JP4941187B2 - Turning tool - Google Patents

Description

  The present invention relates to a turning tool provided with a cutting edge adjusting mechanism for adjusting the position of a cutting edge of a cutting edge tip.

  In a turning tool for detachably mounting a cutting edge tip, the cutting edge of the used cutting edge tip may be reground and reused. Naturally, the position of the cutting edge tip of the re-ground tip is retracted from the position of the cutting edge tip that has not been re-ground according to the number of times of re-grinding. For this reason, when mounting both a new and non-reground cutting edge tip and a reground cutting edge tip on the tool body, the position of the cutting edge of the new cutting edge tip is set to the position of the cutting edge of the new cutting edge tip. Must be aligned. As described above, as a method of adjusting the position of the edge of the reground cutting edge tip, a shim having a predetermined thickness is interposed between the cutting edge tip and the wall surface of the tip mounting groove for positioning the cutting edge tip. There is a way. The position of the blade edge is adjusted by changing the thickness of the shim and the number of intervening sheets (see, for example, Patent Document 1).

Alternatively, a dedicated tool main body is prepared for each re-grinding amount and the number of re-grinding of the cutting edge tip to be used, and adjustment of the position of the blade edge by the shim is omitted.
JP 2004-58224 A

  However, as in the invention described in Patent Document 1, changing the thickness of the shim and the number of intervening sheets in accordance with the blade edge adjustment amount is very troublesome and complicated. In addition, it is complicated to inventory-control various shims with different thicknesses according to the blade edge adjustment amount.

  In addition, when using a dedicated tool body for each regrind amount and number of regrinds of the cutting edge tip to be used, various tool bodies must be prepared for each regrind amount and number of regrinds. Management of the main body is also complicated.

  The present invention has been made in order to solve the above-described problem. When a new cutting edge tip that has not been reground and a reground cutting edge tip are both mounted on a tool body, It is an object of the present invention to provide a turning tool that can easily and accurately adjust the cutting edge to align the cutting edge position with the cutting edge position of a new cutting edge tip.

In order to solve the above problems, the present invention has the following configuration. The invention according to claim 1, the outer peripheral surface of the tool body is rotated about the axis, a plurality of chips mounted groove is 1 or more rows formed along the circumferential direction of the tool body, each of said chip mounting groove A rolling tool in which cutting tips having the same shape are attached to the bottom surface of the chip mounting groove so as to be detachably attached to the chip mounting groove for each row, and are the same in each row. The position of the bottom wall surface of at least one tip mounting groove in the row is a position protruding to the outer peripheral side of the tool body from the reference bottom wall surface of the tip mounting groove serving as a reference in the same row, and for each row. A rolling tool characterized in that the rotation trajectories of cutting edge tips overlap .

According to the first aspect of the present invention, at least one tip mounting groove among the plurality of tip mounting grooves provided in the tool main body of the rolling tool has a cutting edge of the cutting tip with respect to the other tip mounting grooves. The wall surface of the chip mounting groove, which is a positioning reference, is formed so as to be displaced by a predetermined amount in the adjustment direction of the blade edge (projecting in the outer peripheral direction of the tool body). The position of the cutting edge of the cutting edge tip can be adjusted by the predetermined amount without interposing a shim between the cutting edge tip mounted in the chip mounting groove. Therefore, the position of the blade edge can be adjusted easily and accurately.

The invention according to claim 2 is characterized in that a plurality of protrusion amounts of the bottom wall surface of the chip mounting groove from the reference bottom wall surface are set, and each protrusion amount is an integral multiple of the minimum protrusion amount. A turning tool according to claim 1.

  According to the present invention, at least one tip mounting groove among a plurality of tip mounting grooves provided in the tool body of the cutting tool is a reference for positioning the cutting edge tip of the cutting tip with respect to the other tip mounting grooves. The wall surface of the chip mounting groove is formed so as to be displaced by a predetermined amount in the adjustment direction of the cutting blade, and the wall surface of the chip mounting groove and the cutting edge chip mounted in the chip mounting groove It is possible to adjust the position of the cutting edge of the cutting edge tip by the predetermined amount without interposing a shim therebetween. Therefore, the position of the blade edge can be adjusted easily and accurately.

  A rotor gear cutter will be described with reference to the drawings as an embodiment of a turning tool to which the present invention is applied. FIG. 1 is a front view of the rotor gear cutter. FIG. 2 is a plan view of the rotor gear cutter shown in FIG. FIG. 3 is a right side view of the rotor gear cutter shown in FIG. 1, and FIG. 4 is a longitudinal sectional view for explaining the rotational shape of the cutting blade of the rotor gear cutter shown in FIG. FIG. 5 is a perspective view of a cutting edge tip having a right blade. FIG. 6 is a perspective view of a cutting edge tip having a left blade.

  As shown in FIGS. 1 to 3, the rotor gear cutting cutter is configured such that a cutting edge tip is mounted in a tip mounting groove of the tool body 1. In FIGS. 2 and 3, some of the chip mounting grooves are not equipped with cutting edge chips so that the wall surface of the chip mounting groove can be seen. As shown in FIG. 4, there are two types of cutting edge tips, and the cutting edge chip 100 having the right edge 103 is arranged to be biased toward one end surface of the tool body 1, and the left edge 203 is The cutting edge chips 200 are arranged biased on the other end surface side of the tool body 1 and are alternately mounted in the outer peripheral direction. The right blade 103 and the left blade 203 are formed such that a part of the rotation trajectory of each other overlaps to form a continuous cutting blade, and the cutting blade shape is substantially equal to the desired tooth profile of the rotor.

  The chip mounting grooves 10 and 20 in which the cutting edge chips 100 and 200 are mounted are formed by cutting out the outer peripheral surface of the tool body 1, the side wall surfaces 10 a and 20 a facing the rotation direction, and the radially outer side of the tool body 1. The bottom wall surfaces 10b and 20b and the side wall surfaces 10c and 20c are formed so as to face each other and are constrained by abutting and supporting the cutting edge chips 100 and 200 on these wall surfaces. A wedge member W that engages with the screw member N is inserted into the wedge member insertion grooves 11 and 21 adjacent to the front side in the tool rotation direction K of the chip mounting grooves 100 and 200, and the wedge member W is inserted by the screw member N. Is depressed toward the bottom wall surfaces 11b and 21b of the wedge member insertion grooves 11 and 21, whereby the cutting edge chips 100 and 200 are pressed and fixed in the chip mounting grooves 10 and 20, respectively, by a wedge action.

  The bottom wall surfaces 10b and 20b of the chip mounting groove are inclined with respect to the axis of the tool main body 1 and are biased by the cutting edge chips 100 and 200 mounted in the chip mounting grooves 10 and 20 as they go radially inward of the tool main body 1. The tool main body 1 is extended so as to gradually approach the end face side, and the extended length is relatively long, so that the cutting edge chips 100 and 200 are stably abutted and supported. Side wall surfaces 10c and 20c of the chip mounting groove are extended in a direction intersecting the bottom wall surfaces 10b and 20b, and abutment chips are brought into contact with and supported by the bottom wall surfaces 10b and 20b. In consideration of minimizing the notch of the tool body 1 and stably restraining the cutting edge tip, the angle formed between the bottom wall surface 10b, 20b and the side wall surface 10c, 20c is 30 ° to 150 °. The range is preferably 80 ° to 100 °, particularly preferably 90 °.

  The wedge member insertion grooves 11 and 21 also extend in substantially the same direction as the chip attachment grooves adjacent to the wedge member insertion grooves 11 and 21. Both the tip mounting groove and the wedge member insertion grooves 11 and 21 are configured such that their end portions are closed except for one end portion that opens to the outer peripheral side of the tool body 1.

  A cutting blade tip 100 having a right blade shown in FIG. 5 has a flat plate shape, and a right blade 103 is formed at the peripheral edge of the upper surface that becomes the rake face 101, and a side surface extending from the right blade 103 to the lower surface is a flank 102. It is said. The cutting edge chip 200 having the left blade illustrated in FIG. 6 is also formed in a flat plate shape, the left blade 203 is formed on the peripheral edge of the upper surface that becomes the rake face 201, and the side surface extending from the left blade 203 to the lower surface is a flank 202. It is said. When mounted in the chip mounting groove, each of the cutting edge chips 100 and 200 has the restrained surfaces 100b and 200b abutted and supported on the bottom wall surfaces 10b and 20b of the chip mounting groove corresponding to the bottom wall surfaces 10b and 20b. It is formed so as to gradually approach the end face side of the tool body 1 to which the cutting blade tips 100 and 200 are biased as it obliquely crosses the axis of the tool body 1 and goes radially inward of the tool body 1.

  Each of the cutting edge tips 100 and 200 is mounted on the tool body 1 and used for rotor gear cutting, and then is used again by regrinding the damaged cutting edge portion. The regrind is performed by grinding the flank surfaces 102 and 202 until the damage caused to the rake surfaces 101 and 201 is completely removed. In the present invention, the re-grinding amount per one time of each of the cutting edge chips 100B and 200B is managed uniformly without variation. Regarding the number of regrinds, if there is no restriction on the shape surface of the cutting edge tip, it can be repeated not only once but twice or three times or more.

  The re-ground cutting tips 100B and 200B retreat to the constrained surfaces 100b and 200b according to the amount of re-grinding, the number of re-grinding, etc. of the right blade 103 or the left blade 203. When the new cutting edge chips 100A and 200A that are not ground are mounted on the same tool body, the positions of the right blade 103 or the left blade 203 become uneven.

  In this rotor gear cutting cutter, chip mounting grooves 10A and 20A (chip mounting grooves marked with “1” on the end face of the tool body in FIG. 1) in which new cutting edge chips 100A and 200A are mounted are re-applied once. Chip mounting grooves 10B and 20B (chip mounting grooves marked with “2” on the end face of the tool body in FIG. 1) in which the ground cutting edge chips 100B and 200B are mounted, and a cutting edge chip 100C re-ground twice. Chip mounting grooves 10C and 20C (chip mounting grooves marked with “3” on the end face of the tool body in FIG. 1) are sequentially disposed on the rear side in the rotational direction of the cutter.

  Further, in the chip mounting grooves 10B, 20B, 10C, and 20C in which the reground cutting edge chips 100B, 200B, 100C, and 200C are mounted, the bottom wall surfaces 10b and 20b that serve as positioning reference for the cutting edges are new cutting edge chips. With reference to the bottom wall surfaces 10b and 20b of the chip mounting grooves 10A and 20A in which 100A and 200A are mounted, a predetermined amount is displaced in a direction orthogonal to the bottom wall surfaces 10b and 20b corresponding to the amount of retraction of the cutting edge by regrinding. Is formed.

  According to the rotor gear cutting cutter having the above-described configuration, the new cutting edge chips 100A and 200A and the re-ground cutting edge chips 100B, 200B, 100C, and 200C are dedicated chip mounting grooves 10B and 20B corresponding to the cutting edge chips. By attaching to 10C and 20C, the positions of the blade tips of the respective cutting edge tips 100, 200, 100A, and 200A are accurately aligned. Therefore, in addition to effective use of the cutting edge tip, there is no need for adjusting means such as interposing a shim between the bottom wall surface 11b, 21b of the tip mounting groove and the cutting edge tip attached to the chip mounting groove. Therefore, the re-ground cutting edge tip can be quickly mounted on the tool body 1, and the position of each cutting edge of the new cutting edge tips 100A, 200A and the re-ground cutting edge tips 100B, 200B, 100C, 200C. Are accurately aligned.

  In a rolling tool that mounts multiple cutting edges with the same amount of retraction by re-grinding, there is no need for shims to align the position of the cutting edge during mounting, but the amount of re-grinding and re-processing per time A dedicated tool body must be prepared for each cutting edge tip having a different number of times of grinding, and the management of the tool body becomes complicated. On the other hand, in this rotor gear cutting cutter, when a plurality of cutting edge tips with different cutting edge retraction amounts due to regrinding are mounted on the tool body, the position of the cutting edge of each cutting edge tip can be aligned. The problem does not occur.

  Further, this rotor gear cutting cutter is equipped with the same number of new cutting edge chips 100A, 200A, cutting blade chips 100B, 200B re-ground, and cutting blade chips 100C, 200C re-ground twice. Therefore, the re-ground cutting edge tip can be reused with one tool body. That is, after being used for cutting, each mounted cutting edge tip is re-ground, and the re-ground cutting tip is mounted in a dedicated chip mounting groove according to the number of re-grinding and used again. Only a new cutting edge tip needs to be refilled. Therefore, the re-ground cutting edge tip can be reliably reused, and the replacement operation of the cutting edge tip can be performed very easily.

  In addition, this rotor gear cutting cutter is provided with new chip inserts and dedicated chip mounting grooves corresponding to each number of regrinds at substantially equal intervals along the circumferential direction of the tool body. Therefore, only new cutting edge chips 100A and 200A or only cutting edge chips having the same number of regrinds can be mounted in the corresponding chip mounting grooves. When comprised in this way, the cutting-edge chip | tip from which the amount of re-grinding per one time and the number of times of re-grinding differ by one tool main body can be used, and aggregation of a tool main body can be taken.

  As described above, according to the present invention, the amount of regrinding per cutting edge tip is controlled to be constant, and a plurality of cutting edge tips with different numbers of regrinding are mounted in the dedicated tip mounting grooves, thereby enabling each cutting edge to be cut. The present invention is not limited to the embodiment in which the positions of the blade tips of the blade tips are aligned. For example, when a relatively large variation occurs in the amount of damage occurring on the rake face 101, 201 between a plurality of cutting edge tips, the plurality of cutting edge tips are separated into a plurality of groups according to the magnitude of the damage amount. In addition, the position of the cutting edge of each cutting edge tip is managed by managing the re-grinding amount per time for each group and mounting a plurality of cutting edge tips with different re-grinding amounts in the dedicated tip mounting groove. It is good also as a form which arranges.

  Furthermore, the number of regrinds is not limited to 2 times, and if there is no restriction, a form in which a re-ground tip that has been reground 3 times or more can be mounted.

It is a front view of the rotor gear cutter which applied this invention. It is a top view of the rotor gear cutting cutter shown in FIG. FIG. 3 is a right side view of the rotor gear cutter shown in FIG. 1. It is a figure explaining the cutting blade rotation shape of the rotor gear cutting cutter shown in FIG. It is a perspective view of the cutting-edge chip | tip which has a right blade. It is a perspective view of the cutting-edge chip | tip which has a left blade.

Explanation of symbols

1 Tool body 10, 20 Tip mounting groove 10A, 20A Tip mounting groove 10B, 20B, 10C, 20C for mounting a new cutting edge tip Tip mounting groove 10b, 20b for mounting a re-ground cutting edge tip Bottom of chip mounting groove Wall surface 11, 21 Wedge member insertion groove 11b, 21b Bottom wall surface 100, 200 of wedge member insertion groove Cutting tip 100A, 200A New cutting tip 100B, 200B, 100C, 200C Re-ground cutting tip 100b, 200b Tip mounting Side surface 103 of the cutting edge tip contacting the bottom wall surface of the groove Right blade 203 Left blade

Claims (2)

A plurality of chip mounting grooves are formed in one or more rows along the circumferential direction of the tool body on the outer peripheral surface of the tool body rotated around the axis,
For each row of the chip mounting grooves, a cutting tool having the same shape of the cutting edge tip is detachably mounted on the chip mounting groove by contacting the same side surface with the bottom wall surface of the chip mounting groove ,
In each row, the position of the bottom wall surface of at least one tip mounting groove in the same row is a position protruding to the outer peripheral side of the tool body from the reference bottom wall surface of the tip mounting groove serving as a reference in the same row. A rolling tool in which rotation trajectories of cutting edge tips overlap each other in each row . Plural types of protrusion amounts from the reference bottom wall surface of the bottom wall surface of the chip mounting groove are set,
The rolling tool according to claim 1, wherein each protrusion amount is an integral multiple of the minimum protrusion amount .

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