CN219900623U

CN219900623U - Projection welding device with error-proof detection of nuts

Info

Publication number: CN219900623U
Application number: CN202321613203.9U
Authority: CN
Inventors: 黄杰大
Original assignee: GAC Honda Automobile Co Ltd
Current assignee: GAC Honda Automobile Co Ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-10-27
Anticipated expiration: 2033-06-21

Abstract

The utility model relates to the technical field of projection welding machines, in particular to a projection welding device with error-proof detection of nuts. Comprises a machine body, a controller, a first driving mechanism, a second driving mechanism, an upper electrode, a lower electrode and a stroke detection device; the first driving mechanism is arranged on the machine body, and the upper electrode is connected with the driving end of the first driving mechanism to drive the upper electrode to move up and down; the second driving mechanism is arranged on the machine body, and the lower electrode is connected with the driving end of the second driving mechanism to drive the lower electrode to move up and down; stroke detection devices are arranged on the upper electrode and the lower electrode; the first driving mechanism, the second driving mechanism and the travel detection device are all in communication connection with the controller. According to the utility model, whether the nut is misplaced or not is judged by detecting the displacement of the upper electrode and the lower electrode, the operation is simple, the problem of misplacing the nut in the welding process can be effectively prevented, the production quality is improved, and the efficiency is also improved.

Description

Projection welding device with error-proof detection of nuts

Technical Field

The utility model relates to the technical field of projection welding machines, in particular to a projection welding device with error-proof detection of nuts.

Background

The projection welding process is widely applied to the automobile manufacturing industry, and with the development of the market and the continuous increase of products, particularly common products are products formed by welding metal parts and nuts, and the differences among the products are mainly different in the types and directions of the welding of the nuts.

Because the projection welding equipment needs manual operation, deviation and even missing welding easily occur to the model and the direction of the welding of the confirmation nut in the manual operation process, so that parts are repaired or scrapped, the cost is increased, and the risk of serious quality accidents caused to subsequent production is increased. In the nut welding process, the traditional detection method adopts a manual detection method for error prevention of the nut, the error parts cannot be detected 100%, and the following errors (1) are frequently caused by error of nut specifications; (2) reversely welding nuts; (3) the defect modes such as nut stitch welding and the like cause great trouble to normal production and cause serious economic loss.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a projection welding device with nut error prevention detection, which can effectively avoid the situation of welding errors of nuts in the welding process.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a projection welding device with nut error prevention detection comprises a machine body, a controller, a first driving mechanism, a second driving mechanism, an upper electrode, a lower electrode and a stroke detection device; the first driving mechanism is arranged on the machine body, and the upper electrode is connected with the driving end of the first driving mechanism to drive the upper electrode to move up and down; the second driving mechanism is arranged on the machine body, and the lower electrode is connected with the driving end of the second driving mechanism to drive the lower electrode to move up and down; stroke detection devices are arranged on the upper electrode and the lower electrode; the first driving mechanism, the second driving mechanism and the travel detection device are all in communication connection with the controller.

According to the technical means, before the nut welding, the maximum displacement and the minimum displacement of the upper electrode and the lower electrode are set according to the specification of the nut; detecting displacement of the upper electrode and the lower electrode by a stroke detecting device; when welding, place the panel on the lower electrode, put the nut on the lower electrode, start welding, first actuating mechanism drive upper electrode descends, contacts with the nut, presses down the nut and is in the panel laminating, realizes the welding. If the nut is placed incorrectly, such as specification error, direction error, multiple placement and the like, the displacement of the upper electrode falling is influenced, and if the displacement value is different from the set value, the error prevention of the nut is indicated; according to the device provided by the utility model, the welding error of the nut can be effectively avoided, the production quality is improved, and the efficiency is improved.

In one embodiment, the travel detection device comprises a first photoelectric displacement sensor and a second photoelectric displacement sensor; the first photoelectric displacement sensor is arranged on the upper electrode, and the second photoelectric displacement sensor is arranged on the lower electrode; the first photoelectric displacement sensor and the second photoelectric displacement sensor are both in communication connection with the controller.

In one embodiment, the first driving mechanism is a first cylinder, the first cylinder is fixed on the frame, and one end of the upper electrode is connected with the driving end of the first cylinder; the second driving mechanism is a second air cylinder, the second air cylinder is fixed on the frame, and one end of the lower electrode is connected with the driving end of the second air cylinder; the upper electrode and the lower electrode are vertically arranged, and the other end of the upper electrode is opposite to the other end of the lower electrode. The upper electrode is positioned right above the lower electrode, and the upper electrode and the lower electrode are both in cylindrical structures and are vertically arranged; when the first driving mechanism drives the upper electrode to move downwards, the end part of the upper electrode can be just pressed on the end part of the lower electrode, and the two end surfaces can be completely overlapped and tightly attached. The cylinder drives the electrode to move up and down, so that the structure is simple, the driving process is stable, and shaking is not easy to occur.

In one embodiment, a positioning mechanism is arranged at one end of the lower electrode, and the positioning mechanism is positioned at one end of the upper electrode. The positioning mechanism is used for positioning the plate and the nut, so that the plate and the nut can not deviate in the welding process conveniently.

In one embodiment, the positioning mechanism comprises a positioning pin vertically mounted at the end of the lower electrode; the stroke detection device further comprises a third photoelectric displacement sensor, the third photoelectric displacement sensor is arranged on the locating pin, and the third photoelectric displacement sensor is electrically connected with the controller. The end of the lower electrode is provided with a blind hole, the locating pin is inserted into the blind hole, the bottom of the locating pin is provided with an elastic piece, and pressure is applied to the locating pin, so that the locating pin can move up and down in the blind hole. When the nut is welded, the nut is placed on the locating pin, so that the nut is positioned, the upper electrode descends, the nut is pressed to move downwards, and the locating pin moves downwards together at the moment, so that the nut is in contact with the plate to realize welding; the descending displacement of nuts with different specifications is different, and whether the problem of misplacement of the nuts occurs is judged by detecting the displacement of the locating pin.

In one embodiment, the positioning mechanism further comprises a positioning plate for placing a plate to be welded to turn on one side; the locating plate is transversely arranged at the end part of the lower electrode. Because the end area of the lower electrode is smaller, when the plate is placed, the plate is easy to shake and roll over, and the supporting surface of the lower electrode is enlarged by arranging the positioning plate, so that the plate is positioned.

In one embodiment, the positioning plate is provided with a mounting hole, the positioning plate is sleeved on the lower electrode through the mounting hole, and the upper end face of the positioning plate is flush with the end face of the lower electrode. Can combine the structure of panel on the locating plate, set up the boss, the location when being convenient for panel to place.

In one embodiment, the positioning pin is positioned at the center of one end face of the lower electrode; the locating plate is arranged perpendicular to the lower electrode.

In one embodiment, the controller is a PLC controller and the lower electrode is located directly below the upper electrode.

In one embodiment, the system further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the controller. After the stroke detection device senses the controller by the detected displacement value, the controller judges the value, if the value is different from the value which is set by the implementation, an alarm is triggered, and the audible and visual alarm gives out sound and light to alarm to remind a user.

The beneficial effects are that: according to the projection welding device with the error-proof detection of the nuts, whether the nuts are misplaced or not is judged through the detection of the displacement of the upper electrode and the displacement of the lower electrode, the operation is simple, the problem that the misplaced nuts occur in the welding process can be effectively prevented, the production quality is improved, and the efficiency is also improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

FIG. 2 is a schematic view of the structure of the lower electrode and positioning mechanism of the present utility model.

Fig. 3 is a schematic diagram of the working principle of the upper electrode in normal welding.

Fig. 4 is a schematic diagram of the working principle of the upper electrode when the nut is error-proof.

Fig. 5 is a schematic diagram of the working principle of the lower electrode in normal welding.

Reference numerals: 1. a body; 2. a controller; 3. a first driving mechanism; 4. a second driving mechanism; 5. an upper electrode; 6. a lower electrode; 7. a positioning pin; 8. a positioning plate; 9. a nut; 10. a sheet material.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. The utility model is described in one of its examples in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances. In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time.

Example 1:

as shown in fig. 1, a projection welding device with nut error prevention detection comprises a machine body 1, a controller 2, a first driving mechanism 3, a second driving mechanism 4, an upper electrode 5, a lower electrode 6 and a stroke detection device; the first driving mechanism 3 is arranged on the machine body 1, and the upper electrode 5 is connected with the driving end of the first driving mechanism 3 to drive the upper electrode 5 to move up and down; the second driving mechanism 4 is arranged on the machine body 1, and the lower electrode 6 is connected with the driving end of the second driving mechanism 4 to drive the lower electrode 6 to move up and down; stroke detection devices are arranged on the upper electrode 5 and the lower electrode 6; the first driving mechanism 3, the second driving mechanism 4 and the travel detection device are all in communication connection with the controller 2.

According to the technical means, before the welding of the nut 9, the maximum displacement and the minimum displacement of the upper electrode 5 and the lower electrode 6 are set according to the specification of the nut 9; detecting the displacement of the upper electrode 5 and the lower electrode 6 by a stroke detecting device; during welding, the plate 10 is placed on the lower electrode 6, the nut 9 is placed on the lower electrode 6, welding is started, the first driving mechanism 3 drives the upper electrode 5 to descend and contact with the nut 9, and the nut 9 is pressed down to be attached to the plate 10, so that welding is achieved. If the nut 9 is placed incorrectly, such as specification error, direction error, multiple placement, etc., the displacement of the upper electrode 5 is affected, and when the displacement value is different from the set value, the nut 9 is indicated to be error-proof; according to the device provided by the utility model, the welding error of the nut 9 can be effectively avoided, the production quality is improved, and the efficiency is improved.

Specifically, the stroke detection device comprises a first photoelectric displacement sensor and a second photoelectric displacement sensor; the first photoelectric displacement sensor is arranged on the upper electrode 5, and the second photoelectric displacement sensor is arranged on the lower electrode 6; the first photoelectric displacement sensor and the second photoelectric displacement sensor are both in communication connection with the controller 2.

As shown in fig. 1, the first driving mechanism 3 is a first cylinder, the first cylinder is fixed on the frame, and one end of the upper electrode 5 is connected with the driving end of the first cylinder; the second driving mechanism 4 is a second cylinder, the second cylinder is fixed on the frame, and one end of the lower electrode 6 is connected with the driving end of the second cylinder; the upper electrode 5 and the lower electrode 6 are vertically arranged, and the other end of the upper electrode 5 is arranged opposite to the other end of the lower electrode 6.

As shown in fig. 1 and 2, a positioning mechanism is provided at one end of the lower electrode 6, and the positioning mechanism is located at the end of the upper electrode 5. The positioning mechanism is used for positioning the plate 8 and the nut 9, so that the plate 10 and the nut 9 can not deviate conveniently in the welding process.

As shown in fig. 1, the positioning mechanism comprises a positioning pin 7, and the positioning pin 7 is vertically arranged at the end part of the lower electrode 6; the stroke detection device further comprises a third photoelectric displacement sensor, the third photoelectric displacement sensor is arranged on the positioning pin 7, and the third photoelectric displacement sensor is electrically connected with the controller 2. A blind hole is formed in the end portion of the lower electrode 6, a positioning pin 7 is inserted into the blind hole, an elastic piece is arranged at the bottom of the positioning pin 7, and pressure is applied to the positioning pin 7, so that the positioning pin 7 can move up and down in the blind hole. When the nut 9 is welded, the nut 9 is placed on the locating pin 7, so that the nut 9 is positioned, the upper electrode 5 descends to press the nut 9 to move downwards, and at the moment, the locating pin 7 also moves downwards together, so that the nut 9 contacts the plate 10 to realize welding; the descending displacement of nuts 9 with different specifications is different, and whether the problem of misplacement of the nuts 9 occurs is judged by detecting the displacement of the locating pin 7.

In the present embodiment, the positioning pin 7 is located at the center of the end face of one end of the lower electrode 6; the positioning plate 8 is disposed perpendicularly to the lower electrode 6.

In the present embodiment, the controller 2 is a PLC controller 2, and the lower electrode 6 is located directly below the upper electrode 5.

Working principle: as shown in fig. 3, a plate 10 is placed on the lower electrode 6, a through hole of a nut 9 to be welded on the plate 10 passes through the positioning pin 7, the nut 9 is placed on the positioning pin 7, the first driving mechanism 3 drives the upper electrode 5 to descend, the upper electrode 5 descends until contacting the nut 9, and the nut 9 is continuously pressed down, so that the nut 9 moves downwards until contacting the plate 10; at this time, the displacement of the upper electrode 5 lowered is H1; as shown in fig. 5, during the depression of the upper electrode 5, the positioning pin 7 moves downward together with the nut 9, and at this time, the displacement by which the positioning pin 7 moves downward is H2; the above process is the moving distance of the upper electrode 5 and the positioning pin 7 during normal welding; if the nut 9 is placed incorrectly, this will result in a different displacement. As shown in fig. 4, if the nuts 9 are misplaced and two are overlapped during the welding, the upper electrode 5 is lowered by H3; it is obvious that the value of H3 is smaller than H1, and if the set displacement value of the upper electrode 5 is h1±0.3 before the welding is started, the controller 2 will determine that the nut 9 is misplaced at this time to alert the user.

The embodiment provides a projection welding device with nut error proofing detection, through the detection to upper electrode 5, lower electrode 6 displacement, judge whether misplaced nut 9, easy operation can effectively prevent the problem of misplaced nut 9 in the welding process, has improved production quality, has also improved efficiency

Example 2

Other structures of the embodiment are the same as those of the embodiment 1, except that, as shown in fig. 2, the positioning mechanism further comprises a positioning plate 8 for placing the plate 10 to be welded in a side-turned state; the positioning plate 8 is transversely mounted at the end of the lower electrode 6. Because the end area of the lower electrode 6 is smaller, the plate 10 is easy to shake and roll over when the plate 10 is placed, and the supporting surface of the lower electrode 6 is enlarged by arranging the positioning plate 8, so that the plate 10 is positioned.

Wherein, be equipped with the mounting hole on the locating plate 8, locating plate 8 passes through the mounting hole cover and establishes on lower electrode 6, and the up end of locating plate 8 and the terminal surface parallel and level of lower electrode 6.

As shown in fig. 2, a boss may be further provided on the positioning plate 8 in combination with the structure of the plate 10, so as to facilitate placement and rapid positioning of the plate 10.

Example 3

Other structures of the embodiment are the same as those of the embodiment 1, except that the embodiment further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the controller 2. After the stroke detection device senses the controller 2 with the detected displacement value, the controller 2 judges the value, if the value is different from the value set by implementation, an alarm is triggered, and the audible and visual alarm gives out sound and light to alarm to remind a user.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The projection welding device with the nut error prevention detection is characterized by comprising a machine body (1), a controller (2), a first driving mechanism (3), a second driving mechanism (4), an upper electrode (5), a lower electrode (6) and a stroke detection device; the first driving mechanism (3) is arranged on the machine body (1), and the upper electrode (5) is connected with the driving end of the first driving mechanism (3) to drive the upper electrode (5) to move up and down; the second driving mechanism (4) is arranged on the machine body (1), and the lower electrode (6) is connected with the driving end of the second driving mechanism (4) to drive the lower electrode (6) to move up and down; a stroke detection device is arranged on each of the upper electrode (5) and the lower electrode (6); the first driving mechanism (3), the second driving mechanism (4) and the stroke detection device are all in communication connection with the controller (2).

2. The projection welding apparatus with nut error proofing detection of claim 1, wherein said travel detection means comprises a first photoelectric displacement sensor and a second photoelectric displacement sensor; the first photoelectric displacement sensor is arranged on the upper electrode (5), and the second photoelectric displacement sensor is arranged on the lower electrode (6); the first photoelectric displacement sensor and the second photoelectric displacement sensor are both in communication connection with the controller (2).

3. Projection welding device with nut error proofing detection according to claim 1, characterized in that the first driving mechanism (3) is a first cylinder fixed on the frame, one end of the upper electrode (5) is connected with the driving end of the first cylinder; the second driving mechanism (4) is a second air cylinder, the second air cylinder is fixed on the frame, and one end of the lower electrode (6) is connected with the driving end of the second air cylinder; the upper electrode (5) and the lower electrode (6) are vertically arranged, and the other end of the upper electrode (5) is opposite to the other end of the lower electrode (6).

4. A projection welding apparatus with error proofing detection of nuts according to claim 3, characterized in that a positioning mechanism is provided at one end of the lower electrode (6), said positioning mechanism being located at the end where the upper electrode (5) is located.

5. Projection welding device with error proofing detection of nuts according to claim 4, characterized in that the positioning mechanism comprises a positioning pin (7), said positioning pin (7) being vertically mounted at the end of the lower electrode (6); the travel detection device further comprises a third photoelectric displacement sensor, the third photoelectric displacement sensor is mounted on the locating pin (7), and the third photoelectric displacement sensor is electrically connected with the controller (2).

6. Projection welding apparatus with error proofing detection of nuts according to claim 5, characterized in that said positioning means further comprise a positioning plate (8) for placing the sheet (10) to be welded on its side; the positioning plate (8) is transversely arranged at the end part of the lower electrode (6).

7. The projection welding device with the nut error proofing detection according to claim 6, wherein a mounting hole is formed in the positioning plate (8), the positioning plate (8) is sleeved on the lower electrode (6) through the mounting hole, and the upper end face of the positioning plate (8) is flush with the end face of the lower electrode (6).

8. Projection welding device with error proofing detection of nuts according to claim 6, characterized in that the locating pin (7) is located in the centre of the end face of one end of the lower electrode (6); the positioning plate (8) is arranged perpendicular to the lower electrode (6).

9. Projection welding device with nut error proofing according to any of claims 1 to 8, characterized in that the controller (2) is a PLC controller (2), the lower electrode (6) being located directly below the upper electrode (5).

10. Projection welding apparatus with error detection of nuts as claimed in claim 9, characterized in that it further comprises an audible and visual alarm electrically connected to the controller (2).