RU215106U1 - DEVICE WITH BELT TENSIONER FOR FIXING PARTS IN THE PROCESS OF INDUCTION SOLDERING - Google Patents

Abstract

The utility model can be used in the process of soldering products in the high-frequency field of the inductor, covering the soldering zone, for example, beryllium or tungsten lining of heat-receiving components of the ITER thermonuclear reactor. The technical result of using the utility model is to obtain a stable clamping force (not less than 10 kg) of large-area parts during the soldering process, under conditions of fast local heating of the soldering zone to 700-750°C and corresponding inhomogeneous deformations due to thermal expansion of the parts. This result is achieved by the fact that the device with a belt tensioner for fixing parts in the process of induction soldering contains two supports installed in a common housing, with the possibility of movement relative to the housing. These supports contain two racks, with one and two support platforms. Racks are mounted on axes, with the possibility of rotation relative to the support body with the possibility of dividing the clamping force in equal parts on each support platform. The force is transmitted to each support by means of a pusher and is regulated by a screw that compresses a heat-resistant alloy spring. The body of the device is fixed relative to the parts to be soldered using a thin stainless steel tape, covering the parts through a spacer, in which there are three rollers through which the tape is pulled. The spacer is installed on the soldered part through an intermediate insert with a cylindrical mating surface, which makes it possible to compensate for deviations from the parallelism of the parts when assembling the device. The tape is fixed relative to the body of the device on movable sliders, which allow uniform tension of the tape during assembly.

Description

Technical field

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

State of the art

Known method of induction soldering and a device for its implementation, disclosed in the source of information (Vologdin VV and other Induction soldering. - Leningrad, Engineering, 1979, 44-45). Moreover, this known method includes heating the parts connected by solder with the help of an inductor until the solder melts. The device for implementing the method includes clamping fixtures for fixing parts during the soldering process, including those with forced cooling of fixture parts. However, the proposed designs of clamping devices do not take into account the need to maintain a stable force of pressing parts to 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 pressing force vector - which is also not taken into account in the proposed designs of clamping devices. A device for induction soldering is known (see RF patent 1787078, class V23K 3/00, 1993), containing a base, a turntable mounted on it with slots for placing soldered parts, an inductor, a mechanism for preloading parts. At the same time, in order to increase the productivity of the soldering process, the device is equipped with a cooling unit made in the form of pressure pads interconnected by a traverse fixed on the base, the pressing mechanism is made in the form of sliders with rollers and a cam fixedly fixed on the axis of the turntable, each slider is spring relative to the socket wall, and the roller is installed with the possibility of interaction with the cam.

In the proposed design of the device, the use of a clamping mechanism of a large area and volume leads to an increase in the heating and cooling time of the soldering zone. To reduce the cooling time in this device, a special cooling unit is used, due to heat removal in the heat conduction mode in the form of pressure pads and a traverse, which increase the volume of heated parts. With a large area of parts, the process of heat removal becomes heterogeneous. In the area of the pressure pads, the temperature will be lower, and where there are no pads, it will be higher. This leads to inhomogeneity of the cooling process, and the appearance of defects for parts of a large area. The known device can be reliably used only if the areas of the pressure pads and parts are equal. And besides, this device does not provide a uniform pressing force of parts over the entire area during the soldering process. The closest in technical essence and the achieved result to the proposed solution is a device for fixing parts in the soldering process (see RF patent 195416, class V23K 1/002, 2020), containing three-point supports, consisting of two racks having one and two support pads installed in the support body with the possibility of rotation relative to each other and the possibility of dividing the clamping force in equal parts on each support platform, while these supports are installed in the common device body with the ability to move relative to it. The provision and adjustment of the clamping force of each three-point support is carried out by compressing a heat-resistant alloy spring with the help of an adjusting screw, which transmits the force to the three-point support through the pusher. The body of the device is fixed relative to the parts to be soldered using a thin stainless steel tape fixed on the body of the device and covering the parts to be soldered through a spacer in which there is a groove for placing the tape.

As a result of the analysis of the design of this device, it should be noted that due to the presence of transverse rigidity of the tape and as a result of its installation in the groove of the spacer and the subsequent rigid fixation of the ends of the tape on the body of the device, during the assembly process of the device, uneven tape tension and even sagging may form on the soldered parts ( no tension) of the tape in the area of the spacer. In addition, if there are parallelism deviations between the surfaces on the soldered parts, where the three-point supports of the device rest, and a spacer with an inserted tape is installed, the tape is skewed relative to the device body and its tension is uneven,

The technical result of using the utility model is to eliminate the indicated shortcomings of the considered devices, to obtain a stable clamping force (at least 10 kg) of large-area parts during the soldering process, under conditions of rapid local heating of the soldering zone up to 700-750 ° C and corresponding inhomogeneous deformations due to thermal expansion of soldered details.

Utility Model Disclosure

A device for fixing parts in the process of induction soldering, containing a body, supports installed in the body with the possibility of movement relative to it and made in the form of two racks, one of which has one and the other has two support platforms, a pusher fixed in the body for creating and transferring pressing forces on each support pad, a heat-resistant alloy compression spring mounted on the pusher, equipped with an adjusting screw, and a retainer fixed on the body for installing the body on the parts to be brazed, made in the form of a thin stainless steel tape, placed with the possibility of covering the parts to be brazed through the spacer, at the same time, said racks are installed with the possibility of rotation relative to each other and division of the clamping force in equal parts on each support platform, what is new is that it is equipped with movable sliders that ensure the fixation of the ends of the said tape on the device body, and the sliders are made with the possibility of moving relative but the device body is independent of each other due to the rotation of the adjusting screws, and the spacer is equipped with three rollers that provide pulling the said tape between them, and an intermediate insert having a cylindrical mating surface with the spacer.

Brief description of the drawings

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

in fig. 1 - device for fixation, general view;

in fig. 2 - section A-A in Fig. one;

in fig. 3 - section B-B in Fig. one.

A device with a belt tensioner for fixing parts during induction soldering 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 supports, consisting of a support body 5, in which one rack 6 with one support platform and a rack 7 with two support platforms are installed. Racks 6 and 7 are installed in the support body 5 on axles 8 with the possibility of rotation relative to each other so that the force applied to the support body 5 is divided in equal parts by each support platform.

The force necessary to fix 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 of a heat-resistant alloy is installed. The adjustment of the force, by compressing the spring, is carried out with the help of 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 stainless steel tape 16, covering the product through a spacer 17. The tape 16 is fixed on each side of the device body with a strap 18, two bolts 19, nuts 20 and a slider 21, which in turn can move up/down with screws 22, thereby providing adjustment of the tape tension on each side of the device body. To exclude the possibility of tape 16 jamming when it is tensioned, the design of the spacer 17 uses three rollers 23, through which the tape 16 is pulled, which, when it is subsequently tensioned by screws 22, is stretched between the rollers 23. The spacer 17 is installed on the soldered part 10 through the intermediate insert 24, which has cylindrical mating surface with spacer 17 and allows you to compensate for the effect of parallelism deviation between the surface of soldered parts 9 and 10.

Implementation of the utility model

A device with a belt tensioner for fixing parts in the process of induction soldering works as follows.

On the soldered parts 9 and 10, prepared for induction soldering, a fixing device is installed. By rotating the adjusting screws 15, the compression springs 14 are brought to their original undeformed state. An intermediate insert 24 and a spacer 17 with a tape 16 stretched between the rollers 23 are installed on the soldered parts and the free ends of the tape 16 are fixed on the sliders 21 inside the device case. By rotating the adjusting screws 22 alternately, the slack is taken and the tape 16 is tightened. Then, turning the adjusting screws 15 alternately, the springs 14 are compressed to the required state with a margin of at least 15-20% of the required force value. The force applied to each support is divided in equal shares on the three support platforms of the racks 6 and 7. Thus, uniform pressing of the soldered parts 9 and 10 is ensured before the soldering process begins.

Soldered parts 9 and 10 with devices installed in the required number for fixing are placed in the area where soldering is carried out. The induction heating source is turned on and the soldering operation is performed.

During the soldering process, parts 9 and 10 heat up, which leads to heating of the supports mounted on parts 9 due to heat transfer. However, the heating of the compression springs 14 turns out to be insignificant, since the long pusher 12 has a low thermal conductivity due to the small cross-sectional area normal to the direction of the heat flow.

The retaining tapes 16 made of stainless steel are made thin (less than the thickness of the skin layer for the high-frequency field of the inductor), due to which small currents are induced in the tapes, which leads to their low heating. As a result, the tapes do not stretch during the soldering process.

Thermal expansion of parts 9 and 10 during the soldering process, expressed in non-uniform deformations due to uneven heating and uneven rigidity of the cross-section of soldered parts, are compensated by structural elements of the device for fixing: mobility of supports with three platforms relative to the body of the device, spring 14 compressed with a margin of 15-20 % of the required force value, the mobility of the spacer 17 relative to the soldered part 10 due to the intermediate insert 24, the uniformity of the tension of the tape 16 due to the preliminary pulling of the ends of the tape in the fixation area to the device body and the use of rollers 23 in the design of the spacer 17. Thus, a uniform clamping is ensured brazed parts 9 and 10 during the soldering process.

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

The use of this device ensures that a stable clamping force (not less than 10 kg) is obtained for large-area parts during the soldering process, under conditions of rapid local heating of the soldering zone up to 700-750 ° C and corresponding inhomogeneous deformations due to thermal expansion of the soldered parts, including those leading to deviations from the parallelism of the surfaces of the soldered parts.

Claims (1)

A device for fixing parts in the process of induction soldering, containing a body, supports installed in the body with the possibility of movement relative to it and made in the form of two racks, one of which has one and the other has two support platforms, a pusher fixed in the body for creating and transferring pressing forces on each support pad, a heat-resistant alloy compression spring mounted on the pusher, equipped with an adjusting screw, and a retainer fixed on the body for installing the body on the parts to be brazed, made in the form of a thin stainless steel tape, placed with the possibility of covering the parts to be brazed through the spacer, at the same time, said racks are installed with the possibility of rotation relative to each other and dividing the clamping force in equal parts on each support platform, characterized in that it is equipped with movable sliders that provide fixation of the ends of the said tape on the device body, and the sliders are made with the ability to move relatively but the body of the device is independent of each other due to the rotation of the adjusting screws, and the spacer is equipped with three rollers that provide pulling the said tape between them, and an intermediate insert having a cylindrical mating surface with the spacer.

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