JPH10249612A - Turning tool holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit the replacement work for a turning tool by fitting plural turning tools to plural turning tool fixing parts, and fixing these turning tools by the fixing means. SOLUTION: A rough cutting turning tool 20 is fixed by a fixing means 9 in such a manner that a rough cutting blade 20c is arranged in The end part 11c of a first Turing tool storing groove 11a formed on the turning tool holder main body 7. A finishing turning tool 26 is fixed in such a manner as to be freely positioned by a fixing means comprising a female screw part formed below a second turning tool storing groove 12a of a second side surface 12 and a bolt screwed on the female part. The rough cutting turning tool 20 fixed to the turning tool holder 5 and the finishing turning tool 26 are abutted with the inner surface 1a of a work 1 to work the inner surface 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool holder for holding a cutting tool used for lathe processing.

[0002]

2. Description of the Related Art As is well known, there is lathe processing as a method of processing a metal material. FIG. 3 shows this lathe processing. In the figure, reference numeral 1 denotes a work which is a workpiece, 2
Is a byte. The work 1 is a hollow cylindrical body having an inner surface 1a. The work 1 is fixed to a chuck (not shown), and is rotated around the axis 3 together with the chuck. The cutting tool 2 is located inside the work 1 and is fixed by a cutting tool holder 4. The cutting tool 2 has a cutting edge 2a at the tip, and the cutting edge 2a
The inner surface 1a is machined by contacting the inner surface 1a. The tool holder 4 fixes the tool 2 and is attached to a lathe body (not shown).

As shown in FIG. 4, the cutting tool 2 is mounted below a horizontal line L1 passing through an axis 3 which is the center of rotation O of the work 1. That is, the cutting tool 2 is attached at a predetermined distance from the plane including the rake face 2b, which is the upper surface of the cutting edge 2a of the cutting tool 2, and the rotation center O, that is, at a predetermined center height h. The center height h is set for each cutting tool according to the machinability of the work 1 and the required roughness of the finished surface.

In general, when machining the inner surface 1a of the work 1, the inner surface 1a is roughly formed using a rough cutting tool, and then the inner surface 1a is finished to a predetermined surface roughness using a finishing tool. An inner surface 1a is formed.

[0005]

By the way, in the above-mentioned machining step, after the inner surface 1a of the work 1 is always machined with the roughing cutting tool, the rough cutting tool is removed from the tool holder 4, and the finishing tool is replaced with the tool holder. After performing the replacement work by attaching to the inner surface 1a, a step of finishing the inner surface 1a was required. Moreover, since the core height h must be adjusted each time the cutting tool is replaced, the operation becomes very complicated, and it has been difficult to realize cost reduction by mass production.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a tool holder that does not require the exchange of a tool in a machining process using a lathe.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the following means has been adopted in the bite holder of the present invention.
The tool holder according to claim 1, which is a tool holder for holding a cutting tool used for lathe processing, the tool holder body having a plurality of tool fixing portions for holding a plurality of the tools, and the tool fixing portion. And fixing means for fixing the cutting tool arranged at a position so as to be position-adjustable.

[0008] By attaching a plurality of bytes to a plurality of byte fixing portions and fixing these bytes by a fixing means, a plurality of bytes are fixed to one byte holder.

[0009] The tool holder according to the second aspect is the first aspect.
In the bite holder according to the present invention, each of the bite fixing portions extends linearly on a bite fixing surface formed in the bite holder main body, and the shank has a rectangular cross section. The tool has a configuration in which a bite storage groove is formed, and the fixing means includes a female screw portion formed in a wall portion forming the bite storage groove, and a bolt screwed into the female screw portion to fix the bite in a position-adjustable manner. And characterized by the following.

[0010] The cutting tool is inserted and arranged in the cutting tool storage groove.
It is fixed so that the position can be adjusted by a bolt screwed into the female thread portion.

According to a third aspect of the present invention, there is provided a cutting tool holder.
In the bite holder, the bite-storing groove is configured such that one inner surface on which one outer surface of the bite is disposed to face is a reference surface for determining a position of a rake face of the bite,
The reference surface of each of the bite storage grooves is formed so as to be positioned at a certain angle.

Since the reference surface of each bite storage groove is formed at a certain angle, the rake face of each bite fixed to each bite storage groove is formed at a certain angle.

According to a fourth aspect of the present invention, there is provided a tool holder according to the third aspect.
In the bite holder described in the above, the bite storage groove is in a state where one of the bite storage grooves and another of the bite storage grooves intersect with each other when a top view of the bite holder main body is viewed from a position opposed to the upper surface. While being arranged, the end of the one bite storage groove where the cutting edge of the bite is arranged, and the end of the other bite storage groove where the bite of the bite is arranged are arranged so as to vertically overlap each other. It is characterized by the following.

Since the cutting edge of one cutting tool and the cutting edge of the other cutting tool are arranged so as to overlap with each other vertically, these cutting edges are arranged in the direction along the rotation direction of the work.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a view for explaining an embodiment of the present invention. Reference numeral 1 denotes a work, and 5 denotes a tool holder. The work 1 is a bottomed cylindrical body having a bottom 1b, is fixed by a chuck (not shown), and is rotatable around the axis 3 together with the chuck.

The tool holder 5 is fixed to a lathe body 6 and has a tool holder body 7 and fixing means 9 for fixing the tool so that its position can be adjusted.

The tool holder body 7 is a plate-like body, and has a shape in which a projecting portion 10 is formed on the left side of the lower surface 7a of the tool holder 7. This tool holder body 7 has
A first side surface (bite fixing surface) 11 and the first side surface 11
A first bite storage groove 11a and a second bite storage groove 12a are formed on a second side surface (bite fixing surface) 12 which intersects the right angle with the above.

As shown in FIG. 1, the first bite storage groove 11a extends linearly in a substantially horizontal direction on the first side surface 11, and has a rectangular cross section.

The fixing means 9 comprises a female thread 15 and a bolt 16. Three female threads 15 are formed above the first bite storage groove 11a in such a manner as to have a vertical axis. The bolt 16 is screwed to the female thread portion 15, and the lower end of the bolt 16 abuts on the upper surface of a rough cutting tool 20, which will be described later, so as to fix the rough cutting tool 20 in a position-adjustable manner. ing.

The rough cutting tool 20 is inserted and arranged in the first tool storage groove 11a, and has a shank 20 having a rectangular cross section.
a and a head 20b, and a rough cutting edge (cutting edge) 20c is attached to the head 20b. The roughing cutting tool 20 is fixed by the fixing means 9 in a state where the rough cutting cutting edge 20c is disposed at the end 11c of the first cutting tool storing groove 11a. In this case, the lower side surface (one inner surface) 11b forming the first bite storage groove 11a is a surface on which the lower surface (one outer surface) 21 of the roughing bite 20 is arranged to face the rough cutting bit. It is a first reference plane 23 for determining the position of the tool bit 20.

As shown in FIG. 2, the second bite storage groove 12a extends linearly upward and diagonally to the left on the second side surface 12, and has a rectangular cross section. . The finishing bit 26 is provided in the second biting groove 12a.
Are inserted and arranged with the finishing cutting blade (cutting edge) 26c arranged at the end 12c of the second bite housing groove 12a. The finishing bit 26 is positioned by a fixing means 9 including a female screw portion 28 formed below the second bite housing groove 12 a on the second side surface 12 and a bolt 29 screwed into the female screw portion 28. Adjustably fixed.
In this case, the upper surface (one inner surface) 12b forming the second bite storage groove 12a is a surface on which the upper surface (one outer surface) 30 of the finishing bit 26 is arranged to face the finishing bit 26. The second reference plane 31 determines the position of the cutting tool 26.

The center height of the rough cutting tool 20 and the finishing tool 26 is determined by the tool holder 5 having the above structure as follows. The rough cutting tool 20 is formed by the first reference surface 23 of the first tool storage groove 11a.
Is determined. Then, the plane including the upper surface of the rough cutting blade 20c of the rough cutting tool, that is, the position of the rake face 24 is also determined. By determining the position of the rake face 24, the center height h1 is determined as shown in FIG. Similarly, finishing bit 2
The plane including the upper surface of the finishing blade 26c of No. 6, ie, the position of the rake face 33 is also determined as the second reference plane 12b, and the center height h2 is determined as shown in FIG.

Further, the first bite storing groove 11a and the second bite storing groove 12a are arranged in a state of intersecting the upper surface 7b of the bite holder body 7 in a plan view from a position facing the upper surface 7b. At the same time, the end portion 11c of the first bite storage groove 11a and the end portion 12c of the second bite storage groove 12a are arranged so as to overlap each other. That is, the rough cutting edge 20c and the finishing cutting edge 26c are arranged vertically (see FIG. 1).

Next, a case will be described in which the inner surface 1a of the work 1 is turned using the cutting tool holder 5 having the above-described configuration to process a bottomed cylindrical container with the bottom 1b left.
The work 1 is rotationally driven together with a chuck for fixing the work 1. The tool holder 5 attached to the lathe main body 6 is advanced leftward in FIG. Then, while the tool holder 5 advances at a constant feed speed, the rough cutting tool 20 and the finishing tool 26 fixed to the tool holder 5 are attached to the inner surface 1a of the work 1.
, The inner surface 1a is machined. Then, by stopping the advance of the bite holder 5 at a predetermined position and finishing the processing, the bottomed cylindrical container having the bottom 1b is processed.

In the above machining step, the rough cutting tool 2
By attaching 0 and the finishing tool 26 to the tool holder 5, it becomes possible to perform roughing and finishing at the same time. Further, since the first reference surface 23 and the second reference surface 31 are formed at a fixed angle, the center heights h1 and h of the roughing bit 20 and the finishing bit 26 are formed.
2 can be set independently. Also,
Since the cutting edge 20c for rough cutting and the cutting edge 26c for finishing are arranged vertically, as shown in FIG. Roughing and finishing can be simultaneously performed up to the inner surface 1a (the left end of the inner surface 1a in FIG. 1).

In this embodiment, the tool holder 5 capable of simultaneously attaching two tools has been described.
However, the present invention is not limited to this, and a tool holder to which three or more tools can be attached may be used. Further, the present embodiment has been described in the case where the inner surface 1a of the work 1 is machined.

[0027]

As described above, according to the cutting tool holder of the present invention, the following effects can be obtained. According to the byte holder according to the first aspect, since a plurality of bytes are attached to the plurality of byte fixing portions and these bytes are fixed by the fixing means, the plurality of bytes are fixed to one byte holder. In addition, the work of exchanging the cutting tool can be omitted, and the machining process can be simplified.

According to the second aspect of the present invention, the bite is inserted and arranged in the bite storage groove and is fixed to the bite storage groove with bolts so that the position of the bite can be adjusted freely. It becomes possible.

According to the third aspect of the present invention, since the reference surface of each of the bite storage grooves is formed at a constant angle, the rake face of the bite fixed to each of the bite storage grooves has a constant angle. Will be formed with
The core height can be arbitrarily adjusted for each byte.

According to the fourth aspect of the present invention, the cutting edge of one cutting tool and the cutting edge of another cutting tool are arranged so as to be vertically overlapped with each other. Can be arranged. Therefore, in the case of the stop hole processing, it is possible to simultaneously perform processing to one end of the inner surface close to the bottom of the work using one bite and another bite.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment using a tool holder according to the present invention, and is a front sectional view showing a state where an inner surface of a work is being machined.

FIG. 2 is a side view of the tool holder shown in FIG.

FIG. 3 is a plan view showing a conventional technique.

FIG. 4 is a view showing the position of the cutting tool of FIG. 3 with respect to a work.

[Explanation of symbols]

 5 Tool Holder 7 Tool Holder Main Body 9 Fixing Means 11 Tool Fixing Surface 11a Tool Fixing Part (Bit Retaining Groove) 11b One Inner Surface 11c End Part 12 Tool Fixing Surface 12a Tool Fixing Part (Bit Retaining Groove) 15 Female Thread 16 Bolt 20 Tool 20a Shank 20c Cutting edge 21 One outer surface 23 Reference surface 26 Tool 26c Cutting edge 28 Female thread 29 Bolt 31 Reference surface 33 Rake surface

Claims (4)

[Claims] 1. A tool holder for holding a cutting tool used for lathe processing, comprising: a tool holder body having a plurality of tool fixing portions for holding a plurality of the tools; and a tool holder disposed on the tool fixing portion. A tool for fixing the tool so that its position can be adjusted. 2. The tool holder according to claim 1, wherein each of the tool fixing portions is linearly formed on a tool fixing surface formed on the tool holder main body for a tool whose shank has a rectangular cross section. The fixing means includes a female screw portion formed on a wall portion forming the bite storing groove, and the bite screwed into the female screw portion. And a bolt for adjusting the position of the tool. 3. The cutting tool holder according to claim 2, wherein the cutting tool groove has an inner surface on which one outer surface of the cutting tool is opposed to an inner surface serving as a reference surface for determining a position of a rake face of the cutting tool. And a tool holder characterized in that the reference surfaces of the tool storage grooves are formed so as to be positioned at a certain angle. 4. The tool holder according to claim 3, wherein the tool storage groove is formed in a plane from a position where one tool storage groove and another tool storage groove face the upper surface of the tool holder body from the upper surface. As viewed from above, while being arranged in an intersecting state, an end portion of the one bite storage groove where the cutting edge of the bite is arranged and an end portion of the other bite storage groove where the cutting edge of the bite is arranged are mutually connected. A tool holder characterized by being arranged vertically one above the other.