JPH0410976Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pipe cutting device that can continuously cut pipes by shearing at twice the speed of conventional pipes.

(Conventional technology and its problems) It is said that the processing accuracy during cutting is at an all-time high, and shearing is said to take the shortest processing time when cutting materials. Therefore, shearing is used to cut plates, but pipes are cut using lathes (furthermore, when making large quantities of pipes of a certain size,
Programming cutting is performed using automatic lathes. ), cutting was mostly done by grinding with a grinder, and cutting by shearing was not adopted because it would crush the pipe. However, cutting processing takes too much time, whether it is lathe processing or grinder cutting processing, and when applied to mass-produced products, even if automatic lathes are used, this poor processing efficiency becomes a major cause of increased costs. Therefore, there has been an increasing demand for pipe shear processing to further reduce processing costs. Therefore, in the past, one shearing blade was arranged and slid against one fixed blade, and the pipe inserted from the fixed blade into the shearing blade was sheared so that the float pin in the fixed blade and the fixed pin in the shearing blade coincided. The pipe was sheared on the surface.
In this case, since there is only one fixed blade and one shearing blade, there is a problem that while the shearing blade is moving, there is idle time, resulting in work loss.

(Purpose of the present invention) The present invention was devised in view of the conventional situation, and its purpose is to provide an extremely high-performance pipe cutting device that can shear pipes at twice the speed of conventional pipe cutting equipment. There is something to do.

(Means for solving the problem) In order to achieve the above object, a plurality of shearing blades 5 are arranged slidably with respect to the fixed blade 4 in the pipe shearing section d.

A pipe insertion hole 6 is bored in the fixed blade 4 and each shearing blade 5.

Fixing pins 2 are disposed in the pipe insertion holes 6 on the sides of the shearing blades 5, respectively.

The tip of the fixed pin 2 is aligned with the sliding surface of the shearing blades 5..., and the pipe 1 is inserted into the pipe insertion hole 6 of the fixed blade 4 and the shearing blade 5 that is stopped in alignment with the fixed blade 4.

By inserting the pipe 1 into the fixed pin 2, bringing the float pin 3 inserted into the pipe 1 into contact with the tip of the fixed pin 2, and sliding the shear blades 5...
Shearing occurs at the contact surface between the fixed pin 2 and the float pin 3.

; is adopted as a technical means.

(Function) First, the pipe 1 being wound up at the pipe winding section a is pulled out.

Although the pipe 1 immediately after being pulled out is curved due to the effect of winding, the pipe 1 is applied with a straightening roller 12 at the pipe straightening section b to straighten it into a straight line.

Next, the pipe 1 is fed one pitch at a time to the pipe shearing section d at the pipe feeding section c.

In the pipe shearing section d, the fixed pin 2 is inserted into the pipe 1 on the shearing blade 5 side, and the float pin 3 is inserted on the fixed blade 4 side.

The first shearing blade 5a is slid to shear the pipe 1 at the contact surface of the float pin 3 with respect to the fixed pin 2.

The first shearing blade 5a stores the sheared pipe 1
stops at the first ejecting position adjacent to the fixed blade 4, operates the first cylinder 10a, and moves the sheared pipe 1 through the ejecting pin 9 to the first ejecting position.
It protrudes from the shearing blade 5a.

During this time, the second shearing blade 5a was slid simultaneously with the first shearing blade 5a.
The shearing blade 5b stops in line with the fixed blade 4, and the first
Like the shearing blade 5a, the pipe 1 is inserted and is in a shearing standby state.

When the above-mentioned pipe ejection is completed, the first shearing blade 5a slides toward the fixed blade 4, and the second shearing blade 5b sliding at the same time shears the pipe 1 to a second ejecting position adjacent to the fixed blade 4. Stop at .

In this way, the pipe 1 is sheared in a reciprocating manner, and conventional double-speed shearing is performed.

(Example) The present invention will be described in detail below with reference to illustrated embodiments.

The material of the pipe 1 used in the present invention is mainly metals such as iron, copper, and aluminum, but other types may be used as long as they can be sheared.
Further, its cross-sectional shape is generally circular, but of course it may also be square, triangular, or hexagonal. The supplied pipe 1 may be straight, but
It may also be wound into a coil. In this embodiment, the case where the film is wound up will be mainly explained.

To outline the pipe cutting device A according to this embodiment, as shown in FIG. 1, it is composed of a pipe winding section a, a pipe straightening section b, a pipe feeding section c, and a pipe shearing section d. , If necessary, a forming part e will be placed following the pipe shearing part d. The pipe 1 described above is wound around the pipe winding section a, but the pipe 1 coming out of the pipe winding section a is curved due to the influence of the pipe winding section a, and in order to be supplied to the pipe shearing section d. must be straightened and placed in a straight line. That is, in the pipe straightening section b, a plurality of straightening rollers 12 are arranged in a staggered manner around the pipe feeding line, and in order to forcibly repeatedly bend the pipe 1 passing through the pipe straightening section b, ( In other words, the pipe 1 is made to meander over the straightening roller 12.) The straightening roller 12 is arranged so that the contact portion with the pipe 1 slightly protrudes from the pipe feeding line. The correction rollers 12 may be arranged to match the curved surface of the pipe 1, but for safety, they may be arranged in a direction perpendicular to the curved surface.
The contact surface of the straightening roller 12 with the pipe 1 is the pipe 1
It is molded to match the external shape of. The pipe 1 that has passed through the pipe straightening section b and has been straightened into a straight line reaches the next pipe feeding section c.

In the pipe feeding section c, one or more pairs of feeding rollers 13 are arranged on both sides of the pipe feeding line, and they sandwich the pipe 1 and rotate one pitch at a time to send the pipe 1 to the shearing section d. It's becoming like that. In order to prevent the pipe 1 from collapsing, the feed rollers 13 are made of rubber or their number is increased to prevent the clamping force between the pair of feed rollers 13 from becoming excessive. In addition, in order to prevent the movement of the float pin 3, which will be described later, from being pinched and restricted, the pinching portion of the feed roller 13 is attached to the float pin 3.
I try not to worry about it.

FIG. 2 shows a first embodiment of the pipe shearing section d, which includes a fixed blade 4 and a pair of shearing blades 5 arranged horizontally opposite to the fixed blade 4 and sliding in contact with the front surface of the fixed blade 4. It is composed of... Fixed blade 4 is fixed base 7
The shearing blades 5 are mounted on the sliding base 8 side by side. The fixed blade 4 and the shearing blade 5 are each provided with a pipe insertion hole 6 having a shape that allows shearing of the pipe 1. (Of course, it is desirable that the pipe insertion hole 6 to be drilled has the same external shape as the pipe 1 to be cut.) A fixing pin 2 is disposed in the pipe insertion hole 6 of the shearing blade 5, and the end is pinned. has been done.
The ejection pin 9 is slidably inserted into the pipe insertion hole 6 so as to hold the fixing pin 2 with its split pin portion. The external shape of the fixing pin 2 is selected to have a cross-sectional shape that prevents the pipe 1 from being crushed when the pipe 1 is sheared. (Of course, it is desirable that its cross section be equal to the inner shape of the pipe 1.) The tip of the fixing pin 2 matches the sliding surface of the shearing blades 5. A fixed base 7 is disposed in front of the fixed blade 4 in line with the fixed blade 4, and the shearing blade 5 of the pipe 1...
A stopper roller 11 is attached that defines the insertion distance. On both sides of it, there are first and second cylinders 10a, 1 corresponding to the protruding position of the shear pipe 1.
0b is placed.

Then, the pipe 1 is pulled out from the pipe winding part a, and forcedly bent repeatedly over the straightening rollers 12 to straighten it into a straight line.
Rotate the feed roller 13 and apply 1 to the pipe shearing part d.
Supply one pitch at a time.

In the pipe shearing section d, the first shearing blade 5 is attached to the fixed blade 4.
Align the pipe insertion holes 6 of a, and then insert the pipe 1
A float pin 3 having a cross section capable of shearing is passed through the pipe 1 (of course, it is preferable that the float pin 3 has an outer shape equal to the inner shape of the pipe 1), and the pipe 1 is forcibly inserted into the pipe insertion hole 6. Then, the tip of the pipe 1 is brought into contact with the end face of the ejecting pin 9, and the pipe is pushed out until the ejecting pin 9 comes into contact with the stopper roller 11. As a result, the insertion allowance for the pipe 1 is determined. When the sliding base 8 is moved in this state, the pipe 1 is sheared in alignment with the sliding surface (that is, the contact surface between the fixed pin 2 and the float pin 3). At this time, the inner and outer surfaces of the pipe 1 are fixed blades 4 and shear blades 5...
Pipe insertion hole 6, float pin 3, fixing pin 2
Since they are each restrained by , they can be sheared without collapsing, just like a solid material. The first shearing blade 5a storing the sheared pipe 1 stops at a first protruding position adjacent to the fixed blade 4,
At this position, the first cylinder 10a is operated to eject the sheared pipe 1 to the outside via the ejection pin 9. During this time, the second shearing blade 5b
The pipe 1 is inserted into the pipe insertion hole 6 of the second shearing blade 5b by the same operation as in the case of the first shearing blade 5a, and waiting for the start of shearing. First shearing blade 5a
When the protrusion of the pipe 1 is finished, the first shearing blade 5a slides again and comes to match the fixed blade 4, but in conjunction with this movement, the second shearing blade 5b moves to the second shearing blade 5b adjacent to the fixed blade 4. 2 Move to the ejection position.
At this time, the pipe 1 is sheared, and when the second shearing blade 5b matches the second ejecting position and stops, it is ejected by the ejecting pin 9 in the same manner as described above.
In this way, pipe 1 is cut at twice the speed of the conventional method. When the cutting process is completed, the sheared pipe 1 is transferred to the next process.

Note that while the shearing blades 5 are sliding, the float pin 3 and the pipe 1 are in sliding contact with the top surface of the sliding base 8, so the pipe 1 does not protrude, and the pipe 1 does not protrude during shearing.
The float pin 3 is fixed to the pipe 1 by slight plastic deformation of the sheared end of the float pin 3, and the float pin 3 does not protrude from the pipe 1. Therefore, in principle, there is no need to prevent the float pin 3 from protruding.

FIG. 3 shows a second embodiment of the present invention, in which forming parts e such as dies, nut formers, parts formers, and headers are provided on both sides of the fixed blade 4, and the protruding pipe 1 is transferred to the forming parts e. After that, it is crushed and plastically worked to a predetermined size. Plastic processing includes not only heading processing as mentioned above, but also swaging processing,
Forming processing or other processing may also be used. The pipe 1 that has been plastically worked in the forming part e is pushed out by an extrusion pin housed in the forming part e, and is recovered as the final product of this process. In addition, the forming part e is not only one stage,
In some cases, multiple stages are used to increase the degree of plastic working, either as is or while being reversed, to produce the final product.

In this embodiment, two shearing blades 5 are arranged in front of the fixed blade 4 to forcibly protrude the pipe 1, but the present invention is not limited to this. The blades 5 may be arranged and fed by forced feeding or by falling under their own weight as described above.

Further, in this embodiment, a case is shown in which there are two shearing blades 5, but the present invention is of course not limited to this, and two or more shearing blades 5 can be fitted on the same circle of the rotating ring to shear the pipe 1 in a rotating revolver style. You may do so.

Also, if there is only one type of final product, the same goes for pipes, but if the amount of materials required for two or more types is different, it is natural that pipe 1 will be used.
The shearing allowance will also change. Therefore, it becomes necessary to change the shearing allowance of the pipe 1, but in that case, the position of the reference stand and the length of the ejecting pin 9 are appropriately changed to determine the protruding allowance of the pipe 1.

(Effects) As described above, the present invention has a plurality of shearing blades slidably arranged relative to the fixed blade in the pipe shearing section, and pipe insertion holes are bored in the fixed blade and each of the shearing blades. Place a fixed pin in each pipe insertion hole on the shearing blade side, align the tip of the fixed pin with the sliding surface of the shearing blade, and insert the fixed pin into the pipe insertion hole of the shearing blade that has stopped in line with the fixed blade. At the same time as inserting the pipe, the pipe is inserted into the fixed pin, the float pin inserted into the pipe is brought into contact with the tip of the fixed pin, and the shearing blade is slid, so that the contact surface between the fixed pin and the float pin is used as a shearing surface. Therefore, by sliding a plurality of shearing blades in conjunction with each other, it is possible to shear the pipe in a reciprocating manner, and as a result, high-speed cutting work that is twice as fast as the conventional method is possible.

[Brief explanation of the drawing]

Fig. 1: Schematic process diagram of the present invention; Fig. 2: sectional view of the first embodiment of the pipe shearing section of the present invention; Fig. 3:
Figure: A sectional view of a second embodiment of the pipe shearing section of the present invention. A... Pipe cutting device, a... Pipe winding section, b... Pipe straightening section, c... Pipe feeding section,
d... Pipe shearing part, e... Forming part, 1
... Pipe, 2 ... Fixed pin, 3 ... Float pin, 4 ... Fixed blade, 5 ... Shearing blade, 5a ... First
Shearing blade, 5b... Second shearing blade, 6... Pipe insertion hole, 7... Fixed base, 8... Sliding base, 9... Ejection pin, 10a... First cylinder, 10b
...Second cylinder, 11...Stotsupakoro, 12
...Correcting roller, 13...Feeding roller.

Claims (1)

[Claims for Utility Model Registration] (1) In the pipe shearing section, a plurality of shearing blades are slidably arranged relative to the fixed blade, and a pipe insertion hole is bored in the fixed blade and each shearing blade, Place a fixed pin in each pipe insertion hole on the shearing blade side, align the tip of the fixed pin with the sliding surface of the shearing blade, and insert the fixed pin into the pipe insertion hole of the shearing blade that has stopped in line with the fixed blade. At the same time as inserting the pipe, the pipe is inserted into the fixed pin, the float pin inserted into the pipe is brought into contact with the tip of the fixed pin, and the shearing blade is slid, so that the contact surface between the fixed pin and the float pin becomes the pipe shearing surface. A pipe cutting device characterized by: (2) A pipe winding section that winds the pipe into a coil, a pipe feeding section that pulls out the pipe from the pipe winding section and feeds the pipe one pitch at a time to the pipe shearing section, and a pipe winding section and the pipe feeding section. and a pipe straightening section for straightening a curved pipe immediately after being pulled out from the pipe winding section, as a pre-process of the pipe shearing section. A pipe cutting device according to claim 1 of patent registration. (3) The pipe cutting device according to claim 1, which is a utility model registration, characterized in that an ejecting pin for ejecting the cut pipe is disposed in the pipe insertion hole on the shearing blade side. (4) As a post-process of pipe shearing, a cylinder for ejecting the shearing pipe is arranged behind the shearing blade at the stopping position of the shearing blade, as stated in claim 1 of the utility model registration claim. pipe cutting equipment. (5) Utility model registration claim 1, which is characterized in that, as a post-process of pipe shearing, a forming part such as a die or a nut former is arranged opposite the shearing blade at the stopping position of the shearing blade. The pipe cutting device described in .