JP2019070443A - Process of manufacture ring-shaped component and manufacturing apparatus - Google Patents

Abstract

To provide a process of manufacture ring-shaped component suitable for large item small scale production by supplying the ring-shaped component at a short time.SOLUTION: A process of manufacture ring-shaped component comprises: an inside cutting process in that a first cutting blade is moved in a radial direction D4 from the state of being applied to the thickness center of one end 91a of the rotating cylindrical material 91, and is moved in the axial direction D1 to the other end 91b side and cut the inner periphery R1 side of the cylindrical material 91; an outside cutting process in that before, after or simultaneously of the inside cutting process, a second cutting blade is moved in the radial direction D4 from the state of being applied to the thickness center of one end 91a of the rotating cylindrical material 91, and is moved in the axial direction D1 to the other end 91b side and cut the outer periphery R2 side of the cylindrical material 91; and a separation process in that after the inside cutting process and the outside cutting process, a portion 92 of the cylindrical material 91 cut from the inner periphery R1 side and the outer periphery R2 side is cut-off from the remaining portion 93 of the cylindrical material 91 to obtain the ring-shaped component 94 having a substantially circular cross section.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method and an apparatus for manufacturing a ring-shaped part.

  O-rings are widely used for sealing. O-rings are made of a resilient material to seal by the pressure generated when crushed. A common material for O-rings is rubber. Patent Document 1 below discloses a method of producing an O-ring made of silicone rubber.

  The manufacturing method disclosed in Patent Document 1 is a method of manufacturing an O-ring by press molding using a mold. In press molding, since the mold is heated, the silicone rubber in the mold cavity expands when performing press molding, and burrs are easily generated.

  As measures against this, excess silicone rubber other than the volume of the O-ring as a product or silicone rubber expanded by heat is absorbed by the burr absorbing portion, and then the burr absorbing portion is cut away. However, it is difficult to remove only the product part cleanly and defects are likely to occur. Therefore, in the technique of Patent Document 1, press molding is performed by sandwiching a film having a thickness of about 25 μm between a stationary mold having an O-ring mold cavity and a pressing mold.

Japanese Patent Application Laid-Open No. 10-323845

  However, when manufacturing an O-ring by press molding, a mold is required, and a manufacturing period of the mold itself is required. In addition, since different molds are required for each O-ring shape, it is not suitable for high-mix low-volume production.

  Therefore, an object of the present invention is to provide a method and an apparatus for manufacturing ring-shaped parts, which can supply ring-shaped parts in a short time and is suitable for high-mix low-volume production.

  The method for producing a ring-shaped part according to the present invention comprises the steps of: rotating a cylindrical cylindrical material made of resin around its axial direction; and rotating the first cutting blade in the rotating step. From the state of being applied to the thickness center of one end, it is reciprocated in the radial direction of the cylindrical material, and is moved relatively to the other end side of the cylindrical material in the axial direction to obtain a semicircular locus. An inner cutting step of cutting the inner circumferential side of the cylindrical material while forming, and before, after or simultaneously with the inner cutting step, a thickness of the one end of the cylindrical material which is rotating a second cutting blade From the state of being applied to the center of the cylinder, by reciprocating in the radial direction of the cylindrical material, and relatively moving to the side of the other end of the cylindrical material in the axial direction, to form a semicircular locus The outer side which cuts the outer peripheral side of the cylindrical material while After the cutting process, the inner cutting process and the outer cutting process, the portion of the cylindrical material cut on the inner and outer peripheral sides is cut and separated from the remaining portion of the cylindrical material to form a substantially circular shape Obtaining a ring-shaped part having a cross-sectional shape, and a method of manufacturing the ring-shaped part.

  In the separating step, a third cutting blade is placed on the other end side of the portion of the cylindrical material which is rotating and cut the inner and outer circumferential sides, and a portion of the cylindrical material is cut. May be cut and separated from the remainder of the cylindrical material.

  Further, in the inner cutting step, the outer cutting step and the separation step, the first cutting edge, the second cutting edge and the third cutting edge are simultaneously gripped and axially perpendicular to the axial direction The processing to the cylindrical material may be performed using a processing device having a blade moving mechanism which moves laterally.

  The resin may be a fluorine resin.

  The ring-shaped part manufacturing apparatus according to the present invention comprises a material rotating mechanism that rotates a cylindrical resin-made material about its axial direction, and a first cutting blade moving mechanism that moves a first cutting blade. And reciprocating the first cutting blade in the radial direction of the cylindrical material from a state in which the first cutting blade is placed against the thickness center of one end of the cylindrical material being rotated by the material rotating mechanism. A first cutting blade moving mechanism that cuts the inner circumferential side of the cylindrical material while forming a semicircular locus by moving it in the axial direction toward the other end of the cylindrical material, and a second cutting A second cutting blade moving mechanism for moving a blade, wherein the second cutting blade is placed on the center of the thickness of the one end of the rotating cylindrical material, Reciprocally move in the radial direction, and in addition to the other of the cylindrical material in the axial direction The second cutting blade moving mechanism that cuts the outer circumferential side of the cylindrical material while forming a semicircular locus by moving it to the side, and the third cutting blade moving mechanism that moves the third cutting blade The third cutting blade is placed on the other end side of the portion of the cylindrical material cut and rotated on the inner peripheral side and the outer peripheral side, and the cylindrical material portion is moved to the cylinder And a third cutting blade moving mechanism for obtaining a ring-shaped part having a substantially circular cross section by cutting and separating from the remaining part of the ring-shaped material.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to supply ring-shaped components in a short time, the manufacturing method and manufacturing apparatus of ring-shaped components suitable for high-mix low-volume production can be provided.

It is a front view which shows the manufacturing apparatus of the ring-shaped part of one Embodiment of this invention. It is a top view of the above-mentioned manufacture device. (A) is a figure which shows the 1st cutting blade of the said manufacturing apparatus. (B) is a figure which shows the 2nd cutting blade of the said manufacturing apparatus. It is a figure which shows an example of the O-ring manufactured by this invention, (A) is a general view, (B) is the sectional view on the AA line shown to (A). It is a figure which shows the inner periphery cutting process of ring-shaped components in the manufacturing method of ring-shaped components of one Embodiment of this invention. It is a figure which shows the outer periphery cutting process of ring-shaped components in the manufacturing method of ring-shaped components of one Embodiment of this invention. It is a figure which shows the isolation | separation process of ring-shaped components in the manufacturing method of ring-shaped components of one Embodiment of this invention.

  Hereinafter, with reference to the drawings, an apparatus 1 for manufacturing a ring-shaped part according to an embodiment of the present invention will be described. The method of manufacturing a ring-shaped part according to an embodiment of the present invention is performed by this manufacturing apparatus. FIG. 1 is a front view showing an apparatus for manufacturing a ring-shaped part according to an embodiment of the present invention. FIG. 2 is a plan view of the manufacturing apparatus. FIG. 3A is a view showing a first cutting blade of the manufacturing apparatus. FIG. 3B is a view showing a second cutting blade of the manufacturing apparatus. FIG. 4 is a view showing an example of an O-ring manufactured according to the present invention, in which (A) is a general view and (B) is a cross-sectional view taken along line AA shown in (A). FIG. 5 is a view showing an inner periphery cutting step of the ring-shaped part in the method of manufacturing a ring-shaped part according to the embodiment of the present invention. FIG. 6 is a view showing the outer periphery cutting step of the ring-shaped part in the method of manufacturing a ring-shaped part according to the embodiment of the present invention. FIG. 7 is a view showing the separation step of the ring-shaped part in the method of manufacturing a ring-shaped part according to the embodiment of the present invention.

  In each drawing, the direction in which the central axis of the rotary shaft 14a of the manufacturing apparatus 1 extends is referred to as the main axis direction D1, the direction orthogonal to the main axis direction D1 on the horizontal plane is referred to as the depth direction D2, and orthogonal to the main axis direction D1 and the depth direction D2. The vertical direction is called vertical direction D3. The axial direction of the cylindrical raw material 91 made of resin coincides with the main axis direction D1, and is also referred to as the axial direction D1. With regard to the main axis direction D1, the direction approaching the chuck 14b of the manufacturing apparatus 1 is referred to as a first main axis direction D11, and the direction opposite to the first main axis direction D11 is referred to as a second main axis direction D12. The main axis direction D1 coincides with the axial direction of the cylindrical material 91 held by the material rotation mechanism 14 (the rotation shaft 14a, the chuck 14b). Therefore, the axial direction of the cylindrical material 91 is referred to as an axial direction D1. Regarding the depth direction D2, the direction toward the front is referred to as a first depth direction D21, and the direction opposite to the first depth direction D21 is referred to as a second depth direction D22. In the vertical direction 3, the upward direction is referred to as an upward direction D31, and the opposite direction to the upward direction D31 is referred to as a downward direction D32. Of the radial direction D4 of the cylindrical raw material 91, the direction toward the center is referred to as an inner diameter direction D41, and the direction opposite to the inner diameter direction D41 is referred to as an outer diameter direction D42. In the present embodiment, the direction extending along the horizontal surface in the radial direction D4 coincides with the depth direction D2.

[Overall configuration of ring-like parts manufacturing apparatus]
The ring-shaped part manufacturing apparatus 1 is an apparatus for manufacturing a resin-made ring-shaped part 94 having a substantially circular cross section from a resin-made cylindrical material 91, as shown in FIGS. The resin in the present embodiment is a fluorine resin. As a fluorine resin, PTFE, PFA, and FEP are illustrated. The substantially circular cross section is not limited to a true circular shape, and may be a shape that can be regarded as a circular shape. For example, it may be elliptical. The resin may be a resin other than a fluorine resin. The ring-shaped part 94 in the present embodiment is an O-ring. The ring-shaped part may be other than the O-ring.

  As shown in FIGS. 1 to 3, the manufacturing apparatus 1 for ring-shaped parts includes a material rotation mechanism 14 (rotation shaft 14 a, chuck 14 b) for rotating a cylindrical material 91 made of resin around its axial direction D 1. A first cutting blade moving mechanism 11 (a first cutting blade holder 31, a first cutting tool holder 32, a depth direction moving unit 16, a spindle direction upper moving unit 17, and a spindle direction lower moving unit) for moving the first cutting blade 30; 18) and the second cutting blade moving mechanism unit 12 (the second cutting blade holder 41, the second tool post 42, the depth direction moving unit 16, the main spindle direction upper moving unit 17, the main spindle direction to move the second cutting blade 40) Lower moving part 18) and third cutting blade moving mechanism 13 (third cutting blade holder 51, third cutting tool 52, depth direction moving part 16, main spindle direction upper moving part 17) for moving the third cutting blade 50 , And a main axis direction lower moving unit 18).

  The first cutting blade moving mechanism 11 (the first cutting blade holder 31, the first tool post 32, the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) (The first cutting blade holder 31 and the first tool post 32) and the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). The first cutting blade moving mechanism 11 starts the cylindrical material 91 from the state where the first cutting blade 30 is placed on the thickness center 91 c of the one end 91 a of the cylindrical material 91 being rotated by the material rotating mechanism 14. The cylindrical material 91 is reciprocated in the radial direction D4 and is moved toward the other end 91b of the cylindrical material 91 in the main axis direction D1 (in the first main axis direction D11) to form a semicircular arc trajectory. Cut the inner circumference R1 side of.

  The second cutting blade moving mechanism unit 12 (the second cutting blade holder 41, the second tool post 42, the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) (The second cutting blade holder 41, the second tool post 42) and the blade moving mechanism unit 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). The second cutting blade moving mechanism 12 reciprocates in the radial direction D4 of the cylindrical material 91 from the state in which the second cutting blade 40 is in contact with the thickness center 91c of the one end 91a of the rotating cylindrical material 91. By moving it and moving it in the main axis direction D1 toward the other end 91b of the cylindrical material 91 (in the first main axis direction D11), the outer circumference R2 side of the cylindrical material 91 is cut while forming a semicircular locus. Do.

  The third cutting blade moving mechanism 13 (the third cutting blade holder 51, the third tool rest 52, the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) (The third cutting blade holder 51, the third tool rest 52) and the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). The third cutting blade moving mechanism 13 places the third cutting blade 50 on the side of the other end 91 b of the portion 92 of the cylindrical raw material 91 which is cut and rotated on the inner circumference R1 side and the outer circumference R2 side. (This position is also referred to as the other end 92b). The portion 92 of the cylindrical material 91 is cut and separated from the remaining portion 93 of the cylindrical material 91.

[Material rotation mechanism 14]
The material rotation mechanism unit 14 is installed on the rotation drive drive 21 of the ring-shaped part manufacturing apparatus 1 and includes a rotation shaft 14 a and a chuck 14 b. The rotating shaft 14a rotates the cylindrical material 91 at an arbitrary number of rotations and at a constant number of rotations around its central axis. The rotation shaft 14a is driven by a motor (not shown) in the rotation drive drive 21, and a control device (not shown) in the rotation drive drive 21 performs control of start, stop and rotation speed. The chuck 14 b is provided at the tip of the rotary shaft 14 a and holds the cylindrical material 91. The chuck 14 b is a cylinder so that the cylindrical material 91 does not move or swing during cutting due to the cutting force by the first cutting blade 30, the second cutting blade 40 or the third cutting blade 50. The outer periphery R2 side of the cylindrical material 91 is held by a plurality of radially disposed claws (not shown) so that the rotation center of the cylindrical material 91 and the main axis direction D1 thereof coincide with each other.

[Tool moving mechanism 15]
The blade moving mechanism unit 15 includes a depth direction moving unit 16, a spindle direction upper moving unit 17, and a spindle direction lower moving unit 18. The blade moving mechanism unit 15 is shared by the first cutting blade moving mechanism unit 11, the second cutting blade moving mechanism unit 12 and the third cutting blade moving mechanism unit 13. The main spindle direction lower moving parts 18, 18 are provided in a pair in the depth direction D2 separately, and the main spindle direction D1 (first main driving direction of the base 19 or 19 of the manufacturing apparatus 1) It reciprocates in the spindle direction D11 and the second spindle direction D12). The bases 19, 19 extend in the second main spindle direction D12 in parallel to the main spindle direction D1 from the rotationally driven drive body 21 on both sides in the depth direction D2 sandwiching the rotation shaft 14a.

  The main spindle direction upper moving portion 17 is bridged, fixed and supported on the main spindle direction lower moving portions 18, 18 separated in the depth direction D2, and therefore, the main axis direction D1 of the main spindle direction lower moving portions 18, 18 Along the main axis direction D1.

The spindle direction upper moving unit 17 moves the first cutting blade 30 to the thickness center 91 c of the one end 91 a of the cylindrical material 91 rotated by the material rotating mechanism unit 14, and then the other cylindrical material 91. It is moved in the first spindle direction D11 to the side of the end 91b.
The spindle direction upper moving unit 17 moves the second cutting blade 40 to the thickness center 91c of the one end 91a of the rotating cylindrical material 91, and then moves the second cutting blade 40 toward the other end 91b of the cylindrical material 91. 1) Move in the spindle direction D11.
The spindle direction upper moving portion 17 moves the third cutting blade 50 in the first spindle direction D11 toward the other end 91b of the cylindrical material 91 which is cut and rotated on the inner circumference R1 side and the outer circumference R2 side. Let

  The depth direction moving unit 16 is configured to be slidably moved in the depth direction D <b> 2 to the spindle direction upper moving unit 17. In the present embodiment, as shown in FIG. 1 and FIG. 2, the depth direction moving portion 16 has two inverted trapezoidal shapes (the lower base is shorter than the upper base) extending in the depth direction D2 at the bottom portion. Of parallel grooves. The groove is engaged with an inverted trapezoidal protrusion provided on the opposite surface of the main spindle direction upper moving portion 17.

  The depth direction moving unit 16 is configured to receive the depth direction D2 (a first depth direction D21, a second depth direction D22) relative to the main spindle direction upper moving unit 17 by a signal from an actuator and a rotary drive 21 not shown. Move to). On the other hand, the depth direction moving unit 16 does not move in the vertical direction D3 and the main axis direction D1. Note that FIG. 2 shows a state in which the depth direction moving unit 16 has moved on the upper side of the spindle direction upper moving unit 17 in the second depth direction D22.

  The depth direction moving unit 16 moves the first cutting blade 30 in the depth direction D2, and applies the first cutting blade 30 to the thickness center 91c of the one end 91a of the cylindrical material 91 rotated by the material rotation mechanism unit 14. Then, the depth direction moving portion 16 reciprocates in the radial direction D4 of the cylindrical material 91 from the state where the depth direction moving portion 16 is in contact with the thickness center 91c, and the main shaft direction upper moving portion 17 is of the other end 91b of the cylindrical material 91 Move to the side. As a result, the first cutting blade 30 forms a semi-circular trajectory and cuts the inner circumference R1 side of the cylindrical material 91.

  The depth direction moving unit 16 moves the second cutting blade 40 in the depth direction D2, and applies the second cutting blade 40 to the thickness center 91c of the one end 91a of the rotating cylindrical material 91. Then, the depth direction moving portion 16 reciprocates in the radial direction D4 of the cylindrical material 91 from the state where the depth direction moving portion 16 is in contact with the thickness center 91c, and the main shaft direction upper moving portion 17 is of the other end 91b of the cylindrical material 91 Move to the side. By this, the second cutting blade 40 forms a semicircular arc trajectory and cuts the outer periphery R2 side of the cylindrical material 91.

  The depth direction moving unit 16 moves the third cutting blade 50 in the second depth direction D22. As a result, the third cutting blade cuts and separates the portion 92 of the cylindrical material 91 which is cut and rotated from the remaining portion 93 on the inner circumference R1 side and the outer circumference R2 side.

[First to third cutting blade holding parts]
As shown in FIGS. 1 and 2, the first cutting blade holding unit includes a first cutting blade holder 31 and a first tool post 32, and fixes the first cutting blade 30 to the depth direction moving unit 16. The first cutting blade 30 is held so that the cutting edge 30a faces the second depth direction D22 at the same height position as the central axis of the rotation shaft 14a. The first cutting blade holder 31 is fixed to the first tool rest 32 while holding the first cutting blade 30.

  The first tool rest 32 is engaged with two parallel dovetail-shaped grooves provided in the depth direction moving part 16 on the upper surface of the depth direction moving part 16. The first tool post 32 can be disposed at any position of the depth direction moving unit 16 as long as it is on the dovetail shaped groove.

  The second cutting blade holding unit includes a second cutting blade holder 41 and a second tool rest 42, and fixes the second cutting blade 40 to the depth direction moving unit 16. The second cutting blade 40 is gripped so that the cutting edge 40a faces the first depth direction D21 at the same height position as the central axis of the rotation shaft 14a. The second cutting blade holder 41 is fixed to the second tool rest 42 while holding the second cutting blade 40.

  The second tool rest 42 is engaged with the above-described two parallel dovetail-shaped grooves on the upper surface of the depth direction moving unit 16. The second tool rest 42 can be disposed at an arbitrary position of the depth direction moving unit 16 as long as it is on the dovetail shaped groove.

  The third cutting blade holding unit includes a third cutting blade holder 51 and a third tool rest 52, and fixes the third cutting blade 50 to the depth direction moving unit 16. The third cutting blade 50 is held so that the cutting edge 50a faces the second depth direction D22 at the same height position as the central axis of the rotation shaft 14a. The third cutting blade holder 51 is fixed to the third tool rest 52 while holding the third cutting blade 50.

  The third tool rest 52 is engaged with the above-described two parallel dovetail-shaped grooves on the upper surface of the depth direction moving unit 16. The third tool rest 52 can be disposed at an arbitrary position of the depth direction moving unit 16 as long as it is above the dovetail shaped groove.

  That is, as shown in FIG. 2, the first cutting edge 30, the second cutting edge 40 and the third cutting edge 50 are simultaneously fixed to the depth direction moving unit 16.

[First to third cutting blades]
As shown in FIG. 3A, the first cutting edge 30 is a cutting edge for the inner cutting process of the cylindrical material 91, and the cutting edge 30a has an inverted trapezoidal shape. The first cutting edge 30 has its cutting edge 30a, for example, in the second depth direction D22, and the ridgeline 30b-30c formed by the proximal end 30b and the distal end 30c of the cutting edge 30a is the axis of the rotation axis 14a. It is held by the first cutting blade holder 31 so as to be parallel to the heart.

  As shown in FIG. 3 (B), the second cutting blade 40 is a cutting blade for the outer cutting process of the cylindrical material 91, and the cutting edge 40a has an inverted trapezoidal shape. The second cutting blade 40 has its cutting edge 40a, for example, in the first depth direction D21, and the ridgeline 40b-40c formed by the proximal end 40b and the distal end 40c of the cutting edge 40a is the axis of the rotation axis 14a. It is held by the second cutting blade holder 41 so as to be parallel to the heart.

  The third cutting blade 50 is a cutting blade for the separation process of the cylindrical material 91, and the cutting edge 50a has a knife tip shape. The cutting edge 50a of the third cutting blade 50 faces in the second depth direction D22.

Next, the method of manufacturing a ring-shaped part according to an embodiment of the present invention, which is performed by the manufacturing apparatus 1, will be described in detail.
A method of manufacturing a ring-shaped part according to an embodiment of the present invention includes a rotating step, an inner cutting step, and an outer cutting step.
The rotation step is a step of rotating the cylindrical cylindrical material 91 made of resin around its axial direction D1.
In the inner cutting step, the first cutting blade 30 is reciprocated in the radial direction D4 of the cylindrical material 91 from a state in which the first cutting blade 30 is in contact with the thickness center 91c of one end 91a of the cylindrical material 91 rotating in the rotation step. At the same time, it is a step of cutting the inner circumference R1 side of the cylindrical material 91 while forming a locus of a semicircular arc by moving relatively to the other end 91b side of the cylindrical material 91 in the axial direction D1.

  In the outer cutting process, before, after or simultaneously with the inner cutting process, the second cutting blade 40 is placed on the thickness center 91 c of the one end 91 a of the rotating cylindrical material 91, By reciprocating in the radial direction D4 and relatively moving in the axial direction D1 toward the other end 91b of the cylindrical material 91, the outer circumference R2 side of the cylindrical material 91 is cut while forming a semicircular arc locus Process.

  In the separation step, after the inner cutting step and the outer cutting step, the portion 92 of the cylindrical raw material 91 obtained by cutting the inner circumference R1 side and the outer circumference R2 side is cut from the remaining portion 93 of the cylindrical raw material 91 and separated. In this step, a ring-shaped part 94 having a substantially circular cross section is obtained. More specifically, in the separation step, the third cutting blade 50 is brought into contact with the other end 91 b side of the portion 92 of the cylindrical raw material 91 which is rotated and cut on the inner circumference R1 side and the outer circumference R2 side. The portion 92 of the bar-shaped material 91 is cut and separated from the remaining portion 93 of the cylindrical material 91.

Further, in the inner cutting step, the outer cutting step and the separation step, the first cutting blade 30, the second cutting blade 40 and the third cutting blade 50 are simultaneously gripped and perpendicular to the axial direction D1 and the axial direction D1. The cylindrical material 91 is processed using the processing device 22 having the blade moving mechanism 15 (16, 17, 18) moving in the lateral direction (depth direction) D2.
Further details will be given below.

[Inside cutting process]
As shown in FIG. 5A, the first cutting edge is moved by the movement of the main spindle direction lower moving portion 18 and the main spindle direction upper moving portion 17 in the first main spindle direction D11 and the movement of the depth direction moving portion 16 in the depth direction D2. The proximal end 30b of the thirty cutting edge 30a hits the thickness center 91c of one end 91a of the rotating cylindrical material 91.

  Thereafter, as shown in FIG. 5B, the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit) based on the cutting data input to the rotary drive 21 The movement 18) moves the proximal end 30b of the cutting edge 30a of the first cutting blade 30 in the inner diameter direction D41 of the cylindrical blank 91 and in the first main spindle direction D11. As a result, the proximal end 30b of the cutting edge 30a of the first cutting blade 30 forms a locus of a semicircular arc, while the inner circumference R1 side of the cylindrical material 91 is 50% of the semicircular arc, that is, a 1⁄4 arc shape Cut into

  Thereafter, as shown in FIG. 5C, movement of the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) causes the first cutting blade 30 to move. The distal end 30 c of the blade tip 30 a moves in the outer radial direction D 42 of the cylindrical material 91 and also moves in the first main spindle direction D 11. As a result, the distal end 30c of the cutting edge 30a of the first cutting blade 30 forms a semi-circular track, and the range corresponding to the remaining 50% of the semi-circular arc on the inner circumference R1 side of the cylindrical material 91 is , Cut to about 1⁄4 arc shape. The distal end 30 c of the cutting edge 30 a does not move to the thickness center 91 c of the cylindrical material 91.

[Outside cutting process]
Thereafter, the first cutting blade 30 is retracted from the cylindrical material 91 by the movement of the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). Then, as shown in FIG. 6A, the second cutting blade 40 is moved by moving the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). The proximal end 40b of the cutting edge 40a hits the thickness center 91c of the one end 91a of the rotating cylindrical material 91.

  Thereafter, as shown in FIG. 6B, the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit) based on the cutting data input to the rotary drive 21 The movement 18) moves the proximal end 40b of the cutting edge 40a of the second cutting blade 40 in the outer diameter direction D42 of the cylindrical blank 91 and in the first main spindle direction D11. As a result, the proximal end 40b of the cutting edge 40a of the second cutting blade 40 has a semicircular arc trajectory, and the outer periphery R2 side of the cylindrical material 91 has 50% of the semicircular arc, that is, a 1⁄4 arc shape Cut.

  Thereafter, as shown in FIG. 6C, the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) moves the second cutting blade 40. The distal end 40c of the blade tip 40a moves in the inner diameter direction D41 of the cylindrical material 91 and moves in the first main spindle direction D11. As a result, the distal end 40c of the cutting edge 40a of the second cutting blade 40 forms a trajectory of a semicircular arc, and a range corresponding to the remaining 50% of the semicircular arc on the outer periphery R2 side of the cylindrical material 91, Cut to about 1⁄4 arc shape. The distal end 30 c of the cutting edge 30 a does not move to the thickness center 91 c of the cylindrical material 91.

  As shown in FIG. 6C, when the inner cutting process and the outer cutting process are completed, the portion 92 of the cylindrical blank 91 cut from the inner circumference R1 and the outer circumference R2 and the remaining portion 93 of the cylindrical blank 91 Are still connected and integrated.

[Separation process]
Thereafter, the second cutting blade 40 is retracted from the cylindrical material 91 by the movement of the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18). Then, as shown in FIG. 7A, the movement of the blade moving mechanism 15 (the depth direction moving unit 16, the spindle direction upper moving unit 17, and the spindle direction lower moving unit 18) moves the third cutting blade 50. The cutting edge 50a is disposed on an extension of the depth direction D2 with respect to the other end 92b of the portion 92 of the cylindrical material 91 which is cut and rotated on the inner circumference R1 side and the outer circumference R2 side.

  Thereafter, as shown in FIG. 7B, the blade tip 50a of the third cutting blade 50 is moved in the second depth direction D22 (the outer diameter direction D42) by the movement of the depth direction moving unit 16, and the cylindrical material It hits the side of the other end 92 b of the part 92 of 91. Then, the blade tip 50 a of the third cutting blade 50 cuts and separates the portion 92 of the cylindrical material 91 from the remaining portion 93 of the cylindrical material 91 by further movement of the depth direction moving unit 16. As a result, a ring-shaped part 94 having a substantially circular cross section shown in FIG. 4 is obtained.

[Effect of the embodiment]
According to the method of manufacturing a ring-shaped part of the present embodiment, for example, the following effects can be obtained.
The method of manufacturing a ring-shaped part according to the present embodiment includes a rotating step of rotating a cylindrical cylindrical raw material 91 made of resin around its axial direction D1, and a cylindrical shape in which the first cutting blade 30 is rotated in the rotating step. From the state of being applied to the thickness center 91c of one end 91a of the material 91, it is reciprocated in the radial direction D4 of the cylindrical material 91, and is relatively moved in the axial direction D1 to the other end 91b of the cylindrical material 91 Thus, the second cutting blade 40 is rotated before, after, or simultaneously with the inner cutting step of cutting the inner circumference R1 side of the cylindrical material 91 while forming a semicircular locus, and before, after or simultaneously with the inner cutting step. From the state of being in contact with the thickness center 91c of one end 91a of the cylindrical material 91, it is reciprocated in the radial direction D4 of the cylindrical material 91, and relatively toward the other end 91b of the cylindrical material 91 in the axial direction D1. Half by moving After the outer cutting step of cutting the outer periphery R2 side of the cylindrical raw material 91 while forming the locus of the arc, and the inner cutting step and the outer cutting step, the cylindrical raw material 91 cut on the inner circumference R1 side and the outer circumference R2 side And separating the portion 92 from the remainder 93 of the cylindrical blank 91 to obtain a ring-shaped part 94 having a generally circular cross-section.

  Therefore, according to the manufacturing method and the manufacturing apparatus 1 of the ring-shaped part of the present embodiment, an expensive mold is not required as compared with the manufacturing method of the ring-shaped part by mold molding. In addition, since a schedule required to manufacture a mold is not necessary, it is possible to perform high-mix low-volume production when necessary.

In the method of manufacturing a ring-shaped part according to the present embodiment, the separation step is performed on the other end 91 b side of the portion 92 of the cylindrical raw material 91 which is rotating and cutting the inner circumference R1 side and the outer circumference R2 side. The portion 92 of the cylindrical material 91 is cut from the remaining portion 93 of the cylindrical material 91 and separated.
Therefore, using the first cutting blade 30 and the second cutting blade 40 to use the third cutting blade 50 as a dedicated cutting blade for cutting and separating the portion 92 of the cylindrical material 91. The separation process is easier to realize than when the cylindrical material portion 92 is cut and separated. In addition, the finish of the end face of the ring-shaped part 94 is clean.

In the method of manufacturing a ring-shaped part according to this embodiment, the first cutting edge 30, the second cutting edge 40 and the third cutting edge 50 are simultaneously gripped in the inner cutting step, the outer cutting step and the separation step. Processing to the cylindrical material 91 using the processing device 22 having the blade moving mechanism 15 (16, 17, 18) moving in the lateral direction (depth direction) D2 perpendicular to the axial direction D1 and the axial direction D1 Do.
Therefore, at the time of process change of an inner side cutting process, an outer side cutting process, and a separation process, exchange of a cutting blade is unnecessary. Therefore, the time lag between processes can be reduced, and the resin ring-shaped part 94 can be produced more efficiently.

[Modification]
The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments described above, and can be implemented in various forms.
For example, the outer cutting step can be performed before the inner cutting step, and the outer cutting step can be performed simultaneously with the inner cutting step. The cylindrical blank may be moved axially without moving the cutting blade axially, or both may be moved axially relative to each other.

  In addition, the third cutting blade 50 is omitted, and a cylinder which is rotated using the first cutting blade 30 or the second cutting blade 40 in the separation step and is cut on the inner circumference R1 side and the outer circumference R2 side The portion 92 of the bar-shaped material 91 may be cut and separated from the remaining portion 93 of the cylindrical material 91.

  The direction in which any one or more of the first cutting blade 30, the second cutting blade 40, and the third cutting blade 50 extends is not limited to the lateral direction and the depth direction D2, and is, for example, the vertical direction D3 It is also good. In that case, any one or more of the first cutting edge 30, the second cutting edge 40, and the third cutting edge 50 move in the vertical direction.

  Instead of holding the first cutting blade 30, the second cutting blade 40, and the third cutting blade 50 simultaneously in the ring-shaped part manufacturing apparatus 1, the cutting blade is cut using an automatic tool changer having a turret or the like. It is also possible to sequentially replace, or to remove and replace the cutting edge one by one each time the inner cutting process, the outer cutting process and the separation process.

DESCRIPTION OF SYMBOLS 1 manufacturing apparatus 14 material rotation mechanism part 11 1st cutting blade movement mechanism part 12 2nd cutting blade movement mechanism part 13 3rd cutting blade movement mechanism part 15 cutting material movement mechanism part 22 processing apparatus 30 1st cutting blade 40 2nd Cutting blade 50 third cutting blade 91 cylindrical material 91a one end 91b other end 91c thickness center 92 part 93 remaining part 94 ring-shaped part D1 axial direction, spindle direction D2 lateral direction, depth direction D3 vertical direction D4 radial direction R1 inner circumference R2 perimeter

Claims (5)

A rotation step of rotating a cylindrical resin-made material about its axial direction;
The first cutting blade is moved in the radial direction of the cylindrical material from a state in which the first cutting blade is placed against the thickness center of one end of the cylindrical material rotating in the rotation step, and the cylindrical material is axially moved. An inner cutting step of cutting the inner peripheral side of the cylindrical material by relatively moving it to the other end side of
Before, after or simultaneously with the inner cutting step, the second cutting blade is moved in the radial direction of the cylindrical material from the state where the second cutting blade is applied to the thickness center of the one end of the rotating cylindrical material. An outer cutting step of cutting an outer peripheral side of the cylindrical material by moving the cylindrical material relative to the other end side in the axial direction;
After the inner cutting step and the outer cutting step, the portion of the cylindrical material cut on the inner and outer peripheral sides is cut and separated from the remaining portion of the cylindrical material to have a substantially circular cross section A separation step to obtain a ring-like part;
A method of manufacturing a ring-shaped part, comprising:   In the separation step, a third cutting blade is brought into contact with the other end side of the portion of the cylindrical material which is rotating and is cut on the inner and outer peripheral sides, and the portion of the cylindrical material is The method for manufacturing a ring-shaped part according to claim 1, wherein the ring-shaped part is cut and separated from the remainder of the cylindrical material.   In the inner cutting step, the outer cutting step, and the separation step, the first cutting edge, the second cutting edge and the third cutting edge are simultaneously gripped and transversely perpendicular to the axial direction and the axial direction The manufacturing method of the ring-shaped part of Claim 2 which processes to the said cylindrical material using the processing apparatus which has a blade moving mechanism part which moves to direction.   The method for producing a ring-shaped part according to any one of claims 1 to 3, wherein the resin is a fluorine resin. A material rotation mechanism that rotates a cylindrical resin material around its axial direction;
A first cutting blade moving mechanism for moving a first cutting blade, wherein the first cutting blade is placed against the thickness center of one end of the cylindrical material being rotated by the material rotating mechanism. The first cutting blade moving mechanism which cuts the inner peripheral side of the cylindrical material by moving the cylindrical material in the radial direction from the state and moving it in the axial direction toward the other end of the cylindrical material. Department,
A second cutting blade moving mechanism for moving a second cutting blade, wherein the second cutting blade is placed on the thickness center of the one end of the rotating cylindrical material, A second cutting blade moving mechanism that cuts the outer peripheral side of the cylindrical material by moving the cylindrical material radially of the cylindrical material and moving it in the axial direction toward the other end of the cylindrical material;
A third cutting blade moving mechanism for moving a third cutting blade, wherein the third cutting blade moving mechanism is provided on the side of the other end of the portion of the cylindrical material which is cut and rotated on the inner peripheral side and the outer peripheral side. A third cutting blade moving mechanism for obtaining a ring-shaped part having a substantially circular cross section by applying a cutting blade to cut and separate a portion of the cylindrical material from the remaining part of the cylindrical material;
An apparatus for manufacturing a ring-shaped part, comprising:

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