JPH0739497Y2 - Cutter of tip dresser for welding gun - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter of a tip dresser for a welding gun for polishing a tip used for spot welding.

[0002]

2. Description of the Related Art Tips used for spot welding require periodic cleaning and polishing of deposits such as alloys deposited on the surface thereof. Recently, as a device therefor, an automatic grinding type electrode polishing device has come to be used instead of a conventional grinding means such as a file, and various cutters for tip dressers for welding guns mounted on the polishing device are also proposed. (See, for example, Japanese Utility Model Publication No. 1-118885 and Japanese Utility Model Publication No. 1-143688).

However, since the conventional cutter of this kind of welding gun tip dresser uses a complex-shaped cutter having a plurality of cross-shaped cutting surfaces made of an integrally molded product, it is used for processing this cutter member. There is a problem in that it requires a lot of labor and becomes extremely expensive, and even if only a part of the edge portion or the like is damaged, the whole cannot be used.
On the other hand, it has been proposed that a plurality of relatively simple cutter pieces are installed in the cutter case to improve the workability and replaceability of the cutter and reduce the cost. There is a problem that the replacement work is complicated and takes a long time, and it is difficult to center each cutter piece and it is not possible to grind it accurately.

[0004]

It is needless to say that the present invention solves the above-mentioned conventional problems and has a cutting surface corresponding to the outer shape of the chip and can perform extremely highly accurate grinding. It is composed of multiple cutter pieces, has excellent workability, and even if damage occurs, it is economical to replace only that part, and it is easy to perform assembly work and replacement work. The present invention has been completed for the purpose of providing a cutter for a tip dresser for a welding gun, which is capable of easily and accurately centering a cutter piece.

[0005]

The cutter of the tip dresser for a welding gun according to the present invention, which has been made to solve the above-mentioned problems, has a plurality of blades gradually protruding toward the outer edge on the surface of the disk-shaped base portion. A body is provided to project radially, and the base portion is provided with a pair of left and right fan-shaped first and second divided bodies and the first and second divided bodies.
It is composed of three divided bodies consisting of a central divided body sandwiched between divided bodies, an auxiliary blade body for chip tip grinding is provided at the central portion of the central divided body, and grinding scraps are provided at a part of the base portion. It is characterized in that a sweep-out portion for letting the air out is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. In the figure, 1 is a disk-shaped base portion, 2 is a blade body provided on the surface of the base portion 1, and the blade body 2 is radially projected so as to gradually rise toward the outer edge of the base portion 1. There is.
In addition, as shown in FIG. 2, the base portion 1 includes a pair of left and right fan-shaped first divided bodies 1a and 1b, and a center sandwiched between the first divided body 1a and the first divided body 1b. It is composed of three divided bodies, which are the divided bodies 1c. In addition, the peripheral wall of the base portion 1 is provided with a concave portion 3 for positioning when the rotary block of the electrode polishing apparatus is mounted, as will be described later, and a groove portion 4 for fitting to be fitted with the center pin on the bottom surface. Is provided.

An auxiliary blade body 5 for grinding the tip of the tip is provided in the central portion of the central division body 1c, and a notch-shaped sweep-out for releasing grinding dust is provided in a part of the base portion thereof. A section 6 is provided. In addition, in the embodiment, the auxiliary blade body 5 and the radial blade body 2 are provided in a projecting manner in series on the base, and the adjacent blade of the auxiliary blade body 5 serves as the sweep-out portion 6 with the base cut out. The blade body 2, the auxiliary blade body 5, and the sweep-out portion 6 form one set, and two sets are formed in point symmetry. The auxiliary blade body 5 is horizontally provided at a position slightly lower than the base portion of the blade body 2, and is configured so that grinding can be performed with a navel attached to a tip portion, which is a so-called pimple-type tip. ing.

[0008]

In the structure thus constructed, as shown in FIG. 3, the rotary block 10 is rotated by rotating a driven sprocket wheel connected to a drive source (not shown) by a chain or the like, and the rotary block 10 is rotated. The point is that the tip 20 for the welding gun, which is the object to be ground, is set in the cutter attached to the machine, or is set directly on the sprocket wheel to grind and polish the outer surface. Similarly, the blade body 2 is radially provided on the cutter so that the tip 20
Can be precisely ground into a predetermined shape, and even though the cutter is composed of three divided bodies, the positioning recess 3 can be simply engaged with the projection 11 of the rotary block 10. The state of being fixedly integrated and accurately centered is maintained. Further, since the auxiliary blade body 5 for grinding the tip of the tip is provided at the center of the central divided body 1c, the tip of the tip 20 can be precisely ground and can be always ground into a constant shape. In particular, when the auxiliary blade body 5 is provided at a position slightly lower than the base portion of the blade body 2 as in the embodiment, accurate grinding is performed with the navel attached to the tip portion, so-called pimple-type tip. It will be possible. Further, since the shavings during grinding are smoothly discharged from the notched sweep-out portion 6 provided in a part of the base portion of the central divided body 1c, there is no obstacle to the grinding process. If blade surfaces are formed on both the upper and lower surfaces through the center pin 12 or the like as required, as in the embodiment, 2
It is also possible to polish individual chips 20 at the same time, and since the cutter is composed of three divided bodies, its assembly or disassembly can be performed extremely easily and in a short time, and part of the chips can be damaged. Even in such a case, only the relevant part needs to be replaced, and the efficiency and economical efficiency of the polishing work can be greatly improved.

[0009]

As is apparent from the above description, the present invention has a cutting surface corresponding to the outer shape of the tip and can perform extremely highly accurate grinding, and of course it is composed of a plurality of cutter pieces. It has excellent workability, and even if it breaks, it is economical because only that part can be replaced. Furthermore, assembly work and replacement work can be performed easily and centering of the cutter piece is possible. Is also something that can be done easily and accurately. Therefore, the present invention has an extremely great practical value as a cutter for a tip dresser for a welding gun that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of the present invention.

FIG. 3 is a sectional view showing a usage state of the embodiment of the present invention.

[Explanation of symbols]

 1 Base part 1a 1st division body 1b 2nd division body 1c 3rd division body 2 Blade body 5 Auxiliary blade body 6 Sweeping part

Claims (1)

[Scope of utility model registration request] 1. A plurality of blades (2) gradually protruding toward the outer edge are radially provided on the surface of the disk-shaped base portion (1), and the base portion is provided with a pair of left and right fan-shaped first, Two-part body (1
a), (1b) and the first and second divided bodies (1a), (1b) sandwiched between the central divided body (1c) composed of three divided body, the central portion of the central divided body (1c) Is an auxiliary blade for tip grinding
A cutter for a tip dresser for a welding gun, characterized in that (5) is provided, and a sweeping section (6) is provided in a part of the base part for letting out grinding dust.