JPH03291175A - Drawing-out device for electrode tip - Google Patents

Abstract

PURPOSE:To easily replace the tip without damaging a shank and the tip by pressing an elastic material against the tip and allowing it to adhere closely and to grasp the tip, moving it in the axial direction and drawing out the tip. CONSTITUTION:When a case 3 is pressed in the axial center direction, a shank holding elastic material 4 and a drawing-out elastic material 5 which are pressed against a shank 1 and an electrode tip 2 adhere closely to the shank 1 and the electrode tip 2, respectively, and protrude gradually to opening parts 11, 12. Since the opening part 11 is small, they protrude mostly to the opening part 12 side. In the process in which they are pressed and protrude to the opening part 12 side, a core 6 is pushed by the shank holding elastic material 4 and extruded in the direction of tip of the tip 2. By the tip of the axial center side of the extruded core 6, the drawing-out elastic material 5 of the part for gripping the electrode tip 2 is also extruded, and the electrode tip 2 is drawn out. The core 6 itself also moves in the axis center direction, intrudes into a crushed clearance 7, pushes it open and drawing-out of the electrode tip 2 is quickened.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrode tip extraction device for resistance welding, and particularly to an extraction device suitable for replacing electrode tips of welding robots.

(Prior Art) Electrode tips for resistance welding are attached by being inserted into the shank with a taper, and as they wear out, they need to be replaced from time to time.

Conventionally, when replacing a tip, an operator would use a tool to pull it out and replace it with a new tip.

(Problems to be solved by the invention) However, the tapered and tightly inserted electrode tip does not come out easily, so skill is required to quickly replace it in a short period of time, and the shank side is often damaged. When using a welding robot, there are problems with the danger of the worker entering the robot's operating range and the time required for the work.

(Means for Solving the Problems) According to the present invention, an elastic material is pressed against a chip to tightly grip the chip, and the chip is removed by moving the elastic material in the axial direction.

Specifically, it is divided into the shank and around the electrode tip,
means for confronting the elastic material containing the core; means for pressing the elastic material in the axial direction; and means for arranging a case having an opening through which the pressed fS elastic material extends toward the tip of the electrode tip. It is configured.

<Function> In the electrode tip extraction device of the present invention having the above-mentioned structure, the elastic material is pressed in the axial direction, and first comes into close contact with the tip and grasps it.

When pressed further, the elastic material extends into the opening formed toward the tip of the electrode tip.

In the process of such shape deformation of the elastic material, the core is pushed out toward the tip of the electrode tip by being pushed by the shank-side elastic material.

By this extrusion, the elastic material in contact with the tip of the core on the axis side is pressed and pushed out toward the tip end, and the electrode tip is extracted.

(Example) The features of the present invention will be specifically described below with reference to the drawings.

Electrode tip 2 inserted into shank 1 with a taper
Around the periphery, a case 3 divided into approximately semicircles is arranged facing each other, and inside thereof, a shank holding elastic member 4 made of urethane rubber and a pull-out elastic member 5 made of urethane rubber are arranged.

A core 6 is arranged between both elastic materials.

The axial center of the case 3 is provided with openings 11 and 12, which are small on the shank side and large on the tip side.

To remove the electrode tip, apply pressure with a cylinder, etc. 8! This is done by pressing the case 3 configured as described above in the axial direction using horizontal arrows 9 (not shown).

The shank holding elastic material 4 and the extraction elastic material 5, which are pressed against the shank 1 and the electrode tip 12, are pressed against the shank 1 and the electrode tip 12, respectively. Closely contact the pole tip 2 and open the opening 11.1.
It gradually extends to 2.

In real numbers, since opening IJ is small, most of the openings are opening 1.
Extend to the 2nd side.

In the process of being pressed and extending into the opening 12111, the core 6 is pushed out by the shank holding elastic member 4 toward the tip end.

By the tip of the extruded core 6 on the axis side, the extraction elastic material 5 in the portion that grips the electrode tip 2 is also extruded, and the scraping tip 2 is extracted.

During the above process, the core 6 itself moves in the axial direction, so it cuts into the crushed clearance 7 and pushes it open to facilitate extraction of the electrode tip.

To ensure removal, press repeatedly.

Further, the cutting pressure for moving in the axial direction and the extraction pressure in the circumferential direction may be adjusted by dividing the core or changing the shape and dimensions.

The core is made of a hard elastic material, and the circumferential extraction pressure is
! You may adjust it.

Shank holding elastic material 4. For the 50 pieces of elastic material to be extracted, the ratio of adhesion and extraction pressure can be adjusted to tA by combining shapes and materials, 1 division, 1 overlap, 1 hollow part, etc.

After enclosing the case 3, a member may be inserted into the case to press the shank holding elastic member 4.

<Effects of the Invention> As described above, the electrode tip extracting device M of the present invention has the elastic material disposed around the scraper tip in the process of being pressed and pushed out into the opening. Because the material is pushed out and extracted using the core, there is no damage to the shank or tip as with conventional methods.

Further, since the device of the present invention is simply inserted into the electrode tip and pressed, no skill or even an operator is required.

To attach the electrode tip, it can be attached using a pressure mechanism built into the welding device, and it is only necessary to bring the electrode tip to the stereotactic hole.

Therefore, when combined with the extraction device of the present invention, it can be easily used as an electrode tip replacement device, and can automatically replace electrodes of multiple welding devices simultaneously in a short time without entering the operating range of the robot. Yes, you can, and the effect is tremendous.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of the electrode chip extraction device of the present invention. FIG. 2 is a sectional view showing a state in which the electrode tip is removed by the apparatus of the present invention. 1, shank, 2. Electrode chip 1.3. Case 4, shank holding elastic material, 5. Extraction elastic material 6, core, 7. Clearance, 9. Arrow indicates pressing force, opening 13 formed at 11.12°, arrow indicates no extraction. Case 3

Claims (1)

[Claims] 1) A means for confronting the elastic material which is divided around the shank and the electrode tip and includes a core, a means for pressing the elastic material in the axial direction, and a means for pressing and crushing the elastic material in the axial direction. 1. An electrode tip extraction device comprising means for arranging a case having an opening in which an elastic material extends toward the tip of the electrode tip. 2) The electrode chip extracting device according to claim 1, wherein the core moves in the axial direction, cuts in between the elastic members and spreads them out to facilitate extraction. 3) The electrode tip extraction device according to claim 1, wherein the electrode tip extraction device is characterized in that after enclosing the electrode tip in a case, a member is inserted into the case to press the shank side elastic material.