SU551144A1

SU551144A1 - Contact Welding Device

Info

Publication number: SU551144A1
Application number: SU2159468A
Authority: SU
Inventors: Юрий Борисович Петров; Владимир Васильевич Коновалов; Вадим Николаевич Рябинкин; Владимир Федорович Чуркин; Валентин Васильевич Солозобов
Original assignee: Предприятие П/Я В-2438
Priority date: 1975-07-22
Filing date: 1975-07-22
Publication date: 1977-03-25

Description

(54) УСТРОЙСТВО ДЛЯ ПРИВАРКИ КОНТАКТОВ(54) DEVICE FOR WELDING CONTACTS

1one

Изобретение относитс х области контактной сварки деталей и может быть использовано в приборостроении, электротекнической и радиопромышленности, например, дл приварки контактов к пластинчатым пружинам реле.The invention relates to the contact welding of parts and can be used in instrument making, electrotechnical and radio industry, for example, for welding contacts to plate spring of relays.

Известно устройство дл сварка контактов , которое содержит сварочную головку с механизмом сжати , создающим сварочное давпегше, механизм подачи провопеки , многопозиционный стол дд подачи пластинчатых пружин в зону сварки и механизм отрезки контактной проволоки.A device for welding of contacts is known, which contains a welding head with a compression mechanism that creates a welding pressure, a supply mechanism, a multi-position table for supplying plate springs to the welding zone and a mechanism for cutting wire.

Недостатком этого устройства вл етс то, что контактна проволока, например серебр на , через сварочную головку подаетс в зону и прижимаетс к пластинчатой пружине механизмом сжати с посто нной величиной сварочного давлени , действующего до окончани сварочного импульса.The disadvantage of this device is that the contact wire, such as silver, through the welding head is fed into the zone and pressed against the plate spring by a compression mechanism with a constant value of the welding pressure, which is active until the end of the welding pulse.

Наиболее близким к изобретению вл етс устройство, содержащее нижний электрод, сварочную головку, выполненную в виде установленного в корпусе с возможностью возвратно-поступательного перемещени шпиндел с размещенной внутри него цангой-электродом , и пружину сварочного давлени .Closest to the invention is a device comprising a lower electrode, a welding head made in the form of a spindle mounted in a housing with the possibility of reciprocating movement of a spindle with a collet electrode placed inside it, and a welding pressure spring.

В этом устройстве механизм сжати также создает давление на свариваемые детали в течение всего цикла сварки, что приводит к избыточной осадке контактной проволоки, вызывающей ухудщение качества приварки и увеличение расхода проволоки.In this device, the compression mechanism also creates pressure on the parts to be welded during the entire welding cycle, which leads to excessive draft of the contact wire, which causes deterioration in the quality of welding and an increase in the consumption of wire.

Целью изобретени вл етс повышение качества приварки контактов путем ограничени сварочного давлени по достижении заданной величины осадки контактной проволоки .The aim of the invention is to improve the quality of the welding of the contacts by limiting the welding pressure upon reaching a predetermined amount of precipitation of the contact wire.

Claims

The goal is achieved by the fact that the proposed device, comprising a lower electrode, a welding head and a welding distance spring, is provided with an annular spring mounted coaxially with the spindle, an adjustable nut-stop, and two threaded bushings arranged one inside the other, while the inner sleeve is fixed on the the ability to interact with the welding pressure spring, one end of the outer sleeve is connected to the spindle with the aid of the aforementioned ring spring, and the other end of this sleeve is connected to the stop nut, freely mounted on the spindle and installed with the possibility of interaction with the body at the time of precipitation. FIG. 1 shows the proposed device, a general view; in fig. 2 - welding head, cut. The device for welding contacts contains a welding head in the form of a housing in the housing 1 with the possibility of a reciprocating translational movement of the spindle 2, in the lower part of which there is a collet electrode 3 with the contact wire 4 passed through it (Fig. 2). The spindle 2 has a welding pressure spring 5 and a threaded inner sleeve 6, which serves to control the pressure of the draft. The sleeve 6 spans the external thread sleeve 7, which is connected to the spindle 2 by an annular spring 8 with the possibility of rotational movement. The sleeve 7 is threadedly connected to the nut-stop 9 located on the spindle 2 with the possibility of reciprocating movement and connected by pins 10 passing through the groove 11 of the spindle 2 with the movable rod 12 located inside the spindle

2. The rod 12 interacts with the flag 13c located at the power supply sensor 14 limit switch located on it (not shown). Plate spring 15 {FIG. 2), to which the contact wire 4 is welded, is supported on the lower electrode 16. The device works as follows. When moving the spindle 2 down the collet electrode 3, adjusted at the correct clamping force, delivers the contact wire 4 to the plate spring 15. Compressive force spring 5 through the sleeve 6 transmits the welding pressure through the spindle 2 and the collet electrode 3 to the contact wire 4 and presses it to the leaf spring 15, and the latter to the lower electrode 16. With the passage of a welding current pulse due to melting The contact wire 4, the spindle 2, under the action of the spring 5, moves downwards by a predetermined amount of precipitation of the contact wire, mounted on a vernier on the movable rod 12 by means of a threaded sleeve 7 and a nut-stop 9. The nut-stop 9 when the specified precipitation value is goes to the housing 1 and through the threaded bushing 7 and the annular spring 8 acts on the spindle 2, preventing its further movement and thereby relieving the pressure from the contact wire 4. At the same time, the stop nut 9 moves downwards, the moving brush is not behind it 12 which When the contact wire reaches the set value, the flag 13 interacts with the sensor 14 limit switch and turns off the welding power source. After welding the contact wire 4 to the leaf spring 15, the spindle 2 is operated, the stop nut 9, lifting together with the spindle 2, returns to its original position, together with it the moving rod 12 returns to its original position, releasing the limit switch of the power source sensor 14. Then the cycle repeats. The described construction of the device makes it possible to completely relieve or limit in time the effect of the welding pressure on the welded joint upon reaching a predetermined amount of contact wire draft, thereby obtaining a high-quality welded joint. Apparatus of the invention for welding contacts, comprising a lower electrode, a welding head made in the form of a spindle mounted in a housing with the possibility of reciprocating movement of a spindle with a collet ohm-Electromy located inside it, and a welding pressure spring, characterized in that improving the quality of welding of contacts by limiting the welding pressure upon reaching a predetermined amount of precipitation; the device is equipped with an annular spring installed coaxially with the spindle and adjustable with a nut-up rum, and two threaded bushings located one inside the other, with the inner sleeve fixed to the spindle with the ability to interact with the welding pressure spring, one end of the outer sleeve connected to the spindle with the aid of the aforementioned ring spring, and the other end of the sleeve is connected to the nut- a stop freely mounted on the spindle and installed with the possibility of interaction with the body at the time of the draft.

12

C

014.1

Aa

15

3

FIG. 2