JP2001239415A - Assembling device of cutter for metallic material test piece, cutter for plate tension test piece, and manufacturing method of plate tension test piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling device of a cutter for a metallic material test piece in which replacement of a cutter is easy, cutting edge is not damaged and accurately and easily arranged, and provide the cutter for the plate tension test piece and a manufacturing method of the plate tension test piece. SOLUTION: In an assembling device 7, during the assembling, a cutter 21 comprising a tool rest 9 and a cutter 10 mounted to the peripheral surface of the tool rest 9 is arranged on a bed 8. In this case, the tool rest 9 is not directly arranged on the bed 8, a surface plate 11 is installed between the bed 8 and the tool rest 9, and the surface plate 11 is provided with a piece 12 for arranging the cutting edge 10a of the cutter 10. The piece 12 has a groove 20 and arranges the tip S so that the tip S of the cutting edge 10a of the cutter 10 mounted to the periphery of the tool rest 9 does not directly contact. Thus, the cutter 10 is fixed tightly at two points, so that the cutter does not shift even by screw fastening. Therefore, mounting accuracy can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for assembling a cutter for a test piece of a metal material used for checking the quality of the metal material.
The present invention relates to a cutter for a flat tensile test piece made of a metal material and a method for producing a flat tensile test piece using the cutter.

[0002]

2. Description of the Related Art In particular, a tensile test of a metal material is a test for measuring elastic properties, plastic deformation resistance, rupture strength, formability, etc. with respect to a tensile force. Not only is it used in commerce as a design standard, but also as a representative quality characteristic in manufacturing control. It is necessary to select a test piece (hereinafter referred to as a test piece) used for testing such a metal material so that the base material characteristics can be correctly obtained. Further, since the shape of the test piece greatly affects the test result, the shape is determined according to the type and size of the material.

FIG. 9 is an explanatory view showing an example of a test piece used for a tensile test. The tensile test piece 1 is a flat plate-shaped tensile test piece, and has a grip portion 2 at both ends, a parallel portion 3 and a shoulder portion 4 at the center. The shoulder part 4 is located between the grip part 2 and the parallel part 3, and the vertical cross-sectional shape shows a curve. The term “flat plate shape” as used herein includes a shape having a cross section having a curvature like an eight-bridge as cut out from a pipe. Symbol T is a parallel part 3
, L is the distance between gauge points, P is the length of the parallel portion 3, R is the radius of curvature of the shoulder 4, and these are JIS.
, A predetermined dimension is determined. In the tensile test piece 1, it is known that the measured value of elongation (elongation at break) also varies greatly depending on the length of the gauge length.

As described above, high precision is required for the shape and dimensions of a tensile test piece or the like made of a metal material, and it is important to select a test piece cutter to be used for producing the test piece. The test piece cutter is a general term for a test piece manufactured from a metal material by cutting, and includes a shaping machine (saper), a milling machine, a lathe, and the like.

[0005] The test piece cutter is roughly composed of a cutting tool and a tool rest supporting the cutting tool, and performs a cutting process to produce a test piece. Therefore, the cutting edge of the blade is worn and must be replaced regularly or irregularly to maintain a normal cutting edge.

[0006] Generally, the replacement of the blade is performed on site using a test-piece cutter assembling apparatus so as not to hinder the production of the test piece. The assembling apparatus arranges a tool rest on a base and a tool attached to a peripheral surface of the tool rest during assembly. The base has a flat portion, and when the tool rest is installed on the base, the cutting edge of the tool is aligned using the flat portion at the time of replacement of the tool attached to the peripheral surface of the tool rest.

[0007] With such an on-site assembling apparatus, the worn edge is quickly replaced, and by using a specimen cutter having a normally aligned edge, a high accuracy such as the tensile test specimen described above can be obtained. Even the required test piece can be produced accurately. Further, from the viewpoint of production efficiency, it is demanded that a plurality of tensile test specimens be produced at one time.
For this purpose, it has been studied to simultaneously produce a plurality of tensile test pieces to improve the efficiency of the cutting operation.

FIG. 10 is a view showing an example in which a plurality of flat plate tensile test pieces are simultaneously produced by a milling cutter. In FIG. 10, a plurality (four as an example) of samples 5 (hereinafter, referred to as strip samples) 5 collected from a base material product are stacked, cut by a milling cutter 6, and cut into parallel portions 3 of a flat plate tensile test piece. Is prepared. Here, a cutting state on one side is shown. Reference numeral 2 denotes a grip portion, and reference numeral 4 denotes a shoulder portion.

[0009]

As described above, the preparation of a test piece made of a metal material is performed by cutting with a cutting tool, and wear of the cutting edge is inevitable. Therefore, it is necessary to change the blade regularly or irregularly.In order not to hinder the preparation of the test piece, the blade of the test piece cutter can be replaced on site, There is a need for an assembling apparatus that can be aligned with the above. If the cutting edges are not exactly aligned, for example, if one protrudes compared to the other four, the processing accuracy will of course be degraded. There is a problem that the life is remarkably deteriorated.

[0010] On the other hand, in the production of a tensile test piece, particularly a flat plate tensile test piece, a plurality of strip samples taken from a base material product is formed into a shape having a grip portion, a parallel portion, and a shoulder portion as shown in FIG. There is a strong demand to produce accurately and simultaneously.

However, the conventional technique has the following problems. The assembling apparatus arranges a tool post and a tool attached to a peripheral surface of the tool post on a base at the time of assembling, and the tool whose tip has been replaced uses a flat portion of the base to provide a sharp tip. And the blades are fixed by directly contacting the flat part and fixing the cutting edge.
Mounting accuracy decreases. Therefore, after the blade is fixed, electrolytic polishing or the like is performed for the purpose of aligning the position of the blade, but it is necessary to use a huge and expensive polishing device because the blade has to be mounted on the tool post. There are also problems.

If a cutter for a test piece having a displaced blade and reduced mounting accuracy is used, it is difficult to produce a plate-shaped tensile test piece having high shape and dimensional accuracy, and the life of the blade is reduced. For this reason, the operator needs a skill for fixing the blade, and also takes time.

On the other hand, the method of simultaneously producing a plurality of flat tensile test pieces by a milling cutter has the following problems. When a milling cutter is used, the rigidity is generally limited due to the length of the blade of a commercially available blade, and the thickness is limited to about 150 mm. This limits the thickness of the stack of strip samples. Therefore, it may not be possible to simultaneously produce a flat plate tensile test piece from a required number of strip samples.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when a test piece made of a metal material is produced using a test piece cutter, the cutting edge of the cutting tool is prevented from being worn. Assuming that it is not possible, the present invention provides a metal material test piece cutter assembling apparatus which can easily and precisely align the blade edge without changing the blade and without damaging the blade edge. In particular, it is an object of the present invention to provide a cutter for a flat plate tensile test piece which is particularly suitable for a flat plate tensile test piece that is frequently produced, and a method of manufacturing a flat plate tensile test piece by the cutter.

[0015]

According to the first aspect of the present invention,
An assembling apparatus for a metal material test piece cutter in which a tool post and a cutter comprising a tool attached to a peripheral surface of the tool post are arranged on a base during assembly. A metal plate for a test piece of a metal material, characterized in that a surface plate is installed on the surface plate, a frame for aligning the blade tips of the blade is provided on the surface plate, and a groove is formed in the frame so that the blade edge does not contact the frame. It is a cutter assembling device. The invention according to claim 2 is the invention according to the above invention, wherein the base and the surface plate are integrated.

According to the first aspect, at the time of assembling, a surface plate is installed between the base and the tool post, a frame for aligning the blade edge of the blade is provided on the surface plate, and a groove is provided in the frame to adjust the blade edge. Since the top is not contacted, the blade is not displaced by screwing or the like when the blade is fixed, and the mounting accuracy can be increased. The same effect can be obtained by claim 2.

According to a third aspect of the present invention, there is provided a cutter for a flat plate tensile test piece made of a metal material, comprising a blade used for producing a flat plate tensile test piece comprising a grip portion, a parallel portion, and a shoulder, and a tool rest for mounting the blade. A cutter for a flat plate tensile test piece made of a metal material, wherein a shape of a blade edge in a vertical cross section of the blade is the same as a shape of a shoulder in a vertical cross section of the flat plate tensile test piece.

According to the third aspect of the present invention, the shape of the cutting edge in the longitudinal section of the blade is the same as the shape of the shoulder in the longitudinal section of the flat tensile test piece. By moving the cutter relatively, parallel portions and shoulder portions of a plurality of strip samples can be simultaneously formed.

According to a fourth aspect of the present invention, there is provided a flat plate tensile test piece prepared by cutting a strip sample taken from a metal material with a cutter comprising a tool rest and a cutter attached to a peripheral surface of the tool rest. Exposing both sides of each strip sample,
In the horizontal direction, the shape of the cutting edge in the longitudinal section is the shape of the shoulder in the longitudinal section. By contacting a blade with the same edge shape as
The cutter is rotated so that the parallel portion and the shoulder portion of the strip sample are not deviated, and the cutter is relatively moved in the lateral direction of the strip sample, so that the parallel portion of the plurality of strip samples is removed. And a shoulder portion are simultaneously produced, and a method for producing a flat plate tensile test piece using a cutter for a flat plate tensile test piece made of a metal material.

According to the fourth aspect of the present invention, a parallel portion and a shoulder portion of a plurality of strip samples can be simultaneously produced by using the flat tensile test piece cutter according to the third aspect of the present invention.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the assembling apparatus according to the present invention. FIG. 2 is a diagram showing an example of a frame used in the present invention. The assembling apparatus 7 is used for assembling the base 8
A tool post 9 above, and a tool 10 attached to the peripheral surface of the tool post 9
Is disposed.

In this case, instead of directly disposing the tool rest 9 on the base 8, a platen 11 is installed between the base 8 and the tool rest 9, and the cutting edge 10 a of the cutter 10 is aligned with the platen 11. 1
2 and a groove 20 is provided in the top 12. The base 8 is
The base body 8a and the base stand 8b are integrally installed thereon. The base mount 8b maintains a height suitable for performing a blade tip replacement operation.

The surface plate 11 facilitates assembly such as replacement of the blade edge of the cutter 21. The surface plate 11 is provided with a concave portion 13 in the center of the lower surface, and is fitted to the convex portion 14 provided in the center of the upper surface of the base stand 8b to be fixed to the base 8. FIG. 1 shows an example in which the surface plate 11 and the base gantry 8b are separated from each other, but the surface plate 11 and the base gantry 8b may be integrated. A shaft 15 protrudes from the center of the upper surface of the surface plate 11, and a threaded portion 16 is provided at the tip.

At the time of assembling, the cutter 21 removed from the driving device used for cutting the test piece, that is, the tool rest 9 on which the cutter 10 is mounted on the peripheral surface is placed on the surface plate using the rotary shaft insertion hole 9a. 1
The tool post 9 and the bolt support plate are mounted by fitting the bolt support plate 17 on the shaft 15 of the first shaft 15, mounting a bolt holder 18 having an internal screw 19 cut therein, and tightening the internal screw 19 to the threaded portion 16. 17 is fixed between the bolt holder 18 and the surface plate 11.

A top 12 is fitted into the peripheral edge of the upper surface of the surface plate 11. The top 12 has a role of aligning the cutting edges 10a of the blade 10, and as shown in FIG.
Is provided with a groove 20 and is attached to the peripheral surface of the tool rest 9.
The tips S of the cutting edges 10a are aligned so as not to directly contact. The groove 20 supports the blade 10 at two points A and B when the blade 10a of the blade 10 is inserted.
Is prevented from directly contacting the top 12.

The shape and size of the groove 20 can be determined appropriately as long as the point S of the cutting edge 10a does not directly contact the top 12. By providing the groove 20 in the top 12, the blade 10 is firmly fixed at two points, so that the blade does not shift even when screwed. Therefore, the mounting accuracy can be improved.

FIG. 3 is a perspective view showing an embodiment of a plate tensile test piece cutter according to the present invention, and FIG. 4 is an explanatory view of a blade constituting the cutter of the present invention. Here, a cutter 21 for a flat plate tensile test piece (hereinafter referred to as a cutter) made of a metal material has five blades 10 attached to the peripheral surface of the tool rest 9 at regular intervals.

As shown in FIG. 4, the blade 10 has the same shape of the blade edge 10a as the longitudinal section and the shape of the shoulder in the longitudinal section of the plate tensile test piece. It has a suitable cutting edge. In practice, a plurality of blades 10 are mounted on the peripheral surface of the tool rest 9 at equal intervals. However, here, in order to make the function of the cutting edge 10a easy to understand, a description will be given using a single blade 10. On the left side, a flat plate tensile test piece 1 produced by the cutter 21 of the present invention is placed. The cutter 21 is horizontally moved to the right after fabrication. Accordingly, when the cutter 21 is horizontally moved to the left as it is and brought into contact with the parallel portion of the flat plate tensile test piece 1, the shape of the cutting edge 10 a due to the vertical cross section of the upper shoulder 4 and the blade 10 whose cross-sectional shape shows a curve. Matches.

In producing the flat plate tensile test piece 1,
On the plane of the strip sample, the cutting edge 10a of the blade 10 is brought into contact with the planned portion of the parallel portion and the shoulder portion produced by cutting so that the parallel portion of the strip sample and the planned portion of the shoulder portion are not deviated. Then, when the cutter 21 is rotated, the cutting edge 10a moves from the upper shoulder 4 to the lower shoulder 4 by drawing a trajectory PQ indicated by a dashed line, as shown by an arrow, and the strip sample is cut and parallelized. A flat plate tensile test piece 1 having a part 3 and a shoulder part 4 is produced.

Next, with reference to FIGS. 5 to 8, a process of producing a flat plate tensile test piece using the flat plate tensile test piece cutter according to the present invention will be described. FIG. 5 is a diagram showing a process of arranging a plurality of strip samples. A plurality of strip samples 5 collected from the metal material are arranged side by side in a lateral direction with both side surfaces exposed. Here, 15 strip samples 5 are used as an example. To arrange them integrally, grip parts 2 on both ends
It can be easily done by means such as putting a cap on the garment. On the plane of the strip sample 5a at the end, the parallel portion and the shoulder portion, which are portions to be cut, are drawn by dashed lines.

FIG. 6 is a view showing a process of installing a cutter on the flat side of the strip sample at the end. Two cutters may be prepared on the plane side of the strip sample, and the parallel part and the shoulder part on the left and right sides may be manufactured symmetrically at the same time. Here, since the manufacturing method is the same, the manufacturing of the right parallel portion and the shoulder portion will be described. The cutting edge 10a of the cutting tool 10 is positioned at the portion to be cut on the flat side of the strip sample 5a at the end. The shape of the cutting edge 10a in the longitudinal section matches the shape of the shoulder portion drawn on the plane of the strip sample 5a.

FIG. 7 is a diagram showing a process of cutting by rotating the cutter. The blade 10a of the blade 10 is
The cutter 21 is rotated while the parallel portion and the shoulder portion of the strip sample 5 do not deviate from the portion to be formed by the cutting by bringing the strip sample 5 into contact with the portion to be cut on the plane side of a. The cutting tool 10 is relatively moved to form the parallel portions 3 and the shoulder portions 4 of the plurality of strip samples 5 at the same time.

FIG. 8 is a view showing a process in which the production of a plurality of flat plate tensile test pieces has been completed. Here, a plurality of flat-plate tensile test pieces 1 are simultaneously produced and arranged. The cutter has been removed. The flat plate tensile test piece 1 has a shoulder portion 4 and a parallel portion 3 that are accurately manufactured.

As is clear from the above embodiment, the following effects can be obtained. According to the assembling apparatus of the present invention, at the time of assembling, a surface plate is installed between the base and the tool post, a frame for aligning the blade edge of the blade is provided on the surface plate, a groove is provided in the frame, and the blade tip is sharpened. Since the top is not brought into contact with the frame, the blade tip of the blade is not damaged, and the blade edge does not shift due to screw tightening or the like at the time of fixing, so that mounting accuracy can be increased.

According to the cutter of the present invention, when preparing a flat plate tensile test piece from a plurality of strip samples, the shape of the cutting edge in the longitudinal section of the blade is the same as the shape of the shoulder in the longitudinal section of the flat plate tensile test piece. Accordingly, the cutter can be rotated and the cutter relatively moved in the lateral direction of the strip sample, so that the parallel portions and the shoulder portions of the plurality of strip samples can be simultaneously and accurately and easily manufactured.

[0036]

As described above, in the assembling apparatus of the present invention, the platen is installed between the base and the tool rest, or the base and the platen are integrally formed, and the cutting edges of the cutters are aligned with the platen. By providing a top, a simple structure in which a groove is provided in the top to prevent the blade tip from coming into contact with the top, thereby facilitating replacement of a blade required for producing a test piece of a metal material, and without damaging the blade. This can be precisely and easily aligned.

In the cutter for a flat plate tensile test piece of the present invention, the shape of the cutting edge in the vertical section of the blade is the same as the shape of the shoulder in the vertical section of the flat plate tensile test piece. Thus, a flat tensile test piece can be simultaneously, accurately and easily produced from a required number of strip samples.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an assembling apparatus according to the present invention.

FIG. 2 is a diagram illustrating an example of a frame used in the present invention.

FIG. 3 is a perspective view showing an embodiment of a plate tensile test piece cutter according to the present invention.

FIG. 4 is an explanatory view of a blade constituting the cutter of the present invention.

FIG. 5 is a view showing a step of arranging a plurality of strip samples by preparing a plate tensile test piece of the present invention.

FIG. 6 is a view showing a step of installing a cutter on the flat side of a strip sample at the end by preparing a plate tensile test piece of the present invention.

FIG. 7 is a view showing a step of cutting by rotating a cutter for producing a plate tensile test piece of the present invention.

FIG. 8 is a view showing a step in which the production of a plurality of flat tensile test pieces by the production of a flat tensile test piece of the present invention is completed.

FIG. 9 is an explanatory diagram showing an example of a test piece used for a tensile test.

FIG. 10 is a view showing an example of simultaneously producing a plurality of flat plate tensile test pieces by a milling machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tensile test piece 2 gripping part 3 parallel part 4 shoulder part 5 strip sample 6 milling machine 7 assembling device 8 base 8a base main body 8b gantry 9 tool post 9a rotary shaft insertion hole 10 blade 10a blade 11 surface plate 12 frame 13 concave portion 14 convex Part 15 Shaft 16 Threaded part 17 Bolt support plate 18 Bolt holder 19 Inner surface screw 20 Groove 21 Cutter S Cutting edge

Claims (4)

[Claims] 1. An assembling apparatus for a metal material test piece cutter, comprising a step of disposing a tool post and a cutter comprising a tool attached to a peripheral surface of the tool post on a base during assembly. A metal plate, which is provided with a platen between the tool rest and a plate for aligning the blade tip of the blade on the platen, and a groove is provided in the frame so that the blade tip does not contact the frame. Equipment for assembling cutters for material specimens. 2. The apparatus according to claim 1, wherein the base and the surface plate are integrally formed. 3. A cutter for a flat plate tensile test piece made of a metal material, comprising a blade used for producing a flat plate tensile test piece comprising a grip portion, a parallel portion and a shoulder portion, and a tool rest for mounting the blade. A cutter for a flat plate tensile test piece made of a metal material, wherein a shape of a cutting edge in a vertical section is the same as a shape of a shoulder in a vertical section of the flat tensile test piece. 4. A strip sample taken from a metal material is cut by a cutter comprising a tool rest and a cutter attached to a peripheral surface of the tool rest to produce a flat tensile test piece. Both sides are exposed, and they are arranged side by side in a horizontal direction, and in the plane of the strip sample at the end, at the planned portion of the parallel portion and the shoulder portion produced by cutting, the shape of the cutting edge in the vertical section is produced as described above. A cutter having the same cutting edge shape as that of the shoulder in the vertical section is brought into contact with the blade so that the parallel portion of the strip sample and the portion where the shoulder is to be formed are not deviated, and the cutter is rotated. Making a parallel portion and a shoulder portion of a plurality of strip samples at the same time by relatively moving a cutter in a lateral direction of the plate, and manufacturing a flat plate tensile test piece by using a flat plate tensile test piece cutter made of a metal material. .