JP2004114297A - Honing machine equipped with oscillation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize vibration generated in spindle heads even if a high-speed oscillation is applied to spindles. <P>SOLUTION: In a honing machine, a first spindle 76a and a second spindle 76b, where grinding wheels are fit at each end and rotated, are relatively moved forward and backward and perform a honing for a work piece hole. The first spindle 76a is oscillated and the second spindle 76b is also oscillated but with 180-degree phase difference and in an opposite moving direction with respect to the first spindle 76a. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a honing machine for honing a machined hole of a workpiece by giving a feed while applying an axial oscillation to a rotationally driven grindstone.

In a honing machine that hones a machining hole in a machined part by giving an axial feed to a rotationally driven grindstone, high-accuracy and high-efficiency honing is performed by superimposing oscillation on the axial feed of a grinding wheel. One is described in Patent Document 1. The honing machine includes a spindle head mounted on a main body and reciprocally driven in a feed direction, a slidable and rotatable bearing in the feed direction supported by the spindle head, a grindstone held at a lower end, and a spring downward. A main shaft urged by the main shaft, a main shaft rotating motor for rotating the main shaft, and a relative rotation in the main shaft axial direction restricted to the main shaft and connected to the main shaft so as to be relatively rotatable; An extending arm is provided, and the distal end of the arm is periodically moved in the axial direction of the spindle by a vibrator attached to the outside of the spindle head.
JP-A-6-320412 (pages 5, 6; FIG. 4)

It has been found that the oscillation applied to the grindstone in honing processing has a significant effect on processing accuracy and processing efficiency. However, with conventional honing machines, increasing the speed of oscillation increases the vibration of the spindle head due to the inertia of the massive spindle, which adversely affects the mechanical parts of the machine and accelerates the deterioration of the machine. Or had an adverse effect on the processing accuracy. Recently, honing machines have tended to increase the spindle speed in order to extend the life of the grindstone, and it is necessary to increase the oscillation speed as the spindle speed increases. However, when the oscillation speed is increased, the vibration of the spindle head is increased, and there is a limit in increasing the speed of the oscillation.

The present invention has been made to solve such a conventional problem, and is intended to minimize the vibration generated in the spindle head even when the oscillation applied to the spindle is increased.

In order to solve the above-mentioned problems, a structural feature of the invention according to claim 1 is that a spindle head mounted on a main body and the spindle head are relatively moved toward a workpiece attached to the main body. A feed device for moving forward and backward, first and second spindles to which the spindle head is slidably and rotatably supported in the feed direction and to which a grindstone for honing a machining hole of the workpiece is attached at a tip thereof; In a honing machine having a spindle drive device for rotating and driving a first spindle and a second spindle, an oscillation is applied to the first spindle and the phase of the oscillation applied to the first spindle is shifted by 180 degrees with respect to the second spindle. An oscillation device for providing oscillations in which the movement directions are opposite to each other, thereby canceling vibration energy due to the oscillations applied to the first and second spindles. It is to honing without leaving.

A structural feature of the invention according to claim 2 is that a spindle head mounted on a main body, a feed device for relatively moving the spindle head toward and away from a workpiece mounted on the main body, and the spindle. First and second spindles, which are slidably and rotatably supported on the head in the feed direction, and have a tip mounted with a grindstone for honing a machining hole of the workpiece, and rotationally driving the first and second spindles A honing machine provided with a main spindle drive device, wherein a first cam mechanism that is rotated by a rotary drive device and acts on the first main shaft to impart axial oscillation to the first main shaft is supported on the main spindle head; A second cam mechanism that is connected to the first cam mechanism and acts on the second main shaft to give the second main shaft an oscillation that is 180 degrees out of phase with the oscillation of the first main shaft and has an opposite moving direction; It is that it was supported by the serial spindle head.

The structural feature of the invention according to claim 3 is that a spindle head mounted on a main body, a feed device for relatively moving the spindle head toward and away from a workpiece attached to the main body, and the spindle. First and second spindles, which are slidably and rotatably supported on the head in the feed direction, and have a tip mounted with a grindstone for honing a machining hole of the workpiece, and rotationally driving the first and second spindles A honing machine provided with a spindle drive device, wherein first and second link members are mounted on the spindle head so as to be swingable about a swing axis perpendicular to the spindle axis corresponding to each of the spindles. The main shaft and the link members are connected to each other so as to restrict relative movement in the main shaft axis direction, allow rotation of each main shaft and allow relative displacement in a direction perpendicular to the main shaft axis, and are parallel to the swing axis by a rotation drive device. Around the center of rotation A first cam mechanism, which is turned and acts on the first link member to impart axial oscillation to the first main shaft, is supported on the main spindle head, and is connected to the first cam mechanism and connected to the second link member. A second cam mechanism which acts on the second main shaft to provide an oscillation in which the phase is shifted by 180 degrees from the oscillation of the first main shaft and the movement direction is opposite to the second main shaft; That it was rotatable around.

A structural feature of the invention according to claim 4 is that a spindle head mounted on the main body, a feed device for relatively moving the spindle head toward and away from a workpiece attached to the main body, and the spindle. First and second spindles, which are slidably and rotatably supported on the head in the feed direction, and have a tip mounted with a grindstone for honing a machining hole of the workpiece, and rotationally driving the first and second spindles A honing machine provided with a main shaft drive device, wherein first and second cam mechanisms that act on the first and second main shafts to impart axial oscillation to the respective main shafts are supported on the main shaft head, The first and second cam mechanisms are connected to first and second servo motors, respectively, and the oscillation given to the first spindle by the first cam mechanism is given to the second spindle by the second cam mechanism. Osile Deployment and phase is that the moving direction 180 degrees rotated controlling said first and second servo motors so that the opposite.

According to a fifth aspect of the invention, there is provided a honing machine provided with the oscillation device according to any one of the second to fourth aspects, wherein the first and second cam mechanisms are mounted on the spindle head. A pair of rotation shafts which are supported on the rotation centers of the respective cam mechanisms, a support which is mounted on each rotation shaft so as to be movable in an eccentric direction perpendicular to the axis, and which is parallel to the respective rotation shafts. A roller rotatably supported about an eccentric shaft, a means for changing the amount of eccentricity between each of the rotating shafts and each of the eccentric shafts, and contacting a part of each of the main shafts or the link members with each of the rollers And a resilient member that urges each of the main shafts or each of the link members in the direction in which they are made to move.

   In the invention according to claim 1 configured as described above, the first and second spindles, each of which has a grindstone attached to the tip and is rotationally driven, are relatively moved forward and backward toward the workpiece, thereby forming a processing hole in the workpiece. In a honing machine that performs honing, an oscillation is applied to the first main spindle and an oscillation is applied to the second main spindle, the phase of which is 180 ° out of phase with the oscillation applied to the first main spindle, and the movement direction is opposite. Therefore, the vibration energies given by the oscillations applied to the first and second spindles cancel each other out, and even if the oscillations applied to the first and second spindles are performed at a high speed, the vibration generated in the spindle head is reduced to a small value. Accurate and highly efficient honing can be performed.

   In the invention according to claim 2 configured as described above, the first and second spindles, each of which is rotatably driven with a grindstone attached to the tip thereof, are relatively moved forward and backward toward the workpiece to form a processing hole in the workpiece. In a honing machine for honing, a first cam mechanism rotated by a rotary drive device applies axial oscillation to a first main shaft, and a second cam mechanism rotated by being connected to the first cam mechanism. Since the two spindles are given an oscillation whose phase is shifted by 180 degrees from the oscillation of the first spindle and whose movement direction is opposite to that of the first spindle, the first and second spindles have the same effects as those of the first aspect. Oscillation in which the directions of movement are opposite by 180 degrees out of phase with respect to the first and second main shafts without providing a special device, merely by reversing the operating directions of the first and second cam mechanisms that provide oscillation. It is possible to impart the emissions.

   In the invention according to claim 3 configured as described above, the first and second spindles, each of which is rotatably driven with a grindstone attached to the tip thereof, are relatively moved forward and backward toward the workpiece to form a processing hole in the workpiece. In a honing machine for honing, a first and a second link member are mounted on a spindle head so as to be swingable around a swing axis perpendicular to the spindle axis corresponding to each spindle, and each spindle and each link member are mounted. Are connected to each other while restricting relative movement in the main shaft axis direction and allowing rotation of each main shaft, and the first cam mechanism rotated by the rotation drive device acts on the first link member to move the first main shaft in the axial direction to the first main shaft. Oscillation is applied, and the second cam mechanism, which is rotated while being connected to the first cam mechanism, acts on the second link member, so that the second main shaft is 180 degrees out of phase with the oscillation of the first main shaft and the moving direction is changed. Give opposite oscillation Therefore, in addition to the effects of the invention described in claim 1, the rotation accuracy of the main shaft is maintained high without giving an excessive force or moment to the main shaft by a cam and a link mechanism that are reliably operated, and the first rotation is performed in a narrow space. In addition, oscillations whose movement directions are opposite to each other can be given to the second spindle.

   In the invention according to claim 4 configured as described above, the first and second spindles, each of which is rotatably driven with a grindstone attached to the tip thereof, are relatively moved forward and backward toward the workpiece to form a processing hole in the workpiece. In the honing machine for honing, the first and second cam mechanisms which act on the first and second main shafts to impart axial oscillation to the respective main shafts are rotationally driven by the first and second servo motors, respectively. The first and second oscillations are performed such that the oscillation applied to the first spindle by the first cam mechanism is 180 degrees out of phase with the oscillation applied to the second spindle by the second cam mechanism, and the movement directions are opposite. Since the rotation of the servomotor is controlled, in addition to the effects of the invention described in claim 1, the oscillations are 180 degrees out of phase with respect to the first and second spindles and have opposite movement directions with a simple mechanical structure. It is possible to grant.

   In the invention according to claim 5 configured as described above, the first and second spindles, each of which has a grindstone attached to the tip and is driven to rotate, relatively advance and retreat toward the workpiece so that a machining hole of the workpiece is formed. In a honing machine for honing, a support is mounted on a rotating shaft supported by a spindle head so as to be movable in an eccentric direction perpendicular to the axis, and a roller can be rotated around the eccentric shaft parallel to the rotating shaft. And a means for changing the amount of eccentricity between the rotating shaft and the eccentric shaft is provided to constitute a cam mechanism for applying oscillation to the first and second main shafts. The oscillation stroke can be optimally adjusted in accordance with the honing processing conditions.

   In a honing machine that hones a machined hole in a workpiece by giving a feed while giving an axial oscillation to a rotationally driven grindstone, the direction of movement is opposite to that of the oscillation applied to the main shaft by 180 degrees. By imparting the oscillation to the heavy object, the vibration energy due to the oscillation applied to the main shaft and the heavy object is mutually canceled, and even when the oscillation applied to the main shaft is performed at a high speed, the vibration generated in the main spindle head is reduced, Honing machines that enable high-accuracy, high-efficiency honing have been developed. First, such a honing machine will be described as a reference example, and then, an embodiment according to the present invention will be described by clarifying differences in configuration from the reference example.

   In the honing machine shown as a reference example in FIG. 1, a column 2 is erected on a bed 1 to constitute a main body 3. A workpiece W having a processing hole to be honed is mounted on the bed 1. A spindle head 4 is mounted on the column 2 so as to be slidable in the vertical direction (feed direction), and is reciprocated by a servomotor 6 via a ball screw / nut mechanism 5. A feed device 7 for moving the spindle head 4 toward and away from the workpiece W by the ball screw / nut mechanism 5 and the servomotor 6 is configured. As shown in FIG. 2, a spindle 10 to which a grindstone T for honing a machining hole of a workpiece W is attached at the tip thereof is slidably and rotatably supported in the feed direction. That is, a guide tube 11 is fixed to the spindle head 4, and the main shaft 10 is slidably supported at its lower end and upper portion by the stroke ball bearings 12 and 13 in the guide tube 11 so as to be rotatable.

   A description will be given of a spindle oscillation device 38 for applying oscillation in the axial direction to the spindle 10. As shown in FIG. 3, a link member 15 is pivotally attached to the spindle head 4 by a hinge pin 16 so as to be swingable around a swing axis perpendicular to the axis of the spindle 10, and the link member 15 and the spindle 10 are The main shaft 10 is connected in the vicinity of the main shaft 10 so that relative movement in the main shaft axis direction is restricted and relative rotation is possible and relative displacement in a direction perpendicular to the main shaft axis is possible. The link member 15 is provided with bearings 17 extending in the main shaft diametric direction on both upper sides of the main shaft 10, and a roller 18 is freely rotatable around each axis at a right angle to the main shaft axis and toward the center of the main shaft. Are respectively supported by support shafts 19. The two support portions 17 are connected by a connecting portion 20 on the side opposite to the hinge pin 16 with the main shaft 10 interposed therebetween, and a driven portion 21 which is provided with an oscillation from a central portion of the connecting portion 20 by contacting a roller of a cam mechanism described later. Extend in a direction perpendicular to the spindle axis and the hinge pin 16. A connecting member 25 is supported by a bearing 26 at a portion facing the bearing 17 of the main shaft 10 so as to regulate relative movement in the main shaft axis direction and to be relatively rotatable. An annular groove 27 is engraved on the outer periphery of the connecting member 25, and each roller 18 is engaged in the annular groove 27. As a result, the connecting member 25 is engaged with the support portion 17 of the link member 15 on both sides of the main shaft 10 such that the relative movement in the main shaft axis direction is restricted and the relative displacement is possible in a direction perpendicular to the main shaft axis. In FIG. 1, reference numeral 28 is perpendicular to the hinge pin 16, and is an axis toward the center of the spindle. The axis 28 is fixed to the spindle head 4 above the hinge pin 16. A roller 29 is rotatably supported on the shaft 28, and engages with a longitudinal groove provided in the connecting member 25 in the main shaft axis direction to prevent the connecting member 25 from rotating.

   A belt 33 is hung between a pulley 30 fixed to the main shaft 10 above the connecting member 25 and a pulley 32 fixed to an output shaft of a motor 31 fixed to the upper surface of the main shaft head 4 to rotate the main shaft 10. A main shaft driving device 34 for driving is configured. A compression spring 35 as a resilient member for urging the link member 15 in a direction in which the driven portion 21 which is a part of the link member 15 abuts against the roller 49 of the cam mechanism 40 is freely rotated by a ball bearing on the main shaft 10. It is interposed between a spring bearing 36 that is supported as possible and a spring bearing 37 mounted on the upper surface of the spindle head 4.

   Next, a spindle oscillation that is supported by the spindle head 4 and is driven to rotate about a rotation center parallel to the swing axis of the link member 15 and acts on the link member 15 to impart axial oscillation to the spindle 10. The cam mechanism 40 of the device 38 will be described. As shown in FIG. 4, a rotating shaft 41 is rotatably mounted on a side surface of the spindle head 4 so as to be rotatable around a rotating axis perpendicular to the spindle axis and parallel to the hinge pin 16. A pulley 42 is fixed to the rotating shaft 41 outside the spindle head 4, and a belt 45 is hung between the pulley 42 and a pulley 44 fixed to an output shaft of a servomotor 43 fixed to a side wall of the spindle head 4. Thus (see FIG. 3), a rotation driving device 46 for driving the rotation shaft 41 to rotate is configured.

   The rotary shaft 41 is provided with a flange 47 inside the box-shaped main spindle head 4, and a support 48 is mounted on the flange 47 so as to be movable in an eccentric direction perpendicular to the axis of the rotary shaft 41. A roller 49 is supported by the support 48 so as to be rotatable about an eccentric shaft 53 parallel to the axis of the rotating shaft 41 and eccentric by an eccentric amount e. The driven portion 21 of the link member 15 abuts on the roller 49. I have. An adjusting shaft 50 is rotatably supported on the rotating shaft 41, and the rotation of the adjusting shaft 50 is converted into an eccentric movement of the support member 48 to change the amount of eccentricity e between the rotating shaft 41 and the eccentric shaft 53. There is provided means 51 for performing the operation. That is, the operation shaft 52 is supported in the rotation shaft 41 such that the rotation thereof is restricted and is relatively movable in the axial direction. The operation shaft 52 is moved in the eccentric direction by the axial movement of the operation shaft 52. A wedge 55 is provided at an end of the support member 48 so as to contact an inclined surface 54 provided in an inner hole 61 of the support 48. The support 48 is urged by a compression spring 56 in a direction to press the inclined surface 54 against the wedge 55. As an axial movement device 57 for moving the operation shaft 52 relative to the rotation shaft 41 in the axial direction, a male screw 59 screwed with a female screw 58 provided on the adjustment shaft 50 is engraved at the rear end of the operation shaft 52. I have. At the rear end of the adjusting shaft 50, a knob 60 for rotating the adjusting shaft 50 is mounted outside the main spindle head 4 as an operating part of the shaft moving device 57.

   A heavy object 66 having a weight equal to the weight of the main shaft 10 is mounted on the main shaft head 4 so as to be movable in the main shaft axis direction. A heavy-weight oscillation device 65 that causes the cam mechanism 40 to act on the heavy weight 66 at a position where a certain oscillation is applied will be described. As shown in FIGS. 2 and 5, above the guide cylinder 11 fixed to the spindle head 4, an arm member 67 swings around a swing axis parallel to the swing axis of the link member 15 at the center thereof. It is pivotably mounted and extends substantially horizontally below the link member 15. The arm member 67 is provided with bifurcated pivot portions 68 extending in the diametrical direction of the guide tube 11 on both upper sides of the guide tube 11, and each pivot portion 68 is provided on both sides of the guide tube 11 with a link member 15. Are rotatably supported by a pair of pivots 69 fixed in parallel with the swing axis of the shaft. An abutting end 70 of the arm member 67 for connecting the pivoting portion 68 abuts against the roller 49 of the cam mechanism 40 from below, and the end of the pivoting portion 68 has a weight equivalent to the weight of the main shaft 10. 66 are attached. The arm member 67 is urged clockwise by the spring force of the compression spring 71 interposed between the bottom surface of the spindle head 4 and the lower surface of the arm member 67 below the roller 49, and the contact end 70 is moved to the roller 49. It is pressed from below. It is desirable that the weight of the heavy object 66 is equal to the weight of the main shaft 10. However, even if the weights of the two are considerably different, the vibration of the main head 4 can be reduced.

   In the reference example configured as described above, when the workpiece W is attached to the bed 1 and the start button is pressed, the main shaft 10 is rotated by the motor 31 at the command speed via the pulleys 32 and 30 and the belt 33. The rotating shaft 41 of the cam mechanism 40 of the spindle oscillation device 38 is rotated at a command speed by a servomotor 43 via pulleys 44 and 42 and a belt 45. Due to the rotation of the rotation shaft 41, the roller 49 eccentrically supported from the rotation center revolves around the rotation shaft 41, and periodically pushes the driven portion 21 which is a part of the link member 15 contacting the roller 49 upward. To swing the link member 15. As a result, the rollers 18 supported by the two support portions 17 of the link member 15 periodically push the side walls of the annular groove 27 of the connecting member 25 in the vertical direction, and the main shaft 10 supported by the connecting member 25 by the bearing 26. Is given an oscillation.

   In the heavy load oscillation device 65, the contact end 70 of the arm member 67 is in contact with the roller 49 by the spring force of the compression spring 71, so that the arm member 67 swings periodically due to the revolution of the roller 49. As a result, oscillation is given to the weight 66. When the roller 49 moves upward due to the revolution, the driven portion 21 is pushed upward and the link member 67 is rotated clockwise about the hinge pin 16, so that the link between the roller 49 and the hinge pin 16 is formed. The main shaft 10 connected to the member 67 is moved upward. As the roller 49 is raised, the contact end 70 is also raised by the spring force of the compression spring 71, and the arm member 67 is rotated clockwise about the pivot 69, so that the arm member 67 is located on the opposite side of the roller 49 with respect to the pivot 69. The heavy object 66 attached to the end of the pivot portion 68 of the arm member 67 is moved downward. As described above, the oscillation device 72 constituted by the main shaft oscillation device 38 and the heavy load oscillation device 65 has a 180 ° phase shift with respect to the main shaft 10 and the heavy load 66 based on the rotation of the rotary shaft 41, and the movement direction is opposite. The oscillation of each is given. Since the vibration energies of the two oscillations whose phases are shifted by 180 degrees cancel each other, the vibration generated in the spindle head 4 becomes very small.

   Since the rotating torque is transmitted to the main shaft 10 via the pulleys 32 and 30 and the belt 33, the torque transmission to the main shaft 10 becomes a resistance to the oscillation of the main shaft 10 in the axial direction due to the flexibility of the belt 33. The main shaft 10 is smoothly rotated while being smoothly given oscillation. Since each roller 18 is only in contact with the annular groove 27 of the connecting member 25 so as to be relatively displaceable in a direction perpendicular to the axis of the main shaft 10, the roller 18 is in a direction perpendicular to the connecting member 25 and the main shaft 10. Does not give the power of. In particular, the swing of the link member 15 causes the roller 18 and the annular groove 27 to move slightly relative to each other in the diameter direction of the main shaft 10 perpendicular to the hinge pin 16, but the roller 18 is free to rotate around the support shaft 19 parallel to the hinge pin 16. Since it is rotatable, no force is applied to the connecting member 25 and the main shaft 10 in a direction perpendicular to the main shaft axis in joining with the annular groove 27, and the main shaft 10 can maintain high rotational accuracy. Since the main shaft 10 is urged downward by the compression spring 35 via the spring receiver 36, the upper side wall of the annular groove 27 is pressed by the roller 18 so that the link member 15 rotates counterclockwise in FIG. When driven, the driven portion 21 is constantly pressed by the roller 49.

   In this state, the spindle head 4 is moved downward via the ball screw / nut mechanism 5 by the rotation of the servomotor 6, and the grindstone T mounted on the spindle 10 is inserted into the machining hole of the workpiece W to clean the inner peripheral surface of the machining hole. Honing process. Oscillation of amplitude and speed suitable for machining is given to the spindle 10, and the vibration generated in the spindle head 4 is minute as described above, so that the machining hole is honed with high precision and high efficiency by the grindstone T. You.

   When the amplitude of the oscillation is changed, when the knob 60 of the cam mechanism 40 is rotated, the operating shaft 52 is advanced and retracted in the axial direction by the screw mechanisms 58 and 59 in accordance with the rotation direction of the knob 60, and is supported by the wedge mechanisms 54 and 55. The body 48 is moved in the left-right direction in FIG. When the operating shaft 52 is moved forward, the support 48 moves rightward, the eccentricity e of the roller 49 elongates and the amplitude increases, and when it is retracted, the support 48 moves leftward and the amplitude decreases. The oscillation frequency can be set by controlling the rotation speed of the servo motor 43 to a desired value.

   Hereinafter, in the honing machine having the first and second spindles, the oscillation direction is shifted by 180 degrees from the oscillation imparted to the first spindle while the oscillation is imparted to the first spindle, and the movement direction is opposite. A first embodiment of a honing machine provided with an oscillation device for applying an oscillation will be described. As shown in FIG. 6, the first embodiment has first and second main axes, and the first main axis is provided with oscillation and the second main axis is provided with oscillation and phase given to the first main axis. The first spindle assembly 76a is the same as the reference example except that an oscillation device that gives an oscillation that is 180 degrees shifted and the movement direction is opposite is provided. In the second spindle assembly 76b, the same reference numerals are attached with lowercase letters b, and detailed description is omitted. In the spindle head 75, first and second spindle assemblies 76a and 76b including the spindle 10, the guide cylinder 11, and the spindle oscillation device 38 in the reference example are arranged in parallel. In the first embodiment, the cam mechanism 40 of the main shaft oscillation device 38 does not have the means 51 for changing the eccentricity e between the rotating shaft 41 and the eccentric shaft 53, and the flange 47 of the rotating shaft 41 is described. A roller 49 is supported by the support 48 so as to be rotatable around an eccentric shaft 77 parallel to the rotation axis of the rotation shaft 41 and eccentric by an eccentric amount e. The eccentric shafts 77a and 77b of the first and second main shaft assemblies 76a and 76b are flexible couplings such that the eccentric directions of the eccentric shafts 77a and 77b with respect to the rotating shafts 41a and 41b are out of phase by 180 degrees. They are connected by a connection shaft 79 via 78a and 77b. The main shafts 10a and 10b are rotated by a pulley belt between a pulley fixed to each rear end and a pulley 32 fixed to an output shaft of the motor 31. In the first embodiment as well, means 51 for changing the amount of eccentricity e between the rotating shaft 41 and the eccentric shaft 53 shown in FIG. 4 may be incorporated in the rotating shafts 41a and 41b to vary the amplitude of oscillation. Further, as the first and second cam mechanisms 40a and 40b, cam members having elliptical outer circumferences are attached to the rotating shafts 41a and 41b which are supported on the spindle head 75, with the phase in the rotation direction shifted by 90 degrees, and the rotation of the cam members is performed. The centers may be connected by a connection shaft 79.

   The operation of the first embodiment will be described. The rotating shaft 41a of the cam mechanism 40a of the first spindle assembly 76a is rotated at a command speed by the servomotor 43a via pulleys 44a and 42a and a belt 45a. Due to the rotation of the rotation shaft 41a, the roller 49a eccentrically supported from the rotation center revolves around the rotation shaft 41a, and periodically pushes the driven portion 21a which is a part of the link member 15a abutting on the roller 49a. To swing the link member 15a. As a result, the roller 18a supported by the support portion 17a of the link member 15a periodically pushes the side wall of the annular groove 27a of the connecting member 25a in the vertical direction, and the first main shaft is supported by the connecting member 25a by the bearing 26a. An oscillation is given to 10a.

The eccentric shaft 77b of the cam mechanism 40b of the second spindle assembly 76b is rotationally driven via the connecting shaft 79 with a phase difference of 180 degrees from the eccentric shaft 77a. As a result, the roller 49b revolves around the rotation shaft 41b with a phase shift of 180 degrees from the roller 49a, and rises when the roller 49a descends to raise the driven part 21b, which is a part of the link member 15b, which comes into contact with the roller 49b. To swing the link member 15b so that the second spindle 10b connected to the link member 15b is 180 degrees out of phase with the oscillation applied to the first spindle 10a, and the movement direction is opposite. Is given.

で は In the second embodiment shown in FIG. 7, only the cam mechanism is different from the first embodiment, and therefore, the cam mechanism will be described. A rotary shaft 80 is rotatably mounted on the main spindle head 75 so as to be rotatable in parallel with the swing axis of the link members 15a and 15b. At both ends of the rotary shaft 80, the phase in the eccentric direction with respect to the axis of the rotary shaft 80 is shifted by 180 degrees. Eccentric shafts 81a and 81b are formed, and rollers 49a and 49b are rotatably supported by the eccentric shafts 81a and 81b. The rotating shaft 80 is driven to rotate by a servomotor 82 via a pulley and a pulley belt. As a result, the rollers 49a and 49b revolve around the rotation axis 80 with the phase shifted by 180 degrees, and the movement directions are shifted by 180 degrees to the first and second main shafts 10a and 10b via the link members 15a and 15b. Give the opposite oscillation.

In the second embodiment, the revolutions of the rollers 49a and 49b of the cam mechanisms 40a and 40b are transmitted to the main shafts 10a and 10b via the link members 15a and 15b, whereas the third embodiment shown in FIG. In the embodiment, rollers 49a and 49b supported on eccentric shafts 81a and 81b formed at both ends of a rotating shaft 80 with eccentric directions shifted by 180 degrees are rotatably supported on first and second main shafts 10a and 10b. The coupling members 25a, 25b are directly engaged with the annular grooves 27a, 27b, and the cam mechanisms 40a, 40b directly apply oscillation to the main shafts 10a, 10b.

In the first embodiment, the eccentric shafts 77a and 77b supporting the rollers 49a and 49b of the first and second cam mechanisms 40a and 40b are connected by a connecting shaft 79, but in the fourth embodiment shown in FIG. The rotary shafts 41a, 41b of the first and second cam mechanisms 40a, 40b are connected to synchronous rotary servomotors 85a, 85b via toothed pulleys 82a, 82b, 83a, 83 and toothed timing belts 84a, 84b. The phase of the oscillation applied to the first main shaft 10a by the first cam mechanism 40a is shifted by 180 degrees from that of the oscillation applied to the second main shaft 10b by the second cam mechanism 40b, and the movement direction is reversed. The first and second servo motors 80a and 80b are controlled to perform synchronous rotation.

It is a side view which shows the whole honing machine of a reference example. It is a side sectional view of the spindle head part of the honing machine of a reference example. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. 4. It is a figure showing a 1st embodiment. It is a figure showing a 2nd embodiment. It is a figure showing a 3rd embodiment. It is a figure showing a 4th embodiment.

Explanation of reference numerals

3 ... Main body, 4,75 ... Spindle head, 7 ... Sending device, 10 ... Spindle, 15 ... Link member, 16 ... Hinge pin (swing axis), 17 ... Support part, 18 roller, 21 driven part (part of link member), 25 coupling member, 34 spindle drive unit, 35 compression spring (elastic member) 38, a spindle oscillation device, 40, a cam mechanism, 41, 80, a rotating shaft, 43, 82, a servomotor, 46, a rotary drive device, 48, a support, 49: roller, 53, 77a, 77b, 81a, 81b: eccentric shaft, 65: heavy-weight oscillation device, 66: heavy-weight, 67: arm member, 69: pivot , 72 ... oscillation device, 79 ... connecting shaft, 85a, 85b ... Period rotation servo motor, W · · · workpiece, T · · · grindstone.

Claims (5)

A spindle head mounted on the main body, a feed device for relatively moving the spindle head toward and away from the workpiece attached to the main body, and a slidable and rotatable rotary shaft for the spindle head in the feed direction. A honing machine having first and second spindles, which are mounted on the tip thereof, and to which a grindstone for honing a machining hole of the workpiece is attached at the tip, and a spindle drive device that rotationally drives the first and second spindles. An oscillation device is provided for giving an oscillation to one main shaft and giving an oscillation to the second main shaft, the phase of which is shifted by 180 degrees from that of the oscillation given to the first main shaft, and the movement direction is opposite to the first main shaft. An oscillation device is provided, which performs honing processing while canceling out vibration energy due to oscillation applied to the second spindle. It was honing machine. A spindle head mounted on the main body, a feed device for relatively moving the spindle head toward and away from the workpiece attached to the main body, and a slidable and rotatable rotary shaft for the spindle head in the feed direction. A honing machine provided with first and second spindles to which a grindstone for honing a machining hole of the workpiece is mounted at the tip and a spindle drive device for rotationally driving the first and second spindles; A first cam mechanism, which is rotated by a device and acts on the first main shaft to impart axial oscillation to the first main shaft, is supported on the main spindle head, and is connected to the first cam mechanism and connected to the second main shaft. A second cam mechanism is provided on the spindle head, the second cam mechanism acting to provide the second spindle with an oscillation having a phase shifted by 180 degrees from the oscillation of the first spindle and having the opposite movement direction. Honing machine equipped with the oscillation apparatus. A spindle head mounted on the main body, a feed device for relatively moving the spindle head toward and away from the workpiece attached to the main body, and a slidable and rotatable rotary shaft for the spindle head in the feed direction. A honing machine provided with first and second spindles which are mounted on the tip thereof and are provided with a grindstone for honing a machining hole of the workpiece at a tip thereof, and a spindle drive device for rotating and driving the first and second spindles. First and second link members are mounted on the head so as to be swingable about a swing axis perpendicular to the spindle axis corresponding to the respective spindles, and the respective spindles and the link members are moved relative to each other in the spindle axis direction. The first link member is connected to each other so as to restrict movement and allow rotation of each spindle and to be relatively displaceable in a direction perpendicular to the axis of the spindle, and is rotated around a rotation center parallel to the swing axis by a rotation drive device; Before acting on A first cam mechanism for imparting axial oscillation to a first main shaft is supported on the main spindle head, and is connected to the first cam mechanism and acts on the second link member to apply the first main shaft to the second main shaft. A second cam mechanism for providing an oscillation having a phase shifted by 180 degrees and an opposite movement direction to the above-mentioned oscillation is rotatably supported on the spindle head around a rotation center parallel to the swing axis. Honing machine with an oscillation device. A spindle head mounted on the main body, a feed device for relatively moving the spindle head toward and away from the workpiece attached to the main body, and a slidable and rotatable rotary shaft for the spindle head in the feed direction. A honing machine having first and second spindles, which are mounted on the tip thereof, and to which a grindstone for honing a machining hole of the workpiece is attached at the tip, and a spindle drive device that rotationally drives the first and second spindles. First and second cam mechanisms, which act on the first and second spindles to impart axial oscillation to the respective spindles, are supported by the spindle head, and the first and second cam mechanisms are coupled to the first and second cam mechanisms. The servo motors are respectively connected to each other, and the oscillation direction given to the first spindle by the first cam mechanism is shifted by 180 degrees from the oscillation direction given to the second spindle by the second cam mechanism. Honing machine equipped with the oscillation device, characterized in that the rotation control the first and second servo motors so that the opposite. A honing machine provided with the oscillation device according to any one of claims 2 to 4, wherein the first and second cam mechanisms are mounted on the spindle head on a rotation center of each of the cam mechanisms. A rotating shaft, a support mounted on each rotating shaft so as to be movable in an eccentric direction perpendicular to the axis, and a roller rotatably supported on each of the supporting members around an eccentric axis parallel to the rotating shaft, Means for changing the amount of eccentricity between each of the rotating shafts and each of the eccentric shafts; A honing machine equipped with an oscillation mechanism, characterized by comprising an energizing member.

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