CN2119288U - Gas-pressure welding holder for reinforcing bar - Google Patents

Abstract

The utility model relates to an air pressure welding clamp for steel bars, which is composed of a movable clamp body, a static clamp body, guide shafts, a spring, a fixing clamp head, a movable clamp head, a puller bolt, etc. The air pressure welding clamp is characterized in that the movable clamp head and the fixing clamp head are in assembly and disassembly fit; the direction of puller force applied to the clamp heads and the direction of clamping force applied to steel bars through the clamp heads are on a straight line; the guide shafts are double balanced shafts. The utility model has the advantages of light weight, convenient operation, high aligning degree, etc. Besides, two steel bars to be welded by the air pressure welding clamp are stressed evenly, and the air pressure welding clamp can largely increase work efficiency and reduce labor intensity.

Description

Gas-pressure welding holder for reinforcing bar

The utility model belongs to the operating apparatus in the construction.

The patent that the utility model applicant applied for " reinforcing bar bonding machine " in 1986, the steel bar gas anchor clamps are also arranged in this machine, the tight-holding type anchor clamps of four line force way are adopted at the clamping position of these anchor clamps, version is seen Fig. 1, active chuck 1 is by 7 one-tenth link joints of the axis of guide 8 and fixed chuck, reinforcing bar to be welded is closely attached on the V-shaped groove piece on the fixed chuck 7, then active chuck 1 is inwardly rotated, the V-shaped groove piece 3 of active chuck 1 is adjacent to reinforcing bar, to insert in the hole of fixed chuck 7 sides by the pull bar 5 that bearing pin 4 and active chuck 1 connect again, put into the oblong aperture of pull bar termination with voussoir 6, with hammer that voussoir is urgent, so clamp a reinforcing bar to be welded.The other end at axle 8 has same another root of the clamp reinforcing bar to be welded of a cover, in the pressurization of axle 8 directions, two reinforcing bars is connected again, adds thermal weld then.This kind anchor clamps, find to have much room for improvement in practicality: when urgent wedge 6, quiet chuck and moving chuck are passed to power inboard separately vee-block respectively, and this two vee-block becomes four lines to contact (vee-block has certain thickness) with the reinforcing bar that is clipped in wherein.Because moving chuck 1 is that rotate relative to quiet chuck 7 in the axle center with the axis of guide 8 when fastening, so, direction by pull bar 5 reinforcings with apply the direction of clamping force not on a line by vee-block, both have one section arm of force, therefore there is a moment of torsion between reinforcing bar and contacted four lines of vee-block, making contacting between two vee-blocks and the reinforcing bar is uneven four line force-bearing situations, for example, may have only three-way stressed.Quiet, the moving chuck of one cover is arranged respectively at the axis of guide 8 two ends, clamp two reinforcing bars to be docked respectively, have uneven four line force-bearing situations separately, have influence on the aligning concentricity of two reinforcing bars to be welded, thereby have influence on the butt welding quality.

The purpose of this utility model is to provide a kind of above-mentioned moment of torsion that overcomes, and makes to become evenly stressed steel bar gas anchor clamps between vee-block and the reinforcing bar.

Formation of the present utility model is: wear quiet clamp at the axis of guide one end, the axis of guide other end wears moving clamp and piston seat successively, the part of the axis of guide between quiet clamp and moving clamp is with spring, the termination of quiet clamp and moving clamp has fixed chuck respectively, and there is the solid vee-block inboard of fixed chuck; Cooperate respectively on the fixed chuck of quiet clamp and moving clamp termination active chuck is housed, there is movable vee-block the active chuck inboard; There is puller bolt at the back side of this activity vee-block.The assembling mode of fixed chuck and active chuck is: the both sides of fixed chuck termination have guide groove respectively, there is the guide rail that matches with guide groove on the fixed chuck both sides of the first end of live splint, this guide rail is contained in the guide groove of fixed chuck, in other words, active chuck 10 can separate from fixed chuck 8.8 one-tenth mounted and removable cooperations of active chuck 10 and fixed chuck, the movable assembling of both one-tenth.During welded reinforcement, reinforcing bar is leaned against in the V-shaped groove of the fixedly vee-block in the quiet chuck, the inferior guide rail that will move on the chuck is installed in the guide groove on the chuck in meditation, two reinforcing bars like this are contained in the vee-block of quiet, the moving clamp that is arranged in quiet clamp and moving clamp end respectively, make two reinforcing bar end faces relative, with the movable vee-block of puller bolt roof pressure, clamp reinforcing bar, heat the reinforcing bar two ends to uniform temperature with combustion gas, on piston seat 5, add individual and the equidirectional pressure of the axis of guide with hydraulic press again, moving clamp is drawn close to quiet clamp, and the spring compression welds together two reinforcing bars.Remove hydraulic coupling, spring reset, moving chuck resets.Unclamp jack unit, active chuck is taken off from fixed chuck, and take off welding clamp.

During the welding pressurization, bear big pressure on the axis of guide, the prior art axis of guide adopts the single shaft form, be easy to bend by pressure, influence two reinforcing bars aligning concentricitys to be welded and welding quality, the utility model axis of guide and have two, can improve above-mentioned crooked situation greatly, that twin shaft wears is quiet, moving clamp and movable obturating plug.

This gas pressure welding anchor clamps following advantage of having compared with the former weld jig of applicant: the first, by the roof pressure bolt directly to the vee-block reinforcing, afterburning direction and vee-block to resultant direction that reinforcing bar applies on same straight line, there is not moment of torsion between four lines that reinforcing bar contacts with vee-block, improve between two reinforcing bars and aim at concentricity, improve the butt welding quality.Second, active chuck and fixed chuck are by guide rail, the movable installation of guide groove, during the clamping reinforcing bar, anchor clamps to be carried with hand earlier early stage in installation, aim at a side of reinforcing bar, this moment, active chuck can take off from fixed chuck, alleviated clamp weight so greatly, reduce the labour intensity of carrying anchor clamps, improve work efficiency; The 3rd, the axis of guide is designed to parallel twin shaft form, when the welding pressurization, reduces the offsetting between axis of guide flexural deformation butt welding reinforcing bar greatly, improves the butt welding quality.In the utility model, the vee-block in the moving chuck also can be designed to bar shaped, makes reinforcing bar become three-way stressed mode.

Fig. 2 is front view of the present utility model and left view, and broken section is wherein arranged.Among the figure, 1 is quiet clamp, and 2 is the axis of guide, and 3 is spring, and 4 are moving clamp, and 5 be piston seat, and 6 for being fixed in piston seat on the nut of the axis of guide, and 7 are fixing vee-block, and 8 is fixed chuck, and 9 is movable vee-block, and 10 is active chuck, and 11 is the bolt of roof pressure activity vee-block.

Manipulating of these anchor clamps in top explanation.The reinforcing bar plus-pressure is 400kg/cm ², weldable steel muscle diameter is at φ 16mm to φ 40mm, and force (forcing) pump uses the applicant to produce pump in batches, and heating gas is oxygen and acetylene gas, the spout heater that adopts the applicant to produce.

Claims (2)

1, steel bar gas anchor clamps, its formation is: the axis of guide 2 one ends wear quiet clamp 1, the axis of guide 2 other ends wear moving clamp 4 and piston seat 5 successively, the part of the axis of guide 2 between quiet clamp 1 and moving clamp is with spring 3, the termination of quiet clamp 1 and moving clamp 4 has solid type chuck 8 respectively, and there is fixedly vee-block 7 inboard of fixed chuck 8; Cooperate respectively on the fixed chuck 8 of quiet clamp 1 and moving clamp 4 terminations active chuck 10 is housed, there is movable vee-block 9 active chuck 10 inboards, and there is puller bolt 11 at the back side of vee-block 9; Feature of the present utility model is that the both sides of fixed chuck 8 terminations have guide groove respectively, and there is the guide rail that matches with guide groove on the fixed chuck 8 both sides of active chuck 10 1 ends, becomes mounted and removable cooperation between active chuck 10 and the fixed chuck 8.

2, by the described gas pressure welding anchor clamps of claim 1, it is characterized in that the said axis of guide has two.

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