JPH08293B2 - Work positioning device for automatic grating welding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the development of a pair of work holders which can be moved forward and backward and which is provided in a grating welding apparatus. It depends on.

[0002]

2. Description of the Related Art As shown in FIG. 8, each of the grating raw materials c manufactured by pressure welding the twist bars b arranged substantially at right angles to each other, for example, at intervals of 100 mm, on a large number of slabs a arranged at substantially constant intervals. A plate W is cut between arbitrary twist bars b to a substantially constant length to produce a grating material e of FIG. 9, and side plates f, f are applied to both cut end surfaces of the work W to be temporarily fixed, An apparatus for welding the side plates f, f to both cut ends of all the vertical plates is known, for example, from Japanese Patent Application Laid-Open No. 3-77778, 266376, 268872. The grating raw material c and the work W can be mass-produced, but the work W does not have a precisely cut length of each vertical plate a and may be exaggeratedly expressed as a trapezoid, which is a neck. It becomes impossible to efficiently weld a large amount.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been developed as an improvement of the above-mentioned known welding device, in which a pair of work holders, which are provided in a grating welding device and are movable at least one of them by a hydraulic device, are movable back and forth. The purpose of the present invention is to develop a new work W positioning device adapted to this.

[0004]

The workpiece positioning device of the automatic grating welding machine of the present invention meets the above-mentioned object, and is provided with a grating welding device, and at least one of them is fed by a hydraulic device. Between a pair of movable work holders, a conveyor for the work W, a lifting mechanism for the work W arranged on both front and rear sides of the conveyor, and a ruler for determining the height of the work W provided in each work holder. , The work W is fed between the work holders by the conveyor, and then is lifted by the lifting mechanism until the upper surface of the work W hits the height ruler, and at least one of the work holders is fed by a hydraulic device. The work W is sandwiched and fixed by both work holders, and connecting arms are provided between both work holders. Are other nothing more is constructed by focusing on that there is present Shinano spatial portion.

[0005]

The present invention is

[0010]

As described in the operation of the embodiment, the work W is transferred to the work transfer device (conveyor 31) and the lifting mechanism 33.
And a ruler 30, at least one of which is fixed by sandwiching it between the inner surfaces of a pair of work holders 3 and 3 which can be moved back and forth so as to be fed by a hydraulic device, and then each grating welding of the work holders 3 and 3. Welding is performed with the tools 21 and 21.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The attached drawings show an embodiment of the present invention.
1 is a plan view, FIG. 2 is a side view, FIG. 3 is an enlarged side view of FIG. 1A-A line, FIG. 4 is a front view of FIG. 2B-B line cut, and FIG. 5 is a cylinder 18 shown by cutting the work holder 3. And a side view of the piston 9 and the like fitted in the cylinder, FIG. 6 is a perspective view of the second traveling block of the grating welding machine 21, and FIG. 7 is one end of the guide of the second traveling block of the grating welding machine and the first traveling block. 8 is a front view of a spring arranged on the surface of the first traveling block, FIG. 8 is a plan view of a grating raw material, and FIG.

Reference numeral 1 denotes a grating welding apparatus of the present invention, which is provided with a pair of front and rear work holders 3, 3 on a machine base 2. The work holders 3 and 3 are fixed between the moving side plates 25 that slide along the grooves 2a on both outer side surfaces of the machine base 2, and the left and right ends are in contact with both upper surfaces 2b of the machine base 2 to move the side frames. It moves with 25. A plurality of holding pieces 4 and 5 are fixed to the front and rear surfaces of the machine base 2, and the holding pieces are pierced to hold the nuts 6 and 7 rotatably. In the work holder 3 on the front side, as shown in FIG. 5, a piston 9 provided at the tip is fitted in a cylinder 18 provided in the holder 3, and an extension screw 10 provided in a rod 8 of the piston 9 is attached to the holding piece 4. It is screwed to the nut 6 of. In the work holder 3 on the rear side, a nut 7 is screwed into a screw 12 which is rotatably fitted around the center of a solid fitting piece 11 which is firmly fitted to the holder 3. Although the work holder 3 on the rear side moves back and forth, this embodiment does not move it when positioning the work W, so it does not matter if there is no cylinder. Provide if necessary. A timing pulley 13 on which an interlocking timing belt 17 is hung is provided inside all the nuts 6 and 7, a bevel gear 14 is provided outside the nuts 6 and 7 on the front side in FIG. 1, and bevel gears 16 of the handles 15 and 15 are provided respectively. , 16 are engaged with the bevel gear 14, and the front and rear nut members 6, 7 are interlocked with each other. The cylinder 18 has oil supply / discharge passages 61, 62 before and after the piston 9.
To provide.

A frame member 24 constituting a moving space 23 for moving the welding member 22 of the grating welding device 21 is fixed to the corresponding inner surfaces of the work holders 3 and 3. Each frame member 24 is composed of moving side plates 25 (described above) at both ends of each work holder 3, 3 and a frame plate 26 between the side plates 25, and left and right guide rails 27, 27 are provided on the front surface of the frame plate 26. A ruler 30 for fixing the work W is provided on the lower surface of the frame plate 26.

The front and rear work holders 3 and 3 are provided with respective handles 15 according to the front and rear widths of the work W to be welded,
15 is rotated to roughly align the front and rear of the machine base 2 with the moving side plate 25. A pair of conveyors 31 (work transfer device) such as an endless chain that carries the work W between the work holders 3 and 3 and conveys the work W to a predetermined position on the lower surface of the ruler 30.
1, 2 and 4 are provided on the conveyor support pieces 32 extending to the left and right of the machine base 2, and the work W lifting mechanism 33 is arranged on both front and rear sides of each conveyor 31. Lifting mechanism 3
Three hydraulic cylinders 35 are provided at the lower part of the moving space 23 and fixed to the mounting pieces 34 that are respectively fixed and projected to the lower surfaces of the work holders 3 and 3, and the respective cylinders 3 are provided.
And a horizontally long pillow 37 supported by a rod 36 of No. 5.

As shown in FIG. 1, the grating welding device 21 is provided independently for each of the front and rear work holders 3, 3 and is fitted to the guide rail 27 as shown in FIG. 3 and driven by the reversible motor 41. The first traveling block 4 connected to the traveling portion below the timing belt 42 (see FIG. 4)
3 (FIGS. 3 and 7) and a second traveling block 47 that integrally slides in the left-right direction together with the torch 45 and the holding piece 44 of the carbon dioxide blowing pipe 46. The second traveling block 47 is fixed to the holding piece 44 and extends in the left-right direction. The expansion spring 51 of FIG. 7 is hooked on the second spring hooking piece 50 protruding from the rear end portion of the projecting piece 48 and the first spring hooking piece 49 protruding from the first traveling block 43.

Reference numeral 52 is a mounting piece 53 on the second traveling block 47.
Is a stopper device fixed by means of a cylinder 54 on the upper side of the mounting piece 53 and a guide tube 55 on the lower side.
6 is projected onto each side surface of the vertical plate a of the work W until the welding is completed. Torch 45 and carbon dioxide blowing pipe 46
And the stopper device 52 constitute the welding member 22 of the above-mentioned grating welding device 21. Grating welding machine 2
Reference numeral 1 is for welding both cut ends of each vertical plate a of the work W and the side plates f, f. The present invention relates to a work positioning device before welding is performed. Is omitted.

In this embodiment, as described above, the work holders 3 and 3 are roughly positioned in accordance with the front and rear width of the work W, and the work W and the work transfer device (conveyor 31) are used to provide a space between the work holders 3 and 3. It is transported and stopped at a predetermined position, and is lifted by the lifting mechanism 33 at about the same speed, and is lifted until the upper surface of the work W hits the ruler 30. However, since the lifting of the work W by the lifting mechanism 33 is not the final positioning, the work W is not strongly sandwiched between the ruler 30 and the pillow 37, but a slight gap is formed.

After the upper surface of the work W is abutted against the ruler 30 by the lifting mechanism 33 to perform the upward positioning, pressure oil is fed from the oil feed / discharge passage 61 on the front surface of the piston 9 of the cylinder 18. At this time, the rear work holder 3 is immovable, and the piston 9 fitted in the cylinder 18 of the front work holder 3 does not move either. Therefore, the front work holder 3 is pushed by the pressure of the pressure oil, and the rear work holder 3 is pushed. Holder 3
The work W moved in the direction of and pushed up by the lifting mechanism 33 is sandwiched and fixed by the front and rear work holders 3, 3. Since the grating material e has a trapezoidal shape, even if the side plates f and f are not parallel to each other, the work holder has a margin to be non-parallel, which does not hinder welding as in the conventional case.

[0014]

According to the work positioning device of the automatic grating welding machine of the present invention, a pair of work holders 3 and 3 that can be moved back and forth, at least one of which is fed by a hydraulic device.
Between the front and rear sides of the welding material to be welded e, the work transfer device (conveyor 31) for the work W, and the lifting mechanism 33 for the work W arranged on both front and rear sides of the transfer device. , A ruler 30 for determining the height of the work W provided in each of the work holders 3 and 3, the work W is fed between the work holders 3 and 3 by the work transfer device (conveyor 31), and then, The work W is lifted by the lifting mechanism 33 until it hits the height-determining ruler 30, and at least one of the work holders 3, 3 is fed by a hydraulic device to clamp and fix the work W by both work holders, and grating welding is performed. Positioning for welding by the vessel 21 is performed, and there is no need for connecting the front and rear work holders 3 and 3, and there is no need for connection. Since each of them is independent, the work transfer device (conveyor 31) and the lifting mechanism 3
There is no obstacle to the installation and formation of the positioning member essential to the configuration of the present invention, such as the ruler 30 and the ruler 30.
There are other effects such as being able to be performed without any hindrance.

[Brief description of drawings]

 The attached drawings show an embodiment of the present invention,

FIG. 1 is a plan view,

FIG. 2 is a side view,

FIG. 3 is an enlarged side view of FIG. 2A-A line,

FIG. 4 is a front view taken along the line BB of FIG.

5 is a side view of a cylinder 18 shown by cutting the work holder 3 and a piston 9 and the like fitted in the cylinder, FIG.

FIG. 6 is a perspective view of a second traveling block and the like of the grating welding device 21,

FIG. 7 is a front view of a spring arranged on the surface of the first traveling block extending from one end of the guide of the second traveling block of the grating welding machine to the first traveling block;

FIG. 8 is a plan view of a grating raw material,

9 is a separated perspective view of the work W, FIG.

[Explanation of symbols]

W → Work 1 → Grating welding device 2 → Machine stand 2a → Groove 2b
→ Top surface 3 → Work holders 4, 5 → Holding pieces 6, 7 → Nut 8 → Rod 9 → Piston 10 → Extension screw 11 → Solid fitting piece 12 →
Screw 13-> Timing pulley 14-> Bevel gear 15-> Handle 16-> Bevel gear 17-> Interlocking timing belt 18
→ Cylinder 21 → Grating welder 22 → Welding member 23 → Moving space 24 → Frame material 25 → Moving side plate 26 → Frame plate 27 → Guide rail 28
→ Support piece 29 → Guide rod 30 → Ruler 31 → Conveyor (work transfer device) 32 → Conveyor support piece 33 → Lifting mechanism 34 → Mounting piece 35 → Hydraulic cylinder 36 → Rod 37 → Pillow piece 41
→ reversible motor 42 → timing belt 43 → first traveling block 4
4 → Holding piece 45 → Torch 46 → Carbon dioxide blowing tube 47 → Second traveling block 48 → Projecting piece 49 → First spring hooking piece 50 → Second spring hooking piece 51 → Expansion spring 52 → Stopper device 53 → Mounting piece 54 → Cylinder
55 → guide pipe 56 → stoppers 61, 62 → sending / exhausting oil pipe

Claims (1)

[Claims] 1. A work transfer device for a work W, wherein a side plate is applied to both front and rear sides of a welding material to be welded between a pair of work holders which can be moved back and forth, at least one of which is fed by a hydraulic device. The lifting mechanism for the work W arranged on both front and rear sides of the transfer device, and the ruler for determining the height of the work W provided in each work holder,
The work W is sent between the work holders by the work transfer device, then the work W is raised by the lifting mechanism until it hits the height ruler, and at least one of the work holders is sent by a hydraulic device. A work positioning device for a grating automatic welding machine, characterized in that a work W is pinched and fixed by a work holder.