size H1 of the second positioning groove of the left positioning block and the size H1 of the third positioning groove of the right positioning block form a clearance fit with the width size of the fixed plate of (0.02~0.04); the thickness size of the auxiliary block is consistent with the thickness of the fixed plate.

[0017] When using the spot welding device described in the present invention, firstly, the positioning is achieved by using the limiting pins of the auxiliary part and the matching holes of the base, and the auxiliary part is installed on the upper end surface of the base; secondly, the magnetic circuit part is installed in the lower mold part, the first positioning groove of the stopper is used to limit the magnetic circuit part, and the second knob is rotated to move the push block to clamp the magnetic circuit part; further, the fixed plate is placed above the magnetic circuit part, and the left positioning block and the right positioning block are moved by the first knob to position and clamp it; further, the guide part is placed on the upper end surface of the first support block, and the first matching hole of the guide block and the positioning pin are used to limit and close the mold to determine the welding position; further, the electrode insert is installed into the second matching hole of the guide block. The assembly process before welding is completed; further, the device is placed on a spot welding machine, and the corresponding program is set, the spot welding machine is started, and the current flows into the base and the electrode insert respectively, and converges at the welding point, and a welding operation is completed, and then the electrode insert is changed to different insertion positions of the second matching hole for spot welding in succession until the welding of the fixed plate on one side of the magnetic circuit part is completed; further, the guide part and the auxiliary part are taken out, and the left positioning block, the right positioning block and the push block are withdrawn from the clamping position by using the first and second knobs, the magnetic circuit part is taken out, and the above-mentioned assembly steps are repeated after turning it upside down 180°, and the fixed plate on the other side of the magnetic circuit part is spot welded in turn to complete the welding of the entire component.

[0018] The beneficial effects of the present invention are as follows: by using the present invention, current shunting can be avoided during welding, the welding point position can be automatically found, and spot welding of two fixing plates (55) can be completed with one welding procedure, the welding quality is stable and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0020] Figure 1 Schematic diagram of the magnetic circuit and the fixed plate before welding

[0021] Figure 2 Schematic diagram of the magnetic circuit and the fixed plate after welding

[0022] Figure 3 This is an exploded schematic diagram of the spot welding device described in the patent of this invention;

[0023] Figure 4 This is a schematic diagram of the magnetic circuit part and the fixing plate recorded in the patent of this invention;

[0024] Figure 5 This is a schematic diagram of the mold closing after the magnetic circuit part and the fixed plate are installed as recorded in the patent of the present invention;

[0025] Figure 6 A schematic diagram of the electrode insert recorded in the patent of this invention;

[0026] Figure 7 This is the front view of the guide block recorded in the patent of this invention;

[0027] Figure 8 This is a left view of the guide block described in the patent of the present invention;

[0028] Fig. 9 This is a schematic diagram of the first insulating sleeve recorded in the patent of this invention;

[0029] Fig.10 This is the front view of the stopper recorded in the patent of this invention;

[0030] Fig.11 A top view of the stopper recorded in the patent of the present invention;

[0031] Fig.12 This is the front view of the left positioning block recorded in the patent of this invention;

[0032] Fig.13A top view of the left positioning block recorded in the patent of this invention;

[0033] Fig.14 This is a schematic diagram of the positioning pin recorded in the patent of this invention;

[0034] Fig.15 A schematic diagram of the knob recorded in the patent of this invention;

[0035] Fig.16 A schematic diagram of the guard block recorded in the patent of the present invention;

[0036] Fig.17 This is a front view of the first support block recorded in the patent of this invention;

[0037] Fig.18 A top view of the first support block recorded in the patent of the present invention;

[0038] Fig.19 This is the front view of the cushion block recorded in the patent of this invention;

[0039] Fig. 20 A top view of the cushion block described in the patent of the present invention;

[0040] Fig.21 A schematic diagram of an insulating block recorded in the patent of this invention;

[0041] Fig. 22 This is the front view of the base recorded in the patent of this invention;

[0042] Fig.23 A top view of the base recorded in the patent of this invention;

[0043] Fig.24 This is a schematic diagram of the second insulating sleeve recorded in the patent of this invention;

[0044] Fig.25 This is the front view of the push block recorded in the patent of this invention;

[0045] Fig.26 A top view of the push block described in the patent of the present invention;

[0046] Fig. 27 This is a front view of the second support block recorded in the patent of this invention;

[0047] Fig.28 A top view of the second support block described in the patent of this invention;

[0048] Fig.29 This is the front view of the cover plate recorded in the patent of this invention;

[0049] Fig.30 A top view of the cover plate recorded in the patent of this invention;

[0050] Fig.31 This is the front view of the right positioning block recorded in the patent of this invention;

[0051] Fig.32 A top view of the right positioning block recorded in the patent of the present invention;

[0052] Fig.33 A schematic diagram of the auxiliary block recorded in the patent of this invention;

[0053] Fig.34 This is a schematic diagram of the limiting pin recorded in the patent of this invention;

[0054] In the figure: 1-electrode insert, 2-guide block, 3-first insulating sleeve, 4-stopper, 5-left positioning block, 6-positioning pin, 7-first screw, 8-first pin, 9-first knob, 9'-second knob, 10-protection block, 11-first support block, 12-pad, 13-insulating block, 14-base, 15-second insulating sleeve, 16-pushing block, 17-second support block, 18-cover plate, 19-countersunk screw, 20-right positioning block, 21-auxiliary block, 22-limiting nail, 23-first connecting section, 24-first matching hole, 25-second matching hole, 26-second connecting section, 27-third matching hole, 28-first positioning groove, 29-first T-shaped slot, 30-second positioning slot, 31-third connecting section, 32-fourth connecting section, 33-fifth connecting section, 34-first threaded hole, 35-fourth matching hole, 36-first square cavity, 37-first groove, 38-first step hole, 39-first boss, 40-second boss, 41-second threaded hole, 42-fifth matching hole, 43-first through hole, 44-second T-slot, 45-second groove, 46-second square cavity, 47-third threaded hole, 48-third T-slot, 49-third positioning slot, 50-sixth matching hole, 51-sixth connecting section, 52-seventh connecting section, 53-magnetic circuit part, 54-support column, 55-fixed plate. DETAILED DESCRIPTION

[0055] The technical solution claimed for protection by the patent of the present invention is further described in detail here with reference to the accompanying drawings and specific implementation methods.

[0056] like Figure 3-34 As shown, a spot welding device for welding a magnetic circuit part and a fixed plate claimed in the present invention includes the following parts:

[0057] The electrode insert 1 comprises a first connecting section 23;

[0058] The guide block 2 includes a first matching hole 24 and a second matching hole 25;

[0059] The first insulating sleeve 3 includes a second connecting section 26 and a third matching hole 27;

[0060] The second connecting section 26 of the first insulating sleeve 3 is pressed into the first matching hole 24 of the second guide block 2 to form an interference fit and constitute the guiding part of the device.

[0061] The stopper 4 includes a first positioning groove 28;

[0062] The left positioning block 5 includes a first T-shaped groove 29 and a second positioning groove 30;

[0063] The positioning pin 6 includes a third connecting section 31 and a fourth connecting section 32;

[0064] The knob 9 includes a fifth connecting section 33;

[0065] The guard block 10 includes a first threaded hole 34;

[0066] The first support block 11 includes a fourth matching hole 35, a first square cavity 36, and a first groove 37;

[0067] The cushion block 12 includes a first step hole 38, a first boss 39, and a second boss 40;

[0068] Insulation block 13,

[0069] The base 14 includes a second threaded hole 41 and a fifth matching hole 42;

[0070] The second insulating sleeve 15 includes a first through hole 43;

[0071] The push block 16 includes a second T-shaped slot 44;

[0072] The second support block 17 includes a second groove 45 and a second square cavity 46;

[0073] The cover plate 18 includes a third threaded hole 47;

[0074] The right positioning block 20 includes a third T-shaped groove 48 and a third positioning groove 49;

[0075] The base 14 is provided with an insulating block 13, and the insulating block 13 is provided with a cushion block 12. The insulating sleeve 15 is distributed in the first step hole 38 of the cushion block 12, and the first screw 7 is passed through the first through hole 43 of the insulating sleeve 15 and screwed into the second threaded hole 41 of the base 14 to realize the fastening connection between the cushion block 12, the insulating block 13 and the base 14; the stopper 4 is distributed on the side of the cushion block 12, and the first pin 6 and the first screw 7 are used to realize the positioning and locking with the cushion block 12; the first support block 11 is distributed at both ends of the cushion block 12 and is fastened with the first screw 7; the left positioning block 5 and the right positioning block 20 are respectively distributed in the first support block 11, the protective block 10 is distributed on the end surface of the first support block 11 and is locked with the first screw 7, and the small ends of the knob 9 are respectively distributed in the first T-slot 2 of the left positioning block 5 9, the third T-slot 48 of the right positioning block 20, and the fifth connecting section 33 is screwed into the first threaded hole 34 of the guard block 10, and the left positioning block 5 and the right positioning block 20 are controlled to move forward and backward by rotating the knob 9; the fourth connecting section 32 of the positioning pin 6 is vertically pressed into the fourth matching hole 35 of the first support block 11 to form an interference fit and is distributed on the end surface of the first support block 11; the second support block 17 is distributed on the cushion block 12 and is fastened to the cushion block 12 by the first screw 7; the push block 16 is distributed in the second support block 17, the fifth connecting section 33 of the knob 9 is screwed into the third threaded hole 47 of the cover plate 18 and its small end is distributed in the second T-slot 44 of the push block 16, and the cover plate 18 and the support block 17 are locked by the countersunk screw 19, and the forward and backward movement of the push block 16 is controlled by rotating the knob 9. The above parts are assembled to form the lower mold part of the device.

[0076] The auxiliary block 21 includes a sixth matching hole 50;

[0077] The limiting pin 22 includes a sixth connecting section 51 and a seventh connecting section 52;

[0078] The sixth connecting section 51 of the limiting pin 22 is vertically pressed into the sixth matching hole 50 of the auxiliary block 21 to form an interference fit, and constitutes an auxiliary part of the device.

[0079] like Figure 3 As shown, when in use, the auxiliary part is installed on the upper end surface of the base (14) and the seventh connecting section (52) of the limiting pin (21) and the fifth matching hole (44) of the base (14) are used to achieve positioning; secondly, the magnetic circuit part (53) is installed in the lower mold part, the first positioning groove (28) of the stopper (4) is used to limit the support column (53), and the second knob (9') is rotated to push the push block (16) to clamp the magnetic circuit part (53), and then the fixing plate (55) is placed on the magnetic circuit part (53), and the left positioning block (5) and the right positioning block (20) are used to achieve positioning and clamping, as shown in FIG. Figure 4As shown; further, the guide part uses the third matching hole (27) of the first insulating sleeve (3) and the third connecting section (31) of the positioning pin (6) to be molded and placed on the end surface of the first support block (11) to determine the welding position, such as Figure 5 As shown; further, the electrode insert (1) is inserted into the second matching hole (25) of the guide block (2), and the assembly process before welding is completed; further, the device is placed on a spot welding machine, and a corresponding program is set, and the spot welding machine is started, and current flows from the base (14) and the electrode insert (1) respectively, and converges at the welding point, and a welding operation is completed, and then the welding positions are spot welded one by one in sequence until the welding of the fixed plate (55) on one side is completed; further, the guide part and the auxiliary part are taken out, the positioning block is released from the clamping, and the magnetic circuit part is turned upside down by 180 degrees, and the above-mentioned assembly steps are repeated, and the other fixed plate (55) is spot welded in turn, and the welding of the entire component is completed. The spot welding of the fixed plates (55) on both sides is completed by one program, and the welding quality is stable and the operation is convenient.

[0080] The above embodiments are only used to illustrate the technical solution of the patent of the present invention rather than to limit it. Any modification or equivalent substitution made to the technical solution of the patent of the present invention by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the patent of the present invention.

Claims

1. A spot welding device for welding a magnetic circuit part to a fixed plate, characterized in that: The device comprises: an electrode insert (1), a guide part, a lower mold part and an auxiliary part; The guide part comprises a guide block (2) and a first insulating sleeve (3); the guide block (2) is provided with a first matching hole (24) and a second matching hole (25); the first insulating sleeve (3) is pressed into the first matching hole (24); The lower mold part comprises a base (14), on which an insulating block (13) and a cushion block (12) are sequentially arranged, the cushion block (12) is provided with a first step hole (38), a second insulating sleeve (15) is arranged in the step hole, a screw passes through the second insulating sleeve and is screwed into the base (14), so as to realize a fastening connection between the cushion block (12), the insulating block (13) and the base (14); the stopper (4) is vertically arranged on one side of the cushion block (12) and is fastened to the cushion block; a first positioning groove (28) is provided on the inner side surface of the stopper; The lower mold part comprises two first support blocks (11) which are fastened to the left and right ends of the cushion block, the first support block is provided with a left positioning block (5) and a right positioning block (20) respectively inside, the outer end surface of the first support block is provided with a fastened protection block (10), the protection block (10) and the support block (11) have through threaded holes, the first knob (9) is screwed into the outer end surface of the protection block and is connected to the left positioning block (5) and the right positioning block (20), the knob can be rotated to move the position of the positioning block, the upper end surface of the first support block is provided with a positioning pin (6) which is interference-fitted with a vertical press-fitting hole (35), and the positioning pin (6) is matched with a first matching hole (24) of the guide block; The lower mold part also includes a second support block (17) and a cover plate (18) which are fastened to the cushion block (12); the cover plate (18) has a through threaded hole (47); a second knob (9') is screwed into the outer end surface of the cover plate and connected to a push block (16) distributed on the inner side of the second support block (17); the push block can be moved by rotating the knob; The auxiliary part comprises an auxiliary block (21) and a limiting pin (22), and the limiting pin (22) is matched with a matching hole (44) on the base.

2. The spot welding device for welding the magnetic circuit part and the fixing plate according to claim 1, characterized in that: The connection section (23) of the electrode insert (1) and the second matching hole (25) of the guide block (2) forms a clearance fit of (0.04-0.06) mm; the connection section of the first insulating sleeve (3) and the positioning pin (6) forms a clearance fit of (0.04-0.06) mm.

3. The spot welding device for welding the magnetic circuit part and the fixing plate according to claim 1, characterized in that: The dimensions A1×B1 of the left positioning block (5) and the dimensions A2×B2 of the right positioning block (20) respectively match the dimensions D1×L1 of the first square cavity (36) of the first support block (11) with a clearance of (0.01 to 0.03) mm; the dimensions A3×B3 of the push block (16) match the dimensions D2×L2 of the second square cavity (46) of the second support block (17) with a clearance of (0.01 to 0.03) mm; after assembly, by rotating the knob (9, 9'), the left positioning block (5), the right positioning block (20) and the push block (16) can all move back and forth in a straight line without getting stuck.

4. The spot welding device for welding the magnetic circuit part and the fixing plate according to claim 1, characterized in that: The size of the first groove (37) of the first support block (11) and the size of the first boss (39) of the cushion block (12) form a clearance fit of (0.01 to 0.03) mm; the size of the second groove (45) of the second support block (17) and the size of the second boss (40) of the cushion block (12) form a clearance fit of (0.01 to 0.03) mm.

5. A spot welding device for welding a magnetic circuit part to a fixing plate according to claim 1, characterized in that: The base (14) is made of zirconium-copper material, a fifth matching hole (42) is distributed on the base (14), and the base (14) and the cushion block (12) are in an insulating state.

6. The spot welding device for welding the magnetic circuit part and the fixing plate according to claim 1, characterized in that: After the mold is closed, the guide part and the lower mold part are in an insulating state.

7. The spot welding device for welding a magnetic circuit part to a fixing plate according to claim 1, characterized in that: The first positioning groove (28) of the stopper (4) and the diameter dimension of the support column (54) of the magnetic circuit part (53) form a clearance fit of (0.02-0.04); the dimension H1 of the second positioning groove (30) of the left positioning block (5) and the dimension H1 of the third positioning groove (49) of the right positioning block (20) form a clearance fit of (0.02-0.04) with the width dimension of the fixed plate (55); the thickness dimension of the auxiliary block (21) is consistent with the thickness of the fixed plate (55).

8. The method for using the spot welding device for welding the magnetic circuit part and the fixing plate according to claim 1, characterized in that: When in use, the auxiliary part is positioned by using the limiting pin (21) of the auxiliary part and the matching hole (44) of the base (14), and the auxiliary part is installed on the upper end surface of the base (14); secondly, the magnetic circuit part (53) is installed in the lower mold part, and the first positioning groove (28) of the stopper (4) is used to limit the magnetic circuit part (53), and the second knob (9') is rotated to move the push block (16) to clamp the magnetic circuit part (53); further, the fixed plate (55) is placed above the magnetic circuit part (53), and the left positioning block (5) and the right positioning block (20) are moved by the first knob (9) to achieve positioning and clamping; further, the guide part is placed on the upper end surface of the first support block (11), and the first matching hole (24) of the guide block and the positioning pin (6) are used to limit and close the mold to determine the welding position; further, the electrode insert (1) is installed in the guide block. The electrode insert (1) is inserted into the second matching hole (25) of the block (2), thus completing the assembly process before welding; further, the device is placed on a spot welding machine, and a corresponding program is set. The spot welding machine is started, and current flows into the base (14) and the electrode insert (1) respectively, and converges at the welding point, and a welding operation is completed. Then, the electrode insert (1) is changed to different insertion positions in the second matching hole (25) and spot welded successively until the welding of the fixed plate (55) on one side of the magnetic circuit part (53) is completed; further, the guide part and the auxiliary part are taken out, and the left positioning block (5), the right positioning block (20) and the push block (16) are withdrawn from the clamping position using the first and second knobs (9, 9'), and the magnetic circuit part is taken out, and the above-mentioned assembly steps are repeated after turning it upside down 180 degrees, and the fixed plate (55) on the other side of the magnetic circuit part is spot welded in turn to complete the welding of the entire component.

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