JP2009208160A - Diameter variable tool serving both for boring and horning - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diameter variable tool serving both for boring and horning capable of performing cutting work and horning work with a single machine. <P>SOLUTION: The diameter variable tool serving both for boring and horning is constituted of: a tool body 31 equipped with a semi-finishing member 35 having bites 35b and 36b attached, a finishing member 36 and a horning member 37 having a whetstone 37b fixed, which are provided in the circumferential direction; a tool-side draw bar 32 supported to be capable of going back and forth on a spindle hole 31a of the tool body 31; a whetstone expanding plate 41 including a semi-finishing tapered surface 32b provided on the draw bar 32, a finishing tapered surface 32c and slopes 41a and 41b; a taper transmission pin 39; and a whetstone interlocking pin 42. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a variable diameter tool for both boring and honing.

  A tool is mounted on the spindle of a machine tool, and drilling is performed on a metal workpiece using this tool, such as rough finishing, intermediate finishing, and finishing using a bite. Thereafter, honing may be performed to finish the surface using a grindstone on the inner surface of a hole formed in the workpiece by boring. When performing the honing process, for example, a roughing machining process, a semi-finishing process, a finishing process, and the like were performed using a plurality of tools on a boring machine such as a machining center having an automatic tool change function. Thereafter, the workpiece is reattached from a boring machine to a honing machine such as a honing machine, and the inner surface of the hole formed in the workpiece is finished.

  As a tool for performing the above-described boring processing, a boring tool provided with wear correction means for correcting wear of a cutting tool is known (for example, see Patent Documents 1 and 2).

Utility Model Registration No. 2539476 Utility Model Registration No. 2539477

  However, as described above, since different machines must be used for boring processing and honing processing, there is a problem that the processing work is complicated, and improvement in workability has been demanded. In addition, the use of a plurality of expensive machines increases the cost of processing, and thus a reduction in cost has been demanded.

  For this reason, the present invention can automatically change tools, and can be used for boring and honing, which enables variable diameter machining of holes, such as cutting and honing, with a single machine. An object is to provide a radial tool.

  The variable diameter tool combined with boring and honing according to the first invention for solving the above-mentioned problems is a first processed member having a cutting tool attached to a radially outer end and a grindstone on a radially outer peripheral surface. A tool main body in which the fixed second processing member is disposed in the circumferential direction, a drive shaft that is slidably supported in a shaft hole of the tool main body, and the first processing member and the drive shaft. A first inclined portion that is provided between and inclined along the axial direction; and an angle different from that of the first inclined portion provided between the second processed member and the drive shaft along the axial direction. An inclined second inclined portion, a first transmission means interposed between the first processed member and the second inclined portion, the second processed member and the second inclined portion A second transmission means interposed between the first processing member and the second processing member. Material is characterized in that it is drawn so each radially before with the reverse of the drive shaft.

  The boring and honing variable diameter tool according to the second invention for solving the above problems is the boring and honing variable diameter tool according to the first invention, wherein the first machining member is: An angle corresponding to the intermediate finishing workpiece of the first inclined portion, comprising a plurality of intermediate finishing workpieces to which intermediate finishing tools are attached and one finishing workpiece to which a finishing bit is attached; The angle corresponding to the finishing workpiece is different.

  The boring and honing variable diameter tool according to the third invention for solving the above-mentioned problems is the boring and honing variable diameter tool according to the first aspect of the invention. The surface facing the inclined portion has the same inclination angle as the second inclined portion, and the second transmission means moves the second processing member in the radial direction in conjunction with the movement of the drive shaft. It is characterized by making it.

  The boring and honing variable diameter tool according to the fourth aspect of the present invention for solving the above-mentioned problems is the boring and honing variable diameter tool according to the first aspect of the present invention. A pressing means for urging the shaft toward the main shaft is provided.

  A boring and honing variable diameter tool according to a fifth aspect of the present invention for solving the above problems is the boring and honing variable diameter tool according to the first aspect of the invention, wherein the tool main body is the tool main body. Tool-side measurement air that is connected to a measurement air nozzle ejection port provided at a position opposite to each other across the axis of the peripheral wall of the peripheral wall and is supplied with measurement air from a main-axis-side measurement air supply passage formed in the main shaft A supply path is provided.

  According to the boring and honing variable diameter tool according to the first invention described above, a tool and a grindstone can be attached to one tool, and the radial positions of the tool and the grindstone can be changed in conjunction with each other. , Boring with a tool and honing with a grindstone can be performed with a single tool, and it is not necessary to use a honing machine, improving workability and reducing machining costs. .

  Further, according to the boring and honing variable diameter tool according to the second invention described above, in the boring and honing variable diameter tool according to the first invention, the first machining member is a semi-finishing bite. A plurality of intermediate finishing blade portions to which a finishing bite is attached, and an angle of the first inclined portion facing the intermediate finishing blade portion, Since the angle of the second inclined portion facing the finishing blade portion is different, intermediate finishing, finishing and honing can be performed with one tool.

  Moreover, according to the boring process and honing process variable diameter tool which concern on 3rd invention mentioned above, in the boring process and honing process variable diameter tool which concern on 1st invention, the said inclination part of said 2nd process member And the second transmission means moves the second processing member in the radial direction in conjunction with the movement of the drive shaft. Therefore, the second processed member can be smoothly expanded and contracted in the radial direction in accordance with the forward and backward movement of the tool side drive shaft.

  Further, according to the boring and honing variable diameter tool according to the fourth invention described above, in the boring and honing variable diameter tool according to the first invention, the driving shaft is disposed at the tip of the driving shaft. Since the pressing means for biasing the main shaft side is provided, the drive shaft can be moved to the main shaft side more quickly.

  Further, according to the boring and honing variable diameter tool according to the fifth invention described above, in the boring and honing variable diameter tool according to the first invention, the tool main body is a peripheral wall of the tool main body. A tool-side measurement air supply path that is connected to an ejection port of a measurement air nozzle provided at a position opposite to each other across the axis of the shaft and is supplied with measurement air from a spindle-side measurement air supply path formed on the spindle Therefore, in addition to boring with a tool and honing with a grindstone with one tool, it is possible to measure the inner diameter of the workpiece, and the workability is further improved.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a spindle device to which a variable diameter tool for boring and honing according to the present embodiment is applied, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is an enlarged view of a main part of FIG. 4 is a sectional view showing a variable diameter tool for both boring and honing according to this embodiment, FIG. 5 is another sectional view for a variable diameter tool for both boring and honing according to the present embodiment, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 4, FIG. 7 is a cross-sectional view taken along the line B-B of FIG. 4, and FIGS. 8 to 10 are the variable diameter tools combined with the boring and honing processes shown in FIGS. FIG. 11 to FIG. 13 are sectional views showing still another state of the variable diameter tool combined with boring and honing shown in FIGS.

  As shown in FIGS. 1 and 2, a spindle device 1 to which a variable diameter tool (hereinafter simply referred to as “tool”) 2 for boring and honing according to the present embodiment is applied includes a bearing 12 in a housing 11. And a main shaft side draw bar 14 that is inserted into a shaft hole 13a formed on the axis of the main shaft 13 so as to be able to move forward and backward.

  The spindle 13 is provided with a clamp mechanism 16 that draws a tool holder 15 at the tip, and allows the tool holder 15 to rotate integrally with the spindle 13, and two measurement air supplies that penetrate the peripheral wall along the axial direction. The channel 13b is drilled so as to face each other with the shaft center interposed therebetween. The main shaft 13 is rotationally driven by a main shaft driving motor 19 as a first driving means via a main shaft side transmission gear 17 and a main shaft driving motor side transmission gear 18.

  The measurement air supply path 13b is disposed so as to face a measurement air supply path 31d (described later) formed in the tool 2 at the distal end side (end on the tool side), and also on the base end side (the end opposite to the tool side). Of the air micrometer for supplying the measurement air to the measurement air supply path 13b.

  The air supply connection unit 20 is configured to be capable of moving back and forth in the axial direction by hydraulic pressure, and when moved to the tool side, the ball 20c of the ball check valve 20b provided at the tip of the measurement air passage 20a comes into contact with the main shaft 13 side. The measurement air passage 20a is released by being pressed. Thereby, the measurement air injected from the air supply part 21 can be supplied to the measurement air supply path 13b. In the example shown in FIGS. 1 to 3, one measurement air supply unit 21 supplies measurement air to the lower measurement air supply path 13b in the drawing, and the other measurement air supply unit 21 has the upper measurement air in the drawing. It is comprised so that measurement air may be supplied to the supply path 13b.

  The spindle-side draw bar 14 is configured to clamp the tool holder 15 integrally with the spindle 13 by pulling the small diameter portion 15a on the end face of the tool holder 15 with the clamp mechanism 16 at the tip thereof. A coolant supply passage 14a for supplying coolant to the tool 2 side is provided, and a total joint 24 to which a hose (not shown) for supplying coolant is connected is attached to the base end portion. The base end side of the main shaft side draw bar 14 is supported by a draw bar drive shaft 23 via a bearing 22.

  The draw bar drive shaft 23 is formed with a screw portion 23a on its peripheral surface and is configured to be screwed into a nut 25 fixed to the housing 11 side, while the draw bar drive shaft side transmission gear 26 and the draw bar drive motor side. It is configured to be rotationally driven by a draw bar drive motor 28 via a transmission gear 27.

  That is, when the draw bar drive shaft 23 is rotationally driven by the draw bar drive motor 28, the screw portion 23a is screwed into the nut 25 and moves in the axial direction. At this time, since the draw bar drive shaft 23 supports the main shaft side draw bar 14 via the bearing 22, the rotation of the draw bar drive shaft 23 is not transmitted to the main shaft side draw bar 14, but only the movement in the axial direction is transmitted. .

  That is, when the drawbar drive shaft 23 is rotationally driven by the drawbar drive motor 28, the main shaft side drawbar 14 only moves in the axial direction while being separated from the drawbar drive shaft 23. By moving the main shaft side draw bar 14 in the axial direction in this way, a tool side draw bar which will be described later is detachably connected to the main shaft side draw bar 14 via a collet 30 that opens and closes by moving the main shaft side draw bar 14 back and forth. 32 can be driven in the axial direction.

  As shown in FIGS. 4 to 7, the tool 2 according to the present embodiment mainly has a tool body 31 and a shaft hole 31 a on the axis of the tool body 31 along the axial direction. The tool side draw bar 32 is supported so as to be able to move forward and backward, and a plurality of blade portions and a grindstone, which will be described later, provided on the tool main body 31.

  The tool body 31 is formed with a coolant supply path 31c serving as a coolant flow path on the peripheral wall 31b, and two measurement air supply paths that are formed so as to face each other with an axial center interposed therebetween. 31d. The coolant supply path 31 c has an end on the main shaft side opened in the surface of the shaft hole 31 a of the tool body 31 and the other end extending toward the tip side of the tool body 31. The measurement air supply path 31d is arranged so that the opening on the main shaft side faces the measurement air supply path 13b formed on the main shaft 13, and the opening on the tool tip side is provided on the peripheral wall 31b of the tool body 31. The measurement air nozzle 33 communicates with the measurement air nozzle 33. Further, the tool main body 31 includes a detent mechanism 34 for rotating the tool side draw bar 32 forward and backward relative to the tool main body 31 and integrally.

  And in this tool main body 31, the three finishing members 35 and the one finishing member 36 as the 1st processing members which are the blade parts mentioned above, and the four honing members as the 2nd processing members 37 is attached so as to be movable in the radial direction.

  As shown in FIGS. 6 and 7, the intermediate finishing member 35, the finishing member 36, and the honing member 37 are arranged such that the intermediate finishing member 35 and the finishing member 36 are arranged at equal intervals in the circumferential direction. In addition, the honing members 37 are arranged at equal intervals between these members.

  Moreover, the tool side draw bar 32 is provided with a coolant supply path 32a for supplying coolant to the coolant supply path 31c of the tool body 31 described above on its axis. The coolant supply path 32 a communicates with the opening of the coolant supply path 14 a of the main shaft side draw bar 14 at the tip end side thereof, while the opening at the tool tip side is on the shaft hole 31 a side of the coolant supply path 31 c of the tool body 31. Opposite the opening. Thereby, it is comprised so that the coolant supplied from the spindle apparatus 1 side may be supplied to a process part.

  As shown in FIG. 4, the intermediate finishing member 35 includes a columnar intermediate finishing bit holder 35a extending in the axial direction and an intermediate finishing bit 35b fixed to the intermediate finishing bit holder 35a. The base end side (right side in FIG. 4) of the intermediate finish bit holder 35a is fixed to the tool main body 31 by a screw 38 (see FIG. 6), while the tool tip side is closer to the screw 38 on the surface facing the tool main body 31. In addition, it has a notch 35c formed along a direction orthogonal to the axial direction. The intermediate finish bit 35b is attached to the outer side in the radial direction on the tool tip side from the notch 35c of the intermediate finish bit holding portion 35a.

  Similarly, the finishing member 36 includes a columnar finishing tool holder 36a extending in the axial direction and a finishing tool 36b fixed to the finishing tool holder 36a. The finishing tool holding portion 36a is fixed to the tool body 31 by a screw 38 on the base end side (right side in FIG. 4), and orthogonal to the tool tip side from the screw 38 on the surface facing the tool body 31 in the axial direction. The finishing bit 36b is attached to the outer side in the radial direction on the distal end side of the notch 36c of the finishing bit holder 36a.

  An inclined portion (hereinafter referred to as an “inclined portion”) is formed on the outer peripheral surface of the tool-side draw bar 32 and facing the finishing member 35 and on the outer peripheral surface of the tool-side draw bar 32 and facing the finishing member 36. , 32b and 32c, which are respectively referred to as a taper surface for intermediate finishing and a taper surface for finishing).

  In the present embodiment, the taper surface 32b for the finishing member is inclined so that the distance from the axis gradually increases from the main shaft side to the tool tip side (for example, an inclination angle of 2 degrees). Further, the taper surface 32c for the finishing member is inclined so that the distance from the axial center gradually increases toward the tool tip within the movable range of the spindle side draw bar 14 relative to the tool body 31 from the spindle side (for example, an inclination angle of 3 degrees). Further, the tool tip side is inclined so that the distance from the axial center gradually decreases toward the tool tip side. That is, the inclination angle of the finishing member taper surface 32c is larger than that of the intermediate finishing member taper surface 32b.

  The intermediate finish tool holding portion 35a and the intermediate finish member taper surface 32b and between the finish tool holding portion 36a and the finish member taper surface 32c are provided so as to penetrate in the radial direction. In addition, a taper transmission pin 39 as a first transmission means is interposed. The taper transmission pin 39 slides two hemispherical bodies 39 a and an interposition member 39 b interposed between the cylindrical holding member 40 fixed to the tool body 31 in the longitudinal direction of the holding member 40. It is configured to be movably accommodated. The hemispherical bodies 39a are arranged such that their spherical portions are in contact with the interposition members 39b, and the flat portions are for the intermediate finishing tool holding portion 35a or the intermediate finishing member tapered surface 32b, or the finishing tool holding portion 36a or the finishing member. It abuts on the tapered surface 32c.

  Further, as shown in FIG. 5, the honing member 37 includes a grindstone holding portion 37a formed in a plate shape, and a grindstone 37b fixed to the outer circumferential surface of the grindstone holding portion 37a. 31 is configured to penetrate the tool body 31 in the radial direction and to be slidable in the radial direction. The grindstone holding portion 37a is provided with two inclined surfaces 37c and 37d on the surface facing the tool-side draw bar 32 with the radial width gradually decreasing from the main shaft side to the tool tip side with the stepped portion interposed therebetween. 5 is a view taken along the line CC in FIG.

  Further, a grindstone expansion plate 41 is provided between the honing member 37 and the tool side draw bar 32. The grindstone expansion plate 41 has substantially the same thickness as the grindstone holding portion 37 a, and the step is so that the outer peripheral surface of the grindstone expansion plate 41 has substantially the same shape as the inner peripheral surface of the honing member 37. There are two inclined surfaces 41a and 41b that are inclined so that the radial width gradually decreases from the main shaft side to the tool tip side with the portion interposed therebetween. The grindstone expansion plate 41 is attached to the surface of the tool side draw bar 32.

  A grindstone interlocking pin 42 as a second transmission means is fixed to the grindstone expansion plate 41 such that one end protrudes from a step portion of the grindstone expansion plate 41, and the grindstone retaining portion 37a is interlocked with the grindstone. A hole 37e is formed to slidably fit a portion protruding from the grindstone expansion plate 41 of the pin 42 for use. The grinding wheel interlocking pin 42 and the hole 37e are provided so as to extend in parallel with the inclined surfaces 37c and 37d of the honing member 37 and the inclined surfaces 41a and 41b of the grinding wheel expansion plate 41.

  As shown in FIGS. 4 and 5, a bottomed first cylindrical body 46 is provided at the tip of the tool body 31 so as to cover the tip of the tool side draw bar 32. A through hole is formed in the bottom of the cylindrical body 46, and a bottomed second cylindrical body 45 in which a hydraulic spring 43 serving as a pressing means is accommodated is inserted into the through hole. The hydraulic spring 43 abuts on the tip of the tool side draw bar 32 and biases the tool side draw bar 32 toward the main shaft side.

  Further, a flange portion is formed on the outer peripheral edge of the opening of the second cylindrical body 45 located inside the first cylindrical body 46, and inside the first cylindrical body 46, A disc spring 44 is interposed between the flange portion of the second cylindrical body 45 and the bottom portion of the first cylindrical body 46. The disc spring 44 urges the hydraulic spring 43 toward the tool side draw bar 32 via the second cylindrical body 45.

  Below, the procedure of the drilling process by the machine tool to which the tool 2 according to the present embodiment is applied will be described.

  When processing a workpiece (workpiece) in the machine tool equipped with the tool 2 according to the present embodiment, first, the drawbar drive motor 23 is rotationally driven by the drawbar drive motor 28, and the tool is driven via the spindle side drawbar 14. The side draw bar 32 is moved to the intermediate finish machining position (the position shown in FIGS. 8 to 10 in this embodiment) (hereinafter, this state is referred to as the intermediate finish machining arrangement).

  As shown in FIGS. 8 and 10, in the semi-finishing processing arrangement, the taper transmission pins 39 of the taper surface 32b for the finishing member and the taper surface 32c for the finishing member are respectively compared with the state shown in FIGS. The width in the radial direction at the position opposite to is increased. Therefore, the taper transmission pin 39 that is in contact with the taper surface 32b for the intermediate finish member and the taper surface 32c for the finish member slides radially inside the holding member 40, and finishes the intermediate finish bit holder 35a. The positions corresponding to the intermediate finishing bit 35b and the finishing bit 36b of the bit holding part 36a are pressed.

  Here, as described above, the intermediate finish bit holder 35a is screwed at the base end side of the intermediate finish bit holder 35a, in other words, at a position deviated with respect to the axial width. And has a notch 35c on the surface 41f facing the tool side draw bar 32. For this reason, when pressed by the taper transmission pin 39, the portion on the side of the intermediate finishing bit 35b mainly undergoes elastic deformation from the notch 35c, and accordingly, the intermediate finishing bit 35b moves outward in the radial direction.

  Similarly, the finishing bit holder 36a is fixed to the tool body 31 by being screwed at the base end side, that is, a position deviated with respect to the axial width, and is attached to the tool side draw bar 32. Since the opposed surface 42f has the notch 36c, when pressed by the taper transmission pin 39, the portion on the side of the finishing bit 36b from the notch 36c mainly undergoes elastic deformation, and the finish is accordingly accompanied. The cutting tool 36b moves radially outward.

  At this time, the taper surface 32b for the finishing member and the taper surface 32c for the finishing member have different inclination angles, and the width in the radial direction of the position facing the taper transmission pin 39 of the taper surface 32b for the finishing member is the finishing member. The taper surface 32c is larger than the radial width at the position facing the taper transmission pin 39. Therefore, in the intermediate finish machining arrangement, the intermediate finish bit 35b protrudes radially outward as compared to the finish bit 36b.

  Further, as shown in FIGS. 9 and 10, the honing member 37 moves to the grindstone expansion plate 41 side, that is, radially inward as compared with the state shown in FIG. 5, and the surface of the grindstone 37b is at least semi-finished. It will be in the state located in the diameter direction inner side from the outer diameter of the cutting tool 35b.

  That is, in the intermediate finish machining arrangement, the tool side draw bar 32 is moved so that the outer diameter of the intermediate finish bit 35b is larger than the outer diameters of the finish bit 36b and the grindstone 37b. For example, the outer diameter of the intermediate finishing bit 35b is set to be smaller by about 0.1 mm than the required completed diameter.

  As described above, when the tool-side draw bar 32 is moved to the intermediate finish machining position, the spindle 13 is rotationally driven by the spindle drive motor 19, and the workpiece is subjected to intermediate finish machining with the intermediate finish bit 35b.

  When the intermediate finishing process is completed, the draw bar drive motor 28 is rotationally driven by the draw bar drive motor 28 while maintaining the rotation of the main spindle 13, and the tool side draw bar 32 is finished through the main spindle side draw bar 14 (this embodiment). In the embodiment, it is assumed that the state is moved back to the position shown in FIG. 11 to FIG. 13 (hereinafter, such a state is referred to as finishing processing arrangement).

  When the tool side draw bar 32 is moved from the intermediate finish machining arrangement to the finishing machining arrangement, the tool side draw bar 32 is urged toward the spindle side by the hydraulic spring 43 and the disc spring 44, so that the spindle side draw bar is connected via the collet 30. The tool side draw bar 32 connected to the main shaft side draw bar 14 can be made to follow the positive side.

  As shown in FIGS. 11 and 13, in the finish processing arrangement, the taper transmission pins 39 of the intermediate finish member taper surface 32b and the finish member taper surface 32c are further compared to the states shown in FIGS. The width in the radial direction at the position opposite to is increased. Accordingly, the taper transmission pin 39 that is in contact with the taper surface 32b for the finishing member and the taper surface 32c for the finishing member further slides in the holding member 40 toward the outside in the radial direction, so that the intermediate finishing bit holder is provided. 35a, and a position substantially corresponding to the finishing bit 35b and the finishing bit 36b of the finishing bit holding part 36a is further pressed.

  As a result, the intermediate finishing bit 35b is further elastically deformed from the notch 35c to the side of the intermediate finishing bit 35b, so that the intermediate finishing bit 35b is moved outward in the radial direction. Similarly, in the finishing bit 36b, the elastic deformation of the portion on the side of the finishing bit 36b from the notch 36c is increased, and the finishing bit 36b is moved outward in the radial direction.

  At this time, the taper surface 32b for the intermediate finish member and the taper surface 32c for the finish member are different from the case of the intermediate finish machining arrangement shown in FIGS. The radial width of the position facing the taper transmission pin 39 of 32b is smaller than the radial width of the position facing the taper transmission pin 39 of the finish member taper surface 32c. Therefore, in the finishing processing arrangement, the finishing bit 36b protrudes outward in the radial direction as compared with the intermediate finishing bit 35b.

  Further, as shown in FIG. 12, the honing member 37 moves to the grindstone expansion plate 41 side (in the radial direction) as compared with the state shown in FIG. 10, and the surface of the grindstone 37b is outside the finishing bit 36b. The state of being located radially inward from the diameter is maintained.

  As described above, in the finish processing arrangement, the tool-side draw bar 32 is moved so that the outer diameter of the finishing bit 36b is larger than the outer diameters of the intermediate finishing bit 35b and the grindstone 37b. For example, the outer diameter of the finishing bit 36b is set to the completed diameter.

  When finishing is performed in this manner, the draw bar drive shaft 23 is rotationally driven by the draw bar drive motor 28, and the tool side draw bar 32 is advanced (for example, to the intermediate finish machining position) via the spindle side draw bar 14. As a result, the radial width of the taper surface 32b for the intermediate finish member and the tapered surface 32c for the finish member facing the taper transmission pin 39 decreases in the radial direction, and the taper transmission pin 39 slides radially inward within the holding member 40. While moving, the elastically deformed portions of the intermediate finish bit holder 35a and the finish bit holder 36a move in the axial direction by the restoring force. As a result, the intermediate finishing bit 35b and the finishing bit 36b move inward in the radial direction as compared with the state shown in FIGS.

  Subsequently, after stopping the spindle drive motor 19 and stopping the rotation of the spindle 13, the diameter of the hole formed in the workpiece is measured using an air micrometer.

  Below, the measurement of the hole diameter by an air micrometer will be briefly described. When measuring the hole diameter with the air micrometer, when the measurement command is output from the NC device 3 shown in FIG. 3 to the sequencer 29c and the measurement command signal is output from the sequencer 29c to the control device 29b, the control device 29b Thus, control of the A / D converter 29a, the measurement air supply source 29d, and the air supply connection unit 20 is started. When the air supply connection unit 20 is moved to the tool 2 side by the hydraulic pressure, the measurement air supplied from the measurement air supply source 29d via the A / D converter 29a passes through the measurement air supply path 13b and the measurement air supply path 31d. And then ejected from the ejection port of the measurement air nozzle 33.

  At this time, the A / D converter 29a detects the pressure of the measurement air (corresponding to the flow rate of the measurement air) and outputs this detection signal to the control device 29b. The control device 29b obtains the flow rate of the measurement air from the pressure detection signal output from the A / D converter 29a, and represents the relationship between the flow rate of the measurement air and the previously stored measurement air flow rate and the hole diameter. The diameter of the processed hole of the object to be measured is obtained based on the data.

  When the measurement by the air micrometer is completed, the draw bar drive shaft 23 is rotationally driven by the spindle drive motor 19 based on the measurement result, and the tool side draw bar 32 is moved to the honing position (in this embodiment) via the spindle side draw bar 14. 4 to 6) (hereinafter, such a state is referred to as a honing process arrangement).

  As shown in FIGS. 4 to 6, in the honing process arrangement, the taper transmission pins 39 of the finishing member taper surface 32 b and the finishing member taper surface 32 c are respectively compared to the states shown in FIGS. 8 to 10. The width in the radial direction at the facing position is reduced. Therefore, the taper transmission pin 39 that is in contact with the taper surface 32b for the intermediate finish member and the taper surface 32c for the finish member slides further inward in the radial direction inside the holding member 40 and is accommodated in the tool body 31. It becomes a state.

  As a result, the intermediate finish bit holder 35a and the finish bit holder 36a return to their original shapes even after the elastic deformation is eliminated, and the intermediate finish bit 35b and the finish bit 36b are compared to the intermediate finish processing arrangement and the finishing processing arrangement. It will be in the state which moved to the diameter direction inside.

  In contrast, the honing member 37 moves radially outward along the inclined portions 41a and 41b of the grindstone expansion plate 41, and the honing member 37 moves radially outward. As a result, the outer diameter of the grindstone 37b protrudes outward in the radial direction as compared with the outer diameters of the intermediate finishing bit 35b and the finishing bit 36b.

  Thus, in the honing processing arrangement, the tool side draw bar 32 is moved so that the outer diameter of the grindstone 37b is larger than the outer diameters of the intermediate finishing bit 35b and the finishing bit 36b. For example, the outer diameter of the grindstone 37b is set to be about the completed diameter +20 μm.

  Furthermore, in this embodiment, when performing honing, the diameter of the hole in the workpiece is constantly monitored using an air micrometer, and the position of the tool side draw bar 32 is corrected by the draw bar drive motor 28 according to the machining state. However, honing is performed until the hole diameter of the workpiece reaches the required dimension.

  When the diameter of the hole in the workpiece reaches a predetermined dimension as measured by the air micrometer, the position of the tool-side draw bar 32 is retracted to the intermediate finish machining position shown in FIGS. 8 to 10 by using the draw bar drive motor 28, for example. Let

  Here, when the spindle side draw bar 14 is retracted from the honing position, the grindstone expansion plate 41 moves toward the spindle side with respect to the honing member 37. Since the honing member 37 and the grindstone expansion plate 41 are connected by the grindstone interlocking pin 42, when the honing member 37 moves as described above, the grindstone interlocking pin 42 enters the hole 37e, and accordingly By moving the honing member 37 so as to be pulled radially inward, the honing member 37 moves radially inward.

  When the outer diameter of the grindstone 37b is reduced in this way, the main shaft drive motor 19 is stopped to stop the rotation of the main shaft 13, and the processing is completed.

  As described above, according to the boring and honing variable diameter tool according to the present embodiment, a series of processing steps from boring with a bite to honing using a grindstone is performed by, for example, a single machining center or the like. Since it can be performed with a machine tool, it is possible to further improve workability and reduce the cost for processing.

  The present invention is applicable to a variable diameter tool for both boring and honing.

It is a fragmentary sectional view which shows the structure of the whole spindle apparatus of the machine tool which concerns on one Embodiment of this invention. 1 is a structural cross-sectional view showing a main shaft of a main shaft device according to an embodiment of the present invention. FIG. 3 is an enlarged view of a main part of FIG. 2. It is sectional drawing which shows an example of the tool with which the spindle apparatus which concerns on one Embodiment of this invention is mounted | worn. FIG. 5 is another cross-sectional view of the tool shown in FIG. 4. It is AA arrow sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing which shows the state which retracted the draw bar in the tool shown in FIG. FIG. 9 is another cross-sectional view of the tool shown in FIG. 8. It is sectional drawing which shows the state which retracted the draw bar in the tool shown in FIG. It is sectional drawing which shows the state which further retracted | drawn the draw bar in the tool shown in FIG. FIG. 12 is another cross-sectional view of the tool shown in FIG. 11. It is sectional drawing which shows the state which further retracted the draw bar in the tool shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spindle device 2 Tool 11 Housing 12 Bearing 13 Spindle 13a Shaft hole 13b Measurement air supply path 14 Spindle side draw bar 19 Spindle drive motor 20a Measurement air passage 21 Air supply part 22 Bearing 23 Drawbar drive shaft 26 Drawbar drive shaft side transmission gear 27 Drawbar Drive motor side transmission gear 28 Drawbar drive motor 30 Collet 31 Tool body 31a Shaft hole 31b Peripheral wall 31d Measurement air supply path 32 Tool side drawbar 32b Tapering surface for finishing 32c Tapering surface for finishing 33 Measuring air nozzle 35 Medium finishing member 35a Finishing tool holding part 35b Middle finishing tool 35c Notch part 36 Finishing member 36a Finishing tool holding part 36b Finishing tool holding part 36c Notch part 37 Honing member 7a whetstone holding portion 37b grindstone 37c, 37d inclined surface 38 screw 39 taper transmission pin 41 wheel expanding plates 41a, 41b inclined surface 42 whetstone interlocking pin 37e hole 43 hydraulic spring 44 disc spring

Claims (5)

A tool body in which a first processing member having a cutting tool attached to a radially outer end and a second processing member having a grindstone fixed to a radially outer peripheral surface thereof are disposed in the circumferential direction;
A drive shaft slidably supported in the shaft hole of the tool body;
A first inclined portion provided between the first processed member and the drive shaft and inclined along the axial direction;
A second inclined portion provided between the second processing member and the drive shaft and inclined at an angle different from the first inclined portion along the axial direction;
First transmission means interposed between the first processed member and the second inclined portion;
A second transmission means interposed between the second processed member and the second inclined portion;
The variable diameter tool combined with boring and honing, wherein the first machining member and the second machining member are each expanded and contracted in the radial direction as the drive shaft moves forward and backward. The first processing member is composed of a plurality of intermediate finishing processing members to which intermediate finishing tools are attached and one finishing processing member to which finishing tools are attached,
The variable diameter tool combined with boring and honing according to claim 1, wherein an angle of the first inclined portion corresponding to the finishing member is different from an angle corresponding to the finishing member. . The surface facing the inclined portion of the second processing member has the same inclination angle as the second inclined portion,
2. The variable diameter tool for both boring and honing according to claim 1, wherein the second transmission means moves the second machining member in a radial direction in conjunction with the movement of the drive shaft. The variable diameter tool for both boring and honing processing according to claim 1, further comprising pressing means for urging the driving shaft toward the main shaft at the tip of the driving shaft. The tool body communicates with an ejection port of a measurement air nozzle provided at a position facing the axis of the peripheral wall of the tool body, and measurement air is supplied from a spindle-side measurement air supply path formed on the spindle. A variable-diameter tool for both boring and honing processing according to claim 1, further comprising a tool-side measurement air supply path to which the bore is supplied.

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