RU1773634C - Device for welding with pendular oscillations of welding torch - Google Patents

Abstract

Usage: automatic welding of butt and fillet welds. SUMMARY OF THE INVENTION: the device comprises an actuator 2 with a cam 3 on its output shaft. The device has two parallel pushers, one of which, for example, the pusher 18, is made with one finger on one of its ends, the other, for example, the pusher 17, has two, and on the opposite ends of the pushers mounted copy rollers 19 and 20, installed in contact with cam. The device has a & 1 204 СЛ С XI XI с О СА

Description

fs / g. /

swings, made in the form of a screw with a carriage and a two-arm lever 5. At one end of the two-arm lever 5, a burner 6 is fixed, and the other end of the lever 5 is made in the form of a plug 7. The carrier includes 15 in the form of a rotary disk with a groove 16, two guides 12 and 13, one of which is stationary and the other is mounted on the carriage 9 of the amplitude control mechanism. The pushers 17 and 18 are placed in the guides 12 and 13 with the possibility of reciprocating movement, and the pusher 17 with two fingers is placed in the guide 13 mounted on the carriage 9, one of the fingers of this pusher is placed in the fork of the two shoulders of the lever 5, and the other the finger and the finger of the second pusher are placed in the carrier groove 16 15 The design of the device ensures that the oscillations of the burner are performed without the use of a return spring, which allows to improve the welding quality by ensuring the same travel speed no burner in both directions of oscillation, and also reduce the power of the used electric motor. Zil.

The invention relates to welding production and can be used in automatic welding of butt and fillet welds made with electrode vibrations.

Known devices for welding with oscillations of the welding torch (ed. St. USSR Nfe 414067, class B 23 K 9/30, ed. St. USSR Ms 891285, class B 23 K 9/30) containing a vibration drive with a housing and a kinematically coupled spring-loaded copier coupled to the burner interacting with the cam face.

The disadvantage of these devices is the presence of a spring to press the copier (collar rollers) to the end surface of the cam, which provides the return movement of the burner during oscillations. The hold-down spring alternately acts in conjunction with the direction of oscillation of the burner (downward movement of the cam), then direction of oscillation of the burner (cam movement). Consequently, the presence of a clamping spring leads to a variable force action on the cam and a different speed of the burner when changing the direction of its oscillation. This leads to a deterioration in the quality of the welds. To partially compensate for this phenomenon, drives are used with excess motor power.

The closest in technical essence is a welding device with oscillations of the welding torch (see ed. St. USSR No. 1480999, class B 23 K 9/30), containing a drive with a cam, a spring-loaded two-arm lever with a welding torch, a mechanism for changing the amplitude oscillations in the form of a screw with a movable carriage on which a copier is mounted

The disadvantage of this device is the presence of a spring, leading to instability of the oscillation speed of the welding torch

The aim of the invention is to improve the quality of welding by ensuring the same speed of movement of the torch on both sides of its vibrations.

This goal is achieved by the fact that the known device containing the drive, on the output shaft of which a cam is fixed, in contact with the end of which a carbon roller is connected, connected through

a mechanism for controlling the amplitude of oscillations, made in the form of a screw with a carriage mounted on it, with a two-arm lever, at one end of which a burner is fixed, equipped with a carrier in the form

a rotary disk with a diametral groove, a second tracer roller mounted in contact with the cam, two guides, one of which is fixed, and the other is mounted on the carriage

amplitude control mechanism. The device is also equipped with two parallel pushers, one of which is made with one finger on one of its ends, the other with two, and on the opposite ends of the pushers the copier rollers are mounted, the second end of the two-shouldered lever is made in the form of a fork, the pushers are placed in guides with the possibility of reciprocating movement, and the pusher with two fingers is placed in the guide mounted on the carriage, one of the fingers of this pusher is placed in the fork of the two shoulders of the lever, and the other finger and finger horn pusher - in

groove drove

Salient features, i.e. new properties of the claimed combination of features are the following:

supplying the device with a carrier containing a rectilinear groove along the diameter of the carrier and mounted in the device body with the possibility of rotation around its axis, the presence of two copy rollers interacting with the cam, and fixing both rollers on the pushers placed in parallel with the possibility of longitudinal movement in guides and containing fingers placed in the carrier groove, due to the oscillatory movement of the carrier that occurs when the profile cam rotates, the burner returns in the absence of stroystv ozratnoy spring;

the implementation of the free end of the two shoulders of the lever with the burner in the form of a fork and the placement of an additional finger in it, fixed to the end of the push rod, passing in the guide mounted on the carriage, allows the lever with the burner to oscillate due to the rotation of the cam at different given amplitudes of the oscillations of the burner;

placing one of the cam follower pushers in a guide carriage mounted to move the amplitude change mechanism in the guides, as well as the fingers of this pusher in the fork of the two shoulders of the lever with the burner and in the carrier groove, changes the amplitude of oscillations during burner oscillations, and also concern for the device at various values of the amplitude of the oscillations.

The combination of these distinguishing features communicates a new property of the device, eliminates the need for a return spring and provides the same speed of movement of the torch on both sides of the vibrations and improves the quality of welding.

In FIG. 1 presents the proposed device; on fm 2 - section AA in FIG. 1; in FIG. 3 is a kinematic diagram of the operation of the device.

The device consists of a housing 1 mounted on the actuator 2 of the cam 3 by means of a tangential clamp 4. The cam 3 is made in the form of a truncated cylinder, the section plane of which is inclined to the axis of its rotation at angles a. A two-arm lever 5 is mounted in the casing, carrying a welding torch 6 on one shoulder, and the free shoulder is made in the form of a plug 7. In the casing there is a mechanism 8 for changing the amplitude of vibrations, containing a movable arm E placed in

and

10

fifteen

0

5

0

5

0

5

0

guides 10 and adjusting screw 11 The device has a fixed guide 12 and a guide 13 mounted on the carriage 9. A carrier 15 is mounted on the axis 14 in the housing, which has a diametrical groove 16, Parallel pushers 17 and 18 are placed in the guides 12 and 13 , at the ends of which are copied rollers 19 and 20. On the opposite ends of the pushers mounted fingers 21 and 22, placed in the groove 16 of the carrier 15, and on the pusher 17 mounted a second finger 23, located in the fork 7 of the two shoulders of the lever 5. To ensure installation devices to his body with 1 made detachable.

The device operates as follows

The drive 2 with the cam 3 is pushed into the housing 1 until the end surface of the cam comes in contact with both rollers 19 and 20, is pressed against them until a possible play in the joints is selected and fixed in this position by the clamp 4. The profile cam 3 synchronously acts on the copiers during its rotation rollers 19 and 20, through them to pushers 17 and 18, which are kinematically connected to each other by means of fingers 21 and 22 and carrier 15, in which groove 16 are placed fingers. A system consisting of two parallel pushers 17 and 18, the end surface of the cam 3 and the straight groove 16, can be considered as a parallelogram (a b c d) with hinges at the points of contact of the cam with the copy rollers 19 and 20 and fingers 21 and 22 with a groove of 16.

Therefore, when the cam 3 is rotated, the carrier swings by an angle 2 ", which is equal to the two angles of the bevel of the cam 3, and the pusher 17 reciprocates along its axis and, by means of the finger 23 located in the fork 7 of the two-arm lever 5, oscillates the welding torch 6. The magnitude of the amplitude of the oscillations of the end of the electrode of the burner A depends on the radius of vibrations R, the length of the free shoulder of the two shoulders of the lever 5 and the stroke of the follower 17 equal to mimi bidi 2r, tg ".

From the circuit shown in FIG. 3. it can be easily established that mi mi A

2 R

1 R

Hence A tttm-p 2 g tg a

R U

55 When moving the carriage 9 with the guide 13 and the follower 17 along the guides 10 of the oscillation amplitude changing mechanism, the roller 19 moves along the cam surface from point b to point o, with

In this case, the magnitude of the oscillation amplitude varies from maximum to zero.

Thus, the proposed device provides oscillations of the burner using a cam without a return spring, the same oscillation speed in both directions, and also reduces the power of the electric drive motor of the oscillation mechanism. The use of the device improves the quality of welding.

Claims (1)

SUMMARY OF THE INVENTION A device for welding with welding gun oscillations, comprising a drive, a cam fixed to the output shaft, in contact with an end face of which is a carbon roller coupled via a two-shoulder screw mechanism mounted to the oscillator mounted thereon a lever at one end of which a burner is fixed, characterized in that. to improve welding quality by providing 0 5 0 no equal speed of the burner in both directions of its oscillations, it is equipped with a carrier in the form of a rotary disk with a diametral groove, a second tracer roller in contact with the cam, two guides, one of which is fixed, and the other is mounted on the carriage of the amplitude control mechanism , with two parallel pushers, one of which is made with one finger on one of its ends, the other with two, and carbon rollers are mounted on the opposite ends of the pushers, the second end of the two-shouldered lever ha is made in the form of a fork, the pushers are placed in the guides with the possibility of reciprocating movement, the pusher with two fingers placed in the guide mounted on the carriage, one of the fingers of this pusher is placed in the fork of the two shoulders of the lever, and the other finger and the finger of the second pusher placed in the carrier groove. FIG 2 $ game 5