CN211889410U

CN211889410U - Projection welding mistake proofing device

Info

Publication number: CN211889410U
Application number: CN202020493871.2U
Authority: CN
Inventors: 陈攀
Original assignee: Cosma Starq Automotive System Chongqing Co ltd
Current assignee: Cosma Starq Automotive System Chongqing Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-11-10
Anticipated expiration: 2030-04-07

Abstract

The utility model relates to an auxiliary welding technical field, concretely relates to projection welding mistake proofing device, including bottom electrode, locating pin and sensor, be equipped with the through-hole in the bottom electrode, the locating pin is located in the through-hole, the sensor is located the bottom of locating pin, the sensor is used for detecting the displacement of locating pin. This application is through reforming transform bottom electrode, when welding the nut, at first place the sheet metal component on bottom electrode, then place the nut, go up the electrode and push down the nut, the locating pin downstream, if the nut is put anti-or the model is wrong, the distance that the locating pin descends is different with the distance that the locating pin descends when placing correct nut, the sensor detects the distance that the locating pin moved down, whether the signal judgement nut that the staff passes through the sensor is put anti-or put the mistake, thereby prevent to weld the wrong condition, and the cost is reduced.

Description

Projection welding mistake proofing device

Technical Field

The utility model relates to an auxiliary welding technical field, concretely relates to projection welding mistake proofing device.

Background

Many parts need to be installed on the automobile body, the connection mode is mostly nut and nut connection, and the nut connection adopts projection welding nut mode again mostly to connect.

The mode of projection welding nut is to place the panel beating on the bottom electrode, then places the nut in the welding hole department of panel beating, goes up the electrode and pushes down the panel beating then welds, and the workman is probably used the nut model wrong when the welding, for example should use short nut with long nut to cause the reprocessing of part to scrap even, will lead to the increase of cost like this.

Disclosure of Invention

The utility model discloses thereby to carrying out projection welding occasionally at present probably weld the wrong problem that leads to reprocessing or even scrap and lead to the cost increase of nut model, provide a projection welding mistake proofing device.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides a projection welding mistake proofing device, includes bottom electrode, locating pin and sensor, be equipped with the through-hole in the bottom electrode, the locating pin is located in the through-hole, the sensor is located the bottom of locating pin, the sensor is used for detecting the displacement of locating pin.

Preferably, the upper part of the lower electrode is provided with an electrode cover, the electrode cover is provided with a boss, and the outer wall of the positioning pin is provided with a limiting bulge; the locating pin overcoat is equipped with the spring, the spring is located spacing arch with between the boss. The spring is fixed through the boss limiting protrusion, when the upper motor presses the nut downwards, the positioning pin moves downwards, the spring is compressed, the upper motor leaves after the nut is welded, and the elastic force of the spring drives the positioning pin to achieve automatic reset.

Preferably, the top of the positioning pin is conical. The top of locating pin is coniform, and the diameter of lower part is the same with the diameter of nut, and just in the nut can penetrate the locating pin like this, the nut just driven locating pin downstream when being gone up the motor and pushing down. The conical positioning pin plays both a positioning role and a guiding role.

Preferably, an L-shaped bracket is mounted at the bottom of the lower electrode, and the sensor is mounted at one end of the bracket far away from the sensor. Through the support mounting sensor, a plurality of columns of mounting holes are arranged in the height direction of the support, so that the position of the sensor can be adjusted according to nuts of different models.

Preferably, the lower electrode is sleeved with an electrode arm. The electrode rod can be more stable by mounting the electrode rod through the electrode arm.

Preferably, the sensor is a displacement sensor, the sensor is electrically connected with a PLC (programmable logic controller), and the PLC is electrically connected with a display screen; the PLC controller is used for converting the distance data between the bottom of the positioning pin returned by the sensor and the sensor into digital signals, and the display screen is used for displaying the digital data converted by the PLC controller. Detect the distance that the locating pin descends through displacement sensor, the PLC controller compares the displacement that the locating pin sensor descends with preset's displacement, then shows through the display screen, and whether the model of the nut of placing is correct, and the staff can audio-visually see, and is more convenient.

Preferably, the projection welding mistake proofing device further comprises an alarm, the alarm is electrically connected with the PLC, and the alarm is used for giving an alarm when the distance between the bottom of the positioning pin and the sensor exceeds a set range. When the descending distance of the nut exceeds the descending distance of the standard nut, the alarm gives an alarm to remind a worker to replace the nut, and welding errors are avoided.

Preferably, the alarm is an audible alarm. The workman judges through sound, can compromise other things simultaneously for it is higher to handle affairs efficiency.

Preferably, the alarm is a photoelectric alarm. If the noise of the factory is large, workers can be reminded in a visual mode in order not to influence the judgment.

Compared with the prior art, the invention has the beneficial effects that: the application provides a projection welding mistake proofing device, when welding the nut, at first place the sheet metal component on lower electrode, then place the nut, go up the electrode and push down the nut, the locating pin downstream, if the nut number mistake, the distance that the locating pin descends is different with the distance that the correct nut descends, the sensor detects the distance that the locating pin moved down, whether the signal judgement nut model of staff through the sensor is wrong, prevent to weld the mistake, the condemned condition even of doing over again needn't appear, thereby reduce the cost.

Description of the drawings:

fig. 1 is a schematic structural diagram of a projection welding error-proofing device according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a second embodiment of the projection welding mistake-proofing device provided by the present application.

The labels in the figure are: 1-lower electrode, 2-positioning pin, 3-sensor, 4-electrode cover, 5-boss, 6-limit protrusion, 7-spring, 8-bracket, 9-electrode arm.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in FIG. 1, the application provides a projection welding mistake proofing device, which comprises a lower electrode 1, a positioning pin 2, a sensor 3, an electrode cover 4, an electrode arm 9, a PLC (programmable logic controller), a display screen and an alarm. Be equipped with the through-hole in the bottom electrode 1, the both ends of through-hole are passed respectively at the both ends of locating pin 2, and the support 8 of L type is installed to the bottom of bottom electrode 1, and sensor 3 installs on support 8, and sensor 3 is used for detecting the distance that locating pin 2 removed. Electrode cover 4 is installed on the upper portion of bottom electrode 1, and electrode cover 4 is equipped with boss 5 with 1 junction of bottom electrode, and the outer wall on 2 upper portions of locating pin is equipped with spacing arch 6, and 2 overcoat of locating pin are equipped with spring 7, and spring 7 is located between spacing arch 6 and the boss 5, through spacing arch 6 and the position of boss 5 control spring 7.

In order to position the nut and limit the nut from falling into the positioning pin 2, the upper part of the positioning pin 2 is conical, so that the guiding function and the positioning function are achieved. The electrode arm 9 is sleeved outside the lower electrode 1, and the lower electrode 1 is installed on the welding device through the electrode arm 9.

The sensor 3 can be a displacement sensor or a photoelectric sensor, if the sensor 3 adopts a displacement sensor, the sensor 3 is arranged at the bottom of the positioning pin 2 through the bracket 8, and the position of the sensor 3 is opposite to the positioning pin 2, so that the measured data is more accurate. Sensor 3 is connected with the PLC controller, and the data conversion that the PLC controller passed back the displacement sensor become digital signal to data display after will converting is on the display screen, has had the exact distance information of prestoring in the PLC controller, when welding exact nut promptly, 2 bottoms of locating pin are apart from displacement sensor 3's distance. If the measured distance between the positioning pin 2 and the displacement sensor 3 is larger than or smaller than a correct numerical value, the PLC sends information to an alarm, and the alarm reminds workers of nut error. The method for converting the signal into the digital signal and comparing the converted digital signal with the pre-stored signal by the PLC controller is the prior art and is not repeated in the application.

As shown in fig. 2, if the sensor 3 is a photoelectric sensor, the photoelectric sensor is mounted on the side surface of the positioning pin 2, when a correct nut is welded, the upper electrode presses the nut downwards, the positioning pin 2 moves downwards, and the photoelectric sensor 3 is mounted on the side surface of the bottom of the positioning pin 2 at the moment; after the positioning pin 2 moves downwards, if the photoelectric sensor 3 detects a signal, the alarm does not give an alarm, if the photoelectric sensor 3 does not detect the signal, the situation that the descending distance of the positioning pin 2 is smaller than the descending distance which does not reach the standard, or the descending distance of the positioning pin 2 is larger than the descending distance which exceeds the standard is indicated, and if the photoelectric sensor 3 does not detect the signal in the specified time, the situation that the type of the nut is wrong is indicated.

The alarm can adopt an audible alarm to remind workers in an auditory mode, and certainly can adopt a photoelectric alarm to judge in order to prevent the excessive influence of the welding environment noise and remind the workers in a visual mode.

The working process is as follows: place the sheet metal component on electrode cover 4, the locating pin 2 is aimed at to the welding hole on the sheet metal component, then put the nut on locating pin 2, go up the electrode and push down the nut, the nut drives locating pin 2 downstream, spring 7 is compressed, sensor 3 detected signal, if the distance of locating pin 2 downstream is greater than or is less than the distance of standard then the staff is reminded in the alarm warning, if not report to the police just indicate that the model or the direction of nut is correct, then can weld. And after welding, the metal plate is taken away, and the positioning pin 2 is lifted upwards under the action of the spring 7 and rebounds to a natural state. Through the projection welding mistake proofing device that this application provided can just find the problem before the welding, just find the problem after the welding can not appear, cause and need reprocess and scrap even to the cost is reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a projection welding mistake proofing device, its characterized in that includes bottom electrode (1), locating pin (2) and sensor (3), be equipped with the through-hole in bottom electrode (1), locating pin (2) are located in the through-hole, sensor (3) are located the bottom of locating pin (2), sensor (3) are used for detecting the displacement of locating pin (2).

2. The projection welding mistake proofing device according to claim 1, wherein an electrode cover (4) is installed on the upper portion of the lower electrode (1), a boss (5) is arranged on the electrode cover (4), and a limiting protrusion (6) is arranged on the outer wall of the positioning pin (2); the locating pin (2) overcoat is equipped with spring (7), spring (7) are located spacing arch (6) with between boss (5).

3. A projection welding mistake proofing device according to claim 1, characterized in that the top of the positioning pin (2) is conical.

4. A projection welding mistake proofing device according to claim 1, characterized in that an L-shaped bracket (8) is mounted at the bottom of the lower electrode (1), and the sensor (3) is mounted at one end of the bracket (8) far away from the sensor (3).

5. A projection welding mistake proofing device according to claim 1, characterized in that the lower electrode (1) is externally sheathed with an electrode arm (9).

6. The projection welding mistake proofing device of claim 1, wherein the sensor (3) is a displacement sensor (3), the sensor (3) is electrically connected with a PLC controller, and the PLC controller is electrically connected with a display screen; the PLC controller is used for converting the distance data between the bottom of the positioning pin (2) returned by the sensor (3) and the sensor (3) into digital signals, and the display screen is used for displaying the digital data converted by the PLC controller.

7. A projection welding mistake proofing device according to claim 6, characterized in that it further comprises an alarm electrically connected to the PLC controller for alarming when the distance between the bottom of the positioning pin (2) and the sensor (3) is smaller than a standard distance.

8. A projection welding mistake proofing device according to claim 7, wherein the alarm is an audible alarm.

9. A projection welding mistake proofing device according to claim 7, wherein the alarm is a photoelectric alarm.