JP4233168B2 - Tool alignment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool aligning device for aligning the cutting edge positions of a plurality of tools mounted on a tool rest of a machine tool.
[0002]
[Prior art]
In a tool post installed on a machine tool such as an NC lathe, a tool post that supports a plurality of tools in parallel and selects a desired tool by linear motion of the tool post itself is called a comb tooth tool post. Is known. For example, when a comb tooth turret is installed on an NC lathe, the comb tooth turret is generally divided into two orthogonal axes (hereinafter referred to as an X axis and a Y axis) within a plane orthogonal to the rotation axis of the workpiece to be gripped by the rotation spindle. ) It can be translated in the direction.
[0003]
In this configuration, when selecting a tool, the comb tooth turret is moved in the Y-axis direction (that is, the tool parallel direction) at a position where the cutting edges of a plurality of tools mounted on the comb tooth turret do not contact the workpiece. Translate. The tool selection is completed when the cutting edge of the desired tool and the rotation axis of the workpiece are aligned in the X-axis direction. From this state, the comb tooth turret is translated in the X-axis direction to advance the selected tool toward the workpiece, and the cutting edge of the tool is brought into contact with the workpiece to perform the machining. At this time, if the selected tool is a cutting tool, the cutting depth of the cutting tool with respect to the workpiece and the retraction standby position of the cutting edge when the cutting tool is not used are determined by controlling the X-axis movement of the comb tooth tool post. The That is, by controlling the X-axis movement, it is possible to minimize the cutting amount and retraction amount of the cutting tool, shorten the moving time of the cutting tool, and effectively reduce the machining time. In this specification, “the cutting edge of the cutting tool” indicates the corner portion of the cutting edge unless otherwise specified.
[0004]
In the NC lathe described above, when multiple tools are mounted on the comb turret, it is important that each tool is mounted so that the cutting edge can always be positioned at the same distance from the rotation axis of the workpiece when selection is completed. It is. Therefore, prior to the machining operation, the cutting edge positions of the plurality of cutting tools mounted on the comb tool post are set to a virtual plane (hereinafter referred to as the Z axis parallel to the rotation axis of the workpiece and the Y axis described above). (Referred to as a reference plane).
[0005]
In order to carry out such a tool aligning operation, a tool aligning device having a flat plate-shaped aligning member that is detachably attached to a comb tooth turret has been proposed. The alignment member can define the above-described reference plane on the lathe machine base by placing its flat main surface fixedly with respect to the comb tooth turret. When mounting a plurality of cutting tools on the comb tool post, the alignment member is first fixed at a predetermined position on the tool post, and then the plurality of cutting tools are brought into contact with the main surface of the alignment member while the cutting edges of the cutting tools are in contact with each other. Attach and fix to a specified tool mounting part of the tool post. Thereafter, when the alignment member is removed from the tool post, the plurality of cutting tools are mounted on the tool post in a state in which their cutting edges are aligned on substantially the same virtual plane (reference plane on the lathe table). According to this tool aligning device, the tool aligning operation can be performed while the comb tooth turret is separated from the lathe as well as the tool aligning operation with the comb tooth turret being installed on the lathe machine base. it can.
[0006]
[Problems to be solved by the invention]
When replacing the cutting tool that has worn or damaged the cutting edge among the plurality of cutting tools that have been aligned on the comb tooth tool post by the conventional tool aligning device described above, remove the cutting tool from the tool post. After that, it is necessary to attach the alignment member to the tool rest again, and to align the blade edge position again between the other previously installed tool and the newly installed tool. At this time, in order for the main surface of the alignment member to define the above-described reference surface, the alignment member must be fixed to the tool post in a state where the main surface is in contact with the cutting edge of another tool that does not require replacement. As a result, there is a concern that even the cutting edge of the cutting tool that does not require replacement may be damaged due to the replacement work of other cutting tools.
[0007]
The purpose of the present invention is to replace any of a plurality of tools that have already aligned the cutting edge position in a tool aligning apparatus for aligning the cutting edge positions of a plurality of tools mounted on the tool rest of the machine tool. An object of the present invention is to provide a tool aligning device that can easily align the cutting edge of a new tool with the cutting edge of another tool without damaging the cutting edge of another tool that does not require replacement.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a tool aligning device for aligning the cutting edge positions of a plurality of tools mounted on a tool rest of a machine tool, and a base that is fixedly arranged with respect to the tool rest; A plurality of piece members supported by the base body so as to be independently displaceable, and each of the plurality of piece members is capable of abutting the cutting edge of the tool on the tool rest and a non-acting position where the cutting edge cannot be abutted. A tool aligning device characterized by having an alignment surface that can be displaced between the two.
[0009]
In this tool aligning apparatus, it is advantageous that the alignment surfaces of the plurality of piece members are arranged on substantially the same plane at the operation position.
Further, the plurality of piece members can be rotatably supported by the base body.
In this case, it is preferable that the plurality of piece members have substantially the same rotation axis.
Moreover, it is preferable that each arrangement | positioning of the some piece member on a base | substrate can be changed.
Further, it is advantageous that the base has an attachment portion for attaching the base to the tool post in a predetermined posture.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the drawings, the same or similar components are denoted by common reference numerals.
Referring to the drawings, FIG. 1 is a front view of a tool aligning device 10 according to a first embodiment of the present invention, FIG. 2 is a plan view of the tool aligning device 10, FIG. 3 is a bottom view of the tool aligning device 10, and FIG. FIG. 5 is a sectional view of a main part of the tool aligning device 10. As will be described later, the tool aligning device 10 can be used by being attached to a tool post installed on a machine tool such as an NC lathe, particularly a comb tooth tool post.
[0011]
The tool aligning device 10 includes a base 12 that is fixedly arranged with respect to a tool post (not shown), and a plurality (five pieces in the figure) of piece members 14 that are supported by the base 12 so as to be independently displaceable. Configured. The base 12 includes a mounting portion 18 that is detachably attached to the tool post by a knob bolt 16 and a flat plate-like support portion 22 that is fixed to the mounting portion 18 by a fixing bolt 20. The support portion 22 rotatably supports the plurality of piece members 14 via the pivot 24. Note that the attachment portion 18 and the support portion 22 may be integrally formed with each other.
[0012]
The mounting portion 18 of the base body 12 has mounting surfaces 18a and 18b orthogonal to the L-shape, and the mounting surfaces 18a and 18b are brought into close contact with the surface of the tool post as will be described later, thereby providing a predetermined surface on the tool post. Held in posture. A bolt hole 19 that receives the thumb bolt 16 is formed through the mounting portion 18. The bolt hole 19 has a tapered surface 19a on the bolt insertion side and opens. The thumb bolt 16 is integrally provided with a head portion 16a that can be operated by a finger with a finger, a shaft portion 16b extending from the head portion 16a, and a screw portion 16c formed at the end of the shaft portion 16b. At the base end of the shaft portion 16b, a tapered surface 16d that can slide and contact with the tapered surface 19a of the bolt hole 19 is provided.
[0013]
The support portion 22 of the base 12 has a substantially rectangular flat main surface 22a and a back surface 22b opposite to the main surface 22a. On one side edge 22c extending in the longitudinal direction of the support portion 22, a plurality (five in the drawing) of rectangular cutouts 26 each opened to the main surface 22a, the back surface 22b, and the side edge 22c are provided at predetermined intervals. Furthermore, a rectangular groove 28 that communicates with all the rectangular notches 26 and extends linearly is formed in the back surface 22 b of the support portion 22. A cylindrical pivot 24 is received in a rectangular groove 28 and is disposed across all rectangular notches 26. Both ends of the pivot 24 are fixedly supported in the rectangular groove 28 by presser bolts 30 and washers 32 that are screwed onto the back surface 22 b of the support portion 22.
[0014]
Each piece member 14 is integrally provided with a shaft attachment portion 36 having a through hole 34 that can receive the pivot 24 and a flat arm portion 38 that extends from the shaft attachment portion 36 in one direction. The shaft attachment portion 36 of each piece member 14 is accommodated in each rectangular notch 26 of the support portion 22 in a state where the pivot 24 is received in the through hole 34. In this way, the plurality of piece members 14 are configured to freely rotate around substantially the same rotation axis 24 a defined by the pivot 24 on the support portion 22 of the base 12. Preferably, the piece member 14, the support portion 22, and the pivot shaft 24 can be smoothly rotated in a state where the piece member 14 reduces the rattling of the pivot shaft 24 in the radial direction and the axial direction as much as possible. Dimensioned to Further, the through hole 34 is not limited to the illustrated square hole, and can be formed in various shapes such as a round hole.
[0015]
The arm portion 38 of each piece member 14 has a substantially rectangular flat main surface 38a and a flat back surface 38b opposite to the main surface 38a. The back surface 38 b of the arm portion 38 can contact the main surface 22 a of the support portion 22 of the base 12. The main surface 38a of the arm portion 38 is a tool on the tool post (see FIG. 5A) when the piece member 14 is disposed at a position where the back surface 38b contacts the main surface 22a of the support portion 22 (FIG. 5A). It acts as an alignment surface 38a that can be brought into contact with the blade edge (not shown) and can position the blade edge at a predetermined position. In this specification, the position at which the alignment surface 38a is placed when the back surface 38b of the arm portion 38 of each piece member 14 comes into contact with the main surface 22a of the support portion 22 of the base body 12 is referred to as an operation position (FIG. 5A). The position of the alignment surface 38a when the piece member 14 is rotated and displaced clockwise in FIG. 5 from the operating position and the tool tip of the tool on the tool post cannot be contacted is defined as the non-operating position (FIG. 5 ( b)). The plurality of piece members 14 supported by the base 12 are arranged such that the alignment surfaces 38a of their arm portions 38 are arranged on substantially the same plane at the operation position.
[0016]
Next, with reference to FIG.6 and FIG.7, the structure and effect | action of the tool aligning apparatus 10 are further demonstrated in the form attached to the comb-tooth tool post 40 installed in NC lathe.
The comb tooth turret 40 includes a plurality of groove-shaped tool mounting portions 44 that detachably support a plurality of tools 42 in a parallel arrangement, and a base 46 that integrally supports the tool mounting portions 44, and an NC lathe Are installed on a lathe machine table around a spindle table 50 containing a rotating spindle 48. The comb-tooth tool rest 40 is configured to be able to translate in the directions of two orthogonal axes (hereinafter referred to as the X axis and the Y axis) in a plane orthogonal to the rotation axis 52a of the workpiece 52 held by the rotation spindle 48. The That is, when the tool is selected, the comb tooth turret 40 is translated in the Y-axis direction (that is, the parallel direction of the tool 42) at a position where the cutting edges 42a of the plurality of tools 42 mounted on the tool mounting portion 44 do not contact the workpiece 52. To do. The tool selection is completed when the cutting edge 42a of the desired tool 42 and the rotation axis 52a of the workpiece 52 are aligned in the X-axis direction. From this state, the comb-tooth tool post 40 is translated in the X-axis direction to advance the selected tool 42 toward the work material 52, and the cutting edge 42 a of the tool 42 is brought into contact with the work material 52. Perform processing.
[0017]
The comb tooth tool post 40 can be equipped with a plurality of types of cutting tools 42 for performing outer surface processing such as outer rounding and parting off on the workpiece 52 as the tool 42. In this case, as described above, it is important that each cutting tool 42 is mounted so that the cutting edge 42a can always be arranged at a position substantially the same distance from the rotation axis 52a of the workpiece 52 when selection is completed. Therefore, using the tool aligning device 10, prior to the machining operation, the cutting edge positions of the plurality of cutting tools 42 attached to the comb tooth turret 40 are set to the Z axis parallel to the rotation axis 52a of the workpiece 52 and the Y described above. It is extremely effective to align them on a reference plane parallel to both axes. Hereinafter, a tool aligning operation using the tool aligning device 10 will be described.
[0018]
Before attaching the cutting tool 42 to the comb tool post 40, first, the base 12 of the tool aligning device 10 is fixed to the base 46 of the tool post 40 by operating the knob bolt 16. At this time, while the knob bolt 16 is screwed into a screw hole (not shown) provided in the base portion 46 of the tool post 40, the taper surface 16 d of the knob bolt 16 tapers the bolt hole 19 of the mounting portion 18 of the base 12. The surface 19a is slidably contacted and pressed (FIG. 4). Accordingly, by firmly screwing the knob bolt 16 into the screw hole of the base 46 of the tool post 40, the mounting surfaces 18a and 18b of the mounting portion 18 of the base 12 are brought into close contact with the front surface 46a and the lower surface 46b of the base 46, respectively. As a result, the base 12 is fixedly held in a normal posture on the base 46 (FIG. 7).
[0019]
The plurality of piece members 14 of the tool aligning device 10 are placed on the main surface 22 a of the support portion 22 of the base 12. Accordingly, the alignment surfaces 38a of the arm portions 38 of the piece members 14 are all placed at the operating positions and are arranged on substantially the same plane. In this state, when the base 12 is fixed to the base 46 of the comb tooth turret 40 and held in a normal posture, the plurality of piece members 14 supported by the support portion 22 are attached to the plurality of tools on the comb tooth turret 40. They are arranged on the respective extensions of the tool mounting parts 44 at an equal distance from the part 44. Next, the tool 42 is mounted on each tool mounting portion 44. At this time, the cutting edge 42a of each cutting tool 42 is positioned in contact with the alignment surface 38a of the arm part 38 of each piece member 14 of the tool aligning device 10, and in this state, each cutting tool 42 is fixed to the tool mounting part 44. . As a result, the plurality of cutting tools 42 are mounted on the comb tooth tool table 40 with their cutting edges 42a aligned on substantially the same virtual plane (reference surface on the lathe machine table). In this way, after the cutting tool 42 is completely mounted, the tool aligning device 10 is removed from the comb tooth tool base 40.
[0020]
The above-described tool alignment operation can be performed in a state where the comb-tooth tool rest 40 is installed at a predetermined position on the lathe machine base. In this case, when the tool aligning device 10 is fixed to the comb tooth turret 40 in a normal posture, the alignment surfaces 38a of the arm portions 38 of the plurality of piece members 14 placed at the operating positions are arranged on the lathe machine table in the Y axis. And a predetermined reference plane parallel to the Z axis. Therefore, if a plurality of cutting tools 42 are mounted on the comb tooth tool base 40 in the above procedure, the cutting edges 42a of these cutting tools 42 are arranged in alignment with the reference plane. Alternatively, the above-described tool alignment operation can be performed in a state where the comb tooth tool post 40 is removed from the lathe machine base. In this case, in the above procedure, the plurality of cutting tools 42 are fixed to the comb tooth turret 40 with their cutting edges 42a aligned on substantially the same virtual plane, and in this state, the comb tooth turret 40 is placed on the lathe machine base. If installed at a predetermined position, the cutting edges 42a of the plurality of cutting tools 42 are arranged on a lathe machine table so as to be aligned with a predetermined reference plane.
[0021]
Of the plurality of cutting tools 42 aligned at the cutting edge position on the comb tool post 40, when trying to replace the cutting tool 42 that has worn or damaged the cutting edge, after removing the cutting tool 42 from the tool post 40, Again, the tool aligning device 10 is attached to the tool post 40, and the tool aligning operation is performed again between the other cutting tool 42 previously mounted and the cutting tool 42 to be newly mounted. In the tool aligning operation at the time of the tool change, the piece member 14 of the tool aligning device 10 corresponding to the other cutting tool 42 previously mounted is rotated on the support portion 22 of the base 12 and separated from the main surface 22a. The alignment surface 38a of the arm portion 38 is moved from the action position to the non-action position. In this state, if the tool aligning device 10 is fixed to the comb tooth turret 40 in a normal posture, the cutting edge 42a of the other cutting tool 42 that has been previously attached contacts the alignment surface 38a of the corresponding piece member 14. Instead, it is located away from the tool aligning device 10. On the other hand, the alignment surface 38a of the piece member 14 corresponding to the cutting tool 42 that needs to be replaced is in the working position and is substantially the same plane as the virtual plane on which the cutting edge 42a of the other mounting tool 42 is mounted ( A reference plane is defined on the lathe table. Therefore, the cutting edge 42a of the new cutting tool 42 is positioned in contact with the alignment surface 38a of the corresponding piece member 14 of the tool aligning device 10, and the new cutting tool 42 is fixed to the corresponding tool mounting portion 44 in this state. As a result, the cutting edge 42a of the new cutting tool 42 is arranged on the same virtual plane as the cutting edge 42a of the other cutting tool 42 that has been previously mounted.
[0022]
As described above, according to the tool aligning device 10, when replacing any one of the plurality of cutting tools 42 mounted with the cutting edge positions aligned on the comb-tooth tool post 40, the tool aligning apparatus 10 supports the cutting tool 42 that does not require replacement. The tool aligning operation can be performed again in a state where the alignment surface 38a of the piece member 14 to be placed is placed at the non-operation position. Therefore, it is possible to easily align the blade edge 42a of the new cutting tool 42 with the cutting edge 42a of another cutting tool 42 without damaging the cutting edge 42a of the cutting tool 42 that does not require replacement. In addition, in order for the alignment surface 38a of the piece member 14 corresponding to the cutting tool 42 that needs to be changed to define a plane that is substantially the same as the virtual plane on which the cutting edge 42a of the other cutting tool 42 is located, the tool aligning device 10 is combed. It will be appreciated that the tooth turret 40 needs to be accurately fixed and mounted in a normal position.
[0023]
8 and 9 show a tool aligning device 60 according to a second embodiment of the present invention in a front view and a bottom view, respectively. The tool aligning device 60 has substantially the same configuration as the tool aligning device 10 described above except that the arrangement of each of the plurality of piece members 14 on the base 12 can be changed. Therefore, the same or similar components are denoted by common reference numerals, and the description thereof is omitted.
[0024]
The support portion 22 of the base 12 of the tool aligning device 60 has one opening that opens to the main surface 22a, the back surface 22b, and the side edge 22c, instead of the plurality (five in the figure) of rectangular notches 26 in the tool aligning device 10. A large rectangular notch 62 is formed. The pivot 24 is disposed across the rectangular notch 62 and is fixedly supported in the rectangular groove 28 by the presser bolt 30 and the washer 32 at both ends thereof. A plurality (five pieces in the figure) of the piece members 14 are rotatably supported on the pivot 24. Each piece member 14 is arranged in a fixed position on the pivot 24 in the axial direction by a pair of O-rings 64 fitted to the pivot 24 (the piece members 14 at both ends are each one O-ring 64). The
[0025]
According to such a configuration, the piece member 14 on the support portion 22 of the base body 12 corresponds to the position of the tool mounted on the tool post (for example, the comb tooth tool post 40) to which the tool aligning device 60 is attached. Can be freely changed. In addition, the number of pieces 14 attached to the base 12 can be freely changed according to the number of tools attached to the tool post to be attached. Therefore, the tool aligning device 60 has an advantage that the tool aligning operation can be carried out with one tool aligning device 60 for various tool rests having different tool mounting positions and numbers.
[0026]
The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications and changes can be made. For example, as long as the piece member is configured to be supported by the base body so as to be independently displaceable, various support structures such as a sliding type and an elevating type are adopted in addition to the pivotal support structure described above. Can do. As one of such modifications, FIG. 10 shows a piece member 70 that is slidably supported by the support portion 22 of the base 12.
[0027]
The piece member 70 integrally includes a sliding portion 74 having a through groove 72 capable of receiving the pivot 24 and a pair of flat arm portions 76 and 78 extending in parallel in one direction from the sliding portion 74. Prepare. The sliding portion 74 of the piece member 70 is accommodated in the rectangular notch 26 of the support portion 22 in a state where the pivot 24 is received in the through groove 72. A stopper 80 that holds the pivot 24 in the through groove 72 is fixedly installed in the arm side opening of the through groove 72. The upper arm portion 76 of the piece member 70 has a substantially rectangular flat main surface 76a and a flat back surface 76b opposite to the main surface 76a. The back surface 76 b of the arm portion 76 is slidably in contact with the main surface 22 a of the support portion 22 of the base 12. Further, the lower arm portion 78 of the piece member 70 has a flat sliding surface 78 a that slidably contacts the back surface 22 b of the support portion 22. Accordingly, the piece member 70 is configured to freely slide linearly in the direction defined by the pivot 24, the through groove 72, and both arm portions 76, 78 on the support portion 22 of the base body 12.
[0028]
The main surface 76a of the arm portion 76 above the piece member 70 has a tool 42 on the tool rest when the piece member 70 is disposed at a position where the pivot 24 is adjacent to the bottom of the through groove 72 (FIG. 10A). This acts as an alignment surface 76a that can be in contact with the blade edge 42a and can position the blade edge 42a at a predetermined position. At this time, the alignment surface 76a is disposed at the operating position. Further, when the piece member 70 slides and displaces in the right direction in FIG. 10 from the operating position, and the cutting edge 42a of the tool 42 cannot be contacted, the alignment surface 76a is disposed at the non-operating position (FIG. 10). (B)). If the base member 12 supports a plurality of the piece members 70 having such a configuration and the alignment surfaces 76a of the arm portions 76 are arranged on the substantially same plane at the working position, the above-described tool is obtained. It will be understood that the same effects as the aligning device 10 can be obtained.
[0029]
【The invention's effect】
As is clear from the above description, according to the present invention, in the tool aligning device for aligning the cutting edge positions of a plurality of tools mounted on the tool post of the machine tool, among the plurality of tools that have already aligned the cutting edge positions. When replacing any of the above, the cutting edge of a new tool can be easily aligned with another tool without damaging the cutting edge of another tool that does not require replacement.
[Brief description of the drawings]
FIG. 1 is a front view of a tool aligning device according to a first embodiment of the present invention.
FIG. 2 is a plan view of the tool aligning device of FIG.
FIG. 3 is a bottom view of the tool aligning device of FIG. 1;
4 is a partial cross-sectional side view of the tool aligning device of FIG. 1;
5 is a cross-sectional view taken along line V-V of the main part of the tool aligning apparatus of FIG. 1, in which (a) the alignment surface of the piece members is in the operating position, and (b) the alignment surface of the piece members is The state in the non-acting position is shown.
6 is a front view showing the tool aligning device of FIG. 1 attached to a comb-tooth tool post of a lathe. FIG.
7 is a side view of the tool aligning device and the comb tool post of FIG. 6;
FIG. 8 is a front view of a tool aligning device according to a second embodiment of the present invention.
FIG. 9 is a bottom view of the tool aligning device of FIG. 8;
FIGS. 10A and 10B are cross-sectional views corresponding to FIG. 5 of a piece member according to a modification, in which FIG. 10A is a state in which the piece member alignment surface is in the operating position, and FIG. Indicates.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10, 60 ... Tool aligning device 12 ... Base | substrate 14, 70 ... Piece member 16 ... Knob bolt 16d, 19a ... Tapered surface 18 ... Mounting part 18a, 18b ... Mounting surface 22 ... Supporting part 24 ... Axis 26, 62 ... Rectangular notch 36 ... Axis 38, 76, 78 ... Arms 38a, 76a ... Alignment surface 40 ... Comb tooth blade 42 ... Bit 42a ... Cutting edge 64 ... O-ring

Claims (6)

In a tool aligning device for aligning the cutting edge positions of a plurality of tools mounted on a tool post of a machine tool,
A base body fixedly arranged with respect to the tool post;
A plurality of piece members supported by the base body so as to be independently displaceable,
Each of the plurality of piece members has an alignment surface that can be displaced between an operating position where the cutting edge of the tool on the tool post can be contacted and a non-operating position where the cutting edge cannot be contacted. Tool alignment device. The tool alignment apparatus according to claim 1, wherein the alignment surfaces of the plurality of piece members are arranged on substantially the same plane at the operation position. The tool aligning device according to claim 1 or 2, wherein the plurality of piece members are rotatably supported by the base body. The tool aligning device according to claim 3, wherein the plurality of piece members have substantially the same rotation axis. The tool aligning apparatus of any one of Claims 1-4 which can change each arrangement | positioning of these several piece members on the said base | substrate. The tool aligning device according to any one of claims 1 to 5, wherein the base includes an attachment portion that attaches the base to the tool rest in a predetermined posture.

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