RU195416U1 - DEVICE FOR FIXING PARTS IN THE SOLDERING PROCESS - Google Patents

Abstract

The utility model can be used in the process of soldering products in the high-frequency field of an inductor, for example, beryllium or tungsten cladding of heat-absorbing components of the ITER thermonuclear reactor. The technical result of using the utility model is to obtain a stable clamping force (at least 10 kg) of products during brazing under conditions of rapid heating of the zone soldering up to 700 ° С - 750 ° С.The indicated result is achieved by the fact that the device for fixing parts during the soldering process contains two supports installed in a common building se, is movable relative to the housing. These supports contain two racks with one and two supporting platforms, respectively, forming a three-point support. The racks are mounted on the axles with the possibility of rotation relative to the possibility of dividing the clamping force in equal parts to each supporting platform. The force is transmitted to each three-point support by means of a pusher and is regulated by a screw compressing a spring of heat-resistant alloy. The case of the device is fixed relative to the soldered parts using a thin stainless steel tape covering the parts through a spacer.

Description

Technical field

The utility model can be used in the process of soldering products in the high-frequency field of an inductor, for example, beryllium or tungsten cladding of heat-absorbing components of the ITER thermonuclear reactor.

State of the art

A known method of induction soldering and a device for its implementation, disclosed in the information source (Vologdin V.V. and other induction soldering. - Leningrad, Mechanical Engineering, 1979, from 44-45). At the same time, this known method includes heating the parts connected by solder using an inductor until the solder melts. A device for implementing the method includes clamping devices for fixing parts during the soldering process, including with forced cooling of the device parts.

However, the proposed designs of clamping devices do not take into account the need to maintain a stable force of pressing parts against each other during the soldering process. In addition, during the soldering process, the product heats up and expands, which leads to the need to maintain a normal angle between the soldering plane and the clamping force vector - which is also not taken into account in the proposed designs of clamping devices.

The closest in technical essence and the achieved result to the proposed solution is a device for fixing parts in the process of soldering beryllium cladding to a heat sink panel, consisting of three-point supports, the force to which is transmitted using an elastic spring. Each spring is mounted on two threaded rods mounted pivotally in a single device casing with the ability to tilt relative to the product. Preliminary bending of each spring is created with the help of adjusting nuts. The product prepared for soldering together with the fixation device is fed into the inductor heating zone and soldering is performed (IV Mazul, VA Belyakov, A. A. Gervash, etc. “Technological challenges at ITER plasma facing components production in Russia” // Fusion Engineering and Design, Elsevier, 2016 - page 1028-1034).

As a result of the analysis of the design of this device, it should be noted that the threaded rods located between the product and the inductor are very hot during soldering, which leads to their elongation and weakening of the clamping force. The flat springs used in the design have a small margin of deformation (stroke) in the elastic zone, which leads to a significant reduction in the pressing force when heating the studs. The product heats up and expands during the brazing process, and the three-point supports move with the product. The single casing of the device, with respect to which all the supports are fixed, remains cold, as a result of which an angle is formed between the soldering plane and the clamp force vector, which reduces the useful component of the clamp force, in addition, a “shear” component of the force appears.

The technical result of using the utility model is the elimination of these drawbacks of the considered devices, obtaining a stable clamping force (at least 10 kg) of the parts during the soldering process, under conditions of rapid heating of the soldering zone to 700 ° С-750С.

Disclosure of Invention

The specified technical result is ensured by the fact that in the device for fixing parts during the soldering process, containing supports mounted in a common housing with the possibility of movement relative to it, a compression spring with an adjusting screw to create a clamping force at each point of support and a lock of the device body relative to the soldered parts, new is that the supports consist of two racks having one and two supporting platforms, respectively, forming a three-point support, and the racks are installed in the housing with the possibility of orot relative to each other with the possibility of dividing the clamping force in equal parts to each supporting platform, and the spring is made of heat-resistant alloy with the ability to transfer force to the three-point support through the pusher, while the housing retainer is made in the form of a thin stainless steel tape mounted on the device’s body and covering soldered parts through a spacer.

Brief Description of the Drawings

The essence of the utility model is illustrated by graphic materials on which:

in FIG. 1 - device for fixing, General view;

in FIG. 2 is a view A of FIG. 1;

in FIG. 3 is a view B of FIG. 1.

A device for fixing parts during the soldering process consists of a collapsible body made of two transverse plates 1 and 2 connected by two side plates 3. Screws 4 are installed in the side plates 3, which are travel stops for two three-point supports.

The three-point support consists of a housing 5, in which one double support stand 6 and a stand 7 with one support platform are installed. Racks 6 and 7 are mounted on axles 8 with the possibility of rotation relative to each other so that the force applied to the three-point support is divided in equal parts to each supporting platform.

The force required to fix the parts 9 and 10 during the soldering process is transmitted to the three-point support through the centering spacer 11 using the pusher 12. On the pusher 12, through the centering washers 13, a compression spring 14 made of heat-resistant alloy is installed. The force adjustment, by compressing the spring, is carried out using screws 15 installed in the plate 1 of the device body.

The body of the device is fixed relative to the soldered parts using a thin tape 16 made of stainless steel, covering the product through the spacer 17. On the spacer 17 there is a centering groove in which the tape 16 is placed. The tape 16 is fixed to the body of the device using the clamping plates 18 and 19 and screws 20 .

Utility Model Implementation

A device for fixing parts during the soldering process is as follows. A device for fixing is installed on soldered parts prepared for induction brazing. Rotating the adjusting screws 15, bring the compression springs 14 to their original undeformed state. Install the spacer 17 and the tape 16 on the product and fix the free ends of the tape 16 on the device casing in a tense state. Rotating the adjusting screws 15 in turn, compress the springs 14 to the desired state with a margin of at least 15-20% of the required force value. The force applied to the three-point support is divided in equal proportions on the three supporting platforms of the racks 6 and 7. Thus, uniform clamping of the parts during the soldering process is ensured.

Parts with fixing devices installed in the required quantity are placed in the area where the soldering is carried out. The source of induction heating is turned on and a soldering operation is performed.

In the process of soldering, the parts heat up, which leads to the heating of three-point supports due to heat transfer. However, heating of the compression springs 14 is negligible, since the long pusher 12 has low thermal conductivity, due to the small cross-sectional area normal to the direction of the heat flux.

Stainless steel holding tapes 16 are made thin (less than the skin layer thickness), due to which small currents are induced in the tapes, which leads to low heating. As a result, the tapes do not stretch during the soldering process.

At the end of the soldering operation, the fixing device is removed from the finished product, loosening the holding tape 16.

The use of this device provides and maintains a stable clamping force (at least 10 kg) of products during induction brazing, under conditions of rapid heating of the soldering zone to 700 ° C-750 ° C. The clamping force adjustment mechanism is simple, reliable and convenient.

Claims (1)

A device for fixing parts during the soldering process, containing supports installed in a common housing with the ability to move relative to it, a compression spring with an adjusting screw to create a clamping force at each support point and a device housing lock relative to the soldered parts, characterized in that the supports consist of two racks having one and two supporting platforms, respectively, forming a three-point support, and the racks are installed in the housing with the possibility of rotation relative to each other and separation of the clamping force in equal parts to each support platform, and the spring is made of heat-resistant alloy with the possibility of transmitting force to the three-point support through the pusher, while the housing retainer is made in the form of a thin stainless steel tape mounted on the device’s body and covering soldered parts through a spacer.

Images