JPH0576610U - Punching pipe making equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Automatically measure the wall thickness of the hot punched pipe P immediately after it is discharged from the horizontal press over the entire circumference. [Structure] A wall thickness measuring device 40 is attached to a transverse line 30 of a punching pipe P discharged from a horizontal press. Wall thickness measuring device 40
Has a pair of horizontal contacts 41a and 41b. The lowermost part of the punching pipe P is sandwiched from above and below by the ceramic touch rollers 411 and 411 provided at the tips of the contacts 41a and 41b. In this state, the punching pipe P is rotated in the circumferential direction. The change in the distance between the contacts 41a and 41b during this time is detected by the magnet scale 46.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punching pipe manufacturing apparatus used for manufacturing a thick-walled pipe.

[0002]

[Prior Art]

 Thick-walled pipes manufactured by Erhard Pushbench punching are often used for material pipes such as pressure vessels and boiler headers that require pressure resistance. A so-called lateral press is used for this punching pipe, in which a heated bottomed shell is held by the tip of a cored bar and the cored bar is advanced to pass the bottomed core tube through a die.

In the horizontal press, since the pipe manufacturing dimensional accuracy is considerably low, after the first press after the setup change, the dimensions of the punched pipe, particularly the wall thickness, are measured, and there is a problem in the die angle and the like. At times, this is corrected and the subsequent pressing is performed. The wall thickness measurement here is performed on the punched pipe immediately after being discharged from the horizontal press in order to immediately start the subsequent pressing. However, since the punched tube has a high temperature of about 1000 ° C, and it is difficult to use a wall thickness measuring instrument using ultrasonic waves, etc., hand measurement using a pass is still performed.

[0004]

[Problems to be solved by the device]

 In such wall thickness measurement, the operator had to approach the red-hot punched pipe, and the work involved severe physical and mental pain. Further, in manual measurement in a harsh environment, at most, it was possible to measure at only one point in the circumferential direction of the pipe, and it was impossible to know the uneven thickness condition of the punched pipe. ..

An object of the present invention is to provide a punching pipe manufacturing apparatus capable of automatically measuring the wall thickness of a punching pipe immediately after being discharged from a horizontal press, without requiring manual labor and over the entire circumference. Especially.

[0006]

[Means for Solving the Problems]

 The punching pipe manufacturing apparatus of the present invention includes a horizontal press that inserts a mandrel into a heated bottomed base pipe, advances the cored bar to pass the bottomed base pipe through a die, and a front side of the horizontal press. A lateral line extending laterally from the horizontal press to traverse the punched pipe discharged from the horizontal press; a tube rotating machine that rotates the punched tube in the circumferential direction in the transverse line; and a tube rotating machine that rotates the tube. A wall thickness measuring device attached to the traverse line so as to face the opening-side pipe end of the punching pipe, the wall thickness measuring device being a pipe of the punching pipe rotated by a pipe rotating machine. A pair of contacts whose central axes are parallel to each other, are movable in the plane including both axes in the axial direction and the direction perpendicular to the axis, have a ceramic touch roller at the tip, and cooling water flows inside the roller shaft. A child and a pair of contacts in the plane containing the central axis of each A first drive means for moving in a direction perpendicular to the axis, a second drive means for reciprocating a pair of contacts in the direction of the central axis, a measuring device for measuring the distance between the pair of contacts, and the measurement. The present invention is characterized in that it has a heat insulating cover which covers a part or all of the thickness measuring instrument including a vessel and through which cold air flows.

[0007]

[Action]

 The punched pipe discharged from the horizontal press is conveyed to the pipe rotating machine in the transverse line. Then, the pair of contacts in the wall thickness measuring instrument are synchronously moved in the axial direction to insert the tip of one of the contacts into one end of the pipe. When the tip of one of the contacts is inserted into one end of the tube, the gap between the pair of contacts is shortened and the tube end is elastically sandwiched from inside and outside by the ceramic touch roller. In this state, the pipe is rotated once in the circumferential direction by the pipe rotating machine, and the change in the contact interval at this time is detected, so that the wall thickness of the pipe is automatically measured over the entire circumference.

[0008]

【Example】

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

FIG. 1 is a plan view showing the overall layout of the punching pipe manufacturing apparatus, and FIG. 2 is a side view showing the structure of the wall thickness measuring device in detail.

As shown in FIG. 1, the punching pipe manufacturing apparatus includes a horizontal press 10. The lateral press 10 has a cored bar 12 driven by a hydraulic ram 11. The cored bar 12 holds a heated base pipe P ₀ with a bottom at its tip and passes it through a plurality of dies 13 to form a push-out pipe P. As a method of passing the bottomed raw pipe P ₀ through a plurality of dies 13, a method of moving the core metal 12 forward and backward while replacing the dies 13 to gradually reduce the thickness of the bottomed raw pipe P ₀ , and a plurality of dies are used. 13 is a method of passing the bottomed raw tube P ₀ at a stretch. Any method may be adopted in the punching pipe manufacturing apparatus of the present invention.

The punched pipe P that has passed through all the dies 13 and is discharged to the outlet side conveyor 14 is transferred to the traverse line 20 laterally connected to the outlet side conveyor 14. The traverse line 20 is composed of, for example, a skid conveyor, and traverses the hot punching pipe P discharged from the pushing press 10. A tube rotating machine 30 is arranged in the middle of the traverse line 20. The punching pipe P traveling along the traverse line 20 temporarily stops traversing on the pipe rotating machine 30, is rotated in the circumferential direction, and the wall thickness is measured by the wall thickness measuring device 40.

The wall thickness measuring device 40 is installed on the lateral side of the traverse line 20 so as to face the open pipe end of the punching pipe P traveling along the traverse line 20. It is located on the extension of the center line.

As shown in FIG. 2, the wall thickness measuring device 40 has a pair of upper and lower horizontal contactors 41a and 41b. The contacts 41a and 41b are both parallel to the center line of the tube rotating machine 30, and the upper contact 41a is fixed to the elevating base 42. The lower contactor 41b is movably supported in the vertical direction by a pair of front and rear guides 43a and 43b attached to the elevating base 42.

The elevating base 42 is placed on the traveling body 44, and is moved up and down by the cylinder 45a on the traveling body 44 to adjust the level of the upper contact 41a. On the other hand, the lower contactor 41b is moved up and down by the cylinder 45b attached to the elevating base 42, thereby adjusting the distance between the contactors 41a and 41b. And, in order to measure this distance, a magnescale 46 is attached to the elevating base 42.

The traveling body 44 moves forward and backward in the central axis direction of the contacts 41a and 41b. The lifting base 42 is equipped with a sensor 47a biased forward. The sensor 47a operates the limit switch 47b by contacting the end surface of the punching pipe P on the pipe rotating machine 30, and stops the traveling body 44 at the forward limit.

The pair of contacts 41a, 41b in the wall thickness measuring device 40 has a tip portion projecting forward of the elevating base 42, and a tip portion of the contact piece 41a, 41b from the pipe end position of the punching pipe P as the traveling body 44 advances. Move further forward. Each of the contacts 41a and 41b has a ceramic touch roller 411 at the tip. The ceramic touch roller 411 is rotatably supported by a roller shaft 412, and its rotation axis is aligned with the central axes of the contacts 41a and 41b.

The elevating base 42 is housed in a heat insulating cover 48. A heat shield plate 49 is provided in front of the heat shield cover 48. The tip portion of the roller shaft 412 penetrates the heat insulating plate 41 and projects to the front thereof. Then, in order to prevent thermal damage to the protruding portion, cooling water is continuously circulated through the roller shaft 412, and in order to protect the magnescale 46 and the like in the heat insulating cover 48, the cover is provided inside the cover. Fresh air is distributed continuously.

Next, the operation of the wall thickness measuring device 40 will be described.

When the wall thickness is not measured, the traveling body 44 is retracted to a position where the tips of the contacts 41 a and 41 b do not interfere with the traverse line 20. Further, the upper contact 41a is located at the upper limit, and the lower contact 41b is located at the lower limit. The punching pipe P is discharged from the horizontal press 10 and conveyed to the pipe rotating machine 30 by the traverse line 20, and when the pushing pipe P stops on the pipe rotating machine 30, the traveling body 44 starts to move forward.

The upper contact 41a is designed to be higher than the lowermost inner surface of the punching pipe P at the upper limit, and the lower contactor 41b is designed to be lower than the lowermost outer surface of the punching pipe P at the lower limit. Therefore, as the traveling body 44 advances, the tip of the upper contactor 41a is inserted into the pipe along the lowermost inner surface of the push-out pipe, and the tip of the lower contactor 41a moves below the push-out pipe P. Advance along its bottom outer surface. Then, when the lowermost portion of the punching pipe P is sufficiently inserted between the tips of the contacts 41a and 41b, the sensor 47a comes into contact with the end face of the punching pipe P and the limit switch 47b is actuated, so that the traveling body 44 stops.

When the traveling body 44 stops, the cylinder 45a operates to lower the upper contact 41a, and the cylinder 45b operates to raise the lower contact 41b. As a result, the distance between the contacts 41a and 41b is reduced, and the ceramic touch rollers 411 and 411 are elastically pressed against the lowermost portion of the punching pipe P 1 from above and below. Then, by rotating the punching pipe P in the circumferential direction and recording the output of the magnescale 46 during this period, the wall thickness of the punching pipe P is automatically measured over the entire circumference.

At this time, the ceramic touch rollers 411 and 411 are not damaged by the heat of the punching pipe P. Further, since the cooling water flows through the roller shaft 412, thermal deformation is prevented even though the tip end of the roller shaft 412 is close to the punching pipe P. Further, the Magnescale 46 and the like are doubly shielded from the heat of the punching pipe P 2 by the heat insulating cover 48 and the heat insulating plate 49, and the fresh air is circulated in the heat insulating cover 48, so that the stable operation is ensured. Is guaranteed.

[0023]

[Effect of the device]

 As is clear from the above description, the punching pipe manufacturing apparatus of the present invention can automatically measure the wall thickness of the hot punching pipe immediately after being discharged from the horizontal press over the entire circumference. Therefore, the dimensions of the punched pipe can be accurately grasped, the subsequent pipe manufacturing dimensional accuracy can be greatly improved, and the burden on the operator can be significantly reduced. Furthermore, since the touch roller of the contactor is a ceramic roller and the cooling water is circulated through the roller shaft, damage to the contactor due to heat is prevented. In addition, measures against the heat of the measuring instrument are taken sufficiently. Therefore, the durability of the wall thickness measuring instrument is also high.

[Brief description of drawings]

FIG. 1 is a plan view showing an overall layout of a punching pipe manufacturing apparatus of the present invention.

FIG. 2 is a side view showing the structure of the wall thickness measuring device in detail.

[Explanation of symbols]

 10 Horizontal Press 20 Traverse Line 30 Tube Rotating Machine 40 Wall Thickness Measuring Instrument 41a, 41b Contactor 42 Lifting Base 44 Traveling Body 45a, 45b Cylinder 46 Magnescale 48 Heat proof Cover 411 Ceramic Touch Roller 412 Roller Shaft P Punching Tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masatsugu Yamamoto, No. 1 Nishinomachi, Higashimukaijima, Amagasaki City, Hyogo Prefecture, Sumitomo Kinzoku Kogyo Co., Ltd. (72) Shoji Kinomura Nishinocho, Higashimukaijima, Amagasaki City, Hyogo Prefecture No. 1 Sumitomo Kinzoku Kogyo Co., Ltd. Steel pipe factory

Claims (1)

[Scope of utility model registration request] 1. Inserting a mandrel into a heated bottomed tube,
A horizontal press that advances the mandrel to pass the bottomed tube through a die, and a traverse line that extends laterally from the front of the horizontal press and traverses the punched pipe discharged from the horizontal press, A tube rotating machine in the traverse line for rotating the punching pipe in the circumferential direction, and a wall thickness measurement attached to the traverse line so as to face the opening side pipe end of the punching pipe rotated by the pipe rotating machine. The thickness measuring device is provided with a central axis of each of the tube axes of the punched tube rotated by the tube rotating machine and is movable in the plane including both axes in the axial direction and the axis-perpendicular direction. And a pair of contacts having a ceramic touch roller at the tip and through which cooling water is circulated inside the roller shaft, and the pair of contacts in a plane perpendicular to the central axis in a plane including the respective central axes. The first drive means for moving and the pair of contacts are arranged on the central axis. The second drive means that reciprocates in the direction, a measuring device that measures the distance between the pair of contacts, and a part or all of the wall thickness measuring device including the measuring device are covered, and cool air is circulated inside. A punching pipe manufacturing apparatus having a heat insulating cover.