SU946852A1

SU946852A1 - Apparatus for relief welding of annular parts

Info

Publication number: SU946852A1
Application number: SU802946908A
Authority: SU
Inventors: Владимир Павлович Федоров; Юрий Иванович Морозов; Валерий Николаевич Логвинов
Original assignee: Предприятие П/Я А-1714
Priority date: 1980-06-25
Filing date: 1980-06-25
Publication date: 1982-07-30

Description

(54) УСТРОЙСТВО ДЛЯ РЕЛЬЕФНОЙ СВАРКИ КОЛЬЦЕВЫХ ДЕТАЛЕЙ(54) DEVICE FOR RELIEF WELDING OF RING DETAILS

1one

Изобретение относитс к контактнойThis invention relates to a contact

рельефной сварке деталей кольцевой формы .relief welding of ring-shaped parts.

Известен электрод дл рельефной, сварки деталей кольцевой формы, который представл етс собой бронзовый корпус с установленным в нем медным вкладышем, внутри которого вмонтирован изолированный стеклопластиком съемный подпружиненный фиксатор 1.A known electrode for relief, welding of ring-shaped parts, which is a bronze case with a copper liner installed in it, inside which a removable spring-loaded clamp 1 is embedded in fiberglass-insulated.

Недостатком известного технического решени вл етс недостаточно надежное охлаждение электрода, что приводит к перегреву пружины и резко снижает устойчивость материала изол тора к истиранию. В конечном итоге это оказывает вли ние на производительность сварки и качество сварного соединени , а также ведет к увеличению расхода материалов, используе.мых дл изготовлени электродов.A disadvantage of the known technical solution is insufficient cooling of the electrode, which leads to overheating of the spring and sharply reduces the resistance of the insulator material to abrasion. Ultimately, this affects the welding performance and quality of the welded joint, and also leads to an increase in the consumption of materials used to make electrodes.

Известно устройство дл рельефной сварки кольцевых деталей, содержащее корпус из электропроводного материала с вкладышем дл установки одной из деталей, отверсти ми дл подвода и отвода охлаждающей жидкости и камерой с поршнем, несущим фиксатор второй детали 2.A device for the relief welding of ring parts is known, comprising a housing made of electrically conductive material with an insert for mounting one of the parts, openings for supplying and discharging coolant, and a chamber with a piston carrying the retainer of the second part 2.

Однако данна конструкци электрода обладает низкой работоспособностью, так как воздух, заключенный внутри камеры, при нажатии верхним электродом машины на шток сжимаетс , и повышенное давление способствует его утечке, несмотр на наличие герметизирующих прокладок в паре поршень-ка.мера. Утечки воздуха в дальнейшем не восполн ютс , наступает та10 кой момент, когда шток оказываетс утопленным .However, this electrode design is poorly operable, since the air trapped inside the chamber, when the top electrode of the machine is pressed on the rod, is compressed, and the increased pressure contributes to its leakage, despite the presence of sealing gaskets in the piston-piston pair. Air leaks are not replenished further; a moment comes when the rod is recessed.

Цель изобретени - повышение производительности и качества сварного соеди15 нени за счет повышени надежности конструкции .The purpose of the invention is to increase the productivity and quality of the welded joint by increasing the reliability of the structure.

Claims

The goal is achieved by the fact that the chamber is connected directly to the opening.m of the coolant supply, and to the 20th outlet hole - by means of an annular groove made in the insert from the side of its contact with the housing. In addition, the device is equipped with coolant supply and exhaust openings connected in series with a series of radiator and non-return valve. The drawing shows the proposed device. The device comprises a housing 1, a piston 2 with an electrically insulating latch 3, an insert 4, a radiator 5, a check valve 6 and a spring 7. The device operates as follows. In the initial state, the piston with the latch was raised and cooled with the aid of its liquid, being in a closed system under a certain overpressure 1 with the non-return valve open. The welding of the assembly begins with installation on the liner 4 and the piston with the clamp 3 of the parts to be welded, after which the compression mechanism of the machine for relief welding is activated. At the same time, the upper electrode 8 presses the clamp 3 with a force P and presses the piston with the clamp into the inside of the housing 1. The coolant pressure closes the check valve 6, and the fluid from the chamber in the housing 1 penetrates through the insert 4, extracting heat, into the radiator 5 Having drowned a piston with a retainer in the housing, the upper electrode comes in contact with the parts being welded 9. In the upper electrode circuit — the parts to be welded — liner — the body is flowing welding current. Since an air gap is established between the parts to be welded and the piston with the retainer, the possibility of current shunting is excluded. After welding is completed, the top electrode is raised. At this pressure, + 1 liquid in radiator 5, which can be increased by supplying over-pressure Pg of compressed air, impregnates the piston output with a retainer to its initial state. The weld node is removed. The position is ready to repeat the welding cycle. The proposed design of a relief welding device eliminates sticking of the piston with a retainer, is simple in design, allows welding ring-shaped parts without current shunting, ensures reliable cooling of the electrode and the entire machine, and also reduces the flow rate of the cooling fluid through the use of a closed cooling system. The combination of these positive factors allows an increase in the welding rate and the quality of the welded joint while reducing the energy consumption for losses in the heated electrode. Claim 1. Device for relief welding of ring parts, comprising a body made of electrically conductive material with an insert for mounting one of the parts, holes for supplying and discharging cooling liquid and a chamber with a piston carrying a retainer of the second part, characterized in that performance and quality of the welded joint by increasing the reliability of the design; the chamber is connected to the coolant supply hole directly, and to the drain hole - by means of an annular groove, made in the liner from the contact with the body. 2. A device according to claim 1, characterized in that it is provided with successively installed radiator and non-return valve connected to the coolant supply and exhaust openings. Sources of information taken into account in the examination 1. M. I. Shulman and V. V. Narbutovich. Electrode for relief welding of parts of the annular stern. “Welding production, 1976, No. 54, p. 39.

2. US patent number 3657509, cl. 219-120, 1972 (prototype).