JP2009019699A - Machine component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide machine components which enable to execute work for press fitting of positioning-taper-pins and work for releasing the press-fit to be performed from only either side of two machine parts, keep the taper-pins not necessarily protruded to the outside of the machine part, and dispense with work for nut-screwing. <P>SOLUTION: The machine components include a first machine part having a through taper-bore, a second machine part having a bottomed taper-bore, and positioning taper-pins which are used in positioning the two machine-parts, and inserted through the taper-bores. A through hole is made axially in each of the taper pins, and an internal thread is formed axially at least partly in the through hole. An internal thread having a smaller diameter than that of the above internal thread is formed in the bottom part of the each taper-bore of the second machine-part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  It is a technique related to positioning of two machine parts, and relates to positioning using a taper pin.

A taper pin is used to position the two machine parts relative to each other, and the taper pin inserted across the taper hole of the two machine parts is inserted along the taper hole, and accurately. Positioning can be performed with good reproducibility. In the gazette of patent document 1, the taper hole which penetrated two machine parts is formed, respectively, the taper hole which straddles two machine parts is formed, and a taper pin is inserted in this taper hole which straddles. The taper pin has a taper portion in the axial direction thereof, and a pair of male screw portions connected to both ends of the taper portion, each pair having a smaller diameter than each end portion of the taper portion. Yes. The taper pin is inserted into the straddling taper hole, the taper portion is inside the straddling taper hole, and the pair of male screw portions protrudes from the straddling taper hole. When positioning the two machine parts, the taper pin is inserted into the straddling taper hole, and then a nut is screwed into one of the pair of male screw portions, and the nut is tightened, so that the straddling taper hole is Press fit. As the two machine parts are inserted into the taper holes and fixed to the two machine parts, the respective taper holes follow the taper pins, so that the two machine parts are accurately connected via the taper pins. Positioned relative to each other. Also, when releasing the press-fitting of the taper pin into the taper hole, loosen or remove the nut, and screw the nut into the other of the pair of male threads to tighten the nut, thereby releasing the press-fitting of the taper pin. To do. As described above, the press-fitting operation and press-fitting operation of the taper pin are performed from one side and the other side of the two machine parts by using a tool such as a spanner, and the screw force is used, that is, the nut rotational force. Is converted into an axial force and increased.
Japanese Patent Application Laid-Open No. 8-200431

  However, the press-in operation and press-in release operation of the taper pin using the screw force can be executed only from one side of the two machine parts due to the structure of the machine, and can be used when it cannot be executed from the other side. Can not. The taper pin has a pair of male threads protruding from the taper hole in addition to the taper part that is press-fitted into the spanning taper hole for positioning, and the taper pin protrudes outside the machine part due to the structure of the machine. Cannot be used when it is difficult, or when it is difficult to screw a nut with a tool.

  In view of the above-described problems of the prior art, the object of the present invention is to perform press-fitting work and press-fitting release work of a taper pin only from one side of two machine parts in a machine element including two machine parts and a positioning taper pin. The taper pin does not necessarily have to protrude to the outside of the machine part, and the screwing of the nut is not necessary.

  The present invention has been made to achieve the above object, and includes a first machine part having a tapered hole therethrough, a second machine part having a bottomed tapered hole, and the two machines. A mechanical component including a positioning taper pin that is used when positioning a part and is inserted across the taper hole. The taper pin has a through hole in an axial direction thereof, and at least a part of the through hole has an axial direction in the axial direction. An extending female screw is formed, and a female screw having a diameter smaller than that of the female screw is formed at the bottom of the tapered hole of the second mechanical component.

  Since the female screw formed at the bottom of the taper hole of the second machine part has a smaller diameter than the female screw formed in the through hole of the taper pin, the press-fitting bolt passes through the taper pin. Thus, it is possible to be screwed into the female screw formed at the bottom of the tapered hole of the second machine part. The positioning operation between the first machine part and the second machine part is that the taper pin is inserted into the taper hole from the first machine part side, and the press-fitting bolt is screwed into the female screw formed at the bottom. Thus, the head portion of the bolt presses the end surface on the first machine component side of the taper pin, and the taper pin is press-fitted into the taper hole. Thus, the first machine part and the second machine part are accurately positioned via the taper pin. The positioning release operation between the first machine part and the second machine part is performed by removing the press-fitting bolt from the taper hole, screwing the positioning release bolt into the female thread of the taper pin, and using the tip of the bolt. The bottom part of the taper hole of the machine part 2 is pressed. The reaction force of this pressing. The taper pin is applied to the taper pin through the bolt from the bottom of the taper hole of the second machine component, and the taper pin moves to the first machine component side in the axial direction, so that the press-fitted state between the taper pin and the taper hole is eliminated. The positioning of the machine part and the second machine part is released.

  As described above, the positioning operation and the positioning release operation of the two machine parts utilize the screw force, that is, convert the rotational force of the bolt into the axial force and increase the force, It can only be performed from one side of the machine part. Therefore, the positioning operation and the positioning release operation of the two machine parts can be applied when the machine structure cannot be executed from both sides of the two machine parts, and can be executed by using the screw force. Further, since the screw is a female screw and is formed inside the taper pin, and the taper pin does not necessarily have to protrude outward, in particular, outside the first machine part, the taper pin is a machine part because of the structure of the machine. Applicable in cases where it is difficult to project the nut outside, and when it is difficult to screw a nut with a tool, positioning work for two machine parts and positioning work can be performed using screw force And

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 7 show a spindle head 50 of a machine tool provided with machine components according to an embodiment of the present invention. FIG. 1 is an overall view of a spindle head 50 partially shown in a sectional view. The spindle head 50 is mounted on a ram 1 of a machine tool via a head motor 2. 2 and 3 show a right side view and a left side view of FIG. 1, respectively, and show a state where the lid 24 is removed. 4 shows a plan view seen from the P viewing direction in FIG. FIG. 5 is a partially enlarged view of FIG. 1 and shows the periphery of the spindle 9 of the spindle head 50. 6 shows a state in which the spindle head 50 is removed from the head motor 2 in FIG. 2 for positioning the frame 4 and the support stud 5 constituting the spindle head 50 and the frame 4 and the support stud 6 respectively. The positioning work of the frame 4 and the support stud 5 and the positioning release work are shown. FIG. 7 shows a top view of the frame 4 in a state where the support stud 5 and the support stud 6 are arranged, and a taper pin hole 4a for positioning the frame 4 and the support stud 5 and the frame 4 and the support stud 6 respectively. 5a, 6a and their arrangement are shown.

  The spindle head 50 is mounted via a head motor 2 on a ram 1 of a machine tool provided facing a processing table (not shown) on which a workpiece is placed. The ram 1 is movable in three axial directions, ie, the X-axis direction, the Y-axis direction, and the Z-axis direction. More specifically, the head motor 2 is mounted on the lower surface of the ram 1, and the frame 4 is fixed to the head holder 3 connected to the rotating shaft of the head motor via bolts 34.

  The spindle head 50 is fixed to the frame 4 fixed to the head holder 3 and to one side and the other side of the lower surface of the frame 4, that is, on the right side and the left side in FIG. 1, and a frame portion including the frame 4, the support stud 5, and the support stud 6 is formed in an inverted U shape in FIG. 1. A spindle unit 55 is disposed between the support stud 5 and the support stud 6 and is rotatably supported by the support stud 5 and the support stud 6 as described later. The spindle unit 55 includes a spindle 10 on which a tool is mounted, a main shaft 9 that rotatably supports the spindle 10, and an internal motor (not shown) that uses the spindle 10 as a rotation axis. As shown in FIG. 2, flat surfaces 9c and 9d parallel to each other are formed on the support stud 5 side and the support stud 6 side of the main shaft 9. In the flat surfaces 9c and 9d, fitting holes 9a and 9b are formed to intersect with the axis of the main shaft 9, that is, the axis of the spindle 10, and in this embodiment are orthogonal and coaxial with each other. ing. The fitting holes 9a and 9b have flat surfaces 7b and 8b to be in contact with the flat surfaces 9c and 9d of the main shaft 9, and have fitting shaft portions 7a and 8a to be fitted into the fitting holes 9a and 9b, respectively. The drive-side fitting shaft 7 and the driven-side fitting shaft 8 to be combined are respectively fitted. Bearing holders 14 and 23 are fitted to the opposite ends of the driving-side fitting shaft 7 and the driven-side fitting shaft 8 on the side opposite to the main shaft 9, respectively. The driven-side fitting shaft 8 is formed coaxially and is fastened via bolts 37 and 38 to form an integrated object. Therefore, the drive-side fitting shaft 7 and the bearing holder 14 form a support shaft 58, and the driven-side fitting shaft 8 and the bearing holder 23 form a support shaft 59. Since the support shaft 58 and the support shaft 59 are respectively fitted in fitting holes 9a and 9b that are orthogonal to the main shaft 9 and coaxial with each other, the main shaft 9 intersects with the main shaft 9 and has an axis coaxial with each other. A pair of support shafts 58 and 59 are provided.

  The support shafts 58 and 59 are formed in a hollow shape, and supply pressure fluid, machining fluid, cooling cleaning fluid and the like for tool chucking from the outside to the spindle 10 through the shaft center portions of the support shafts 58 and 59. It is possible to pass a pipe that does not.

  Bearings 16 and 23 are fitted on the outer peripheral surfaces of the bearing holders 14 and 23, respectively, and the bearing 16 has a plurality of bolt insertion holes in the inner ring. As shown in FIGS. 2 and 3, the bolt insertion holes correspond to the plurality of bolt insertion holes respectively provided in the flanges of the bearing holders 14 and 23, the driving side fitting shaft 7, and the driven side fitting shaft 8. The plurality of bolt insertion holes correspond to the plurality of female screws 9e and 9f provided on the flat surfaces 9c and 9d of the main shaft 9, respectively.

  1, a plurality of bolts 30 are inserted through the bolt insertion holes of the bearing holder 14, the bearing 16, and the drive-side fitting shaft 7 on the side of the support stud 5 located on the right side of the main shaft 9, and the female screw 9e of the main shaft 9 is inserted. Are screwed together. Accordingly, the drive-side fitting shaft 7, the bearing 16 and the main shaft 9, that is, the support shaft 58 and the main shaft 9 are fastened to each other by the plurality of bolts 30. Similarly, on the support stud 6 side of the main shaft 9, a plurality of bolts 31 are inserted into the bolt insertion holes of the bearing holder 23, the bearing 16, and the driven side fitting shaft 8 and screwed into the female screw 9 f of the main shaft 9. ing. Thereby, the driven side fitting shaft 8, the bearing holder 23 and the main shaft 9, that is, the support shaft 59 and the main shaft 9 are fastened to each other by the plurality of bolts 31.

  In the bearing 16 in which the inner ring is fitted to the bearing holder 14, the outer ring is fitted to the support stud 5, and the bearing plate 15 is fastened to the support stud 5 via bolts 39. As a result, the outer ring of the bearing 16 is sandwiched between the support stud 5 and the bearing plate 15 and fixed to the support stud 5.

  In addition, the bearing 16 in which the inner ring is fitted to the bearing holder 23 has the outer ring fitted to the bearing holder 22, and the bearing holder has a part of the outer peripheral surface of the end flange fitted to the support stud 6. And is fastened to the support stud 6 via a bolt 42. A bearing plate 29 is fastened to the end of the bearing holder 22 via bolts 41. Thus, the outer ring of the bearing 16 is sandwiched between the bearing holder 22 and the bearing plate 29 and fixed to the support stud 6.

  The drive-side fitting shaft 7 has a sleeve 7 c that extends in the axial direction on the outer side in the radial direction and surrounds the outer ring fitting portion of the bearing 16 of the support stud 5. A rotor 13 having a plurality of magnets (not shown) is fitted to the outer peripheral surface of the sleeve 7c. A female screw is provided at the end of the rotor 13 on the main shaft 9 side, and the end of the main shaft 9 side of the rotor 13 and the side surface of the anti-main shaft 9 of the drive-side fitting shaft are located outside the bolt 30 in the radial direction. Are fastened through a plurality of bolts 32.

  The support stud 5 has a recess around the axis of the drive-side fitting shaft 7 on the outer side in the radial direction from the fitting surface of the outer ring of the bearing 16. The concave portion opens around the axis of the driving-side fitting shaft 7. The sleeve 7c of the drive side fitting shaft 7 is accommodated, and the stator holder 11 and the stator 12 described below are accommodated. The support stud 5 has an inner peripheral surface coaxial with the fitting surface of the outer ring of the bearing 16 in the outer portion in the radial direction of the recess, and the stator holder 11 is fitted to the inner peripheral surface. The stator holder 11 is fitted with a stator 12 having a plurality of winding coils (not shown). The stator 12 faces the rotor 13, and the stator holder 11 is fastened to the motor plate 18 by bolts 49. The motor plate 18 is fastened to the support stud 5 by bolts 36. Therefore, the stator holder 11 is fixed to the support stud 5 via the motor plate 18. As a result, a support shaft motor 56 having the stator 12 and the rotor 13 is formed in the recess of the support stud 5.

  In FIG. 1, the support stud 6 located on the left side of the main shaft 9 is provided with a clamp ring 21 in which the inner peripheral surface of the sleeve is fitted to the outer peripheral surface of the driven side fitting shaft 8, and the clamp ring 21 and the driven side fitting are provided. The shaft 8 is fastened via a plurality of bolts 33 positioned on the outer side in the radial direction than the bolt 31. The support stud 6 is formed with two fitting surfaces that are coaxial with the outer ring fitting surface of the bearing 16 in the bearing holder 22 in the axial direction, and the clamp cylinder 19 is fitted to one of the fitting surfaces. Then, the clamp sleeve 20 is fitted to the other fitting surface. The clamp sleeve 20 is fastened to the support stud 6 by a bolt 35 with a mounting flange. The clamp cylinder 19 is fastened to the mounting flange of the clamp sleeve 20 by a bolt 48. Accordingly, the clamp cylinder 19 is fixed to the support stud 6 via the clamp sleeve 20.

  The clamp sleeve 20 has an annular sleeve 20a that extends in the axial direction from the mounting flange and faces the clamp cylinder 19, and the annular sleeve 20a is formed in a U-shaped cross section except for both end portions. It is thin and an annular pressure fluid chamber is formed between it and the clamp cylinder 19. A fluid path 28 from a pressure fluid supply device provided outside is communicated with the pressure fluid chamber. When a workpiece is processed, a pressure fluid, for example, high-pressure hydraulic oil is supplied through the fluid path 28. The thin portion of the annular sleeve 20a is reduced in diameter to press the clamp ring 21, and the clamp ring 21 and the clamp sleeve 20 are integrated. That is, the clamp ring 21 is fixed to the support stud 6. Accordingly, the support shaft 59 fastened to the clamp ring 21 via the plurality of bolts 33 and the main shaft 9 fastened to the support shaft 59 via the bolts 31 are configured by the support studs 5 and 6 and the frame 4. The spindle 10 is clamped so as not to rotate relative to the frame portion of the spindle head 50 to be rotated, and the spindle 10 is held in a turning position. The spindle 9 is turned by an external force during processing, that is, a reaction force applied from a workpiece via a tool. To prevent machining and maintain machining accuracy. Thus, the clamp ring 21 is provided as an annular member to be braked, the clamp sleeve 20 and the clamp cylinder 19 are provided as pressing members, and constitutes a clamp device 57 together with the fluid passage 28 and the pressure fluid supply device.

  The control device of the machine tool drives the support shaft motor 56 to rotate the rotor 13 so that a tool (not shown) mounted on the spindle 10 has a predetermined rotation angle with respect to the workpiece on the processing table, The drive-side fitting shaft 7 and the bearing holder 14, that is, the support shaft 58, which are fastened to the rotor 13 via a plurality of bolts 32, are rotated. The support shaft 58 is fastened to the main shaft 9 via a plurality of bolts 30, and rotates to rotate the main shaft 9, and the spindle 10 provided on the main shaft 9 rotates about the axis of the support shafts 58 and 59. .

  The rotary joint body 17 is fixed to the support stud 5 with bolts 45, the outer peripheral surface of the rotary joint body 17 faces the inner peripheral surface of the bearing holder 14, and the rotary joint body 17 and the bearing holder 14 A joint is formed. Via the rotary joint, a pressure fluid, a machining fluid, a cooling cleaning fluid, and the like for tool chucking are supplied from the outside to the spindle 10.

  When the spindle 50 is moved by the ram 1 and the support stud 5 or the support stud 6 collides with a processing jig or a workpiece, the spindle head 50 is placed between the frame 4 and the support stud 5 or between the frame 4 and the support stud 6. Relative movement occurs between the two. In such a collision accident recovery operation, as shown in FIGS. 2 and 6, the frame 4 and the support stud 5 are positioned in the spindle head 50, and the frame 4 and the support stud 6 are positioned as shown in FIGS. 4 is provided as a first mechanical component of the machine component of the present invention, and has four through-holes 4a, and the support stud 5 and the support stud 6 are each of the machine component of the present invention. It is provided as a second mechanical component and has two bottomed tapered holes 5a and 6a. Moreover, the taper pin 26 is used at the time of positioning as a taper pin of the mechanical component of the present invention, and is inserted across the taper hole 4a and the taper hole 5a and across the taper hole 4a and the taper hole 6a.

  In the restoration operation, the bolt 34 that fastens the head holder 3 and the frame 4 is removed, and the spindle head 50 is removed from the head motor 2. FIG. 6 is shown corresponding to FIG. 2, and shows an upper portion of the spindle head 50 in a state of being detached from the head motor 2.

  As shown on the left side in FIG. 6, the taper pin 26 is provided in the support stud 5 corresponding to the taper hole 4a of the frame 4 and the taper hole 4a. It is inserted across the taper hole 5a. A female screw 5b (nominal diameter of 8 mm in this embodiment) is provided at the bottom of the taper hole 5a, and a female screw 26a (nominal diameter larger than the female screw 5b as a through hole is provided at the axial center of the taper pin 26. In this embodiment, a nominal diameter of 10 mm) is provided. Using a bar-shaped wrench having a hexagonal cross section, a press-fitting bolt 46 (in the present embodiment, a nominal diameter of 8 mm) which is a hexagon socket head bolt is screwed into the female screw 5b through the female screw 26a of the taper pin 26. By this screwing operation, the head of the press-fitting bolt 46 presses the end face of the taper pin 26, the taper pin 26 is press-fitted into the taper hole 4a and the taper hole 5a by a screw force, and the frame 4 and the support stud 5 are relatively moved. It is accurately positioned in the state before it occurs. After the two taper pins 26 are press-fitted, the bolts 44 are attached, and the frame 4 and the support stud 5 are fastened. The positioning of the frame 4 and the support stud 6 is performed in the same manner. After the taper pin 26 is inserted across the taper hole 4a and the taper hole 6a provided in the support stud 6, the female provided at the bottom of the taper hole 6a. A press-fit bolt 46 is screwed into the screw 6b, and the taper pin 26 is press-fitted into the taper hole 4a and the taper hole 6a with a screw force. The taper pin 26 is provided short so that the taper pin 26 does not protrude from the frame 4, and the head holder 3 does not need to be provided with a space for the taper pin 26, that is, a spot facing.

  When the taper pin 26 is deformed or damaged due to the above-described collision accident between the support stud 5 or the support stud 6 and a processing jig or a workpiece, or when the spindle head 50 is disassembled and repaired, the support stud 5 or the support stud 6 is attached. When removing from the frame 4, the taper pin 26 is removed. After removing the press-fit bolt 46, as shown on the right side in FIG. 6, the removal bolt 47 is screwed into the female thread 26a of the taper pin 26, and the tip of the removal bolt 47 reaches the bottom of the tapered holes 5a, 6a. Further, the removal bolt 47 is screwed to press the bottoms of the tapered holes 5a and 6a. A force in the axial direction acts on the taper pin 26 as a reaction force against the bottom portion via the removal bolt 47. Therefore, the taper pin 26 moves in the axial direction and becomes removable as the press-fitted state is released by the screw force.

  Thus, the taper pin 26 remains attached to the taper holes 4 a, 5 a, 6 a and is removed as necessary. At that time, the press-fitted state is released by a screw force via the removal bolt 47. However, if the taper pin 26 remains attached, the taper pin 26 and the taper holes 4a, 5a, and 6a may be damaged by the above-described collision accident between the support stud 5 or the support stud 6 and the processing jig or workpiece. In particular, if the tapered holes 4a, 5a, 6a are damaged, the above-described positioning operation in the recovery operation of the collision accident becomes difficult. Further, since the taper pin 26 is mounted, the impact force applied to the spindle head 50, the ram 1, the driving device of the ram 1, and the head motor 2 is increased, and these are further damaged. Therefore, as shown in FIG. 2, in this embodiment, the taper pin 26 is removed after the frame 4 and the support stud 5 are fastened and after the frame 4 and the support stud 6 are fastened. 26 is removed after the press-fitted state is released by a screw force via a removal bolt 47. The spindle head 50 is operated in a state where the taper pin 26 is not mounted, and the taper holes 4a, 5a and 6a are prevented from being damaged in the case of the above-mentioned collision accident.

    In the present embodiment, the taper pin 26 is provided with only a female screw 26a as a through hole. However, a circular hole in which no thread is formed and the female screw 26a may be provided coaxially as the through hole. In that case, the circular hole is formed to have a diameter equal to or larger than the valley diameter of the female screw 26a, and the removal bolt 47 penetrates the circular hole of the taper pin 26 and the female screw 26a to the bottom of the tapered holes 5a and 6a. Reaching the bottom and allowing the bottom to be pressed. The circular hole and the female screw 26a are arranged such that a female screw 26a is provided on the front end side of the taper pin 26, a circular hole is provided on the rear end side, a circular hole is provided on the front end side, and a female screw 26a is provided on the rear end side. May be provided. Moreover, you may provide the circular hole or the internal thread 26a on both sides on both sides of the internal thread 26a or the circular hole.

  When the spindle 10 or the tool collides with a processing jig, a workpiece or the like due to a programming error or the like while the spindle 10 is turned by the support shaft motor 56, relative rotation between the main shaft 9 and the support shaft 58, that is, slip occurs. Positioning work with the drive-side fitting shaft 7 is required. Further, in order to move the tool to the machining position, the standby position, etc. while holding the turning position of the spindle 10 by operating the clamp device 57, the spindle head 50 is being moved by the ram 1 or the head motor 2 or the workpiece is moved. When the spindle 10 or the tool collides with a machining jig, a workpiece or the like due to a programming error or the like while moving the processing table mounted, relative rotation of the main shaft 9 and the support shaft 59, that is, slip occurs, and the main shaft 9 And positioning of the driven side fitting shaft 8 are required. In this embodiment, the taper pin 26 is positioned between the main shaft 9 and the drive side fitting shaft 7 in addition to the positioning of the frame 4 and the support stud 5 and the positioning of the frame 4 and the support stud 6. It is also used for positioning the main shaft 9 and the driven side fitting shaft 8.

  As shown in FIG. 5, the drive-side fitting shaft 7 is provided as a first mechanical component of the machine component of the present invention and has a tapered hole 7d, and the main shaft 9 is the first machine component of the present invention. 2 has a bottomed tapered hole 9g corresponding to the tapered hole 7d. A female screw 9h (in the present embodiment, a nominal diameter of 8 mm) is provided at the bottom of the tapered hole 9g. As shown in FIGS. 2 and 5, through holes for attaching and detaching the taper pins 26 are provided in the bearing holder 14 and the rotary joint body 17 corresponding to the taper holes 9g and 7d. At the time of positioning, the taper pin 26 is used as the taper pin of the machine component of the present invention, the taper pin 26 is inserted across the taper holes 7d and 9g, and the hexagon socket head bolt is connected to the female screw 26a of the taper pin 26 (in this embodiment). The taper pin 26 is press-fitted through the female screw 9h through a nominal diameter of 10 mm). After positioning, the main shaft 9 and the drive-side fitting shaft 7 are fastened by the bolt 30. The taper pin 26 may remain attached after the main shaft 9 and the drive-side fitting shaft 7 are fastened by the bolt 30. However, in this embodiment, after fastening with the bolt 30, the bolt is screwed into the female screw 26a of the taper pin 26, and the taper pin 26 is removed. Similar to the drive-side fitting shaft 7, the driven-side fitting shaft 8 is provided as a first machine component of the machine component of the present invention and has a tapered hole 8c, and the main shaft 9 is a machine component of the present invention. The second mechanical part is provided with a bottomed tapered hole 9g corresponding to the tapered hole tapered hole 8c. A female screw 9h is provided at the bottom of the tapered hole 9g. At the time of positioning, the taper pin 26 is used as the taper pin of the mechanical component of the present invention, the taper pin 26 is inserted across the taper holes 8c and 9g, and the hexagon socket head bolt penetrates the female screw 26a of the taper pin 26 and is female. The taper pin 26 is press-fitted by being screwed into the screw 9h. After positioning, the main shaft 9 and the driven side fitting shaft 8 are fastened by the bolt 31. After fastening with the bolt 31, the taper pin 26 is removed. In this embodiment, after the fastening, the taper pin 26 is removed in this way, and the spindle head 50 is operated without the taper pin 26 attached, so that the spindle 10 and the tool collide with a processing jig, a workpiece and the like. Even if an interference accident occurs, damage to the tapered holes 7d, 8c, and 9g can be avoided, and accurate positioning is possible in the restoration operation.

  In this embodiment, the machine component is applied to two machine parts that are applied to a spindle head 50 of a machine tool and are fastened and joined to each other via bolts. However, the mechanical component of the present invention may be applied to a machine other than the spindle head 50, and may be joined to each other by welding or adhesion after positioning, or press-fitting across the tapered hole of the positioning taper pin, that is, You may apply to two mechanical components etc. which are joined only by the press input based on the screw force of a press-fit bolt, and the fastening force of this press-fit bolt.

  The present invention is not limited to any of the above-described embodiments, and various modifications can be made without departing from the scope of the claims of the present invention.

1 is an overall view of a spindle head 50 of a machine tool including machine components of the present invention, and a part thereof is shown in a cross-sectional view. The right view of FIG. 1 is shown and the state which removed the cover 24 is shown. The left view of FIG. 1 is shown and the state which removed the cover 24 is shown. The top view seen from P viewing direction in FIG. 1 is shown. FIG. 2 is a partially enlarged view of FIG. 1. FIG. 2 shows a state in which the spindle head 50 is detached from the head motor 2, and shows a positioning operation between the frame 4 and the support stud 5 and a positioning release operation. The top view of the flame | frame 4 in the state by which the support stud 5 and the support stud 6 are arrange | positioned is shown.

Explanation of symbols

1 Ram 2 Head Motor 3 Head Holder 4 Frame 4a Tapered Hole 5 Support Stud 5a Tapered Hole 5b Female Screw 6 Support Stud 6a Tapered Hole 6b Female Screw 7 Drive Side Fitting Shaft 7a Fitting Shaft 7b Flat Surface 7c Sleeve 7d Tapered Hole 8 driven side fitting shaft 8a fitting shaft portion 8b flat surface 8c taper hole 9 main shaft 9a support shaft fitting hole 9b support shaft fitting hole 9c flat surface 9d flat surface 9e female screw 9f female screw 9g taper hole 9h female screw 10 Spindle 11 Stator holder 12 Stator 13 Rotor 14 Bearing holder 15 Bearing plate 16 Bearing 17 Rotary joint body 18 Motor plate 19 Clamp cylinder 20 Clamp sleeve 20a Annular sleeve 21 Clamp ring 22 Bearing holder 23 Bearing holder 24 Cover 26 Tapered pin 26a Female screw 28 Fluid path 29 Bearing plate 30 Bolt 31 Bolt 32 Bolt 34 Bolt 35 Bolt 36 Bolt 37 Bolt 38 Bolt 39 Bolt 41 Bolt 42 Bolt 44 Bolt 45 Bolt 46 Press-in bolt 47 Bolt 48 Bolt 49 Bolt 50 Spindle head 55 Spindle unit 56 Support shaft motor 57 Clamp device 58 Support shaft 59 Support shaft

Claims (1)

A first mechanical component having a taper hole therethrough, a second mechanical component having a bottomed tapered hole, and a positioning taper pin that is used to position the two mechanical components and is inserted across the tapered hole In machine components including
The taper pin has a through hole in its axial direction, and an internal thread extending in the axial direction is formed in at least a part of the through hole, and the bottom of the tapered hole of the second mechanical component has a smaller diameter than the internal thread. A machine component in which a female screw is formed.

Images