CN115178844A

CN115178844A - Upper and lower piece automation device of resistance welding part and resistance welding device comprising same

Info

Publication number: CN115178844A
Application number: CN202210818889.9A
Authority: CN
Inventors: 江有波; 何建华; 郭敬; 林涛; 朱振友
Original assignee: Jiangsu Beiren Intelligent Manufacturing Technology Co ltd
Current assignee: Jiangsu Beiren Intelligent Manufacturing Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-10-14

Abstract

An automation device for loading and unloading electric resistance welding parts and an electric resistance welding device comprising the same. The automatic workpiece feeding and discharging device comprises a first workpiece feeding mechanism, a first base, a servo rotary table, two first part stacking mechanisms and a first unstacking mechanism. The servo turntable is arranged on the first base; the first part stacking mechanism is oppositely arranged on the servo turntable; the first unstacking mechanism comprises a first servo motor, and when one of the two first part stacking mechanisms is in the unstacking position, the first servo motor abuts against the lower part of the one first part stacking mechanism; after the uppermost first component of one of the first component stacking mechanisms is taken away, the first servomotor is pushed up until the uppermost first component is precisely positioned at the taking position. The automatic workpiece feeding and discharging device can effectively unstack and distribute materials, and can ensure the accuracy of the positions of the unstacked parts, thereby ensuring the consistency of the positions of the topmost parts to be taken.

Description

Upper and lower piece automation device of resistance welding part and resistance welding device comprising same

Technical Field

The present invention relates to a device for loading and unloading electric resistance welding parts and an electric resistance welding device including the same, and more particularly, to an automated device for loading and unloading electric resistance welding parts and an electric resistance welding device including the same.

Background

Nowadays, with the continuous development of technologies, on one hand, the demand for intelligent automation of industrial production is higher and higher, and on the other hand, the demand for rapid switching of different products in flexible production of factories is higher and higher. Under the condition of meeting production requirements, the method realizes gradual reduction of cost, gradual improvement of automation degree, reduction of error rate in the production process and the like.

Most of the existing resistance welding in a factory is carried out manually, and then a robot carries out welding. However, this approach has the following disadvantages: 1. the welding workers at each time need to be welded for the last time: the workman is gone up once, and the robot welding is once, and the workman gets the piece after the welding is accomplished, then goes up again, and efficiency is lower. 2, manual repeated labor: workers are subjected to repeated labor all the time, fatigue is easy to occur, and errors can occur.

Therefore, it is necessary to provide an efficient and automatic device for loading and unloading electric resistance welding parts and an electric resistance welding device including the same.

Disclosure of Invention

The invention aims to solve the problems of low efficiency and unsafe performance in a resistance welding device.

In order to achieve one of the above objects, an embodiment of the present invention provides an automatic loading and unloading apparatus for resistance welding parts.

The automatic device for loading and unloading workpieces comprises a first workpiece loading mechanism, wherein the first workpiece loading mechanism comprises:

a first base;

the servo turntable is arranged on the first base;

the two first part stacking mechanisms are oppositely arranged on the servo rotary table; and

the first unstacking mechanism comprises a first servo motor, and when one of the two first part stacking mechanisms is in the unstacking position, the first servo motor abuts against the lower part of the one first part stacking mechanism;

after the uppermost first part of the one of the first part stacking mechanisms is taken away, the first servo motor pushes up until the uppermost first part is accurately positioned at the taking position.

As an alternative solution, when one of the two first part stacking mechanisms is in the unstacking position, a worker loads the other batch of the two first part stacking mechanisms.

As an optional technical solution, after the uppermost one of the first parts stacking mechanisms is removed, the first servomotor pushes up a stroke of a distance difference of the first parts.

As an optional technical solution, the piece loading and unloading automation device further includes a mechanical turntable and at least one robot, the mechanical turntable is provided with a positioning fixture, and one of the robots takes away one of the uppermost first parts of the one of the first part stacking mechanisms and places the first part on the positioning fixture.

As an optional technical solution, the automatic device for loading and unloading further includes a second loading mechanism, and the second loading mechanism includes:

a second base;

the second part stacking mechanism is arranged on the second base; and

the second mechanism of breaking a jam set up in on the second base, the second mechanism of breaking a jam includes slip table mechanism and pneumatic mechanism, in when second part stack mechanism is in the position of breaking a jam, slip table mechanism level ground parallel and level in a second part of the below of second part stack mechanism, the second part of below is by slip table mechanism ejecting extremely pneumatic mechanism, pneumatic mechanism jacking until the second part is by accurate positioning.

As an optional technical solution, the second workpiece feeding mechanism further includes a third part stacking mechanism, the third part stacking mechanism is disposed in the second part stacking mechanism in parallel, a lowermost third part of the third part stacking mechanism is flush with a lowermost second part of the second part stacking mechanism, the sliding table mechanism simultaneously ejects the lowermost third part and the lowermost second part, and the pneumatic mechanism simultaneously performs accurate positioning of the two, the mechanical turntable rotates by 90 °, another one of the at least one robot takes the accurately positioned part away to the positioning fixture, and the positioning fixture clamps and positions the precisely positioned part.

As an optional technical solution, the upper and lower piece automation device further includes a belt line, and one of the at least one robot takes out the welded part to the belt line.

As an optional technical scheme, the mechanical rotary table is a gas-electric sliding table, and the gas-electric sliding table is provided with a gas-electric sliding ring.

As an optional technical solution, the mechanical turntable is provided with four positioning fixtures.

The invention also provides a resistance welding device which comprises an industrial robot and any one of the automatic workpiece loading and unloading devices, wherein after the positioning fixture clamps and positions the part, the mechanical rotary table rotates by 90 degrees to a welding position, the industrial robot performs welding, the mechanical rotary table rotates by 90 degrees to a workpiece unloading position, and one robot of at least one robot takes out the welded part to the belt line.

Compared with the prior art, the automatic workpiece loading and unloading device can effectively unstack and distribute materials, can ensure the accuracy of the positions of the unstacked parts, and further ensures the consistency of the positions of the uppermost parts to be taken, thereby realizing the high-efficiency and high-stability workpiece loading action. In addition, only workers are involved in batch loading, and the safety and stability in the production process are greatly improved through automatic loading and unloading actions. In addition, two stacking mechanisms of the first piece feeding mechanism can feed pieces in batches in turn, and the second piece feeding mechanism can be provided with the stacking mechanisms in parallel, so that the working efficiency can be improved. In order to further improve the production efficiency and the production continuity, the mechanical turntable can be provided with 4 sets of positioning clamps.

Drawings

FIG. 1 is a schematic view of a lower and upper automation device of the present invention;

FIG. 2 is a schematic view of another perspective of the lower and upper piece automation device of FIG. 1;

FIG. 3 is a schematic view of a first upper member mechanism of the upper and lower member automation device of FIG. 1;

FIG. 4 is an enlarged schematic view of the components of the circular mark of FIG. 3;

FIG. 5 is a schematic view of a second part loading mechanism of the part loading and unloading robot of FIG. 1;

FIG. 6 is a schematic view of the pneumatic mechanism in the second upper member mechanism of FIG. 5;

FIG. 7 is a schematic view of the engagement of the second part, the third part and a robotic gripper;

FIG. 8 is a schematic view from another perspective of the second upper member mechanism of FIG. 5;

FIG. 9 is a schematic view of the second part stacking mechanism of FIG. 8;

FIG. 10 is a schematic cross-sectional view of the second part stacking mechanism of FIG. 9;

FIG. 11 is a schematic view of the third part stacking mechanism of FIG. 8;

FIG. 12 is a schematic cross-sectional view of the third part stacking mechanism of FIG. 11;

fig. 13 is a schematic view of the slide table mechanism in fig. 8;

FIG. 14 is a schematic view of a mechanical slide of the parts feeder/unloader robot of FIG. 1;

FIG. 15 is an enlarged schematic view of the inside of the circle mark in FIG. 14;

FIG. 16 is a schematic view of a robot of the top and bottom piece of automation device of FIG. 1;

FIG. 17 is an exploded view of the parts;

fig. 18 is a schematic view of the parts after welding.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to the detailed description of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

For convenience in explanation, the description herein uses terms indicating relative spatial positions, such as "upper," "lower," "rear," "front," and the like, to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "above" other elements or features would then be oriented "below" or "above" the other elements or features. Thus, the exemplary term "below" can encompass both a spatial orientation of below and above.

Please refer to fig. 1 to fig. 18.

The automatic device 1 for loading and unloading electric resistance welding parts comprises a first loading mechanism 2, a second loading mechanism 3, a mechanical rotary table 4 and a robot 5. The mechanical turret 4 has a positioning jig 41 thereon.

The first part feeding mechanism 2 comprises a first base 21, a servo turntable 22, two first part stacking mechanisms 23 and a first unstacking mechanism 24.

The servo turntable 22 is provided on the first base 21. Two first part stacking mechanisms 23 are oppositely disposed on the servo turntable 22.

The first unstacking mechanism 24 comprises a first servomotor which abuts against the underside of one of the two first part stacking mechanisms when the one of the two first part stacking mechanisms is in the unstacking position. After the uppermost first part of one of the first part stacking mechanisms is taken away, the first servo motor pushes up until the uppermost first part is accurately positioned at the taking position.

Specifically, two first part stacking mechanisms 23 are used for storing batches of first parts 61, and after the first parts 61 on the first part stacking mechanism 23 on one side of the first servo motor of the first unstacking mechanism 24 are taken out, the servo rotary table 22 rotates to turn the manually-finished first parts in the first part stacking mechanism 23 on the other side into the first part stacking mechanism 23 for taking out, and then the manually-finished first part stacking mechanism 23 which is turned out loads the parts in batches. That is, when one of the two first part stacking mechanisms is in the unstacking position, the worker loads the other batch of the two first part stacking mechanisms. Thus, the working efficiency can be greatly improved.

And after the uppermost first part 61 of one of the first part stacking mechanisms is removed, the first servo motor lifts up a stroke of a distance difference of one part (the distance is the distance for ensuring the position of the uppermost part and is not the actual thickness of the part) so as to ensure the consistency of the position of the uppermost part to be removed. Then, the corresponding robot 51 carries the gripper 511 to pick up the workpiece, and then directly moves onto the positioning jig 41 on the mechanical turret 4, that is, one of the robots 51 picks up the uppermost one of the first parts of the one of the first part stacking mechanisms and places the one of the first parts on the positioning jig 41. Here, the gripper 511 is fixed to a six-axis flange surface of the robot 51, and performs a work of picking and placing a workpiece.

So, two first part stacking mechanisms of first mechanism of loading can use in turn, and can break a jam effectively and divide the material to can guarantee the accuracy nature of part position after breaking a jam, and then guarantee the top and wait to get the uniformity of part position, thereby realize the action of loading of high efficiency, high stability. Moreover, only workers are involved in batch loading, so that the safety and the stability are greatly improved.

The workpiece taking of the first workpiece-loading mechanism 2 is from top to bottom, that is, the workpiece is taken from the top part every time, and if the workpiece taking mode from bottom to top is adopted, the mode of the second workpiece-loading mechanism 3 can be adopted. The second workpiece feeding mechanism 3 includes a second base 31, a second part stacking mechanism 32, a slide table mechanism 34, and a pneumatic mechanism 35.

The second part stacking mechanism 32 is provided on the second base 31. The second mechanism of unstacking sets up on second base 31, and the second mechanism of unstacking includes slip table mechanism 34 and pneumatic means 35, and when second part stacking mechanism was in the position of unstacking, slip table mechanism 34 horizontal parallel and level in second part stacking mechanism 32 a second part 62 of below, second part 62 of below is ejecting to pneumatic means 35 by slip table mechanism 34, and pneumatic means 35 jacking is until second part 62 is by accurate positioning.

To improve the efficiency, a plurality of part stacking mechanisms can be designed on the second loading mechanism 3 for loading parts simultaneously. In this embodiment, the second workpiece feeding mechanism 3 further includes a third part stacking mechanism 33, the third part stacking mechanism 33 is disposed in the second part stacking mechanism 32, a lowermost third part 63 of the third part stacking mechanism 33 is flush with a lowermost second part 62 of the second part stacking mechanism 32, and the sliding table mechanism 34 simultaneously ejects the lowermost third part 63 and the lowermost second part 62.

Specifically, as shown in fig. 9, the second part stacking mechanism 32 has a push-out mechanism 321 corresponding to the position of the lowermost second part, and the push-out mechanism 321 is slidably fixed to the main body of the second part stacking mechanism 32, and the push-out mechanism 321 is fixedly arranged on the slide table mechanism 34, and the slide table mechanism 34 slidably drives the push-out mechanism 321 to push out the lowermost second part 62 of the second part stacking mechanism 32. Similarly, the third stacking mechanism 33 also has a pushing structure 331, which is the same as that of 321 and will not be described again.

As shown in fig. 13, the slide table mechanism 34 has an ejecting cylinder 341, and the pushing

mechanism

321 and 331 fixed on the slide table mechanism 34 are driven by a pushing rod or the like to slide.

At the same time, the pneumatic mechanism 35 can perform the precise positioning of both, and then the mechanical turntable is rotated 90 °, for example, counterclockwise in fig. 2, the positioning fixture 41 is moved from the first upper position a to the second upper position B, the other 52 of the at least one robot takes the precisely positioned part to the positioning fixture 41, and the positioning fixture 41 is clamped and positioned, at which time, all parts of the assembly part 6 are clamped and positioned.

The part loading and unloading automation apparatus 1 further includes a belt line (not shown) to which one robot 53 of the at least one robot takes out the welded assembly part, so that the automated part unloading operation can be performed.

The process of resistance welding, including the upper, welding and lower pieces, is generally described below. The resistance welding device comprises the automatic workpiece loading and unloading device 2 and an industrial robot for welding.

The worker carries the first part 61 on one first part stacking mechanism 23, the servo turntable 22 rotates by 180 °, and the other first part stacking mechanism 23 carries the parts into the work station. And the first part stacking mechanism 23 is turned out first, and the worker continues to load the parts thereon, that is, the two first part stacking mechanisms 23 can be used alternately. At this time, the first servomotor of the first unstacking mechanism 24 pushes the parts upward to ensure that the uppermost part reaches the pickup position. Thereafter, each time a part is removed, the first servomotor advances a stroke of the part by a difference in the distance of the part (this distance is the distance that ensures the position of the uppermost part, and is not the actual thickness of the part). The robot 51 takes the gripper 511 to pick up the workpiece and then directly puts it on the positioning jig 41 on the mechanical turret 4.

Meanwhile, a worker puts the second part 62 and the third part 63 on the second workpiece feeding mechanism 3, the sliding table mechanism 34 slides to unstack the second part 62 and the third part 63, and the pneumatic mechanism 35 lifts up to accurately position the second part 62 and the third part 63. Another robot 52 takes the second part 62 and the third part 63 after fine positioning with a gripper 521. At this time, the mechanical turret 4 needs to rotate 90 ° (from the first loading position a to the second loading position B), and then the gripper 521 loads the second part and the third part onto the positioning fixture 41 on the mechanical turret 4, and the fixture clamps the parts, so that the parts are positioned on the positioning fixture 41.

The mechanical turret 4 is then rotated through 90 deg. (from the second upper position B to the welding position C) and the positioned part reaches the welding position. An industrial robot (not shown) carries the spot welding gun for welding.

After welding, the mechanical turret 4 is rotated by 90 degrees (from the welding position C to the workpiece discharging position D), the robot 53 takes the welded assembly part 6 and puts it on a belt line (not shown), and the part is conveyed to the outside of the station and the worker takes the part.

Therefore, the automatic feeding, welding and discharging actions can be completed through the resistance welding device, and the working efficiency and the safety can be ensured.

Since the mechanical turret 4 is always selected in one direction, an electro-pneumatic slip ring 42 (shown in fig. 15) is required to make the transition in order to prevent twisting and breakage of the air tube and cables. Namely, the mechanical turntable 4 is an electro-pneumatic sliding table having an electro-pneumatic sliding ring 42. And the gas-electric sliding table is divided into two parts: the fixed part is fixed, the rotating part rotates along with the turntable, and normal work of gas and electricity can be guaranteed in the rotating process.

In order to further improve the production efficiency and the production continuity in the working process, a plurality of sets (for example, 4 sets) of positioning fixtures 41 are arranged on the mechanical rotary table 4, and each fixture carries out the work of loading, welding and unloading in turn.

In conclusion, the automatic workpiece loading and unloading device can effectively perform unstacking and material distribution, can ensure the accuracy of the position of the unstacked part, and further ensures the consistency of the position of the topmost part to be taken, thereby realizing the workpiece loading action with high efficiency and high stability. In addition, only workers are involved in batch loading, and the safety and stability in the production process are greatly improved through automatic loading and unloading actions. In addition, two stacking mechanisms of the first piece feeding mechanism can feed pieces in batches in turn, and the second piece feeding mechanism can be provided with the stacking mechanisms in parallel, so that the working efficiency can be improved. In order to further improve the production efficiency and the production continuity, the mechanical turntable can be provided with 4 sets of positioning clamps.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A piece automation device from top to bottom for resistance welding part, characterized in that, piece automation device from top to bottom includes a first mechanism of loading, a first mechanism of loading includes:

a first base;

the servo turntable is arranged on the first base;

2. A workpiece loading and unloading automation device according to claim 1, characterised in that when one of the two first part stacking mechanisms is in the unstacking position, a worker loads another batch of workpieces in one of the two first part stacking mechanisms.

3. A workpiece loading and unloading robot as claimed in claim 1, wherein said first servomotor pushes up a stroke of a distance difference of the first parts after the uppermost one of said first part stacking mechanisms is removed.

4. A lower and upper automation device as set forth in claim 1 further comprising a mechanical turret and at least one robot, said mechanical turret having a positioning fixture thereon, one of said robots taking an uppermost one of said first parts stacking mechanism and placing it on said positioning fixture.

5. A lower and upper automation device according to claim 4 further comprising a second upper mechanism comprising:

a second base;

the second part stacking mechanism is arranged on the second base; and

6. The automatic piece loading and unloading device according to claim 5, wherein the second piece loading mechanism further comprises a third piece stacking mechanism, the third piece stacking mechanism is arranged in parallel with the second piece stacking mechanism, a lowermost third piece of the third piece stacking mechanism is flush with a lowermost second piece of the second piece stacking mechanism, the sliding table mechanism simultaneously ejects the lowermost third piece and the lowermost second piece, the pneumatic mechanism simultaneously carries out accurate positioning of the lowermost third piece and the lowermost second piece, the mechanical turntable rotates 90 degrees, the other robot takes the precisely positioned piece away to the positioning fixture, and the positioning fixture clamps and positions the precisely positioned piece.

7. A lower and upper automation device as set forth in claim 4 further comprising a belt line to which one of said at least one robot takes out welded parts.

8. A loading and unloading automation device according to claim 4, wherein the mechanical turntable is a gas-electric slide table having a gas-electric slide ring.

9. A lower and upper automation device according to claim 4 wherein the mechanical turntable has four positioning fixtures thereon.

10. An electric resistance welding apparatus, characterized in that the electric resistance welding apparatus comprises an industrial robot and a workpiece loading and unloading automation apparatus according to one of claims 4 to 9, the mechanical turret rotates 90 ° to a welding position after the positioning jig clamps the positioning part, the industrial robot performs welding, the mechanical turret rotates 90 ° to a workpiece unloading position again, and one robot of the at least one robot takes out the welded part to the belt line.