JP2010149241A - Cutting tool repolishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool repolishing device inexpensive in production cost and enabling stable and uniform polishing work with less time required for polishing work per one cutting tool. <P>SOLUTION: The cutting tool repolishing device 100 is provided with: a dividing rotational table 1; a plurality of fixing and supporting means 3 fixing and supporting a plurality of cutting tools 9 mounted on the dividing rotational table 1 to the dividing rotational table 1; and a projection nozzle 2 projecting polishing liquid 8 to the cutting tools. The plurality of cutting tools 9 are repolished by repeating a process of projecting the polishing liquid to the cutting tools 9 and repolishing a predetermined number of the cutting tools 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting tool re-polishing apparatus, and more particularly to a throw-away tip re-polishing apparatus.

  The throw-away tip, which is a replaceable cutting tool, is usually re-polished and used multiple times each time the sharpness drops. As the throw-away tip, for example, as shown in Patent Document 1, the surface including the rake face 9a has a triangular shape (for example, one side D is 12 mm), and has a thickness (flank 9b direction) of 3 to 3. The thing of about 5 mm is used (refer FIG. 5). Then, the re-polishing is performed on three rake faces 9a at the tip of the triangle.

  Conventionally, for example, re-polishing is performed by the method described in Patent Document 2. That is, honing polishing is performed by mounting the throw-away tip on the polishing holder and revolving the polishing brush while rotating the throw-away tip. When simultaneously polishing a plurality of throw-away tips by this method, the same number of polishing holders are required. This polishing holder has a large outer shape and a high manufacturing cost.

  Further, since the polishing is performed while rotating the throw-away tip, the time required for the polishing process becomes longer. Further, since the honing polishing process is performed using the polishing brush, the polishing tends to be uneven due to deformation wear of the polishing brush due to long-term use. To prevent this, it is necessary to periodically replace the polishing brush.

Japanese Utility Model Publication No. 57-50164 JP-A-9-239646

  The present invention has been made in view of the above problems, and its purpose is to shorten the time required for polishing processing per cutting tool, to perform stable polishing without unevenness, and to reduce cutting costs at low manufacturing costs. A polishing apparatus is provided.

The present invention provides a cutting tool re-polishing apparatus according to each of the claims as means for solving the problems.
According to the invention described in claim 1, the cutting tool re-polishing apparatus (100) of the present invention includes an indexing rotary table (1) and a plurality of cutting tools installed on the indexing rotary table (1). A plurality of fixed support means (3) for fixing and supporting (9) on the indexing rotary table (1), and a projection nozzle (2) for projecting a polishing liquid (8) onto the cutting tool, Repetitively polishing a plurality of the cutting tools (9) by repeating the step of re-polishing a predetermined number of the cutting tools (9) by projecting the polishing liquid (8) onto the tool (9). To do.

  Since the polishing liquid (8) is projected onto the cutting tool and a plurality of portions of the predetermined number of cutting tools (9) are simultaneously re-polished, there is no need to rotate the cutting tool (9), and the polishing quality is constant and high quality. Can be obtained in a short time. And since the process of re-polishing a predetermined number of cutting tools (9) is repeated and the plurality of cutting tools (9) are re-polished, the manufacturing cost of the cutting tool re-polishing apparatus (100) can be kept low. Thus, the quality of polishing is also constant.

According to the second aspect of the present invention, in the cutting tool re-polishing apparatus (100) of the present invention, the cutting tool (9) has a polygonal shape, and the re-polishing portion of the cutting tool (9) (9a) is in the vicinity of the vertex of the polygon, and the fixed support means (3) is provided with a polygonal pyramid (3a) on its upper part,
The polygonal pyramid (3a) re-adjusts the cutting tool (9) so that each side surface of the polygonal pyramid guides the polishing liquid (8) to each of the re-polishing points (9a) of the cutting tool (9). The fixed support means (3) is fixed to the rotary table (1) so as to be positioned with respect to the polishing location (9a).

  With this structure, when the projection of the polishing liquid (8) starts, it is guided to the side surface (3a) of the polygonal pyramid (3a) of the fixed support means (3), and evenly diverts and runs down to the cutting tool. It collides evenly with the multiple re-polishing locations (9a) of (9). Thereby, a plurality of re-polishing portions (9a) included in the cutting tool (9) can be re-polished evenly at the same time.

  According to invention of Claim 3, the cutting tool re-polishing apparatus (100) of this invention is formed with the recessed part which transcribe | transferred the external shape of the said cutting tool (9) in the said rotary table (1). The cutting tool (9) is housed and installed in the recess, and the fixed support means (3) is formed with the polygonal pyramid (3a) at the upper part and the cylinder (3b) at the lower part, and the cylinder (3b). Is formed with a flat portion (3c) along the axial direction, and the rotary table (1) is further provided with a groove, and an inner surface of the groove is in contact with the flat portion (3c), The position in the circumferential direction (F) of the fixed support means (3) is determined.

  With this structure, the relative position between the cutting tool (9) and the polygonal pyramid (3a) can be determined, and the fixing support means (3) of the cutting tool (9) that can be easily attached and detached is provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a cutting tool re-polishing apparatus according to the present invention. FIG. 2 is a top view of the cutting tool re-polishing apparatus according to the present invention, and is a view of the cutting tool re-polishing apparatus according to the present invention as viewed from the direction A in FIG. FIG. 5A is a plan view of the throw-away tip to be re-polished, and FIG. 5B is a side view of the throw-away tip.

(First embodiment)
As shown in FIGS. 1 and 2, the cutting tool re-polishing apparatus 100 according to the first embodiment of the present invention is an apparatus for re-polishing a throw-away tip 9 that is a cutting tool. As shown in FIG. 5, the throw-away tip 9 is a plate-like object having a triangular outer shape. One side D of the triangle is, for example, 12 mm, and the plate thickness is, for example, 5 mm. A circular hole 9 c is formed at the center of the triangle of the throw-away tip 9. The hole 9c is precisely machined and has a predetermined diameter. The throw-away tip 9 has a rake face 9a at each apex of the triangle, and a flank face 9b in a direction substantially perpendicular to the rake face 9a. The rake face 9a has a cutting edge on the outer periphery thereof, and the regrind is performed on three rake faces 9a at the tip of the triangle.

  The cutting tool re-polishing apparatus 100 projects the polishing liquid 8 onto the rake face 9a of the throw-away tip 9 to re-polish a plurality of (for example, 16) throw-away tips 9, one per chip 9 by sequence control. Run continuously every time.

  As the polishing liquid 8, for example, a mixture of baked silica, colloidal silica (abrasive grains), amine (processing accelerator), organic polymer, or the like is employed. The colloidal silica is provided in the form of a transparent or opaque milky white colloid liquid in which the silicate fine particles are not aggregated and are dispersed as primary particles in water. The polishing liquid 8 is projected at high speed toward the rake face 9a of the chip 9 through the projection nozzle 2, and the rake face 9a is re-polished by the abrasive grains when the polishing liquid 8 collides with the rake face 9a. The The time for projecting the polishing liquid 8 is, for example, 15 seconds per throw-away tip.

  The cutting tool re-polishing apparatus 100 includes an indexing rotary table 1. On the indexing rotary table 1, there are formed, for example, sixteen recesses 1a that are roughly transferred by reversing the outer shape of the throw-away tip 9 in the circumferential direction at regular intervals. Is inserted (stored). As a result, the inserted chip 9 is blocked by the side wall of the recess 1a, so that it does not rotate in the circumferential direction (F direction in FIGS. 2 and 4). After the chip 9 is inserted into the recess 1 a of the turntable 1, it is fixed to the turntable 1 while being supported by the fixing pins 3.

  A motor M is installed under the rotary table 1 via a rotary shaft 7. A jack 5 is installed under the motor M via a pedestal 4. The motor M rotates the rotary table 1 via the rotary shaft 7 at a predetermined index angle, for example, 22.5 ° (360 ° / 16 pieces) every time re-polishing of one throw-away tip 9 is completed. The motor M is a servo motor for control, and a stepping motor may be adopted. The jack 5 is used to adjust the height position of the rotary table 1 from the ground. Various operations are performed using the dial 6.

  A projection nozzle 2 for projecting the polishing liquid 8 is installed on the rotary table 1. The distance of the projection nozzle 2 relative to the throw-away tip 9 can be adjusted. As shown in FIG. 1, the distance L between the projection nozzle 2 and the fixing pin 3 is adjusted to 30 mm, for example.

  3 and 4 show the fixing pin 3 which is a fixing support means of the chip 9. FIG. 3 is a side view of the fixing pin 3. FIG. 4 is a top view of the fixing pin 3, and is a view seen from the direction B in FIG. 3 and 4, the throw-away tip 9 is schematically represented by a virtual line. The relative positional relationship between the fixing pin 3 and the chip 9 in FIGS. 3 and 4 is that in which both are attached to the turntable 1. As shown in FIG. 3, the fixing pin 3 has a triangular pyramid 3a formed at the top and a column 3b formed at the bottom. The inclination angle C of the side surface with respect to the bottom surface of the triangular pyramid 3a is, for example, 30 °. On the cylinder 3b, two plane portions 3c are formed symmetrically with respect to the axis along the axial direction.

  After the chip 9 is inserted into the recess 1 a of the turntable 1, the fixing pin 3 is inserted into the turntable 1 by sliding the column 3 b while using the hole 9 c of the chip 9 as a guide. On the other hand, the rotary table 1 is formed with a groove (not shown) for fixing the fixing pin 3. When the fixing pin 3 is inserted into the turntable 1, the inner surface of the fixing groove comes into contact with the flat surface portion 3 c of the fixing pin 3. The two-sided width formed by the flat portion 3c of the fixing pin 3 and the groove width of the turntable 1 are finished with precise dimensions, and can be fitted. As a result, when the fixed pin 3 is inserted into the turntable 1, the tip 9 is fixedly supported on the turntable 1, and at the same time the circumferential position of the fixed pin 3 is determined.

  As shown in FIG. 4, the triangular pyramid 3 a formed on the upper portion of the fixing pin 3 has three vertices 3 aa on the bottom surface of the triangular pyramid 3 a that is approximately 120 times the triangular vertex 9 d of the throw-away tip 9. Makes an angle of degrees. That is, the concave portion 1a and the fixing groove of the turntable 1 are formed so as to achieve this 120 degree angle.

Next, an operation method of the cutting tool re-polishing apparatus 100 will be described.
First, 16 throwaway tips 9 are inserted into the recess 1 a of the turntable 1. Next, 16 fixing pins 3 are inserted into the fixing groove using the holes 9c of the chip 9 as a guide. As a result, the chip 9 is fixed to the turntable 1.

  Then, the rotary table 1 is rotated so that the center of the tip 9 is located immediately below the projection nozzle 2, and this position is set as a processing start point and initialization is performed. Next, the projection of the polishing liquid 8 on one chip 9 set immediately below the projection nozzle 2 is started. The projection time is, for example, 15 seconds. When the projection starts, as shown in FIG. 4, the polishing liquid 8 is guided to the three side surfaces 3 a of the triangular pyramid 3 a of the fixing pin 3, and evenly diverts and runs down to the three apexes of the chip 9. Collides uniformly with 9d (rake face 9a). As a result, the three rake faces 9a of the chip 9 can be re-polished evenly at the same time. When the projection is finished, the re-polishing of one chip 9 is completed.

  When the re-polishing of one chip 9 is completed, the turntable 1 is rotated in the E direction (see FIG. 2) by a predetermined index angle, for example, 22.5 ° (360 ° / 16 pieces). Then, another chip 9 adjacent to the chip 9 that has been re-polished this time is positioned immediately below the projection nozzle 2. Re-polishing is performed by projecting the polishing liquid 8 onto another chip 9 in the same manner. After that, this process is repeated. When the above process is repeated 16 times and continuously executed, the 16 chips 9 installed on the rotary table 1 are completely re-polished.

  When the lower part 3b (see FIG. 1) of the fixing pin 3 looking into the lower surface of the rotary table 1 is pressed after re-polishing is completed, the fixing pin 3 is separated from the rotary table 1 and the chip 9 is removed. Is possible.

(Other embodiments)
In the first embodiment, the triangular throw-away tip has been described, but the same applies to a quadrangular shape, a pentagonal shape, and other polygonal shapes. In this case, the head of the fixing pin is changed to a quadrangular pyramid, a pentagonal pyramid, and other polygonal pyramids. In this case, the plurality of rake faces of the chip can be re-polished evenly at the same time.
Needless to say, re-polishing can be completed in a short time if two, three, or many other projection nozzles are installed instead of one.

  As described above, it is possible to provide a cutting tool re-polishing apparatus capable of performing a stable and uniform polishing process with a short time required for the polishing process per cutting tool and having a low manufacturing cost.

It is a side view of the cutting tool re-polishing apparatus which concerns on this invention. It is a top view of the cutting tool re-polishing apparatus which concerns on this invention. It is a side view of the fixed support means which concerns on this invention. It is a top view of the fixed support means which concerns on this invention. (A) is a top view of a cutting tool, (b) is a side view of a cutting tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Cutting tool re-polishing apparatus 1 Rotary table 2 Projection nozzle 3 Fixed pin (fixed support means)
8 Polishing liquid 9 Throw away tip (cutting tool)

Claims (3)

Indexing rotary table (1),
A plurality of fixed support means (3) for fixing and supporting a plurality of cutting tools (9) installed on the indexing rotary table (1) to the indexing rotary table (1);
A projection nozzle (2) for projecting a polishing liquid (8) onto the cutting tool,
Re-polishing a plurality of the cutting tools (9) by repeating the step of re-polishing a predetermined number of the cutting tools (9) by projecting the polishing liquid (8) onto the cutting tool (9). A cutting tool re-polishing apparatus (100). The cutting tool (9) has a polygonal shape, the regrind spot (9a) of the cutting tool (9) is in the vicinity of the apex of the polygon, and the fixed support means (3) is on the top thereof. With a polygonal cone (3a)
The polygonal pyramid (3a) re-adjusts the cutting tool (9) so that each side surface of the polygonal pyramid guides the polishing liquid (8) to each of the re-polishing points (9a) of the cutting tool (9). The cutting tool re-polishing apparatus (100) according to claim 1, wherein the fixed support means (3) is fixed to the rotary table (1) so as to be positioned with respect to a polishing location (9a). . The rotary table (1) has a recess formed by transferring the outer shape of the cutting tool (9), and the cutting tool (9) is stored and installed in the recess.
The fixed support means (3) is formed with the polygonal pyramid (3a) at the top and the column (3b) at the bottom, and the column (3b) is formed with a plane part (3c) along the axial direction. ,
A groove is further formed in the rotary table (1), and an inner side surface of the groove abuts on the flat surface portion (3c) to determine a circumferential direction (F) position of the fixed support means (3). The cutting tool re-polishing apparatus (100) according to claim 2, characterized in that:

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