JP7360001B2 - Manufacturing method for machine tools and cutting products - Google Patents

Description

TECHNICAL FIELD This aspect generally relates to mechanical tools used in cutting operations.

BACKGROUND ART As a mechanical tool used when cutting a work material such as metal, a mechanical tool that can adjust the amount of protrusion of the cutting tool according to the size of the work material is known. For example, Patent Document 1 discloses a tool holder that constitutes such a mechanical tool. The tool holder described in Patent Document 1 has a liquid supply hole that penetrates the entire length of the holder inside the holder shank on which the tool is attached, and a stopper bolt is attached to the threaded part provided in the liquid supply hole. Adjust the amount of tool protrusion by bringing the tool into contact. The stopper bolt includes an operating member arranged in the axial direction of the liquid supply hole.

Japanese Patent Application Publication No. 8-47840

In the tool holder described in Patent Document 1, when the operating member is located on the tip side of the holder shank, the rigidity of the portion of the holder shank that is gripped by the machine tool may decrease and be crushed.

A mechanical tool according to one embodiment includes a cutting tool, a cylindrical member, and a positioning member. The cylindrical member extends from the first end to the second end. The positioning member has a columnar shape extending from the third end to the fourth end. The cylindrical member has a first portion, a second portion, and a through hole. The second portion is located closer to the second end than the first portion, and has a smaller outer diameter than the first portion. The through hole penetrates from the first end to the second end, and a part of the cutting tool is inserted into the first end side. The through hole has a first through hole and a second through hole. The second through hole is located closer to the second end than the first through hole , is located only inside the second portion , and has a larger inner diameter than the first through hole. The positioning member has a first region and a second region. The second region is located closer to the fourth end than the first region, and has a larger outer diameter than the first region. The third end abuts the rear end of the cutting tool.

The second through hole is located closer to the second end than the first portion. The cylindrical member further has a thread groove. The thread groove is located on the inner wall surface of the second through hole. The positioning member further includes a thread. The thread is located on the outer peripheral surface of the second region. The screw thread and the screw groove are screwed together. The positioning member can be moved along the direction in which the cylindrical member extends, and can adjust the amount of protrusion of the cutting tool.

According to the above aspect, it is easy to stably hold the cutting tool, and the portion held by the machine tool is less likely to be crushed.

It is a perspective view showing the machine tool of an embodiment. FIG. 2 is a plan view of the mechanical tool shown in FIG. 1 when viewed from the first end side of the cylindrical member. FIG. 3 is a plan view of the mechanical tool shown in FIG. 2 when viewed from the A1 direction. FIG. 3 is a cross-sectional view of the IV section of the machine tool shown in FIG. 2; FIG. 3 is a plan view of the mechanical tool shown in FIG. 2 viewed from direction A2. 3 is a cross-sectional view of the VI section of the machine tool shown in FIG. 2. FIG. 7 is a sectional view of the same section as FIG. 6. FIG. 7 is an enlarged view of region B1 shown in FIG. 6. FIG. It is a schematic diagram showing one process of a manufacturing method of a cutting workpiece of an embodiment. It is a schematic diagram showing one process of a manufacturing method of a cutting workpiece of an embodiment. It is a schematic diagram showing one process of a manufacturing method of a cutting workpiece of an embodiment.

<Machine tools>
Hereinafter, a mechanical tool 1 according to an embodiment will be described in detail using the drawings. However, for convenience of explanation, each figure referred to below shows only the main members necessary for explaining the embodiment in a simplified manner. Therefore, the mechanical tool 1 may include any components not shown in the respective figures referred to. Furthermore, the dimensions of the members in each figure do not faithfully represent the dimensions of the actual constituent members or the dimensional ratios of each member.

The mechanical tool 1 may include a cutting tool 3, a cylindrical member 5, and a positioning member 7, as shown in the examples shown in FIGS. 1 to 8.

The cutting tool 3 can perform cutting by contacting the workpiece. The cutting tool 3 may be an insert type or a solid type. The insert type tool is composed of multiple members, such as a holder and a cutting insert attached to the holder. The solid type is a tool that is integrally formed as a single member. The cutting tool 3 may be, for example, a drill, a milling tool, a turning tool, etc., and is not particularly limited.

The cutting tool 3 may be an insert type drill, as shown in the examples shown in FIGS. 1 to 6. More specifically, the cutting tool 3 is a tip-exchangeable drill that includes a columnar holder 9 and a cutting insert 11 (hereinafter sometimes referred to as "insert 11") attached to the tip side of this holder 9. But that's fine. The cutting tool 3 may also have a rotation axis O1. The cutting tool 3 may be rotatable around the rotation axis O1 when cutting a workpiece.

The holder 9 is not limited to a particular size. For example, the outer diameter D of the holder 9 may be set to about 3 to 60 mm. Further, the length L of the holder 9 in the direction along the rotation axis O1 may be set to about 0.5D to 20D. Examples of the material of the holder 9 include steel and cast iron.

The insert 11 may have a first cutting edge 13 . The first cutting edge 13 can be used to cut a workpiece during cutting. The insert 11 may be attached to the holder 9 such that the first cutting edge 13 projects outward from the holder 9. Examples of the material of the insert 11 include inorganic materials such as cemented carbide, cermet, and ceramics.

The cylindrical member 5 can function as a member (gripping member) that grips the cutting tool 3. The cylindrical member 5 may be a cylindrical member extending from the first end 5a to the second end 5b. Generally, the first end 5a is also called a tip, and the second end 5b is also called a rear end. Furthermore, the tube member 5 may have a cylindrical shape, but is not limited thereto.

The cylindrical member 5 may have a central axis O2. The central axis O2 is an axis passing through the center of the first end 5a and the center of the second end 5b. The cylindrical member 5 may be rotatable around the central axis O2 when cutting the workpiece. The central axis O2 may coincide with the rotation axis O1 of the cutting tool 3.

Examples of the cylindrical member 5 include an attachment used for chamfering (chamfering attachment), an arbor, and the like. Although FIGS. 1 to 8 show an example in which the cylindrical member 5 is a chamfered attachment, the present invention is not limited to this. The cylindrical member 5 may have a second cutting edge 15 located on the first end 5a side. The second cutting edge 15 can be used for chamfering. The second cutting edge 15 may be positioned so as to protrude outward on the first end 5a side.

The cylindrical member 5 is not limited to a specific size. For example, the outer diameter of the cylindrical member 5 may be set to about 10 to 100 mm. The length of the cylindrical member 5 in the direction along the central axis O2 may be set to about 20 to 300 mm. Examples of the material of the cylindrical member 5 include chromium molybdenum steel and nickel chromium molybdenum steel.

The cylindrical member 5 may have a first portion 17, a second portion 19, and a through hole 21, as shown in the examples shown in FIGS. 6 to 8. The first part 17 can function as a part for gripping the cutting tool 3. The second portion 19 can function as a portion gripped by a machine tool. The second portion 19 may be located closer to the second end 5b than the first portion 17. Further, the second portion 19 may have a smaller outer diameter than the first portion 17. In other words, the outer diameter D1 of the first portion 17 may be larger than the outer diameter D2 of the second portion 19.

The through hole 21 may extend from the first end 5a to the second end 5b, and a portion of the cutting tool 3 may be inserted into the first end 5a. The cutting tool 3 may be inserted into the through hole 21 so that at least a portion of the first cutting edge 13 protrudes from the first end 5a side.

The through hole 21 may have a first through hole 23 and a second through hole 25. The second through hole 25 may be located closer to the second end 5b than the first through hole 23 is. Further, the second through hole 25 may have a larger inner diameter than the first through hole 23. In other words, the inner diameter D3 of the first through hole 23 may be smaller than the inner diameter D4 of the second through hole 25.

The positioning member 7 can function as a member that adjusts the amount of protrusion of the cutting tool 3. The positioning member 7 may be a columnar member extending from the third end 7a to the fourth end 7b. As in the example shown in FIG. 6, the direction in which the positioning member 7 extends, that is, the direction from the third end 7a to the fourth end 7b, is the direction in which the cylindrical member 5 extends, that is, from the first end 5a to the second end 5b. It may match the direction. Further, the third end 7a can come into contact with the rear end of the cutting tool 3 (holder 9). The positioning member 7 may have a cylindrical shape, but is not limited thereto. Examples of the material of the positioning member 7 include chromium molybdenum steel and nickel chromium molybdenum steel.

The positioning member 7 may have a first region 27 and a second region 29. The second region 29 may be located closer to the fourth end 7b than the first region 27 is. Further, the second region 29 may have a larger outer diameter than the first region 27. In other words, the outer diameter D5 of the first region 27 may be smaller than the outer diameter D6 of the second region 29.

Here, as in the example shown in FIG. 7, the second through hole 25 may be located closer to the second end 5b than the first portion 17. In other words, the second through hole 25 may be located only inside the second portion 19. Further, the cylindrical member 5 may further include a thread groove 31. The thread groove 31 may be located on the inner wall surface of the second through hole 25. The positioning member 7 may further include a thread 33. In other words, the positioning member 7 may be a screw. The thread 33 may be located on the outer peripheral surface of the second region 29. Further, the thread 33 and the thread groove 31 may be screwed together.

In the above case, it is easy to stably hold the cutting tool 3, and the portion held by the machine tool is less likely to be crushed. That is, since the outer diameter D1 of the first portion 17 is larger than the outer diameter D2 of the second portion 19, the thickness of the first portion 17, which is the portion that grips the cutting tool 3, is thick and stabilizes the cutting tool 3. Easy to grip. Furthermore, since the second region 29 of the positioning member 7 having a relatively large outer diameter is located inside the second portion 19, which is the portion to be gripped by the machine tool, the rigidity of the second portion 19 can be maintained. , and the second portion 19 is not easily crushed. Since the screw thread 33 and the thread groove 31 are screwed together, when the positioning member 7 is turned, the positioning member 7 can be moved along the extending direction of the cylinder member 5, and the cutting tool 3 can be removed from the cylinder member 5. The amount of protrusion can be adjusted.

Note that a portion of the first through hole 23 may be located inside the second portion 19. The inner diameter D3 of the first through hole 23 may be constant or may vary.

The second through hole 25 may be open at the second end 5b. In this case, the positioning member 7 can be inserted into the through hole 21 from the second end 5b side. As a result, it becomes possible to integrally form the first portion 17 with one member.

The second region 29 may include a fourth end 7b. The positioning member 7 may further include a first recess 35 located at the fourth end 7b. The first recess 35 can function as a part for rotating the positioning member 7. Examples of the shape of the first recess 35 include a groove shape and a hole shape. These points also apply to the second recess described later. When the positioning member 7 has the first recess 35, it becomes possible to rotate the positioning member 7 through the first recess 35 from the second end 5b side. Therefore, the amount of protrusion of the cutting tool 3 can be adjusted while the cutting tool 3 is held by the cylindrical member 5.

In the direction in which the positioning member 7 extends, the width W1 of the first recess 35 and the width W2 of the second region 29 are not limited to specific values. The width W1 may be less than half the width W2. In this case, since the second region 29 can stably support the second portion 19, the second portion 19 is less likely to collapse.

The positioning member 7 may further include a second recess 37 located at the third end 7a. In this case, the positioning member 7 can be rotated from the first end 5a side through the second recess 37.

The outer diameter D2 of the second portion 19 may be constant or may vary. When the outer diameter D2 of the second portion 19 is constant, it is easy to ensure the thickness of the second portion 19, and the second portion 19 is difficult to collapse. Note that, like the second portion 19, the outer diameter D1 of the first portion 17 may be constant or may vary.

The cylindrical member 5 may have a hole 39 penetrating from the outer circumferential surface of the cylindrical member 5 to the through hole 21, as shown in an example shown in FIG. The hole 39 may have a threaded groove. The hole 39 can be used to fix the cutting tool 3 to the cylindrical member 5. For example, the cutting tool 3 may be screwed and fixed to the cylindrical member 5 by inserting the fixing screw 41 into the hole 39. At this time, an elastic member 43 may be interposed between the fixing screw 41 and the cutting tool 3. Examples of the elastic member 43 include a spring made of metal or resin, a resin sheet, and the like. Note that the method for fixing the cutting tool 3 to the cylindrical member 5 is not limited to the above-mentioned fixing with screws.

The cylindrical member 5 may have a third portion 45. The third portion 45 can function as a portion that assists the first portion 17 in gripping the cutting tool 3 . The third portion 45 may be located closer to the first end 5a than the first portion 17. Further, the outer diameter of the third portion 45 may increase as it moves away from the first end 5a. The second cutting edge 15 described above may be located in the third portion 45. More specifically, the cylindrical member 5 may have a tip 47 attached to the third portion 45, and this tip 47 may have the second cutting edge 15.

<Method for manufacturing cut workpieces>
Next, a method for manufacturing the cut workpiece 101 according to the embodiment will be described using the drawings.

The cut workpiece 101 is produced by cutting a workpiece 103. The method for manufacturing the cut workpiece 101 in the embodiment may include the following steps. That is,
(1) A step of rotating the mechanical tool 1 typified by the above embodiment;
(2) a step of bringing the cutting tool 3 in the rotating machine tool 1 into contact with the workpiece 103;
(3) a step of separating the cutting tool 3 from the workpiece 103;
may be provided.

To explain more specifically, in the step (1), as shown in the example shown in FIG. By moving, the cutting tool 3 and the workpiece 103 may be brought relatively close to each other. Further, the step (1) can be carried out, for example, by fixing the workpiece 103 on the table of a machine tool to which the machine tool 1 is attached, and bringing the machine tool 1 close to the workpiece 103 while rotating. You may go.

In the step (2), as shown in the example shown in FIG. A processed hole (through hole) 105 may be formed.

In the step (3), as in the example shown in FIG. 11, the cutting tool 3 may be moved away from the workpiece 103 by moving in the Y3 direction.

According to the method for manufacturing the cut workpiece 101 of the embodiment, since the cutting tool 3 is easily held stably and the machine tool 1 is used in which the portion gripped by the machine tool is not easily crushed, the machined hole can be machined with high precision. A cutting workpiece 101 having 105 can be obtained.

In addition, in the cutting process in the manufacturing method of the embodiment, in each step, the cutting tool 3 is brought into contact with the workpiece 103 by moving the machine tool 1, or the cutting tool 3 is separated from the workpiece 103. However, it is of course not limited to this form.

For example, in the step (1), the workpiece 103 may be brought closer to the cutting tool 3. Similarly, in the step (3), the workpiece 103 may be moved away from the cutting tool 3. When continuing the cutting process, it is sufficient to keep the cutting tool 3 in a rotated state and repeat the process of bringing the first cutting edge 13 of the insert 11 into contact with different locations on the workpiece 103.

Note that typical examples of the material of the work material 103 include carbon steel, alloy steel, stainless steel, cast iron, and nonferrous metals.

Although the method for manufacturing the machine tool 1 and the cut workpiece 101 of the embodiment has been illustrated above, the present disclosure is not limited to the above embodiment, and any method may be used as long as it does not depart from the gist of the present disclosure. Needless to say.

For example, in the above embodiment, the cutting tool 3 is a drill, but instead, the cutting tool 3 can be, for example, a turning tool. In this case, in step (1) of the method for manufacturing the cut workpiece 101, the workpiece 103 may be rotated.

1... Machine tool 3... Cutting tool 5... Cylinder member 5a... First end 5b... Second end 7... Positioning member 7a... Third end 7b... Fourth end 9. ...Holder 11...Cutting insert (insert)
13... First cutting edge 15... Second cutting edge 17... First part 19... Second part 21... Through hole 23... First through hole 25... Second Through hole 27...first region 29...second region 31...screw groove 33...screw thread 35...first recess 37...second recess 39...hole 41... - Fixing screw 43... Elastic member 45... Third part 47... Chip 101... Cutting workpiece 103... Work material 105... Machining hole O1... Rotating shaft O2...・Central axis D1...Outer diameter D2...Outer diameter D3...Inner diameter D4...Inner diameter D5...Outer diameter D6...Outer diameter W1...Width W2...Width

Claims (6)

cutting tools and
a cylindrical member extending from the first end to the second end;
a columnar positioning member extending from the third end to the fourth end,
The cylindrical member is
The first part and
a second portion located closer to the second end than the first portion and having a smaller outer diameter than the first portion;
a through hole that extends from the first end to the second end and into which a part of the cutting tool is inserted on the first end side;
The through hole is
a first through hole;
a second through hole located closer to the second end than the first through hole, and having a larger inner diameter than the first through hole;
The positioning member is
a first area;
a second region located closer to the fourth end than the first region and having a larger outer diameter than the first region;
the third end abuts a rear end of the cutting tool;
The second through hole is located closer to the second end than the first portion, and is located only inside the second portion,
The cylindrical member further has a thread groove located on the inner wall surface of the second through hole,
The positioning member further includes a screw thread located on the outer peripheral surface of the second region,
the screw thread and the screw groove are screwed together;
A mechanical tool, wherein the positioning member is movable along the extending direction of the cylindrical member to adjust the amount of protrusion of the cutting tool. The machine tool according to claim 1, wherein the second through hole is open at the second end. the second region includes the fourth end,
The machine tool according to claim 1 or 2, wherein the positioning member further has a first recess located at the fourth end. The machine tool according to claim 3, wherein the width of the first recess is less than half the width of the second region in the direction in which the positioning member extends. A mechanical tool according to any one of claims 1 to 4, wherein the second portion has a constant outer diameter. A step of rotating at least one of the machine tool and the workpiece according to any one of claims 1 to 5;
a step of bringing the cutting tool in the mechanical tool into contact with the workpiece;
A method for manufacturing a cut workpiece, comprising the step of separating the cutting tool from the workpiece.

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