KR100982361B1 - Edge milling tool - Google Patents

Abstract

PURPOSE: A chamfering machine is provided to minimize vibrations during a machining process and to improve processing quality by being fixed on the surface of a workpiece. CONSTITUTION: A chamfering machine comprises two rotary cutters(30,30'), a main rotary shaft, an inner rotary shaft, and an outer rotary shaft(60). The two rotary cutters are symmetrically faced to each other. The main rotary shaft and the inner rotary shaft are fixed inside the main body of the chamfering machine. One between two rotary cutters is directly coupled with the main rotary shaft and the inner rotary shaft so that one rotary cutter is fixed to the end(A) of the chamfering machine. The outer rotary shaft is inserted into the main rotary shaft and the inner rotary shaft. The other rotary cutter is inserted into an outer cap(110).

Description

Chamfering Machine {Edge Milling Tool}

The present invention relates to a chamfering machine that performs a surface treatment such as chamfering treatment for the edge of the cutting surface in processing a workpiece used in various machine tools or ships.

Chamfering machine is a tool that performs the surface treatment such as chamfering treatment on the edge of the cutting surface when processing the workpiece used in various machine tools or ships.

In general, when rounding or chamfering the corners of a workpiece, the grind is chamfered by snow, so the angle of chamfering is not constant, and precise and uniform chamfering was not possible, and the work time was long and efficient. There was no closure.

This closure was resolved by 'Cavitation Machine' (hereinafter referred to as 'Preliminary Proposition 1'), Utility Model Registration Application No. 20-1998-0028831, but the preceding proposal 1 was to be able to chamfer only one corner. When chamfering the lower edge of the workpiece to be chamfered in order to perform the work was cumbersome and time-consuming disadvantages.

This shortcoming was solved by another utility model registration application No. 20-1999-0015627 'chamfering' (hereinafter referred to as 'priority draft 2') (Fig. 11). Preliminary proposal 2 symmetrically opposes two rotary cutters that form a sawtooth circular cut-off as the size of the rounding to be chamfered or the inclination angle of the chamfer on the rotational axis of the drive shaft driven as air to face the upper and lower edges of the workpiece. At the same time, it is possible to chamfer efficiently, and according to the preceding proposal 2, the upper and lower edges of the workpiece can be rounded or chamfered at the same time, which makes the chamfering work very efficient and convenient, especially the rounding size of the upper and lower parts and the inclination angle of the chamfer There is an effect that the degree can be formed uniformly.

However, according to Prior Art 2, the following problem occurs (see FIG. 11).

First, according to the preceding proposal 2, the guide flange 6 takes the form of a large circle. The reason for taking the form of 'circle' is that the rotary cutters 11 and 11 'accurately approach the workpiece 13 during processing. The reason for taking the shape of a 'large' circle is that the circular guide flange 6 can prevent the shaking of the tool during machining as the ground plane with the workpiece 13 becomes wider, resulting in high quality. Because.

By the way, this circular guide flange 6 is vulnerable to interference and can be applied only when the edge of the plate (Fig. 6a), the weld line or the wall in the corner or the part where the guide flange 6 is grounded If there is a protrusion such as the problem occurs that the application is not possible (Fig. 6b). If there is interference that interferes with the fixation of the guide flange 6 in the part where the machining takes place, it is impossible to work. In the case of the preceding proposal 2, the guide flange 6 is not correctly settled on the surface of the workpiece 13. If you do not get high quality processing. That is, in the case of the preceding proposal 2, the minimum space as large as the size of the guide flange 6 should be provided to enable the work.

Second, it is difficult to cope with the change in thickness of the workpiece 13. That is, the preceding proposal 2 takes a method in which the rotary cutters 11 and 11 'are symmetrically connected to both sides and connected with the rotation shaft 2 by the high information bolt 12, so that it is difficult to efficiently cope with the change in the thickness of the workpiece 13. will be. For example, in the case of the preceding proposal 2, if the thickness of the workpiece 13 is changed, the rotary cutters 11 and 11 'should be replaced in pairs and the high information bolt 12 should be changed.

Third, when the thickness of the workpiece 13 is thick, the length of the high information bolt 12 is increased, and power transmission to the rotary cutters 11 and 11 'is not performed properly, as well as the torsion of the rotary cutters 11 and 11'. Due to this phenomenon, the high information bolt 12 is sheared. That is, in case of the preceding proposal 2, since the rotary cutters 11 and 11 'are fastened between the rotating shaft 2 and the high information bolt 12, the high information bolt 12 loads the load applied to the rotary cutters 11 and 11'. Since it receives intensively at the point (G of FIG. 12) meeting the rotating shaft (2), the high information bolt 12 is easily sheared and slip occurs to make power transmission difficult.

Fourth, the worker must work while pressing the guide flange (6) artificially and strongly to the workpiece (13). This is because if the guide flange 6 is slightly dropped from the workpiece 13 and one side is lifted or tilted, the processing quality is poor. And since the rotary cutter (11, 11 ') does not fit well with the workpiece (13) surface because the load is concentrated only on one axis (high information bolt), the safety accident may occur.

The present invention has been proposed to solve the above problems, easy access to the workpiece with interference such as corners or walls of the corner, can easily cope with changes in the thickness of the workpiece, The purpose is to provide a chamfer that can prevent damage to equipment by spreading and absorbing loads, and to sufficiently fix the work surface to minimize the vibration during processing, thereby improving the processing quality of the work. It is done.

Other objects and advantages of the present invention will be described below, which are not limited to the matters set forth in the claims and the disclosure of the embodiments thereof, but also to the broader ranges by means and combinations within the range readily recited therefrom. Add that it will be included.

In order to achieve the above object, the present invention, in the chamfering machine that forms a screw thread on the end of the chamfering main body on which the rotating shaft rotated by the driving force of the motor and screwed the guide, two rotary cutters facing each other symmetrically One of them is directly coupled to the main rotary shaft and the inner rotary shaft fixedly installed inside the chamfering body so that the position is fixed at the end of the chamfering body, and the other one of the external rotary shaft inserted into the main rotary shaft and the inner rotary shaft By inserting and coupled to the outer cap at the end, it presents a chamfer characterized in that it is possible to adjust the mutual opposing distance of the two rotary cutters by adjusting the insertion length of the external rotary shaft.

According to the chamfering machine according to the present invention, it is easy to access to the workpiece with interference such as corners or walls of the corner, and can easily cope with the change in the thickness of the workpiece, and by distributing and absorbing the load generated during the machining operation In order to prevent damage to the workpiece, it is possible to improve the processing quality of the workpiece by sufficiently fixing the workpiece surface to minimize vibration during the machining operation.

Other effects of the present invention, as well as those described in the above-described embodiments and claims of the present invention, as well as potential effects that may occur within the range that can be easily estimated therefrom and potential advantages that contribute to industrial development It will be added that it will be covered by a wider scope.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

Figure 1 shows the overall appearance of the chamfering machine according to the invention, Figure 5 shows the mutual coupling relationship of the components constituting the chamfering machine according to the present invention.

The main body 150 of the chamfering machine which concerns on this invention arrange | positions the rotating shaft which rotates by the drive force of a motor (not shown), and forms the screw thread in the edge part A. As shown in FIG.

In the present invention, the motor may be an air motor or an electric motor. The motor is mounted to the handle portion of the main body 150 of the chamfering machine, as shown in Figure 1 when the handle is bent in the shape of a translator is usually referred to as an 'angle chamfer', and the case is straight stretched without bending is usually referred to as a 'straight type chamfering machine' do. However, the present invention is not particularly limited to the shape of the chamfering bar, the present invention can be applied to both the angle chamfering and straight chamfering.

The driving force of the motor is transmitted to the rotating shaft via the bevel gear 20 (Figs. 5, 13 and 14).

In the present invention, the rotary shaft is fixed to the inside of the chamfering body 150, the main rotary shaft 40 (Figs. 5, 13 and 14) and the internal rotary shaft 50 (Figs. 5, 13 and 14), It consists of three of the external rotary shaft 60 (Figs. 1, 5, 13 and 14) inserted into the main rotary shaft 40 and the internal rotary shaft 50.

The main rotary shaft 40 and the inner rotary shaft 50 rotates with the rotation of the bevel gear 20. At this time, the outer rotary shaft 60 is inserted into the main rotary shaft 40 and the inner rotary shaft 50 so as to be coupled. According to the rotation of the main rotary shaft 40 and the internal rotary shaft 50, the external rotary shaft 60 is also rotated together. Therefore, in the present invention, the rotation speed of the main rotation shaft 40 and the internal rotation shaft 50 and the rotation speed of the external rotation shaft 60 are the same.
Hereinafter, the coupling relationship between the main rotary shaft 40 and the internal rotary shaft 50 and the external rotary shaft 60 will be described in more detail.
Inside the internal rotation shaft 50 is a polygonal groove is processed to a certain depth as shown in FIG. In addition, the inside of the main rotating shaft 40 is processed so that the polygonal groove of the same size and shape as the polygonal groove processed in the inner rotating shaft 50 (Fig. 5). The main rotary shaft 40 and the internal rotary shaft 50 is a portion of the thread processing the main rotary shaft 40 and the internal rotary shaft 50 is fastened to each other, and between the main rotary shaft 40 and the internal rotary shaft 50 The rotary cutter 30 was positioned and fixed (FIG. 5).
On the other hand, the outer shape (cross-sectional shape) of the external rotary shaft 60 was processed to have the same size and shape as the polygonal grooves machined inside the main rotary shaft 40 and the internal rotary shaft 50 as shown in FIG. Therefore, the external rotary shaft 60 may be inserted to the main rotary shaft 40 through the internal rotary shaft 50 along the polygonal groove formed in the main rotary shaft 40 and the internal rotary shaft 50 (FIG. 5).
At this time, since the outer shape (cross-sectional shape) of the external rotary shaft 60 is not only a polygonal shape but a circular shape, it is the same shape as the polygonal groove formed in the main rotary shaft 40 and the internal rotary shaft 50, so that the main rotary shaft ( When the 40 and the inner rotary shaft 50 rotates, the outer rotary shaft 60 rotates at the same rotational speed as the main rotary shaft 40 and the inner rotary shaft 50 without slipping. That is, the driving force (rotation) generated from the motor passes through the main rotary shaft 40 and the internal rotary shaft 50 in the order of the external rotary shaft 60 without disruption. On the other hand, the insertion length of the external rotary shaft 60 (that is, the amount of the external rotary shaft 60 is exposed outside the internal rotary shaft 50) can be adjusted and fixed with a set screw (Fig. 1, Fig. 14).

Since a thread is formed at the end A of the chamfering main body 150, and a thread is formed in the coupling groove (FIG. 7) above the guide 140, the end A and the guide of the chamfering main body 150 are guided. Threads formed in the coupling groove (FIG. 7) of the 140 is to act in the form of male and female screws with each other.

Therefore, the guide 140 can be easily fastened to the chamfering body 150 by inserting the coupling groove (FIG. 7) of the guide 140 into the end A of the chamfering body 150 and turning clockwise ( Screw connection). Of course, when the guide 140 is turned counterclockwise, the guide 140 is separated from the chamfering body 150.

The chamfering machine according to the present invention uses two rotary cutters 30 and 30 'mounted to face each other symmetrically so as to efficiently chamfer the upper and lower edges of the workpiece simultaneously. In this case, the rotary cutter ( 30, 30 ') has the following characteristics.

That is, one of the two rotary cutters 30 and 30 'which are opposed to each other symmetrically is directly coupled to the main rotary shaft 40 and the internal rotary shaft 50 so that the position of the chamfering main body 150 is It is fixed at the end (A), the other one 30 'is inserted into the outer cap 110 at the end (B) of the external rotation shaft 60 to engage (Fig. 1, 13 and 14).

At this time, the rotary cutter 30 located at the end A of the chamfering body 150 rotates with the rotation of the main rotary shaft 40 and the internal rotary shaft 50, and the end B of the external rotary shaft 60. The rotary cutter 30 'located in the is rotated with the rotation of the external rotary shaft 60.

The reason for arranging the rotary cutters 30 and 30 'in this manner is to adjust the mutually opposed distance L between the two rotary cutters 30 and 30' by adjusting the insertion length of the external rotary shaft 60. To do this.

1, 13 and 14, when the operator pushes or pulls the external rotary shaft 60 (may be completely pulled out of the external rotary shaft 60), the external rotary shaft 60 is the main rotary shaft 40 and the internal rotary shaft ( The position moves in the state inserted in 50), and as a result, the insertion length is changed.

That is, when the operator pushes the external rotary shaft 60 into the chamfering body 150, the insertion length of the external rotary shaft 60 increases, and on the contrary, when the external rotary shaft 60 is pulled out of the chamfering main body 150, the external rotary shaft 60. The insertion length of is to be reduced. At this time, the position of the external rotary shaft 60 is fixed with a set screw (when using the chamfering machine according to the present invention, the external rotary shaft 60 should be fixed so as not to move) (FIGS. 1 and 14).

At this time, when the insertion length of the external rotary shaft 60 increases, the mutually opposed distances L of the two rotary cutters 30 and 30 'are reduced (a in FIG. 13 and a in FIG. 14), and the external rotary shaft 60. When the length of insertion) decreases, the mutually opposed distances L of the two rotary cutters 30 and 30 'increase (see FIG. 13B and FIG. 14B). Figure 2 shows a series of aspects of controlling the mutually opposed distance of the two rotary cutters (30, 30 ') in the chamfering machine according to the present invention.

According to the present invention, since the mutually opposed distances L of the rotary cutters 30 and 30 'can be freely adjusted, the operator can easily cope with the change in the thickness of the workpiece. That is, if the thickness of the workpiece is thin, the mutually opposed distance L of the rotary cutters 30 and 30 'may be reduced to match the thickness of the workpiece, and if the thickness of the workpiece is thick, the rotary cutters 30 and 30' may be adapted to the thickness of the workpiece. It is necessary to increase the mutually opposed distance L.

On the other hand, in the present invention, in order to enable the operator to finely adjust the mutually opposed distance (L) of the rotary cutter (30, 30 '), it is preferable to mark the scale on the surface of the external rotary shaft (60).

In addition, the external rotation shaft 60 is preferably such that its cross section takes the form of a polygon (Figs. 13 and 14).

The external rotary shaft 60 is rotated by receiving the rotational force of the main rotary shaft 40 and the internal rotary shaft 50 in the state inserted into the main rotary shaft 40 and the internal rotary shaft 50, the cross section of the external rotary shaft 60 This is because, in the case of taking the shape of a polygon, power transmission can be made smoothly without slipping, which is advantageous.

The guide 140 serves to fix the chamfer according to the present invention to the workpiece during the machining operation to prevent shaking and to allow the rotary cutters 30 and 30 'to accurately approach the workpiece.

Therefore, whether or not the guide 140 is properly fixed to the workpiece may be an important factor in determining the processing quality of the workpiece.

Thus, the present invention has been made in various technical attempts to ensure that the guide 140 is properly fixed to the workpiece.

First, the bevel is machined at the edge of the guide 140 and at the edge of the outer cap 110 (FIGS. 7, 9) to obtain a high quality processing quality even when there is a short distance protrusion such as a welding line as well as interference by a wall or the like. To make it possible.

That is, in FIG. 8D, there is a short distance protrusion by a welding line at a corner, and in this case, if the bevel is machined at the edge of the guide 140, it is possible to work much closer to the corner of the corner than otherwise. This leads to an improvement in processing quality.

This may induce an accompanying effect by processing the bevel also at the edge of the outer cap 110, the reason will be clearer with reference to FIG.

In Fig. 9E, there is a short distance protrusion by the welding line at the corner. In this case, if the bevel is machined at the edge of the outer cap 110, it is possible to work much closer to the corner of the corner than otherwise. This also leads to an improvement in processing quality. If the bevel is not processed at the edge of the outer cap 110, the upper portion of the hole will not be able to approach the rotary cutter (30, 30 ') will be difficult to process.

As described above, in the present invention, by processing the bevel at the edge of the guide 140 and the edge of the outer cap 110 at the same time, as shown in Fig. 8 even in the corners of the corners, even when there is a near projection by the welding line in the corner of the corner Since it becomes possible to work in close proximity, a high improvement of the machining quality can be expected.

Second, the guide 140 has a narrow upper portion (H) and a wider lower portion (I) and a width change section between the upper portion (H) and the lower portion (I) to facilitate access to the workpiece. It was terminated (FIG. 3).
The reason why the upper portion H of the guide 140 is narrowed is because it can facilitate access to the work where there is interference, such as a corner or a wall of the workpiece. The reason why the lower portion I of the guide 140 is widened is to prevent the occurrence of vibration during the machining operation by allowing the chamfering machine according to the present invention to be sufficiently fixed to the workpiece.

This can lead to a noticeable difference in effect rise compared to the prior art. 10 is a comparison of the shape (F) of the guide according to the prior art (prior design 2) and the shape of the guide 140 according to the present invention. According to F, the width of the guide is too large and the corners or walls of the corners, etc. Access to areas with interferences will be difficult and the processing quality will be significantly worse. On the other hand, since the guide 140 according to the present invention has a narrow width of the upper portion H, a fine enough approach is possible even where there is interference such as a corner or a wall.

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Third, the magnet 80 is inserted into the body 70 of the guide 140 (FIG. 5).

This is for the guide 140 to be fixed to the workpiece by the force of the magnet 80 so that the fixing of the guide 140 can be made sufficiently, whereby the width of the lower portion (I) of the guide 140 seems to be rather narrow. Nevertheless, it is possible to stably settle the workpiece.

In addition, since it is not necessary to widen the width of the lower portion I of the guide 140 by inserting the magnet 80, there is an advantage that the access to the place where the interference, such as the corner of the corner or the wall is more easily generated.

Fourth, a thin plate 100 made of special steel such as stainless steel or high speed steel was attached to the fixing surface C of the guide 140 (FIGS. 5 and 13).

This is to induce a smooth sliding between the guide 140 and the workpiece to improve workability and to prevent damage and deformation of the guide 140. Therefore, it is advantageous that the surface friction coefficient is small as a material of special steel, and accordingly, in the present invention, special steel such as stainless steel and high speed steel having such properties is applied.

Meanwhile, in the present invention, it is preferable to attach the bearing 10 to the end of the rotary cutter 30 fixedly coupled to the end A of the chamfering body 150 (FIGS. 1, 5, 13, and 14). ).

As a result, the bearing 10 is positioned between the two rotary cutters 30 and 30 'which are opposed to each other, and when the bearing 10 is attached between the rotary cutters 30 and 30', the amount of cutting on both sides is equal. It is easy to adjust, and it is possible to prevent the malfunction of the rotary cutters 30 and 30 'to dig into the workpiece, and also to ensure that the machining surface of the workpiece and the blades of the rotary cutters 30 and 30' are correct. It is possible to obtain high quality processing quality by making processing with attitude (angle).

In the chamfering machine (FIG. 11) according to the prior art (preliminary draft 2), the load is supported only at the end portion (G of FIG. 12) of the high information bolt 12. Therefore, the high information bolt 12 does not endure a lot of load on the rotary cutters 11 and 11 'and shear occurs or the thread is broken and slip occurs. In particular, the action point and the fixed point away from the torsion is severe, and the rotary cutter (11, 11 ') blade with the damage of the high information bolt 12 is broken.

In addition, when the two rotary cutters 11 and 11 'are overlapped as in the conventional chamfering machine (FIG. 11), it is almost impossible to equally chamfer the upper and lower surfaces. This is an unsuitable type for double-sided chamfering (linear processing) (FIG. 15), but it can be said that the application itself is unreasonable for double-sided curved processing (FIG. 15) of various thicknesses.

In contrast, the present invention proposes a method of specially manufacturing the outer shaft (external rotation shaft 60) by inserting the inner shaft (main rotation shaft 40 and the internal rotation shaft 50) and connecting them (Figs. 13 and 14). According to this, unlike in the prior art (preliminary draft 2), the load is not concentrated only at the portion where the bolt and the shaft are connected, and the load is evenly distributed throughout the shaft, and the power transmission is also accurate.

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The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 shows the overall appearance of a chamfering machine according to the present invention.

Figure 2 shows how to adjust the mutually opposed distance of the two rotary cutter in the chamfering machine according to the present invention.

Figure 3 shows a view from the front of the chamfering machine according to the present invention.

Figure 4 shows the appearance of the chamfering machine according to the present invention from the back side.

5 is an exploded perspective view showing the mutual coupling relationship of the components constituting the chamfering machine according to the present invention.

Figure 6 shows the problem of the conventional chamfering machine according to the prior design 2.

Figure 7 shows the bevel is processed in the corner of the guide in the chamfering machine according to the present invention.

Figure 8 shows the bevel is processed in the bevel is applied to the work site in the chamfering machine according to the present invention.

Figure 9 shows the appearance of the bevel is applied to the work site the outer cap beveled at the edge in the chamfering machine according to the present invention.

Figure 10 shows the usefulness of the shape of the guide in the chamfering machine according to the present invention.

11 shows a conventional chamfering machine according to the preceding proposal 2.

Figure 12 shows the problem of the conventional chamfering machine according to the prior design 2.

Figure 13 shows the coupling structure (side) of the rotating shaft in the chamfering machine according to the present invention.

Figure 14 shows the coupling structure (plane) of the rotating shaft in the chamfering machine according to the present invention.

Figure 15 shows the comparison between the form of straight processing and curved processing.
Figure 16 shows the outer shape of the polygonal groove processed in the inner rotary shaft in the chamfering machine according to the present invention and the outer rotary shaft processed in the same size and shape.

<Description of Major Symbols in Drawing>

10: bearing 90: cover plate

20: Bevel Gear 100: Sheet

30, 30 ': rotary cutter 110: outer cap

40: main rotation shaft 120: ring

50: internal rotation shaft 130: bolt

60: external rotation shaft 140: guide

70: guide body 150: chamfering body

80: magnet

Claims (10)

delete delete delete delete A chamfer in which a screw thread is formed at an end A of the chamfer main body 150 on which a rotating shaft rotated by a driving force of a motor is screwed, and a guide 140 is screwed thereto. One of the two rotary cutters 30, 30 ′ facing each other symmetrically is coupled directly to the main rotary shaft 40 and the internal rotary shaft 50, which are fixedly installed inside the chamfering body 150. The position is fixed at the end (A) of the chamfering body 150, the other one 30 'end B of the external rotary shaft 60 is inserted into the main rotary shaft 40 and the internal rotary shaft 50 By inserting and coupled to the outer cap 110 to adjust the mutually opposed distance (L) of the two rotary cutters (30, 30 ') through the process of adjusting the insertion length of the outer rotary shaft (60), The inner rotation shaft 50 is processed inside the polygon groove to a certain depth, the main rotation shaft 40 also processed to penetrate the polygon groove of the same size and shape as the polygon groove processed in the inner rotation shaft 50, the main rotation shaft ( 40) and the inner rotary shaft 50 is a portion of the thread processing to the main rotary shaft 40 and the internal rotary shaft 50 is fastened to each other, the external shape of the external rotary shaft 60 to the main rotary shaft 40 and the internal rotary shaft (50) the inner rotary shaft 60 passes through the inner rotary shaft 50 along the polygonal groove formed on the main rotary shaft 40 and the inner rotary shaft 50 by processing to have the same size and shape as the polygonal groove processed therein. To be inserted up to 40, the insertion length of the external rotary shaft 60 in the chamfering machine to be adjusted and fixed with a set screw, Guide 140 has a narrow top (H) and a wide bottom (I) there is a chamfer, characterized in that the form having a width change section between the top (H) and the bottom (I). delete The method of claim 5, Clamping surface, characterized in that the fixing plate (C) of the guide 140 is attached to a thin plate 100 made of special steel, such as stainless steel or high speed steel. delete delete delete

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