JPH04336970A - Manufacture of carbide abrasive grain edger - Google Patents

Abstract

PURPOSE:To enable abrasive grains mixedly contained in a metal bond layer to be uniformly distributed, and also to be constant in density in a carbide abrasive grain edger which is used as a truer truing a grinding wheel for grinding works or as a grinding stone. CONSTITUTION:The manufacture of a carbide abrasive grain edger consists of a process in which holes 11 each of which is roughly equal in diameter to each abrasive grain 5, are provided for the surface of a circular electro-deposition plate 10 made of same material as that of metal bond while being processed in a specified pattern, and carbide abrasive grains are disposed in these holes 11 so as to be electrically deposited, and of a process in which the electro-deposition plate 10 is then sintered together with metal powder by the use of a metal mold.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a super hard abrasive grain roll used as a truing tool for a grinding wheel of a grinding machine or as the grinding wheel.

0002

[Prior Art] Conventionally, a method for manufacturing a grinding wheel for grinding or grinding using ultra-hard abrasive grains such as diamond or cubic boron nitride (CBN) has been carried out using an annular ring formed in a mold 1, as shown in FIG. The steel core 3 is loaded into the mold 1 so that the outer periphery of the steel core 3 corresponds to the inner periphery of the concave groove 2, and a mixed powder 6 of metal powder such as tin and copper and ultra-hard abrasive grains 5 is mixed into the mold 1. The metal powder is filled into the concave groove 2 and pressed by a press die 4, and then sintered and solidified by firing, hot coining, or hot pressing to form the metal powder, as shown in FIG. Hard abrasive grain 5
The metal bond layer 7 is formed with a mixture of .

0003

[Problems to be Solved by the Invention] However, in the products manufactured by the above-mentioned conventional method, the distribution of the ultra-hard abrasive grains 5 mixed in the metal bond layer 7 is not uniform and is arranged randomly, as shown in FIG. It is formed with uneven distribution and irregular density. Therefore, the grinding wheel for grinding that is trued with such a truer may cause feed marks, and the dressing interval may become unstable, the grinding resistance may become unstable, and grinding burn, cracks, etc. may occur. . Furthermore, there are various problems such as the work being ground into a taper or an ellipse, resulting in poor cylindrical and roundness accuracy and deteriorating the quality of the ground surface.

0004

[Means for Solving the Problems] The present invention is a method for manufacturing an ultra-hard abrasive roll that has been devised to solve the above-mentioned conventional problems. A process of arranging holes with approximately the same diameter in a required pattern, placing ultra-hard abrasive grains in these holes and electrodepositing them, and a process of sintering this electrodeposited plate together with metal powder in a mold. It consists of

[0005]

[Function] The super hard abrasive grain roll manufactured by the above method has a uniform arrangement distribution of the super hard abrasive grains by aligning the super hard abrasive grains in the holes formed in the electrodeposited plate and electrodepositing them. Moreover, a metal bond layer arranged at a constant density can be obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. The method for manufacturing an ultra-hard abrasive roll according to the present invention can be broadly divided into two steps. That is, in the first step, as shown in FIG. 1, ultra-hard abrasive grains 5 such as diamond or CBN are placed in holes 11 arranged in a desired pattern on the surface of an annular electrodeposited plate 10. and electrodeposit it.

[0007] This first step will be explained in detail. The electrodeposited plate 10 is made of the same material as the abrasive bond metal bond, and the holes 11 formed therein are processed by laser or etching. This hole 11 may have either a conical shape as shown in FIG. 3 or a straight cylindrical shape as shown in FIG.
In the case of a conical shape, the maximum diameter of its opening end is approximately the same as the particle diameter of the abrasive grains 5. Further, the depth of the holes 11 is determined so that excess abrasive grains are not electrodeposited (plated) on the electrodeposition plate 10 during electrodeposition.

The abrasive grains 5 are sprinkled on the plate surface of the electrodeposited plate 10, and the abrasive grains 5 in the holes 11 are electrolyzed by the plating part 12 in a copper, nickel, or cobalt bath as shown in FIG. Temporarily attach it to the mounting plate 10. After this temporary attachment, excess abrasive grains 5a are washed with water and piled up on the abrasive grains 5 temporarily attached to the holes 11 of the electrodeposition plate 10.
Rinse off, and then proceed with actual plating in a plating tank. this is,
In the temporary attachment state, the electrodeposited plate 10 is attached to the mold for the next sintering process.
Since there is a risk that the abrasive grains 5 may fall off during handling operations such as when loading, it is better to strongly electrodeposit the abrasive grains 5 in the holes 11 by main plating to ensure that the abrasive grains 5 are fixed. It is from. Incidentally, when the electrodeposition plate 10 can be carefully loaded into the mold, the main plating may be omitted.

In the second step, metal powder is filled into the annular groove 2 of the mold 1 shown in FIG. An electrodeposited plate 10 having electrodeposited No. 5 is placed thereon, and further, metal powder is filled on the electrodeposition plate 10 and solidified by pressing with a press mold 4, and then sintered and solidified by firing, that is, hot coining or hot pressing. A metal bond layer is used.

The abrasive grains 5 of the metal bond layer manufactured by the above method have a structure in which the abrasive grains are arranged with a constant density and uniform distribution based on the required pattern of the holes 11 of the electrodeposited plate 10, In addition, since the grain size of the abrasive grains 5 is determined by the holes 11, the grain size is approximately constant. Note that the present invention is applicable not only to the production of grindstones for grinding workpieces, but also to the production of grindstones for grinding workpieces.

[0011]

As described above, according to the present invention, holes having approximately the same diameter as the abrasive grains are arranged on the surface of the annular electrodeposited plate in a desired pattern, and ultra-hard abrasive grains are inserted into the holes. The process of arranging and electrodepositing the plate and sintering the electrodeposited plate together with metal powder in a mold ensures uniform distribution of the abrasive grains and allows the abrasive grains to be arranged at an arbitrary constant density. The ultra-hard abrasive roll can be easily manufactured and mass-produced, and solves the problems of true grinding wheels or cutting wheels manufactured by conventional manufacturing methods.

[0012] Furthermore, by electrodepositing abrasive grains in a desired pattern arrangement into the holes provided in the electrodeposition plate, it is easy to remove excess abrasive grains that are not in the holes, which has the advantage of improving work efficiency. ing.

[Brief explanation of drawings]

[Figure 1] Plan view of electrodeposition plate

[Figure 2] Cross-sectional view of electrodeposition plate

[Figure 3] Enlarged sectional view of part A in Figure 2

[Fig. 4] A sectional view of section A in Fig. 2 showing another modification example.

[Fig. 5] Explanatory diagram of the conventional manufacturing method

[Figure 6] Cross-sectional view of essential parts of a super hard abrasive roll manufactured by a conventional method

[Figure 7] Diagram showing the abrasive grain distribution state of a super hard abrasive roll manufactured by a conventional method

[Explanation of symbols]

1 Mold 2　Annular groove 3 Steel core 4　Press mold 5 Abrasive grains 10 Electroplated plate 11 Hole 12 Plated part

Claims (1)

[Claims] 1. A step of arranging holes with approximately the same diameter as the abrasive grains in a desired pattern on the plate surface of an annular electrodeposited plate, and arranging and electrodepositing ultra-hard abrasive grains in the holes. A method for manufacturing an ultra-hard abrasive roll comprising the steps of: sintering the electrodeposited plate together with metal powder in a mold.