JP3998082B2 - Tool holder storage device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool holder storage device for storing a tool holder shank portion in a machine tool automatic tool changer. More specifically, in the machine tool automatic tool changer, so-called, relates to a tool holder housing unit for housing the Sandvik type toolholder shank.
[0002]
[Prior art]
In a machine tool automatic tool changer, a tool that is not necessary for a desired machining operation is a tool pot (registered trademark of Hudo Co., Ltd., a tool holder storage tool: hereinafter referred to simply as a tool pot) through a tool holder. .) is held, more particularly, is held by paying shank portion of the tool holder (the handle portion) to the shank portion receiving hole of the tool holder storage equipment, and waits until the required, is required It is taken out and used as appropriate during processing operations.
[0003]
Conventionally, in a machine tool automatic tool changer, a sandvik type tool holder shank portion has a shape shown in FIGS. FIG. 7 is a perspective view of the shank portion of the tool holder, and FIG. 8 is a front view of the shank portion. FIG. 9 is a front view of a conventional tool pot having a shank portion accommodation hole shape corresponding to a sandvik type tool holder shank portion.
[0004]
As can be seen from these figures, the shank portion 21 of the tool holder A ′ has a substantially triangular shape in cross section perpendicular to the axial direction, and its three sides are not straight lines but curved lines. Each corner also has a curved structure. A hole 22 is formed in the end surface of the shank portion 21 in the tool pot storage direction. This hole 22 is fitted with the insert part 24 projected from the bottom surface of the shank part accommodation hole 23 of the tool pot B ′ and holds the shank part 21.
[0005]
The shank portion accommodation hole 23 of the tool pot B ′ also has a substantially triangular cross-sectional shape perpendicular to its depth direction, and its side is a curved line having an appropriate bulge, and each vertex is also curved. That is, the shank portion accommodation hole 23 of the tool pot B ′ has the same shape as the outer shape of the shank portion 21 of the tool holder A ′.
Therefore, the shank portion 21 of the tool holder A ′ is slid into the shank portion receiving hole 23 of the tool pot B ′, that is, the shank portion 21 of the tool holder A ′ is placed on the peripheral surface of the shank portion receiving hole 23 of the tool pot. Stored and held in surface contact.
[0006]
[Problems to be solved by the invention]
In the tool pot B ′ that holds the tool holder A ′ by such a method, the shank portion accommodation hole 23 is required to have extremely high dimensional accuracy so that the tool holder A ′ is not easily held and does not rattle. . For this purpose, the shape of the shank portion receiving hole 23 of the tool holder A ′ is matched with the shape (outer shape) of the shank portion 21 of the tool holder A ′ with very high accuracy, that is, the peripheral surfaces of both are in complete contact. It is essential to finish as you do.
[0007]
By the way, a tool pot for storing tools in an automatic tool changer for machine tools has recently been frequently used from a reinforced synthetic resin composite material in terms of productivity and cost. However, when manufacturing a tool pot using the reinforced synthetic resin composite material as described above, it goes without saying that the shank portion accommodation hole 23 of the tool holder A ′ can be finished with high accuracy so as to be the same as the outer shape of the shank portion 21. In addition, not only a great deal of labor is required, but also some molding shrinkage and the like that occur during the production of the molding process are difficult and extremely difficult at present.
[0008]
Therefore, the problem to be solved by the present invention is that the shank part of the tool holder can be securely held, and the labor and manufacturing cost put into the manufacturing work of the tool holder storage tool can be reduced, and productivity can be reduced. An object is to provide an excellent tool holder storage device , in particular, a tool holder storage device compatible with the Sandvik type.
[0009]
[Means for Solving the Problems]
The above problem is a tool holder storage device in a machine tool automatic tool changer ,
The tool holder storage device comprises a tool holder provided with a tool holder shank part, and a tool holder storage tool in which a tool holder shank part storage hole for storing the tool holder shank part is formed,
The tool holder shank storage hole of the tool holder storage tool is
In the cross section in the direction perpendicular to the depth direction of the hole, the inner shape of the hole and the outer shape of the tool holder shank portion are configured to be different shapes,
And, when the tool holder shank portion is stored in the hole, the hole and the tool holder shank portion are configured in a shape in line contact in the depth direction of the hole,
Furthermore, the line contact is solved by a tool holder storage device characterized in that it is formed in a shape that exists at three or more locations .
[0011]
In the present invention configured as described above , the cross-sectional shape perpendicular to the axial direction of the shank portion of the shank portion receiving hole of the tool holder is different from the outer shape of the cross-sectional shape of the shank portion, and the periphery of the shank portion receiving hole is Since the surface is in line contact with the shank portion of the tool holder at least at three or more locations, the holding state of the shank portion is reliable.
[0012]
By doing in this way, it is not necessary to make the shape of the shank portion accommodation hole coincide with the outer shape of the shank portion with high accuracy and finish the two peripheral surfaces completely in contact. Therefore, it is excellent in productivity, and as a result , the labor and manufacturing cost put into the manufacturing work of the tool holder storage tool can be greatly reduced. In the tool holder storage tool described above, the shape of the cross section perpendicular to the depth direction of the shank portion storage hole is an arc-shaped curve at the apex side, and each side is configured by a straight line. It can be triangular.
[0013]
Alternatively, the cross-sectional shape perpendicular to the depth direction of the shank portion accommodation hole is a substantially hexagonal shape in which the apex side portion is an arc-shaped curve, and each side is a straight line, and the shank portion accommodation hole These peripheral surfaces may have different types of surfaces having different lengths along the circumferential direction of the shank portion accommodation hole. In particular, the shape of the cross section perpendicular to the depth direction of the shank portion accommodation hole is a substantially hexagonal shape in which the apex side portion is an arcuate curve and each side is constituted by a straight line, and the shank portion accommodation hole The circumferential surface of the shank portion storage hole may be constituted by alternately connecting two types of unit surfaces having different lengths along the circumferential direction of the shank portion storage hole along the circumferential direction of the shank portion storage hole. it can.
[0014]
In addition, the positioning protrusion part which fits with the groove part for positioning provided in the tool holder shank part can be formed in the surrounding surface of a tool holder shank part accommodation hole.
Moreover, the taper which opens toward the opening side can be provided in the surrounding surface of a tool holder shank part accommodation hole corresponding to the shape (outside shape) of a tool holder shank part.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the tool holder storage tool of the tool holder storage device described as the first embodiment of the present invention has a cross-sectional shape orthogonal to the depth direction in the tool holder shank part storage hole, and the axis of the tool holder shank part. The tool holder shank has a shape that is not similar to the cross-sectional shape (outer shape) perpendicular to the direction, and the peripheral surface of the tool holder shank housing hole is in line contact with the shank of the tool holder at least at three locations simultaneously. It is characterized by comprising a storage hole.
[0016]
In particular, in the present embodiment, the shape of the cross section perpendicular to the depth direction in the tool holder shank portion accommodation hole, the apex side portion forms an arcuate curve, and each side is a substantially triangular shape composed of straight lines. Shall. In addition, a positioning projection that fits into a positioning groove provided in the shank portion of the tool holder is formed on the peripheral surface of the tool holder shank portion accommodation hole. Furthermore, a slight taper that opens toward the opening side is formed on the peripheral surface of the tool holder shank portion accommodation hole.
[0017]
Next, the first embodiment of the present invention will be described in more detail with reference to FIGS. Incidentally, FIG. 1 is an external view of the tool holder storage equipment of the tool holder housing device of the present embodiment, FIG. 2 is a longitudinal sectional view of the tool holder housing member, FIG. 3 is a front view of the tool holder storage equipment, 4 it is a cross-sectional view in a state accommodating the shank portion of the tool holder shank portion receiving hole of the tool holder accommodation tool. The tool holder storage device of the present embodiment is made of a reinforced synthetic resin composite material, and has, for example, a cylindrical outer shape whose one end side is discontinuously enlarged in diameter with respect to the remaining portion. . A tool holder shank portion accommodation hole (hereinafter simply referred to as a shank portion accommodation hole) 1 for accommodating the shank portion of the tool holder is formed on the enlarged diameter side.
[0018]
The depth of the shank portion accommodation hole 1 is equal to the shank portion dimension of the tool holder to be held. Further, as can be seen from FIG. 2, the insert portion 2 is projected into the shank portion accommodation hole 1. This insert part 2 fits into the hole which exists in the shank part end surface of a tool holder.
In the tool pot, the cross-sectional shape perpendicular to the depth direction in the shank portion accommodation hole 1 is not similar to the cross-sectional shape perpendicular to the axial direction in the shank portion of the tool holder. In other words, as can be seen from FIG. 3, the cross section of the shank portion accommodation hole 1 is formed only by the apex-side portion with an arcuate curve. In other words, the three arcuate curves are represented by three straight lines. It has a substantially triangular shape connected in a ring shape. And with this, in this embodiment, as shown in FIG. 4, the peripheral surface of the shank part accommodation hole 1 is point-contacted with the shank part A of a tool holder at three places simultaneously (the depth direction of the shank part accommodation hole 1). The shank portion accommodation hole 1 is configured so as to make a line contact if viewed.
[0019]
Furthermore, a slight taper that opens toward the opening side is formed on the peripheral surface of the shank portion accommodation hole 1. That is, the cross-sectional area of the shank portion accommodation hole 1 is larger toward the opening side. And in this embodiment, the positioning projection part 3 is formed in the surrounding surface of the shank part accommodation hole 1. As shown in FIG. As can be seen from FIG. 4, the positioning protrusion 3 is fitted with a positioning groove provided in the shank portion A of the tool holder. When the shank portion A of the tool holder is stored in the tool pot, Play the role of matching.
[0020]
Since the tool pot of the present embodiment is configured as described above, the shank portion is configured such that the circumferential surface of the shank portion accommodation hole 1 is in point contact or line contact with the shank portion A of the tool holder at three locations simultaneously. Hold A.
Subsequently, a second embodiment of the present invention will be described.
Also in the tool pot of this embodiment, a shank portion accommodation hole for accommodating the shank portion of the tool holder is formed, and the shape of the cross section of the shank portion accommodation hole perpendicular to the depth direction is defined as a tool. The shape of the cross section (outer shape) perpendicular to the axial direction of the holder shank is not similar, and the peripheral surface of the shank housing hole is point contact or line contact with the shank of the tool holder at 6 locations simultaneously. The shank part accommodation hole is comprised so that it may do. In particular, in this tool pot, the shape of the cross-section perpendicular to the depth direction in the shank portion accommodation hole is a substantially hexagonal shape in which the apex side portion is an arc-shaped curve and each side is constituted by a straight line. Yes, and the peripheral surface of the shank portion storage hole is formed by alternately connecting two types of unit surfaces having different lengths along the circumferential direction of the shank portion storage hole along the circumferential direction of the shank portion storage hole. ing.
[0021]
Hereinafter, this embodiment will be described in more detail with reference to FIGS. 5 and 6. FIG. 5 is a front view of the tool pot of the second embodiment, and FIG. 6 is a sectional view of the tool pot with the shank portion of the tool holder housed in the shank portion housing hole of the tool pot.
The tool pot of the present embodiment also has a cylindrical outer shape in which one end side is discontinuously increased in diameter with respect to the remaining portion, and the shank portion of the tool holder is provided on the increased diameter side. The shank part accommodation hole 11 which accommodates is formed. An insert portion 12 projects into the shank portion accommodation hole 11. Further, a positioning projection 13 is formed on the peripheral surface of the shank housing hole 11.
[0022]
Now, also in the tool pot of this embodiment, the cross-sectional shape orthogonal to the depth direction in the shank portion accommodation hole 11 is not similar to the cross-sectional shape (outer shape) orthogonal to the axial direction in the shank portion of the tool holder. It has a shape. That is, as can be seen from FIG. 5, the shape of the cross section of the shank housing hole 11 is such that only the apex-side portion has an arcuate curve and each side is constituted by a straight line, in other words, six arcuate shapes. It has a substantially hexagonal shape in which the curves are similarly connected in a ring with six straight lines. And with this, in this embodiment, as shown in FIG. 6, the peripheral surface of the shank part accommodation hole 11 is a point contact with the shank part C of a tool holder at six places simultaneously (in the depth direction of the shank part accommodation hole 11). The shank portion accommodation hole 11 is configured to make a line contact if viewed.
[0023]
In the second embodiment, the cross section of the shank portion accommodation hole 11 is not a regular hexagon. That is, the peripheral surface of the shank housing hole 11 is composed of six unit surfaces, and there are two types of unit surfaces. One is a large unit surface (portion indicated by X in FIG. 5) having a large length along the circumferential direction of the shank portion accommodation hole 11, and the other is also in the circumferential direction of the shank portion accommodation hole 11. It is a small unit surface (portion indicated by Y in FIG. 5) having a small length along. And these unit surfaces are connected along the circumferential direction of the shank part accommodation hole 11 so that different types of ones may be alternately positioned. As a result, the cross section of the shank portion accommodation hole 11 forms an irregular hexagon as shown in FIGS.
[0024]
Even in the tool pot of the present embodiment, the same effects as those of the first embodiment described above are obtained, but in particular, the peripheral surface of the shank portion storage hole 11 is formed on the shank portion C of the tool holder as compared with the first embodiment. On the other hand, since the contact is made at twice the location, a more reliable holding state can be obtained and the stability is further improved.
Here, as a representative embodiment of the present invention, a case where the shank portion accommodation hole has a substantially triangular or substantially hexagonal cross section is taken as an example. However, of course, the present invention is not limited to this, and any shape other than the shape mentioned as the embodiment above may be used as long as it is in point contact or line contact with the shank portion of the tool holder at three or more locations. It may be a thing.
[0025]
【The invention's effect】
According to the present invention , it is possible to reliably hold the shank portion of the tool holder, and dimensional accuracy can be obtained relatively easily during manufacturing, reducing labor and manufacturing cost for manufacturing operations. it can.
[Brief description of the drawings]
Becomes [1] longitudinal section of a first external view of a tool holder accommodation tool of the tool holder housing apparatus according to the embodiment [2] the tool holder housing member comprising a first embodiment [3] First Embodiment made in the sectional view Figure 5 a second embodiment in a state accommodating the shank portion of the tool holder shank portion receiving hole of the front view [FIG. 4] tool holder storing tool comprising a first embodiment of the tool holder housing member Front view of the tool holder storage tool [FIG. 6] Cross-sectional view of the tool holder storage tool in the second embodiment with the shank part of the tool holder stored in the shank storage hole [FIG. 7] Perspective view of the tool holder shank part [Fig. 8] Front view of tool holder shank [Fig. 9] Front view of conventional tool holder housing with shank housing hole shape corresponding to Sandvik type tool holder shank [Explanation of symbols]
A, C Tool holder shank portion 1, 11 Tool holder shank portion receiving hole 2, 12 Insert portion 3, 13 Positioning projection X Large unit surface constituting the peripheral surface of the shank portion receiving hole Y Perimeter surface of the shank portion receiving hole Small unit planes that compose

Claims (5)

A tool holder storage device in a machine tool automatic tool changer ,
The tool holder storage device comprises a tool holder provided with a tool holder shank part, and a tool holder storage tool in which a tool holder shank part storage hole for storing the tool holder shank part is formed,
The tool holder shank storage hole of the tool holder storage tool is
In the cross section in the direction perpendicular to the depth direction of the hole, the inner shape of the hole and the outer shape of the tool holder shank portion are configured to be different shapes,
And, when the tool holder shank portion is stored in the hole, the hole and the tool holder shank portion are configured in a shape in line contact in the depth direction of the hole,
The tool holder storage device according to claim 1, wherein the line contact is formed in a shape that exists at three or more locations . The tool holder shank storage hole is
An inner shape in a cross section in a direction perpendicular to the depth direction of the hole is formed in a substantially triangular shape in which the apex side portion forms an arcuate curve and each side is formed by a straight line. The tool holder storage device according to claim 1 . The tool holder shank storage hole is
The inner shape of the cross-section in the direction perpendicular to the depth direction of the hole has a substantially hexagonal shape in which the apex side portion has an arc-like curve and each side is constituted by a straight line, and a non-regular hexagonal shape. It is formed by <br/> that the tool holder housing unit according to claim 1, characterized in. The tool holder shank storage hole is
The tool holder storage device according to any one of claims 1 to 3, wherein a taper that opens toward the opening side of the hole is formed . The tool holder shank portion is provided with a positioning groove, and the tool holder shank portion receiving hole is provided with a positioning protrusion that fits into the positioning groove. The tool holder storage device according to any one of claims 1 to 4 .

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