CN111702457A

CN111702457A - Bush mistake proofing device and pressure equipment machine

Info

Publication number: CN111702457A
Application number: CN202010473032.9A
Authority: CN
Inventors: 秦承华; 雷涛; 贺东方; 杨黄锐; 刘鹏; 黄蜜; 刘祥; 罗帆
Original assignee: Dongfeng Wuhan Industrial Co ltd
Current assignee: Dongfeng Wuhan Industrial Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-09-25

Abstract

The invention provides a bushing error-proofing device which comprises a base and a step pin fixedly arranged on the base, wherein the diameter of the top of the step pin is smaller than that of the bottom of the step pin; a sensor is fixedly arranged on one side of the base, which is positioned on the step pin, and the sensor is close to the step pin; one side of the base is fixedly connected with an installation plate, and a photoelectric switch is fixedly installed on the installation plate just opposite to the step pin. The bush mistake proofing device solves the problems that when the existing press fitting machine presses the bush onto an automobile accessory, the bush model is easy to use wrongly, and the press fitting is not in place.

Description

Bush mistake proofing device and pressure equipment machine

Technical Field

The invention relates to the field of automobile part machining, in particular to a bushing error-proofing device and a press-fitting machine.

Background

In the manufacturing process of automobile parts, the production beat is fast, the yield is high, and the control of the process quality in the production process plays an important role in production. In the production operation process, the first-line production staff is hard to keep the consistency of the heights, so that the defects of batch products such as wrong bushing models, improper press fitting and the like are caused by misoperation. Some parts containing the bushings exist in the automobile parts, and due to the fact that the difference of the bushings is very small, good mistake proofing function is difficult to design on the bushing press-fitting clamp.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bushing error-proofing device to solve the problems that the type of a bushing is easy to use in a wrong way and the bushing is not pressed in place in the conventional bushing pressing process.

In order to achieve the technical purpose, one aspect of the technical scheme of the invention provides a bushing press-fitting clamp which comprises a base and a step pin fixedly arranged on the base; the step pin comprises a first diameter shaft and a second diameter shaft, and the diameter of the first diameter shaft is smaller than that of the second diameter shaft; a sensor is fixedly arranged on one side, located on the step pin, of the base, is close to the step pin and is used for detecting whether a bushing is sleeved on the second diametric shaft or not; one side of base is a mounting panel of fixedly connected with still, fixed mounting has a photoelectric switch on the mounting panel, photoelectric switch is used for detecting whether the cover is equipped with the bush on first diameter axle or the second diameter axle.

Furthermore, a groove is formed in the position, close to the step pin, of the base, and the sensor is fixedly installed in the groove.

Furthermore, a plurality of step pins are arranged on the base at equal intervals along the length direction, one side of each step pin is fixedly provided with one sensor, and each step pin also corresponds to one photoelectric switch.

Further, the top of the step pin is provided in a conical shape.

Further, the sensor is an inductive proximity switch with model number of IFW 204; the model of the photoelectric switch is E3Z-LS.

Further, the bush includes a first bush and a second bush, the inner diameter of the first bush is 12mm, the inner diameter of the second bush is 13.5mm, and the detection distance of the sensor is 1.5 mm.

The invention also provides a press-mounting machine which comprises a bottom plate, a press head fixedly arranged on the bottom plate, a press-mounting clamp and the bushing error-proofing device, wherein the press head is fixedly arranged on the bottom plate; the pressing head is used for pressing the bushing on a workpiece, and the pressing clamp is used for clamping the workpiece.

Further, the workpiece is a cross arm welding assembly.

Compared with the prior art, the invention has the beneficial effects that: the bushing error-proofing device provided by the invention comprises a step pin, and a proximity sensor and a photoelectric switch which are positioned on one side of the step pin, wherein when the bushing is sleeved at the bottom of the step pin, the proximity sensor and the photoelectric switch simultaneously detect signals, and the sleeved bushing is judged to be the bushing with a larger inner diameter; when the bush cover was established at the top of step round pin, proximity sensor did not detect the signal, and photoelectric switch detected the signal that the bush cover was established, then judged the bush of establishing for the less complete set of internal diameter, detected signal compares with the bush input signal of actual needs, judges whether the bush signal is wrong, avoids the bush model to use by mistake, has improved the reliability of bush pressure equipment.

Drawings

FIG. 1 is a schematic structural diagram of a press-fitting machine provided by the invention;

FIG. 2 is a schematic structural view of the cross arm welding assembly of FIG. 1;

FIG. 3 is a schematic view of the bushing error proofing apparatus of FIG. 1;

fig. 4 is a press-fitting flow chart of the press-fitting machine provided by the invention;

description of reference numerals:

the device comprises a 1-pressure head, a 2-press fitting clamp, a 3-cross arm welding assembly, a 4-error-proofing device, a 5-bottom plate, a 31-first bushing, a 32-second bushing, a 41-base, a 42-step pin, a 421-first diameter shaft, a 422-second diameter shaft, a 43-sensor, a 44-photoelectric switch and a 45-mounting plate.

Detailed Description

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

As shown in fig. 1, the present embodiment provides a press-fitting machine including a base plate 5, a press head 1 fixedly mounted on the base plate 5, a press-fitting jig 2, and a bush error proofing device 4. The press fitting clamp 2 is used for clamping a workpiece 3, the pressure head 1 is used for pressing a bush on the workpiece 3, and the bush mistake proofing device 4 is used for preventing the press fitting machine from mistakenly using the type of the bush.

The workpiece 3 in this embodiment is a crossbar welding assembly, but is not limited to press fitting of a bush of the crossbar welding assembly 3. As shown in fig. 2, when assembling the automobile, the crossbar welding assembly 3 needs to press-fit a first bushing 31 having an inner diameter of 12mm to one end of the crossbar welding assembly 3 and a second bushing 32 having an inner diameter of 13.5mm to the other end of the crossbar welding assembly at the same time, and the difference between the inner diameters of the first bushing 31 and the second bushing 32 is 1.5 mm.

As shown in fig. 3, the bushing error-proofing device 4 includes a base 41 and a step pin 42 fixedly mounted on the base 41, where the step pin 42 includes a first diameter shaft 421 located at the top and a second diameter shaft 422 connected to the bottom of the first diameter shaft 421, the diameter of the first diameter shaft 421 is smaller than the first diameter shaft, specifically, the diameter of the first diameter shaft is d, and d is less than or equal to 12 mm; the diameter of the second diametric shaft is D, and D is more than 12mm and less than or equal to 13.5 mm.

In order to facilitate the sleeving of the first bushing 31 and the second bushing 32 on the step pin 42, the top of the step pin 42 is conical, and when the bushings are sleeved on the step pin 42, the function of guiding can be achieved.

A groove 46 is formed at one side of the step pin 42, and a sensor 43 is fixedly installed in the groove 46. The sensor 43 is used for detecting a signal that the second bushing 32 is sleeved on the second diametric shaft 422 of the stepped pin 42. The sensor 43 is preferably an inductive proximity switch, preferably of the type IFW204, with a detection distance of 1.5 mm. Of course, the sensor may also employ a photoelectric switch, but for cost savings, an inductive proximity switch is preferred. The inductive proximity switch 43 is fixedly mounted on the base 41, a groove 46 is formed in a position close to the step pin 42, the inductive proximity switch 43 is fixedly mounted in the groove, and when the second bushing 32 is sleeved on the second diameter shaft 422, the sensing surface of the inductive proximity switch is opposite to the side wall of the second bushing 32. When the bushing is within 1.5mm of the detection distance of the inductive proximity switch 43, an induction signal can be generated and sent to the PLC controller.

One side of the base 41 is also fixedly connected with a mounting plate 45, a photoelectric switch 44 is fixedly mounted on the mounting plate 45, the photoelectric switch 44 is used for detecting whether a signal is provided by a bushing on the step pin 42, the photoelectric switch 44 emits light beams at a certain distance when detecting, different photoelectric switches correspond to different light beam emission distances, and the light beams generate corresponding signals once being blocked. The opto-electronic switch 44, preferably of the type E3Z-LS, can detect signals at a distance by means of a light beam, in contrast to the use of a conventional sensor. The photoelectric switch 44 of the present invention is installed in such a manner that the light beam emitted from the photoelectric switch just avoids the step pin 42 and irradiates the sidewall portions of the first and

second bushings

31 and 32, i.e., the step portions of the step pin 42 are located at the same horizontal position, and the emitted light beam is just blocked by the sidewall portions of the first and

second bushings

31 and 32 fitted over the step pin, thereby generating the sensing signal.

In order to improve the press-fitting efficiency and simultaneously perform error-proofing detection on a plurality of bushings, a plurality of step pins 42 are arranged on the base 41 at equal intervals along the length direction, one side of each step pin 42 is fixedly provided with a sensor 43, and each step pin 42 corresponds to one photoelectric switch 44.

The error-proofing principle of the bushing error-proofing device 4 is as follows: when the first bushing 31 with the inner diameter of 12mm needs to be press-fitted at one end of the cross arm welding assembly 3 or the second bushing 32 with the inner diameter of 13.5mm needs to be press-fitted at the other end of the cross arm welding assembly, a bushing sleeve is picked up from a corresponding material frame and sleeved on the step pin 42, if the bushing sleeve is sleeved on the first diameter shaft 421 at the top of the step pin 42, the photoelectric switch 44 detects a signal that the bushing sleeve is sleeved on the step pin 42, but the sensor 43 does not detect a signal that the bushing sleeve is sleeved on the second diameter shaft 422 at the bottom of the step pin 42, the inner diameter of the picked-up bushing is judged to be 12 mm; if the bushing is sleeved on the second diameter shaft 422 of the step pin 42, which is located at the bottom, the photoelectric switch 44 detects that the bushing is sleeved on the step pin 42, and meanwhile, the sensor 43 detects that the bushing is sleeved on the second diameter shaft 422 of the step pin, the inner diameter of the picked bushing is judged to be 13.5 mm; and comparing the detection signal with the size of the bushing to be placed on the corresponding material frame, namely the input correct bushing signal, and judging whether the type of the bushing is wrong or not.

Furthermore, the press-fitting machine further comprises an alarm device and a controller, wherein the alarm device, the pressure head 1, the press-fitting clamp 2 and the error-proofing device 4 are electrically connected with the controller. The alarm device is a warning lamp. As shown in fig. 4, the press-fitting method of the press-fitting machine includes the steps of:

s1, inputting a signal for selecting the first bushing 31 or the second bushing 32 to press fit through an operation screen of the press fitting machine;

s2, placing the cross arm welding assembly 3 needing bushing press fitting on a press fitting machine, and clamping through the press fitting clamp 2;

s3, picking up the bushing from the corresponding material frame and sleeving the bushing on the step pin 42 of the error-proofing device 4; if the warning lamp gives an alarm, the lining 31 is placed in another material frame; if no alarm is given, go to S4;

s4, controlling the pressure head to press the first bushing into the workpiece;

and S5, opening the press-fitting clamp 2 and taking out the pressed workpiece.

The error-proofing device provided by the invention can effectively avoid the problem of improper press fitting caused by wrong use of the type of the bushing through the arrangement of the step pin 42, and improves the quality of vehicle assembly.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A bushing error-proofing device is characterized by comprising a base and a step pin fixedly installed on the base; the step pin comprises a first diameter shaft and a second diameter shaft, and the diameter of the first diameter shaft is smaller than that of the second diameter shaft; a sensor is fixedly arranged on one side, located on the step pin, of the base, is close to the step pin and is used for detecting whether a bushing is sleeved on the second diametric shaft or not; one side of base is a mounting panel of fixedly connected with still, fixed mounting has a photoelectric switch on the mounting panel, photoelectric switch is used for detecting whether the cover is equipped with the bush on first diameter axle or the second diameter axle.

2. The bushing error proofing apparatus of claim 1, wherein a groove is formed on the base at a position close to the step pin, and the sensor is fixedly installed in the groove.

3. The bushing error-proofing device according to claim 1 or 2, wherein a plurality of step pins are arranged on the base at equal intervals along the length direction, one side of each step pin is fixedly provided with one sensor, and each step pin corresponds to one photoelectric switch.

4. The bushing error proofing apparatus of claim 1, wherein the top of the step pin is provided in a conical shape.

5. The bushing error proofing apparatus of claim 1, wherein said sensor is an inductive proximity switch, model IFW 204; the model of the photoelectric switch is E3Z-LS.

6. The bushing error proofing apparatus of claim 1, wherein the bushing comprises a first bushing and a second bushing, the first bushing has an inner diameter of 12mm, the second bushing has an inner diameter of 13.5mm, and the sensor has a sensing distance of 1.5 mm.

7. A press-fitting machine comprising a base plate, a press-fitting head fixedly mounted on the base plate, a press-fitting jig, a bush error proofing device according to any one of claims 1 to 6; the pressing head is used for pressing the bushing on a workpiece, and the pressing clamp is used for clamping the workpiece.

8. The press-fit machine of claim 7, wherein the workpiece is a crossbar welding assembly.