KR102189316B1 - Cutting device with feed function of ring type material - Google Patents

Abstract

According to the present invention, a cutting apparatus with a function for transferring ring-type materials comprises: a cutting unit which cuts the ring-type materials by driving a saw; a materials mounting unit which includes a disc-shaped wheel plate, a connecting wheel which has a plurality of supports protruding from a surface circumference side of the wheel plate in a radial shape to support the materials, and a rotary part which rotates the connecting wheel when the saw is driven; and a materials transfer unit placed at a point facing the materials mounting unit with the cutting unit in between, which includes a standing body, a hanging part which includes a hanger protruding from the standing body towards the cutting unit for hanging the materials, and an elevating/lowering means which elevates/lowers the hanger, and a moving part which moves the standing body along a guide rail. In addition, the cutting unit includes: a supporter; a cutting body mounted on an upper end of the supporter to be rotatable around a hinge shaft, which has the saw; and a rotary part which rotates the cutting body. According to the present invention, the cutting apparatus with the function of transferring the ring-type materials has effects to efficiently cut ring-type materials with a high weight and a great diameter.

Description

Cutting device with ring-type material feeding function{CUTTING DEVICE WITH FEED FUNCTION OF RING TYPE MATERIAL}

The present invention relates to a cutting device having a ring-type material transfer function, and more particularly, when cutting a ring-shaped material having a shorter length but higher weight than a pipe more efficiently, the material is stably moved to a cutting position without unnecessary flow. In addition to supplying and discharging, it relates to a cutting device capable of firmly supporting the material while absorbing the impact generated when cutting the material.

The automatic cutting device is a device that cuts various types of pipes, such as straight lines and curves in general, and has a feature that it can cut more accurately than manual work and that the cut surface is clean.

Known pipe cutting devices have a structure suitable for cutting lightweight materials having a long length but small diameter and a low weight pipe shape.

As an example of the prior art for such a pipe cutting device, Korean Patent Registration No. 10-1636758 (name of the invention: orbital pipe cutting device capable of controlling a cutting tool in a rotating body using a rotational speed ratio) It is registered.

The prior art is coupled to any one side of the main body 110 while rotating while the pipe (P) is passed through the drive wheel 120 and the control wheel 130; A power transmission shaft 150 that is engaged with the control wheel 130 and protrudes through the drive wheel 120; A rod 155 in contact with the protruding tip of the power transmission shaft 150 so as to intersect with the protruding end of the power transmission shaft 150 so as to convert the horizontal rotational movement of the power transmission shaft 150 into a vertical rotational movement; A guide block 142 coupled to the front of the drive wheel 120 and converting the rotation of the rod 155 into a linear motion; A cutting tool 140 coupled to the guide block 142 to reciprocate (Y-axis) toward the pipe material P according to the rotational speed of the control wheel 130; And a chuck 200 installed on both the front and rear sides of the main body 110 to fix the pipe P, and controlling the cutting tool in the rotating body using a rotational speed ratio. It presents an orbital pipe cutting device.

The prior art relates to a pipe cutting apparatus, and it is published that it has a feature capable of cutting circular materials such as pipes using a rotational speed ratio.

However, this technique is not suitable for cutting material made of a ring type that is heavier than a pipe because the pipe is not heavy.

Therefore, it is necessary to develop a cutting device for a new and advanced ring-type material that can stably supply and discharge, that is, transport, to a cutting position while supporting more rigidly a ring-type material with high weight and large diameter. .

The present invention has been conceived to overcome the problems of the above technology, and its main object is to provide a cutting device capable of more efficiently cutting a special ring-shaped material having a large diameter, a heavy weight and a short length.

Another object of the present invention is to provide a connecting wheel capable of supporting transport while more stably supporting a ring-shaped material.

Another object of the present invention is to provide a transfer means capable of efficiently transferring a ring-shaped material.

A further object of the present invention is to provide a support means capable of absorbing the impact generated when the saw is driven while properly supporting a heavy material.

In order to achieve the above object, a cutting device having a ring-type material transfer function according to the present invention includes: a cutting unit for cutting a ring-type material by driving a saw; A material having a disk-shaped wheel plate and a connecting wheel having a plurality of radially protruding radially from the surface circumference side of the wheel plate to support the material, and a rotating part that rotates the connecting wheel when the saw is driven Mounting part; A hanger part disposed at a point facing the material mounting portion with the cutting portion interposed therebetween, and having a standing body, a hanger protruding from the standing body toward the cutting portion to hang the material, and an elevating means for raising and lowering the hanger; and And a material transfer unit having a moving part that moves the standing body along a guide rail.

In addition, the cutting unit is characterized in that it is rotatably mounted about a hinge axis at an upper end of the support, and comprises a cutting body having the saw and a rotating part that rotates the cutting body.

In addition, the wheel plate includes a core, a rail extending from the center of the core to a point where the support is formed, and a diameter adjustment bar movable along the rail, and the support protrudes from the diameter adjustment bar. It is characterized by being extended.

According to the cutting device having a ring-type material transfer function according to the present invention,

1) It can efficiently cut ring-shaped materials with a large diameter while having high weight,

2) It can be mounted on a connecting wheel while stably transferring a ring-shaped material that is difficult to transfer.

3) Even if the ring-shaped material has various diameters, not only can the connecting wheel support it while adjusting the diameter,

4) It supports the ring-shaped material with high weight, and has the effect of adequately absorbing the impact generated when the saw is driven while having durability.

1 is a photograph schematically taking the overall structure of the cutting device of the present invention.
Figure 2 is a front view showing the rotational state of the cutting unit and the arrangement structure of the connecting wheel of the present invention.
Figure 3 is a photograph taken of the configuration of the cutting part, the connecting wheel and the protection part of the present invention.
Figure 4 is a photograph showing the process of cutting the ring-type material.
5 is a photograph showing a process in which the ring-type material is transferred.
Figure 6 is a side view showing an operating state of the material mounting portion and the material conveying unit before cutting the material.
7 is a side view showing an operating state of the material mounting portion and the material conveying unit after cutting the material.
Figure 8 is a flow chart showing the manufacturing process of the resin base included in the buffer bar of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and the same reference numerals in each drawing refer to the same elements.

1 is a photograph schematically photographing the overall structure of the cutting device of the present invention, FIG. 2 is a front view showing the rotational state of the cutting part and the arrangement structure of the connecting wheel, and FIG. 3 is a cutting part of the present invention and This is a picture of the composition of the connecting wheel and the protector.

In the present invention, the object to be cut, which is an object to be cut by the cutting unit, is referred to as'material' (1). This material (1) has a particularly large diameter and a high weight and has a shorter length than a general pipe. It has a ring-like shape, and the cutting part 10 of the present invention serves to cut the material in a manner of dividing the material into two and three divisions based on the longitudinal direction of the ring-shaped material 1.

At this time, in order to cut the ring-shaped material 1 having a high weight in the longitudinal direction, there is a difficulty in that the saw must be driven while properly supporting the material 1, and the cutting device of the present invention is the material 1 By supporting the connecting wheel 100 to have a vertical state instead of lying down, it provides a function to secure the convenience of driving the saw 11 and then safely supply and discharge materials to the connecting wheel 100 It is characterized by the main feature.

As can be seen from FIGS. 1 and 2, the cutting device of the present invention includes a saw 11 to cut the ring-type material 1, and the saw of the cutting part 10 is driven. With the ring-type material 1 positioned in the area, the material is supplied to the material mounting part 200 that supports the material 1 and the material mounting part 300 before cutting the material 1 while cutting the material. After the material is made of a material transfer unit 300 that lifts and discharges the material from the material mounting unit 200, it is possible to additionally include a protection unit 400.

The cutting part 10 of the present invention cuts (cuts) the ring-type material 1 by driving the saw 11 while the saw 11 is provided, and has various known shapes such as circular saws and band saws. It is possible to provide a saw drive means for driving the saw 11 as well as any one of the saws 11.

In the accompanying drawings, the cutting area can be variously changed according to the diameter of the ring-shaped material (1), as well as the cutting part to more accurately cut the short-length cutting area due to the nature of the ring-shaped material (1). (10) exemplifies a structure in which the tee top is circulated by rollers while rotating up and down around the hinge.

Specifically, the cutting part 10 according to FIGS. 1 to 3 includes a support 12 and a hinge 13, a rotation drive part 14 and a cutting body 15. As described above, the cutting unit 10 may be provided with a saw 11 having various structures, and in the present invention, an embodiment in which the saw is made of a band saw will be exemplarily described.

The support 12 refers to a structure that is erected at a predetermined height from the floor, and the hinge 13 performs a function of rotatably connecting the cutting body 15 around it at the upper end of the support 12. The cutting body 15 includes a band saw 11 as well as a roller capable of circulating and rotating the band saw 11 in a state that is extended as long as the extended length of the band saw 11, and a saw driving means for controlling the driving of such rollers. do.

The rotation drive part 14 provides a function of moving the cutting body 15 up and down around the hinge 13. Although various means exist for the specific mechanical structure of the rotation drive part 14, in the present invention, it is exemplified that the rotation drive part 14 consists of a hydraulic cylinder and a cylinder driving part that controls the expansion and contraction of the hydraulic cylinder.

According to the structure of the cutting part 10, the rotation driving part 14 adjusts the height and rotation angle of the cutting body 15 around the hinge 13 according to the diameter of the material, while the cutting body 15 After raising, the band saw 11 is driven under the control of the saw driving means to cut the material 1 mounted on the connecting wheel 100. As mentioned above, the diameter of the ring-shaped material 1 In addition, it is possible to variously change the position or area to be cut according to, as well as provide a characteristic capable of cutting the material 1 more precisely by circulating drive of the te-top 11.

The material mounting part 200 of the present invention is composed of a connecting wheel 100 supporting the ring-type material 1 and a rotating part 210 that rotates the connecting wheel 100, and additionally connecting wheel ( 100) and the rotating part 210 may be provided with a moving part 220 for moving forward and backward toward the cutting part 10.

The connecting wheel 100 is made of a shape similar to a vehicle wheel, that is, a wheel, and is largely composed of a wheel plate 110 and a support 120.

The wheel plate 110 is a structure made of a disk shape, and is rotatably supported by a rotating part 210 connected to the center of the rear side when the surface facing the cutting part 10 among both sides of the wheel plate is referred to as the front. have.

The circumferential area of the front side of the wheel plate 110, strictly radial at a certain distance from the circumference to the center side, is a total of four, referring to the drawing, at 90 degrees from the center of the wheel plate 110. At an angle, a support 120 protruding toward the cutting part 100 is provided so as to be longer than the length of the material.

The support 120 functions to support the material so that the ring-type material 1 comes into contact with the outer surface thereof, and in more detail, the material is supported in a manner that spans a plurality of supports 120. In other words, since the support 120 is radially formed in all directions based on the center of the wheel plate 110, even if the wheel plate 110 rotates while the material 1 is over the outer surface of the support 120, gravity It can prevent the problem of falling in one direction or deviating in another direction.

In addition, the wheel plate 110 is a plate-shaped body forming a central region, and a core 111 to which the rotating part 210 is connected to the rear surface thereof, and a plurality of wheel plates 110 extending outwardly at a predetermined interval around the core 111 It consists of a spoke 112 and a rim 113 that forms the rim of the wheel plate 110 while connecting the ends of the spokes 112.

At this time, the wheel plate 110 is a point where the support 120 is formed at the center of the front side of the core 111, and in the drawing, the rail 114 extends to a total of four points, and the rail 114 is movable along the rail 114 As a result, a diameter adjustment bar 115 in contact with the inner surface of the support 120, that is, the surface toward the center of the wheel plate 110 may be further included. In this case, the support 120 may also be mounted on the rail 114 so as to be movable along the rail 114 or may protrude from the diameter adjustment bar 115.

The diameter adjustment bar 115 may be rigidly fixed to a specific point of the rail 114 through a separate fixing means. The diameter adjustment bar 115 is able to change the position of the support 120 while moving along the rail 114, thereby being compatible with the various diameters of the material 1 and the supporter from the center of the wheel plate 110 ( The distance to 120) can be adjusted, and as a result, the position of the support 120 is adjusted to be compatible with various diameters of the material, thereby providing a function of stably supporting the material 1 through the support 120.

The rotating part 210 of the material mounting part 200 extends a certain length while being connected to the center of the rear surface of the wheel plate 110, specifically, the core 111, and has a cylindrical support body 211 and the support body. It includes a rotating rod 212 rotatably mounted in the hollow of 211 by driving of a motor via a bearing.

This rotating part 210 may be supported by a moving table 221 located on the support plate 230 seated on the floor, and this moving table 221 corresponds to a part of the moving part 220 to be described later. do.

This rotating part 210 has a function of rotating the connecting wheel 100 on which the material 1 is mounted so that the saw 11 evenly contacts the circumferential surface of the material 1 along the entire circumference of the material. to provide. At this time, the rotation speed of the connecting wheel 100 may be adjusted while controlling the number of rotations of the motor according to the strength of the saw 11, the driving force of the saw 11, the strength of the material, and the like.

Additionally, the material mounting part 200 may include a moving part 220 for moving the connecting wheel 100 and the rotating part 210.

The moving part 220 extends in a vertical direction with the cutting part 10 from the upper surface of the support plate 230 supported on the floor in order to stably support the total weight of the connecting wheel 100 and the moving part 220. It is movable along the mounted guide rail 222 so that the moving table 221 supporting the rotating part 210 (specifically, the support body) and the moving table 221 can move along the guide rail 222 It is provided with a hydraulic cylinder 223 that expands and contracts.

That is, by the expansion and contraction driving of the hydraulic cylinder 223, the moving table 221 connected to one side of the hydraulic cylinder 223 is moved along the guide rail 222, and as a result, the support body supported by the moving table 221 As well as 211, the connecting wheel 100 connected thereto may also be moved forward or backward along the guide rail 222 so as to be closer to or away from the cutting part 10, that is, toward the cutting part 10.

In other words, the connecting wheel 100 and the rotating part 210 may be fixedly mounted in any position, but the material transfer unit 300 to be described later provides a function of stably supplying and discharging the ring-type material 1 Since it is necessary to move the connecting wheel 100 forward or backward toward the cutting part 10 in order to promote its role, it can be said that it is more preferable that the material mounting part 200 includes the moving part 220.

The material conveying unit 300 of the present invention performs a function of supplying and discharging the ring-type material 1 to the connecting wheel 100, and facing the material mounting unit 200 with the cutting unit 10 interposed therebetween. It is placed on the branch.

The material conveying part 300 is largely composed of a standing body 310, a hook part 320, and a moving part 330.

The standing body 310 is a structure that is erected at a predetermined height on the guide rail 331 of the moving part 330, and a hook part 320 is provided on the upper side of the surface facing the cutting part 10, and The hydraulic cylinder 332 of the moving part 330 is connected to the lower part.

As described above, the hanger part 320 includes an extension 321 protruding horizontally from the top of the surface facing the cutting portion 10 of the standing body 310 and a horizontal extension at the end of the extension 321 It further protrudes in the direction and includes a hanger 322 mounted to move up and down, that is, elevating, and an elevating means 323 for elevating the hanger 332.

It is possible to provide a plurality of hooks 322 at regular intervals in the vertical direction, but in the drawing it is illustrated that it is made of two.

The lifting means is to provide a function of lifting the hanger 322, for example, it is possible to be implemented as a hydraulic cylinder 323 extending in the vertical direction from one side of the extension 321 as shown in the drawing. The hanger 322 is connected to the hydraulic cylinder 332 via a mechanical power transmission means such as a link, and the hanger 322 may be raised or lowered by the operation of the hydraulic cylinder 332.

The moving part 330 of the material conveying part 300 is a guide rail 331 mounted so as to extend in a direction from the upper surface of the support plate 230 toward the cutting part 10, like the moving part 220 of the material mounting part 200. ), and a hydraulic cylinder 332 for moving the standing body 310 along the guide rail 331.

That is, the standing body 310 is movably mounted on the guide rail 331, and the hydraulic cylinder 332 is connected to the lower surface of the standing body 310 facing the cutting part 10 side, so that the hydraulic cylinder 332 ) By the operation of the standing body 310 may move along the guide rail 331.

Additionally, it is possible for the cutting device of the present invention to include a protection part 400.

The protection part 400 is a structure protruding from the bottom side around which the connecting wheel 100 is rotated to be spaced apart from the left and right lower regions of the connecting wheel 100 by a predetermined distance, and the protection part 400 cuts the material 1 In the process of doing so, it plays a role as a kind of protective film or curtain to prevent unnecessary splashing of the debris around it. The shape of the protection part 400 can be made in various ways, and the drawing shows that the long side is formed stepwise in a stepwise manner while the cross section has a shape such as a right triangle.

Hereinafter, the operation of the cutting device of the present invention will be described with reference to the accompanying drawings.

4 is a photograph showing a process in which a ring-type material is cut, FIG. 5 is a photograph showing a process in which the ring-type material is transferred, and FIG. 6 is a side view showing an operating state of the material mounting unit and the material transfer unit before cutting the material And FIG. 7 is a side view showing an operating state of a material mounting unit and a material transfer unit after cutting the material.

6 and 7, it is illustrated that the material mounting portion 200 includes the moving part 220, which will be described based on this.

First of all, in the initial state, both the material mounting part 200 and the material transfer part 300 are located at a point spaced apart from the cutting part 10 based on the cutting part 10, and at this time, the hanger 322 of the material transfer part 300 has a ring Type of material (1) is hung.

When the cutting device of the present invention is operated in earnest, the material mounting part 200 and the material conveying part 300 are brought close to the cutting part 10 side by driving of the respective moving parts 220 and 330, and finally the material conveying part 300 While the hook 322 contacts the support 120 of the connecting wheel 100, the ring-type material 1 is brought into contact with the outer surface of the support 120 of the connecting wheel 100, that is, four supports 120 As a result, the material 1 is handed over to the connecting wheel 100 so as to span the support 120 while wrapping. In other words, as the hanger 322 descends, it means that the material 1 spanning the hanger 322 is handed over to the support 120 of the connecting wheel 100.

When the material 1 is mounted on the connecting wheel 100 in this way, the material conveying unit 300 moves backward in a direction away from the cutting unit 10.

As can be seen from FIG. 4, the saw 11 is driven when the cutting body 15 of the cutting part 10 is rotated upward at a certain angle, and then the saw 11 is driven and the connecting wheel 100 adjacent thereto rotates. During the process, the material 1 rotates to perform cutting along the circumferential surface of the material 1 by the operation of the saw 11.

When the cutting of the material 1 is completed, the material transfer unit 300 advances in the direction of the cutting unit 10 again to bring the hanger 322 to the connecting wheel 100, and then when the hanger 322 is raised, the connecting wheel ( The material 1 mounted on 100), that is, the cut materials, is caught on the hanger 322, and the material transfer unit 300 moves backwards in a direction away from the cutting unit, thereby moving the cut materials to the outside.

According to such a configuration and operation, the cutting apparatus of the present invention can provide a feature capable of more efficiently cutting and transferring a ring-type material 1 having a high weight and a high diameter.

Figure 8 is a flow chart showing the manufacturing process of the resin base included in the buffer bar of the present invention.

The support 120 not only supports the high-weight material 1 during the cutting process, but also needs to sufficiently withstand the vibration transmitted from the saw 11 during the cutting process.To compensate for this, the support 120 is a buffer bar 121 It is possible to additionally include ).

Specifically, the support 120 is provided with a recessed groove 122 that is recessed to a predetermined depth along the length direction of the surface contacting the material and the outer surface, and the buffer bar 121 is mounted in the recessed groove 122 , The buffer bar 121 protrudes from the outer surface of the support 120 and has a foundation capable of sufficiently contacting the material 1.

The buffer bar 121 is more preferably made of a functional synthetic resin material rather than a metal material so that it is durable and does not cause scratches on the material and can adequately absorb impact.

To this end, preferably, the buffer bar 121 may have high durability and elasticity by including a resin base including an epoxy resin. At this time, the buffer bar 121 may be made of only a resin base, but other additives may be included together to improve the physical properties of the buffer bar 121.

Such a resin base may be manufactured through an intermediate material manufacturing step and a resin base completion step, and a specific manufacturing method is as follows.

First, the intermediate material manufacturing step is a mixture of 50 to 70 parts by weight of an epoxy resin, 10 to 20 parts by weight of polyketone fiber, and 1 to 10 parts by weight of a composite containing chloroprene rubber, and then at 80 to 100°C. It is a process of preparing an intermediate material by heating for 15 minutes.

Here, the epoxy resin is a polymer compound synthesized by a condensation reaction of an epoxy and an amine, and has two or more epoxy groups, and can form a three-dimensional structure through a crosslinking reaction with various curing agents. These epoxy resins are used for adhesion, coating, casting, etc., and are also widely used in the electricity, aerospace, automobile, and construction industries. In addition, polyketone fibers are manufactured by spinning a copolymer synthesized from ethylene and carbon monoxide, and are materials with high tensile strength, impact strength, and recovery power. In addition, the composite is made of chromophrene rubber and has excellent elastic restoring power and mechanical properties, and is included in the resin base to effectively absorb the impact generated during cutting and to help prevent damage such as tearing of the buffer bar. Can be A specific method of manufacturing such a composite will be described later.

Next, in the resin base completion step, 85 to 90 parts by weight of an intermediate material and 1 to 10 parts by weight of a reinforcing agent including methyl methacrylate are mixed, followed by heating at 150 to 180° C. for 20 to 40 minutes, and then 20 to 30 parts by weight. It is the process of cooling to ℃ to complete the resin base. Here, the reinforcing agent can increase the glass transition temperature in the resin base, enhance thermal stability, and improve flexural strength and impact strength. Therefore, the reinforcing agent can effectively prevent a tear phenomenon caused by the buffer bar fixing the cutting object.

Since the resin base manufactured through this process includes an epoxy resin, a composite, and a reinforcing agent, it can have excellent heat resistance, elastic resilience, and impact strength. Therefore, the buffer bar includes such a resin base to support the cutting object. It can be prevented from being damaged from the impact of heat and friction generated during the operation.
As described so far, the configuration and operation of the cutting device having a ring-type material conveying function according to the present invention has been expressed in the above description and drawings, but this is only described as an example, and the spirit of the present invention is shown in the description and drawings It is not limited, and of course, various changes and changes are possible within the scope of the technical spirit of the present invention.

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1: material 10: cutting part
11: Top 12: Support
13: hinge 14: rotating drive part
15: cutting body 100: connecting wheel
110: wheel plate 111: core
112: spoke 113: rim
114: rail 115: diameter adjustment bar
120: support 121: buffer bar
122: recessed groove 200: material mounting portion
210: rotating part 211: support body
212: rotating rod 220: moving part
221: mobile platform 222: guide rail
223: hydraulic cylinder 230: base plate
300: material transfer unit 310: standing body
320: hook part 321: extension
322: hook 323: lifting means
330: moving part 331: guide rail
332: hydraulic cylinder 400: protection unit

Claims (8)

As a cutting device equipped with a ring type material transfer function,
A cutting part for cutting the ring-type material by driving the saw;
A material having a disk-shaped wheel plate and a connecting wheel having a plurality of radially protruding radially from the surface circumference side of the wheel plate to support the material, and a rotating part that rotates the connecting wheel when the saw is driven Mounting part;
A hanger part disposed at a point facing the material mounting portion with the cutting portion interposed therebetween, and having a standing body, a hanger protruding from the standing body toward the cutting portion to hang the material, and an elevating means for raising and lowering the hanger; and Including; a material transfer unit having a moving part for moving the standing body along the guide rail,
The above support,
A recessed groove recessed to a predetermined depth along the longitudinal direction of the outer surface, and a buffer bar including a resin base containing an epoxy resin as inserted into the recessed groove to protrude from the outer surface,
The resin base,
After mixing 50 to 70 parts by weight of epoxy resin, 10 to 20 parts by weight of polyketone fiber, and 1 to 10 parts by weight of a composite containing chloroprene rubber, heating at 80 to 100°C for 5 to 15 minutes to An intermediate material preparation step of preparing a material;
After mixing 85 to 90 parts by weight of the intermediate material and 1 to 10 parts by weight of a reinforcing agent including methyl methacrylate, heating at 150 to 180°C for 20 to 40 minutes and cooling to 20 to 30°C to obtain a resin base Completing the; characterized in that produced through, cutting device. The method of claim 1,
The cutting part,
With support,
A cutting body provided with the saw to be rotatably mounted on a hinge at the upper end of the support, and
A cutting device, characterized in that consisting of a rotation drive part for rotating the cutting body. The method of claim 1,
The material mounting portion,
A cutting device comprising a moving part for moving the connecting wheel and the rotating part along a guide rail. The method of claim 1,
The wheel plate,
With the core,
A plurality of rails extending from the center of the core to a point where the support is formed, and a diameter adjustment bar movable along the rail
The support, characterized in that the protruding extending from the diameter adjustment bar, cutting device. delete delete delete delete

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