SU1593836A1 - Machine for butt resistance welding - Google Patents

Abstract

The invention relates to flash butt welding equipment and can be used in various tires of welding machines, on which welding is carried out by the method of reflow, in various industries. The purpose of the invention is to reduce the cleaning time of the spark shield from sparks and splashes of molten metal and use a spark shield to act as a dilution drive for the machine columns. The machine contains movable and fixed columns with clips, spark shield. The spark shield is made in the form of at least one split ring mounted on the machine electrically insulated from the clamps on their ends. One end of the split ring is mounted on a movable column, and the other on a fixed one. The spark shield can be made in the form of several split rings. Split rings at the same time set around the longitudinal axis of the clamps of both columns of the machine. The arcuate edges of the split rings are overlapped relative to each other. The spark shield is made of spring material. The stiffness of the shield is chosen to overcome the friction forces in the guides of the moving column. The use of the shield reduces the cleaning process of the machine from splashes and simplifies the drive of the dilution of the columns by eliminating additional components from the design. 2 hp ff, 2 ill.

Description

The invention relates to equipment for flash flush welding and can be used in various types of welding machines, which are reflowed from above, in various industries of the industry.

The purpose of the invention is to reduce the cleaning time of the spark shield from sparks and splashes of molten metal:

and the use of a spark shield as a dilution drive for columns

FIG. 1 shows a device for protecting resistance butt welding machines from sparks and metal splashes; FIG. 2 shows the position of the spark-proof device with the columns of the contact machine divorced to the initial position.

The device (shield) to protect the contact butt welding machines from

sparks and splashes of molten metal is a flexible plate 1, shaped in the form of a split ring with a diameter with parallel bent edges to allow the device to be fixed through electrically isolating the gasket 2 to the lower jaws of the movable 3 and fixed 4 columns of the contact machine. When melting parts 5 clamped in the jaws of the machine, a significant amount of sparks and splashes of molten metal 6 are formed, which, falling on the inner surface of the nekrozaschitny shield, form a hard crust 7 After welding, the welded product is removed from the clamping jaws of the machine, and the machine columns are moved to their initial position. With the machine columns (figo 2), the flexible plate 1 will change its geometry and the hard crust 7 from sinter sparks and splashes of molten metal will not change. its shape is separated from the surface of the flexible plastine 1 and can be removed by the operator

If it is necessary to protect the machine from splashes of metal flying out in directions that it is impossible to close with a linear shield, the device is mounted from several plates with overlapping gaps between them in the direction of the spray from a spark gap

The use of this shield design significantly simplifies and shortens the cleaning process of the welding machine and the splash shield of molten metal. Splits of metal between themselves are easily removed from the surface of the spark protection plates when the machine’s fixed and fixed columns are separated with almost no special tools (chisels metal shields, scrapers), and small individual sprays are blown off by a stream of air that is fed in between;

The movement of a moving column of a flash-butt welding machine can be simplified if the rigidity of the spark protection device is ensured so that the shield deformation energy during the displacement of the movable column during welding exceeds the energy required to dilute the columns of the contact machine to the stop. Dilution force P that occurs during deformation (figo) the flap is calculated by the formula

h- b. cf ..

R

4.5-Gu

wed

0

five

0

five

0

five

0

five

0

five

where e h

b

cf. l-

elastic modulus; shield material thickness

CMJ

shield width, cm; value equal to

CMJ

average ring diameter, cm; the gap between the bent edges of the flap after welding is completed

gap between the bent edges - the shield in the initial state of

If, when calculating a sparkproof shield, its rigidity is ensured that, when deformed sh -1tk, the force of its dilution would be greater than the force holding the moving column of the machine in the extreme forward position (friction force), then the machine does not need to drive the dilution of the columns, which greatly simplifies drive of the contact machine and reduces its cost fb rmula from

1c A butt welding machine containing movable mounted on guides5 and non-susceptible columns with clamps, as well as necrosis protective, characterized in that, in order to reduce the time to clean the spark shield from sparks and splashes of the molten metal, the sparkproof shield is made the form of at least one split ring mounted at one end at the end of the clamp of the movable column, and at the other end at the end of the clamp of the fixed column and electrically insulated from the clamp

2o Car pop.1, ex. the fact that the spark shield is made in the form of several split rings, is installed: x around the longitudinal axis of the clamps overlap relative to each other

Zo The machine according to lpo1 and 2, characterized in that, in order to use as a drive, the dilution of the columns of the machine is spark-proof

Claims (3)

Fo'rmul a 'from obr br 1. A flash butt welding machine, comprising a movable, mounted on rails and a fixed column, with clamps, as well as an spark shield, characterized in that, in order to 'reduce the time for cleaning the spark shield from sparks and splashes of molten metal, spark shield is made in the form of at least one split ring mounted at one end of the clamp end of the movable column, and the other at the end of the clamp of the fixed column and insulated from the clamps. 2. The machine according to π.1, characterized in that the spark shield is made in the form of several split rings mounted around the longitudinal axis of the clamps overlapping relative to each other. 3. The machine according to claims 1 and 2, characterized in that, in order to use the spark protection machine ^ - shield as a column breeding drive, the spark protection shield is made of spring material with a stiffness exceeding the friction force in the guides of the movable column.