JPH0343114A - End face processing device for angular pipe - Google Patents

Abstract

PURPOSE:To prevent the collapse of an angular steel pipe by drillingly providing an angular hole corresponding to the outer shape of an angular steel pipe on the side surface of a die with a given angle tilted, insertingly mounting the angular steel pipe into the said bole, providing a movable cutter in a crossing direction to the axis line of the angular steel pipe, and processing the end part of the angular steel pipe with the said cutter. CONSTITUTION:When an angular steel pipe 1 is insertingly mounted touching to the surface 12a of a fixed die 12, an air cylinder is operated right, and a punch holder 26 is lowered, a cotter plate 21 moves right, a cotter plate 19 lowers, and a slide die 18 is pushedly pressed. On the other hand, a slide die 13 is pushed right by the lowering of a cotter plate 25, consequently the upper and lower and right and left sides of the angular steel pipe 1 are fixed. Next since a cam 30 is pushed down with a punch 32 due to the lowering of the punch holder 26, a cutter 10 moves left via a cam 27, and the tip of the angular steel pipe 1 is cut down with the cutter 10. In this case, since the pipe wall of the angular steel pipe 1 is pushedly pressed to a die 8 from the inside to be sheared with the cutter 10, the angular steel pipe 1 is not collapsed, and a processed surface without burr can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an end face processing device for processing the end or end face of a rectangular tube into a plane that intersects the axis, and in particular, it relates to an end face processing device that processes the end face or end face of a rectangular tube into a plane that intersects with the axis. The present invention relates to an end face processing device for a rectangular tube.

[Prior Art] Conventionally, for example, the cut shape of the end face of a square steel pipe is as follows:
There are three types shown in FIGS. 5(a) to 5(C). Figure 5 (a
) is when the cut surface of the square steel pipe 1 is perpendicular to the wall surfaces 1a and 1b, FIG. 5 (0)) is when the cut surface is perpendicular only to the wall surface 1b, and FIG. This shows the case where there is a non-perpendicular angle to both. When processing these cut surfaces, in the case of the rectangular W4 tube 1 shown in FIG. 5(a) (C1), it can be easily processed using a press mold.

6(a) and 6(b) are a perspective view and a front view of a main part showing a press die for end face processing or cutting of a square steel pipe 1, respectively. In both figures, 2.3 is a punch and a die, respectively. It is fixed to the ram and table of a press (not shown) and is formed so as to be vertically movable between the two. die 3
is provided with a V-shaped surface 3a that abuts and supports the adjacent wall surfaces 1a and lb of the square steel pipe 1, and is also provided with a groove 3b formed so that the punch 2 can partially enter therein.

With the above configuration, when the square steel pipe 1 is supported on the ■-shaped surface 3a of the die 3 and the punch 2 is lowered.

The end faces can be processed to be perpendicular to the wall surfaces 1a and 1b.

In this case, by aligning one of the diagonals of the cross section of the square steel pipe l with the direction of movement of the punch 2, the shear stress will be dispersed appropriately, and the cut surface will be processed beautifully without crushing the square steel pipe l. I can do it.

Note that as shown in FIG. 5(C), the cut surface is a square steel pipe 1.
In the case of a plane that intersects the axis of
It is a matter of course that the ■-shaped surfaces 3a, 3a shown in FIG.

(To be solved by the invention! 1B) The above-mentioned FIGS.
The end face of the square steel pipe 1 shown in FIG. 5(b) can be cut or processed, but in the case of the square steel pipe 1 shown in FIG.
It cannot be processed using normal press molds. That is, according to the punch cutting process, a part of the square steel pipe 1 is crushed and deformed, so there is a problem that a predetermined shape cannot be maintained.

In order to solve this problem, attempts have been made to perform punch cutting with a core inserted into the square steel pipe 1 to prevent crushing. The condition of the surface is not necessarily beautiful.

There is also the problem that no improvement in dimensional accuracy can be expected.

It is also possible to process without using a press mold, for example, with a high-speed cutting machine using a thin disc grindstone, but this causes significant burr on the cut surface.

There is a problem in that the post-processing work to remove this is extremely complicated, and it also generates noise and dust, which significantly deteriorates and pollutes the working environment.

On the other hand, the square steel pipe 1 having the shape shown in FIGS. It is necessary to process it into a plane that intersects the axis. Further, FIG. 8 shows a frame made of square steel pipes, and the corners of each frame member 7 must be processed into slopes for joining. As described above, there are many demands for an apparatus that can easily and accurately process a square steel pipe l having the shape shown in FIG. 5(b), and its early appearance is expected.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a new and useful end face processing device for processing the end face of a rectangular tube into a plane that intersects with the axis.

[Means to solve the problem]

In order to achieve the above object, the first invention includes a fixed die having a surface that contacts and supports the bottom surface and/or one side surface of the square tube, and a fixed die that presses the other side surface of the square tube. a first slide die formed to have a surface that presses the upper surface of the rectangular tube and to be movable in a predetermined direction; a second slide die that has a surface that presses the upper surface of the rectangular tube and is formed to be movable in a predetermined direction; and a cutter that is movable in a direction intersecting the axis of the rectangular tube, and the cutter is configured to process the end face of the rectangular tube into a plane that intersects with the axis. A technical method was adopted.

In a second invention, the technical means of the first invention is connected to a moving means operated by a cotter plate or a cam plate in which at least one slide die and/or cutter is formed to be vertically movable. We added this technical means.

[For production]

1(a) and 1(b) are perspective views of essential parts showing the principle of the present invention. In both figures, 8 is a die, and the square steel pipe 1
A square hole 9 corresponding to the external contour of is bored at a predetermined angle with respect to the side surface 8a of the die 8, and a square steel pipe 1 is formed in a detachable manner. 10 is a cutter.

The distal end portion is formed to be slightly smaller in size than the circular outline of the square steel pipe 1, and the rear width and height are gradually increased to form a chisel shape, and is provided so as to be movable in the horizontal direction on the side surface 8a.

With the above configuration, first, as shown in FIG. 1(a), after positioning the square steel pipe l with its tip protruding from the square hole 9,
Move the cutter 10 in the direction of the arrow.

By moving the cutter 10 in this way.

As shown in FIG. 1), the cutter 10 cuts off the tip of the square steel pipe 1, so that the square steel pipe 1 having the shape shown in FIG. 5(b) can be obtained. In this case, since the cutter 10 shears the tube wall of the square steel pipe 1 by pressing it against the die 8 from the inside, a beautiful machined surface can be obtained without crushing or deforming the square steel pipe 1.

Note that during the above-mentioned processing, the load shown by arrow P is applied to the square steel pipe 1, so it is necessary to support it in the direction shown by arrow Q with a force corresponding to the cutting resistance. In addition, the square hole 9 to be provided in the die 8 is designed to prevent the square steel pipe 1 from deforming.
It is preferable to form the gap with the square steel pipe 1 as small as possible, but due to variations in the external dimensions of the square steel pipe I, burrs that occur on the cut surface, bending in the axial direction, etc. If not secured, it will be difficult to handle when inserting and removing the square steel pipe 1, so these should be taken into consideration and selected appropriately.

〔Example〕

FIG. 2 is an explanatory diagram of the main part configuration showing an embodiment of the present invention.

In FIG. 2, a die holder 11 is formed into a flat plate shape and is attached to a press table (not shown) via bolts or other fastening members. I2 is a fixed die,
The die holder 1 is provided with an orthogonal surface 12a that contacts the bottom surface and one side surface of the square steel pipe 1 and supports these surfaces.
It is fixed to the top surface of 1. A slide die 13 is provided with a surface for pressing the other side of the square steel pipe 1.

Both are integrally provided so as to be movable in the horizontal direction via a slide block 14. Reference numeral 15 denotes a backup block, which is fixed to the upper surface of the die holder 11 and has the shaft 1G interposed so as to be movable in the horizontal direction.

The right end of the shaft 16 is connected to the slide block 14, and the left end of the shaft 16 is connected to a backup block 15.
A compression coil spring 17 is interposed between the two. Next, a slide die 18 is provided with a surface for pressing the upper surface of the square steel pipe 1, and is provided so as to be movable up and down integrally with the cam plate 19. Note that a spring (not shown) is built into the slide die 1B so that an upward pressing force always acts thereon. Reference numeral 20 denotes a backup block, which is formed into a gate shape and is fixed to the upper surface of the die holder 11. A contour plate 21 is interposed between the cam plate I9 and the backup block 20.

It is connected to the rod 23 of the air cylinder 22 and is movable in the horizontal direction. 24 is a bearing, which supports the rod 23 in a slidable manner, and 25 is a cotter plate, which is movable vertically together with a punch holder 26 fixed to the lower surface of the ram of the press (none of which is shown). It is formed between the slide block 14 and the bank up block 15 so as to be freely engageable and detachable.

FIG. 3 is an explanatory diagram showing the main part configuration of an example of a cutter drive device according to an embodiment of the present invention, and the same parts are shown in FIG. 1 (
a) Indicated by the same reference numerals as in (b) and FIG. In Fig. 3, 27 is a cam, and a cutter 10 is attached to the tip.
is fixed and provided on the upper surface of the die holder 11 so as to be movable in the horizontal direction. A guide 28 supports the cutter 10 so as to be movable in the horizontal direction. 29 is a backup block, which is fixed to the die holder 11 and also supports the cam 2.
A cam 30 is interposed between the cam 27 and the backup block 29, and a tension coil spring 31 is interposed between the cam 27 and the backup block 29. Naorim 30 has cam 27 and backup block 2
9, a vertically movable bulge is formed. Next, 32 is a punch, which is provided protrudingly from the lower surface of the punch holder 26 and is formed to be able to engage and detach from the cam 30. In FIG. 3, the fixed die 12 and slide die 18 are only shown by lines t and I, but their relative positions with respect to the square steel pipe 1 and cutter 10 are shown in FIGS. 1(a) and (b). Form it like this. That is, the cutter 10 slides on the side surface of the fixed die 12 and, if necessary, the side surface of the slide die 18 (none of which are shown), so that the moving direction of the cutter 10 intersects the axis of the square steel pipe 1 at a predetermined angle. to form.

With the above tank bottom, when the square steel pipe 1 is inserted in contact with the orthogonal surface 12a of the fixed die 12 in FIGS. 2 and 3 and the air cylinder 22 and punch holder 26 are actuated, first the right By moving in this direction, the cam play 1-19 descends, and the slide die 18 presses the upper surface of the square steel pipe l. On the other hand, due to the lowering of the punch holder 26, the cotter plate 25 is moved to the slide block 1.
4 and backup block 15, so
The slide block 14 and slide die 13 are moved to the right to press the side surface of the square steel pipe 1.

A square steel pipe 1 is held between a slide die 13 and a fixed die 12. Therefore, the rectangular steel tube 1 is firmly held by the fixed die 12 and the slide die 13. Since the cam 30 is moved downward, the cutter 10 is moved to the left via the second cam 27. Therefore, the above-mentioned figure 1 (
As shown in b), the end face of the square steel pipe 1 can be processed into a plane having a predetermined angle with the axis. After finishing processing, the air cylinder 22 and punch holder 2
6 in the opposite direction to the above.

First, in FIG. 2, as the cotter plate 21 moves to the left, the cam plate 19 and the slide die 18 move upward. Further, as the cotter plate 25 moves upward, it separates from between the slide block 14 and the backup block 15, so the spring 17 moves the slide block 14 and the slide die 13 to the left.

Therefore, a gap is created between the square steel pipe 1 and the slide die 13, 1B, and the square steel pipe 1 can be easily taken out.

The square steel pipe 1 to be processed next can be easily inserted.Next, when the punch holder 26 moves upward in FIG. It moves to the right by the restoring force of the coil spring 31, returns to its pre-processing position, and prepares for the first processing.

FIG. 4 is an explanatory diagram of the main part configuration of an example of a thrust support device according to an embodiment of the present invention. In FIG. 4, a holder 33 is provided integrally with the die holder 11. A back-up plate 34 is fixed to the upper surface of the holder 33 near the unprocessed end of the square steel pipe 1.

A presser foot [35 is rotatably provided at the upper end. Reference numerals 36 and 37 designate links which are rotatably connected to each other and whose other ends are rotatably connected to the presser plate 35 and holder 34, forming a so-called double lever mechanism. Furthermore, link 3
The detent plate 38 is moved between the links 36 and 36 so that the links 36 and 37 are locked at positions slightly rotated clockwise and counterclockwise, respectively, from the position where the three rotation points of the links 36 and 37 form a substantially straight line. 37. 39 is a handle.

After positioning the square steel pipe l using the tank bottom as described above, the fourth
If the presser plate 35 is brought into contact with the unprocessed end of the square steel pipe 1 in the state shown in the figure, the first V! As shown in J(b), even if a load is applied to the square steel pipe 1 in the direction of arrow P, the links 36 and 37 do not rotate and can hold the square steel pipe 1 at a predetermined position. After processing, rotate the handle 39 in the clockwise direction shown by the arrow to remove the links 36 and 37.
is bent to rotate the holding plate 35 clockwise, releasing the pressure on the square steel pipe 1 in the axial direction, and the holding plate 35 collapses, allowing the square steel pipe 1 to move to the right.

In this embodiment, as shown in FIG. 2, a configuration in which the slide dies 13 and 1B are provided separately has been described, but it is also possible to form both of them as an integrated slide die having orthogonal pressing surfaces so as to be movable in diagonal directions. You can also do it. On the other hand, the fixing die 12 may be divided into two parts for supporting the bottom surface of the square steel pipe 1 and one for supporting the side surfaces thereof, and the two parts may be fixed separately. Next, slide die 13.1B
As the means for moving the cutter 10, in addition to those using a cam and a hydraulic cylinder, known linear moving means can be used. Furthermore, the workpieces are not only rectangular steel pipes, but also those made of other constituent materials, and those with rectangular cross-sectional contours and irregularly shaped quadrilaterals.

Even if the tube is a polygon, the effect is similar.

[Effects of the Invention] Since the present invention has the structure and operation as described above,
The following effects can be achieved.

(1) Since the end face of the rectangular tube is sheared using a cutter, chips or cutting debris are scattered.

No noise is generated and the work environment can be kept quiet and clean.

(2) Beautiful machined surface and high dimensional accuracy.

In addition, since there is little deburring work after processing, the work can be done easily and efficiently.

(3) When processing a square tube, the outer surface is held securely and the inner wall surface of the square tube is sheared, so crushing or deformation of the square tube can be prevented. (4) When inserting and removing a square tube Since a sufficient gap is ensured between the rectangular tube and the die, the two-way workability is extremely good.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are perspective views of essential parts showing the principle of the present invention, FIG. 2 is an explanatory diagram of the configuration of essential parts showing an embodiment of the present invention,
FIG. 3 is an explanatory diagram of the main part structure showing an example of a canter drive device in an embodiment of the present invention, FIG. 4 is an explanatory diagram of the main part structure showing an example of a thrust support device in an embodiment of the present invention, (a
) or C) are respectively perspective views showing the cut shape of the end face of a square steel pipe, and FIGS. 6(a) and 6(b) are perspective views of essential parts showing press dies for processing or cutting the end face of the square steel pipe, respectively. 7 and 8 are perspective views showing an example of use of a square steel pipe, which is the object of processing of the present invention. 1: Square steel pipe, 10: Cutter, 12: Fixed die, 13
．． T8 Nislide die. Also leap number figure 7B. 0 sword ivy 12, swells. 15, +6: Also, the other side is the figure No. 10 Nia] No. 1-. +2; fil soldier 29゛i,
16: Nu, rai! Niai No. 5 Flesh form steel engineer

Claims (2)

[Claims] (1) A fixed die having a surface that contacts and supports the bottom surface and/or one side of the square tube, and a fixed die that has a surface that presses the other side of the square tube and is movable in a predetermined direction. a second slide die having a surface for pressing the upper surface of the rectangular tube and movable in a predetermined direction; and a cutter movable in a direction intersecting the axis of the rectangular tube. An apparatus for processing an end surface of a rectangular tube, characterized in that the cutter is configured to process the end surface of the rectangular tube into a plane that intersects with the axis. (2) The end face processing apparatus for a rectangular tube according to claim (1), wherein at least one of the slide die and/or the cutter is connected to a moving means operated by a cotter plate or a cam plate formed to be movable in a vertical direction.