JP5295728B2 - Machining tool fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining tool fixture surely attaching a machining tool onto a tool attachment portion with simple work. <P>SOLUTION: The machining tool fixture includes: a fixing member 38 for fixing the machining tool 36 to the tool attachment portion 35; and a pressure tool 40 for pressing the fixing member 38 against the machining tool 36. The pressure tool 40 includes first and second pressure members 42, 44 and a fixing screw 46 for moving the first and second pressure members 42, 44 in approaching and separating directions. The fixing screw 36 is screwed into the second pressure member 44 through the first pressure member 42. When the fixing screw 46 is rotated in the tightening direction, the first and second pressure members 42, 44 are moved in the direction approaching each other. The fixing member 36 works on the machining tool 36 through tapered surfaces 58, 64 of the first and second pressure members 42, 44 and tapered surfaces 54, 56 of the fixing member 38, and the machining tool 36 is pressed and fixed by the fixing member 36. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a processing tool attachment that removably attaches a processing tool to a tool attachment portion such as a turret lathe.

  For example, in an NC lathe, a cutting tool as a processing tool is used when cutting, and this cutting tool is attached to a tool attachment part, for example, a tool attachment part of a turret. A base is mounted on the lathe body so as to be movable in the Z-axis direction. A turret body is mounted on the base so as to be movable in the X-axis direction, and a turret is provided on the turret body. A tool mounting portion is provided at intervals in the direction (see, for example, Patent Document 1).

  A processing tool attachment for attaching a processing tool (for example, a cutting tool) to the tool attachment portion includes a base member and a fixing screw screwed to the base member, and the fixing screw is attached to the base member. Arranged at intervals. When attaching the processing tool, the fixing screw acts on the processing tool by tightening the fixing screw, and the fixing tool is detachably attached by the fixing screw.

Japanese Patent Laid-Open No. 10-31514

  However, the above-described processing tool fixture has the following problems to be solved. That is, in order to fix the machining tool, for example, two fixing screws must be tightened, and the fixing work is complicated. Further, in order to securely fix the processing tool, these fixing screws must be uniformly tightened, and the tightening adjustment is complicated.

  An object of the present invention is to provide a machining tool attachment that can reliably attach a machining tool to a tool attachment portion with a simple operation.

The processing tool attachment according to claim 1 of the present invention is a processing tool attachment for detachably attaching a processing tool to a tool attachment portion of a machine tool,
A fixing member for fixing the processing tool to the tool mounting portion, and a pressing tool for pressing the fixing member against the processing tool,
The pressing tool is fixed for moving the first and second pressing members, which are movably arranged in directions approaching and separating from each other, and the first and second pressing members in directions approaching and separating from each other. A first taper surface that is inclined toward the fixing member toward the outside and provided on one side of the first pressing member, and on the one surface of the second pressing member toward the outside. A second tapered surface inclined toward the fixing member side is provided;
The fixing screw has a head portion and a shaft portion extending from the head portion, a male screw portion is provided on the shaft portion, and an accommodation recess and a through hole extending from the accommodation recess are provided in the first pressing member. The second pressing member is provided with a female screw portion,
The head of the fixing screw is housed in the housing recess of the first pressing member, and the male screw portion of the fixing screw passes through the through hole of the first pressing member and the female thread portion of the second pressing member. Screwed into the
Furthermore, a pressing surface for pressing the processing tool is provided on one surface of the fixing member, and the other surface has a third tapered surface corresponding to the first tapered surface of the first pressing member at one end thereof. And the other end is provided with a fourth tapered surface corresponding to the second tapered surface of the second pressing member,
When the fixing screw is rotated in the tightening direction, the first pressing member is pressed toward the second pressing member by the head portion of the fixing screw acting on the receiving recess of the first pressing member. The second pressing member is pressed toward the first pressing member by the action of the male screw portion of the fixing screw and the female screw portion of the second pressing member, and the first pressing member The first taper surface acts on the third taper surface of the fixing member, and the second taper surface of the second pressing member acts on the fourth taper surface of the fixing member, whereby the fixing member The pressing surface presses the working tool.

Moreover, in the processing tool fixture according to claim 2 of the present invention, a central recess is provided in the longitudinal central portion of the fixing member, and one side surface of the central recess functions as a first contact portion, The other side surface of the central recess functions as a second contact portion, and the first and second pressing members are provided with contact protrusions positioned in the central recess of the fixing member. To do.

  Furthermore, in the processing tool fixture according to claim 3 of the present invention, a detachment preventing screw for preventing the fixing screw from being detached is screwed into the opening of the receiving recess of the first pressing member. The separation preventing screw is provided with an operation opening for rotating the fixing screw.

According to the processing tool mounting tool of the first aspect of the present invention, the pressing tool includes the first and second pressing members that are movable in directions close to and away from each other, and the first pressing member has the first taper. A second taper surface is provided on the second pressing member, and a third taper surface is provided on the fixing member corresponding to the first taper surface, and a second taper surface is provided on the fixing member. Since the four taper surfaces are provided, when the fixing screw is rotated in the tightening direction, the first and second pressing members move in a direction close to each other, and the first taper surface of the first pressing member is the fixing member. And the second taper surface of the second pressing member acts on the fourth taper surface of the fixing member, whereby the fixing member presses the processing tool and the processing tool is used as the tool mounting portion. Can be attached. At this time, the first taper surface of the first pressing member acts on the third taper surface of the fixing member, and the second taper surface of the second pressing member acts on the fourth taper surface of the fixing member. Acts uniformly on the machining tool, and the machining tool can be reliably fixed via the fixing member.
Further, the head of the fixing screw is accommodated in the accommodating recess of the first pressing member, and the male screw portion is screwed into the female screw portion of the second pressing member through the through hole of the first pressing member. When rotating in the tightening direction, the head of the fixing screw acts on the housing recess of the first pressing member, whereby the first pressing member is pressed toward the second pressing member, and the male screw portion of the fixing screw. By the action of the female screw portion of the second pressing member, the second pressing member is pressed toward the first pressing member, and thus the first and second pressing members are moved in the directions close to each other. Thus, the fixing member acts substantially uniformly on the machining tool, and the machining tool can be reliably fixed via the fixing member. When the fixing screw is rotated in the loosening direction, the first and second pressing members are moved away from each other by the action of the male screw portion of the fixing screw and the female screw portion of the second pressing member.

Further, according to the processing tool fixture according to claim 2 of the present invention, the central recess in the longitudinal direction of the fixing member is provided with the central recess acting as the first and second abutting portions. Since the pressing member is provided with the contact protrusion positioned in the central recess of the fixing member, it is possible to prevent the first and second pressing members from being detached.

  Furthermore, according to the processing tool fixture according to claim 3 of the present invention, since the detachment prevention screw is screwed into the opening of the receiving recess of the first pressing member, the fixing screw is rotated in the loosening direction. When it is moved, the fixing screw comes into contact with the detachment preventing screw and is prevented from rotating in the loosening direction. Therefore, it is possible to reliably prevent the fixing screw from being removed when the detachment preventing screw is attached. Further, since the separation preventing screw is provided with an operation opening for rotating the fixing screw, the fixing screw can be rotated in the tightening direction and the loosening direction through the operation opening.

  Hereinafter, with reference to an accompanying drawing, one embodiment of a processing tool fixture according to the present invention is described. FIG. 1 is a front view showing an example of a machine tool to which a machining tool fixture of one embodiment is applied, FIG. 2 is a perspective view showing a turret in the machine tool of FIG. 1, and FIG. 2 is an exploded perspective view showing the processing tool fixture attached to the turret of FIG. 2, and FIG. 4 is a cross-sectional view showing the processing tool fixture shown in FIG. 3 in a state where the fixing screw is loosened, FIG. 5 is a cross-sectional view showing the working tool fixture shown in FIG. 3 in a state where a fixing screw is tightened.

  In FIG. 1, an NC lathe shown as an example of a machine tool includes a lathe body 2 installed on a floor surface of a factory or the like, and a first main spindle portion is provided at one end portion (left end portion in FIG. 1) of the lathe body 2. 4 is provided. A first main shaft (not shown) is rotatably supported in the first main shaft portion 4, and a first chuck means 6 is mounted on the first main shaft, and a first process to be processed on the first chuck means 6. An object (not shown) is attached, and the first main shaft, the first chuck means 6 and the first workpiece are rotated in a predetermined direction by a first drive source (not shown). Further, a second main spindle 8 is provided at the other end of the lathe body 2 (right end in FIG. 1). A second main shaft (not shown) is rotatably supported in the second main shaft portion 8, and a second chuck means 10 is mounted on the second main shaft, and a second process to be processed on the second chuck means 10. An object (not shown) is attached, and the second spindle, the second chuck means 10 and the second workpiece are rotated in a predetermined direction by a second drive source (not shown).

  A reciprocating table 12 is disposed between the first main shaft portion 4 and the second main shaft portion 8, and this reciprocating table 12 is arranged in the Z-axis direction (left-right direction in FIG. 1) via the first guide support mechanism 14. The lathe body 2 is supported so as to be reciprocally movable. In addition, the reciprocating table 12 is equipped with a blade table 20, which is connected to the X-axis direction (direction perpendicular to the Z-axis direction through the second guide support mechanism 22 in FIG. It is supported by the reciprocating table 12 so as to be reciprocally movable in a direction perpendicular to the paper surface.

  In this embodiment, a blade mounting base 24 is provided on one side of the blade table 20 (left side in FIG. 1), and a processing tool mounting 26 (described later in FIG. 2 and FIG. 3) is provided on the tool mounting portion of the blade mounting base 24. The first machining tool 28, for example, a machining tool for cutting, is attached using the reference). The first processing tool 28 is positioned opposite to the first chuck means 6 of the first main spindle 4 and performs a required processing on the first workpiece held by the first chuck means 6.

  Further, a turret type tool post 30 is provided on the other side of the tool table 20 (right part in FIG. 1). The turret tool post 30 includes an attachment main body 32 attached to the tool table 20 and a turret 34 rotatably supported by the attachment main body 32 via a rotation shaft (not shown). A second processing tool 36 (see FIG. 2), for example, a cutting processing tool, is attached to the tool attachment portion 35 of 34 using a processing tool attachment 26 described later. The second machining tool 36 is positioned opposite to the second chuck means 10 of the second main spindle 8 and performs a required machining on the second workpiece held by the second chuck means 10.

  Next, with reference to FIG.2 and FIG.3, the processing tool attachment 26 for attaching a processing tool is demonstrated. This processing tool attachment 26 is used when attaching the first processing tool 28 to the tool attachment portion of the blade attachment base 24 and attaching the second processing tool 36 to the tool attachment portion 35 of the turret 34. In the description, an example applied to the tool mounting portion 35 of the turret 34 will be described, but the present invention can be similarly applied when applied to the blade mounting portion of the blade mounting base 24.

  2 and 3, the illustrated processing tool attachment 26 includes a fixing member 38 for fixing the second processing tool 36 and a pressing tool 40 for pressing the fixing member 38. Reference numeral 40 denotes a pair of pressing members, that is, first and second pressing members 42 and 44, and a fixing screw 46 for moving the first and second pressing members 42 and 44 in a direction approaching and separating from each other. doing. The fixing member 38 is composed of an elongated block-like member, and one surface (the upper surface in FIGS. 2 and 3) is formed flat. A central recess 48 is provided at the center in the longitudinal direction of the other surface (the lower surface in FIGS. 2 and 3) of the fixing member 38, and one side surface of the center recess 48 functions as the first contact portion 50, and the other side surface. Functions as the second contact portion 52. One end portion (left end portion in FIG. 3) of the other surface of the fixing member 38 is provided with a taper surface 54 (constituting a third taper surface), and the other end portion (right end portion in FIG. 3) is provided with a taper surface 56. (Functioning as a fourth taper surface) is provided. One tapered surface 54 inclines inward toward the first pressing member 42 (that is, the thickness gradually increases inward), extends linearly to the central concave portion 48, and extends to the other side. The taper surface 56 is inclined inward toward the second pressing member 44 (that is, the thickness gradually increases inward), and extends in a linear manner up to the central recess 48.

  Further, one surface (upper surface in FIG. 3) of the first pressing member 42 is provided with a tapered surface 58 (constituting the first tapered surface) at one end portion (left end portion in FIG. 3), and the other end portion (FIG. 3). 3 is provided with a contact protrusion 60 that protrudes toward the fixing member 38, and a recess 62 is provided between the tapered surface 58 and the contact protrusion 60. The taper surface 58 of the first pressing member 42 corresponds to one taper surface 54 (third taper surface) of the fixing member 38, is inclined outward toward the fixing member 38, and is linear from the recess 62 to the outer end. Inclined and extended. The other surface (the lower surface in FIG. 3) of the first contact member 42 is formed flat.

  Furthermore, the second pressing member 44 is configured to be substantially bilaterally symmetric with the first pressing member 42, and a tapered surface 64 (constituting a second tapered surface) is provided at one end (right end in FIG. 3). In addition, a contact protrusion 66 that protrudes toward the fixing member 38 is provided at the other end (left end in FIG. 3), and a recess 68 is provided between the tapered surface 64 and the contact protrusion 66. The taper surface 64 of the second pressing member 44 corresponds to the other taper surface 56 (fourth taper surface) of the fixing member 38, is inclined outward toward the fixing member 38, and is linear from the recess 68 to the outer end. Inclined and extended. The other surface (the lower surface in FIG. 3) of the second contact member 44 is also formed flat.

  In this embodiment, an accommodation recess 70 is further provided at one end of the first pressing member 42, and a through-hole 72 (see FIGS. 4 and 5) passes through the first pressing member 42 from the accommodation recess 70. Reference) is provided. The second pressing member 44 is provided with a female screw portion 74. The fixing screw 46 has a head portion 76 and a shaft portion 78 extending from the head portion 76, and a male screw portion 80 is provided on the shaft portion 78. As shown in FIGS. 4 and 5, the shaft portion 78 of the fixing screw 46 is inserted through the through hole 72 of the first pressing member 42, and the male screw portion 80 is screwed into the female screw portion 74 of the second pressing member 44. Worn.

  When the fixing screw 46 is rotated and tightened in the tightening direction, the head 76 is accommodated in the accommodating recess 70 as shown in FIG. A detachment prevention screw 82 is attached to the opening of the housing recess 70. In this embodiment, a female screw portion 84 is provided at the opening of the housing recess 70, and a male screw portion 86 is provided at the detachment prevention screw 82, and the male screw portion 86 is detachably screwed into the female screw portion 84 of the housing recess 70. Worn. The separation preventing screw 82 screwed in this way has a predetermined distance from the head 76 of the fixing screw 46 screwed into the female screw portion 74 of the second pressing member 44 through the through hole 72 of the first pressing member 42. Screwed to keep. The separation prevention screw 82 is provided with a circular operation opening 87, and an operation tool (not shown) can be inserted through the operation opening 87 to rotate the fixing screw in the tightening direction and the loosening direction. it can.

  When attaching the 2nd processing tool 36 using such a processing tool attachment 26, it attaches to the tool attachment part 35 of the turret 34 so that attachment or detachment is possible. The tool mounting portion 35 of the turret 34 is configured by mounting recesses 88 disposed on the turret 34 at intervals in the circumferential direction, and is mounted between the side walls 90 and 92 that define the mounting recesses 88. The second machining tool 36 includes a long and narrow rectangular parallelepiped tool body 94 (the upper surface and the lower surface in FIGS. 4 and 5 are formed flat), and a tool portion 96 is provided at the tip of the tool body 94. ing. For example, as shown in FIGS. 2, 4, and 5, a tool body 94 of the second processing tool 36 is provided so as to be in contact with the side wall 90 of the mounting recess 88, and the processing tool fixture 26 is in contact with the side wall 92. The first and second pressing members 42 and 44 are attached, and a fixing member 38 is interposed between the tool main body 94 of the second processing tool 36 and the first and second pressing members 42 and 44.

  When attaching the 2nd processing tool 36 to the tool attachment part 35 of this turret 34, it can attach as follows, for example. As shown in FIG. 4, the shaft portion 78 of the fixing screw 46 is inserted through the through hole 72 of the first pressing member 42, and the male screw portion 80 is screwed to the female screw portion 74 of the second pressing member 44. A detachment prevention screw 82 is screwed into the opening of the pressing member 42, and the fixing member 38 is placed on the upper side of the first and second pressing members 42, 44 thus connected via the fixing screw 46. When placed in this manner, as shown in FIG. 4, one tapered surface 54 (third tapered surface) of the fixing member 38 is supported by the tapered surface 58 (first tapered surface) of the first pressing member 42, and The other taper surface 56 (fourth taper surface) of the fixing member 38 is supported by the taper surface 64 (second taper surface) of the second pressing member 44. In such a supported state, the first and second pressing members 42 are provided. , 44 are located in the central recess 48 of the fixing member 38.

  Next, the first and second pressing members 42 and 44 in a state where the fixing member 38 is placed are attached so as to be placed on the tool attachment portion 35 of the turret 34, specifically, the side wall 92 of the attachment recess 88, Further, the tool main body 94 of the second processing tool 36 is placed on the upper side of the fixing member 38. In FIG. 4, for easy understanding, the second machining tool 36 is shown in contact with the side wall 90 of the mounting recess 88, and there is a gap between the second machining tool 36 and the fixing member 38. In practice, however, the second machining tool 36 is placed on the upper side of the fixing member 38, and a gap exists between the second machining tool 36 and the side wall 90 of the mounting recess 88.

  Thereafter, the fixing screw 46 is rotated in the tightening direction using a tool (not shown). 4 and 5, the head 76 of the fixing screw 46 acts on the bottom of the housing recess 70 of the first pressing member 42, and the first pressing member 42 is rotated as described above. The second pressing member 44 is pressed toward the first pressing member 42 by the action of the male screw portion 80 of the fixing screw 46 and the female screw portion 74 of the second pressing member 44 while being pressed toward the second pressing member 44. Then, the first and second pressing members 42 and 44 are moved in directions close to each other. Thus, the taper surface 58 (first taper surface) of the first pressing member 42 acts on one taper surface 54 (third taper surface) of the fixing member 38, and the taper surface 64 (first taper surface) of the second pressing member 44. 2 taper surface) acts on the other taper surface 56 (fourth taper surface) of the fixing member 38, and the fixing member 38 is moved upward in FIG. 4 by the action of these four taper surfaces.

  When the fixing screw 46 is strongly tightened in the tightening direction in this manner, the tapered surfaces 58 and 64 of the first and second pressing members 42 and 44 and the tapered surfaces 54 and 56 of the fixing member 38 are brought into contact as shown in FIG. The fixing member 38 presses the tool main body 94 of the second processing tool 36 against the side wall 90 of the mounting recess 88, and the second processing tool 36 is securely sandwiched and fixed between the side wall 90 and the fixing member 38. . In such a fixed state, the head 76 of the fixing screw 46 is accommodated in the accommodating recess 70 of the first pressing member 42.

  In such a mounted state, when the fixing screw 46 is rotated in the loosening direction, the head portion 76 of the fixing screw 46 comes into contact with the separation preventing screw 82 and the fixing screw 46 moves in the separation direction. This prevents the first and second pressing members 42 and 44 from coming off.

  When the second machining tool 36 is removed, the fixing screw 46 may be rotated in the loosening direction, contrary to the above. Thus, the first and second pressing members 42 and 44 are moved away from each other, and the tapered surfaces 58 and 64 of the first and second pressing members 42 and 44 and the tapered surfaces 54 and 56 of the fixing member 38 are moved. Due to the action, the fixing member 38 is moved downward in FIG. 4, and a gap is formed between the second processing tool 36 and the side wall 90 of the mounting recess 88, and the second processing tool 36 can be easily removed from the tool mounting portion 35. Can do.

  In the machine tool provided with the processing tool attachment 26, the second processing tool 36 can be attached to the tool attachment portion 35 of the turret 34 by tightening one fixing screw 46. By loosening, the second machining tool 36 can be removed from the tool mounting portion 35 of the turret 34, and the second machining tool 36 can be attached and detached with a simple operation. In addition, the fixing member 38 is entirely attached to the tool body of the second processing tool 36 by the action of the tapered surfaces 58 and 64 of the first and second pressing members 42 and 44 and the tapered surfaces 54 and 56 of the fixing member 38. 94, the second machining tool 36 can be reliably attached to the tool attachment portion 35 of the turret 34.

  As mentioned above, although one Embodiment of the processing tool fixture according to this invention was described, this invention is not limited to this embodiment, A various deformation | transformation thru | or correction | amendment are possible without deviating from the scope of the present invention. .

  In the embodiment described above, the detachment prevention screw 82 is provided to prevent the fixing screw 46 from detaching. However, instead of such a detachment prevention screw 82, a detachment prevention member (for example, a ring-shaped member) is provided. ) May be provided integrally with the first pressing member 42. In this case, in a state where the fixing screw 46 is screwed to the second pressing member 44 through the first pressing member 42, the separation preventing member can be integrated with the opening of the housing recess 70 by welding or the like.

The front view which shows an example of the machine tool to which the processing tool attachment tool of one Embodiment is applied. The perspective view which shows the turret in the machine tool of FIG. The perspective view which decomposes | disassembles and shows the processing tool attachment tool attached to the turret of FIG. Sectional drawing which shows the state when the screw for fixing is loosened for the processing tool attachment shown in FIG. FIG. 4 is a cross-sectional view showing the processing tool fixture shown in FIG. 3 in a state where a fixing screw is tightened.

Explanation of symbols

2 Lathe body 24 Tool mounting base 26 Processing tool mounting tool 30 Turret type tool base 35 Tool mounting part 36 Second processing tool 38 Fixing member 40 Pressing tool 42, 44 Pressing member 46 Fixing screw 54, 56, 58, 64 Tapered surface 70 Housing recess 76 Head 78 Shaft 82 Screw for preventing separation

Claims (3)

A processing tool attachment for detachably attaching a processing tool to a tool attachment portion of a machine tool,
A fixing member for fixing the processing tool to the tool mounting portion, and a pressing tool for pressing the fixing member against the processing tool,
The pressing tool is fixed for moving the first and second pressing members, which are movably arranged in directions approaching and separating from each other, and the first and second pressing members in directions approaching and separating from each other. A first taper surface that is inclined toward the fixing member toward the outside and provided on one side of the first pressing member, and on the one surface of the second pressing member toward the outside. A second tapered surface inclined toward the fixing member side is provided;
The fixing screw has a head portion and a shaft portion extending from the head portion, a male screw portion is provided on the shaft portion, and an accommodation recess and a through hole extending from the accommodation recess are provided in the first pressing member. The second pressing member is provided with a female screw portion,
The head of the fixing screw is housed in the housing recess of the first pressing member, and the male screw portion of the fixing screw passes through the through hole of the first pressing member and the female thread portion of the second pressing member. Screwed into the
Furthermore, a pressing surface for pressing the processing tool is provided on one surface of the fixing member, and the other surface has a third tapered surface corresponding to the first tapered surface of the first pressing member at one end thereof. And the other end is provided with a fourth tapered surface corresponding to the second tapered surface of the second pressing member,
When the fixing screw is rotated in the tightening direction, the first pressing member is pressed toward the second pressing member by the head portion of the fixing screw acting on the receiving recess of the first pressing member. The second pressing member is pressed toward the first pressing member by the action of the male screw portion of the fixing screw and the female screw portion of the second pressing member, and the first pressing member The first taper surface acts on the third taper surface of the fixing member, and the second taper surface of the second pressing member acts on the fourth taper surface of the fixing member, whereby the fixing member The processing tool mounting tool, wherein the pressing surface presses the processing tool. A central recess is provided in the longitudinal central portion of the fixing member, one side surface of the central recess functions as a first contact portion, and the other side surface of the central recess functions as a second contact portion. 2. The processing tool attachment according to claim 1, wherein the first and second pressing members are provided with contact protrusions positioned in the central recess of the fixing member. A release prevention screw for preventing the fixing screw from being detached is screwed into the opening of the housing recess of the first pressing member, and the fixing screw is rotated to the release prevention screw. The processing tool mounting tool according to claim 1 or 2 , wherein an operation opening is provided.

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