JPS63169296A - Tile puncher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for punching tiles such as P tiles (plastic tiles) of a predetermined shape from a punchable sheet or plate-like body.

(Prior Art) In the above-mentioned punching device, a hardened product such as 5KDII, 5KD61, etc. or a cemented carbide has conventionally been used for the cutting edge of the blade that engages with each other.

(Problems to be Solved by the Invention) In this conventional tile punching device, the speed at the time of engagement is increased and the engagement conditions are set strictly in order to prevent chipping of the edge of the tile. Even if a new product or cemented carbide is used, wear progresses in a relatively short period of time, requiring re-grinding of the cutting edge and associated modifications to the assembly within about a week, resulting in a decrease in the operating rate of the equipment. However, there were problems in terms of workability and economy, such as problems with workability and increased maintenance costs.

(Objective of the Invention) The present invention aims to eliminate the above-mentioned problems by significantly improving durability by constructing the cutting edge portion with a cermet composition.

(Means for Solving the Problems) The tile punching device of the present invention for achieving the above object has the following features:
A device for punching tiles using a pair of tools of a predetermined shape that operate in mesh with each other, characterized in that the cutting edge of the blade body constituting the tools is made of a NbC-TiC-TiN based cermet composition. be.

The above cermet composition has a NbC-TiC-TiN ceramic phase (hard phase) of 55 to 95%, Fe, Ni
and ferrous metals such as CO or Cr, M.

and 5 to 45% by weight of a binding metal phase selected from chromium group metals such as W and alloys thereof, preferably 70 to 90% by weight of the former and 10 to 30% by weight of the latter. .

TiC improves the wear resistance of the cermet material, and is preferably contained in an amount of 10 to 40% by weight.

In addition, TiN acts as a grain growth inhibitor for TiC, thereby further improving wear resistance and increasing hardness and
It contributes to the improvement of toughness, and the cermet composition contains 5 to 10
It is desirable to contain it in weight%.

Furthermore, NbC functions to further improve the wear resistance and toughness of the TiC-TiN cermet composition, and is preferably contained in the cermet composition in an amount of 10 to 50% by weight. It is also possible to further improve the toughness by replacing C with TaC.

The ceramic phase may contain other additives such as Mo2C.
By containing , WC, TaN, ZrN, etc.,
Properties can be improved depending on each additive.

In particular, adding 5 to 30% by weight of Mo2C is effective in improving wettability with the bonding metal phase and improving sinterability. I will briefly explain. First, TiC, TiN and NbC (and Ta
When using C, Mo2C, WC, etc., these are also included)
A suitable grinding medium such as acetone is added to a mixed raw material consisting of a ceramic component such as and a metal component for bonding, and the mixture is ground using a vibrating mill. Next, this is dried to remove the solvent and granulated, and then passed through a 50 to 100 mesh sieve to obtain a raw material for molding. After this molding raw material is pressure molded, it is fired at a temperature of 1400 to 1500° C. in a non-oxidizing atmosphere to obtain a sintered body. Thereafter, the sintered body is ground and polished to obtain a cutting edge portion as shown in Examples below.

(Function) The blade edge of the tile punching device of the present invention having the above configuration is made of Nb.
It is made of a CTiC-TiN cermet composition, and its wear resistance and toughness are far superior to conventional hardened metal products or cemented carbide, and its service life is therefore extended several tens of times. In particular, when punching tiles made of relatively hard synthetic resin such as P tiles, in order to prevent the edges of the product from chipping, conventional methods have tightened the meshing conditions and increased the meshing speed, resulting in severe friction and wear between the cutting edges. Moreover, since the edge of the cutting edge itself is sharp, it becomes easily broken, but the cutting edge having the characteristics of the present invention significantly reduces such concerns.

(Example) EXAMPLES The present invention will be explained in further detail with reference to Examples below.

(i) Based on the manufacturing method of the above-mentioned cutting edge part, four types of cutting edge parts were manufactured using the cermet compositions shown in Table 1 below, and these were referred to as Examples 1 to 4, and the three types of cutting edge parts in Table 1 were used as comparative examples. Adopted cemented carbide.

However, in Example 4, 1/2 of the NbC in Example 3 was replaced with T.
It was replaced with aC.

(if) P by the tile punching device using the above cutting edge part.
The procedure for punching tiles will be explained based on the drawings.

FIG. 1 is a longitudinal cross-sectional view of a main part of a tile punching device of the present invention, FIG. 2 is an exploded perspective view of a lower tool of the device, and FIG. 3 is an exploded perspective view of an upper tool of the same device.

As shown in FIG. 1, FIG. 2, and FIG. 3, a glue tile punching device 1 for punching, for example, four square P tiles according to the present invention is fixed horizontally on one machine 10 so that four sets can be replaced. a fixed tool 2, an elevating table 5 which is vertically driven vertically with respect to the machine base 10 by an elevating drive means 3 such as a hydraulic cylinder, and a lifting table 5 that is disposed at the bottom of the elevating table 5 and facing the fixed tool 2. It consists of a lifting tool 6 that is fixed in a removable manner and a means (not shown) for collecting the punched P tiles from the machine base 10, and the P tiles that the worker lays on the machine base 10. Four P tiles are sequentially punched out from a plastic sheet S.

The fixed tool 2 is attached to a blade body 21 which has the same dimensions and shape (square) as the P tile to be manufactured and is framed in an upwardly open state, and to the upper end surfaces 21a of the four sides of the body 21. It consists of four cutting edges 23... The cutting edge 23・
... has cutting edges 20, 20' symmetrically on both sides of the upper surface, a swallowtail-shaped protrusion 24 is formed on the lower surface, and a dovetail groove 22 carved on the upper end surface 21a of the blade body 21 is formed on the blade body 21. The protrusion 24 is inserted from the end along the longitudinal direction and fixed with adhesive. The blade tip portion 23 is the blade body 21
It has a width equivalent to the wall thickness of , and a length that allows it to be fitted in the shape shown in
It is formed from a C-TiN cermet composition. In addition, the fixed tool 2 is provided with a lifting plate 27 elastically supported by a spring 26 in its hollow portion, and the punched P tiles are raised slightly from the upper surface of the machine base 10 so that they can be easily collected by the collecting means. It is about to take place. The fixing tools 2 having the above configuration are assembled into four sets in the recess of the machine base 10 so that the upper surface of the cutting edge part 23 forms the same plane, and the fixing wedge 21b and the tightening tool are pressed against the outer surface of the blade body 21. Fixing bolt 21
c, and are fixed to the machine base 10 in a cross-shaped pattern as shown in FIG.

On the other hand, the lifting tool 6 is attached to the inner edge 2o of the fixed tool 2.
A box-shaped blade body 61 with a downward opening that engages with a very small gap, and a cutting edge 60 similar to the above, which is fitted onto the lower end surface 61a of the blade body 61 through the same dovetail joint as above and fixed with adhesive. A blade edge portion 63 having a diameter of 60′ and a blade body 6
1, and a presser plate 67 suspended from the bottom of 1 via a spring 66. The blade body 61 has basically the same structure as the blade body 21 of the fixed tool, although the dimensions are different, and is fixed by a fixing bolt 50. The holding plate 67 is biased by a relatively strong spring 66, and serves to prevent the inner edge 60' of the cutting edge portion 63 from producing pressure marks on the P tile. Also, the cutting edge part 63
Although the dimensions are different, they have the same structure as the cutting edge portion 23 of the fixture, and are formed from the same NbC-TiC-TiN cermet composition.

Next, to outline the operation of this device, when the operator spreads the plastic sheet S on the machine base 10 and presses the punching operation switch (not shown), hydraulic pressure is supplied to the hydraulic cylinder 3 and the lifting platform 5 The lifting tool 6 is lowered and the tool 6 is lowered.
The outer edge 60 of the cutting edge 63 of the fixed tool 2 and the cutting edge 2 of the fixed tool 2
The P tile is punched out by the engagement of the inner edges 20 of No. 3.

When the lifting platform 5 descends by a predetermined stroke, the hydraulic pressure in the hydraulic cylinder 3 is released and the built-in return spring causes it to return upward, and the punched P tile is pushed up slightly above the plastic sheet S by the push-up plate 27. collected by means of collection means. By repeating the above operations, a large number of P tiles are manufactured.

Regarding the coverage force of the blade edge portion 23.63 to the blade body 21.61, as shown in the illustration, it fits into the four sides of the square opening of the blade body 21.61 from a part of each corner along its longitudinal direction. By doing this, each cutting edge 23.63 can be applied to either side, which is convenient. Also, by forming interlocking cutting edges symmetrically on both sides of each cutting edge 23.63, if one of the cutting edges is damaged, this can be avoided. It is convenient to be able to continue using the device by levering it from side to side. However, it goes without saying that in addition to the dovetail joint described above, various methods such as a combination of positioning using a dowel and fixing using screws can be applied.

(ni) For each sample shown in Table 1, P tiles were punched out of a hard plastic sheet and their service life was measured.

Motakugokumisho hard plastic sheet; wall thickness 2.5+m+, material PP
Engagement speed: 0, 5 m/sec Engagement stroke: 3 nm Engagement gap depth 0.03 mm In addition, the judgment of service life is based on the following criteria: ■ If there is damage such as peeling on the cut end of the P tile, or ■ If there is damage to the cutting edge. This was done depending on the case, etc.

As is clear from Table 2, the number of durable blades of the cutting edge parts of Examples 1 to 4 is overwhelmingly greater than that of the comparative example, which is about 15 times that of conventional cemented carbide blades. It is.

(Effects of the Invention) As described above, the tile punching device of the present invention has excellent wear resistance, toughness, etc. because its cutting edge is made of a N b C-T i C-T i N-based cermet composition. It is extremely superior in terms of performance, its service life has been dramatically extended compared to conventional ones, and the operating rate of this device has been greatly improved.Furthermore, the product has a good finish, and it far exceeds conventional ones in terms of economy and workability. Yes, and its usefulness is extremely great.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part of a tile punching device of the present invention, FIG. 2 is an exploded perspective view of a lower tool of the device, and FIG. 3 is an exploded perspective view of an upper tool of the same device. (Explanation of symbols) 1... Tile punching device, 2... Fixed tool, 6...
・Lifting tool, 21.61...Blade body, 23.63...
・Blade tip. one or more one

Claims (1)

[Scope of Claims] 1. A device for punching tiles using a pair of tools having a predetermined shape that operate in mesh with each other, wherein the cutting edge of the blade body constituting the tools is made of a NbC-TiC-TiN cermet composition. A tile punching device characterized by: 2. The cermet composition is NbC-TiC-TiN
2. The device according to claim 1, comprising a hard phase and a binding metal phase selected from ferrous metals, chromium metals, or alloys thereof.