An error-proof optical fiber positioning pin for automatic welding

Abstract

The present application relates to the field of positioning pins, and in particular to an anti-error optical fiber positioning pin for automatic welding. The utility model is an anti-error optical fiber positioning pin for automatic welding. The positioning pin comprises a mounting portion, a limiting portion and an introduction portion, the two ends of the limiting portion are respectively connected to the mounting portion and the introduction portion, the mounting portion is provided with a thread, the introduction portion is provided with a through hole, and the introduction portion is provided with a calibration section. The anti-error optical fiber positioning pin for automatic welding of the present application adopts the form of internal drilling and embedding optical fiber signals, so as to achieve the effect of both positioning the workpiece and directly preventing errors, which greatly reduces the quality risks caused by frequent adjustments due to the failure of indirect error prevention.

Description

Technical Field

[0001] The present application relates to the field of positioning pins, and in particular to an error-proof optical fiber positioning pin for automatic welding. Background Art

[0002] With the rapid development of the automobile manufacturing industry, the shape of automobile parts has become increasingly complex and lightweight. Most of the parts are special-shaped parts, and most of the parts need to be welded with multiple nuts. While ensuring that there is no leakage of the nuts, the quality and stability of mass production of parts must also be met. At this time, the error prevention of different nuts in welding is also particularly critical in production, and the error prevention design of different nuts is particularly important. A fiber optic positioning pin that is convenient and directly detects nuts just meets this purpose.

[0003] The existing nut error prevention is composed of a spring pin, a proximity switch and a nut locating pin. During work, the employee places the parts on the ground tooling locating pin. The nut height is 7.8MM, and the effective positioning height of the locating pin must not be higher than the nut. The spring pin is pressed down to the nut, and the height difference between the spring pin and the locating pin is used to achieve the purpose of preventing the nut from leaking. The disadvantage of the existing error prevention device is indirect error prevention. The effective positioning height of the nut positioning is not enough, and there is a phenomenon of part misalignment. The spring pin presses on the workpiece, and the error prevention sensor works normally, which cannot effectively play an error prevention effect, and there are quality risks. In this case, a new type of optical fiber locating pin that integrates error prevention and workpiece positioning was invented.

[0004] The new integrated optical fiber positioning pin integrates direct error prevention and positioning, realizing the real sense of preventing nut leakage and wrong installation. The optical fiber positioning pin adopts the form of punching holes inside the steel positioning pin to embed the optical fiber signal, so that the workpiece can be positioned and directly error-proofed, greatly reducing the quality risks caused by frequent adjustments due to indirect error prevention failure. In addition, the device has a simple structure and is easy to operate, which can effectively improve production efficiency and product quality. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an error-proof optical fiber positioning pin for automatic welding.

[0006] In order to achieve the above-mentioned purpose, the utility model has the following structure:

[0007] The present application includes an anti-error optical fiber positioning pin for automatic welding, characterized in that the positioning pin includes a mounting portion, a limiting portion and an introduction portion, the two ends of the limiting portion are respectively connected to the mounting portion and the introduction portion, the mounting portion is provided with a thread, the introduction portion is provided with a through hole, the limiting portion is provided with a calibration section, and the calibration section is perpendicular to the central axis of the through hole.

[0008] An external signal transmitter and a receiving device are respectively arranged on both sides of the through hole. The optical fiber signal transmitted by the signal transmitter passes through the through hole and is received by the receiving device.

[0009] The introduction part is a cylindrical structure, and the through hole is drilled in a direction perpendicular to the central axis of the cylinder. The through hole is formed to be an opening in a direction perpendicular to the central axis of the cylinder, and the plane perpendicular to the central axis of the through hole is the calibration plane.

[0010] A chamfer is provided at the intersection of the upper surface and the side surface of the introduction portion of the cylinder.

[0011] Preferably, the upper and lower surfaces of the limiting portion are two parallel planes, and the upper and lower surfaces of the limiting portion are in the same arch shape. The arched column structure is formed by stretching the arch shape in a direction perpendicular to the lower surface. The arch is a figure in which a complete circle is cut by a chord that does not pass through the center of the circle, and a larger arc portion is retained and closed with the chord.

[0012] The limiting part is the larger part of the limiting body after being cut by the cutting plane. The limiting body is a complete cylinder corresponding to the limiting part. The cutting plane is parallel to the calibration plane. The surface where the cutting plane cuts the intersection of the limiting body is the calibration section. The calibration section cooperates with the external fixture to fix the orientation of the through hole and ensure that the optical fiber signal passes through the through hole.

[0013] In the positioning pin, the limiting portion, the mounting portion and the introduction portion are connected with their center lines overlapping.

[0014] In the positioning pin, the through hole is a circular through hole.

[0015] In the positioning pin, the positioning pin is a steel positioning pin.

[0016] The utility model is used to provide an error-proof optical fiber positioning pin for automatic welding, the positioning pin includes a mounting portion, a limiting portion and an introduction portion, the two ends of the limiting portion are respectively connected to the mounting portion and the introduction portion, the mounting portion is provided with a thread, the introduction portion is provided with a through hole, the limiting portion is provided with a calibration section, and the calibration component ensures that the optical fiber signal passes through the through hole. An external signal transmitter and a receiving device are respectively provided on both sides of the through hole, the optical fiber signal emitted by the signal transmitter passes through the through hole, and the optical fiber signal is received by the receiving device. The error-proof optical fiber positioning pin for automatic welding of the present application can effectively solve the frequent failure adjustment due to indirect error-proofing, greatly reduce the quality accidents of leaky welding, and ensure the quality of the welding machine. In addition, the device has a simple structure and is easy to operate, and can effectively improve production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of the positioning pin of the present application;

[0018] Figure 2 A right side view of the positioning pin of the present application;

[0019] Figure 3 A top view of the positioning pin of the present application;

[0020] Explanation of symbols: 1 introduction part, 2 limiting part, 3 mounting part, 4 through hole, 5 thread, 6 calibration section. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present utility model.

[0022] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. "First" and "second" are not qualifiers, but are only for explanation to facilitate understanding of the technical solution of the utility model. The contents involved in "first" and "second" can be interchangeable. Generally speaking, the terms "including" and "comprising" only indicate that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0023] Unless otherwise specifically stated, the components, relative arrangements, functions, and numerical values ​​described in these embodiments do not limit the scope of the utility model. At the same time, it is obvious that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods, and equipment known to ordinary technicians in the relevant fields are not described in detail for the time being, but where appropriate, the techniques, methods, and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of step-by-step embodiments may have different sequences.

[0024] The present application includes an error-proof optical fiber positioning pin for automatic welding, such as Figure 1As shown, the positioning pin includes a mounting portion 3, a limiting portion 2 and an introduction portion 1, the two ends of the limiting portion 2 are respectively connected to the mounting portion 3 and the introduction portion 1, a thread 5 is provided on the mounting portion 3, a calibration section is provided on the limiting portion, and the calibration section is perpendicular to the central axis of the through hole, the introduction portion 1 is provided with a through hole 4, and an external signal transmitter and a receiving device are respectively provided on both sides of the through hole 4, the optical fiber signal emitted by the signal transmitter passes through the through hole 4, and the optical fiber signal is received by the receiving device.

[0025] Preferably, Figure 1 and Figure 2 As shown, the introduction part 1 of the locating pin is a cylindrical structure, and the through hole 4 is drilled in a direction perpendicular to the central axis of the cylinder. The through hole is formed by an opening in a direction perpendicular to the central axis of the cylinder, and the plane perpendicular to the central axis of the through hole is the calibration plane.

[0026] Preferably, Figure 1 As shown, a chamfer is provided at the boundary where the upper surface of the cylindrical introduction portion 1 of the positioning pin intersects with the side surface.

[0027] Preferably, Figure 1 and Figure 2 As shown, the upper and lower surfaces of the limiting portion 2 are two parallel planes, and the upper and lower surfaces of the limiting portion are in the same arch shape. The arched column structure is formed by stretching the arch shape in a direction perpendicular to the lower surface. The arch is a figure in which a complete circle is cut by a chord that does not pass through the center of the circle, and a larger arc portion is retained and closed with the chord.

[0028] Preferably, Figure 1 and Figure 2 As shown, the limiting part 2 is the larger part of the limiting body after being cut by the cutting plane, the limiting body is a complete cylinder corresponding to the limiting part 2, the cutting plane is parallel to the calibration plane, and the surface where the cutting plane cuts the intersection of the limiting body is the calibration section 6. The calibration section 6 cooperates with the external fixture to fix the orientation of the through hole to ensure that the optical fiber signal passes through the through hole 4.

[0029] Preferably, Figure 1-3 As shown, in the positioning pin, the center lines of the limiting portion 2, the mounting portion 3 and the introduction portion 1 coincide with each other.

[0030] Preferably, Figure 1 As shown, the through hole 4 of the positioning pin is a circular through hole.

[0031] Preferably, Figure 1As shown, the anti-mistake optical fiber locating pin is not only suitable for M6 nuts and M8 nuts, but also for nuts of other types.

[0032] Preferably, Figure 1-3 As shown, the locating pin in the locating pin is a steel locating pin.

[0033] like Figure 1-3 As shown, the mounting portion 3 of the automatic welding anti-error optical fiber locating pin of the present application is embedded in the through hole of the pre-welded plate. At this time, the planar mechanism on the external component welding fixture cooperates with the calibration section 6 on the locating pin to adjust the orientation of the through hole of the locating pin so that the through hole orientations of the through hole 4 of the locating pin are consistent and the central axis of the through hole points to the external mechanism signal transmitter.

[0034] like Figure 1-3 As shown, the signal transmitter located on one side of the through hole 4 transmits the optical fiber signal through the through hole 4, and the welding fixture located on the other side of the through hole 4 is provided with an optical fiber positioning sensor for detecting the position of the nut. The optical fiber positioning sensor can convert the projection and reflection time of light into distance, and realizes the function of preventing the nut from being missed and placed incorrectly by judging the distance.

[0035] Preventing wrong installation and missing installation means that the design of the optical fiber and the matching positioning pins enable the inner diameter and position of the nut to be controlled, avoiding wrong placement of the nut and missing welding. At the same time, the optical fiber positioning sensor is set to solve the quality risk of "missing installation".

[0036] Preferably, the optical fiber signal is equipped with a signal amplifier, and the nut error prevention function is realized by adjusting the reflection distance of the optical fiber to monitor the inner diameter of the nut.

[0037] Real-time monitoring means that the fiber optic positioning sensor detects the inner diameter of the nut placed on the fiber optic positioning pin in real time. Once the nut cannot be detected, the fiber optic ranging sensor feedback contact is powered off, the fixture cannot be clamped normally, and welding cannot be achieved, thereby avoiding the occurrence of leaking welds.

[0038] like Figure 1-3 As shown, the calibration section 6 set in the positioning pin of the structure can ensure that the optical fiber signal passes through the through hole 4. The optical fiber signal passing through the through hole 4 and the feedback information of the external mechanism are used to determine whether there is a situation of missing welding or wrong welding of the nut. Therefore, the error-proofing optical fiber positioning pin used for automatic welding in this application can effectively solve the frequent failure adjustment due to indirect error-proofing, greatly reduce the quality accidents of missing welding, and ensure the quality of the welding machine. In addition, the device has a simple structure and is easy to operate, which can effectively improve production efficiency and product quality.

[0039] The above is an explanation of the utility model and should not be considered as a limitation thereof. Although several exemplary embodiments of the utility model are described, it will be easily understood by those skilled in the art that many modifications can be made to the exemplary embodiments without departing from the technical features of the utility model. Therefore, all these modifications are intended to be included in the scope of the utility model as defined in the claims. It should be understood that the above is an explanation of the utility model and should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included in the scope of the attached claims. The utility model is defined by the claims and their equivalents.

Claims

1. An error-proof optical fiber positioning pin for automatic welding, characterized in that: The positioning pin comprises a mounting portion, a limiting portion and an introduction portion, the two ends of the limiting portion are respectively connected to the mounting portion and the introduction portion, the mounting portion is provided with a thread, and the introduction portion is provided with a through hole; The limiting portion is provided with a calibration section, which is perpendicular to the central axis of the through hole.

2. The error-proof optical fiber positioning pin for automatic welding according to claim 1, characterized in that: The limiting portion is an arcuate column structure, and the calibration section is a mid-plane portion of the side of the arcuate column.

3. The error-proof optical fiber positioning pin for automatic welding according to claim 2, characterized in that: The introduction part is a cylinder, and the through hole is an opening in a direction perpendicular to the central axis of the cylinder.

4. The error-proof optical fiber positioning pin for automatic welding according to claim 3, characterized in that: The center lines of the limiting portion, the mounting portion and the introduction portion coincide with each other.

5. The error-proof optical fiber positioning pin for automatic welding according to claim 4, characterized in that: The through hole is a circular through hole.

6. The error-proof optical fiber positioning pin for automatic welding according to claim 5, characterized in that: The positioning pin is a steel positioning pin.

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