CN111390365A

CN111390365A - Double-end spot welding machine

Info

Publication number: CN111390365A
Application number: CN202010107695.9A
Authority: CN
Inventors: 王艳宇
Original assignee: Ningbo Minth Automotive Parts Research and Development Co Ltd; Ningbo Xintai Machinery Co Ltd
Current assignee: Ningbo Minth Automotive Parts Research and Development Co Ltd; Ningbo Xintai Machinery Co Ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-07-10

Abstract

The invention provides a double-end spot welding machine, which belongs to the technical field of automatic welding equipment and comprises the following components: a rack unit; a translation unit disposed on the frame; a tweezers unit disposed on the translation unit and movable by the translation unit; and the sharpening unit is movably arranged on the rack unit and can move towards the welding clamp unit. The invention has the beneficial effects that: the welding tongs unit can be efficiently and conveniently polished, so that the difficulty in maintaining the welding tongs is reduced.

Description

Double-end spot welding machine

Technical Field

The invention belongs to the technical field of automatic welding equipment, and relates to a double-end spot welding machine.

Background

In the automobile field, the door frame is used as a main part of an automobile, and when a guide rail and a bracket on the door frame are welded, special spot welding machine equipment and a clamp for milling are generally needed. During each welding, the number of the welding points affects the productivity of the processed product.

For example, a chinese patent with application number 201820001673.2 discloses a spot welding machine, which has the technical scheme key points that the spot welding machine comprises a machine base and two groups of left welding mechanisms and right welding mechanisms which are respectively arranged at the top end of the machine base; the left welding mechanism comprises a left base fixedly arranged on the machine base and a left welding assembly arranged on the left base, the left welding assembly comprises a left rotating plate rotating on the left base, a left air cylinder fixedly arranged on the left base and arranged at one end of the left rotating plate and a left electrode tip arranged at the other end of the left rotating plate, and the left air cylinder drives the left electrode tip to rotate towards or away from the machine base through ascending or descending; the right welding mechanism comprises a right base connected with the base in a sliding mode and a right welding assembly arranged on the right base, the right welding assembly comprises a right cylinder, a right rotating plate and a right electrode tip, the structure of the right cylinder is the same as that of the left welding assembly, and the electrode of the left electrode tip is opposite to that of the right electrode tip.

According to the double-end spot welding machine, the two welding tongs are arranged, so that the working efficiency can be greatly improved, but the number of the welding tongs is two, so that the welding tongs are time-consuming and labor-consuming in grinding, the defect of difficulty in maintenance exists, and a certain improvement space is provided.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a double-head spot welding machine.

The purpose of the invention can be realized by the following technical scheme: a double-headed spot welder comprising:

a rack unit;

a translation unit disposed on the frame;

a tweezers unit disposed on the translation unit and movable by the translation unit;

and the sharpening unit is movably arranged on the rack unit and can move towards the welding clamp unit.

Preferably, the number of the translation units is two, the translation units include a transverse ball screw, a transverse servo motor, a transverse guide rail and a transverse moving seat, the transverse ball screw and the transverse guide rail are fixed on the rack unit and are arranged in parallel, the transverse servo motor is connected with the transverse ball screw, a first nut block and a first sliding block are arranged on the transverse moving seat, the first nut block is movably connected with the transverse ball screw, and the first sliding block is connected with the transverse guide rail in a sliding manner.

Preferably, the translation unit further includes a longitudinal ball screw, a longitudinal servo motor, a longitudinal guide rail and a longitudinal moving seat, the longitudinal ball screw and the longitudinal guide rail are both fixed on the transverse moving seat and are arranged in parallel, the longitudinal servo motor is connected with the longitudinal ball screw, a second nut block and a second sliding block are arranged on the longitudinal moving seat, the second nut block is movably connected with the longitudinal ball screw, and the second sliding block is connected with the longitudinal guide rail in a sliding manner.

Preferably, the number of the welding clamp units is two, and the two welding clamp units are respectively fixed on the two longitudinal moving seats.

Preferably, the sharpening unit comprises a sharpener, a linear guide rail, a telescopic cylinder and a mounting seat, the sharpener is arranged on the mounting seat, the linear guide rail and the telescopic cylinder are both arranged on the rack unit, the mounting seat is slidably arranged on the linear guide rail, and the telescopic cylinder is connected with the mounting seat.

Preferably, the number of the grinding units is two and the grinding units are respectively located on two sides of the rack unit, the linear guide rail and the telescopic cylinder are both arranged along the direction of the longitudinal guide rail, and the grinding device is located below the welding tongs unit.

Preferably, a floating platform is further arranged on the rack unit and arranged below the soldering turret unit.

The preferred, floating platform includes platform frame, lift cylinder and backup pad, it fixes to lift the cylinder in the platform frame and with the backup pad is connected, be provided with the slotted hole on the platform frame, be provided with the supporting seat in the backup pad, the supporting seat is worn to establish in the slotted hole.

Preferably, the platform frame comprises an upper plate body, a lower plate body and a linear bearing, the upper plate body is located above the lower plate body, the supporting plate is located between the upper plate body and the lower plate body, the linear bearing is fixed on the lower plate body, a guide shaft is arranged on the supporting plate, and the guide shaft is arranged in the linear bearing in a penetrating mode.

Preferably, the number of the supporting plates and the number of the slotted holes are at least two, and the upper end of the supporting seat is provided with a bearing which penetrates through the slotted holes.

Compared with the prior art, the invention has the beneficial effects that:

1. the welding tongs unit can be efficiently and conveniently polished, so that the difficulty in maintaining the welding tongs is reduced.

2. The movable structure is adopted to drive the tip grinding device, so that the tip grinding device can be pushed out by the telescopic cylinder or pulled back to the place where the electrode holder unit cannot touch, the electrode cap can be ground more conveniently and efficiently, and the tip grinding device is particularly suitable for the double-end spot welding machine.

3. The position of the clamp can be adjusted through the lifting cylinder, so that the clamp can move up and down, and the clamp is convenient to replace.

4. Two coping units correspond two soldering turret units respectively, and this kind of overall arrangement can ensure that two soldering turret units can both the coping.

5. The telescopic cylinder and the linear guide rail are longitudinally arranged, so that the sharpening device can longitudinally move, namely, the sharpening device can move back and forth, and once sharpening is finished, the sharpening device can retreat to a position where the welding clamp unit cannot touch.

6. When the clamp is mounted or dismounted, the lifting cylinder is lifted, the supporting seat penetrates out of the slotted hole, the bearing is located above the upper plate body, the clamp is in contact with the bearing, the clamp can move forwards or backwards, the clamp is convenient to move to a set position, and then the lifting cylinder descends, so that the clamp moves to the upper plate body.

Drawings

Fig. 1 is a structural view of a double-headed spot welder of the present invention.

Fig. 2 is a schematic view of the double-headed spot welder of the present invention.

Fig. 3 is a schematic structural diagram of the translation unit of the present invention.

Fig. 4 is a schematic structural diagram of the thinning unit of the present invention.

Fig. 5 is a schematic structural diagram of the floating platform of the present invention.

In the figure, 100, a rack unit; 200. a soldering turret unit; 310. a lateral ball screw; 320. a transverse servo motor; 330. a transverse guide rail; 340. a transverse moving seat; 341. a first nut block; 342. a first slider; 350. a longitudinal ball screw; 360. a longitudinal servo motor; 370. a longitudinal guide rail; 380. a longitudinal moving seat; 381. a second nut block; 382. a second slider; 400. a coping unit; 410. a sharpening device; 420. a linear guide rail; 430. a telescopic cylinder; 440. a mounting seat; 500. a floating platform; 510. a platform frame; 511. a slot; 512. an upper plate body; 513. a lower plate body; 514. a linear bearing; 520. a lifting cylinder; 530. a support plate; 531. a supporting seat; 532. a guide shaft; 533. and a bearing.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, a double-headed spot welder includes: the welding clamp device comprises a rack unit 100, a translation unit, a welding clamp unit 200 and a grinding unit 400, wherein the grinding unit 400 can grind the welding clamp unit 200, so that the welding clamp unit 200 can be ground efficiently and conveniently, and the difficulty in maintaining the welding clamp is reduced.

The rack unit 100 has a rack structure, and specifically, the rack unit 100 includes a front rack and a rear rack, which are connected together to form a stepped rack structure.

Preferably, the translation unit can move both in the lateral direction (movement in the X-axis direction) and in the longitudinal direction (movement in the Y-axis direction), so that the soldering turret unit 200 can be driven to a predetermined position.

A holder unit 200 provided on the translation unit, and by which the holder unit 200 is movable; and the electrode holder unit 200 has at least one electrode holder, the electrode holder unit 200 can be moved by the translation unit to spot-weld the workpiece or the jig.

Preferably, the electrode holder unit 200 may actually adopt the existing electrode holder structure, and includes an upper electrode and a lower electrode, or may be called as a male electrode and a female electrode, which are energized after contacting to realize the effect of spot welding, but the electrode may generate a pile deformation and a surface oxidation layer after being used for a long time, which may greatly reduce the effect of spot welding and the efficiency of spot welding.

It should be noted that the sharpening unit 400 is not an independent sharpening device 410, but is combined with the frame unit 100, and can be interactively matched with the translation unit and the welding clamp unit 200, so that the sharpening unit is sharpened without disassembling the welding clamp unit 200.

The grinding unit 400 mainly cuts the electrode cap on the welding tongs through a blade, and in the actual use process, the grinding unit 400 is firstly moved to a set position, and then the welding tongs unit 200 is moved to the position to be ground of the grinding unit 400 through the translation unit, so that the purpose of automatic grinding is achieved, the operation difficulty can be greatly reduced, and the actual grinding is facilitated.

As shown in fig. 1, 2, 3, and 4, in addition to the above embodiment, the number of the translation units is two, and the translation unit includes a transverse ball screw 310, a transverse servo motor 320, a transverse guide rail 330, and a transverse moving base 340, where the transverse ball screw 310 and the transverse guide rail 330 are both fixed on the rack unit 100 and are arranged in parallel, the transverse servo motor 320 is connected to the transverse ball screw 310, the transverse moving base 340 is provided with a first nut block 341 and a first sliding block 342, the first nut block 341 is movably connected to the transverse ball screw 310, and the first sliding block 342 is slidably connected to the transverse guide rail 330.

Preferably, the number of the translation units is two, so that the two welding clamp units 200 can be driven to move, in short, the spot welding machine is a double-head spot welding machine, so that the two welding clamp units 200 are provided, and the two welding clamp units 200 can move independently, so that the two translation units are required to drive.

Preferably, the translation unit can achieve the effect of lateral movement, and the translation unit is disposed on the rear rack of the rack unit 100, which is located on a relatively high platform surface, and the lateral servo motor 320 can drive the lateral ball screw 310 to rotate, a threaded hole is opened at the lower end of the lateral moving base 340 to form a first nut block 341, and the lateral moving base 340 is connected with the lateral ball screw 310 through the first nut block 341, once the lateral ball screw 310 rotates, the lateral moving base 340 can make linear movement, and a first slider 342 is disposed at the lower end of the lateral moving base 340, a first slide rail is disposed on the lateral guide rail 330, which can make the lateral moving base 340 make linear movement, and the lateral guide rail 330 is matched with the lateral ball screw 310 to drive the lateral moving base 340 to move.

As shown in fig. 1, 2, 3, and 4, on the basis of the above embodiment, the translation unit further includes a longitudinal ball screw 350, a longitudinal servo motor 360, a longitudinal guide rail 370, and a longitudinal moving base 380, the longitudinal ball screw 350 and the longitudinal guide rail 370 are fixed on the transverse moving base 340 and are arranged in parallel, the longitudinal servo motor 360 is connected to the longitudinal ball screw 350, the longitudinal moving base 380 is provided with a second nut block 381 and a second slider 382, the second nut block 381 is movably connected to the longitudinal ball screw 350, and the second slider 382 is slidably connected to the longitudinal guide rail 370.

Preferably, the translation unit can achieve the effect of longitudinal movement, and the translation unit is disposed on the transverse moving seat 340, the longitudinal servo motor 360 can drive the longitudinal ball screw 350 to rotate, a threaded hole is opened at the lower end of the longitudinal moving seat 380 to form a second nut block 381, and the longitudinal moving seat 380 is connected with the longitudinal ball screw 350 through the second nut block 381, once the longitudinal ball screw 350 rotates, the longitudinal moving seat 380 can be linearly moved, and a second slider 382 is disposed at the lower end of the longitudinal moving seat 380, a second slide rail is disposed on the longitudinal guide rail 370, which can enable the longitudinal moving seat 380 to be linearly moved, and the longitudinal guide rail 370 and the longitudinal ball screw 350 cooperate to drive the longitudinal moving seat 380 to move.

Preferably, the translation unit can move longitudinally on the basis of the transverse movement, so that the translation unit can drive the welding clamp unit 200 to any position on a plane to perform welding.

As shown in fig. 1, 2 and 3, in the above embodiment, the number of the electrode holder units 200 is two, and the two electrode holder units 200 are respectively fixed to the two longitudinal moving seats 380.

Preferably, the soldering turret units 200 are two in total and are respectively located at the left and right sides of the rack unit 100, and more specifically, the two soldering turret units 200 are respectively located at the two longitudinal moving seats 380, so that the two soldering turret units 200 can be independently moved, and interference is not generated, thereby greatly improving the working efficiency.

Preferably, the electrode holder unit 200 actually belongs to the prior art, and is widely used in various spot welding machines at present, wherein, the electrode holder unit 200 includes lift seat, fixing base, upper electrode and bottom electrode, and the bottom electrode sets up on the fixing base, and the upper electrode sets up on the lift seat to upper electrode and bottom electrode are corresponding setting from top to bottom, can drive the upper electrode and move towards the bottom electrode when the lift seat descends, thereby realize the welding effect.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiment, the sharpening unit 400 includes a sharpener 410, a linear guide 420, a telescopic cylinder 430 and a mounting seat 440, the sharpener 410 is disposed on the mounting seat 440, both the linear guide 420 and the telescopic cylinder 430 are disposed on the rack unit 100, the mounting seat 440 is slidably disposed on the linear guide 420, and the telescopic cylinder 430 is connected to the mounting seat 440.

Preferably, the sharpening unit 400 is not only the sharpener 410, but one set of sharpening unit can be moved as needed, and then the electrode cap of the welding clamp unit 200 is sharpened, specifically, the sharpening unit 400 is moved through the telescopic cylinder 430 and the mounting seat 440, and is guided through the linear guide rail 420 to the mounting seat 440, wherein the telescopic cylinder 430 can push the mounting seat 440 forward or pull the mounting seat 440 backward, so that the sharpener 410 on the mounting seat 440 can be moved to the lower side of the welding clamp unit 200 as needed, and can be pulled back to the original position after finishing sharpening, the sharpening device 410 is prevented from occupying a welding position, so that the sharpening effect can be achieved, and the sharpening device 410 is prevented from interfering with welding of a workpiece.

Preferably, the dresser 410 is actually an existing device, the telescopic cylinder 430 and the linear guide 420 are actually fixed to a front stage of the rack unit 100 and are located below the welding tongs unit 200, the dresser 410 is fixed to the mounting seat 440, the dresser unit 400 further includes a drag chain, an electric wire of the dresser 410 is located in the drag chain, and the dresser 410 is generally located at the rear side of the front stage and does not affect welding of a workpiece, and when dressing is required, the dresser 410 is pushed forward by the telescopic cylinder 430.

It should be noted here that, in the prior art, the spot welder does not have the tip dresser 410, because once the tip dresser 410 is fixed to the spot welder, normal use is seriously affected, and a workpiece cannot be placed below the welding head, or the welding unit may touch the tip dresser 410 during movement, but in this embodiment, a movable structure is adopted to drive the tip dresser 410, so that the tip dresser 410 can be pushed out by the telescopic cylinder 430 or pulled back to a place where the welding pliers unit 200 cannot touch, and thus the electrode cap can be ground more conveniently and efficiently, and the double-head spot welder is particularly suitable for the double-head spot welder.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiment, the sharpening unit 400 is provided in two numbers and is respectively located at both sides of the frame unit 100, the linear guide 420 and the telescopic cylinder 430 are both disposed along the direction of the longitudinal guide 370, and the sharpener 410 is located below the electrode holder unit 200.

Preferably, two coping units 400 correspond two soldering turret units 200 respectively, and this kind of overall arrangement can ensure that two soldering turret units 200 can both be ground to, telescopic cylinder 430 and linear guide 420 all are along vertically setting up for coping ware 410 can longitudinal movement, and coping ware 410 can the back-and-forth movement promptly, in case the coping is finished, just can retreat to the position that soldering turret unit 200 can not touch.

As shown in fig. 1, 2, and 5, in addition to the above embodiment, the frame unit 100 is further provided with a floating platform 500, and the floating platform 500 is disposed below the soldering turret unit 200.

Preferably, the floating platform 500 is used to receive or place the jig, the floating platform 500 is located on a front stage of the rack unit 100, and the floating platform 500 is located below the welding unit, and here, it is worth explaining that the floating platform 500 is used to place the jig, the workpiece is fixed to the jig, and then welding is performed.

As shown in fig. 1, 2 and 5, on the basis of the above embodiment, the floating platform 500 includes a platform frame 510, a lifting cylinder 520 and a supporting plate 530, the lifting cylinder 520 is fixed in the platform frame 510 and connected to the supporting plate 530, a slot 511 is disposed on the platform frame 510, a supporting seat 531 is disposed on the supporting plate 530, and the supporting seat 531 is inserted into the slot 511.

Preferably, can adjust the position of anchor clamps through lifting cylinder 520 for anchor clamps can reciprocate, are convenient for change anchor clamps, and particularly, anchor clamps need move to the position of setting for on, but anchor clamps are more difficult to remove on platform frame 510, so need through lifting cylinder 520 jack-up backup pad 530, hold anchor clamps through supporting seat 531 earlier, then adjust the position of anchor clamps, lifting cylinder 520 descends afterwards, makes anchor clamps fall on platform frame 510, can greatly reduced change anchor clamps's the degree of difficulty like this.

As shown in fig. 1, 2, and 5, on the basis of the above embodiment, the platform frame 510 includes an upper plate 512, a lower plate 513, and a linear bearing 514, the upper plate 512 is located above the lower plate 513, the support plate 530 is located between the upper plate 512 and the lower plate 513, the linear bearing 514 is fixed on the lower plate 513, the support plate 530 is provided with a guide shaft 532, and the guide shaft 532 is inserted into the linear bearing 514.

Preferably, since the linear bearing 514 is provided, the support plate 530 can move between the upper plate body 512 and the lower plate body 513, so that the support base 531 can move up and down, thereby facilitating the replacement of the jig.

In the actual process of replacing the clamp, the clamp is heavy, so that the clamp is not convenient to be directly placed on the platform frame 510 to move, and is difficult to be positioned, to facilitate the replacement of the jig, the support plate 530 may be first lifted by the lifting cylinder 520, so that the supporting base 531 protrudes from the slot 511, and then the jig is placed on the supporting base 531, because the supporting seats 531 can be point-contacted with the clamp, four supporting seats 531 can be arranged, the jig is then supported and then moved so that the jig is in a set position, where the jig does not contact the upper plate 512, then, the lifting cylinder 520 is lowered, the supporting base 531 is retracted into the slot 511, and the clamping apparatus naturally moves downward onto the upper plate 512, thus, the process of installing the clamp is realized, and when the clamp is disassembled, the clamp is jacked up through the lifting cylinder 520, so that the clamp is disassembled.

As shown in fig. 1, 2 and 5, in the above embodiment, the number of the supporting plate 530 and the slot 511 is at least two, and the upper end of the supporting seat 531 is provided with a bearing 533, and the bearing 533 passes through the slot 511.

Preferably, in an actual structure, six slots 511 and a support plate 530 may be provided, since the lifting cylinder 520 can lift the clamp, the clamp can be driven to move up and down, so as to be separated from the upper plate 512, and the clamp also needs to move in a horizontal direction when being installed or removed, so that a bearing 533 needs to be provided on the support plate 530, so that the clamp can move along a rolling direction of the bearing 533, specifically, when the clamp is installed or removed, the lifting cylinder 520 is lifted, so that the support seat 531 penetrates through the slot 511, so that the bearing 533 is located above the upper plate 512, the clamp contacts with the bearing 533, so that the clamp can move forward or backward, so that the clamp moves to a set position, and then the lifting cylinder 520 is lowered, so that the clamp moves to the upper plate 512.

It is also worth noting here that the bearing 533 can limit the left and right freedom of the clamp, so that the clamp can only move back and forth along the bearing 533, and the clamp can be prevented from moving in other directions.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A double-headed spot welder, comprising:

a rack unit;

a translation unit disposed on the frame;

2. A double-headed spot welder as defined in claim 1, wherein: the number of translation unit is two, and the translation unit includes horizontal ball, horizontal servo motor, transverse guide and lateral shifting seat, horizontal ball and transverse guide all fixes on the frame unit and both parallel arrangement, horizontal servo motor with horizontal ball is connected, be provided with first screw block and first slider on the lateral shifting seat, first screw block mobilizable with horizontal ball is connected, first slider with transverse guide sliding connection.

3. A double-headed spot welder as defined in claim 2, wherein: the translation unit further comprises a longitudinal ball screw, a longitudinal servo motor, a longitudinal guide rail and a longitudinal moving seat, the longitudinal ball screw and the longitudinal guide rail are fixed on the transverse moving seat and are arranged in parallel, the longitudinal servo motor is connected with the longitudinal ball screw, a second nut block and a second sliding block are arranged on the longitudinal moving seat, the second nut block is movably connected with the longitudinal ball screw, and the second sliding block is connected with the longitudinal guide rail in a sliding mode.

4. A double-headed spot welder as defined in claim 3, characterized in that: the number of the welding clamp units is two, and the two welding clamp units are respectively fixed on the two longitudinal moving seats.

5. A double-headed spot welder as defined in claim 4, characterized in that: the sharpening unit comprises a sharpener, a linear guide rail, a telescopic cylinder and a mounting seat, the sharpener is arranged on the mounting seat, the linear guide rail and the telescopic cylinder are arranged on the rack unit, the mounting seat is slidably arranged on the linear guide rail, and the telescopic cylinder is connected with the mounting seat.

6. A double-headed spot welder as defined in claim 5, wherein: the number of the grinding units is two and the grinding units are respectively positioned on two sides of the rack unit, the linear guide rail and the telescopic cylinder are arranged along the direction of the longitudinal guide rail, and the grinding device is positioned below the welding clamp unit.

7. A double-headed spot welder as defined in claim 1, wherein: and a floating platform is further arranged on the rack unit and is arranged below the soldering turret unit.

8. A double-headed spot welder as defined in claim 7, wherein: the floating platform comprises a platform frame, a lifting cylinder and a supporting plate, wherein the lifting cylinder is fixed in the platform frame and connected with the supporting plate, a slotted hole is formed in the platform frame, a supporting seat is arranged on the supporting plate, and the supporting seat is arranged in the slotted hole in a penetrating mode.

9. A double-headed spot welder as defined in claim 8, wherein: the platform frame comprises an upper plate body, a lower plate body and a linear bearing, wherein the upper plate body is positioned above the lower plate body, the supporting plate is positioned between the upper plate body and the lower plate body, the linear bearing is fixed on the lower plate body, and a guide shaft is arranged on the supporting plate and penetrates in the linear bearing.

10. A double-headed spot welder as defined in claim 9, wherein: the number of the supporting plates and the slotted holes is at least two, and the upper end of the supporting seat is provided with a bearing which penetrates through the slotted holes.