KR101958575B1 - Welding tip inspection equipment - Google Patents

Abstract

The present invention relates to an apparatus for inspecting a welding tip used in a spot welder, and more particularly to an apparatus for inspecting a welding tip used in a spot welder, And a light source is irradiated to the welding tip, and the reflected light source is measured to inspect the surface state of the welding tip, and at least one detecting portion inserted into the sensor inserting hole and a detecting portion And a reflecting portion that reflects the output light source through the inspection hole with the welding tip and is inserted into the reflection insertion hole. Accordingly, by setting the distance between the welding tips at the time of inspection to be short, inspection error can be minimized, foreign substances can be prevented from flowing into the reflection panel, and the angle of the reflection panel can be adjusted and the reflection panel can be easily removed.

Description

{Welding tip inspection equipment}

The present invention relates to an apparatus for inspecting a welding tip used in a spot welder.

Generally, the spot welding is performed by locally heating the contact surface in such a manner that two base materials such as a metal plate are overlapped and electric current is flowed through the electrode tip while the electrode tip is placed above and below the base material, It is welding to attach two base materials.

Such spot welding is widely used in most industrial fields such as shipbuilding industry, automobile industry, and plant industry.

Particularly, a significant portion of the welding performed in the automobile production process is conducted by spot welding, and as a result of performing a lot of spot welding in producing one automobile, the spot welding affects the productivity and quality of the automobile very much.

Considering the above points, in a production site where a spot welding is repeatedly required in a certain pattern such as a production line of an automobile, an automatic spot welder based on a multi-joint robot is used to improve the quality and productivity .

On the other hand, the electrode tip used for spot welding is deformed by abrasion of the end portion as the welding operation is repeated, and an oxide film is formed. If the welding operation is continued in this state, the current density is lowered and welding defect occurs.

In order to prevent the welding defect as described above, a tip dresser is installed around the automatic spot welder to perform the polishing work for the electrode tip periodically provided in the automatic spot welder, that is, the dressing work.

The dressing operation is performed by rounding the end of the electrode tip using a cutter.

Although the electrode tip provided in the automatic spot welder is periodically polished using the tip dresser, if the electrode tip is not polished due to a defect in the cutter installed in the tip dresser or other causes And if it is not recognized on time, there is a problem that welding failure occurs and the produced product must be discarded or reworked, resulting in a large loss in time and cost.

In the case of the prior art, there is a problem that the sensing means is exposed as it is, and if the sensing means is contaminated with foreign matter, it causes a malfunction. Further, since the distance between the upper tip sensing means and the lower tip sensing means is too long, it is difficult to closely contact the welding tip, and the welding tip comes in direct contact with the sensing means, so that the sensing means is damaged or broken.

Korean Registered Patent No. 10-1194959 (Published on October 25, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to minimize the inspection error by setting a short distance between the welding tips at the time of inspection and to prevent foreign matter from entering the reflection panel, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a welding tip inspecting apparatus capable of easily detaching a reflecting panel while being adjustable.

In order to achieve the above object,

A body having at least one sensor insertion hole, an inspection hole connected to the sensor insertion hole and opened to the outside, and a reflection insertion hole connected to the sensor insertion hole and opened to the outside, At least one detection part inserted into the sensor insertion hole and a light source output from the detection part are reflected by the welding tip through the inspection hole and inserted into the reflection insertion hole And a reflection portion.

Further, it may further comprise a transparent body for sealing the inspection hole.

The apparatus may further include an air nozzle unit coupled to the body and spraying air to the transparent body.

In addition,

It is possible to prevent the light source output from the detection unit from being reflected by the transparent body and returning.

In addition,

A mounting block rotatably inserted into the body, and a reflection panel inserted into the mounting block at a predetermined angle.

The body may further include at least one adjuster for fixing the angle of rotation of the reflector to the body.

Further, it may further include an inflow prevention portion for preventing foreign matter from flowing into the reflection insertion hole.

The apparatus may further include a seating block having at least one air hole formed around the body so that the welding tip is seated.

The apparatus may further include a control unit for receiving information from the detection unit and determining the state of the welding tip.

The apparatus may further include an alarm unit connected to the control unit and notifying whether the welding tip is defective.

According to the present invention, by setting the distance between the welding tips at the time of inspection to be short, the inspection error can be minimized and the inspection reliability can be improved.

It is also possible to prevent foreign matter from flowing into the reflection panel.

Further, the angle of the reflection panel can be finely adjusted, and inspection errors can be further prevented.

It is also possible to prevent foreign matter from flowing into the reflection panel.

In addition, the reflective panel can be easily removed and removed, thereby facilitating replacement of the reflective panel and removal of foreign matter.

Further, by arranging the transparent body at an angle, it is possible to prevent the light source from being reflected and returned through the transparent body.

In addition, foreign matter can be prevented from accumulating on the transparent body by injecting air into the transparent body.

Further, by forming the passage for guiding the air, it is possible to increase the discharge pressure of the air, thereby further preventing the foreign matter from accumulating on the transparent body.

1 is an exploded perspective view of a welding tip inspection apparatus according to an embodiment of the present invention;
2 is a plan view of a welding tip inspection apparatus according to an embodiment of the present invention.
3 is a block diagram schematically illustrating a welding tip inspection apparatus according to an embodiment of the present invention.
4 is a sectional view taken along the line IV-IV in Fig.
FIG. 5 is an enlarged perspective view of a rear portion of a body of a welding tip inspection apparatus according to an embodiment of the present invention; FIG.
6 is a perspective view schematically showing another example of a body and a reflecting portion in a welding tip inspection apparatus according to an embodiment of the present invention.
FIG. 7 is a front sectional view schematically showing the operating state of the reflecting portion using the adjusting portion in FIG. 6;
8 is a front cross-sectional view schematically showing another example of the reflecting portion and the adjusting portion in the welding tip inspection apparatus according to the embodiment of the present invention.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which the technical parts already known will be omitted or compressed for the sake of brevity.

1 to 8, a welding tip inspection apparatus according to an embodiment of the present invention includes a base portion 1, a body 2, a detection portion 3, a reflection portion 4, a transparent body 5, A nozzle unit 6, an inflow preventing unit 8, a mounting block 9, a control unit 10, a housing 20 and an alarm unit 30. Here, the control unit 7 may further include an adjustment unit 7.

The base portion 1 is attached to an apparatus (not shown) for cutting the welding tip T and includes a base plate 11 and a bracket 12.

The base plate 11 is mounted on a device for cutting the welding tip T and is formed in a substantially rectangular panel shape and includes a plurality of screws for engaging with the bracket 12, the body 2, A hole H is formed.

The bracket 12 supports the body 2, the nozzle portion 6 and the seat block 9 and is screwed to the front upper surface of the base plate 11 and has a front surface shape of approximately &Quot; shape.

The bracket 12 has a coupling hole 121 for receiving an assembly of the body 2 and the nozzle unit 6 to be described later. That is, the coupling hole 121 corresponds to the body 2, and is formed to be lowered to insert the lower portion of the nozzle portion 6 into the lower portion. When the body 2 and the nozzle portion 6 are engaged with the coupling hole 121 and the body 2 is fitted with a mounting block 9 to be described later, It is possible to prevent leakage. Further, since the injected air moves only forward, the injection pressure can be raised, thereby preventing the foreign matter from being caught between the body 2 and the seat block 9, or removing the foreign matter easily.

The body 2 accommodates the detecting unit 3, the nozzle unit 6 and the reflecting unit 4 and includes a sensor block 21 and a sensor cover 22. [

The sensor block 21 is fitted in the fitting hole 121 of the bracket 12 and is screwed to the sensor block 21 and is formed in a substantially rectangular parallelepiped block shape.

The sensor block 21 is formed by recessing a region of the rear surface so that the nozzle block 61 is fitted to the rear surface.

The sensor block 21 is formed with sensor insertion holes 211 corresponding to the detection portions 3 on both sides thereof so that the detection portion 3 is inserted. The sensor insertion hole 211 includes a sensor insertion hole 212 which is recessed inwardly of the sensor block 21 so as to insert an elongated groove and a head portion of the detection portion 3 so that the electric wire of the sensor portion is drawn out rearward. At this time, the left sensor insertion port 212 and the right sensor insertion port 212 are communicated with each other.

In addition, the sensor block 21 may have a passageway 213 for guiding the air injected from the nozzle portion 6 on the upper and lower surfaces, respectively. Mounting grooves 214 into which the transparent body 5 to be described later are inserted may be formed in the passages 213, respectively. At this time, the passageway 213 and the mounting groove 214 may be formed to be inclined at a predetermined angle in a direction in which the reflector to be described later is inclined. A description thereof will be described later.

The mounting hole 214 of the sensor block 21 may be formed with an inspection hole 215 through which the light source output from the detection unit 3 passes. At this time, the inspection hole 215 is communicated with the sensor insertion port 212.

The sensor block 21 may further include a reflective insertion hole 216 through which the reflective portion 4 is inserted. Here, the reflection insertion hole 216 includes a cylindrical hole which is recessed backward and a slit 217 inclined at 45 degrees with respect to the center of the hole. At this time, the slit 217 may be formed to pass through the sensor insertion port 212 rearwardly. Accordingly, the reflection portion 4 can be inserted into the slit 217 and the reflection portion 4 can be easily attached and detached through the cylindrical hole, so that the foreign matter adhering to the reflection portion 4 can be easily removed.

The sensor cover 22 is screwed to both side surfaces of the sensor block 21 in the form of a substantially rectangular panel. This prevents foreign matter from flowing into the sensor insertion hole 211.

The detecting unit 3 detects the state of the welding tip T and is connected to a control unit 10 to be described later and includes a first sensor unit 31 and a second sensor unit 32.

Here, the first sensor unit 31 and the second sensor unit 32 use an optical sensor that detects well-known or known illuminance or color, and a detailed description thereof will be omitted.

The first sensor unit 31 detects the state of the welding tip T to be disposed on the upper part of the sensor block 21 through the reflected light source to generate information. (Not shown). A description thereof will be described later.

The second sensor unit 32 detects the state of the welding tip T to be disposed below the sensor block 21 through the reflected light source to generate information. (Not shown). A description thereof will be described later.

The reflecting part 4 reflects the light source output from the detecting part 3 and is formed into a rectangular panel shape in which one surface or both surfaces are reflected and is fitted to the slit 217 of the sensor block 21. The light source output from the first sensor unit 31 is emitted through the inspection hole 215 formed in the upper portion of the sensor block 21 through the reflection unit 4 and is output from the second sensor unit 32 Is emitted through the reflection portion 4 through the inspection hole 215 formed in the lower portion of the sensor block 21. [

The transparent body 5 prevents foreign objects from flowing into the sensor block 21 through the inspection hole 215 and corresponds to the mounting groove 214 of the sensor block 21, Respectively. At this time, the transparent body 5 may be mounted such that the reflecting portion 4 is inclined at a predetermined angle in an inclined direction. That is, the angle A between the transparent body 5 and the reflecting portion 4 can be formed to be 40 degrees or less. For example, when the angle between the transparent body 5 and the reflective portion 4 is 45 °, when a light source reflected through the reflective portion 4 passes through the transparent body 5, a part of the light source is reflected by the transparent body 5 A detection error may occur. However, if the angle A between the transparent body 5 and the reflective portion 4 is set to 40 degrees or less, even if the light source is reflected through the transparent body 5, the light source reflected through the transparent body 5 is reflected by the reflective portion 4 (Not shown). Accordingly, the detection error can be minimized, and the reliability of the inspection can be increased.

On the other hand, the upper surface of the transparent body 5 may be disposed on the same plane as the upper surface or the lower surface of the passage 213. Accordingly, it is possible to prevent the foreign matter from sticking to the transparent body 5 due to the air ejected from the nozzle unit 6, or to remove the foreign matter sticking out easily.

The nozzle unit 6 includes a nozzle block 61 and a tube 62 for preventing foreign matter from sticking or removing foreign materials stuck to it.

The nozzle block 61 is formed in a substantially rectangular parallelepiped shape and has an inlet port connected to the tube 62 on the rear surface and two jet ports 611 formed on the top and bottom of the nozzle block 61 respectively. At this time, the inlet port and the injection port 611 are communicated with each other, and the injection port 611 is disposed at a position corresponding to the passage 213 of the sensor block 21.

On the other hand, the jetting port 611 of the nozzle block 61 may be formed in the shape of a long hole and may be formed to be inclined in the same direction as the path 213.

Accordingly, the air injected through the injection port 611 moves along the passage 213, thereby preventing foreign matter from accumulating on the transparent body 5 or removing foreign matter sticking to the transparent body 5 easily.

Here, the injection port 611 of the nozzle block 61 may be formed to be inclined upward or downward toward the upper surface or the bottom surface of the passage 213. Accordingly, the air injected through the injection port 611 strikes the upper surface or the lower surface of the passage 213 in an inclined manner, so that foreign matter is prevented from being accumulated on the transparent body 5, or foreign matters sticking to the transparent body 5 can be more easily removed have.

The tube 62 supplies air and has one end connected to the inlet of the nozzle unit 6 and the other end connected to a feeding means (not shown) such as a known or known pump.

The adjustment portion 7 adjusts the angle of the reflection portion 4 and includes a rotation block 71 and adjustment means 72. (See Figs. 6 and 7)

6 and 7, the sensor block 21 'may omit the slit 217 of the sensor block 21 described above and may extend the reflective insertion hole 216' And the reflective insertion hole 216 'may communicate with the inspection hole 215 and the sensor insertion hole 212. [ In addition, the sensor block 21 'may be further provided with two screw holes H through which the adjusting means 72 is inserted. In addition, the sensor block 21 'corresponds to the above-described sensor block 21, and a detailed description thereof will be omitted.

Here, it is assumed that the screw hole H is formed on the upper surface and the lower surface of the passage 213, respectively.

The rotation block 71 fixes the reflection portion 4 and corresponds to the modified reflection insertion hole 216 'and is inserted into the reflection insertion hole 216'. Accordingly, the rotation block 71 is rotatable from the reflection insertion hole 216 '.

The rotation block 71 is formed with a slit 217 'for inserting the reflection portion 4 on the rear surface thereof and a known or well-known wedge bolt or the like for fixing the reflection portion 4 fitted to the slit 217' The fixing means 712 of the rotating block 71 can be fitted on the outer surface of the rotating block 71. [ Accordingly, the reflecting portion 4 can be easily removed from the rotating block 71 through the fixing means 712. [

Further, the rotation block 71 may be provided with an adjustment groove 711 around the rotation block 71 in front. At this time, the adjustment groove 711 may have a substantially triangular or wedge-shaped cross section. A description thereof will be described later.

The adjustment means 72 fixes the rotation angle of the rotation block 71 and is fitted in a screw hole H formed additionally in the rotation block 71 using a known or well known tongue wrench bolt or the like . At this time, when the adjusting means 72 is engaged with the sensor block 21 'in a state where the rotating block 71 is fitted in the reflection insertion hole 216, (711). Accordingly, when the upper adjustment means 72 is released and the lower adjustment means 72 is tightened, the lower adjustment means 72 pushes one side of the adjustment groove 711 and the rotary block 71 rotates to the right. Therefore, when the angle of the reflecting portion 4 is slightly changed, the angle of the reflecting portion 4 can be precisely and finely adjusted by rotating the rotating block 71 through the adjusting means 72. In addition, since the adjusting means 72 is fitted in the adjusting groove 711 of the rotating block 71, it is possible to prevent the rotating block 71 from separating from the sensor block 21 ' The rotary block 71 can be fixed firmly by holding the rotary block 71.

On the other hand, as shown in Fig. 8, the adjusting means 72 may be arranged on the upper part of the sensor block 21 ', respectively, in order to easily rotate the rotating block 71. [ At this time, the rotation block 71 may be changed to a position corresponding to the adjustment means 72 by the adjustment groove 711 '. Accordingly, the angle of rotation of the reflecting portion 4 can be more easily adjusted by adjusting the adjusting means 72 at the upper portion.

The inflow preventing portion 8 prevents the inflow of foreign matter into the reflection insertion hole 216 and is formed in a substantially rectangular panel shape and is screwed onto the front surface of the sensor block 21. [ At this time, the inflow preventing portion 8 is formed to close the front opening of the reflection insertion hole 216, but not to block the passage 213, or is mounted on the sensor block 21. [ Accordingly, it is possible to prevent foreign matter from flowing into the reflection insertion hole 216.

6, the inflow preventing portion 8 'may be engaged with the front end of the rotating block 71. [ In addition, a grip portion 40 may be further provided on the front surface of the inflow preventing portion 8 'so as to easily detach the rotary block 71 from the sensor block 21'. This makes it possible to prevent foreign matter from flowing into the reflection insertion hole 216 and to easily replace the rotation block 71 and the reflection portion 4 through the grip portion 40.

The seating block 9 guides the welding tip T while protecting the sensor block 21, and is formed into a box shape of a rectangular parallelepiped having open front and rear surfaces.

In addition, the seating block 9 is formed such that both rear sides extend outwardly so as to be engaged with the bracket 12 and the screw S.

The seating block 9 is formed on the upper surface and the lower surface of the seating block 9 with an air hole 91 corresponding to the end of the welding tip T so as to guide the welding tip T, respectively. At this time, the air hole 91 is disposed at a position corresponding to the inspection hole 215, and each of the air hole 91 is formed so that a central region thereof is penetrated into the interior. Accordingly, when the welding tip T is inserted into the air hole 91, the light source output from the detection unit 3 is automatically aligned with the welding tip T Respectively.

The housing 20 protects the wires and the tube 62 connected to the detection unit 3 and the alarm unit 30 while supporting the alarm unit 30. The housing 20 is formed by bending a panel having a substantially rectangular shape, And is connected to the base plate 11 and the bracket 12 by a screw (S).

The alarm unit 30 informs the operator of the state of the welding tip T and is connected to the control unit 10 and uses a known or known lamp or the like and two alarm units 30 are connected to the housing 20 As shown in Fig. That is, the alarm unit 30 on the left side indicates the state of the upper welding tip T and the alarm unit 30 on the right side indicates the state of the welding tip T on the lower side. Thus, when the information on the detection of the welding tip T deviates from the value set in the control unit 10, the alarm unit 30 is activated and the welding tip T corresponding to the operated alarm unit 30 is operated by the operator (Not shown), and the end of the welding tip T is cut.

The control unit 10 receives the information generated from the detection unit 3 and discriminates it and informs the discriminated information through the alarm unit 30 and is connected to the detection unit 3 and the alarm.

Further, the control unit 10 may input a set value according to the material of the welding tip T.

Hereinafter, an operation state of a welding tip inspection apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The welding tip (T) is seated on the hole (91).

When the welding tip T is seated in the seat cushion, a light source is outputted from the first sensor unit 31 and the second sensor unit 32, and the output light source is reflected by the reflection unit 4 do.

The reflected light source passes through the inspection hole 215, the transparent body 5 and the air hole 91 in order, and the light source passes through the welding tip T, respectively.

That is, the light source output from the first sensor unit 31 is transmitted to the upper welding tip T, and the light source output from the second sensor unit 32 is transmitted to the lower welding tip T.

The light source irradiated on the welding tip T is reflected and transmitted again to the reflecting portion 4 through the aperture opening 91, the transparent body 5 and the inspection hole 215.

The light source transmitted to the reflecting portion 4 is reflected by the reflecting portion 4.

At this time, the light source reflected at the upper part is inputted to the first sensor part 31, and the light source reflected at the lower part is inputted to the second sensor part 32. [

The light source input to the first sensor unit 31 and the second sensor unit 32 is transmitted to the control unit 10 and the control unit 10 identifies the light source and informs the outside through the alarm unit 30.

The operator can confirm the state of each welding tip (T) through the alarm unit (30).

When the reflection unit 4 is turned and the light source is not properly transmitted to the welding tip T, the angle of the reflection unit 4 is adjusted through the adjustment unit 7, Fix the position. As a result, inspection errors can be minimized or malfunctions can be prevented.

Here, if foreign substance such as oil or the like is adhered to the transparent body 5, the foreign matter adhering to the transparent body 5 is wiped off after the seizing block 9 is detached.

If a foreign matter is adhered to the reflective portion 4, the reflective portion 4 is separated from the sensor block 21 to remove foreign matter adhering to the reflective portion 4. [

Therefore, it is possible to prevent foreign matter from accumulating by injecting air into the transparent body 5 at normal times, and to remove the foreign body by easily separating the foreign bodies from the transparent body 5 and the reflective portion 4.

In particular, since the transparent body 5 is inclined, it is possible to prevent the output light from being reflected back through the transparent body 5.

In describing the present invention described above, the same reference numerals are used for the same configurations even if the embodiments are different, and the description thereof may be omitted if necessary.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Shall not be construed as being understood. Therefore, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. The present invention is not limited thereto.

One; Base portion
11; Base plate
12; Bracket
121; Coupling hole
2; Body
21, 21 '; Sensor block
211; Sensor insertion hole
212; Sensor insertion port
213; Passage
214; Mounting groove
215; Inspection hole
216, 216 '; Reflective insertion hole
217, 217 '; Slit
22; Sensor cover
3; The detection unit
31; The first sensor unit
32; The second sensor unit
4; Reflection portion
5; Transparency
6; The nozzle portion
61; Nozzle block
611; Nozzle
62; tube
7; Regulating section
71; Rotating block
711, 711 '; Adjusting groove
712; Fixing means
72; Adjusting means
8, 8 '; The inflow-
9; Seating block
91; An early start
92; Guide groove
10; The control unit
20; housing
30; Alarm department
40; Grip section
S; screw
H; Screw hole
T; Welding tips

Claims (10)

A body having at least one sensor insertion hole and an inspection hole connected to the sensor insertion hole and opening to the outside, and a reflection insertion hole connected to the sensor insertion hole and opened to the outside;
At least one detector inserted into the sensor insertion hole for inspecting a surface state of the welding tip by measuring a reflected light source after irradiating the welding tip with a light source; And
And a reflection part that reflects the light source output from the detection part through the inspection hole with the welding tip and is inserted into the reflection insertion hole,
The reflection unit may include a mounting block rotatably inserted into the body, a reflection panel inserted into the mounting block at a predetermined angle, and at least one controller for fixing the rotation angle of the reflection unit to the body.
Welding tip inspection device.
The method according to claim 1,
And a transparent body for sealing the inspection hole
Welding tip inspection device.
3. The method of claim 2,
And an air nozzle unit coupled to the body and spraying air to the transparent body
Welding tip inspection device.
3. The method of claim 2,
Wherein the transparent body is set to have an angle of 40 degrees or less with respect to the reflective portion so as to prevent the light source output from the detection portion from being reflected by the transparent body and returning.
Welding tip inspection device.
delete delete The method according to claim 1,
And an inflow prevention part for preventing foreign matter from flowing into the reflection insertion hole
Welding tip inspection device.
The method of claim 3,
And a seating block having at least one air hole formed around the body for seating the welding tip thereon
Welding tip inspection device.
The method according to claim 1,
And a control unit for receiving the information from the detection unit and determining the state of the welding tip
Welding tip inspection device.
10. The method of claim 9,
And an alarm unit connected to the control unit and notifying whether the welding tip is defective or not
Welding tip inspection device.

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