JPH04104288U - Automatic welding machine for ready-made piles - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce welding time, improve construction efficiency, and reduce costs. [Structure] A driving trolley 5 is movably attached to a guide rail 4 fixed on the outer periphery of a pile 1. The welding carts 6 are connected to the front and rear of the driving cart 5 through connecting fittings 11 and 12 in the running direction, and one or more welding torches 39 are attached to each welding cart 6.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an automatic welding machine that automatically welds prefabricated piles that are joined above and below. The welding torch attached to the welding cart connected to the cart is rotated around the joint. This invention relates to an automatic welding machine for welding.

0002

[Conventional technology]

Conventionally, the method of welding piles is multi-layer welding using a semi-automatic or fully automatic welding machine. Generally speaking, in multi-layer welding of piles, the joints of the upper and lower piles are butted against each other. Around the weld groove created by Build up the first layer of weld metal by rotating the attached arc welding torch. Weld around the entire circumference, then rotate the single arc welding torch around the groove again. While rotating, overlap the first layer of weld metal and apply the second layer of weld metal all the way around. Currently, welding is a multi-step process that involves several steps.

0003 However, in such multi-step welding, arc welding torque is required for one multi-layer welding. The welding slag that forms on the surface of the first layer after welding is removed. This involves removing the welding material, adjusting the position of the welding torch, and then welding the second layer. Therefore, there was a problem that welding work was complicated and time-consuming, and work efficiency was poor.

0004 For this reason, the applicants first installed a drive carriage on the guide rail installed around the pile. A torch trolley connected to the Install multiple arc welding torches at predetermined intervals in the direction of the The arc welding is rotated around the groove of the pile joint, and the arc welding is located in front of the groove in the direction of rotation. Before the welding slag welded by the torch hardens, it is layered on top of the welding slag for the subsequent arc. The arc welding torch is used to raise the next layer of weld metal with the welding torch. Multi-layer welding can be completed with just one rotation, and slag removal and welding torch A welding device that allows pile welding to be performed extremely simply without the need for position adjustment. The company has developed a new system and has already filed a patent application as Japanese Patent Application No. 1-324619.

[0005] Although this multi-layer welding device improves welding efficiency, the drive Since there is only one welding cart connected to the cart, two welding torches are used to weld the entire circumference. In order to do so, one had to circle around the pile once.

[0006]

[Problem that the idea aims to solve]

This invention differs from the conventional technology described above in that it is necessary to turn the pile multiple times on the outer circumference of the pile. Since overlay welding is not possible, the larger the pile diameter, the longer welding time and lower construction efficiency. The aim is to solve the problem of lowering

[0007]

[Means to solve the problem]

In order to solve the above-mentioned conventional problems, this invention is based on a circular ring fixed on the outer periphery of the pile 1. A driving cart 5 is attached to a guide rail 4 having a shape such that it can run freely, and the way in which this driving cart 5 runs is For ready-made piles with welding torch carts 6 connected via connecting fittings 11 and 12 at the front and rear of the direction. We propose an automatic welding machine.

[0008]

[Effect]

When the driving cart 5 drives on the guide rail 4 fixed on the outer periphery of the pile 1, A welding trolley 6 connected to the front and rear of the The welding work is performed by turning the grooves 39 and 39' around the groove of the pile joint.

[0009] At this time, the welding range of one welding cart 6, that is, the moving distance of the driving cart 5 is the entire The distance is 1/the number of welding carts 6 attached to the welding range.

0010 For example, when two welding carts 6 are placed at the bisecting points of the pile circumference as shown in Figure 1, When the driving cart 5 rotates half a turn on the rail 4, the entire circumference is welded, and one welding cart is formed. When one welding torch 39 is attached to 6, one layer welds in half the circumference and two layers welds in one circumference. is carried out, and multilayer welding is completed.

[0011] In addition, when multiple arc welding torches are attached to the left and right sides of one welding cart 6, The first layer of weld metal is deposited by the arc welding torch 39 located in front of the rotating direction. This first layer of weld metal is then layered on top of it before it hardens. The next layer of weld metal is raised by the welding torch 39', and the welding cart 6 is rotated semicircularly. Multi-layer welding can be completed simply by turning the welding carts 6, and as the number of welding carts 6 increases, the turning Welding can be completed in a short time by reducing the number of times.

0012

【Example】

Hereinafter, an embodiment of the present invention shown in the drawings will be described. A rail fixing leg 2 is attached with a fixing screw 3 around the upper pile 1 on which the lower end joint is placed. The annular guide rail 4 attached to the outer periphery of the rail fixing leg 2 is As shown in FIG. 1, the driving truck 5 and the welding truck 6 connected to the front and rear in the running direction are Multiple units are installed so that each can rotate freely.

[0013] As shown in FIGS. 2 and 3, the drive truck 5 has upper and lower wheels 7 attached to its back. A rack rack that is engaged with the top and bottom of the guide rail 4 and attached to the surface of the guide rail 4. The intermediate driving pinion wheel 9 that meshes with the wheel 8 is rotationally driven by a variable speed motor. Therefore, it is configured to rotate around the upper pile 1.

[0014] Each welding cart 6 has upper and lower wheels 10 attached to its back as shown in FIGS. 4 to 6. are engaged with the upper and lower parts of the guide rail 4, and their ends and the front and rear of the drive carriage 5 are connected to each other. It is connected to the drive cart 5 by arc-shaped connectors 11 and 12 connected between the ends and is towed. It is designed to be driven.

[0015] In addition, in the illustrated example, two connected welding carts 6 are arranged at bisecting points of the circumference of the pile. However, if necessary, multiple units can be used to perform various tasks, such as connecting three units and placing them at three equal points. Equal distribution is possible.

[0016] On the surface of the welding cart 6, there are a plurality of lifting rods 13 (three in the figure) that slidably support the lifting rods 13. ) groove-shaped guide holders 14 are installed at intervals on the left and right, and each guide holder is The lever 14 has a pinion that engages with a rack 15 formed on the side of the lifting rod 13. A gear 16 is rotatably supported, and a support shaft 17 of this pinion gear 16 is rotated. By rotating the knob 18, the vertical position of each lifting rod 13 can be adjusted up and down. , each is structured so that it can be tightened and fixed at the required position with a clamp screw 19. has been completed.

[0017] A guide rod protruding horizontally in front of the welding cart 6 is provided at the lower end of each lifting rod 13. A groove-shaped moving holder is provided to surround the guide rod 20. A guide rod 21 is attached to the movable holder 21 so as to move forward and backward. A pinion gear 23 that meshes with a rack 22 formed on the top surface of 0 is rotatably supported. The spindle 24 of this pinion gear 23 can be rotated with a rotation knob 25. adjust the forward and backward position of each movable holder 21, and place each movable holder 21 at the desired position. It is configured such that it can be tightened and fixed using a clamp screw 26.

[0018] A horizontal bracket 27 is protruded from each movable holder 21, and a torch is attached to the bottom of the bracket 27. A sandwiching board 28 or 28' is mounted so as to be horizontally pivotable by a vertical pivot 29. , each torch clamping board 28, 28' has a circular arc slit 3 with the pivot axis 29 as the center of curvature. 0 is provided, and the bracket is inserted through the arcuate slit 30 from below the torch-clamping board 28. Screw the nut 32 onto the protruding upper end of the clamp bolt 31 inserted into the through hole of the nut 27. so that each torch clamping board 28, 28' can be fixed at a required rotation position. It has become.

[0019] In the guide rods 20 located at the front end side and the rear end side of the welding cart 6 in the traveling direction, Below the torch clamping board 28, a V-shaped torch clamping plate 33 is attached to the left and right flaps. It is attached by a fastening bolt 34 at the hinged end.

[0020] Torch jamming in the guide rod 20 located in the middle of the welding cart 6 in the running direction The substrate 28' may originally have the same structure as the torch-clamping substrate 28, but in this embodiment, In this case, the space between the torch-clamping boards 28, 28 was narrowed due to the design. In order to avoid overlapping the other parts, a vertical part 35 is provided below the vertical part 35, and a horizontal part 35 is provided below it. On the other hand, the torch clamping plate 36 is attached to the fastening bolt 37 at its left and right flange-shaped ends. More installed.

[0021] A torch clamping board 28 and a torch clamping plate located on the front end side of the welding cart 6 in the rotating direction 33, a preheating gas torch 38 is narrowly fixed in its main body, and the same Between the vertical portion 35 of the torch-clamping board 28' located in the middle and the torch-clamping plate 36, There is a half space between the torch sandwiching board 28 and the torch sandwiching plate 33 located on the rear end side. Handle of automatic or fully automatic arc welding torch 39 and similar arc welding torch 3 The main body parts of 9' are narrowly fixed with the torch tips facing toward the circumferential side of the pile.

[0022] A bracket 40 provided at the rear end of the welding cart 5 in the rotating direction has a bracket attached to the tip. A main body portion 42 is attached to rotate the slag removal brush 41.

[0023] Using the fully automatic welding machine configured as above, upper pile 1 and lower pile placed on top of it 1' When performing mutual welding, attach the fixing base 2 around the upper pile 1, and Attach the drive cart 5 and welding cart 6 to the guide rail 4 of the base 2, and connect them with a connecting device. Connected by 11.

[0024] Next, use the rotary knob 18 of the welding cart 6 to adjust the vertical position of each lifting rod 13. Each torch tip of the gas torch 38 for knotting and preheating and the arc welding torches 39, 39' Adjust the vertical position of the weld groove 43 between the end plates of the upper pile 1 and the lower pile 1', Next, use the rotary knob 25 to adjust each movable holder 21 forward or backward, and to narrow the torch. While adjusting the rotation of the mounting plates 28, 28', the preheating gas torch 38 and the arc welding torch are turned on. Adjust the tip of each torch of torches 39 and 39' to the appropriate close position and angle to the welding groove 43. Set.

[0025] In particular, the arc welding torch 39 for the first layer located at the front of the welding cart 6 in the direction of rotation. The tip of the arc welding torch 39' for the second layer located at the rear is open for welding. The position is set to be deep relative to the tip 43.

[0026] In addition, the slag removal brush 41 can be adjusted by adjusting the mounting position of the main body 42 as appropriate. Align it on the welding groove 43.

[0027] After the welding preparation work was completed in this way, the traveling speed of the drive cart 5 was adjusted. At the top, turn on the start switch and start turning while towing each welding cart 6. At times, the welding power is also turned on in conjunction with this, and the preheating gas torch 38 starts welding in advance. The tip 43 is heated and dried, and then the arc welding torches 39, 39' are applied to the welding groove 4. Start welding while circling in parallel around 3, and weld the welded part of the multi-layer weld. The slag removal brush 41 rotates and slides on the surface to automatically remove slag. Ru.

[0028] At this time, the preceding arc welding torch 39 deposits the first layer of weld metal. The subsequent arc welding torch 39' is applied to the second layer before this weld metal has hardened. It is important to place the weld metal on each arc at such a timing. The distance between the welding torches 39, 39' and the turning speed are adjusted appropriately.

[0029] When the driving cart 5 is driven, the welding carts 6, 6 are pulled and interlocked, and the driving The welding work is completed when the cart has moved 1/2 round.

[0030] In this way, each arc welding torch 39, 39' makes a half-circle around the welding groove 43. When you turn off the start switch after turning, the welding power is automatically turned off at the same time, and multiple passes can be made in one pass. Layer welding is completed.

[0031] In addition, the above embodiment shows an example in which two arc welding torches 39 and 39' are installed together. However, it is also possible to weld two or more layers using two or more torches, and welding In this case, two layers of welding can be achieved by rotating each welding cart 6 once. be able to communicate with others.

[0032]

[Effect of the idea]

As described above, according to this invention, multiple welded carts linked to the drive cart are installed on the outer periphery of the pile. Because the units are arranged, the welding range per unit is small, which is useful for large-diameter piles, etc. This greatly improves welding efficiency and reduces welding time.

[0033] In addition, welding equipment such as arc welding torches and their mounting adjustment parts are attached to drive carts. is installed on a welding cart that is separated and connected to it, so there is no installation space for welding equipment. There is no restriction on the base, there is freedom in design, and manufacturing is easy. Ancillary equipment such as a torch, slag removal brush or windproof cover can be attached. Moreover, the welding parts of the driving cart and welding cart are separated, making it lightweight and compact. This makes it extremely easy to carry, install and remove the device.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the installed state of the welding device of this invention.

FIG. 2 is a front view of the drive truck according to the invention.

FIG. 3 is a longitudinal sectional side view showing the installed state of the drive truck according to the invention.

FIG. 4 is a front view of the welding cart according to the invention.

FIG. 5 is a plan view of the welding cart according to the invention.

FIG. 6 is a longitudinal sectional side view showing the installed state of the welding cart according to the invention.

FIG. 7 is a perspective view of the welding cart according to the invention.

[Explanation of symbols]

1 Upper stake 1’ Lower stake 2 Rail fixed legs 3 Fixing screw 4 Guide rail 5 Drive truck 6 Welding trolley 7 Wheels 8 Rack rail 9 Drive pinion wheel 10 wheels 11 Connector 12 Connector 13 Lifting rod 14 Guide holder 15 racks 16 Pinion gear 17 Spindle 18 Rotary knob 19 Clamp screw 20 Guide rod 21 Moving holder 22 rack 23 Pinion gear 24 Spindle 25 Rotary knob 26 Clamp screw 27 Bracket 28 Torch clamp board 28’ Torch clamp board 29 Axis 30 Arc slit 31 Clamp bolt 32 Nut 33 Torch narrowing plate 34 Fastening bolt 35 Vertical part 36 Torch fitting plate 37 Fastening bolt 38 Preheating gas torch 39 Arc welding torch 39’ arc welding torch 40 bracket 41 Slag removal brush 42 Main body 43 Welding groove

Claims (2)

[Scope of utility model registration request] [Claim 1] A ready-made product characterized in that a driving truck is movably attached to an annular guide rail fixed on the outer periphery of a pile, and a welded truck is connected to the front and rear of the driving truck via connecting fittings in the running direction. Automatic welding machine for piles. 2. An automatic welding machine for ready-made piles, characterized in that a plurality of welding torches are attached to a welding cart.