JPH11267853A - Welding chip shape checking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a welding chip shape at high accuracy. SOLUTION: This welding chip shape checking device comprises a moving template 14 which has a penetration hole shape light passing part 16 installed in a direction crossing with a moving direction of welding chips 21, 22, a spring 17 which energizes the moving template 14 in a direction opposed to a pressing direction of the welding chips 21, 22, a light emission part 31 and a light receiving part 32 arranged opposingly each other on an extension line of the light passing part 16. In this case, both welding chips 21(, 22) are made to contact with each moving template 14, and pressed respectively. Then, each moving template 14 is moved along with the movement of each of the welding chips 21, 22, and the light emission of each light emitting part 31 is passed through each light passing part 16 arranged to each moving template 14 and is received at each light receiving part 32 by the movement of each moving template 14. The shapes of the welding chips 21, 22 are judged as normal from the light received at the light receiving part 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a welding tip shape confirmation device. More specifically, the present invention relates to a welding tip shape confirmation device that confirms whether or not the shape of a welding tip installed on a polished welding spot gun has a predetermined shape.

[0002]

2. Description of the Related Art Conventionally, as a welding tip shape confirmation device for confirming whether or not a polished welding tip has a predetermined shape, a welding tip shape confirmation device shown in FIG. Had been. That is, 101 is a fixed template. Each of the two fixed templates 101 is formed of a plate-like body, and a hemispherical concave portion 102 corresponding to the outer shape of the welding tips 106 and 107 is provided at the center. Through holes 103 are provided at the bottom and top of the concave portion of each fixed template 101. An insulating paper 104 is provided between the upper fixed template 101 and the lower fixed template 101 in the drawing. Holes are provided in the insulating paper 104 corresponding to the positions of the through holes 103. 105
Is a frame for fixing the upper fixed template 101 and the lower fixed template 101 from outside. 106 and 107 are upper and lower welding tips, respectively.

Therefore, the upper welding tip 106 and the lower welding tip 107 are polished. The polished ends of the welding tips 106 and the welding tips 107 are placed in the recesses 102 on both sides of the two fixed templates 101 so as to sandwich the two fixed templates 101 respectively. Then, the tips of the welding tips 106 of both poles were pressed to confirm the conduction between the conductors. When power was supplied, the shape of the tip was determined by determining that the tip was normal. Then, when the power is supplied, the conduction between the welding tips 106 and 107 is confirmed by determining that it is normal.

[0004]

[Problems to be solved by the invention]

However, in the conventional example shown in FIG. 3, foreign matters adhere to the tips of the welding tips 106 and 107,
Alternatively, if a projection is formed, the welding tip 10
There is a problem that continuity occurs between 6, 107 and an erroneous determination is made.

[0006]

[Means for Solving the Problems]

According to the present invention, the welding tip is contacted and pressed, and is moved with the movement of the welding tip in the moving direction of the welding tip at the time of pressing, and is formed with a through hole in a direction intersecting with the moving direction of the welding tip. A template made of an insulator provided with a light-transmitting portion, a biasing means for biasing the template in a direction opposite to a pressing direction of the welding tip, and an extension of the light-transmitting portion located at the time of pressing the welding tip. Provided is a welding tip shape confirmation device comprising a light emitting unit and a light receiving unit which are installed in such a manner. Therefore, the welding tip is brought into contact with the template and pressed. The template moves with the movement of the welding tip, but the light emitting part and the light receiving part are opposed to each other on the extension of the through hole of the light transmitting part located when the welding tip is pressed,
The light emitted from the light emitting unit is received by the light receiving unit through the light transmitting unit provided on the template by the movement of the template. The shape of the welding tip is determined to be normal by receiving light at the light receiving unit.

Further, according to the present invention, the welding tip is contacted and pressed, and is moved with the movement of the welding tip in the moving direction of the welding tip at the time of pressing, and the light is transmitted in a direction intersecting with the moving direction of the welding tip. One template made of an insulator provided with a portion, a biasing means for biasing the template in a direction opposite to the pressing direction of the welding tip, and installed on the opposite side of the one template across the biasing means,
It is made of an insulator that is pressed against the welding tip and is moved in the direction of movement of the welding tip at the time of pressing along with the movement of the welding tip, and is provided with a light transmitting part in a direction intersecting with the direction of movement of the welding tip. There is provided a welding tip shape confirmation device, comprising: the other template; and a light-emitting part and a light-receiving part which are installed to face each other on the extension of the light-transmitting part positioned when each welding tip is pressed. Therefore, both welding tips respectively contact and press each template. Each template moves with the movement of each welding tip, but each light emitting unit and each light receiving unit are installed facing each other on the extension of the light transmitting unit located at the time of pressing each welding tip. Due to the movement, the light emitted from each light emitting unit passes through each light transmitting unit provided in each template and is received by each light receiving unit. The shape of the welding tip is determined to be normal by receiving light at the light receiving unit.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to FIGS. 1 and 2 showing a central sectional view.

Reference numeral 11 denotes a main body of the welding tip shape confirmation device. Reference numerals 21 and 22 denote welding tips forming both poles of the welding spot gun. Reference numeral 12 denotes a fixed template. The fixed template 12 is formed of a plate. The fixed templates 12 are installed on both upper and lower surfaces of the main body 11. Each fixed template 12 is provided with a through hole 13 having a slightly tapered inner peripheral curved surface corresponding to the outer shape of the welding tip 21 and the welding tip 22 at the center.

Reference numeral 14 denotes a moving template. The moving template 14 is made of a disc-shaped insulator wider than the through-hole 13 provided in each fixed template 12, and has a concave shape corresponding to the tip shapes of the welding tips 21 and 22 on the center side at the center. A recess 15 is provided. 16 is
It is a light transmitting part having a through-hole shape. The light transmitting portions 16 are provided on the respective moving templates 14 in a direction perpendicular to the pressing direction of the welding tips 21 and 22 and in such a manner that the light transmitting portions 16 and the light transmitting portions 16 are parallel to each other.

Reference numeral 17 denotes a spring. Spring 1
7 is installed in a cylindrical space 18 provided at the center of the main body 11 and between the two moving templates 14, and connects each moving template 14 to a welding tip 21.
In the direction opposite to the pressing direction of the welding tip 22, it is urged outward, that is, so that the outer surface of each movable template 14 contacts the inner surface of each fixed template 12.

Reference numeral 31 denotes a light emitting unit, and 32 denotes a light receiving unit. The light emitting unit 31 and the light receiving unit 32 are installed on the main body 11, respectively. The light emitting unit 31 and the light receiving unit 32
When the welding tip 22 is brought into contact with and pressed by each of the moving templates 14, the light-transmitting portion at the position taken by the light-transmitting portion 16 when each of the moving templates 14 moves from the most central portion to the main body 11 at the time of pressing. They are installed facing each other on an extension of the sixteen. The light receiving unit 32 is connected to the arithmetic unit, and when receiving light, transmits the light to the arithmetic unit.

Therefore, both the welding tips 21 and the welding tips 22 are brought into contact with the respective moving templates 14 and pressed. Then, as shown in FIG. 2, the welding tip 21 and the welding tip 22 are regulated from the outer periphery of each welding tip 21 and the welding tip 22 by the through hole 13 provided in the fixed template 12. The tips of the welding tips 21 and the welding tips 22 that have passed through the through holes 13 of the fixed template 12 contact the concave portions of the concave portions 15 of the moving template 14 and push the moving templates 14. Then, each moving template 14 moves inside the main body 11 against the urging force of the spring 17.

The light-emitting portions 31 and the light-receiving portions 32 are disposed so as to be opposed to each other on the extension of the light-transmitting portion 16 at a position to be taken when each template 14 is moved to the center of the main body 11. The light emitted from each light emitting section 31 is received by each light receiving section 32 through each light transmitting section 16 provided in each template 14 by the movement of each moving template 14. The light receiving unit 32 is connected to the arithmetic unit, and when receiving light, transmits the light to the arithmetic unit. The shape of the welding tips 21 and 22 is determined to be normal by receiving light at the light receiving unit 32, and a signal to that effect is transmitted. If the light receiving unit 32 does not detect light reception within a certain period of time even when the welding tips 21 and 22 are pressed, the arithmetic unit determines that there is an abnormality and transmits a signal to that effect.
In the light receiving section 32, if the light transmitting section 16 is slightly displaced due to foreign matter adhering to the tips of the welding tips 21 and 22, the light receiving section 32 cannot receive light and cannot be judged to be normal.

[0017]

Therefore, according to the present invention, it is possible to accurately detect the shape of the welding tip.

[Brief description of the drawings]

FIG. 1 is a central sectional view of an embodiment of the present invention.

FIG. 2 is a central sectional view of the embodiment of the present invention.

FIG. 3 is a central sectional view of a conventional example.

[Explanation of symbols]

 12 Fixed template 14 Moving template 16 Light transmitting part 17 Spring 21 Welding tip 22 Welding tip

Claims (2)

[Claims] 1. A welding tip, which is pressed and brought into contact with the welding tip, is moved with the movement of the welding tip in the moving direction of the welding tip at the time of pressing, and is formed in a through-hole shape in a direction intersecting with the moving direction of the welding tip. A template made of an insulator provided with a light portion; a biasing means for biasing the template in a direction opposite to a pressing direction of the welding tip; and a biasing means for facing the extension of the light transmitting portion positioned when the welding tip is pressed. An apparatus for confirming a shape of a welding tip, comprising a light emitting part and a light receiving part to be installed. 2. A light transmitting portion is provided in a direction in which the welding tip is moved in the direction of movement of the welding tip at the time of pressing by being brought into contact with the welding tip and is moved with the movement of the welding tip. One template made of an insulator, a biasing means for biasing the template in a direction opposite to the pressing direction of the welding tip, and a biasing means disposed on the other side of the one template with the biasing means interposed therebetween. The other template made of an insulator, which is contacted and pressed, and is moved in accordance with the movement of the welding tip in the moving direction of the welding tip at the time of pressing, and is provided with a light transmitting portion in a direction intersecting with the moving direction of the welding tip. And a light-emitting part and a light-receiving part which are installed facing each other on the extension of the light-transmitting part located when each welding tip is pressed. apparatus.