RU2562566C2 - Vacuum ion-plasma coating application plant - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and can be used for surface hardening of tools with sizes larger than those of the plant working chamber. Proposed plant comprises chamber, cathode units, water cooling system, vacuum system and workpiece spinning drive. It is provided with cylinder arranged at the front panel to extend said chamber, fasteners insulated from said chamber by ceramic sleeves and designed to set machined part horizontally. Besides, it includes locating clamp to be fitted at the workpiece and to engage with spinning drive equipped with the shaft to spin the workpiece. There are an insulated current feed conductor to transmit voltage from said shaft to workpiece and adapter flanges for turnover of cathode units.

EFFECT: expanded range of processed parts.

5 dwg

Description

The invention relates primarily to mechanical engineering and can be used for ion-plasma hardening of a tool with dimensions exceeding the dimensions of the working chamber of the installation, while maintaining the possibility of hardening small items.

A known installation for complex ion-plasma treatment, which contains a vacuum chamber, an electric arc source of plasma in the form located in the vacuum chamber, at least one long electrode, the holder of products with an insulated current supply, an electron emitter made in the form of an emission chamber, inside of which is installed a long linear cathode of an electron emitter in communication with a vacuum chamber through a perforated partition, the openings of which are located along the longitudinal axis of the cathode cathode (RF Patent N 2453629, IPC С23С 14/30, priority from 06/15/2010, publ. 20.06.2012).

However, the known installation has significant dimensions, poorly adapted for hardening small-sized products.

The serial installation of vacuum ion-plasma spraying NNV-6.6-I1 is also known. . Instruction manual. Date of publication: 08.1985.), Which is adopted as a prototype.

However, the known installation, adopted as a prototype, does not allow to strengthen lengthy products with dimensions exceeding the dimensions of the working chamber.

The technical problem to be solved by the claimed invention is directed is the expansion of the range of hardened parts in serial ion-plasma installations of the NNV type.

The stated technical problem is solved in that the installation for ion-plasma spraying NNV-6.6-I1, which consists of a body, a door, an electric arc evaporator, a water cooling system, a vacuum system, a rotation mechanism, a base and an electrical part, according to the proposed invention is equipped with a mounted on the front panels with a cylinder extending the chamber, fastening devices, current-insulated from the chamber by means of ceramic bushings and intended for horizontal placement of the hardened product, installed nym clamp adapted to be mounted on a reinforcement product and meshing with the rotation mechanism having a shaft transmitting the rotation of the reinforcing article insulated current supply voltage for the transmission of said shaft for hardening product, as well as transient flanges for rotation cathode units.

The technical result consists in expanding the range of hardened products in ion-plasma installations.

This design allows you to harden long products, such as broaches, in ion-plasma installations with a chamber dimension smaller than the size of the hardened product while maintaining the possibility of hardening of small products.

In FIG. 1 shows the proposed installation diagram. Instead of the cathode assembly, an extension cylinder 2 with an inspection window 3 is mounted on the chamber 1. A reinforced long-length product 4 can be horizontally mounted in the chamber using fastening devices 5 and 6 in such a way that it can rotate freely on bearings around its longitudinal axis. A clamp 7 is installed on the working part of the hardened product using the set screws 8. When rotating the shaft 10

the mechanism 11 is engaged with the set screws 8, leading to the rotation of the hardened product. Using an isolated current supply 12, the voltage from the shaft 10 is transmitted to the hardened product. The cathode nodes 9 are deployed using transition flanges (Fig. 4) so that the plasma flows are evenly distributed over the hardened surface.

The fastening device (Fig. 2) for fixing the product in the chamber is a bearing 13, which is mounted in the ring 14 using the set screws 15. The studs are screwed into the ring 16. The position of the ceramic sleeve 18 is adjusted using the nut 17, thereby achieving a tight installation and isolation of the structure from the walls of the chamber.

The mounting clamp (Fig. 3) is a ring 20 with set screws 19, tightly fixing the clamp on the surface of the hardened product.

Installation works as follows. On the hardenable product, the fixing clamp 7 is fixed with screws 8, and the clamp is located as close to the edge of the product as possible. The hardened long product is placed in the chamber 1 in such a way that its end parts are located in the extension cylinder 2 and the nozzle of the vacuum pump. Then the product is fixed using two special clamps with bearings 6 and 7, current-insulated from the walls of the working chamber. The working chamber is evacuated and the shaft 10 is activated with a mechanism 11, which engages with the set screws 8 and transmits rotation to the hardened product. Using a current supply 12, voltage is applied to the product and the coating is sprayed. Thus, uniform coating is achieved over the entire cutting surface of the hardenable product, with the exception of its end elements that do not require hardening.

The proposed installation was hardened

lengthy broaches with a length of 1500 mm (working part 950 mm), the results obtained (Fig. 5) indicate that the coating thickness on the calibrating teeth does not exceed the accuracy tolerance limit (2 μm), while a coating of sufficient thickness is synthesized on the working teeth (4 microns).

The proposed device allows to strengthen long products with dimensions exceeding the dimensions of the working chamber of the ion-plasma installation; can be made using means known in the art. Therefore, the proposed device has industrial applicability.

The use of the proposed device leads to the expansion of the range of hardened parts in serial ion-plasma installations.

Claims (1)

Installation for vacuum ion-plasma coating containing a chamber, cathode assemblies, a vacuum system, a water cooling system and a rotation mechanism of a workpiece, characterized in that it is equipped with a cylinder mounted on the front panel that extends the chamber, fasteners, which are insulated from the chamber by ceramic bushings and designed for horizontal placement of the workpiece, mounting clamp, made with the possibility of installation on the product and engaged e with a rotation mechanism having a shaft transmitting rotation of the product, an insulated current lead for transmitting voltage from said shaft to the workpiece, as well as adapter flanges for turning the cathode assemblies.

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