CS251986B1

CS251986B1 - A method for producing a high voltage composite clamp and apparatus for performing this method

Info

Publication number: CS251986B1
Application number: CS855300A
Authority: CS
Inventors: Jozef Baca; Milan Turna; Vladimir Kostik; Rastislav Ciernik; Milan Kovacik
Original assignee: Jozef Baca; Milan Turna; Vladimir Kostik; Rastislav Ciernik; Milan Kovacik
Priority date: 1985-07-17
Filing date: 1985-07-17
Publication date: 1987-08-13
Also published as: CS530085A1

Abstract

Riešenie sa týká sposobu výroby vysokonapaťovej svorky a zariadenia na jeho realizáciu. Podstatou spósobu výroby kompozitně] svorky, pozostávajúcej z vonkajšieho hliníkového telesa svoťky a z vnútornej rnedenej rúrky, je, že na vnútornú medenú rúrku sa posobí radiálnym tlakom vačším ako medza tečenia spojovaného materiálu a menším ako medza pevnosti spojovaného materiálu. Podstatou zariadenia na realizáciu sposobu, pozostávájúceho z lisovníka, prítlačnej došky, základnej došky a objímky, je, že lisovník má nábehovú a kalibračnú časť gutového tvaru, pričom kalibračná časť má priemer o 0,5 až 3 mm váčší ako náběhová časť, ktorá má zrazenú nábehovú hranu o uhol 30° až 45°. V základnej doske a v prítlačnej doske sú zásobníky materiálu přebytečného pri tvárnění. Riešenie je možné využiť pri výrobě kompozitných vysokonapáťových svoriek, připadne pri zváraní dvoch róznych materiálov tlakom za studená.The solution relates to a method of manufacturing a high-voltage terminal and a device for its implementation. The essence of the method of manufacturing a composite terminal, consisting of an outer aluminum coil body and an inner copper tube, is that the inner copper tube is subjected to a radial pressure greater than the yield strength of the material being joined and less than the strength limit of the material being joined. The essence of the device for implementing the method, consisting of a punch, a pressure plate, a base plate and a sleeve, is that the punch has a lead-in and calibration part of a guillotine shape, the calibration part having a diameter of 0.5 to 3 mm larger than the lead-in part, which has a beveled lead edge at an angle of 30° to 45°. There are reservoirs of excess material during forming in the base plate and in the pressure plate. The solution can be used in the production of composite high-voltage terminals, or in the cold pressure welding of two different materials.

Description

Riešenie sa týká sposobu výroby vysokonapaťovej svorky a zariadenia na jeho realizáciu. Podstatou spůsobu výroby kompozitnej svorky, pozostávajúcej z vonkajšieho hliníkového telesa svorky a z vnútornej rnedenej rúrky, je, že na vnútornú medenú rúrku sa působí radiálnym tlakom vačším ako medza tečenia spojovaného materiálu a menším ako medza pevnosti spojovaného materiálu.The solution relates to a method for producing a high voltage terminal and a device for its implementation. The essence of the method of producing a composite clamp, consisting of an outer aluminum clamp body and an inner brown tube, is that the inner copper tube is subjected to radial pressure greater than the flow rate of the bonded material and less than the strength of the bonded material.

Podstatou zariadenia na realizáciu sposobu, pozostávajúceho z lisovníka, prítlačnej došky, základnej došky a objímky, je, že lisovník má náběhová a kalibračnú časť gutového tvaru, pričom kalibračná časť má priemer o 0,5 až 3 mm váčší ako náběhová časť, ktorá má zrazenú náběhová hranu o uhol 30° až 45°. V základnej doske a v prítlačnej doske sú zásobníky materiálu prebytočného pri tvárnění.The essence of the apparatus for making a method consisting of a punch, a press-on dowel, a basic dowel and a sleeve is that the punch has a gutter and a calibration portion of the gutter, the calibrating portion having a diameter of 0.5 to 3 mm greater than the leading portion having a chamfer leading edge of 30 ° to 45 °. In the base plate and in the pressure plate there are containers of excess material in the forming.

Riešenie je možné využiť pri výrobě kompozitných vysokonapáťových svoriek, připadne pri zváraní dvoch roznych materiálov tlakom za studená. Ί...... 2_ 3 /—' / 5 / / b / _7 / / / "" 10 2 51986 „L- /// z / 251986The solution can be used in the production of composite high-voltage clamps, with cold pressures when welding two different materials. Ί ...... 2_ 3 / - '/ 5 / / b / _7 / // / "" 10 2 51986 "L- /// z / 251986

Vynález sa týká spósobu výroby vysokonapaťovej kompozitně] svorky a zariadenia na jeho realizáciu. V súčasnej době sa hladajú v strojárskych technológiách rožne riešenia výroby vysokonapaťových měděných svoriek, ktoré sa používajú v rozvodniach vysokého napatia a doteraz sa vyrábali odlievaním celého telesa svorky z médi. V snahe ušetřit drahý a deficitný farebný kov sa odlievané měděné teleso svorky nahradilo hlinlkom a v mieste spojenia vodiča s telesom svorky sa konštrukčnou úpravou použila měděná rúrka. Pre spojenie rúrky s telesom svorky sa v poslednej době používajú rožne technológie v tvárnění, a to mechanickým zalisovaním, pomocou gumy, pričom styčné plochy hliníka a rúrky sú reliéfované alebo v špeciálnych technológiách zváranie explóziou. Pri doterajšom rnechanickom zalisovaní sa nepodařilo vylúčiť nepriaznivé následky, ktoré takéto spojenie može zanechat. V tvárnění nie sú zatial' uspokojivo riešené spůsoby, dotýkajúce sa výroby týchto vysokonapaťových kompozitných svoriek.BACKGROUND OF THE INVENTION The present invention relates to a method for producing a high-voltage composite clamp and apparatus for making it. Nowadays, high-voltage copper clamp solutions are used for high-voltage copper clamping technology in high-voltage switchboards and have been manufactured by casting the entire clamp body from the medium. In an effort to save expensive and deficient color metal, the cast copper body of the clamp was replaced with aluminum and a copper tube was used in the construction of the conductor connection to the clamp body. For the connection of the pipe to the clamp body, lathing technologies have recently been used in the form of mechanical molding by means of rubber, while the aluminum and pipe contact surfaces are embossed or in special technologies by explosion welding. Until now, mechanical compression has not succeeded in excluding the adverse effects that such a connection can leave. In the molding process, the processes involved in the production of these high-voltage composite clamps are not yet satisfactorily solved.

Uvedené nedostatky odstraňuje spůsob výroby vysokonapaťovej kompozitnej svorky, pozostávajúcej z hliníkového vonkajšieho telesa svorky a z vnútornej medenej rúrky zváraním tlakom za studená, ktorého podstatou je, že na vnútornú medenú rúrku sa působí radiálnym tlakom, ktorý je vSčší ako medza tečenia spojovaného materiálu a menší ako medza pevnosti spojovaného materiálu.The above drawbacks are overcome by the process of producing a high-voltage composite clamp consisting of an aluminum outer clamp body and an internal copper tube by cold pressure, the principle being that the inner copper tube is subjected to a radial pressure that is greater than the flow rate of the bonded material and less than the limit strength of the bonded material.

Zariadenia na vykonáváme spósobu podta vynálezu pozostáva z lisovníka, prítlačnej došky, základnej došky a objímky a jeho podstata je v tom, že lisovník pozostáva z nábehovej časti gutového tvaru, kalibračnej časti gulového tvaru, pričom priemer kalibračnej časti je o 0,5 až 3 mm váčší ako priemer nábehovej časti. Náběhová časť má na obvode nábehovej plochy zrazenú hranu 30° až 45°, ďalej v základnej doske je vytvořený aspoň jeden zásobník materiálu a v prítlačnej doske je vytvořený aspoň jeden zásobník materiálu, pričom základná doska je s přítlačnou doskou spojená objímkou.The device according to the invention consists of a punch, a press-on dowel, a basic dowel and a sleeve, the principle being that the punch consists of a gutter-shaped part, a spherical-shaped calibration part, the diameter of the calibration part being 0.5 to 3 mm greater than the diameter of the leading portion. The leading portion has a 30 ° to 45 ° chamfer at the periphery of the leading surface, further 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

OBJECT

A method for producing a high voltage composite clamp consisting of an aluminum outer clamp body and an internal copper pipe by cold pressure welding, characterized in that a radial pressure greater than the flow rate of the bonded material is applied to the inner pipe and less than the strength of the bonded material.

2. The apparatus according to claim 1, comprising a punch, a press flange, a base flange and a sleeve. The advantage of the method of the invention is to provide a satisfactory chemical bonding of the body (aluminum) of the clamp body to the clamp body of the medium. . Improved media and aluminum bonding, improved electrical properties, less bond resistance are achieved. Said manufacturing method eliminates additional chip machining of the pipe opening. The connection of the copper tube to the aluminum body is protected and saves working time and deficient material. The method is more economical than explosion-welding technology, which places high demands on technological discipline and occupational safety. The method according to the invention is suitable for piece, small series and large series production of high voltage composite clamps of various sizes and the advantage is that the cold pressure welded joints can be produced on conventional forming machines, with no need for the operator. BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawing, the apparatus according to the invention is shown in cross-section for carrying out the method of the invention. According to the invention according to the invention, a high-voltage composite clamp has been produced. An outer aluminum clamp body 7 with an external diameter of 65 mm and an inside diameter of 45 mm was inserted into the sleeve 8. A copper tube 6 with an outer diameter of 45 mm was inserted into the inner body 7 of the outer body 7. The inner copper tube 6 was treated with a punch 1 whose leading part 3 had a diameter of 36 mm and the calibration part 2 had a diameter of 37 mm and a radial pressure of 10 MP. Working parts of punch 1 were lubricated. A joint of the aluminum clamp body 7 with the copper tube 6 was formed by cold pressure welding. In doing so, the surplus material flowed into the material container 4 in the base plate 10 and in the pressure plate 5. The joint was characterized by improved bonding of medium and aluminum than in the prior art and had less electrical resistance. characterized in that the punch (1) consists of a leading part (3) of a spherical shape, a calibration part (2) of gut shape, the diameter of the calibration part (2) being 0.5 to 3 mm greater than the diameter of the leading part (3) has a chamfered edge of 30 ° to 45 ° at the periphery of the leading surface, at least one material container (4) is formed in the base plate (10) and at least one material container (4) is formed in the pressure plate (5), wherein the base plate ( 10) is connected to the sleeve (8) with the pressure plate (5). 1 sheet of drawings 251986