KR19990030861A - Coating equipment for double-sided cutting tool - Google Patents

Abstract

The present invention relates to a coating apparatus for coating a Ti-based compound on a cemented carbide cutting tool (for example, an insert), and improves the jig supporting the product at the time of coating to simultaneously cut both sides (top and bottom) of the cutting tool. It is to provide a device that can be coated with a uniform thickness.

The present invention is a plurality of elastic rods are installed in the reactor to secure a plurality of supports (8) to the supporting disk (6) to orbit and rotate about the evaporation source (2) and having a bent portion (9a) on each support (9) is a coating apparatus for a double-sided cutting tool that fixes adjacent bending portions to face each other so that the cutting tool can be sandwiched between the opposite bending portions.

Description

Coating equipment for double-sided cutting tool

The present invention relates to a coating apparatus for coating a Ti-based compound on a carbide cutting tool (insert), in particular to improve the jig to support the product during coating to coat both sides of the cutting tool at once. .

In general, cutting tools are coated by a dry method, and chemical vapor deposition and physical vapor deposition are used as coating methods.

Among the above methods, chemical vapor deposition is a method in which coating is performed by chemical reaction of gases, so that the supporting structure of the product by the jig is relatively simple and the shape of the jig is simple.

However, in the case of the physical vapor deposition method, the deposition material is coated on the product by the flow of particles evaporated from the evaporation source in a certain position to the product, so that the uniformity of the coating depends on the position of the product in the coating reactor. It is difficult to obtain, and there is a possibility that the coating may be uneven in parts (center, edge, corner, etc.) even in one product.

Therefore, in the physical vapor deposition method, the design of the jig that supports the product in the reaction furnace during coating is very important, and by ensuring the proper design of the jig can ensure the maximum coating uniformity.

As a requirement of the coating jig, the jig should not interfere with the flow of the deposition material, the jig should be minimized in the product, the deposition material must be uniformly coated on the product when the above requirement is satisfied.

In addition, the jig must be rotated and orbited about the evaporation source, and the jig must be designed in various ways according to the shape of the product because the above requirements must be met for various shaped products.

1 and 2 illustrate a coating apparatus for a cutting tool by physical vapor deposition, which is generally used in the related art.

An evaporation source 2 is provided at one side in the reactor 1, and a central axis 4 for rotating the driving force of the motor 3 is provided at the center.

A plurality of outer shafts 5 are arranged concentrically on the periphery of the central shaft 4 and connected to the central shaft, and the outer shaft 5 is installed to be rotatable by itself.

Accordingly, when the motor 3 is driven, the central axis 4 rotates, and the outer axis 5 rotates and rotates about the central axis.

A plurality of support discs 6 are provided on the outer shaft 5, and the cutting tool 7 is supported on the support discs 6.

Therefore, the cutting tool mounted on the support plate 6 during the coating is rotated and orbited about the evaporation source 2 and the deposition material evaporated from the evaporation source is coated on the product.

However, in the conventional apparatus described above, in the case of a cutting tool using only one side, since one side (bottom side in the drawing) is not used, there is no problem even if the cutting tool is placed on the base plate and coated. When coating a cutting tool that uses all of the various problems arise.

That is, in the conventional apparatus as described above, the coating layer is not properly deposited on the lower surface of the cutting tool during coating or the thickness of the coating side is formed to be thin so that a difference in coating thickness occurs between the upper surface and the lower surface, thus coating the upper and lower surfaces of the cutting tool. In order to maintain the uniformity of the thickness, after the first coating process, the cutting tool is turned upside down and the second coating is performed. In this case, the coating cost is increased and the coating process is increased.

In addition, the lower surface of the cutting tool in contact with the base plate 6 of the jig may generate an arc under the influence of the bias applied during the coating process, thereby causing damage to the cutting edge of the cutting tool.

An object of the present invention is to provide an apparatus capable of coating both sides of a cutting tool with a uniform thickness at one time when coating a cutting tool using both sides.

In accordance with an embodiment of the present invention for achieving the above object, a plurality of vertical supports are fixed on the support disk to rotate and rotate about the evaporation source in the reactor and bend a pair of elastic rods having a bent on each support. Provided is a coating apparatus for a double-sided cutting tool configured to be fixed to face each other so as to support the cutting tool between opposite bent portions.

1 is a cross-sectional view showing a conventional coating device

2 is a perspective view of a rotating plate applied to the cooling device

3 is a cross-sectional view of the coating apparatus according to the present invention

Figure 4 is a perspective view of the support applied to the device of the present invention

Explanation of symbols for main parts of the drawings

1 reactor 2 evaporation source

4: center axis 5: outer axis

6: supporting disc 7: cutting tool

8: support stand 9: elastic bar

9a: bend

Figure 3 is a perspective view of the coating apparatus according to the invention, Figure 4 is a perspective view of the support applied to the apparatus of the present invention.

A plurality of outer shafts 5 connected to the central shaft 4 rotated by the motor 3 in the reactor 1 and the central shaft and rotating while rotating according to the rotation of the central shaft, and a plurality of outer shafts installed on the outer shaft. The structure of the four support discs 6 is the same as that of the conventional apparatus.

A plurality of supports 8 are fixed to the support disc 6, and a plurality of elastic rods 9 are fixed to each support 8 arranged side by side.

Each of the elastic rods 9 has a bent portion 9a having a curved shape, and the bent portions 9a are arranged such that adjacent pairs face each other.

Therefore, the cutting tool 7 can be held between the bent portions 9a of the elastic bars 9 facing each other.

In addition, the elastic rod (9) is made of a spring steel wire material, the diameter of which is formed from 0.8 to 1.5mm, if the diameter of the spring steel wire is less than 0.8mm, the supporting force of the cutting tool is weak and the cutting tool during the coating operation It becomes impossible to fully support it, and when it is 1.6 mm or more, the part covered by the elastic rod at the time of coating deposition increases.

Since the bent portions 9a are formed to face each other on the elastic rods 9 fixed to the supporting disc 6, the apparatus of the present invention as described above slightly lifts the elastic rods 9 and each bent portion 9a. After placing the cutting tool (7) between the () and then lifted up the elastic rod to support the cutting tool so that the bent portion (9a) of the elastic rod (9) is in close contact with the cutting tool by its own restoring force.

When the motor 3 is driven while the cutting tool is supported by the elastic rod as described above, the outer shaft 5 and the support disk 6 are rotated and rotated about the evaporation source 2 by the rotation of the central shaft 4. Since the two sides (top and bottom) of the cutting tool supported by the elastic rod (9) is coated with a uniform thickness at the same time.

After the coating of the cutting tool is completed, the elastic rod 9 may be lifted slightly as described above, and the cutting tool may be easily pulled out between the elastic rods.

As described above, according to the present invention, both sides of the cutting tool can be coated at the same time with a uniform thickness, which brings about a shortening of the process compared to the conventional apparatus for coating the upper and lower surfaces of the cutting tool in separate processes. Compared with the conventional apparatus for simply laying on a base plate and coating, the amount of cutting tool is increased in one coating, thereby greatly reducing the coating cost.

Claims (3)

In the reactor 1, a rotatable central shaft 4 and a plurality of outer shafts 5 connected to the central shaft to rotate while rotating are installed, and a supporting disk 6 is installed on the outer shaft in multiple stages. In a coating apparatus for a cutting tool configured to rotate and rotate about an evaporation source 2 in the reactor, a plurality of pairs having a plurality of vertical supports 8 fixed to the support discs and having bent portions 9a on each support. Fixing the elastic bar (9) of the bent parts so as to be opposed to each other, the coating device of the two-sided cutting tool, characterized in that the cutting tool can be sandwiched between the opposite bent portions. The method of claim 1, The elastic rod is a coating device for double-sided cutting tool made of spring steel The method of claim 1, The elastic rod is a coating device for double-sided cutting tool having a diameter of 0.8 ~ 1.5㎜.