JPH05274U - Automatic pipe welding equipment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Good welding quality is obtained by restraining the seam from the inner and outer surfaces. A device for welding a seam of a short pipe bent from a plate, which is a pipe feeding unit 10,
Pipe rolling unit 20, pipe pressing unit 4
0, a sensor unit 50, a mandrel unit 60, a clamp unit 70, a pipe discharge unit 80, and a welding robot 90. A pipe end abutting plate 42 that abuts one end of the pipe on the pipe rolling unit is attached to the rod end of the pipe pressing unit, and the mandrel 62 is horizontally movable and cantilevered at its base end. Has a pipe end contact plate 61 that is elastically connected to the support plate and the tip of the mandrel penetrates to face the contact plate 42. The rolling unit rotates the pipe that has been sent in, and stops the joint with the seam facing straight up. The pipe is clamped and positioned between the two abutting plates, and the fitted mandrel and clamp are used to restrain the pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for automatically welding a joint of a short pipe, which is formed by bending a short plate into a substantially circular shape.

[0002]

[Prior Art]

 In this kind of automatic welding device, the joints P1 and P2 of the fed short pipe (hereinafter, referred to as pipe, indicated by reference symbol P in FIG. 10) are automatically detected, the pipe is clamped in the detected posture, and in this posture Although the welding line is welded while it is being fed, the cramp of this pipe restrains the outer circumference of the pipe as seen in Japanese Examined Patent Publication No. 2-15310.

[0003]

[Problems to be solved by the device]

 In this way, in the method of clamping by clamping the outer circumference of the pipe, since it is possible to displace inward, distortion to the inner surface due to welding heat, variation in the shape and size of the beat are likely to occur, and welding quality is improved. There was a problem called variation.

The present invention has been made to solve this problem, and provides an automatic pipe welding apparatus which can always obtain good welding quality by restraining the joint portion of the pipe from the inner and outer surfaces. With the goal.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a pipe feeding unit, a pipe rolling unit having a pair of rolling receiving rollers for receiving a pipe at a pipe outlet of the pipe supply unit, and a pipe rolling unit that can move up and down. A pipe pressing unit having a cylinder in which a rod advances and retracts in the roller direction above the motion receiving roller pair, and a sensor unit having a seam sensor above the rolling motion receiving roller pair of the pipe rolling unit and detecting a pipe axial direction seam. A mandrel unit having a mandrel facing the rod advancing / retracting direction, and a clamp unit having a clamper which can be moved up and down on the mandrel above a steady state position of the mandrel. , With a welding mechanism for welding pipe discharge units and pipe seams A pipe end abutting plate is attached to the rod end of the cylinder, which abuts against one end of the pipe on the rolling receiving roller pair that has been lifted, and the mandrel is horizontally retractable. The mandrel has a pipe end contact plate that is elastically connected to the base end part and cantilever-supports the mandrel, and the pipe end contact plate penetrates through the mandrel. Therefore, it is configured to face the pipe end contact plate.

[0006]

[Action]

 In the present invention, at the time of welding, the pipe joint of the pipe is received by the mandrel from the inner surface and is held by the clamper from the outer surface.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the arrangement of main units of the apparatus of this embodiment, and FIG. 2 shows the details thereof.

In FIG. 1, 10 is an intermittent pipe feeding unit, 20 is a pipe rolling unit, 40 is a pipe pressing unit, 50 is a sensor unit, 60 is a mandrel unit, 70 is a clamp unit, 80 is a pipe discharge unit, and 90. Is a welding unit.

In FIG. 2, the intermittent pipe feeding unit 10 is provided on a pipe chute 12 tilted and supported on four columns 11 standing on the base 1 and its descending side end (outlet side). The stop cylinder 13 for intermittent feeding is provided.

The pipe rolling unit 20 has an elevating table 21 and vertical supporting frames 22 and 23 provided on the elevating table 21, and two rolling bearings arranged in close proximity and parallel to each other between the supporting frames 22 and 23. The rollers 24 and 25 are pivotally supported. These two rolling receiving rollers 24 and 25 are arranged at the outlet 12B of the pipe chute 12 in a direction intersecting with the pipe feeding direction, and one rolling receiving roller 24 is located on the lift table 21. From 26, a rotational force is transmitted via a transmission mechanism including a pulley 27, a belt 28, and a pulley 29. Reference numeral 30 is an elevating cylinder for moving the elevating table 21 up and down, 31 and 32 are guide rods hanging from under the elevating table 21, and the guide rods 31 and 32 are supported by a vertical support frame 33. The guide cylinders 35 and 36 provided on the horizontal frame 34 guide the elevator up and down.

Reference numeral 41 denotes a cylinder of the pipe pressing unit 40, which is horizontally supported by the support frame 33 at a predetermined height above the base 1 via a support member 41A. The cylinder 41 is supported in a posture in which the rolling bearing rollers 24, 25 are oriented in the axial direction, and a pipe contact plate 42 (shown in FIG. 3) provided at the rod end of the cylinder 41 is used for the rolling bearing rollers 24, 25. A predetermined height position on the boundary line of 25 is defined as an advance / retreat path L.

Reference numerals 51 and 52 denote pipe joint detection sensors of the sensor unit 50, which are located in a predetermined direction in the forward / backward path L above the predetermined height position on the boundary line between the rolling receiving rollers 24 and 25. It is held by the support plate 45 with a space therebetween.

Reference numeral 61 denotes a pipe end contact plate of the mandrel unit 60, and a tip end side of a mandrel 62 extending in the forward / backward path L direction is penetrated therethrough. The base end of the mandrel 62 is supported by the front surface of a support plate 63, and the support plate 63 is supported by the end of the rod 64A of the mandrel cylinder 64. 65A and 65B are guide shafts, one end of which extends through the support plate 63 and extends parallel to the mandrel 62, and the other end of which extends through the pipe end contact plate 61. A retaining member (stopper member) 65C is attached to both ends of the guide shafts 65A and 65B. A coil spring 66 is interposed between both guide shafts 65A and 65B. 67A and 67B are guide shafts, one end of which is fixed to the back surface of the support plate 63 and which extends in parallel with the rod 64A, and the other end of which penetrates the guide cylinders 68A and 68B. A fixed frame 69 supports the mandrel cylinder 64 and the guide tubes 68A and 68B.

As shown in FIG. 4, the clamp unit 70 has clampers 71 and 72. The clampers 71 and 72 are attached to support members 73 and 74, respectively, and the support members 73 and 74 are slidably (right and left openable / closable) supported on a fixed member 75. 76A and 76B are slide bolts, and 77A and 77B are return springs.

As shown in FIG. 5, the welding unit 90 is engaged with a horizontal guide rail 91 on an elevator (not shown) and is reciprocally driven in the advance / retreat path L direction, and a welding torch supported by the arm 92. It is a welding robot equipped with 94. The relationship between the welding robot and the other parts described above is shown in FIGS. 8 and 9.

Next, the operation of this device will be described.

(1) The pipe P carried into the carry-in port 12A of the pipe chute 12 rolls on the pipe shoot 12 and rolls out from the outlet 12B onto the receiving rollers 24 and 25.

(2) When the pipe P rolls over the rolling receiving rollers 24, 25, the lifting cylinder 30 moves forward, and the receiving rollers 24, 25 reach a height at which the axis of the pipe P coincides with the forward / backward path L. Rises.

(3) Since the rolling receiving roller 24 is rotating, the pipe P is also rotated on the receiving rolling receiving rollers 24 and 25. When the joint of the pipe P comes under the pipe joint detecting sensors 43 and 44, both sensors 43 and 44 generate a detection signal.

(4) By this detection signal, the rotation of the rolling receiving rollers 24, 25 pipe and the pipe P is stopped, the pipe P is positioned in a posture in which the seam faces directly upward, and the pressing cylinder 40 moves forward. Then, the pipe P is pushed to the mandrel 62 side. As a result, the end of the pipe P is externally fitted to the end of the mandrel 62, and the pipe P moves to the support plate 62 while pushing the pipe end contact plate 61 by the further movement of the rod 40A. As shown in FIG. 7, the pipe P is sandwiched between the coil contact plate 42 of the cylinder 40 for pressing and the pipe end contact plate 60.

(5) When this positioning of the pipe P is completed, the clampers 70, 71 are closed, and the vicinity of the joint of the pipe P is pressed between the pipe P and the mandrel 62, as shown in FIG.

(6) When this clamp ends, the welding torch 93 descends and welds the seam. (7) When welding is completed, the welding torch 93 retracts to the standby position, the clampers 71 and 72 open, and the mandrel cylinder rod A64 retracts. When the mandrel 62 retracts, the pipe P comes out of the mandrel 62 due to the action of the coil spring 66 and drops onto the discharge unit 80.

[0024]

[Effect of the device]

 As described above, according to the present invention, the pipe joint is received from the inner surface by the mandrel, and the pipe joint is welded by being pressed by the clamper from the outer surface. It is possible to improve the welding quality and reduce the variation in the welding quality as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a diagram showing an arrangement of units according to an embodiment of the present invention.

FIG. 2 is a perspective view except a part of the above embodiment.

FIG. 3 is a view showing a pipe contact plate of the cylinder for pressing a pipe in the above embodiment.

FIG. 4 is a diagram showing a configuration of a clamp unit in the above embodiment.

FIG. 5 is a diagram showing a configuration of a welding unit in the above embodiment.

FIG. 6 is a diagram showing a relationship between a pipe and a mandrel in the above embodiment.

FIG. 7 is a view showing a pipe clamp state in the above embodiment.

FIG. 8 is a side view of the welding unit in the above embodiment.

FIG. 9 is a perspective view of a welding unit in the above embodiment.

FIG. 10 is a perspective view of a pipe.

[Explanation of symbols]

 10 Pipe intermittent feeding unit 20 Pipe rolling unit 24, 25 Rolling receiving roller 30 Lifting cylinder 40 Pipe pressing unit 41 Pipe pressing cylinder 42 Pipe end contact plate 51, 52 Pipe joint detection sensor 60 Mandrel unit 61 Pipe end fitting Contact plate 62 Mandrel 64 Mandrel advancing / retreating drive cylinder 66 Coil spring 70 Clamp unit 71, 72 Clamper 75, 76 Clamper lifting cylinder 80 Pipe discharge unit 90 Welding unit 93 Welding torch

Claims (1)

[Claims for utility model registration] 1. A device for welding a joint of a short pipe bent from a plate, which is a pipe feeding unit,
A pipe rolling unit having a rolling receiving roller pair for receiving a pipe at a pipe outlet of the pipe supply unit and capable of moving up and down; A pipe pressing unit, a sensor unit above the rolling receiving roller pair of the pipe rolling unit, and having a joint sensor for detecting a joint in the axial direction of the pipe; A mandrel unit having a mandrel facing in a direction; a clamp unit having a clamper capable of ascending and descending above the mandrel at a stationary position above the mandrel; a pipe discharge unit; and a welding unit having a welding mechanism for welding pipe joints. , The rod end of the cylinder is A pipe end contact plate that contacts one end of the pipe on the pair of receiving rollers is attached, and the mandrel is capable of advancing and retracting in the horizontal direction, and is elastically connected to a support plate that cantilevers the base end part thereof. A pipe end contact plate through which the mandrel tip portion penetrates, the pipe end contact plate being in the vicinity of the raised rolling receiving roller pair and facing the pipe end contact plate. Characteristic pipe automatic welding equipment.