JP3174626U - Tool holding device - Google Patents

Abstract

To provide a tool holding device that can increase the degree of freedom of design for suppressing the occurrence of runout and suppress the occurrence of a problem that a large number of shanks that are relatively large precision parts must be prepared. .
A shank S is constituted by a shank body 1 and a tool holding member 2 until a contact surface 21 comes into close contact with a locking surface 12 in a state in which a convex inlay portion 131 is fitted to a concave inlay portion 221. The tool holding device H is configured such that the male screw portion 132 is screwed into the female screw portion 222 and the tool holding member 2 is attached to the shank body 1 to constitute the shank S.
[Selection] Figure 2

Description

  The present invention relates to a tool holding device that is detachably attached to a machine tool.

  Conventionally, as this type of tool holding device, for example, a shank having a tapered surface that is detachably fitted to a spindle of a machine tool, and a holder that holds various tools and tools provided on the outer end side of the shank. It is known that a collet chuck for detachably attaching and a pull stud provided on the inner end side of the shank for fixing the shank to the spindle (for example, Patent Document 1). reference).

  However, the following problems are pointed out in such a tool holding device.

  That is, when the tool is held directly or indirectly by the collet chuck, there is a limit to its grasping force. In order to solve such problems, it is desirable to fix the tool directly to the shank. However, since the conventional shank is an integral component, it is necessary to prepare each shank, which is a large precision component, corresponding to each tool. Not realistic.

  Also, a chuck such as a collet chuck has a dimensional defense range and may require a different shape depending on the type of tool. Therefore, in order to be able to load various tools into the machine tool, it is necessary to prepare many chucks having different sizes and shapes. As a result, there is a need for a tool holding device in which various chucks are provided on the shank. From this point of view, many shanks, which are large precision parts, are required.

  Some holders for holding a tool are detachably attached to the shank via a chuck so as to take into account the above-described inconvenience, that is, the need for a large number of shanks. However, this also has a limit in sufficiently suppressing the occurrence of runout caused by the above-described collet chuck.

JP 2009-45716 A

  The present invention has been made paying attention to such a problem, and can increase the degree of freedom of design for suppressing the occurrence of runout, and in addition, it can be compared with many tools. An object of the present invention is to provide a tool holding device capable of suppressing the occurrence of a problem that a large number of shanks, which are large precision components, must be prepared.

  That is, the tool holding device of the present invention has the following configuration.

  The tool holding device according to claim 1, comprising a shank that is detachably attached to a spindle of a machine tool, wherein the shank has a tapered surface that fits into the spindle. A main body and a tool holding member that is detachably attached to the shank main body, and the shank main body is provided with a locking surface orthogonal to the axis and protruding from the locking surface. A projecting shaft portion having an outer peripheral surface whose axial center coincides with the shaft center of the shank, a convex inlay portion provided on the outer peripheral surface of the projecting shaft portion, and the outer peripheral surface adjacent to the convex inlay portion The tool holding member is provided with a contact surface orthogonal to the shaft center and a recess recessed from the contact surface, the shaft center being the shaft center of the shank. Concave with matched inner circumference A recessed inlay portion provided in the recessed portion, and a female screw portion provided in the inner peripheral surface adjacent to the recessed inlay portion, wherein the protruding inlay portion is the recessed inlay portion. The shank is configured by screwing the male screw portion into the female screw portion until the abutment surface is in close contact with the locking surface in a state where the tool holding member is fitted to the shank body. Is.

  According to a second aspect of the present invention, in the configuration according to the first aspect, the male screw portion is provided closer to the shaft tip side than the convex inlay portion on the outer peripheral surface of the protruding shaft portion, and the female screw The portion is provided on the far end side with respect to the recessed spigot portion on the inner peripheral surface of the recessed portion.

  According to a third aspect of the present invention, there is provided the tool holding device according to the first or second aspect, wherein the tool holding member includes a tool attachment portion for attaching a tool.

  According to a fourth aspect of the present invention, there is provided the tool holding device according to the third aspect, wherein the tool mounting portion is an extension portion for deep feeding, to which a tool is integrally mounted via a weld joint.

According to a fifth aspect of the present invention, in the configuration according to the third aspect, the tool attachment portion is an extension portion for providing a chuck for holding the tool.
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  The tool holding device according to claim 6, comprising a shank that is detachably mounted on a spindle of a machine tool, wherein the shank has a tapered surface that fits into the spindle. A main body and a tool holding member that is detachably attached to the shank main body, and the shank main body is provided with a locking surface orthogonal to the axis and protruding from the locking surface. A projecting shaft portion having an outer peripheral surface whose axial center coincides with the shaft center of the shank; and a male screw portion provided on the outer peripheral surface of the projecting shaft portion. An abutting surface orthogonal to the abutting surface, a recessed portion having an inner peripheral surface that is provided to be recessed from the abutting surface and whose axial center coincides with the axial center of the shank, and an inner peripheral surface of the recessed portion. With a female threaded part Wherein the abutment surface is constituted of said shank and mounting the tool holding member to the shank body is screwed to the male screw portion into the female screw portion to be in close contact with the locking surface.

  As described above, according to the present invention, not only can the degree of freedom of design for suppressing the occurrence of runout be increased, but also a relatively large precision component that can be used for many tools. The occurrence of a problem that a large number of shanks must be prepared is suitably suppressed.

The perspective view which shows one Embodiment of this invention. The side view which shows the same embodiment. The side view which shows the shank main body in the embodiment. The side view which shows the tool holding member in the embodiment. The side view which shows schematically the tool holding member which is other embodiment. The side view which shows schematically the tool holding member which is other embodiment. The side view which shows schematically the tool holding member which is other embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a tool holding device H that holds a deep-feeding tool K.

  The tool holding device H is mainly composed of a shank S that is detachably mounted on the spindle M1 of the machine tool M. In order to attach the deep-feeding tool K to the outer end of the shank S. And a pull stud P for fixing the shank S to the spindle M1 is provided at the inner end of the shank S.

  Here, “inward end” means an end toward the machine tool M, that is, an end closer to the machine tool M, and “outward end” means a side away from the machine tool M, that is, from the machine tool M. It means the end on the far side.

  The shank S includes a shank main body 1 having a tapered surface 11 fitted to the spindle M1, and a tool holding member 2 detachably attached to the shank main body 1.

  More specifically, the shank body 1 has a locking surface 12 orthogonal to the shaft center and an outer peripheral surface g provided so as to protrude from the locking surface 12 and having the shaft center aligned with the shaft center of the shank S. A projecting shaft portion 13 having a convex inlay portion 131 provided on the outer peripheral surface g of the projecting shaft portion 13, and a male screw portion 132 provided on the outer peripheral surface g adjacent to the convex inlay portion 131. It is provided. Specifically, the shank body 1 has a truncated cone shape and includes an inner flange portion 14 and an outer flange portion 15 on the outer end side thereof. The inner collar portion 14 and the outer collar portion 15 are provided adjacent to each other, and the outer collar portion 15 is located closer to the tool holding member 2 than the inner collar portion 14, and the inner collar portion 14 is more than the outer collar portion 15. Located on the machine tool M side. The inner collar portion 14 is formed with a key groove 141 for preventing idling that engages with a locking projection M2 provided on the machine tool M. Further, the locking surface 12 is formed in an annular shape at the outer end of the outer flange portion 15, and the protruding shaft portion 13 is integrally provided inside the locking surface 12, that is, on the axial center side. . The male screw portion 132 is provided on the shaft tip side with respect to the convex inlay portion 131 on the outer peripheral surface g of the protruding shaft portion 13. Accordingly, the outer diameter of the convex inlay portion 131 is set to be slightly larger than the outer diameter of the male screw portion 132. A pull stud mounting portion for mounting the pull stud P is provided at the inner end of the shank body 1, and since this pull stud mounting portion is a normal one, illustration and detailed description thereof are omitted.

  The tool holding member 2 is provided with a contact surface 21 orthogonal to the shaft center, and a recessed portion having an inner peripheral surface h provided so as to be recessed from the contact surface 21 and having the shaft center aligned with the shaft center of the shank S. 22, a recessed inlay part 221 provided in the recessed part 22, and a female screw part 222 provided on the inner peripheral surface h adjacent to the recessed inlay part 221. Specifically, the tool holding member 2 is a bowl-shaped member that holds the projecting shaft portion 13 of the shank body 1, and the contact surface 21 is formed in an annular shape on the base end side. The recessed portion 22 is integrally formed inward from the contact surface 21, that is, on the axial center side. The female screw part 222 is provided on the inner end surface h of the recessed part 22 on the far end side than the recessed inlay part 221. Thus, the inner diameter of the recessed inlay portion 221 is set slightly larger than the inner diameter of the female screw portion 222. A tool mounting portion 23 is integrally provided on the tip side of the tool holding member 2. The tool mounting portion 23 is a rod-like extension portion that gradually decreases in diameter toward the tip, and a deep-feeding tool K is fixed to the tip via a welding joint t.

  The shank S is configured by mounting the tool holding member 2 on the shank body 1 configured as described above. That is, as shown in FIGS. 1 and 2, the male threaded portion 132 is moved until the contact surface 21 comes into close contact with the locking surface 12 in a state where the convex inlay portion 131 is fitted to the concave inlay portion 221. The shank S is configured by screwing into the female threaded portion 222 and mounting the tool holding member 2 on the shank body 1. In addition, it is preferable to set the fitting in the fitting state of the convex inlay portion 131 and the concave inlay portion 221 to about H7 (221) and g6 (131). Further, it is desirable that the engagement between the male screw portion 132 and the female screw portion 222 is set to be equivalent to a JIS Class 1 fine screw for both the male screw and the female screw.

  Thus, in the case of the tool holding device H according to the present embodiment, the shank S is constituted by the shank body 1 and the tool holding member 2 that is detachably provided on the shank body 1. By making the tool holding member 2 compatible with various tools K after making them common, various tools K can be held. In addition, if the coupling structure between the shank body 1 and the tool holding member 2 is as described above, the tool holding member 2 can be easily removed and replaced with respect to the shank body 1 and accurately. It becomes possible to reassemble.

  In addition, in such a case, when the tool holding member 2 is assembled to the shank body 1, the locking surface 12 and the abutting surface 12 are brought into contact with each other while the axial centers of the shank body 1 and the tool holding member 2 are accurately aligned. The contact surface 21 comes into close contact. Therefore, even though the shank S is divided into the shank body 1 and the tool holding member 2, it is possible to exhibit performance not inferior to that of the integrated shank in use.

  With the tool holding device H shown in this embodiment, the deep-feeding tool K can be supported by the shank S without going through the collect chuck, and high-precision machining without runout can be achieved. In addition, if a plurality of types of tool holding members 2 holding various tools K are prepared, the shank body 1 can be used in common, and various processing can be flexibly handled.

  Note that the present invention is not limited to the embodiment described in detail above, and any device may be used as long as various tools can be directly or indirectly held by the tool holding member. Hereinafter, other embodiments will be described, but the same or corresponding components as those of the above-described embodiments will be denoted by the same reference numerals and description thereof will be omitted.

  FIG. 5 shows the case where the tool mounting portion 5 is an extending portion for providing a chuck 51 for holding a tool. That is, in this embodiment, the tool K can be indirectly held on the distal end side of the extending portion 5 of the tool holding member 2 via the collect chuck C. Specifically, the collect chuck C has a tapered hole 52 provided in the inner periphery of the extension portion 5, a chuck 51 mounted in the tapered hole 52, and press-fits the chuck 51 into the tapered hole 52. And the nut 53 is attached to a male screw portion m1 formed on the outer periphery of the extension portion 5 so as to be able to be screwed back and forth. With such a configuration, the runout is less than when a holder for holding a tool is attached to the shank via the first collect chuck. It becomes possible to suppress it reliably.

  FIG. 6 shows a case where the tool attachment portion 6 is an extension portion 6 for providing a chuck D for holding the tool K. That is, in this embodiment, the tool K can be indirectly held on the distal end side of the extending portion 6 of the tool holding member 2 via the drill chuck D. Specifically, the drill chuck D is screwed into a male screw 61 projecting from the tip of the extension portion 5, and the configuration of the drill chuck D itself is the same as the conventional one. Is omitted. With such a configuration, the runout is more reliable than the conventional case where a holder having a drill chuck is attached to the shank via a collect chuck, and the drill chuck is held by this drill chuck. Can be suppressed.

  FIG. 7 shows the case where the tool attachment portion 7 is an extension portion for constituting the milling arbor F. That is, in this embodiment, a milling arbor F that holds a milling blade 71 that is a tool K is provided on the distal end side of the extending portion 7 of the tool holding member 2. Specifically, the milling arbor F is provided at the tip of the extending portion 7 and receives a milling blade 71 and a shaft hole 711 of the milling blade 71 projecting from the center of the collar 72. A driving shaft portion 73 that is integrally held, and a clamp bolt 74 that is screwed to the tip of the driving shaft portion 73 and prevents the milling blade 71 from being detached from the driving shaft portion 73 are provided. With such a configuration, it is possible to surely suppress runout as compared with the conventional case where the milling arbor is held by the shank via the collect chuck.

  In addition to those shown in the other embodiments described above, various connection modes between the tool and the tool holding member can be considered. For example, if the tool and the tool holding member are baked, May be connected.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Shank main body 2 ... Tool holding member 12 ... Locking surface 13 ... Projection shaft part 21 ... Contact surface 22 ... Recessed part 23 ... Tool attachment part 131 ... Convex inlay part 132 ... Male thread part 221 ... Concave inlay part 222 ... Female thread part K ... Tool M ... Machine tool M1 ... Spindle H ... Tool holder

Claims (6)

A tool holding device comprising a shank that is detachably attached to a spindle of a machine tool,
The shank comprises a shank body having a tapered surface that fits to the spindle, and a tool holding member that is detachably attached to the shank body,
The shank body has a locking surface orthogonal to the shaft center, a protruding shaft portion having an outer peripheral surface provided so as to protrude from the locking surface and having the shaft center aligned with the shaft center of the shank, and the protruding shaft A convex inlay portion provided on the outer peripheral surface of the portion, and a male screw portion provided on the outer peripheral surface adjacent to the convex inlay portion,
The tool holding member has a contact surface orthogonal to the shaft center, a recessed portion provided with a recess from the contact surface, and an inner peripheral surface having the shaft center aligned with the shaft center of the shank, and the recess. A recessed inlay portion provided in the portion, and a female screw portion provided on the inner peripheral surface adjacent to the recessed inlay portion,
With the convex inlay part fitted into the concave inlay part, the male threaded part is screwed into the female threaded part until the contact surface comes into close contact with the locking surface, and the tool holding member is attached to the shank body. A tool holding device for machine tools, characterized in that the shank is mounted. The male screw portion is provided closer to the shaft tip side than the convex inlay portion on the outer peripheral surface of the protruding shaft portion, and the female screw portion is on the far end side than the concave inlay portion on the inner peripheral surface of the recessed portion. The tool holding device for machine tools according to claim 1, which is provided on the machine tool. The tool holding device for a machine tool according to claim 1 or 2, wherein the tool holding member includes a tool mounting portion for mounting a tool. The tool holding device for a machine tool according to claim 3, wherein the tool attachment portion is an extended portion for deep feeding to which the tool is integrally attached via a weld joint. The tool holding device for a machine tool according to claim 3, wherein the tool mounting portion is an extending portion for providing a chuck for holding a tool. A tool holding device comprising a shank that is detachably attached to a spindle of a machine tool,
The shank comprises a shank body having a tapered surface that fits to the spindle, and a tool holding member that is detachably attached to the shank body,
The shank body has a locking surface orthogonal to the shaft center, a protruding shaft portion having an outer peripheral surface provided so as to protrude from the locking surface and having the shaft center aligned with the shaft center of the shank, and the protruding shaft And a male screw portion provided on the outer peripheral surface of the portion,
The tool holding member has a contact surface orthogonal to the shaft center, a recessed portion provided with a recess from the contact surface, and an inner peripheral surface having the shaft center aligned with the shaft center of the shank, and the recess. And an internal thread portion provided on the inner peripheral surface of the portion,
For the machine tool, the shank is configured by screwing the male screw portion into the female screw portion until the contact surface comes into close contact with the locking surface and mounting the tool holding member on the shank body. Tool holding device.

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