SU1486305A1 - Device for resistance miniature welding - Google Patents

Description

The invention relates to welder2

technology and can be used in instrumentation for the welding of metals of small thickness and cross sections. The purpose of the invention is to improve the quality of welding by ensuring the parallelism of the working surfaces of the electrodes and reducing the inertia of moving parts. Thrust 13 move together with the stop 17 down. The stop 9 under the action of the spring 21 rises up to the stop into the screw 18, releasing the lever 6, which under the action of the working spring 8 rotates around the axis 7. The electrode holder 2 together with the electrode 3 is lowered onto the work table 20. The thrust 13, continuing to fall focus 15 on the microswitch 16. The welding current is turned on and

there is welding. 2 Il.

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1486305

The invention relates to the welding technique and can be Used in instrument engineering for the welding of metals of small thickness and cross sections.

• The purpose of the invention is to improve the quality of welding by ensuring the parallelism of the working surfaces of the electrodes and reducing the inertia of moving parts. ten

On league. 1 shows a device for contact micro-welding, movable parts in the initial position; figure 2 is the same in the working position.

The mechanism contains a spring parallelogram consisting of two identical flat springs 1, an electrode holder 2 with an electrode 3 fixed in it, and a housing 4 in which the drive mechanism is located. Inside the spring parallelogram on the body 4, an additional flat spring 5 and a two-arm lever 6, swinging around the axis 7, are fixed at one end. The flat spring 5 acts by the free end 25 on the electrode holder 2, removes the spring parallelogram from the neutral position and balances its elasticity vices. The double-shouldered lever 6 at one end acts on the electrode holder 30, returns the spring parallelogram to the neutral position and

presses the electrode 3 to the welded product with a given force. '· Other. the end of the two shoulders lever 6 is connected to 35 working spring 8, which creates the specified welding force, and interacts with the movable stop 9. On the movable stop 9, performing plane-parallel movement relative to the non-40 movable axes 10, a screw 11 regulating the welding force and a pointer 12 are installed the magnitude of the force connected to the working spring 8.

Relatively fixed axles 10 45

the plane-parallel movement of the thrust 13, connected by a driving mechanism (not shown), which is held in the initial position by means of the return spring 14, is made.

There is a stop 15 on the knot of the microswitch 16 including the welding current, and the stop 17 acting on the lever system of the movable stop 9. The screw 18 55 sets the neutral position of the spring parallelogram, and the screw 19 sets the lift height. electrode 3 above the surface working ·

table 20. The spring 21 closes the moving parts of the mechanism, and the screw 22 adjusts the forces of the springs 14 and 21 to facilitate the operation of the actuator.

The device works as follows.

Thrust 13 together with the stop 17 moves down. The movable stop 9 under the action of the spring 21 rises up to the stop into the screw 18. The growl 6 rotates around the axis 7 under the action of the working spring 8. The electrode holder 2 together with the electrode 3 is lowered. Traction 13, continuing to fall, the stop 15 acts on the node of the microswitch 16 and switches on the welding current. If the work table 20 is initially raised up to contact with the electrode 3, and then lifted further by a distance "a" (Fig. 2), then the working stroke of the moving electrode is defined, determined by the dimensions of the spring parallelogram, within which the electrode performs an exact straight-line movement.

When releasing the thrust 13, the stop 17 by means of the return spring 14 acts on the lever system of the movable stop 9. The movable stop 9 goes down, turns the lever 6 around the axis 7. The electrode holder 2 together with the electrode 3 rises above the surface of the working table 20 under the action of the flat spring 5 (FIG .one).

The effectiveness of the invention is achieved by the parallelism of the working surfaces of the electrodes during welding. The inertia of the movable part of the compression mechanism is reduced by ensuring high accuracy and stability of the compression force at the electrodes.

Claims (1)

Formula and statement:> E and I A device for contact micro-welding, comprising a housing, a compression mechanism made in the form of a spring parallelogram with a working spring, welding electrodes with an electrode holder and a drive mechanism with a charger, characterized in that, in order to improve the quality of welding by ensuring the parallel surfaces of the working surfaces of the electrodes and reducing inertia of moving parts, the drive mechanism is equipped with a moving 6 1486305 an emphasis, and a compression mechanism — a two-arm lever connected to the working spring, and an additional flat spring, while the two shoulders lever is fixed on the body with the possibility of periodic interaction with one condom with the electrode holder, and the other, connected to the working spring, with a movable stop placed on the drive the mechanism. Phi e. 2