KR102148580B1 - Adjustable angle vise and pipe notcher using the same. - Google Patents

Abstract

The present invention relates to an adjustable angle vise that is a fixing device capable of performing a task requiring assembly and welding between materials and pipe notching of a tubular material at a fixed position by setting a specific angle, and in more detail Step clamp 400 attached to the first mounting surface 140 and the second mounting surface 150 by setting the angle using the developed displacement angle of the gear 1 surface 100 and the gear 2 surface 110 that are driven and rotated A pair of protractor sets 120 and a pair of protractor sets 120 in which the corresponding angle leader line is marked, and an angle confirmation window 130 that can confirm that the angle is set are provided to fix the material by utilizing the and binding devices (440A/B). Control for the purpose of providing the operator's convenience by obtaining various types of finished products and efficient use of the work range by implementing various ranges of angles that can be set and accurately and intuitively checking and changing the set angle. It's about my brother angle vise.

Description

Adjustable angle vise and pipe notcher using it {ADJUSTABLE ANGLE VISE AND PIPE NOTCHER USING THE SAME.}

The present invention relates to an adjustable angle vise that is a fixing device capable of performing a task requiring assembly and welding between materials and pipe notching of a tubular material at a fixed position by setting a specific angle, and in more detail The angle is set using the displacement angle of the external gear that is driven and rotated, and the material can be fixed using a step clamp and a binding device attached to the extension plane of the external gear, and a pair of indicator lines of the corresponding angles are marked. The angle confirmation window is provided to confirm the setting of the protractor and angle of the set angle, and it is possible to actively respond to changes and accurate and intuitive confirmation of the set angle. It relates to an adjustable angle vise for the purpose of providing operator convenience due to efficient use.

In general, after setting a specific angle, assembling, welding, and pipe notching of tubular materials are required through fixing and maintaining between materials, so a number of finished products are uniformly formed with conventional methods and products. A jig table for manufacturing and various types of fixing tools using the same are moved and arranged to bind the materials, and then the assembly or welding work of the finished product has been performed by holding the materials fixed. In addition, in order to manufacture a small number of various types of finished products, after performing direct pre-welding between materials based on a separate workbench, correcting the settings and performing the main welding work, or after temporarily pre-welding the materials to the workbench. This welding operation has been performed while securing a fixed position between materials. In addition to these methods, the assembly or welding work of the finished product is performed by binding the materials with a fixed clamp, a vise that moves by reciprocating a single straight line on the plane, and an angle-fixed type and angle-adjustable angle vise that uses two axes intersecting on the plane. Has been.

In addition, an angle vise is used that binds the material using a jaw in the form of a bite and an angle block processed at a fixed angle such as 22.5', 45', 90', 135', .., etc.

In addition, when performing pipe notching to make a groove or cut out a specific part of the tubular material, 3D laser cutting processing or hydraulic/pneumatic equipment is installed, and press processing using dies and a manual tool, Pipe Notching ( Pipe Notcher) has been carried out through gas cutting and grinding processing by using a drill, a hole saw, or an end mill to mark the processing part directly on the material.

As the finished products obtained from the use of such conventional methods and products, transportation facilities such as bus stops, guide signs, barrier installations, etc., which are structures welded using structural steel materials such as square pipes or steel pipes, and bicycle storage stands, and There are public facilities such as park chairs, indoor and outdoor furniture for office and residential facilities, indoor and outdoor advertisements, and sculptures based on personal hobbies or plans.

However, as the manufacturing work of the finished product as described above is in progress, the angle determined by the vise, which is a fixing device between materials, and the deployment range for realization of the angle to be set are limited, so it is difficult to manufacture a number of finished products in various forms. The process of setting up is complicated and requires a lot of time. In addition, as the continuous work is performed at a specific location, the fatigue of the worker due to the constraint of the working posture increases, and the difference in the manufacturing period of the finished product and the quality is not uniform due to the difference in the device setting capability of skilled and unskilled workers. Had.

Based on the above, the problems of the prior art that are currently occurring and have ambiguity are those implemented only with a fixed angle because the clamp or vise is processed at a fixed angle, and the angle developed while having two axes cross-rotating on a plane. Due to the limitation of the range, there has been a problem in that the material bound to the jaw is jammed and is limited by the length difference between the materials even within the expandable range, so that the indicated range of use cannot be realized.

In addition, pipe notching of tubular materials involves the holding and outsourcing of laser processing and hydraulic/pneumatic notching equipment, and the pipe notcher is a work tool for a single purpose, and its utility is limited. In addition, after marking the processing part on the material, the finished product is low in gas cutting and polishing processing and requires a lot of time for processing.

Therefore, the technical task to be achieved by the present invention is that it is possible to accurately and intuitively check the angle that can be set to respond more flexibly to the field situation, to actively deploy, and to bind between release materials while being jammed due to the difference in length between materials. The purpose is to provide the convenience of the operator and the composition of the finished product in various forms and uniform quality acquisition and the convenience of the operator by eliminating the problem and expanding the range of use by enabling the notching work of the tubular material when necessary.

In order to solve the above-described problems, the adjustable angle vise of the present invention includes a gear 1 surface 100 and a gear 2 surface 110 formed to set an angle using a range in which rotation is developed by engaging and driving;

A protractor set 120 and an angle confirmation window 130 provided to accurately and intuitively check the displacement and setting of the angle on the upper part of the gear 1 surface 100 and the gear 2 surface 110;

A mounting surface 140 formed so that a step clamp 400 for binding materials and a binding device 440A/B can be fastened to the extension planes of the first gear surface 100 and the second gear surface 110, Two mounting surfaces 150;

The mounting 1 side 140 and the 2 mounting side 150 are individually attached so as to fasten various types of fastening devices and fastening between the release materials, step clamp 400 and fastening device feeder (440A). Wow;

A vertical fixture 500 provided on the side protrusions of the first mounting surface 140 and the second mounting surface 150 to secure a fixing reference when vertically deployed corresponding to a plane;

A mounting groove in which a device fastening part 330 formed to be fastened to a work table or equipment including the central axis of the gear 1 side 100 and the gear 2 side 110 and the ball B of the ball fixing method can be detached It provides an adjustable angle vise, characterized in that consisting of a gear fixing portion 300 is formed (320).

Here, a ball fixing inner part 520 is formed on one surface of the gear 1 surface 100 and the gear 2 surface 110 so that the ball (B) and the spring (S) of the ball fixing method move up and down. It is preferable that the ball (B) is selectively detached from the seating groove 320 provided in (300). And it is preferable that an adjustment bolt (W) for adjusting the elastic force of the spring (S) is provided at the upper end of the ball fixing inner part 520.

In addition, a friction plate 220 and a gear 1 surface 100 for securing abrasion resistance due to friction generated in driving rotation are provided on the opposite surfaces of the gear 1 surface 100, the gear 2 surface 110 and the gear fixing part 300. ), fastening of the set angle of the device and the insertion of the fixing bushing 210 to correct the clearance generated during rotational deployment and fixing on the central axis where the gear 2 surface 110 and the gear fixing part 300 are connected It is preferable that the fixing handle 200 is provided.

The adjustable angle vise according to the present invention provides the following effects.

As described above, the adjustable angle vise of the present invention enables the use of the adjustable angle vise to be rotated and deployed on a plane, that is, various angles set for the purpose of use, such as assembly and welding work, etc. As well as enabling the binding function between the realization and the release material, there is an effect of enabling a more versatile work function by enabling a vertical expansion function and notching work of the tubular material corresponding to the plane.

In addition, the adjustable angle vise of the present invention includes a protractor set 120 and an angle confirmation window 130 to accurately and intuitively check the change and setting of the angle on the first gear surface 100 and the second gear surface 110. Since it is provided and does not require the use of an additional measuring tool, it has the effect of providing speed, accuracy and convenience of the angle setting work.

And the adjustable angle vise of the present invention includes a removable ball fixing inner part 520 and a seating groove 320 connecting the gear 1 side 100, the gear 2 side 110 and the gear fixing part 300 to be rotated. It has the effect of implementing the setting angle more conveniently by applying it so that it can be selectively fixed for each typical expansion angle.

In addition, the adjustable angle vise of the present invention eliminates jamming due to the difference in length between materials at the same angle by individually disposing step clamps 400 capable of linear movement on the mounting surface 140 and the mounting surface 2 150. And there is an effect of realizing various tasks by having a structural characteristic capable of selectively fastening various types of interlocking devices or pipe notchers that can secure the center of a polygon or the like.

In addition, the adjustable angle vise of the present invention has the effect of simplifying the structure so that operation is convenient and various angles that can be set are implemented to obtain various types of creative finished products.

1 is a combined perspective view showing the appearance of an adjustable angle vise according to the present invention.
2 is an exploded perspective view showing the assembled state of the protractor set 120 and the angle confirmation window 130 of the adjustable angle vise according to the present invention.
3 is an exploded perspective view showing the assembled state of the gear 1 side 100, the gear 2 side 110, the 1 mounting side 140, and the 2 mounting side 150 of the adjustable angle vise according to the present invention.
4 is an enlarged perspective view of the protractor set 120 and the angle confirmation window 130 of the adjustable angle vise according to the present invention.
5 is a perspective view showing a gear fixing part 300 of an adjustable angle vise according to the present invention.
6 is a perspective view showing the structure of the mounting surface 140, the mounting surface 2 150 and the step clamp 400 of the adjustable angle vise according to the present invention.
7 is an exemplary view showing the driving and rotation development of the adjustable angle vise according to the present invention.
8 is an exemplary view showing the vertical expansion function of the adjustable angle vise according to the present invention.
9 is an exploded perspective view showing the configuration and assembly state of the pipe notch of the adjustable angle vise according to the present invention.
10 is an exemplary view showing the pipe notching function of the adjustable angle vise according to the present invention.

Hereinafter, specific details for the implementation of the present invention will be described by describing embodiments of the present invention with reference to the accompanying drawings.

It will be described with reference to FIGS. 2 and 3 as follows.

The adjustable angle vise includes a gear 1 side (100) and gear 2 side (110), a pair of facing protractor sets (120) and an angle confirmation window (130), a mounting side (140) and a mounting side (150). ), step clamp 400 and fastening device (440A/B), gear fixing part 300 and vertical fixing plate 500, central shaft 310, fixing bushing 210 and friction plate 220, fixing It consists of a handle bolt 230, and a fixing handle 200 and a bolt, a nut, etc. which are connecting members.

Each of the gear 1 surface 100 and the gear 2 surface 110 are rotated by meshing and driving with respect to the two parallel central axes 310 of the gear fixing part 300, and the step clamp 400 at the fixed alignment position. ) Refers to the part formed in the shape of a cylindrical gear. In addition, the first mounting surface 140 and the second mounting surface 150, which are extended planes of the gear 1 surface 100 and the gear 2 surface 110, are formed based on the step clamp 400 so that the material can be disposed. And it consists of a structural feature that can be fastened a binding device (440A/B) capable of fixing it.

This is the range of angles in which the first mounting surface 140 and the second mounting surface 150 are rotated from the two central axes 310 when the gear 1 surface 100 and the gear 2 surface 110 are rotated. It is a concept of setting the angle by using and using the step clamp 400 and the binding device (440A/B) individually attached to the mounting surface 140 and the mounting surface 150 to bind the material.

When described with reference to FIGS. 4 and 6 are as follows.

The gear 1 surface 100 and the gear 2 surface 110 have a shape of a cylindrical gear in which a pitch circle is circumscribed with respect to two parallel central axes 310 of the gear fixing part 300 and meshed with each other. The angle of the state in which the opposite sides of the mounting 1 side 140 and the mounting 2 side 150, which are the extended planes for each other, are parallel to each other and the two step clamps 400 aligned in a fixed position form a straight line. It is determined on the basis of "zero degrees".

In addition, the upper part of the gear 1 surface 100 and the gear 2 surface 110 is directed to a pitch circle circumscribed from each central axis 310 and corresponds to the rotation of the pitch circle, and the indicator line and number are subdivided into equal angles. A pair of protractor sets 120 are provided to enable intuitive confirmation of the angle to be set and to actively cope with changes. For reference, the angle indicator line and the number of the protractor set 120 are based on "mechanical 0 degrees", except for the central axis 310 and the pitch circle of the first gear 100 and the second gear 110. When the contact is in a straight line, the angle formed by the corresponding protractor set 120 is set to 0 degrees, and the actual notation is set to 180 degrees. The reason for this is that when the material is "mechanical 0 degree", the angle at which the material is bonded in a straight line between the step clamp 400 and the binding device 440A/B is 180 degrees.

Therefore, the indication of the angle indicator line and the number is limited to 180 degrees clockwise from the circumscribed point of the pitch circle, and the position of -90 degrees from the circumferential point of the pitch circle. After marking "actual 0 degree" in the left and right symmetrically, the indicator line and the number are equally divided and indicated, but the interval between the angle leader line is 5 degrees and the number of the angle value is arranged in units of 15 degrees of the angle indicator line. Note that the unit of the angle indicator line is 5 degrees, but in order to cause displacement to the corresponding angle, the gear 1 side 100 and the gear 2 side 110 correspond from the outer circumference of the pitch circle and each central axis 310. It can be seen from the structural characteristics that utilize the angle of the range that is developed by engaging and driving when the displacement occurs by 2.5 degrees.

It will be described with reference to FIGS. 2 and 4 as follows.

And it is provided with an angle confirmation window 130 that can confirm the change and setting of the angle according to the rotation of the gear 1 side 100 and the gear 2 side 110, but the gear 1 side 100 and the gear 2 side 110 It is located in the upper part of the assigned protractor set 120 and the lower part of the fixed bushing 210 that constrains the clearance between the central axis 310, and two parallel central axes 310 and a pitch circle are provided on a straight line circumscribed. By securing a space in the confirmation window based on the position where the angle indicator line of the corresponding protractor set 120 forms a straight line, fixed points are formed in both directions so that the angle indicator line and the angle value are aligned and visible at the same time to increase readability.

In addition, the dimension marking of the above-described division angle is for better understanding, and is illustrated by applying a representative setting angle frequently used when manufacturing an actual finished product, and it is stated that the dimension can be rearranged by different application of the gear module and the number of teeth of the gear.

It will be described with reference to FIGS. 3 and 6 as follows.

The mounting surface 140 and the mounting surface 2 150 refer to the portion of the extended plane excluding the gear 1 surface 100 and the gear 2 surface 110 based on the step clamp 400 at a fixed alignment position. It can be seen that the step clamp 400 for binding the material, the binding device 440A/B, and a vertical fixing table 500 performing a vertical deployment function are provided.

In addition, a linear slide groove 530 penetrating the central portion is formed on the top of each of the mounting surface 140 and the mounting surface 150 so that the step clamp 400 and the binding device feeder 440A for binding the material. ) To allow linear movement, and a slide rail 540 in the lower part to compensate for the gap when the step clamp 400 and the binding device gripper (440A) move and prevent the fixed material from floating. Make it possible.

In detail, the tightening bolts 420 are moved from the aligned position on the horizontal plane on which the step clamp 400 of each of the mounting surface 140 and the mounting surface 2 150 is located so that it can be fixed and released in a selective position. It is equipped with. The reason for this is to secure a space at the binding position at the same angle when binding between materials after the set constraint is completed at the specified angle and to eliminate jamming due to the difference in length between materials. And the step clamp 400 and the binding device feeder (440A) on the vertical surface by forming a locking device fastening part 470 to secure the central point of the material having a circular or polygonal cross section and notching of the tubular material It is possible to selectively fasten a pipe notch that performs the operation.

It will be described with reference to FIGS. 3 and 8 as follows.

Next, the vertical fixture 500 will be described, provided at the bottom of the protrusion that is the same side of each of the mounting surface 140 and the mounting surface 150, and the adjustable angle vise is rotated even in a vertical state corresponding to the plane. It plays a role in securing the standard of becoming.

This will be described for example the two mounting surfaces 150, the vertical fixing plate 500 is a gear fixing part 300 in the outline of the right protrusion of the two mounting surfaces 150 when the adjustable angle vise is mechanically 0 degrees. If you connect a virtual extension line heading to the circumference (arc) of the outline of, a tangent line is formed. These tangents form a continuous tangent line along the circumference (arc) of the outline of the gear fixing part 300 with the rotation of the two mounting surfaces 150, so that the two mounting surfaces 150 secure a fixed position perpendicular to the plane. Then, the connected mounting surface 140 and the gear fixing part 300 can be rotated. As shown in FIG. 8, the table is made of steel and the vertical fixing table 500 is assumed to be a strong magnet, and when the adjustable angle vise is vertically positioned on the table, the protrusion of the two mounting surface 150 and the gear fixing part 300 are formed. It is possible to secure a fixed standard in which the tangent line is in horizontal contact with the table, and the first mounting surface 140 and the gear fixing unit 300 can be rotated and deployed based on the mounting two surfaces 150 fixed to the table. Those of ordinary skill in the art will be able to easily understand.

It will be described with reference to FIGS. 2 and 5 as follows.

The gear fixing part 300 is located at the lower end of the gear 1 surface 100 and the gear 2 surface 110 which are driven to be meshed, and the gear 1 surface 100 and the gear 2 surface 110 are arranged on two parallel central shafts 310. A through hole is formed so that) can be fastened using the fixing handle bolt 230 and the fixing handle 200 to serve as a reference for the rotation axis of the first gear surface 100 and the second gear surface 110.

And when the "mechanical 0 degree", the corresponding rotation of the gear 1 side 100 and the gear 2 side 110 driven from 180 degrees indicated by the pair of protractor sets 120 facing each other develops to 180 degrees By forming the seating groove 320 divided and arranged at a certain angle in the semicircular trajectory to be formed so that the ball (B) of the ball fixing method performing a selective stopping function at a representative angle can be detached.

For reference, referring to FIG. 7, the ball (B) of the ball fixing inner part 520 of the gear 1 surface 100 and the gear 2 surface 110 and the seating groove 320 of the gear fixing part 300 are connected to each other. It can be confirmed that it is functional.

In detail, the diameter of the seating groove 320 provided in the gear fixing part 300 is processed to a size of about 70% of the ball fixing inner part 520 formed on the gear 1 side 100 and the gear 2 side 110 to be detached. The ball (B) that is to be put in and out to be able to function smoothly. For example, the ball fixing inner portion 520 formed on the first gear surface 100 and the gear 2 surface 110 has an actual inner diameter of 3.3 mm when the pitch of the screw is M4*0.7P, and the diameter of the ball (B) is Assume 3.0mm. At this time, the ratio of the ball (B) introduced into the seating groove 320 of the gear fixing part 300 is 3:1, so that the wear resistance of the gear fixing part 300 is increased and stable fixing function can be performed during removal. do.

When assembling the gear 1 surface 100 and the gear 2 surface 110 of the above-described structure into the gear fixing part 300, a gear using the fixing bushing 210, which is a type of oil-free bearing excellent in lubricity and wear resistance, is used. It is connected from the central axis of the first side 100 and the second side of the gear 110 to each central axis 310 formed on the gear fixing part 300. At this time, by vertically press-fitting so that the eccentricity is not prevented, the restraint of the central shaft 310 is secured to have a function of correcting the clearance generated when driving rotation of the first gear surface 100 and the second gear surface 110. In addition, by disposing a friction plate 220 corresponding to a dimension of 0.02 to 0.05 mm between the mating surfaces of the gear 1 surface 100, the gear 2 surface 110 and the gear fixing part 300, the friction of the mating surface is minimized and durability. To increase.

Next, the clamp lever nut, which is the fixing handle 200, is a device for quickly coupling the gear 1 surface 100, the gear 2 surface 110 and the gear fixing part 300, and the lower surface of the gear fixing part 300 It is fastened by using a fixed handle bolt 230 that penetrates to the top surface of each of the gear 1 side 100 and the gear 2 side 110, and the extended plane of the gear 1 side 100 and the gear 2 side 110 It avoids interference with the step clamp 400 provided in and has a function of selectively fastening in various directions.

It will be described with reference to FIGS. 9 and 10 as follows.

The adjustable hanger vise of the present invention has a structural feature that allows direct cutting work in addition to the function as a fixing device for the material as it is possible to mount a pipe notcher capable of performing a notching work on a tubular material.

Here, a pipe notch that can be mounted on an adjustable angle vise is described, a case unit 600, a linear bushing 610, a linear shaft 620, a spindle shaft 630, a ball bearing 640A, a snap ring 640C, and a spindle It consists of a configuration such as a lock guide rail 680 and a guide 660.

In detail, on the outside of the case unit 600 of the pipe notch, the step clamp 400 attached to the mounting 1 surface 140 and the mounting 2 surface 150 and the engaging device fastening part 470 of the binding device feeder 440A ) Is formed, and a linear bushing 610 capable of linear and rotational movement is provided therein. Here, the linear bushing 610 serves to guide the linear shaft 620 to reach the material to be processed. And a spindle lock guide rail 680 is formed on the outside of the linear shaft 620 in the longitudinal direction to face the spindle lock guide 660 that suppresses the rotational motion, and only linear motion is possible, and the actual rotation is the linear shaft. Spindle shaft with spindle threaded parts 640C so that cutting equipment such as HOLE SAW, ENDMILLS, and DRILL CHUCK can be fastened based on bearings 640A installed on both sides of 620 (630) is in charge. This is because it is an essential element for safety to prevent jamming or curling disaster that may occur from rotation of the linear shaft 620 protruding to the outside to reach the processed material.

In this way, the adjustable angle vise of the present invention provides convenience of operation due to quick and accurate angle setting and structural characteristics, and it is possible to bind between release materials, notching of tubular materials, and to expand in a vertical direction. In addition to the original function and purpose of use of the vise, it can be used more widely.

As described above, the present invention is not limited to the specific preferred embodiments described above, and obvious modifications are implemented by those of ordinary skill in the art without departing from the spirit of the present invention claimed in the claims. It is possible and such modifications are within the scope of the present invention.

100: gear 1 side 110: gear 2 side 120: protractor set 130: angle confirmation window 140: mounting side 1 150: mounting side 2
200: fixed handle 210: fixed bushing 220: friction plate 230: fixed handle bolt
300: gear fixing part 310: central axis 320: mounting groove 330: device fastening part
400: step clamp 410: step clamp fixing washer 420: step clamp fixing bolt
430: step clamp fixing nut
440A: binding device feeder 440B: binding device fixture 450: slide rail fixing washer
460: fastening device feeder fixing bolt 470: locking device fastening part
500: vertical fixture 520: ball fixed inner portion
530: slide groove 540: slide rail
600: case unit 640: linear bushing 620: linear shaft
630: spindle shaft 640A: bearing 640B: snap ring 640C: spindle thread
650: clamping part 660: spindle lock guide 670: fixing rivet
680: spindle lock guide rail
700: circular material string
W: Tension adjustment bolt S: Spring B: Ball

Claims (12)

A gear 1 surface 100 and a gear 2 surface 110 formed to set the angle by using the expansion range of the angle formed with the central axis by driving the cylindrical gears oppositely based on the central axis parallel to each other;

A protractor set 120 formed by subdividing a scale and a number at an equal angle from each central axis toward the pitch circle of the cylindrical gear on one surface of the first gear surface 100 and the gear surface 110;

A mounting surface 140 provided with a step clamp 400 and a binding device 440A/B for arranging and binding a material on one extended surface of the gear 1 surface 100 and the gear 2 surface 110, mounting Two sides 150;

A vertical fixing table 500 provided with a strong magnet or a fixing block to secure and fix vertically on a plane at one side of each of the protrusions of the first mounting surface 140 and the second mounting surface 150;

A device so that the seating groove 320 of the ball (B) including the central axis of the first gear surface 100 and the gear 2 surface 110 and inducing the selective detachment function of the set angle is arranged and can be fastened to the workbench A gear fixing part 300 having a fastening part 330 formed thereon;

It characterized in that a fixing handle 200 is provided to have a selective locking and releasing function even in a narrow space when the gear 1 surface 100 and the gear 2 surface 110 are constrained to and released from the gear fixing part 300. Adjustable angle vise.
delete delete delete delete delete delete delete delete delete delete In the pipe notcher using the adjustable angle vise of claim 1,
A case unit 600 in which a linear bushing 610 that enables linear and rotational movement is installed;

The outer side of the case unit 600 is formed so that it is possible to mount the step clamp 400 and the binding device feeder 440A attached to the mounting surface 140 and the mounting surface 2 150 of the adjustable angle vise. A bite jaw fixing part 650;

A linear shaft 620 that is a linear motion shaft that is guided from the linear bushing 610 of the case unit 600 and reaches to a workpiece;

The outer side of the linear shaft 620 is formed with a spindle lock guide rail 680 in the longitudinal direction that suppresses the rotational movement so as to prevent industrial accidents such as curling or pinching of the body part. A spindle lock guide 660 having a function;

Inside the linear shaft 620, the bearings 640A installed at both ends are in charge of the actual rotational movement as a base axis, and the spindle shaft 630 is formed with a spindle screw part 640C so that the cutting equipment can be fastened. Pipe notcher, characterized in that.

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