JPH0530867Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a polishing tool for polishing the electrode of a spot welding machine.

[Conventional technology] Conventionally, in order to polish the electrode of a spot welding machine,
Means such as grinding with a file or removing the electrode and turning it have been taken.

[Problems to be solved by the invention] In the above-mentioned conventional technology, it is difficult to finish the contact surface smoothly during welding by grinding with a file. Turning also requires additional mechanical work, tends to be more consuming, and the labor involved has led to the suspension of welding operations.

[Means for solving the problem] The spot welding electrode polishing tool according to this invention has the following features:
A truncated conical mortar-shaped recess 1, 1 is provided at both ends of the short cylinder, and a plurality of notched grooves 4a connecting the truncated conical surface 2 and the outer circumferential surface 3 are provided radially, and at least a truncated conical surface is provided. 2 and the corner 5 of the notch groove 4a
A hard fine abrasive material 6 is adhered to the truncated conical surface 2 to form a piece-shaped polishing tool 7, and a cylindrical part 7a into which the outer circumferential surface 3 of the piece-shaped polishing tool 7 is fitted, and the cylindrical part 7a. an edge 7b provided on one end surface and directed toward the center in the radial direction;
A turning handle 8 consisting of a rod-shaped grip portion 7c projecting in the diametrical direction of the outer periphery of the cylindrical portion 7a is fitted into the piece-shaped polishing tool 7, and a bolt for tightening the polishing tool is inserted into the cylindrical portion 7a from the outside in the radial direction. 10 is screwed in.

[Example] As shown in FIGS. 1 and 2, the notch groove has a diameter line passing through the bottom of the mortar-shaped depression 1 as the bottom of the groove, and the upper and lower notch grooves 4a, 4a are not in communication; Fourth
As shown in the figure and FIG. 5, it penetrates in the direction of the central axis,
There are cases where the upper and lower notch grooves 4a and a portion 4b of 4a are in communication with each other.

The radial notch grooves 4a are preferably arranged at equal angular intervals, and the number is preferably 3 to 6.

Further, the upper and lower notch grooves may not be provided vertically symmetrically, but may be provided offset.

The hard fine abrasive material 6 is, for example, what is called diamond powder.

The means for polishing by bonding an abrasive material is already a known technique, such as the example of making a file by bonding an abrasive material to a board. This is a well-known structure such as a die handle.

Furthermore, the cross-sectional shape of the cutout groove 4a in FIGS. 1 and 2 may have various cross-sectional shapes as shown in FIGS. 3a, b, and c.

[Function] The spot welding electrode polishing tool obtained by carrying out the present invention intervenes between the electrodes 9a and 9b, and the force of the welding machine presses the polishing tool 7 with the electrodes 9a and 9b, causing the rotating handle 8 to rotate. Possibly electrodes 9a, 9
Achieve polishing b.

In this case, the cutting action of the corner portion 5 allows rapid polishing.

In the case of FIGS. 1 and 2, polishing debris is discharged in the radial direction through the upper notch groove 4a,
Further, polishing debris is discharged downward through the lower notch groove 4a. Furthermore, in the case of FIGS. 4 and 5, polishing debris is discharged downward through the notched groove 4b.

[Effects of the invention] According to the invention, both opposing electrodes can be simultaneously polished. The pressure required for polishing is performed by the force of the welding machine, and an efficient and stable polishing operation can be achieved by simply intervening a piece between the electrodes 9a and 9b and rotating the piece.

Moreover, since polishing debris is quickly discharged through the notch grooves 4a and 4b, rapid polishing can be performed.

[Brief explanation of drawings]

FIGS. 1 and 2 show a first embodiment of this invention, with FIG. 1 being a vertically sectioned side view and FIG. 2 being a plan view. FIG. 3 shows the cross-sectional shape of each groove of the notched groove in the polishing tool of FIGS. 1 and 2. FIG. 4 and 5 show a second embodiment of this invention, FIG. 4 being a side view cut vertically from FIG. 5, and FIG. 5 being a plan view. 1... Mortar-shaped depression, 2... truncated conical surface, 3...
Outer peripheral surface, 4a, 4b... Notch groove, 5... Corner, 6
... Fine abrasive material, 7 ... Polishing tool, 7a ... Cylindrical part, 7b ... Edge, 7c ... Rod-shaped grip part, 8 ... Swivel handle, 9a, 9b ... Electrode, 10 ... Bolt .

Claims (1)

[Scope of utility model registration request] A truncated cone-shaped mortar-shaped depression 1,1 at both ends of the short cylinder.
In addition, a plurality of notched grooves 4a connecting the truncated conical surface 2 and the outer circumferential surface 3 are provided radially, and at least the corner 5 of the truncated conical surface 2 and the notched groove 4a and the truncated conical surface 2 are provided. A piece-shaped polishing tool 7 is formed by bonding a hard fine-grained abrasive material 6 to the cylindrical part 7a into which the outer peripheral surface 3 of the piece-shaped polishing tool 7 is fitted, and a cylindrical part 7a provided on one end surface of the cylindrical part 7a. Edge 7b toward the center in the radial direction
A turning handle 8 consisting of a rod-shaped grip portion 7c projecting in the diametrical direction of the outer periphery of the cylindrical portion 7a is fitted onto the piece-shaped polishing tool 7, and the polishing tool is tightened from the radially outside to the cylindrical portion 7a. An electrode polishing tool for spot welding, which is formed by screwing in a bolt 10 for spot welding.