JP2009208203A - Attachment nut of tool holder and attachment structure of the tool holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment nut of a tool holder and an attachment structure of the tool holder, capable of fixing the tool holder to a tool rest with a simple work and efficiently, and with high positioning accuracy. <P>SOLUTION: The attachment nut of the tool holder is inserted and fixed to a T-groove 111 formed on the tool rest 110, for fixing a tool holder 120, with a processing tool 121 mounted thereon, to the tool rest 110. The attachment nut 130 has a means for defining a relative position with the tool rest 110 and a means for defining the relative position between the attachment nut 130 and the tool holder 120. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mounting nut inserted into a T-slot for positioning and fixing a tool holder to a tool post having a T-slot of a machine tool, and a tool holder mounting structure.

Conventionally, as shown in FIGS. 9 and 10, as a structure for attaching a tool holder to a tool post in a machine tool, a tool holder 520 is generally positioned and fixed to a tool post 510 using a mounting bolt 540 and a mounting nut 530. Known to.
The tool post 510 has a T-groove 511 formed on the mounting surface 512 to which the tool holder 520 is mounted, the tool holder 520 holds the machining tool 521, and the mounting bolt 540 passes through the mounting hole 522 of the tool holder 520 and is screwed with the mounting nut 530. The mounting nut 530 is screwed with the mounting bolt 540 and inserted into the T groove 511.
In order to perform positioning and fixing firmly, two T-grooves 511 are provided, and attachment holes 522, attachment bolts 540, and attachment nuts 530 are provided for the respective T-grooves 511.

  Then, the mounting bolt 540 is inserted into the mounting hole 522 of the tool holder 520 from above and protrudes downward, and the mounting nut 530 is inserted into the T groove 511 from the side of the tool post 510 with the mounting nut 530 screwed. After the tool holder 520 is slid onto the mounting surface 512 of the tool post 510 to a predetermined position, the tool holder 520 is positioned and fixed on the tool post 510 by tightening the mounting bolt 540.

In order to perform accurate positioning in the fixing means using such a T-groove, the position to be fixed is determined using a measuring instrument or jig, or accurate using a control function or a detection function provided in a machine tool. Work such as determining the position has been performed (for example, see Patent Documents 1 and 2).
Japanese Utility Model Publication No. 57-91529 (first page, FIG. 2, FIG. 3) Japanese Patent No. 2543001 (2nd page, FIG. 9)

In such a conventional tool holder mounting structure of a machine tool, an additional work for positioning occurs every time a machining tool is replaced or changed, resulting in lower work efficiency and lower positioning accuracy. There was a problem.
In particular, when attaching a plurality of tool holders to a single tool post, it is necessary to position and fix the tool holders one by one, which is extremely complicated, and the layout of multiple tools (relative positional relationship) It is extremely difficult to maintain the positioning accuracy at a high level every time the change is made.

  The invention according to claim 1 is a tool holder mounting nut that is inserted into and fixed to a T-groove formed in the tool post, and for fixing a tool holder to which a processing tool is mounted, to the tool rest. The object is solved by having a position defining portion that is positioned at a predetermined position with respect to the tool post and a positioning portion that positions the tool holder at a predetermined position with respect to the mounting nut. To do.

  In the invention according to claim 2, in addition to the structure of the mounting nut described in claim 1, the position defining portion is for fixing the end surface of the mounting nut and the end surface of the tool rest in the same plane. The problem is solved by the end face screw hole.

  In the invention according to claim 3, in addition to the structure of the mounting nut according to claim 1 or 2, the positioning portion engages with a locking portion provided in the tool holder. The above-mentioned problem is solved by comprising.

  The invention according to claim 4 includes, in addition to the structure of the mounting nut described in any one of claims 1 to 3, the mounting nut includes a fixing unit that fixes the tool holder, The said subject is solved by making the relative position of this fixing means and the said positioning part into a different relative position for every said tool holder.

  In addition to the configuration of the mounting nut described in any one of claims 1 to 4, the invention according to claim 5 is provided with a plurality of positioning portions so as to position the plurality of tool holders. Thus, the above-described problems are solved.

The invention according to claim 6 includes a tool rest in which a T-slot is formed, a tool holder to which a processing tool is mounted, and a mounting nut to be inserted into the T-slot, and is inserted into the T-slot and the tool is inserted. In the mounting structure of the tool holder for attaching the tool holder to the mounting nut fixed to a table and fixing the tool holder to the tool post,
Between the tool post and the mounting nut, there is a position defining means for positioning the position of the mounting nut with respect to the tool post,
Positioning means for positioning the tool holder at a predetermined position relative to the mounting nut between the mounting nut and the tool holder;
The problem is solved by positioning and attaching the tool holder by positioning means to the mounting nut positioned and fixed to the tool post by the position defining means.

  In the invention according to claim 7, in addition to the structure of the mounting structure described in claim 6, the position defining means includes a contact plate that fixes the end surface of the mounting nut and the end surface of the tool post in the same plane. The end face screw hole provided in the end face of the tool post and the end face screw hole provided in the end face of the mounting nut, and a fixing bolt for fixing the contact plate to the both end face screw holes. It is a solution.

  According to an eighth aspect of the present invention, in addition to the structure of the mounting structure described in the sixth or seventh aspect, the positioning means includes a locking portion provided in the tool holder, the locking portion, The above-described problems are solved by the engagement portion formed on the mounting nut so as to be engaged.

  According to the ninth aspect of the present invention, in addition to the structure of the mounting structure according to the eighth aspect, the mounting nut has a fixing means for fixing the tool holder, and the fixing means and the engaging portion The said subject is solved by making a relative position into a different relative position for every said tool holder.

  In the invention according to claim 10, in addition to the structure of the mounting structure according to any one of claims 6 to 9, a plurality of the engaging portions are provided in the T-groove direction of the mounting nut. And the said subject is solved by attaching the said tool holder in multiple numbers to the said tool rest.

  In the invention according to claim 11, in addition to the structure of the attachment structure described in claim 10, the attachment nut has a plurality of engaging portions for positioning a plurality of tool holders, The said subject is solved by preparing the said attachment nut from which the arrangement pattern of an engaging part differs is prepared.

  In the mounting nut of the invention according to claim 1, the mounting nut is positioned and fixed at a predetermined position with respect to the tool post by the position defining portion, and the tool holder is predetermined with respect to the mounting nut by the positioning portion. By positioning and fixing to the tool position, the positions of the tool post and the tool holder are defined, so that the tool holder can be fixed to the tool post with simple and efficient and high positioning accuracy. By preparing a mounting nut that matches the machining conditions in advance, it is possible to easily change the machining tool layout and the like with high positioning accuracy and to improve the reproducibility of the layout.

  In the mounting nut of the invention according to claim 2, in addition to the effect achieved by the mounting nut according to claim 1, the position defining portion fixes the end surface of the mounting nut and the end surface of the tool rest in the same plane. By simply inserting the mounting nut into the T-slot and fixing it to the end of the tool rest with a backing plate, etc., the mounting nut can be accurately fixed relative to the tool rest. Fixing the relative position between the nut and the tool post is a very simple task.

  The mounting nut of the invention according to claim 3 is an engagement in which the positioning portion engages with a locking portion provided in the tool holder, in addition to the effect exhibited by the mounting nut according to claim 1 or 2. By comprising the portion, when the mounting nut and the tool holder are positioned after the mounting nut is fixed to the tool post, the tool holder can be set easily and accurately, and the positioning and fixing of the tool holder is further simplified.

  The mounting nut of the present invention according to claim 4 has a fixing means for fixing the tool holder, in addition to the effect of the mounting nut according to any one of claims 1 to 3, Selection of the tool holder because the position of the fixing means differs when the type of the tool holder fixed to the mounting nut is wrong because the relative position of the fixing means and the engaging portion is different for each tool holder. Mistakes can be prevented.

  In addition to the effect of the mounting nut according to any one of claims 1 to 4, the mounting nut of the invention according to claim 5 includes a plurality of positioning portions so as to position a plurality of tool holders. Therefore, even when a plurality of tool holders are attached to the tool post, positioning and fixing can be accurately performed simultaneously.

  In the mounting structure of the present invention according to claim 6, the position of the mounting nut is defined with respect to the tool post by the nut position defining means, and the positions of the mounting nut and the tool holder are defined by the positioning means. The tool holder can be fixed at a predetermined position of the tool post with a simple operation, efficiently and with high positioning accuracy.

  In the mounting structure according to the seventh aspect of the invention, in addition to the effect produced by the mounting structure according to the sixth aspect, the position defining means fixes the end surface of the mounting nut and the end surface of the tool rest in the same plane. An end face screw hole provided in an end face of the tool post, an end face screw hole provided in an end face of the mounting nut, and a fixing bolt for fixing the hit plate to both end face screw holes. By simply inserting the mounting nut into the T-groove and fixing it to the end face of the tool post with a contact plate or the like, the mounting nut can be accurately fixed relative to the tool post. Fixing the position is a very simple task.

  The mounting structure of the present invention according to claim 8 is characterized in that, in addition to the effect of the mounting structure according to claim 6 or 7, the positioning means includes a locking portion provided in the tool holder, and the locking portion. It is easy and accurate to set the mounting nut and tool holder after positioning the mounting nut to the tool post by engaging with the engaging part formed on the mounting nut to engage. This makes it easier to position and fix the tool holder.

  The attachment structure of the invention according to claim 9 has the fixing means for fixing the tool holder, in addition to the effect exerted by the attachment structure according to claim 8, and the fixing means and the engaging portion Since the relative position of the tool holder is different for each tool holder, the position of the fixing means will be different if the type of the tool holder fixed to the mounting nut is wrong. it can.

  In the mounting structure of the invention according to claim 10, in addition to the effect exerted by the mounting structure according to any of claims 6 to 9, a plurality of engaging portions are provided in the T-groove direction of the mounting nut. Thus, the plurality of tool holders can be positioned and fixed easily and with high accuracy.

  In the mounting structure of the invention according to claim 11, in addition to the effect of the mounting structure according to claim 10, the mounting nut has a plurality of engaging portions for positioning and fixing a plurality of tool holders, By preparing multiple mounting nuts with different arrangement patterns of engaging parts, it is possible to select multiple mounting nuts that match the machining conditions when changing or replacing the tool holder. The tool holder can be positioned and fixed easily and with high accuracy, and the reproducibility of the layout is improved.

First, a tool holder mounting nut and a tool holder mounting structure according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the tool holder mounting structure according to the first embodiment of the present invention positions and fixes a tool holder 120 on which a processing tool 121 for processing a workpiece is mounted on a tool rest 110 of a machine tool or the like. The tool post 110 has a T-groove 111 formed on the mounting surface 112 to which the tool holder 120 is attached, and the tool holder 120 is attached to the mounting nut 130 inserted into the T-groove 111 via the mounting bolt 140. It has become.

  The nut body 131 of the mounting nut 130 is long and has a T-shaped cross-sectional shape that is the same as that of the T-groove 111 so that the nut body 131 can be inserted into the T-groove 111 from the end surface of the tool post 110 and cannot be detached in the direction of the mounting surface 112. The nut main body 131 is formed with a screw hole 132 that is screwed with the mounting bolt 140, and the nut main body 131 is screwed with the fixing bolt 151 that fixes the contact plate 150. An end face screw hole 134 is provided.

Further, a tool post end face screw hole 113 to be screwed with the fixing bolt 151 is provided on the end face of the tool rest 110 in the vicinity of the end of the T groove 111.
As shown in FIG. 2, the tool holder 120 is provided with a mounting hole 122 into which the mounting bolt 140 is inserted, and is provided with an abutting stopper 124 for abutting against the end surface of the tool rest 110 at the bottom of the front surface.
Further, the tool holder 120 is provided with a protruding engaging portion 123 on the bottom surface, and the nut body 131 is provided with a concave engaging portion 133 that engages with the engaging portion 123.

After the mounting nut 130 is inserted into the T-groove 111 of the tool post 110, the fixing bolt 151 is screwed into the tool post end face screw hole 113 and the end face screw hole 135 of the mounting nut 130 from the outside of the backing plate 150. The nut body 131 is fixed to the tool rest 110 with the end face 134 of the nut body 131 and the end face of the tool rest 110 aligned.
Thereby, the mounting nut 130 is positioned and fixed to the tool post 110 with the end face 134 as a reference.

The tool holder 120 is positioned and mounted on the mounting surface 112 of the tool rest 110 by bringing the stopper 124 into contact with the end of the tool rest 110 and engaging the engaging portion 123 with the engaging portion 133 of the mounting nut 130. Placed.
The engaging portion 133 is formed at a position where the engaging portion 133 engages with the locking portion 123 at a predetermined position with respect to the tool post 110 of the tool holder 120 with the end face 134 as a reference.
The screw hole 132 is provided so that the stopper 124 and the end of the tool rest 110 come into contact with each other, and when the engaging portion 123 and the engaging portion 133 are engaged with each other, the screw hole 132 is aligned with the mounting hole 122.

  The tool holder 120 is fixed by inserting a mounting bolt 140 into the mounting hole 122 of the tool holder 120 and screwing it into the screw hole 132 and tightening it, and is positioned and mounted at a predetermined position with respect to the tool post 110. It is done. (See FIG. 3).

In the first embodiment, there is one locking portion 123 on the bottom surface of the tool holder 120 and the engaging portion 133 is provided on only one of the two mounting nuts 130. However, the size of the tool holder, Depending on the shape or the like, a plurality of locking portions 123 may be provided, and the engaging portions 133 may be provided on both of the mounting nuts 130, or may be provided at a plurality of locations on each of the mounting nuts 130.
Further, the tool holder 130 is provided with two mounting holes 122 corresponding to each mounting nut 130, and the tool holder 130 is fixed to each mounting nut 130 with one mounting bolt 140. However, a plurality of mounting holes 122 and mounting bolts 140 may be provided for each mounting nut 130 according to the size, shape, etc. of the tool holder.

Furthermore, the number of T grooves 111 formed in the tool rest 110 may be one or two or more. When there are a plurality of T grooves 111, the mounting nut 130 described above is provided in at least one T groove 111. As long as is inserted.
Either the locking part 123 or the engaging part 133 may be convex, and the cross-sectional shape thereof may be any.
The relative positions of the screw holes 132 and the engaging portions 133 can be different relative positions for a plurality of tool holders. In this case, when the type of the tool holder to be fixed to the mounting nut 130 is wrong, the screw hole 132 and the mounting hole of the tool holder are different in position, so that it is possible to prevent an error in mounting the tool holder.

Next, a machine tool to which the above-described tool holder mounting structure is applied will be described with reference to FIGS.
The machine tool 300 holds a spindle base 303 that rotatably supports a spindle 302 that grips a workpiece W on a gantry 301, and a plurality of machining tools 221 via a tool holder 220 corresponding to each machining tool. The tool rest 210 and the tool rest 220 and the tool rest 220 are arranged so that the workpiece W and the processing tool 221 face each other.
The machine tool 300 performs various processing on the workpiece W with the processing tool 221 by relatively moving the headstock 303 and the tool rest 220 in two directions orthogonal to each other by the head stock table 304 and the tool rest table 305, respectively. Can be applied.

Each tool holder 220 is positioned and fixed on the tool post 210 at a predetermined position corresponding to a machining operation or the like.
When the workpiece W or machining operation is changed, the tool holder 220 is exchanged or its position is changed.

The tool post 210 has a length to which a plurality of tool holders 220 can be attached, and the nut main body 231 of the mounting nut 230 inserted into the T groove 211 of the tool post 210 is substantially the same length as the tool post 210. A plurality of engaging portions 233 and screw holes 232 are formed on the upper surface so that the plurality of tool holders 220 can be positioned and fixed.
As in the case of the tool holder 120 described above, each tool holder 220 has a locking portion formed in a protruding shape or a recessed shape, and the engaging portion 233 of the nut body 231 has a recessed shape or a protruding shape that faces the locking portion. It is formed in a shape.
On the end surfaces of the tool post 210 and the nut main body 231, as with the tool post 110 and the nut main body 131, there are a tool post end face screw hole 213 and an end face screw hole 234 that are screwed with a fixing bolt 251 for fixing the backing plate 250. Is provided.

Similarly to the tool holder 110 described above, each tool holder 220 is formed with a mounting hole 222 into which the mounting bolt 240 is inserted, and is provided with a contact stop 224 that stops the end face of the tool post 210 at the bottom of the front surface. Each tool holder 220 is positioned and fixed to the mounting nut 230 positioned and fixed to the tool post 210 by the contact plate 250 in an arrangement corresponding to the engaging portion 233 of the nut main body 231.
Then, by positioning and fixing each tool holder 220, the processing tool 221 mounted on each tool holder 220 is laid out in a predetermined arrangement on the tool post 210.

In the above operation, as shown in FIGS. 6 and 7, the two tool holders 220 on the left side of the figure have the same number and the same mounting holes 222 and can be fixed at any position with respect to the screw hole 232. However, since the shape of the engaging portion 233 is different, the engaging portion 233 does not match when placed and the attachment position is not mistaken.
However, the relative positions of the engagement portions 233 and the screw holes 232 corresponding to the engagement portions 233 can be different relative positions for each tool holder. In this case, if the type of the tool holder fixed to the mounting nut 230 is wrong, the positions of the screw hole 232 and the mounting hole of the tool holder are different, so that an installation error of the tool holder can be prevented.

Further, the layout of the processing tool 221 is determined in advance according to the workpiece W, the processing work, etc., and the nut main body 231 has the engaging portion 233 according to the predetermined layout of the processing tool 221. Is provided. By attaching the mounting nut 230 to the T-groove 211 of the tool post 210, the tool holder 220 can be easily arranged in a predetermined layout, so that the processing tool 221 can be easily set to a necessary layout.
For this reason, the layout of the processing tool 221 can be easily changed by preparing in advance a plurality of mounting nuts 230 having different arrangements of the engaging portions 233.

The mounting nut 231 is positioned by the abutting plate 250 so that the end surface of the tool post 210 and the end surface of the mounting nut 231 coincide with each other, and the tool holder 220 is positioned by the stopper portion 224 and the engaging portion 233. The repeated positioning of the tool 221 can be performed with high accuracy.
For example, when the workpiece W, the machining operation, or the like is changed and the layout of the machining tool 221 is changed, a mounting nut 230 in which the engaging portion 233 and the screw hole 232 are arranged is prepared in advance according to the layout. After removing the mounting nut 230 used in the immediately preceding machining from the T-groove 211, the mounting nut 230 prepared for the layout change is attached to the T-groove 211, and the tool holder 220 is positioned and fixed. The layout can be easily changed.

According to the tool holder mounting nut and the tool holder mounting structure of each of the above embodiments, it is possible to lay out the processing tool by positioning and fixing the tool holder to the tool post with high positioning accuracy with high efficiency and simple operation. Therefore, there is no need to provide measuring tools and jigs for laying out processing tools and tool holders, and it is possible to greatly shorten the work time for changing and changing the position of processing tools when changing workpieces. .
Also, by repeatedly using the same mounting nut, the same layout of the machining tool can be easily reproduced with high accuracy, and the accuracy of the repeatability of the machining tool layout can be improved.

The relative positions of the tool holders 220 fixed to the mounting nut 230 maintain a predetermined relationship even when the mounting nut 230 is slid along the T groove 211. As described above, since the pitch between the tool holders 220 is determined by the mounting nut 230, the displacement of the fixing position of the mounting nut 230 with respect to the tool post 210 can be corrected on the machine tool side. If it is inserted in, it can also be fixed at an arbitrary position.
In each of the above embodiments, the tool holder is fixed to the mounting nut. However, the tool holder can be positioned on the mounting nut side, and the positioned tool holder can be fixed to the tool post.

Each of the above embodiments relates to the positioning and fixing of the tool holder with respect to the tool post. However, the mounting nut and mounting structure of the present invention can be any machine and structure as long as the mounting nut is inserted and fixed in the T-slot. Applicable to objects.
Moreover, although the member inserted into the T-groove is a mounting nut having a screw hole, a mounting bolt having a screw hole portion as a screw shaft may be used.

The perspective view explaining the attachment structure of the tool holder which is 1st Example of this invention. The perspective view which changed the angle of the tool holder of FIG. The perspective view of the state which completed the attachment of 1st Example of this invention. The top view of the machine tool to which the attachment structure of the tool holder which is 2nd Example of this invention is applied. The side view of the machine tool of FIG. The perspective view explaining the attachment structure of the tool holder which is 2nd Example of this invention. The perspective view of the state in the middle of attachment of 2nd Example of this invention. The perspective view of the state which completed the attachment of 2nd Example of this invention. The perspective view explaining the attachment structure of the conventional tool holder. Sectional drawing of FIG.

Explanation of symbols

110, 210, 510 ... Tool post 111, 211, 511 ... T-groove 112, 212, 512 ... Mounting surface 113, 213 ... Tool post end face screw hole 120, 210, 520 ... Tool Holders 121, 221, 521... Machining tools 122, 222, 522... Mounting holes 123,... Locking portions 124, 224. 231 ... Nut body 132, 232 ... Screw hole 133, 233 ... Engagement part 134, 234 ... End face 135, 235 ... End face screw hole 140, 240, 540 ... Mounting bolt 150 , 250 ・ ・ ・ Plate plate 151, 251 ・ ・ ・ Fixing bolt 300 ・ ・ ・ Machine tool 301 ・ ・ ・ Stand base 302 ・ ・ ・ Spindle 303 ・ ・ ・ Spindle base 304 ・ ・ ・ Spindle base tape Bull 305 ... Tool post table W ... Workpiece

Claims (11)

In the mounting nut of the tool holder for fixing the tool holder, which is inserted and fixed in the T-groove formed in the tool post and to which the processing tool is mounted, to the tool post,
The mounting nut has a position defining portion that is positioned at a predetermined position with respect to the tool post, and a positioning portion that positions the tool holder at a predetermined position with respect to the mounting nut. A mounting nut for the tool holder.   2. The tool holder mounting nut according to claim 1, wherein the position defining portion is an end surface screw hole for fixing the end surface of the mounting nut and the end surface of the tool post to the same plane.   The mounting nut for the tool holder according to claim 1 or 2, wherein the positioning portion is an engaging portion that engages with a locking portion provided in the tool holder.   4. The mounting nut includes fixing means for fixing the tool holder, and the relative positions of the fixing means and the positioning portion are different relative positions for the tool holders. The mounting nut of the tool holder as described in any one of these.   The tool holder mounting nut according to any one of claims 1 to 4, wherein a plurality of the positioning portions are provided so as to position the plurality of tool holders. A tool post on which a T-slot is formed, a tool holder on which a processing tool is mounted, and a mounting nut that is inserted into the T-slot, and the mounting nut that is inserted into the T-slot and is fixed to the tool post. In the mounting structure of the tool holder for attaching the tool holder and fixing the tool holder to the tool post,
Between the tool post and the mounting nut, there is a position defining means for positioning the position of the mounting nut with respect to the tool post,
Positioning means for positioning the tool holder at a predetermined position relative to the mounting nut between the mounting nut and the tool holder;
An attachment structure for a tool holder, wherein the tool holder is positioned and attached by the positioning means to the attachment nut positioned and fixed on the tool post by the position defining means.   The position defining means is provided on the end plate of the mounting nut and the end surface of the tool post in the same plane, the end surface screw hole provided in the end surface of the tool post, and the end surface of the mounting nut. The tool holder mounting structure according to claim 6, comprising an end surface screw hole and a fixing bolt for fixing the contact plate to both end surface screw holes.   The said positioning means consists of the latching | locking part provided in the said tool holder, and the engaging part formed in the said attachment nut so that this latching | locking part might be engaged. Item 8. A tool holder mounting structure according to Item 7.   The said mounting nut has a fixing means which fixes the said tool holder, The relative position of this fixing means and the said engaging part was made into the relative position which differs for every said tool holder. The tool holder mounting structure. A plurality of the engaging portions are provided in the T-groove direction of the mounting nut;
The tool holder attachment structure according to any one of claims 6 to 9, wherein a plurality of the tool holders are attached to the tool post.   The mounting nut has a plurality of engaging portions for positioning a plurality of tool holders, and a plurality of the mounting nuts having different arrangement patterns of the plurality of engaging portions are prepared. The tool holder mounting structure according to claim 10.

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