SU1279775A1 - Machine for resistance butt welding - Google Patents

Abstract

The invention relates to the area of flash butt contact welding, and can be advantageously used in welding rod billets of steel with a high melting point close to the melting point of the elements for deburring. The aim of the invention is to increase the durability of the cutting elements by insertion. them from the welding zone during the heating process. In the process of heating the joined blanks, the cutting elements 5 mounted on the guides 4 in the collars 2 and 3 are outside the heating zone. After heating, the cages 2 and 3 are shifted towards each other. In this case, the beveled surfaces 15 of the current leads 1 interact with the corresponding beveled edges 14 of the cutting elements 5. Under the action of the drives of the reflow mechanisms and with the S5 drafts of the current leads, together with the cutting elements, shears and cuts the resulting burr. When the clamps 2 and 3 are bifurcated, the cutting edges of the cutting elements tear the burr ring. 3 il.

Description

The invention relates to butt contact electrowelding of bar products, for example, reinforcing steels for the manufacture of reinforced concrete structures, with the removal of burr formed during the electric welding process. The device can be used predominantly when welding blanks of steel with a high melting point, close to the melting point of the elements for deburring.

The purpose of the invention is to increase the durability of the cutting elements by removing them from the welding zone during the heating process.

FIG. 1 shows a schematic of the device at the time of heating of the joined reinforcing bars; in FIG. 2 the same, at the moment of cutting grata in FIG. 3 - cutting element, axonometer.

The device contains detachable drawers 1 and a mechanism for removing the bur, made in the form of clips 2 and 3, having the possibility of reciprocating translational motion (power cylinders are not shown) with quick-detachable guides 4 (quick-detachable unit not shown), on each of which interchangeable cutting elements 5 are installed, mutually movable along guides 4 and separated by a spring 6 and their relative expansion is limited by adjustable stops 7. Each cutting element 5 is made in the form of a block with a through hole 8 for installation in The guides 4, has a groove 9 in accordance with the profile of the joined reinforcing rods 10 and 11, bounded by the profile 12 and the straight 13 cutting edges, and has a beveled thrust face 14, in accordance with which the bevel of the frontal surface 15 of each current supply 1 is made welding machine.

A set of interchangeable, depending on the diameter d of the welded reinforcing bars 10 and 11, the cutting elements 5 has the same height h and the corresponding value b determined from the expression

b 1, sl- (1pl + U

- installation length, distance from the edge of the electrodes to the corresponding end of the spliced reinforcing bars 10 and 11,

where 1

"Ate

five

five

0

five

0

0

five

1o is the magnitude of fusion, 1 is the amount of sediment.

five

The device works as follows.

In accordance with the diameter of the welded reinforcing bars 10 and 11, cutting elements 5 are installed in the guides 4, their position is adjusted by adjustable stops 7 in accordance with the position of the current leads 1, and during heating of the ends of the joined reinforcing bars 10 and 11 the cutting elements 5 are TC outside the heating zone. Being ahead of the welding cut-off, the sleeves 2 and 3 are shifted, as a result of which the cutting pros, the full edges 12 of the cutting elements encompass the welded rods 10 and 11 along the perimeter, which are mutually shifted in the process by power drives moving the current leads 1, the bevelled front surfaces 15 of which in contact with the beveled stop faces 14 of the cutting elements 5, the burr 16 is cut off, and the straight cutting edges 13 cut the burr ring 16. When the clips 2 and 3 are opened, the cutting edges 1.12 and 13 of the cutting element 5 break the cut th burr ring 16 and by a spring 6 rezhush -: elements 5 along the rails 4 are diluted to the original position. I

The use of the proposed device for welding steel billets with a high melting point close to the melting TeMneipaType - cutting elements does not cause rapid wear of the cutting edge of the latter, which reduces the need for their frequent change and, ultimately, reduces the metal consumption and increases the productivity of the welding machine.

Claims (1)

The invention relates to butt contact electrowelding of bar products, for example, reinforcing steels for the manufacture of reinforced concrete structures, with the removal of burrs formed during the electric welding process. The device can be used predominantly in the welding of blanks of steel with a high melting point, close to the melting point of the elements for deburring. The purpose of the invention is to increase the durability of the cutting elements by removing them from the welding zone during the heating process. FIG. 1 shows a schematic of the device, at the time of heating of the joined reinforcing bars; in FIG. 2 the same, at the moment of cutting grata in FIG. 3 - cutting element, axonometric. The device contains detachable heads 1 and a deburring mechanism, made in the form of sleeves 2 and 3, having the possibility of backward movement (power cylinders not shown) with quick-release guides 4 (quick-release unit not shown), each of which has replaceable cutting elements 5, mutually movable along equal 4, and separated by a spring; 4, has a groove 9 in accordance with the profile of joined reinforcing rods 10 and 11, limited to the profile 12 and straight 13 cutting edges, and has a beveled thrust face 14, in accordance with which the bevel of the frontal surface 15 of each current supply 1 of the welding cars. A set of interchangeable, depending on the diameter d of the welded reinforcing bars 10 and 11, cutting elements 5 has the same height h and the corresponding value b, determined from the expression b 1, sl- (1pl + U is the installation length, distance from the edge of the electrodes to the appropriate end of the docking reinforcing bars 10 and 11, 1o - the amount of melting, 1 - the amount of sludge. The device works as follows.In accordance with the diameter of the welded reinforcing bars 10 and 11, cutting elements 5 are set in the guides 4, adjustable by stops 7 their position is tied in accordance with the position of the current leads 1, and during the heating of the ends of the joined reinforcing bars 10 and 11. the cutting elements 5 are outside the heating zone .Taking ahead of the switching off of the welding current, the sleeves 2 and 3 are shifted, resulting in cutting blades, fresh edges 12 along the perimeter of the cutting elements, the welding rods 10 and 11, the displacements displaced in the process, by power drives, move the current leads 1, whose oblique frontal surfaces 15 of which are in contact with the oblique thrust edges 14 of the cutting elements 5, cut the resulting burr 16, and the straight cutting edges 13 cut the burr ring 16. As the clips 2 and 3 move apart, the cutting edges 1.12 and 13 of the cutting element 5 break the burnt burr ring 16 and under the action of the cutting spring 6: elements 5 guide 4 is diluted to its original position. I The application of the proposed device when welding steel blanks with a high melting point, close to the TeMneipaType of melting - cutting elements, does not cause rapid wear of the cutting edge of the latter, which reduces the need for their frequent change and, ultimately, reduces the metal consumption and increases the productivity of the welding machine . Claims butt welding machine comprising detachable current leads, a reflow and deposit mechanism and a deburring mechanism with cutting elements, characterized in that, in order to increase the durability of the cutting elements by removing them from the weld zone during the heating process, the deburring mechanism made in the form of current leads mounted on opposite sides of the connector plane with the possibility of moving cages towards each other with quick-detachable guides mounted on them removable cutting elements that are spring-loaded relative to each other, and adjustable stops for moving the cutting elements along the guides, the current leads are made with bevels on the sides facing the working area, and the cutting elements are with bevels corresponding to the bevels of the current leads and a groove for covering the product.