CS251986B1 - Method of high-tension composite clamp production and equipment for realization of this method - Google Patents

Abstract

The solution relates to a high-voltage process clamps and equipment for its implementation. The essence of the method of making the composite] clamps, consisting of an outer aluminum body clamps and inner brown The tube is that of the inner copper the tube is subjected to radial pressure as a creep of bound material and less than the bond strength material. The essence of the device to implement the consisting of a punch, pressing thatch, thatch and sleeve, is that the punch has a leading and calibration portion the gut shape, with the calibration part having diameter of 0.5 to 3 mm higher than leading a portion having a tapered leading edge o 30 ° to 45 °. In the motherboard and in the thrust the board is the stock of excess material Forming. The solution can be used in composite production of high-voltage terminals in welding two different materials cold pressure.

Description

The present invention relates to a method for manufacturing a high-voltage composite clamp and a device for its implementation.

At present, the engineering technologies are looking for a variety of high voltage copper terminal manufacturing solutions, which are used in high voltage substations and have so far been produced by casting the entire terminal body from the medium.

In order to save expensive and deficient non-ferrous metal, the cast copper body of the clamp was replaced with clay, and a copper pipe was used at the connection point of the conductor to the clamp body. Recently, a variety of forming technologies have been used to connect the tube to the clamp body by mechanical molding, using rubber, the aluminum-tube interface being embossed or, in special technologies, by explosion welding. The hitherto mechanical press-in process did not rule out the adverse consequences that such a connection could leave. The processes relating to the production of these high-voltage composite clamps are not yet satisfactorily addressed in the molding.

These drawbacks are eliminated by a method of manufacturing a high-voltage composite clamp consisting of an aluminum outer clamp body and an inner copper tube by cold pressure welding, which is based on the fact that the inner copper tube is subjected to radial pressure greater than the creep limit of the material to be bonded. the strength of the material to be joined.

The apparatus for carrying out the method of the invention consists of a punch, a pressure thatch, a base thatch and a sleeve, and the essence is that the punch consists of a leading part of a spherical shape, a calibration section of a spherical shape. greater than the diameter of the leading-in part. The leading part has a chamfered edge of 30 ° to 45 ° at the periphery of the leading surface, furthermore at least one material container is formed in the base plate and at least one material container is formed in the pressure plate, the base plate being connected to the pressure plate by a sleeve.

Claims (3)

A method of manufacturing a high voltage composite clamp comprising an aluminum outer clamp body and an inner copper tube by cold pressure welding, characterized in that the inner tube is subjected to a radial pressure greater than the creep limit of the bonded material and less than the bond strength of the bonded material. 2. The apparatus shall be operated in accordance with the method of point 1, consisting of a punch, a pressure thatch, a base thatch and a collar, An advantage of the method of the invention is that a satisfactory chemical bonding of the staple body (aluminum) to the staple body tube is formed from the medium. A better combination of media and aluminum is achieved, better electrical properties, less joint resistance. Said manufacturing process avoids post-machining of the pipe opening. The connection of the copper pipe to the aluminum housing is protected and saves working time and deficient material. The method is more economical than explosion welding technology, which places high demands on technology discipline and occupational safety. The process according to the invention is suitable for single-piece, small-series and large-scale production of high-voltage composite clamps of various types and it is advantageous that cold-pressure welded joints can be produced on conventional forming machines, and the operator need not be qualified. In the attached drawing of FIG. a cross-sectional view of an apparatus according to the invention for carrying out the method according to the invention. According to the invention, a high-voltage composite clamp has been produced on the device according to the invention. The outer aluminum body 7 of the clamp with an outer diameter of 65 mm and an inner diameter of 45 mm was inserted into the sleeve 8. A copper tube 6 with an outer diameter of 45 millimeters was inserted into the inner οίνο ™ of the outer body 7. The inner copper tube 6 was treated with a punch 1, whose lead-in portion 3 had a diameter of 36 mm and the calibration portion 2 had a diameter of 37 mm, with a radial pressure of 10 MP. The working parts of the punch 1 were coated with grease. A joint of the aluminum clamp body 7 with the copper tube 6 was formed by cold pressure welding. In the process, the excess material flowed out into the material container 4 in the base plate 10 and in the pressure plate 5 in the forming process. characterized in that the punch (1) consists of a leading portion (3) of a spherical shape, a caffolder (2) of a spherical shape, wherein the diameter of the calibration portion (2) is 0.5 to 3 mm larger than the diameter of the leading portion. (3) has a 30 ° to 45 ° edge at the periphery of the leading surface, further comprising at least one material container (4) in the base plate (10) and at least one material container (4) formed in the pressure plate (5), the plate (10) is connected to the pressure plate (5) to the sleeve (8).