KR101828962B1 - Tip alignment inspection apparatus - Google Patents

Abstract

The present invention relates to a tip alignment inspection apparatus. More specifically, the tip alignment inspection apparatus which is able to more smoothly and accurately check a tip alignment state of a spot welding gun used for welding a vehicle body frame of a vehicle or the like by checking an upper tip and a lower tip at once without separately checking the upper tip and the lower tip. To this end, the tip alignment inspection apparatus comprises: a cylinder block portion; a body block portion; a teaching block portion; and an inspection portion having a tongs tip. According to whether or not the inspection portion having the teaching block portion and the tongs tip is electrically conductive, the alignment states of the upper tip and the lower tip are simultaneously detected.

Description

[0001] The present invention relates to a tip alignment inspection apparatus,

[0001] The present invention relates to a tip alignment inspection apparatus, and more particularly, to a tip alignment inspection apparatus for confirming a tip alignment state of a spot welding gun used for welding a vehicle body frame of a vehicle, And more particularly, to a tip alignment inspection apparatus configured to be more smooth and accurate.

Generally, in mass production of certain products such as automobile production lines, spot welding is mainly used because the heating time is very short as compared with other welding, the work speed is high, and the heating range is narrow and residual stress and deformation are small. .

Such spot welding is usually carried out by mounting the welding gun on a robot or mounted on a frame provided on the ground, and there is a welding gun in which a welding operation is performed in the vertical direction or a welding operation is performed in the left and right direction. Or X type.

The welding gun includes a body having a timer, a contactor, a transformer and the like for welding, a shank which is installed at the lower end of the body and on an upper portion of an arm rotatably mounted on the hinge shaft, And a welding tip to which welding is effected.

Such a welding tip is moved along the welding line so that when the upper tip 10 and the lower tip 20 are symmetrical to each other as shown in Fig. 1 (a) Welded state.

However, referring to FIG. 1 (b), when welding is performed or welding occurs in the course of the tip dressing process or the tip changing process, or the electrode is bent and the welding tip is out of the allowable range of the alignment reference line 30, In other words, the welding can be performed in an abnormal state, and welding in such an abnormal state eventually causes welding failure.

For this reason, the normal or even alignment of the welding tip serves as a factor that greatly affects the quality of the welding.

(Patent Document 0001) Korean Patent Registration No. 10-1278543 and Korean Patent Registration No. 10-1481373 disclose an apparatus for inspecting tip alignment state of such a welding gun.

Referring to FIG. 2, a tip alignment inspection apparatus according to the related art is arranged to move the upper tip 10 to a center position of the inspection hole 3 of the movement inspection block 2, When the upper tip 10 is inserted into the inspection hole 3 and the central axis of the upper tip 10 deviates from the alignment reference line XX by more than an allowable range, And comes into contact with one side edge portion of the inspection hole 3.

Therefore, the state where the movement test block 2 is pushed in the insertion direction while the upper tip 10 is lowered and the movement test block 2 is moved downward due to the elastic force of the spring 4b is performed by a sensor Detection.

Accordingly, the control unit receiving the detection signal of the sensor sounds an alarm and recognizes that the alignment of the tip is bad to the operator.

On the other hand, the lower tip 20 is checked while confirming the alignment of the upper tip 10, and then separately repeating the above procedure.

However, the tip alignment inspection apparatus according to the related art has a problem that it takes a long time to inspect the upper tip 10 and the lower tip 20 separately, 20 are moved to the inspection hole 3 and moved to the inspectionable position,

Also. The complexity of such teaching has the potential to interfere with other peripheral devices.

In addition, when the inner circumferential surface of the inspection hole 3 and the upper tip 10 or the lower tip 20 to be inspected are frictioned at the time of inspection, the movement test block 2 is forced to be pulled upward for a predetermined period Lt; / RTI >

SUMMARY OF THE INVENTION Accordingly, there is a need for a tip alignment inspection apparatus that can identify the upper tip and the lower tip of a welding gun at the same time, thereby facilitating the checking process.

Korean Registered Patent No. 10-1278543 (registered on June 19, 2013) Korean Registered Patent No. 10-1481373 (Registered on May 1, 2015)

It is an object of the present invention to provide a tip alignment inspection apparatus capable of confirming an upper tip and a lower tip of a spot welding gun at one time and performing a confirmation process smoothly and accurately.

According to an aspect of the present invention, there is provided a tip alignment inspection apparatus including: a cylinder block portion fixedly connected to a set position; A body block portion connected to the front of the cylinder block portion by a cylinder rod so as to be movable forward and backward under control; A teaching block part having a negative (-) electrode protruded in front of the body block part and having a seating surface which is horizontally moved to be brought into contact with the upper tip of the welding gun so as to correspond to the lower tip; And an inspecting unit having bilateral clamping tips having positive (+) electrodes on the front side and being fixed to the body block and horizontally moved according to the control, so that the clamping tips are engaged to wrap the upper and lower tips.

According to the control, the clamping tip is opened and closed, and whether the upper tip and the lower tip of the spot welding gun are in the steady state or the abnormal state is detected at the same time depending on whether the teaching block portion and the inspection portion are energized or not.

Preferably, the inspection unit includes a left and right guide block connected to the body block at both sides by a cylinder rod, and a left and right guide blocks disposed on the left and right sides of the body block so as to cover the upper and lower tips of the welding gun. And a left and right tip clamp extending forward of the right guide block.

The clamping tip is constituted by a semicircular plate fixedly coupled on one surface of the tip clamp and divided into an upper clamping tip surrounding the upper tip and a lower clamping tip surrounding the lower tip.

Further, the seating surface of the teaching block portion is characterized by a curved surface shape corresponding to the upper tip and the lower tip.

Preferably, the seating surface of the teaching block is divided into an upper surface on which the upper tip is seated and a lower surface on which the lower tip is seated.

On the other hand, the teaching block portion includes an upper projecting tip projecting forwardly of the seating surface in contact with the leading upper tip and having an inner spring, a lower projecting tip projecting forwardly of the seating surface in contact with the lower tip, .

On the other hand, the tip alignment inspection apparatus includes a reverse confirmation sensor for confirming whether the body portion is pushed backward according to a pressing force when the corresponding upper and lower tips are seated on the seating surface, and an opening / closing confirmation sensor And a sensor unit constituted by an energization sensor for confirming whether or not to energize.

The controller may further include a controller for transmitting an abnormality of an upper tip and a lower tip of the welding gun to a separately installed alarm notification unit according to a signal of the energization sensor or controlling operation of the tip alignment inspection apparatus according to an external control signal.

As described above, according to the tip alignment inspection apparatus of the present invention, the upper tip and the lower tip of the welding gun corresponding to each other are in a normal state or abnormal state at one time depending on whether or not the inspection portion having the teaching block portion and the (+ It is possible to confirm whether or not it is in a state.

In addition, the upper tip and the lower tip are brought in a state in which they are matched with each other, so that teaching is easy and there is no interference with other peripheral devices.

In addition, since the upper tip and the lower tip can be simultaneously identified, the working time is reduced and the efficiency of the entire welding process is increased.

1 is a view for explaining an alignment state of an upper tip and a lower tip;
2 is a schematic diagram showing an apparatus for inspecting a tip alignment state according to the prior art.
3 is a perspective view showing a tip alignment inspection apparatus according to the present invention.
4 is a perspective view of the tip alignment inspection apparatus according to the present invention as viewed from the bottom.
5 to 9 are schematic views showing an inspection process of the tip alignment inspection apparatus according to the present invention.

Hereinafter, a preferred embodiment of the tip alignment inspection apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, the front indicates the portion of the teaching block or its direction, and the rear indicates the portion opposite to the front or the direction thereof.

In addition, the steady state of the upper tip and the lower tip of the welding tip described in the present invention refers to a state in which the upper tip and the lower tip are not offset from each other in the alignment reference line (FIGS. 1 and 30) It is determined that the state is a state that is opposite to the normal state and is shifted.

In the following description of the present invention, the same reference numerals are used to designate the same elements as the conventional art, and a detailed description of known functions and configurations will be omitted so as not to obscure the gist of the present invention.

FIG. 3 is a perspective view showing an open state of the tip alignment inspection apparatus according to the present invention, FIG. 4 is a perspective view showing a closed state of the tip alignment inspection apparatus according to the present invention, Fig.

As shown in the drawing, the tip alignment inspection apparatus 100 according to the present invention is characterized in that the upper and lower tips 10 and 20 of the welding gun are aligned with upper and lower alignment reference lines (FIGS. 1 and 30) That is, whether it is a normal state or an abnormal state.

The tip alignment inspection apparatus 100 according to the present invention comprises a cylinder block 110, a body block 120, a teaching block 130 and an inspection unit 140, The presence or absence of an alignment state of the welding tip is checked according to whether or not the inspection unit 140 is energized.

The tip alignment inspection apparatus 100 according to the present invention is provided to fix alignment of the upper tip 10 and the lower tip 20 provided in the shank of the welding gun,

In other words, a tip dresser for the dressing operation or a tip replacement device for performing a replacement operation of the welding tip is installed in a position where an alignment confirmation of the welding tip is required during the operation.

Specifically, the cylinder block portion 110 is fixedly coupled to a predetermined position and has a cylinder body therein.

The body block part 120 is connected to the cylinder rod 111 so that the body block part 120 can be moved back and forth in accordance with the control in front of the cylinder block part 110.

The teaching block 130 may be fixed to the front of the body block 10 by contacting the upper tip 10 or the lower tip 20 to check whether there is an abnormality in alignment. (-) electrode and protruded.

At this time, the front surface becomes the seating surface 131 so that the upper tip 10 and the lower tip 20 can be horizontally moved while facing each other in correspondence with each other so that they can be seated while being in contact with each other.

 The seating surface 131 has a curved surface shape corresponding to the shape of the upper tip 10 and the lower tip 20 so that the upper tip 10 and the lower tip 20 can be contacted as much as possible. .

When the upper tip 10 and the lower tip 20 are brought into engagement for seating for inspection, the operator can check their pulling in most of the rear or side for safety, It is difficult to confirm whether or not the upper tip 10 and the lower tip 20 are normally brought into contact with the center of the teaching block portion 130.

The seating surface 131 has a curved surface shape in order to make it easy for the operator to confirm whether or not to enter.

On the other hand, the seating surface 131 is divided into an upper surface 131a on which the upper tip 10 is seated, and a lower surface 131b on which the lower tip 20 is seated.

To form the seating surface 131, the teaching block 130 preferably has a block shape of a " C ".

1, when the upper and lower tips 10 and 20 of the welding gun are generally brought into correspondence with each other for seating, the upper tip 10 and the lower tip 20 are welded to the welding gun So that the end portions can be inserted with an interval instead of being engaged with each other.

Accordingly, the teaching block 130 may be positioned on the seating surface 131 so that the upper tip 10 and the lower tip 20 can more easily contact the teaching block 130 having a negative electrode, And a protruding tip projecting forward of the protruding tip.

The protruding tip includes an upper protruding tip 132 protruding forward from the seating surface 131 and having a spring S to be brought into contact with the upper tip 10 to be drawn, And a lower protruding tip 133 protruding forward from the seating surface 131 and having a spring S in contact therewith.

Accordingly, even if the upper tip 10 and the lower tip 20 are inserted while being spaced apart from each other, they are in contact with the protruding upper protruding tip 132 and the lower protruding tip 133, Can be confirmed.

The inspection unit 140 has positive electrodes corresponding to the teaching block unit 130. The electrodes of the teaching block unit 130 and the inspection unit 140 may be reversed as necessary, to be.

The inspecting unit 140 includes a pair of clamping tips 141 having positive (+) electrodes at the front thereof. The inspecting unit 140 is fixed to the body block 120 and horizontally moved according to the control, It is engaged to wrap the upper tip and the lower tip simultaneously.

The inspection unit 140 includes left and right guide blocks 142 connected to both sides of the body block 120 by a cylinder rod and guide pins 142 on both sides of the guide blocks 142 according to the horizontal movement of the guide block 142. [ And a left and right tip clamp 143 extending forward of the left and right guide blocks 142 so as to cover the upper and lower tips of the welding gun.

At this time, the gripper tip 141 surrounds the upper tip 10 or the lower tip 20 according to a control signal, and protrudes to the upper tip or the lower tip side which is fixedly mounted on one surface of the tip clamp 143 And has a semicircular plate structure formed therein.

The clamping tip 141 is configured to be divided into an upper clamping tip 141a surrounding the upper tip 10 and a lower clamping tip 141a surrounding the lower tip 20. [

The left and right tip clamps 143 are preferably formed in a plate shape in which the upper clamp tip 141a and the lower clamp tip 141b are provided.

The tip alignment inspection apparatus 100 according to the present invention is configured such that the clamp tip 141 is opened and closed to enclose the upper tip and the lower tip according to the control and the tip 131 of the teaching block 130 The alignment of the upper tip 10 and the lower tip 20 of the spot welding gun is detected at the same time depending on whether or not the gripper tip 141 of the inspection unit 140 is energized.

That is, if the alignment of the welding tip is abnormal when the clamping tip 141 is engaged while wrapping the upper tip 10 and the lower tip 20, the upper tip or the lower tip that deviates from the alignment reference line may contact the clamping tip 141 (-) pole and (+) pole are energized at this time.

Although not shown in the drawings, the tip alignment inspection apparatus 100 is preferably configured such that the corresponding upper and lower tips are seated on the seating surface 131 and pressed against the seating surface 131, A reverse check sensor for confirming whether the body block 120 is pushed backward, an open / close confirmation sensor for confirming whether the clamp tip 141 is in the engaged state or open state, and an energization sensor for confirming whether the clip is open or closed And a sensor unit (not shown).

The control unit 150 transmits an abnormality of the upper tip and the lower tip of the welding gun to the separately provided alarm notification unit 160 according to the signal of the energization sensor or controls the operation of the tip alignment inspection apparatus according to an external control signal .

FIGS. 6 to 10 are schematic views showing the inspection process of the tip alignment inspection apparatus according to the present invention.

Hereinafter, the use state of the tip alignment inspection apparatus 100 according to the present invention will be described.

Referring to FIG. 6, there is shown a standby state for the tip alignment inspection apparatus 100 to check the alignment state of the upper tip 10 and the lower tip 20 of the welding gun. At this time, The upper clamping tip 141a and the lower clamping tip 141b are in the open state in which they are disengaged.

7, the upper tip 10 and the lower tip 20 of the welding gun are horizontally moved to the seating surface 131 of the teaching block portion 130 in a state where they correspond to each other.

8, the upper tip 10 and the lower tip 20 which are seated on the seating surface 131 push the seating surface 131 by the force of horizontally moving the teaching block 130 The force in the horizontal direction pushes the body block portion 120 backward and the body block portion 120 is moved backward along the cylinder rod 111 of the cylinder block portion 110. [

At this time, the backward movement sensor of the sensor unit senses the backward movement of the body part 120, and the control unit 150 transmits an operation signal to the examination unit 140 so that the tongue tip 141 of the examination unit 140 is instantaneously 8 to 9, that is, the gripper tip 141 is momentarily engaged and engaged with the upper tip and the lower tip.

The open / close operation of the clamping tip 141 is preferably performed for a time of about 1 second. When the clamping tip 141 is engaged and closed, the energizing sensor detects whether the positive (+) pole and the It is confirmed whether the tip 10 and the lower tip 20 are in a normal state or an abnormal state.

8, when the energization sensor is confirmed to be energized, the controller 150 determines that the alignment of the upper tip and the lower tip is abnormal and sends a signal to the external alarm notification unit 160 Allow the operator to confirm this.

The alarm notifying unit 160 may preferably be a siren or an alarm, and may be displayed on the screen by a display unit as necessary.

8, when the energization sensor is not confirmed to be energized, the clamping tip 141 moves to the state of FIG. 9, and the alignment of the upper tip 10 and the lower tip 20 is in a normal state It is judged that the process of welding is continued.

As described above, the tip alignment inspection apparatus 100 according to the present invention can confirm whether the upper tip 10 and the lower tip 20 of the welding gun corresponding to each other are in a normal state or an abnormal state at one time It has an effect.

In addition, the upper tip and the lower tip are brought into an engaged state to facilitate teaching, and there is no interference from other peripheral devices, thereby facilitating the operation.

In addition, since the upper tip and the lower tip can be simultaneously identified, the working time is reduced and the efficiency of the entire welding process is increased.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is not.

100: tip alignment inspection device
110: Cylinder block part
120: Body block part
130: Teaching block part
131: seat face
140:
141: Tong tip
142: guide block
143: Tip Clamp
150:
160: Warning notification section

Claims (8)

A cylinder block portion 110 fixedly connected to the set position;
A body block 120 connected to the front of the cylinder block 110 by a cylinder rod 111;
And a seating surface 131 protruding from the front of the body block 120 and protruding therefrom and being horizontally moved while being in contact with the upper tip and the lower tip of the welding gun in a corresponding manner, A teaching block 130 which is pushed rearward by the upper and lower tips of the welding gun in contact with the seating surface 131 and is pushed by the pressing force and moved backward with the body block 120;
And is fixed to the front of the body block 120 with a pair of clamping tips 141 having positive electrodes on the front side thereof. When the body block 120 moves backward, (140) for instantly wrapping and engaging the upper tip and the lower tip;
The upper tip and the lower tip of the welding gun may be in a normal state in which they are not misaligned with respect to the alignment reference line according to whether or not the teaching block portion 130 and the inspection portion 140 are energized when the clamping tip 141 is engaged according to the control, And detects whether or not an abnormal state is detected.
The method according to claim 1,
The inspecting unit (140)
The left and right guide blocks 142 connected to both sides of the body block part 120 by cylinder rods and the clamping tips 141 on both sides of the guide blocks 142 are moved to the upper tip and the lower part of the welding gun 142 according to the horizontal movement of the guide block 142. [ And a left and right tip clamp (143) extending forward of the left and right guide blocks (142) so as to cover the tip.
3. The method of claim 2,
The tongue tip (141)
A semicircular plate fixedly coupled to one surface of the tip clamp 143 and divided into an upper clamp tip 141a surrounding the upper tip and a lower clamp tip 141b surrounding the lower tip. Tip alignment inspection device.
The method according to claim 1,
The seating surface (131) of the teaching block (130)
And the tip alignment inspection device is a curved surface shape corresponding to the upper tip and the lower tip.
The method according to claim 1 or 4,
The seating surface (131) of the teaching block (130)
And an upper surface (131a) on which the upper tip is seated and a lower surface (131b) on which the lower tip is seated.
The method according to claim 1,
The teaching block unit 130 includes:
An upper protruding tip 132 protruding forward of the seating surface 131 in contact with the incoming upper tip and having an inner spring S and a second protruding tip 132 protruding forwardly of the seating surface 131 in contact with the lower tip, And a lower projecting tip (133) having an inner spring (S).
The method according to claim 1,
A reverse check sensor for confirming whether or not the body block portion 120 is pushed back by a pressing force while the corresponding upper and lower tips are seated on the seating surface 131, And a sensor unit configured by an open / close confirmation sensor for confirming whether or not the power supply is turned on, and an energization sensor for confirming whether or not the power supply is turned on.
8. The method of claim 7,
And a controller 150 for transmitting an abnormal state of the upper tip and the lower tip of the welding gun to the alarm notifying unit 160 or controlling the operation of the tip alignment inspection apparatus according to an external control signal according to a signal of the energization sensor Wherein the tip aligning inspection apparatus comprises:

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