JPH0324308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention <Field of Industrial Application> The present invention relates to an apparatus for manufacturing a cylindrical body such as a compressor air reservoir body.

<Prior art> The compressor air reservoir body is rectangular, or a rectangle with a protruding part where the opposite side protrudes more than the adjacent side (see Figures 2 and 3), and then the opposite sides are overlapped or butted together and seam welded or arc-welded. It is welded and finished to the required dimensions. This invention uses seam welding, especially crush seam welding.
This has the effect of reducing the thickness of the lap weld, but
Welding deformation is large, especially near both ends of the weld line. Therefore, after welding, both ends that have been significantly deformed are cut off, and protrusions m for cutting off are attached to both ends of the seam as shown in Figures 4 and 5.

The welded parts of the rolled materials are precisely overlapped to form a mat.
Measures to prevent the seam welding electrode from moving during travel include using various jigs and clamps, or fixing the electrode in advance by temporary welding.

<Problem to be solved> The method of attaching protrusions to both ends of the weld line of the material and cutting it out after welding has excellent welding quality, but is not suitable for continuous welding and requires two cutting steps after welding. Therefore, it is considered to be a disadvantageous method in terms of efficiency. The main purpose of the present invention is to improve the efficiency thereof, and also to improve the conventional material clamping method of welding machines, which relies only on pressure and friction.

(2) Structure of the Invention <Means for Solving the Problems> The cylindrical body manufacturing apparatus of the present invention, which has solved the above problems, has a feeding path for successively feeding materials in which both ends of the lap seam protrude beyond the cylindrical body. , a pine seam welding machine installed along this feed path, a machine for loading and unloading material into this, a shearing machine for cutting both ends of the weld, a machine for loading and unloading material into this, and a machine for simultaneously polishing both sides of the weld. The material clamp of the above-mentioned pine seam welding machine is provided on the left and right pressure surfaces that clamp the body of the material from the outside over almost the entire length, and on both outer ends of each pressure surface, By hitting the edge of both side plates of the above-mentioned extra protruding part of the material and clamping it, the joint can be brought to the specified position, and the size and strength can be controlled to prevent expansion and movement in the direction perpendicular to the weld line during welding. It is characterized by having a lateral movement prevention member that has a lateral movement prevention member.

<Function> The above-mentioned feeding path is a so-called conveyor system that feeds the materials one after another to a pine seam welding machine, a shearing machine for welding edge cutting, a welding part double-sided polishing machine, etc., and the material loading and unloading machine automatically handles each Finish pressurizing. For the first time, the welding machine's material clamp utilizes a weld line extension protrusion to position the material and reliably prevent it from moving near the weld.

<Embodiment> FIG. 1 is a plan view showing a main part of an apparatus according to an embodiment of the present invention. In the figure, M is the above-mentioned material, 1 is its feeding path (conveyor), 2 is a pine seam welding machine,
Reference numeral 2a designates the material loading/unloading machine, 3 a shearing machine for cutting both ends of the welded part, 3a the material loading/unloading machine, and 4 a double-side polishing machine. From FIG. 8 onward, the material clamp 5 of the welding machine 2, its protrusion support member 5a, and the material M
The rotating clamping section 6 that sandwiches the body of the vehicle, and its approach/separation device 7 are shown.

As is well known, the material M is made by cutting a steel plate _M0 with protrusions m as shown in Figs. 2 and 3 and rolling it up as shown in Figs. 4 and 5. As in the case of weld W, the pine seam is welded and polished.

The details of the illustrated embodiment device will be explained together with its handling and operation. When the material M in the state shown in Figures 4 and 5 is placed on the right end of the feeding path 1 in Figure 1, it is fed to the left as shown by the arrow, with the well-known seam (not shown) directly above it. After passing through the device, it maintains that posture and is automatically stopped by a detection device directly in front of the welding machine 2. Alternatively, the material M can be captured by closing the open arm 21 of the material loading/unloading machine 2a without stopping. Then, when the material M is moved from the feeding path 1 to the grip position of the clamp 5 of the welding machine 2 by the fluid pressure cylinder 22, the left and right clamp arms that were open close and the material M is moved as shown in FIGS. 8 to 10. Place it in the correct position. This clamp 5
Both the left and right sides are of the toggle clamp type, and the solid line in FIG. 8 shows the state in which the fluid pressure cylinder 23 is pushed out and the link 24 is stretched linearly and clamped. When the fluid pressure cylinder 23 is pulled back, the link 24 is bent and the clamp 5 is opened as shown by the chain line on the left side of FIG. The upper pressing surface 5b of the clamp 5 presses and fixes both sides of the welded portion of the body of the material M toward the horizontal cylindrical jig 25 of the lower fixed electrode 20.

This clamp 5 is characterized by pushing the left and right protrusions m, which are the extensions of the welding line of the material M, from the left and right sides with lateral movement prevention members 5a as shown in FIGS. Its purpose is to control lateral movement in the direction perpendicular to the weld line due to expansion and crushing. The member 5a has the necessary dimensions and strength. The abdomen pressurizing surfaces 5c of the left and right clamps 5, 5 are also adapted to control the tendency of the body of the material M to expand. The upper rotating electrode 20a in FIG.
When welding the material M between the material M and the lower electrode 20 with a large pressure, the end of the protrusion m that is an extension of the material itself becomes irregular, but if this is cut off, a correct welded end can be obtained. The left and right movement due to thermal expansion and crushing of the welded portion is caused by the support members 5 at both ends of the clamp 5.
a, an upper pressure surface 5b, and an abdominal pressure surface 5c.

After the lap welding is completed in this manner, the material M is returned to the feed path 1 by the charging/unloading machine 2a. When it stops right in front of the next shearing machine 3, the loading/unloading machine 3a is equipped with a rotating clamping part 6 and an approaching/separating device 7, so
The barrel of the material M from the feeding path 1 is gripped by the opening/closing arm 31 of the rotating clamping part 6. Then, the material M is advanced and held by the approach/separation device 7 to the position shown in FIG. After the protrusion m on one side is cut off, the rotating clamping part 6 is horizontally rotated by 180 degrees to bring the protrusion m on the other side to the shearing position and cut out in the same manner.

Then, the approach/separation device 7 is pulled back, the arm 31 is opened, the material M is transferred to the feeding path 1 side arm of the loading/unloading machine 3aa, and the material M is lowered into a fixed position on the feeding path 1.

When the material M that has returned to the feed path 1 stops in front of the next double-side polisher, in this example, it is held by the left and right arms 41 hanging down from above as shown in FIGS. 13 and 14. Then, a pair of upper and lower stainless steel wire brushes 4a capable of simultaneously polishing the inner and outer surfaces of the welded portion move together with the main body of the polisher 4 to complete the polishing. After that, arm 41
is opened to the left and right, and the material M is sent to a tube expansion type shaping machine (not shown) to complete the body parts.

Although one embodiment has been described above, the present invention can be varied and applied in a variety of ways according to the practical conditions and well-known techniques of the designer, without changing the gist of the invention. The material feeding path 1 is not limited to a conveyor, and may be one in which a transport vehicle moves along a rail or a passage. In addition to welding machines, shearing machines, and polishing machines, processing machines include
For example, a machine dedicated to crushing the welded portion may be added, or a steel plate feeder as shown in Figs. 2 and 3, a bender for rolling the steel plate, etc. may be added to the starting end of the feed path to make it an integrated operation.

(3) Effects of the Invention The present invention is capable of achieving sufficient welding even when using a material having a protrusion m for welding line extension, which is not suitable for mass production in terms of efficiency, although it has excellent welding quality. It has been proven that productivity can be increased.

A welding machine, shearing machine, and grinding machine were installed along the material feed path, and a material loading/unloading machine was added to automatically proceed with each process, so the extra work of cutting out protrusions was efficiently automated. The reason why this method was considered troublesome in the past has been resolved.

In addition, by utilizing the protrusion, the lateral movement prevention member of the welding machine clamp positions the weld line at the same time as the clamp, and further controls uneven lateral movement due to thermal expansion and crushing of the welding part. from,
The accuracy of finished dimensions has been significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention;
Figure 3 is a plan view and elevation view of the material before rolling.
Figure 5 is a plan view and an elevation view of the rolled material, Figures 6 and 7 are a plan view and an elevation view of the material after welding, and Figures 8 and 9 are an elevation cross section of the material clamp of the pine seam welding machine. Figure 10 is an elevation view showing the support status of the protrusion support member of the clamp, Figure 11 is an elevation view showing the relationship between the shearing machine and the material, and Figure 12 is the same as the rotating clamping part. , side view of the approach/detachment device, 1st
Figures 3 and 14 are a front view and a side view of the double-sided simultaneous polisher. 1... Material feeding path, 2... Pine seam welding machine, 3... Shearing machine, 2a, 3a... Material loading/unloading machine, 4... Double-sided simultaneous polishing machine.

Claims (1)

[Scope of Claims] 1. A feed path for successively feeding material with both ends of the overlapped seam protruding beyond the cylindrical body, a pine seam welding machine installed along this feed path, and material loading thereto. Equipped with a loading/unloading machine, a shearing machine for cutting both ends of the welded part, a material loading/unloading machine for this, and a simultaneous polishing machine for both sides of the welded part, the material clamp of the above-mentioned pine seam welding machine can roughly cut the body of the above-mentioned material.ゞIt is provided with left and right pressure surfaces that are clamped from the outside over the entire length, and on both outer ends of each pressure surface. A cylindrical body manufacturing apparatus characterized by having a lateral movement prevention member having a size and strength capable of bringing the joint into a predetermined position and controlling expansion and movement in a direction perpendicular to the weld line during welding.