SU1486488A2 - Method of joining glass to metal or glass - Google Patents

Description

The invention relates to the connection of precision glass parts to one another or glass with metal. The invention relates to the connection of precision glass parts to one another or to metal parts and can be used in the electronics industry and instrumentation for the manufacture of hermetic bushings when connecting device assemblies using glass. .

The aim of the invention is the elimination of the possibility of edge neurovar in the plane of the connection. ’

In the process of soldering in vacuum, parts are rotated around an axis by an angle of 360 / n degrees when the compressive force is removed, where η is the number of compression cycles of at least two.

FIG. 1 shows the period of the process of soldering parts; in fig. 2 removal of compressive force and rotation

parts after moving displacement2

details and can be used in electronic, instrument-making industry for ‘Production of hermetic bushings when connecting the instrument assemblies using glass. In order to eliminate the possibility of edge penetration in the joint plane in the process of soldering in vacuum, the compressive force is removed cyclically with simultaneous rotation of parts around the axis by an angle of 360 / n degrees, where n is the number of compression cycles of at least 2. The method ensures the absence of boundary penetration at 100%. 3 il.

upwards; Fig. Completion of the process of soldering parts.

In the drawings, the fixed lower stem 1 of the welding unit, the lower punch 2, the parts to be joined 3, are indicated.

4, the upper punch 5, the upper movable rod 6 of the welding unit, the connection zone 7, the marginal lack of penetration 8, the pressing force P.

The method of connection is as follows.

The connected parts 3, 4 together with clamping punches 2, 5 are placed between the rods 1, 6 in the vacuum chamber of the welding unit, then the chamber is evacuated and the parts are heated to a temperature corresponding to the glass viscosity 10 ¹¹ - 10 ^<3 P, with compressive force P, which is transmitted on so98

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uniform parts through punches 2, 5 and rods 1, 6 of the welding unit.

Rotating the clamping punch 6, the parts are rotated around the $ axis by an angle of 360 / n degrees, with the compressive force removed after the upper shaft 6 has been lifted. The process of cyclic change of the compressive force and rotation of the part around the axis is carried out at equal intervals time depending on the selected number of compression cycles (more than two).

The number of cycles of application of compressive force and rotation of parts at an angle of 360 / n degrees is chosen experimentally in order to eliminate boundary penetrability 8 in zone 7 of the joint depending on the time of soldering of the parts. After the last rotation of the parts, a compressive force is applied until the end of the soldering process, then the compressive force is removed and, without rotating the parts, they are 25 additional heated at 10-50 ° C with a holding at this temperature for 1060 minutes. After heating, the parts are cooled in a vacuum chamber to room temperature. thirty

Example. For connection use the device parts of quartz glass brand KU-1 with a diameter of 90 mm and a thickness of 24 and 46 mm. Parts together with clamping punches, made of graphite MPG-6, are placed in a vacuum chamber between the movable and stationary rods of a welding installation of the type SDVU-26M. The chamber is pumped to a residual pressure to

18 4

10 ^"3 GPa. Then, parts heated to 1060, the corresponding viscosity quartz glass CG-1 November ¹⁰ P. When a predetermined time (12 minutes) required for the formation of the compound at the same temperature, using three cycles of compression parts with a force of 18 MPa with two twists around the axis at an angle of 360/3 ° while simultaneously removing the compressive force.

After the end of the soldering process, additional heating of the parts to 1080 ° C is carried out with an exposure time of -. 10 min, cool parts in vacuum to 800 ° C at a rate of 2 deg / min and then at a speed of 15 deg / min to room temperature.

The method eliminates the occurrence of regional lack of penetration during welding of precision parts by 1007. And also allows you to correct defects in welded joints in the form of regional penetration.

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Claims (1)

Claim The method of combining glass with metal or glass by ed. St. No. 897724, which means that, in order to eliminate the possibility of edge penetration in the joint plane, in the process of soldering in vacuum, the compressive force is removed cyclically with simultaneous rotation of the welded parts around the axis by an angle equal to 360 / n degrees, where n is the number of compression cycles, but not less than 2. 1486488 7 b FIG. 2 \ h \\\\\\\> ^ '^ χχΧ'ύΧ 1486488