JPH0679594A - Jig grind processing method for metal mold plate - Google Patents

Abstract

PURPOSE:To remove grinding heat quickly and efficiently, by arranging metal plates which are superior in their heat conductivity on a part to be processed, of a metal mold plate, and performing jig grind processing while forcibly cooling these metal plates. CONSTITUTION:Jig grind processing is applied on a metal old plate 1 such as a punch plate or a die plate, without using grinding lubricant. On a part, to be processed, of the metal mold plate 1, metal plates 6 which are superior in heat conductivity are arranged. A flexible hose (metal tube) is connected to these metal plates 6. Grinding heat generated by the jig grind processing is locally concentrated by these metal plates 6, and the metal mold plate 1 is cooled through natural heat radiation from the metal plates 6 and forced cooling performed by water flowing in the flexible hose 3. Consequently, grinding heat can be removed quickly and efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig-grinding method for a die plate, and more particularly, to a jig-grinding method for a die plate in which the grinding heat generated by the grinding operation is quickly removed to improve the plate machining accuracy. Regarding processing method.

[0002]

2. Description of the Related Art A die plate such as a punch plate and a die plate is provided with holes of a predetermined shape for arranging dies such as punches and dies, and for incorporating guide posts and knock pins. The formation of this hole is generally performed by a jig grinding apparatus, and a grindstone with a shaft attached to the tip of a grinding head is rotated at a high speed of 9000 to 60,000 rpm to scrape the metal from the metal surface for processing.

However, when the holes of the die plate are formed by grinding, grinding heat is generated near the processed portion. This grinding heat causes expansion in the length direction of the plate in the process of diffusing over the entire plate, which causes the pitch accuracy of the holes to be reduced.

Conventionally, in order to solve the problem of the grinding heat, for example, a grinding method as shown in FIG. 2 has been adopted. That is, in FIG. 2, the grinding process of the mold plate 1 is sequentially performed by the grindstone 4 with a shaft of the grinding head 5,
The copper plate 6 is placed on the upper part of the processed hole 7 formed by the grinding process in the order of processing. In this way, the grinding heat generated in the vicinity of the processed hole 7 can be radiated from the copper plate 6 and removed.

[0005]

However, according to the conventional method of jig-grinding a die plate, since the grinding heat is removed only by natural heat dissipation of the copper plate, the exhaust heat efficiency is low and the plate temperature is low. The lower the temperature difference from the outside air becomes, the more remarkable it becomes. Therefore, it takes a considerable amount of time to completely remove the grinding heat, and the plate processing accuracy cannot be improved. In addition, the area of the copper plate must be increased to obtain a sufficient heat removal effect.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a jig plate grinding method for a die plate which can quickly remove the grinding heat and improve the plate processing accuracy.

[0007]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a metal having excellent thermal conductivity in a processed portion of a mold plate in order to quickly remove grinding heat and improve the processing accuracy of the plate. Disclosed is a jig grinding method for a die plate, in which the plates are arranged and the jig is ground after the metal plate is forcibly cooled.

The jig grinding process can be performed, for example, through a hole formed in a metal plate. As the metal plate, a material having excellent heat conductivity, such as copper or aluminum, can be used. The forced cooling of the metal plate is performed by connecting a heat transfer tube such as a metal tube to the metal plate and supplying a cooling medium such as water to the heat transfer tube.

[0009]

The operation of the die plate grinding method of the mold plate of the present invention is as follows.
The metal plate is locally concentrated by the metal plate with excellent heat transfer property, and the natural heat from it and the forced cooling (heat sink) are performed by supplying water into the pipe. To cool. Therefore, the grinding heat can be removed promptly and efficiently.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A jig plate grinding method according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a jig grinding apparatus according to an embodiment of the present invention. This processing apparatus includes a mold plate 1 placed on a table (not shown), a grindstone 4 with a shaft for performing a jig grinding process on a predetermined portion of the mold plate 1,
It is composed of a grinding head 5 for rotating a whetstone 4 with a shaft, a copper plate 6 arranged on a processed portion of a mold plate 1, and a flexible hose 3 for forcibly cooling the copper plate 6.

The copper plate 6 is formed with a hole 2 for allowing the grindstone 4 with a shaft to enter the surface of the mold plate 1 and a groove for accommodating the flexible hose 3 on the outer side thereof. Moreover, you may use an aluminum plate instead of a copper plate. Further, a copper plate 6 having no holes 2 may be used, and the metal plate 1 and the copper plate 6 may be ground at the same time.

The flexible hose 3 is made of a copper pipe having a good heat exchange property with the copper plates 6, and is configured so that water is circulated between the copper plates 6 by supplying water to the inside. Further, a cooling medium other than water may be supplied to the flexible hose 3.

The jig grinding method for the mold plate of the present invention will be described below. First, the mold plate 1 is placed on the table. Then, the copper plate 6 having the hole 2 is arranged on the processed portion of the mold plate 1, and the flexible hose 3 is connected to the groove of the copper plate 6.

When the preparation for processing is completed in this way, the water inside the flexible hoe 3 is circulated, and the grindstone 4 with a shaft of the grinding head 5 is passed through the hole 2 of the copper plate 6 to the surface of the mold plate 1. After that, the jig plate 1 is subjected to jig grinding.

When the jig plate 1 is subjected to jig grinding,
Grinding heat is generated in the mold plate 1 in the vicinity of the processed portion, and this grinding heat is placed on the copper plate 6 having excellent thermal conductivity.
Be transmitted to. The grinding heat transmitted to the copper plate 6 is removed by heat radiation to the outside air and forced cooling of the water supplied to the flexible hose 3. Further, hot air is generated between the metal plate 1 and the processed portion, but this hot air is discharged from the hole 2 of the copper plate 6.

As described above, the grinding heat generated in the vicinity of the machined portion by the jig grinding process performs natural cooling and forced cooling in parallel by heat exchange between the copper plate arranged above the machined portion and the outside air and water. I am trying to remove it. Therefore, the grinding heat can be removed promptly and efficiently.
Further, as described above, since the holes are formed in the copper plate, the hot air generated between the copper plate and the processed portion can be discharged therefrom, and the removal effect can be further enhanced.

[0018]

As described above, according to the jig grinding method for a mold plate of the present invention, a metal plate having excellent thermal conductivity is arranged on the processed portion of the mold plate, and the metal plate is used. Since the jig grinding process is performed without being forcibly cooled, the grinding heat can be quickly removed to improve the plate processing accuracy.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a conventional jig grinding method for a mold plate.

[Explanation of symbols]

1 Mold plate 2 Hole 3 Flexible hose 4 Grinding stone with shaft 5 Grinding head 6 Copper plate 7 Processing part

Claims (2)

[Claims] 1. A jig plate grinding method for performing jig grinding on a die plate such as a punch plate or a die plate without using a grinding liquid, wherein heat conduction is performed to a processed portion of the die plate. A jig grinding method for a die plate, which comprises arranging a metal plate having excellent properties and performing the jig grinding process without forcibly cooling the metal plate. 2. The jig grinding process is performed through a hole formed in the metal plate, and the metal plate is forcibly cooled by connecting a heat transfer pipe such as a metal pipe to the metal plate. The jig grinding method for a mold plate according to claim 1, wherein a cooling medium such as water is supplied to the heat pipe.