JP2000000719A - Different-diameter hole high-concentricity simultaneous machining tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool capable of machining different-diameter hole concentricity machined material simultaneously with high concentricity. SOLUTION: A different-diameter hole high-concentricity simultaneous machining tool is composed of a sheath tool 1 comprising in order from the tip to the rear end, a pilot guide part 2, an expanded/contracted small-diameter cutter part 3 with an expanded/contracted slit 3a disposed lengthwise, an expanded/ contracted large-diameter cutter part 4 with an expanded/contracted slit 4a disposed lengthwise, a back guide part 5, and a machine fitting shank 6; an expanding/contracting means 7 pushed into the expanded/contracted small- diameter cutter part 3 from the pilot guide part 2 side; and an expanding/ contracting means 8 pushed into the expanded/contracted large-diameter cutter part 4 from the shank 6 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expandable and contractible diamond reamer and a CBN reamer used for simultaneous machining of stepped holes of different diameters.

[0002]

2. Description of the Related Art At present, high-core (micron order) processing of different diameter step holes of the same body is performed by first processing a small diameter hole as a first step, and replacing a large diameter hole with a tool.・ Reverse the work and perform secondary processing. Further, in order to obtain high concentricity precision, additional processing using a finishing tool is required.
However, after several steps as described above, tool exchange,
The work of attaching / detaching and reversing requires a great deal of work, and concentricity processing of micron order has been considered to be extremely difficult.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional circumstances, and is intended to simultaneously perform high-core (micron-order) machining of different diameter step holes of the same body (one step). ) To provide a tool to be realized by processing.

[0004]

In order to achieve the above-mentioned object, the present invention provides a pilot guide part 2, an enlarged / reduced-diameter blade part 3 provided with a longitudinally extending / reduced slit 3a from a front end to a rear end, and a length. Large-diameter blade section 4 having expansion / reduction slits 4a in the direction, back guide section 5, machine mounting shank 6
, A expanding and contracting means 7 which is pushed from the side of the pilot guide portion 2 to the inside of the enlarged / reduced diameter blade portion 3, and which is pushed from the side of the shank 6 to the inside of the enlarged / reduced large diameter blade portion 4. This is a tool for simultaneous processing of different concentric holes and high concentricity, comprising an expanding / contracting means 8.

[0005] In the above structure, the expansion and contraction means 7 and 8 are provided.
Is a male propulsion screw member 10 having a wrench hole 10a in the head.
A tape cone 11 hung at the tip of the body through a bolt 9
And a cone push 12 interposed between the taper cone 11 and the protruding male screw member 10. By turning the propulsion male screw member 10 by a wrench, the enlarged / reduced diameter blade portion 3 and the enlarged / reduced large diameter member are formed. This is a tool for simultaneous processing of different concentric holes and high concentricity in which each of the blade portions 4 can be adjusted to expand and contract.

In each of the above constructions, there is provided a tool for simultaneously machining different concentric holes with high concentricity in which an oil groove 15 is provided in the length direction except for the shank 6.

[0007]

In order to use the tool of the present invention configured as described above, as shown in FIG. 4 from the state of FIG. By operating the expanding / contracting means 7 pushed into the inside of the enlarged / reduced diameter blade part 3 from the pilot guide part 2 side, more specifically, turning the propulsion male screw member 10 by a wrench, the cone push 1
The taper cone 11 is pushed through the taper 2 to adjust the expansion and contraction of the expansion and contraction slit 3a of the blade 3 with a uniform force.
Then, the size of the expansion / contraction slit 3a of the blade unit 3 is reduced and adjusted.

The expanding / reducing large-diameter blade portion 4 is operated by operating expanding / reducing means 8 which is pushed into the expanding / reducing large-diameter blade portion 4 from the shank 6 side of the sheath-shaped tool 1, and more specifically, the propulsion male screw. By rotating the member 10 with a wrench, the cone push 1
The taper cone 11 is pushed through the taper 2 to adjust the expansion and contraction of the expansion and contraction slit 3a of the cutter blade 3 with a uniform force. On the contrary, the taper cone is turned through the wrench 9 by turning the wrench.
After adjusting the size of the expanding / contracting slit 4a of the enlarged / contracted large-diameter blade portion 4, the shank 6 is mounted on the machine.

As shown in FIG. 5, the pilot guide portion 2 is inserted into a step hole of a different diameter of the work which has been roughed with a cutting tool in advance.
After insertion and setting, rotation grinding should be performed.

Then, as shown in the figure, the small-diameter hole d and the large-diameter hole D are simultaneously processed and finished, and the micron-order hole d and the large-diameter hole D are simultaneously processed.
High concentricity is obtained. As a result, the processing time can be greatly reduced, the production efficiency can be increased, and a highly accurate product with concentricity can be uniformly obtained, and the economic effect is also large.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, a pilot guide portion 2 having an oil groove 15 provided on the outer periphery from the front end to the rear end, an oil groove 15 and an expansion / contraction slit 3a provided on the outer periphery in the longitudinal direction.
The blades 3 are provided with the oil groove 15 on the outer periphery in the longitudinal direction.
A large-diameter blade 4 having an expansion / contraction slit 4a, a back guide 5 having an oil groove 15 on the outer periphery in the longitudinal direction, and a sheath-shaped tool 1 formed on a machine mounting shank 6; A tape-copper hung via a bolt 9 at the tip of a propulsion male screw member 10 having a wrench hole 10a in the head pushed into the blade portion 3 from the guide portion 2 side.
Expansion and contraction means 7 comprising a cone 11 and a cone push 12 interposed between the taper cone 11 and the propulsion male screw member 10 and pushed into the expansion and contraction large-diameter blade portion 4 from the shank 6 side. A tape connector fixed to the tip of a propulsion male screw member 10 having a wrench hole 10a in the head via a bolt 9
This is a tool for simultaneous processing of different concentric holes and high concentricity, comprising an expansion and contraction means 8 comprising a cone 11 and a cone push 12 interposed between a taper cone 11 and a propulsion male screw member 10.

In FIG. 1, reference numeral 13 denotes a set screw hole for setting the expansion / contraction means 7 and 8 to the expansion / contraction adjustment position, and reference numeral 14 denotes a set screw screwed into the screw hole 13.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a longitudinal sectional side view.

FIG. 3 is an exploded vertical side view.

FIG. 4 is a longitudinal sectional side view of a main part of the expansion / contraction means.

FIG. 5 (a) is a partial longitudinal side view of a stepped body having a different diameter;
(B) is a partial vertical sectional side view of a machined body with a stepped hole of different diameter showing a machined state by the tool of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath-shaped tool 2 Pilot guide part 3 Enlarged / reduced diameter blade part 3a Enlarged / reduced slit 4 Enlarged / reduced large diameter blade part 4a Enlarged / reduced slit 5 Back guide part, 6 Machine mounting shank 7 Enlargement / reduction means 8 Enlargement / reduction means 9 Bolt 10 Propulsion male screw member 10a Wrench Hole 11 taper cone 12 cone push 13 set screw hole 14 holding screw 15 oil groove

Claims (3)

[Claims] From a front end to a rear end, a pilot guide part (2), an enlarged / reduced-diameter blade part (3) provided with a longitudinally extending / reducing slit (3a), and a longitudinally extending / reducing slit (4a).
And a sheath-shaped tool (1) formed sequentially on a large-diameter blade part (4), a back guide part (5), and a machine-mounting shank (6), and a contraction / expansion from the pilot guide part (2) side. Small-diameter blade part (3) Expansion and contraction means (7) pushed inside
A tool for simultaneously processing high-concentricity holes of different diameters, comprising: an expanding / contracting means (8) pushed into the inside of the enlarged / contracted large-diameter blade part (4) from the shank (6) side. 2. A tape-coupling device in which expansion and contraction means (7) and (8) are suspended via a bolt (9) at the tip of a propulsion male screw member (10) having a wrench hole (10a) in its head. (1
1) and a cone push (12) interposed between the tape cone (11) and the male propulsion member (10), and the wrench is used to turn the male propulsion member (10). 2. The tool according to claim 1, wherein the diameter of the enlarged / reduced-diameter blade part (3) and the diameter of the enlarged / reduced-diameter blade part (4) can be adjusted. 3. The tool according to claim 1, wherein an oil groove (15) is provided in a longitudinal direction of the portion excluding the shank (6).