KR101943565B1 - Run-out tester for small diameter type cutting tool - Google Patents

Abstract

The present invention relates to a cutting tool holder, comprising: a body having a receiving hole, a first surface which is a surface of the cutting tool holder approaching the receiving hole, and a second surface opposite to the first surface; A tube chain retainer inserted into the receiving hole to receive the cutting tool holder and having an inner diameter on the first surface side larger than an inner diameter on the second surface side corresponding to an outline of the cutting tool holder; And a cutting tool holder mounted on the second surface of the body to correspond to the cutting tool holder and deflecting the cutting tool holder received in the retainer in an insertion direction toward the second surface from the first surface, Out tester for a small diameter toolholder, comprising an alignment unit for aligning the body along an alignment axis of the body within a retainer.

Description

RUN-OUT TESTER FOR SMALL CUTTING TOOL HOLDER {RUN-OUT TESTER FOR SMALL DIAMETER TYPE CUTTING TOOL}

The present invention relates to a run-out tester for a small-diameter cutting tool holder and a run-out tester having the same.

Generally, a machine tool is a device for machining an object by using a cutting tool.

Such a machine tool is connected to the cutting tool through a cutting tool holder. With this connection structure, the cutting tool holder must firmly clamp the cutting tool so that the cutting tool can accurately work on the workpiece.

In addition, the cutting tool holder must be manufactured so that its center of rotation is correct along the direction in which the cutting tool acts on the object. Thus, the rotation accuracy of the cutting tool can be increased. A run-out tester can be used to ascertain the manufacturing status of such a cutting tool holder.

However, in the case of a small-diameter type having a small size of the cutting tool holder, its own weight is small, and the cutting tool holder is not properly aligned on the run-out tester itself.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a run-out tester for a small-diameter cutting tool holder that allows a small-diameter cutting tool holder to perform a run-out experiment while being properly aligned along an alignment axis.

A run-out tester for a small-diameter cutting tool holder according to an aspect of the present invention for realizing the above-mentioned problem is provided with a receiving hole, a first surface which is a surface of the cutting tool holder approaching the receiving hole, A body having an opposing second side; A tube chain retainer inserted into the receiving hole to receive the cutting tool holder and having an inner diameter on the first surface side larger than an inner diameter on the second surface side corresponding to an outline of the cutting tool holder; And a cutting tool holder mounted on the second surface of the body to correspond to the cutting tool holder and deflecting the cutting tool holder received in the retainer in an insertion direction toward the second surface from the first surface, And an alignment unit for aligning the body within the retainer along an alignment axis of the body.

Here, the aligning unit may include a magnet for applying a magnetic attractive force along the inserting direction to the cutting tool holder.

Here, the alignment unit may further include a housing for receiving the magnet.

Here, the housing includes: a base portion coupled to the second surface; And a moving part on which the magnet is mounted and which is movably installed on the base part toward the cutting tool holder.

Here, the base portion may be a hollow body having an inner peripheral surface formed on the inner peripheral surface thereof, and the moving portion may be a cylindrical body having a male thread on the outer peripheral surface thereof.

Here, the cylindrical body includes: a seating groove on which the magnet is seated; And a driver groove formed on the opposite side of the seating groove.

Here, the hollow body may include a discharge hole that is opened through the female thread to allow foreign matter in the hollow body to be discharged to the outside.

According to the run-out tester for a small-diameter cutting tool holder according to the present invention, the small-diameter cutting tool holder can perform a run-out test while being properly aligned along the alignment axis.

1 is a perspective view showing a run-out tester 100 according to an embodiment of the present invention.
2 is a cross-sectional view showing a coupling relationship between the body 110 and the alignment unit 170 of FIG.
3 is a partially cut exploded perspective view of the alignment unit 170 of FIG.
FIG. 4 is a photograph showing a comparative experiment of the degree of alignment of the holder with respect to the run-out tester 100 according to an embodiment of the present invention and another tester.

Hereinafter, a run-out tester for a small diameter tool holder according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations.

Figure 1 is a perspective view of a run-out tester 100 in accordance with one embodiment of the present invention.

Referring to this figure, the run-out tester 100 may include a body 110, a mount 130, a retainer 150, and an alignment unit 170 (FIG. 2).

The body 110 is configured to receive and support the cutting tool holder H (Fig. 2). For this purpose, a receiving hole 115 is formed in the body 110. The cutting tool holder H inserted into the receiving hole 115 is erected along a direction substantially perpendicular to the body 110.

The holder 130 is a structure in which the body 110 is fitted. The holder 130 is supported on the ground so that the body 110 is separated from the ground. Thereby, even if the cutting tool holder H protrudes through the body 110, it does not interfere with the ground.

The retainer 150 is inserted into the receiving hole 115 and positioned between the body 110 and the cutting tool holder H. [ The retainer 150 is a tube having a shape corresponding to the contour of the cutting tool holder H. A plurality of balls 155 (see FIG. 2) are rotatably mounted on the body 151 of the retainer 150. Thereby, the cutting tool holder H becomes rotatable relative to the retainer 150.

The aligning unit 170 is a structure in which the cutting tool holder H received in the retainer 150 is guided exactly in alignment with the set alignment axis A. This alignment unit 170 is even more useful when the cutting tool holder H is a lightweight type of small diameter type.

A specific description of this alignment unit 170 will be described with reference to Figs. 2 and 3. Fig.

FIG. 2 is a cross-sectional view showing the coupling relationship between the body 110 and the alignment unit 170 of FIG. 1, and FIG. 3 is a partially cut exploded perspective view of the alignment unit 170 of FIG.

Referring to these drawings, first of all, the body 110 may have the form of a generally cylindrical block. The upper surface of the body 110 may be a first surface 111 and a surface on which the cutting tool holder H approaches toward the receiving hole 115. [ On the contrary, the lower surface of the body 110 may be a second surface 112, which is opposite to the first surface 111.

The receiving hole 115 is formed to penetrate the second surface 112 from the first surface 111 and the opening surface area on the first surface 111 side is formed larger than the second surface 112 side. Thereby, the retainer 150 and the cutting tool holder H are supported on the body 110 by the shape of the receiving hole 115 to maintain the height.

The aligning unit 170 deflects the cutting tool holder H in the inserting direction from the first side 111 to the second side 112 so that the cutting tool holder H can move along the alignment axis A So that they are accurately aligned.

For this purpose, the alignment unit 170 may comprise a magnet 171 and a housing 175.

The magnet 171 is located on the second surface 112 side so that the cutting tool holder H stands straight without departing from the alignment axis A while being attracted by the magnetic attractive force along the inserting direction.

The housing 175 may be an object on which the magnet 171 is installed and may be installed on the second surface 112 of the body 110. Specifically, the housing 175 may have a base portion 176 and a moving portion 177.

The base portion 176 may be composed of a flange portion 176a coupled to the body 110 and a cylinder portion 176b extending from the flange portion 176a. The flange portion 176a may be inserted and coupled to the second surface 112 of the body 110. The cylinder portion 176b may protrude from the flange portion 176a and have a cylinder shape penetrating to the flange portion 176a. Thus, the base portion 176 may be referred to as a hollow body. A female screw thread 176c may be formed on the inner circumferential surface of the inner space of the cylinder portion 176b. Further, the base portion 176 may have a discharge hole 176d which is opened through the female thread 176c.

The moving part 177 is an object on which the magnet 171 is mounted and is movably installed in the base part 176 toward the cutting tool holder H. [ Specifically, the moving portion 177 is a generally cylindrical body, and a male screw thread 177a is formed on the outer circumferential surface thereof. On the upper surface of the moving part 177, there is formed a seating groove 177b on which the magnet 171 is seated. A driver groove 177c into which the driver is inserted may be formed on the opposite side of the seating groove 177b. In addition, the seat 177b is provided with a cover 178 to prevent the magnet 171 from adhering foreign matter.

According to this configuration, the magnet 171 is protected by the cover 178 while being installed in the seating groove 177b of the moving part 177. [ As a result, the magnet 171 magnetically pulls the cutting tool holder H made of a metal in the inserting direction. As a result, the cutting tool holder H is aligned along the alignment axis A.

At this time, the gap between the magnet 171 and the cutting tool holder H can be adjusted as the moving part 177 is moved relative to the base part 176. To this end, the user may insert a driver into the driver groove 177c and rotate the driver to rotate the moving part 177. [

In this case, the moving part 177 (and the magnet 171) can be moved in the axial direction of the cutting tool holder 176 by screwing the male thread 177a of the moving part 177 to the female thread 176c of the base part 176. [ (H) and away from it.

Further, when foreign substances such as dust are accumulated in the inner space of the base portion 176, compressed air can be discharged to the outside through the discharge hole 176d to remove the foreign matter.

In order to confirm the alignment effect of the run-out tester 100 with respect to the existing tester, experimental results will be described with reference to FIG.

FIG. 4 is a photograph showing a comparative experiment of the degree of alignment of the holder with respect to the run-out tester 100 according to an embodiment of the present invention and another tester.

First, the embodiment has the technical features by the alignment unit 170 described above, and the comparative example does not have such a technical feature.

Table 1 shows the experimental results for cutting tool holders accommodating the cutting tool according to ISO25, Table 2, ISO20 and Table 3 according to ISO15 standard. Here, ISO25 and the like refer to a standard for the cutting tool shank portion defined by ISO.

As shown in FIG. 4, a force of a predetermined magnitude such as 0.1 kgf or 0.2 kgf is applied perpendicularly to the longitudinal direction of the cutting tool using a push gauge, and the cutting tool is moved in the vertical direction (Displaced) is measured using an indicator. At this time, the distance from the upper surface of the body 110 to the push gauge is 140 mm for ISO 25, 100 mm for ISO 20, and 95 mm for ISO 15.

division Clearance [㎛] Power [kgf] Example Comparative Example 0.1 2 5 0.2 4 10 0.3 5 15 0.4 7 100 or more 0.5 13

division Clearance [㎛] Power [kgf] Example Comparative Example 0.1 3 15 0.2 6 100 or more 0.3 8 0.4 12 0.5 16

division Clearance [㎛] Power [kgf] Example Comparative Example 0.1 3 10 0.15 5 100 or more 0.2 10 0.25 15 0.3 25

As can be seen in Tables 1 to 3, when the same magnitude of force is applied, it can be seen that the embodiment permits only a small amount of jungling less than 1 min. According to the present invention, it is possible to perform a more precise run-out experiment in a state in which the small diameter cutting tool holder is accurately aligned along the alignment axis.

The run-out tester for such a small-diameter cutting tool holder is not limited to the configuration and operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: Run-out tester for small diameter tool holder
110: body 111: first side
112: second side 115: receiving hole
130: Cradle 150: Retainer
170: alignment unit 171: magnet
175: housing 176: base portion
177:

Claims (7)

A body having a receiving hole and a first surface which is a surface of the cutting tool holder approaching the receiving hole and a second surface opposite to the first surface;
A tube chain retainer inserted in the receiving hole to receive the cutting tool holder and having an inner diameter on the first surface side larger than an inner diameter on the second surface side corresponding to an outline of the cutting tool holder; And
The cutting tool holder is mounted on the second surface of the body so as to correspond to the cutting tool holder and deflects the cutting tool holder received in the retainer in the inserting direction toward the second surface from the first surface, And an alignment unit for aligning the body along an alignment axis of the body,
The alignment unit includes: a magnet for applying a magnetic attractive force to the cutting tool holder; And a housing for receiving the magnet,
The housing includes: a base portion coupled to the second surface; And a moving part on which the magnet is seated and movably installed on the base part,
The run-out tester for a small-diameter cutting tool holder according to claim 1, wherein the base portion includes a hollow body having a discharge hole that is opened to the outside and allows foreign substances to be discharged to the outside.
The method according to claim 1,
Wherein the magnet applies the magnetic attraction force along the insertion direction to the cutting tool holder.
delete The method according to claim 1,
The moving unit includes:
And a run-out tester for a small-diameter cutting tool holder movably mounted on the base portion toward the cutting tool holder.
The method according to claim 1,
In the hollow body,
A female screw is formed on the inner circumference,
The moving unit includes:
A run-out tester for a small-diameter toolholder, the cylindrical chain having a male thread formed on the outer circumferential surface thereof and screwed to the female thread.
6. The method of claim 5,
In the cylindrical body,
A seating groove on which the magnet is seated; And
And a driver groove formed on the opposite side of the seating groove.
delete

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