JP2019177457A - Tool for processing recess and method for processing recess on sliding surface - Google Patents

Abstract

To provide a tool for processing a recess and a method for processing a recess which can efficiently process a number of nearly elliptical recesses for preserving lubricant on a sliding surface without generating burr.SOLUTION: A tool 10 for processing shallow and long recesses in a nearly elliptical shape on a sliding surface of a work-piece is provided with a shank part 12a to be mounted on a rotary main shaft, a cutter body 12 having a blade part 12b joined to the shank part and at least one cutting blade 16 provided in the cutting part. The cutting blade protrudes across a range La in a shaft-line direction corresponding to a dimension H in a height direction orthogonal to a sliding direction of a recess 50 to be formed, from an outer peripheral surface of the blade part, extended spirally at a predetermined torsion angle α with respect to a center shaft line O of the tool, and is formed partially in a nearly elliptical shape when viewed in a shaft direction from an end part of the tool.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool for processing a recess for storing lubricating oil on a sliding surface that slides a moving body such as a machine tool, an XY table unit, and a measuring machine with respect to a guide surface, and a recess processing method using the tool. About.

  In machine tools, XY table units, measuring machines, etc., a guide surface is formed on a support such as a bed, a sliding surface is formed on a moving body such as a table, and lubricating oil is applied between the guide surface and the sliding surface. The guide device is configured to supply and support the moving body on the support so as to be slidable. Patent Document 1 describes an example of such a sliding surface.

  A plurality of recesses (dents) as shown in FIG. 9 are formed on the sliding surface of Patent Document 1, and the plurality of recesses are inclined at a predetermined first inclination angle with respect to the sliding direction. It consists of an elliptical first recess and an elliptical second recess that is inclined at a predetermined second inclination angle symmetrical with respect to the sliding direction. The first and second recesses are alternately formed in the sliding direction and the right angle direction, and the end portions in the longitudinal direction of the adjacent recesses are partially overlapped to communicate with each other. The lubricating oil flows between the recesses. In Patent Document 1, as a method of forming the first and second recesses on the sliding surface, a throw away tip having a cutting edge having a shape corresponding to the cross section of the first and second recesses is used. In addition, it is described that the dents are hailed one by one.

JP 2006-207811 A

  In the sliding surface of Patent Document 1, the lubricating oil accumulated in the recesses flows one after another to the adjacent recesses at the rear and obliquely rearward in the moving direction as the moving body moves, so that the recesses in the entire sliding surface can be easily obtained. As a result, the entire sliding surface is uniformly lubricated to reduce uneven wear of the sliding surface, and the positioning accuracy and motion accuracy of the moving body can be improved.

  However, the sliding surface processing method described in Patent Document 1 requires a lot of time and labor to form a large number of dents one by one by a hail process, which increases the manufacturing cost. is there. Moreover, the return | burr (burr | burr) which protrudes from a sliding surface generate | occur | produces around the processed hollow, It is necessary to finish again after a process.

  The present invention has a technical problem to solve such problems of the prior art, and is used for dent processing that can efficiently process a large number of roughly elliptical dents for lubricating oil sump on a sliding surface without generating burrs. It aims at providing a tool and a hollow processing method.

In order to achieve the above-described object, according to the present invention, a shallow elongated elliptical recess is attached to a sliding main shaft of a machine tool, and the elliptical long axis slides on a sliding surface of a workpiece. In a tool for processing so as to be inclined with respect to a direction, a cutter body having a shank portion attached to the rotation main shaft, a blade portion coupled to the shank portion, and at least one provided in the blade portion A cutting blade,
The cutting blade protrudes from the outer peripheral surface of the blade portion over an axial range corresponding to the dimension in the height direction perpendicular to the sliding direction of the recess to be formed, and is predetermined with respect to the center axis of the cutter body. There is provided a tool for recessing a sliding surface that extends in a spiral shape with a torsion angle and has an approximately elliptical partial shape when viewed in the axial direction from the end of the cutter body.

  Further, according to the present invention, in the recess processing method for forming a plurality of shallow elongated elliptical recesses on the sliding surface so that the major axis of the elliptical shape is inclined with respect to the sliding direction, At least one cutting edge projecting over the outer periphery of the body over an axial range corresponding to the height direction perpendicular to the sliding direction of the recess and extending in a spiral shape with a twist angle A tool provided is attached to a rotating spindle of a machine tool, and the axis of the tool is arranged in parallel to the work surface of the work to be machined, and the tool and the work are synchronized with the rotational speed of the tool. The locus of machining of the cutting edge of the tool is relatively moved along the machining surface of the workpiece so that the recess of the depression to be machined is a shallow elongated approximately elliptical shape, and a plurality of depressions are formed on the machining surface of the workpiece. Provided is a recess processing method to be processed.

  Further, according to the present invention, in the recess processing method for forming a plurality of shallow elongated elliptical recesses on the sliding surface so that the long axis of the elliptical shape is inclined with respect to the sliding direction. Item 5. The recess machining tool according to any one of Items 1 to 4 is attached to a rotating spindle of a machine tool, and the axis of the tool is arranged in parallel to a work surface of a workpiece to be machined, and the tool Indented so that a plurality of depressions are machined on the workpiece machining surface by moving the tool and the workpiece relative to each other in a direction perpendicular to the central axis of the tool along the workpiece machining surface. A processing method is provided.

  According to the present invention, a step of machining a plurality of shallow, roughly elongated elliptical depressions on a sliding surface that has been conventionally performed by hail machining so that the major axis of the elliptical shape is inclined with respect to the sliding direction. Since the rotary tool and workpiece can be moved relative to each other for machining, the machining efficiency is dramatically improved. Further, in this embodiment, by using a cutting blade that extends in a spiral shape and machining the recess at a high cutting speed, it is possible to prevent a return or a burr from being generated around the recess.

  Further, the specifications of the tool (for example, the tool diameter, the shape of the cutting edge, the dimensions, the number) and the processing conditions that are suitable for the dimensions of the shallow, roughly elongated elliptical recess to be processed on the sliding surface are theoretically obtained in advance. It is possible to fabricate such a tool, and to machine a recess on the sliding surface under the processing conditions, it is possible to easily machine a desired shallow, roughly elongated elliptical recess. As a result, it is possible to ensure the desired contact area ratio of the sliding surface, lubricating oil retention, lubricating fluid flow, high rigidity and wear resistance, and movement accuracy, controllability, It is possible to obtain a sliding surface with high attenuation.

It is a side view of the tool for hollow processing by preferable embodiment of this invention. It is a perspective view of the tool of FIG. FIG. 2 is a side view of the tool viewed from a rotational position different from that of FIG. 1 around the central axis of the tool by 90 °. FIG. 4 is a cross-sectional view of the tool of FIG. 1 taken along line IV-IV in FIG. 3. FIG. 2 is an enlarged end view of the tool of FIG. 1 as viewed from the tip side. It is a schematic diagram of the tool shown with the hollow of the substantially elongate elliptical shape of the shallow shape which should be processed. It is a schematic perspective view for demonstrating the case where a hollow is processed into the sliding surface of a dovetail groove. FIG. 8 is a side view of FIG. 7 viewed in the direction of arrow VIII in FIG. 7. It is a schematic plan view which shows an example of the pattern of the hollow formed by applying this invention. It is a schematic plan view which shows the other example of the pattern of a hollow. It is the schematic for demonstrating the case where a hollow is processed using the tool which has the cutting blade arrange | positioned in 4 steps | paragraphs. It is an expanded end view of the tool for hollow processing by embodiment of t of this invention. (A) is a figure which shows the tool path | route of the tool of FIG. 12, (b) is the schematic plan view which showed the hollow processed by the tool path | route of (a) corresponding to the tool path | route. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
A recess machining tool (hereinafter simply referred to as a tool) 10 includes a substantially cylindrical cutter body 12 having at least one cutting edge 16. The cutter body 12 includes a cylindrical shank portion 12a attached to the tip of a rotating spindle (not shown) of a machine tool via a tool holder 40 (FIG. 6), and a blade portion 12b on the tip side of the shank portion 12a. have. The blade portion 12b is formed with two rectangular cutout portions 14 extending in parallel to the central axis O from the tip of the cutter body 12 to the central portion thereof.

  In the present embodiment, two cutting blades 16 are formed. The two cutting blades 16 are provided one by one on the two side surfaces 15 where the notch portions 14 are not formed in the blade portion 12b. Each of the two cutting blades 16 is extended in a string form or a spiral form along the side face 15 at a predetermined twist angle α (FIG. 6). The position of each cutting edge 16 in the axial direction is determined by the pattern of the recess 50 (FIG. 6) to be formed and is not particularly limited. However, in the case of the patterns shown in FIGS. Be placed. In the illustrated embodiment, the two cutting edges 16 are formed with a phase difference of 180 ° with respect to the central axis O.

  4 to 6, the cutting edge 16 has a rake face 16a. In the present embodiment, the rake face 16 a faces the shank portion 12 a of the tool 10. When the cutting edge 16 is projected onto a plane perpendicular to the central axis O of the tool 10, the two cutting edges 16 have a center on the central axis O and a line segment PP passing through the apex P of the two cutting edges 16. Is extended along a common ellipse having a major axis. The ellipse is determined such that the shape of the side surface of the rotating body rotated around its short axis (axis η perpendicular to the axis ζ along the line segment PP) becomes the shape of the bottom surface of the recess 50 to be formed. can do. FIG. 4 is a cross section of the tool 10 taken along the arrow IV-IV in FIG. In FIG. 3, the arrow line IV-IV is a straight line perpendicular to the twist angle α of the cutting edge 16. Moreover, when the cutting blade according to claim 1 is viewed from the end of the cutter body in the axial direction, the cutting blade 16 is divided by the notch 14 in FIG. It means that it looks like two elliptical arcs.

  The height h of the cutting edge 16 at the apex P can be determined by the depth of the recess 50 to be formed and the clearance secured between the tool 10 and the sliding surface of the workpiece to be machined. Further, the cutting edge 16 is formed over at least the axial range La corresponding to the dimension H of the recess 50 in the direction orthogonal to the sliding direction Ds (the height of the recess 50 to be formed).

Hereinafter, the hollow processing method using the tool 10 according to the present embodiment will be described.
FIGS. 7 and 8 show, as an example, a case where the recess 50 is formed on the sliding surfaces 212 and 214 of the dovetail groove of the work 210 using the tool 10. The dovetail groove is formed by a horizontal sliding surface 212 and a sliding surface 214 inclined at an angle θ with respect to the sliding surface 212. During machining, the tool 10 is oriented such that its central axis O is parallel to the sliding surfaces 212 and 214 on which machining is performed and is perpendicular to the sliding direction Ds. In this state, when the tool 10 is rotated around the central axis O, the tool 10 is moved so that the apex P of the cutting edge 16 passes through the deepest part of the recess 50 formed in the sliding surfaces 212 and 214. The tool 10 is positioned away from the sliding surfaces 212 and 214.

  In this state, while rotating the tool 10 around the central axis O, the tool 10 is fed in parallel to the sliding direction and is moved to the sliding surfaces 212 and 214, for example, in a pattern as shown in FIGS. Form. The rotation direction and the feeding direction are not limited, but are preferably determined so as to be down-cut as shown in FIG.

  Indentations 50 can be formed in the sliding surfaces 212 and 214 in a pattern as shown in FIGS. 9 and 10, the recess 50 includes a first recess 51 and a second recess 52. Further, the flat portion 54 between the first and second depressions becomes a sliding surface that comes into contact with the guide surface.

  9 and 10, a plurality of elongated elliptical dents 50 have a predetermined direction with respect to the sliding direction of a moving body such as a table, in this embodiment, the X-axis direction. And a plurality of second depressions 52 inclined with respect to the X-axis direction in a direction different from the direction of the first depression 51. 9 and 10, the first recess 51 is inclined at an angle of, for example, 45 ° with respect to the sliding direction (X-axis direction) of the moving body, and the second recess 52 has a long length. The axis is inclined at an angle of -45 °.

  The first recesses 51 are arranged in a lattice pattern at predetermined pitches PX and PZ in the X and Z axis directions, and the second recesses 52 are in the X and Z axis directions with respect to the first recesses 51. The first and second depressions 51 and 52 are adjacently arranged in a grid pattern with an offset of 1 / 2PX and 1 / 2PZ. Yes.

  When forming the plurality of recesses 50 in a pattern as shown in FIG. 9, first, a plurality of first recesses along a straight line extending in the X-axis direction (sliding direction) perpendicular to the central axis O of the tool 10. The tool 10 is fed in the X-axis direction so that 51 are arranged in a line. As a result, the first row (1) of the first recesses 51 arranged in the X-axis direction is formed. Next, the tool 10 is arranged offset by 1/2 Px in the X-axis direction with respect to the first first recess 51 in the first row (1), and the tool 10 is set by 1/2 Pz in the Z-axis direction. The tool 10 is moved backward (moved downward in FIG. 9) and sent in the X-axis direction while rotating. Thereby, the second row (2) of the plurality of first depressions 51 is formed. The above operation is repeated up to the last column, which is the eighth column (8) in the example of FIG.

  Next, when the second recess 52 is formed, first, the tool 10 used when the first recess 51 is formed is moved along a chord winding or a spiral having a twist angle opposite to that of the tool 10. The tool is replaced with a tool (not shown) having an extended cutting edge. Then, the tool 10 is aligned with the first row (1) of the first depressions 51 in the Z-axis direction, and the first depression 51 processed first in the first row (1) is X The first column (1) of the second depressions 52 is formed by arranging the offset by 1 / 2Px in the axial direction and feeding the tool 10 in the X-axis direction while rotating. Next, the tool 10 is offset by 1/2 Px in the −X axis direction with respect to the second recess 52 in the first row (1), and retracted by 1/2 Pz in the Z axis direction (moved downward in FIG. 9). Arrange and feed the tool 10 in the X-axis direction while rotating. Thereby, the second row (2) of the plurality of second depressions 52 is formed. The above operation is repeated until the last column, which is the eighth column (8) in the example of FIG.

  In the example shown in FIG. 10, the first recesses 51 are arranged at equal intervals in the X-axis direction (sliding direction) at a pitch PX, and Z is between odd-numbered rows (n = 1, 3,...). The pitch in the axial direction is Pz. A first depression 51 in an odd-numbered row (n = 1, 3,...) And a first in an even-numbered row (n + 1) adjacent to the odd-numbered row (n = 1, 3,...) The pitch in the Z-axis direction between the recesses 51 is ¼ Pz. The second recess 52 is offset by 1/4 Pz in the Z-axis direction with respect to the first recess 51 in the same row. In addition, Z between the second depression 52 in a certain odd-numbered row (n = 1, 3,...) And the second depression 52 in the even-numbered (n + 1) -th row adjacent to the odd-numbered row. The pitch in the axial direction is 1/4 Pz.

  When forming a plurality of depressions in a pattern as shown in FIG. 10, first, the plurality of first depressions 51 are arranged in a line along a straight line extending in the X-axis direction perpendicular to the central axis O of the tool 10. Thus, the tool 10 is sent in the X-axis direction. Thereby, the first row (1) of the first depressions 51 is formed. Next, the tool 10 is offset by 1/2 Px in the X-axis direction with respect to the first first recess 51 in the first row (1), and the tool 10 is retracted by 1/4 Pz in the Z-axis direction (in FIG. 10). The tool 10 is rotated and sent in the X-axis direction. Thereby, the second row (2) of the plurality of first depressions 51 is formed. Next, the tool 10 is offset by 1/2 Px in the −X axis direction with respect to the first recesses 51 in the second row (2), and the tool 10 is retracted by 3/4 Pz in the Z axis direction (downward in FIG. 10). To the X axis direction while rotating the tool 10. Thereby, the second row (3) of the plurality of first depressions 52 is formed. The above operation is repeated up to the last column, which is the eighth column (8) in the example of FIG.

  Next, with respect to the second recess 52, the tool 10 used when the first recess 51 is formed is cut along a chord winding or a spiral having a twist angle opposite to that of the tool 10. Replace with a tool (not shown) having a blade. Next, the tool is advanced by 1/4 Pz in the Z-axis direction with respect to the first row (1) of the first depressions 51 (offset upward in FIG. 10), and with respect to the first depressions 51 The tool is arranged with an offset of 1/2 Px in the X-axis direction. Then, the tool 10 is rotated and sent in the X-axis direction to form the first row (1) of the second recesses 52. Next, the tool 10 is disposed by offsetting 1/2 Px in the −X axis direction (leftward in FIG. 10), retreating the tool 10 by 3/4 Pz in the Z axis direction (moving downward in FIG. 10), and Send in the X-axis direction while rotating. Thereby, the second row (2) of the plurality of second depressions 52 is formed. Next, the tool is disposed with an offset of 1/2 Px in the X-axis direction, and is moved backward by 1/4 Pz (moved downward in FIG. 10), and the tool is sent in the X-axis direction while rotating. Thereby, the second row (2) of the plurality of second depressions 52 is formed. The above operation is repeated up to the last column, which is the eighth column (8) in the example of FIG.

In the above embodiment, the method of forming the recesses 50 one by one has been described. However, a plurality of rows may be formed while the tool is sent once in the X-axis direction (sliding direction).
In the example shown in FIG. 11, the tool 20 has a plurality of pairs, for example, four pairs of cutting blades 16 arranged in the axial direction as shown. That is, the tool 20 has two cutting edges 16 that are arranged in four stages in the direction of the central axis O, and arranged in each stage with a phase difference of 180 °.

  In FIG. 11, the tool 20 is attached to an angle spindle attachment 400 via a tool holder 40, and the angle spindle attachment 400 is fixed to a stationary part such as a housing of a spindle device 300 of a machine tool, and its input shaft is The rotary spindle 302 is rotatably supported by the spindle device 300 of the machine tool. The rotation of the main shaft 302 transmitted to the input shaft is transmitted to the output shaft to which the tool 20 is attached by changing the direction of the rotation shaft via a gear train (not shown) in the angle main shaft attachment.

  The workpiece 200 can be a table as a moving body such as a machine tool, an XY table unit, or a measuring machine. In this example, the sliding surface 100 is attached to the sliding member 100 affixed to a support surface 202 facing a guide surface (not shown) provided on a support body (not shown) such as a bed. Can be formed. The sliding member may be made of a material having high wear resistance and a low friction coefficient, for example, a thin plate made of a fluororesin, and for example, a bearing material marketed under the trade name of Turkite or BEAREE.

  The above-described recess processing method is an embodiment described in claim 6, and a desired recess can be processed if the tool 10 is linearly fed along the X axis, that is, the processing surface of the workpiece. The invention described in claim 5 is a concavo-convex dent processing method including the invention described in claim 6, and will be described using another embodiment shown in FIGS. 5, the cutting edge 16 has an elliptical shape as shown in FIG. 5, but the tool 10 ′ of another embodiment is concentric with a circle where the cutting edge 16 ′ indicates the shank portion 12 as shown in FIG. 12. Except this, it has the same twist angle and the notch part 14 as the tool 10 of FIG.

  When this tool 10 'is attached to the rotation spindle and relatively moved along the tool path CP as shown in FIG. 13A, a substantially elliptical recess 50 as shown in FIG. can do. The tool path CP has a shape that is moved by a dimension in the depth direction of the recess in the Y-axis direction, a section corresponding to the length in the X-axis direction of the recess 50 to be processed. 6. The locus of the processing point of the cutting edge of the tool in the tool and the workpiece in synchronism with the rotational speed of the tool according to claim 5 so that the locus of the cutting edge of the tool becomes a shallow elongated approximate oval shape to be processed. In addition, “relatively moving along the work surface of the workpiece” includes the other embodiments. Paying attention to the machining points of the cutting edges 16 and 16 ', it can be seen that the locus of the same shape as the tool path CP is drawn with the depth of the recess.

DESCRIPTION OF SYMBOLS 10 Tool 12 Cutter body 12a Shank part 12b Blade part 14 Notch part 16 Cutting blade 50 Indentation 51 1st indentation 52 2nd indentation 210 Workpiece 212 Sliding surface 214 Sliding surface

To achieve the above object, according to the present invention, attached to a rotary spindle of a machine tool, in the tool for pressurizing engineering work, and a shank portion attached to the rotary spindle, coupled to the shank portion blade A cutter body having a portion, and two cutting blades provided on the blade portion,
The two cutting blades are spirally extended with a predetermined twist angle with respect to the center axis of the cutter body, and are arranged with a phase difference of 180 ° around the center axis of the cutter body. during the cutting, the parallel from the distal end of the cutter body with respect to the central axis of the cutter body, and is formed with two notches of a plane shape extending in parallel to each other, the end of the previous SL cutter body When viewed in the axial direction from the section, two intersections of the two cutting edges and a straight line that extends parallel to the two notches and intersects perpendicularly to the central axis of the cutter body A tool for machining a recess on a sliding surface, in which the two cutting blades are extended, is provided along a part of a common ellipse whose major axis is a connecting line segment .

4 to 6, the cutting edge 16 has a rake face 16a. In the present embodiment, the rake face 16 a faces the shank portion 12 a of the tool 10. When the cutting edge 16 is projected onto a plane perpendicular to the central axis O of the tool 10, the two cutting edges 16 have a center on the central axis O and a line segment PP passing through the apex P of the two cutting edges 16. Is extended along a part of a common ellipse having a major axis. The ellipse is determined such that the shape of the side surface of the rotating body rotated around its short axis (axis η perpendicular to the axis ζ along the line segment PP) becomes the shape of the bottom surface of the recess 50 to be formed. can do. FIG. 4 is a cross section of the tool 10 taken along the arrow IV-IV in FIG. In FIG. 3, the arrow line IV-IV is a straight line perpendicular to the twist angle α of the cutting edge 16. Further, when the cutting edge according to claim 1, viewed in the axial direction from the end portion of the cutter body, that exhibits a partial schematic elliptical shape, in FIG. 5, the cutting edge 16 notch 14 It means that it looks like two divided elliptical arcs.

Embodiments of the above-described recess machining how is, X-axis of the tool 10, that is, if straight relative feeding along the machined surface of the workpiece, it is possible to process the desired recess. The invention described in claim 3 is a concavo-convex dent processing method including the above-described embodiment , and will be described using another embodiment shown in FIGS. 5, the cutting edge 16 has an elliptical shape as shown in FIG. 5, but the tool 10 ′ of another embodiment is concentric with a circle where the cutting edge 16 ′ indicates the shank portion 12 as shown in FIG. 12. Except this, it has the same twist angle and the notch part 14 as the tool 10 of FIG.

When this tool 10 'is attached to the rotation spindle and relatively moved along the tool path CP as shown in FIG. 13A, a substantially elliptical recess 50 as shown in FIG. can do. The tool path CP has a shape that is moved by a dimension in the depth direction of the recess in the Y-axis direction, a section corresponding to the length in the X-axis direction of the recess 50 to be processed. 4. The trajectory of the processing point of the cutting edge of the tool in the tool and the workpiece in synchronization with the rotational speed of the tool according to claim 3 so that the shallow elongated approximate elliptical shape of the recess to be processed In addition, “relatively moving along the work surface of the workpiece” includes the other embodiments. Paying attention to the machining points of the cutting edges 16 and 16 ', it can be seen that the locus of the same shape as the tool path CP is drawn with the depth of the recess.

Claims (6)

In a tool that is attached to a rotating spindle of a machine tool and processes a shallow elongated substantially elliptical recess on a sliding surface of a workpiece so that the elliptical long axis is inclined with respect to the sliding direction.
A cutter body having a shank portion attached to the rotating main shaft, and a blade portion coupled to the shank portion;
Comprising at least one cutting edge provided in the blade portion;
The cutting blade protrudes from the outer peripheral surface of the blade portion over an axial range corresponding to the dimension in the height direction perpendicular to the sliding direction of the recess to be formed, and is predetermined with respect to the center axis of the cutter body. A sliding surface recess working tool characterized in that it extends in a spiral shape with a torsion angle and has a substantially elliptical partial shape when viewed in the axial direction from the end of the cutter body.   2. The recess working tool according to claim 1, wherein the cutting blade includes two cutting blades arranged with a phase difference of 180 ° around a central axis of the cutter body.   3. The recess working tool according to claim 2, wherein a planar cutout portion is formed between the two cutting blades so as to extend in parallel with a center axis of the cutter body from a tip end of the cutter body.   2. The recess working tool according to claim 1, wherein the cutting blade includes a plurality of cutting blades spaced apart in a central axis direction of the cutter body. In the recess processing method of forming a plurality of shallow elongated elliptical recesses on the sliding surface so that the elliptical long axis is inclined with respect to the sliding direction,
At least one cutting edge projecting over the axial range corresponding to the dimension in the height direction perpendicular to the sliding direction of the recess on the outer periphery of the cutter body and extending in a spiral shape with a twist angle Is attached to the rotating spindle of the machine tool,
Arranging the axis of the tool parallel to the work surface of the workpiece to be machined,
In synchronization with the rotational speed of the tool, the tool and workpiece are placed on the work surface of the work so that the locus of the machining point of the cutting edge of the tool becomes a shallow elongated approximate elliptical shape of the recess to be machined. Relative movement along,
A recess processing method characterized by processing a plurality of recesses on a work surface of a workpiece. In the recess processing method of forming a plurality of shallow elongated elliptical recesses on the sliding surface so that the elliptical long axis is inclined with respect to the sliding direction,
The recess working tool according to any one of claims 1 to 4 is attached to a rotating spindle of a machine tool,
Arranging the axis of the tool parallel to the work surface of the workpiece to be machined,
Synchronously with the rotational speed of the tool, the tool and the work are moved relative to each other in the direction perpendicular to the center axis of the tool along the work surface of the work,
A recess processing method characterized by processing a plurality of recesses on a work surface of a workpiece.

Images