JP5302268B2 - Super finishing equipment - Google Patents

Description

  The present invention relates to a superfinishing apparatus.

  In the superfinishing device, a left and right pair of left and right support portions are provided on a support frame, and a drive shaft and a balance shaft are horizontally arranged on the left and right support portions so that they are parallel to each other and have left and right axes. A cam member is supported between the drive shaft and the balance shaft so that it can be moved left and right along the center. The cam member is rotationally driven around the front and rear axes, and is fixed to the drive shaft. A drive shaft interlocking member that is externally fitted and held so as to be relatively movable, and a balance shaft interlocking member that is fixedly attached to the balance shaft and is externally held so as to be relatively movable in the axial center (left and right) direction of the drive shaft. A left spring that biases one of the two shaft interlocking members toward the cam member, and a left spring facing the other of the shaft interlocking members toward the cam member. And a grindstone holder that holds the superfinishing grindstone so that it presses toward the tip side is mounted on the left end or right end of the drive shaft, and the cam members are eccentric in opposite directions. A first eccentric cam and a second eccentric cam, the drive shaft interlocking member side is in contact with the first eccentric cam and the balance shaft interlocking member side is in contact with the second eccentric cam; There is one in which the driving shaft and the balance shaft are reciprocated in opposite directions in the left-right direction so that the grindstone holder is reciprocated in the left-right direction at high speed while removing secondary vibration (Patent Document 1).

JP 2002-11650 A

  In this type of conventional superfinishing equipment, for example, when the outer peripheral surface of the input / output shaft of the torque converter is superfinished, the input / output shaft of the torque converter is used as a workpiece, and it is arranged in the vertical direction. It is convenient to support the workpiece by rotating around the shaft center and reciprocating the grindstone holder in the vertical direction while pressing the superfinishing grindstone against the outer peripheral surface of the workpiece.

In such a case, simply rotate the conventional superfinishing device just 90 degrees around the front and rear axis, and arrange the drive shaft and balance shaft so that they can move up and down along the vertical axis. Then, it is conceivable to reciprocate the grindstone holder up and down.
However, if it does in this way, since the weight of a grindstone holder and the weight of a drive shaft interlocking member will be added to the weight of a drive shaft, the weight balance of the drive shaft side and the balance shaft side will worsen. In addition, the left spring and the right spring are arranged vertically (upper and lower springs). As a result, the weight of the drive shaft, the weight of the grindstone holder, and the weight of the drive shaft interlocking member are lower than the lower spring. The weight of the balance shaft and the balance shaft interlocking member is applied in the direction of extending the upper spring with respect to the upper spring, the balance of the upper and lower springs also deteriorates, and the grindstone holder is moved up and down smoothly at high speed. There was a problem that it could not be reciprocated.

  In view of the above problems, an object of the present invention is to provide a superfinishing apparatus capable of reciprocating a grindstone holder in a vertical direction at high speed.

The technical means of the present invention for solving this technical problem is that an upper support portion and a lower support portion are provided on a support frame, and a drive shaft and a balance shaft are parallel to each other and are vertically connected to the upper and lower support portions. A cam member that is supported so as to be movable along the center and is driven to rotate about a horizontal axis passing between both shafts is provided between the drive shaft and the balance shaft. A drive shaft interlocking member that is externally fitted and held so as to be relatively movable in the center direction, and a balance shaft interlocking member that is fixed to the balance shaft and is externally held so as to be relatively movable in the axial direction of the drive shaft. And a lower spring that urges one of the shaft interlocking members upward toward the cam member, and the other of the shaft interlocking members as a cam member. And an upper spring that adjusts the urging force of the lower spring to the lower support portion, and an upper spring adjustment that adjusts the urging force of the upper spring to the upper support portion. A mechanism is provided, and a grindstone holder that holds the superfinishing grindstone to be pressed toward the tip side is attached to the end of the drive shaft,
The cam member has a first eccentric cam and a second eccentric cam eccentric in opposite directions, the drive shaft interlocking member side is in contact with the first eccentric cam, and the balance shaft interlocking member side is in contact with the second eccentric cam. It is a super-finishing device that is adapted to reciprocate the grindstone holder in the vertical direction by rotating the cam member,
The drive shaft is hollow and the balance shaft is solid so that the sum of the weight of the drive shaft and the grindstone holder and the weight of the balance shaft are uniform, and the push shaft to the first eccentric cam is pushed. The biasing force of the lower spring is set larger than the biasing force of the upper spring so that the pressure and the pressing force of the balance shaft interlocking member to the second eccentric cam are equal.

  Further, according to another technical means of the present invention, the cam member can be varied from a low speed rotation to a high speed rotation, and the drive shaft interlocking member side keeps contact with the first eccentric cam when the cam member rotates. At the same time, the urging force of the upper spring and the urging force of the lower spring can be adjusted in the maximum high-speed rotation state of the cam member so that the balance shaft interlocking member side is kept in contact with the second eccentric cam. It is in.

Another technical means of the present invention is that a motor is attached to a support frame, and the cam member is fitted and fixed to an output shaft of the motor.
In another technical means of the present invention, pressurized fluid is sealed between the drive shaft and the upper and lower support portions and the balance shaft interlocking member, and between the balance shaft and the upper and lower support portions and the drive shaft interlocking member. In other words, fluid bearings each having an axial center in the vertical direction are provided.

  According to the present invention, since the drive shaft is hollow and the balance shaft is solid, the drive shaft and the balance shaft are supported movably along the vertical axis. The weight of the drive shaft and the grinding wheel holder and the weight of the balance shaft are made uniform, the weight balance between the drive shaft side and the ballast shaft side is improved, and the drive shaft and the balance shaft are connected by the rotation of the cam member. The grindstone holder can be reciprocated in the vertical direction at high speed while reciprocating in the opposite directions in the vertical direction and effectively removing secondary vibrations.

  In addition, since the drive shaft and the balance shaft are arranged vertically and driven up and down, the weight of the drive shaft, the weight of the grindstone holder, and the weight of the drive shaft interlocking member reduce the lower spring with respect to the lower spring. The weight of the balance shaft and the balance shaft interlocking member is applied in the direction of extending the upper spring with respect to the upper spring, but the pressing force of the drive shaft interlocking member on the first eccentric cam and the balance shaft interlocking member first 2 Since the biasing force of the lower spring is set larger than the biasing force of the upper spring so that the pressing force to the eccentric cam is equal, the balance of the upper and lower springs is also improved. Can be reciprocated up and down smoothly at high speed.

It is front sectional drawing of the superfinishing apparatus which shows one Embodiment of this invention. It is a plane sectional view of the super finishing device. It is a side view of the superfinishing apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3, the support frame 2 of the superfinishing apparatus 1 is formed in a U shape when viewed from the side, and is provided with an upper support portion 3 and a lower support portion 4. The drive shaft 7 and the balance shaft 8 are supported by the vertical support portions 3 and 4 so as to be movable in parallel with each other and along the vertical axis.

  The drive shaft 7 and the balance shaft 8 are spaced apart from each other in the left-right direction and are arranged in parallel in the vertical direction. The upper part of the drive shaft 7 and the upper part of the balance shaft 8 are supported by the upper support part 3 through the air bearings 10 and 11 so as to be movable up and down. The lower part of the drive shaft 7 and the lower part of the balance shaft 8 are lower support parts. 4 are supported by air bearings 12 and 13 so as to be movable up and down.

A cam member 15 is provided between the drive shaft 7 and the balance shaft 8 so as to be rotationally driven around a horizontal axis in the front-rear direction passing between the shafts 7 and 8. A drive shaft interlocking member 17 and a balance shaft interlocking member 18 are provided with the cam member 15 interposed therebetween.
The drive shaft interlocking member 17 is disposed on the lower side of the drive shaft 7 and the balance shaft 8, and the left and right end sides of the drive shaft interlocking member 17 are externally fitted and fixed to the lower middle part of the drive shaft 7. The other ends of the left and right sides are fitted on the lower middle part of the balance shaft 8 via an air bearing 19 so as to be relatively movable up and down. As a result, the drive shaft interlocking member 17 is fixed to the drive shaft 7 and is externally fitted and held on the balance shaft 8 so as to be relatively movable in the axial direction. The drive shaft 7 moves up and down together with the drive shaft interlocking member 17. ing.

  The balance shaft interlocking member 18 is disposed on the upper side of the drive shaft 7 and the balance shaft 8, and the left and right end sides of the balance shaft interlocking member 18 are relatively movable up and down via an air bearing 20 in the middle part on the upper side of the drive shaft 7. The balance shaft interlocking member 18 is fitted and fixed to the upper halfway portion of the balance shaft 8 at the other left and right ends of the balance shaft interlocking member 18. As a result, the balance shaft interlocking member 18 is fixed to the balance shaft 8 and is externally held on the drive shaft 7 so as to be relatively movable in the axial direction, and the balance shaft 8 moves up and down together with the balance shaft interlocking member 18. ing.

Thus, pressurized air is sealed between the drive shaft 7 and the upper and lower support portions 3 and 4 and the balance shaft interlocking member 18 and between the balance shaft 8 and the upper and lower support portions 3 and 4 and the drive shaft interlocking member 17. In addition, air bearings 10, 11, 12, 13, 19, and 20 are provided with the axial centers oriented in the vertical direction.
A lower spring 23 is provided below the drive shaft interlocking member 17, and an upper spring 24 is provided above the balance shaft interlocking member 18. The lower spring 23 biases the drive shaft interlocking member 17 upward toward the cam member 15, and the upper spring 24 biases the balance shaft interlocking member 18 downward toward the cam member 15.

A lower spring adjustment mechanism 25 that adjusts the urging force of the lower spring 23 is provided on the lower support portion 4, and an upper spring adjustment mechanism 26 that adjusts the urging force of the upper spring 24 is provided on the upper support portion 3.
The lower spring adjustment mechanism 25 has a lower screw shaft 29 that is screwed to the lower support portion 4 so as to be movable up and down, and the lower screw shaft 29 is moved relative to the lower support portion 4 by rotating the lower screw shaft 29. The urging force of the lower spring 23 can be adjusted by moving up and down.

The upper spring adjusting mechanism 26 has an upper screw shaft 30 screwed to the upper support portion 3 so as to be movable up and down, and the upper screw shaft 30 is rotated with respect to the upper support portion 3 by rotating the upper screw shaft 30. Thus, the urging force of the upper spring 24 can be adjusted by moving up and down.
A motor 33 is attached to the center portion of the support frame 2 via an attachment bracket 32. The cam member 15 is externally fitted and fixed to the protruding end side of the output shaft 34 of the motor 33. The rear side of the output shaft 34 of the motor 33 is supported on the case of the motor 33 by a bearing 27 so as to be rotatable around the rotation axis a, and the front side of the output shaft 34 of the motor 33 is provided with a support cylinder portion 35 of the mounting bracket 32. The support frame 2 is supported by the bearing 36 so as to be rotatable around the rotation axis a.

  The cam member 15 has a first eccentric cam 37 and a second eccentric cam 38 that are eccentric in opposite directions (deviation of 180 ° in the circumferential direction). The first eccentric cam 37 and the second eccentric cam 38 are in positions shifted from each other in the front-rear direction, and the first eccentric cam 37 is located on the front side of the second eccentric cam 38, and the first eccentric cam 37 and the second eccentric cam Reference numeral 38 has shaft centers b and c at positions eccentric to the rotation axis a of the output shaft 34 of the motor 33 in opposite directions. A first bearing 39 is fitted on the first eccentric cam 37 and a second bearing 40 is fitted on the second eccentric cam 38.

  The drive shaft interlocking member 17 is brought into contact with the first bearing 39 of the first eccentric cam 37 through the lower contact member 41, and the balance shaft interlocking member 18 is in contact with the first eccentric cam 38 through the upper contact member 42. 2 is in contact with the bearing 40, and the drive shaft interlocking member 17 and the drive shaft 7, and the balance shaft interlocking member 18 and the balance shaft 8 are reciprocally moved in the opposite directions in the vertical direction by the rotational drive of the motor 33. It has become.

The contact surfaces of the lower contact member 41 and the upper contact member 42 are coated with boron, thereby reducing frictional resistance and improving wear resistance.
A grindstone holder 43 is attached to the lower end of the drive shaft 7. At the tip of the grindstone holder 43, the superfinishing grindstone 44 is held in an outward projecting shape, and cylinder means for pressing the superfinishing grindstone 44 toward the tip side with fluid pressure (air pressure in the embodiment) is incorporated. ing. Therefore, the cam member 15 is rotated by driving the motor 33 to reciprocate the grindstone holder 43 to the superfinishing grindstone 44 in the vertical direction.

  The workpiece W to be superfinished by pressing the superfinishing grindstone 44 is used as, for example, an input / output shaft of a torque converter. The workpiece W is arranged in the vertical direction and is driven to rotate about the vertical axis. While the workpiece W is driven to rotate about the vertical axis, the grinding wheel holder 43 is reciprocated in the vertical direction, and the superfinishing grindstone 44 is pressed against the outer peripheral surface of the workpiece W to perform superfinishing. .

The superfinishing apparatus 1 is attached to a moving mechanism (not shown) that moves the superfinishing apparatus 1 in the X direction (for example, the front-rear direction) and the Y direction (for example, the left-right direction) by the mounting bracket 32.
The drive shaft 7 is hollow and the balance shaft 8 is solid, and a balance weight 45 is fixed to the upper end portion of the balance shaft 8, thereby adding the drive shaft 7 and the grindstone holder 43 to the weight. The balance shaft 8 and the balance weight 45 are made uniform in weight.

  The motor 33 can change the cam member 15 from a low speed rotation to a high speed rotation by the motor 33, and at the same time the drive shaft interlocking member 17 side is in contact with the first eccentric cam 37 when the cam member 15 rotates, the balance shaft interlocks. The biasing force of the upper spring 24 and the biasing force of the lower spring 23 can be adjusted while the cam member 15 is in the maximum high-speed rotation state so that the member 18 side is kept in contact with the second eccentric cam 38.

  For example, if the width of the reciprocating motion (oscillation) in the vertical direction of the grindstone holder 43 to the superfinishing grindstone 44 is 1.5 mm, the maximum high-speed rotation of the cam member 15 is 2000 rpm / min, and the reciprocating motion (oscillation). If the width of the cam member 15 is 0.5 mm, the maximum high-speed rotation of the cam member 15 is set to 4000 rpm / min, and the biasing force and lower force of the upper spring 24 in the maximum high-speed rotation state of the cam member 15 at 2000 rpm / min or 4000 rpm / min. The urging force of the spring 23 is adjusted by the lower spring adjustment mechanism 25 and the upper spring adjustment mechanism 26. By adjusting the biasing force of the upper spring 24 and the biasing force of the lower spring 23, the weights of the drive shaft 7, the drive shaft interlocking member 17, the balance shaft 8, the balance shaft interlocking member 18, the balance weight 45, and the grindstone holder 43 are In consideration of the urging force to the upper spring 24 and the urging force to the lower spring 23, the pressing force of the drive shaft interlocking member 17 to the first eccentric cam 37 and the second eccentric cam 38 of the balance shaft interlocking member 18. The driving shaft interlocking member 17 side is kept in contact with the first eccentric cam 37 even when the cam member 15 is rotated at the maximum high speed, and at the same time the balance shaft interlocking member 18 side is second. The urging force of the lower spring 23 is set larger than the urging force of the upper spring 24 so as to maintain the contact state with the eccentric cam 38.

A protective cover 47 covers the front surfaces of the drive shaft 7, the balance shaft 8, the drive shaft interlocking member 17, the balance shaft interlocking member 18, and the like. Reference numeral 48 denotes a piping block for supplying compressed air to the air bearings 10, 11, 12, 13 and the like.
According to the above embodiment, when superfinishing the workpiece W, the superfinishing apparatus 1 is moved in the X-axis direction and the Y-axis direction, and the superfinishing grindstone 44 of the grindstone holder 43 is pushed toward the workpiece W in the axial direction. The workpiece W may be superfinished by rotating the grindstone holder 43 up and down by rotating the motor 33 while rotating the workpiece W about the vertical axis.

  In the above embodiment, since the drive shaft 7 is hollow and the balance shaft 8 is solid, and the balance weight 45 is fixed to the upper end portion of the balance shaft 8, the drive shaft 7 and the balance shaft 8 are vertically moved. Despite being arranged in the direction, the weight added to the drive shaft 7 and the grindstone holder 43 and the weight of the balance shaft 8 are made uniform, and the weight balance between the drive shaft 7 side and the ballast shaft side is improved. The rotation of the cam member 15 causes the drive shaft 7 and the balance shaft 8 to reciprocate in the vertical direction opposite to each other, effectively reciprocating the grindstone holder 43 in the vertical direction while effectively removing secondary vibrations. be able to.

  Further, since the drive shaft 7 and the balance shaft 8 are arranged in the vertical direction and driven up and down, the weight of the drive shaft 7, the weight of the grindstone holder 43 and the weight of the drive shaft interlocking member 17 are relative to the lower spring 23. The lower spring 23 is applied in the direction of contraction, and the weight of the balance shaft 8 and the balance shaft interlocking member 18 is applied in the direction of extending the upper spring 24 with respect to the upper spring 24, but the first eccentricity of the drive shaft interlocking member 17. The biasing force of the lower spring 23 is set larger than the biasing force of the upper spring 24 so that the pressing force to the cam 37 and the pressing force to the second eccentric cam 38 of the balance shaft interlocking member 18 are equal. Therefore, the balance of the upper and lower springs 23 is improved, and also from this point, the grindstone holder 43 can be reciprocated in the vertical direction smoothly at high speed.

  Further, the cam member 15 can be varied from a low speed rotation to a high speed rotation, and the urging force of the upper spring 24 and the urging force of the lower spring 23 can be adjusted in the maximum high speed rotation state of the cam member 15. By adjusting the urging force of the upper spring 24 and the urging force of the lower spring 23 in the maximum high-speed rotation state of the cam member 15, the drive shaft 7, the drive shaft 7, the balance shaft 8, the balance shaft interlocking member 18, the balance weight 45, and Considering the influence of the total weight of the grindstone holder 43 on the biasing force on the upper spring 24 and the biasing force on the lower spring 23, the pressing force of the drive shaft interlocking member 17 on the first eccentric cam 37 and the balance shaft interlocking The pressing force of the member 18 to the second eccentric cam 38 becomes equal, and even when the cam member 15 is in the maximum high-speed rotation state, the drive shaft interlocking member 17 side is on the first eccentric cam 3 side. The urging force of the lower spring 23 is larger than the urging force of the upper spring 24 so that the balance shaft interlocking member 18 side is kept in contact with the second eccentric cam 38 at the same time. It can be set easily.

Further, since the motor 33 is attached to the support frame 2 and the cam member 15 is externally fixed to the output shaft 34 of the motor 33, the cam member 15 is directly driven to rotate by the rotation of the output shaft 34 of the motor 33. Therefore, the cam member 15 can be rotated with a simple configuration with high accuracy, and the entire superfinishing apparatus 1 can be made compact.
Further, between the drive shaft 7 and the upper support portion 3, the lower support portion 4 and the balance shaft interlocking member 18, and between the balance shaft 8 and the upper support portion 3, the lower support portion 4 and the drive shaft interlocking member 17, Since the air bearings 10, 11, 12, 13, 19, and 20 are provided so that the pressurized air is sealed and the axis is directed in the vertical direction, the air bearings 10, 11, 12, 13, and 20 that are directed in the vertical direction are provided. Since the weight of the drive shaft 7 or the balance shaft 8 acts in the vertical direction with respect to 19, 20, the drive shaft 7 or the balance shaft 8 has an axial center of the air bearing 10, 11, 12, 13, 19, 20. The axis is less likely to shift.

  That is, when the air bearing is oriented horizontally and the drive shaft and balance shaft are oriented horizontally as in the past, the weight of the drive shaft or balance shaft relative to the air bearing is the axial direction of the air bearing. Therefore, the axis of the drive shaft or balance shaft is likely to be displaced with respect to the axis of the air bearing, so that the accuracy of the reciprocating movement of the drive shaft is deteriorated and the machining accuracy of the superfinishing is also deteriorated. However, in the case of the above embodiment, the axis of the drive shaft 7 or the balance shaft 8 is less displaced with respect to the axis of the air bearings 10, 11, 12, 13, 19, and 20. The accuracy of reciprocation can be increased, and super-finishing can be performed with higher accuracy.

In the above embodiment, the balance weight 45 is fixed to the upper end portion of the balance shaft 8. However, the balance weight 45 is omitted by increasing or decreasing the diameter of the solid balance shaft 8. May be.
In the above-described embodiment, the air bearings 10, 11, 12, 13, 19, and 20 are provided. Instead, oil and other pressurized fluids are enclosed, and the axis is directed vertically. An existing fluid bearing may be provided.

DESCRIPTION OF SYMBOLS 1 Super finishing device 2 Support frame 3 Upper support part 4 Lower support part 7 Drive shaft 8 Balance shaft 10 Air bearing 11 Air bearing 12 Air bearing 13 Air bearing 15 Cam member 17 Drive shaft interlocking member 18 Balance shaft interlocking member 19 Air bearing 20 Air bearing 23 Lower spring 24 Upper spring 25 Lower spring adjustment mechanism 26 Upper spring adjustment mechanism 33 Motor 34 Output shaft 37 First eccentric cam 38 Second eccentric cam 43 Wheel holder 44 Superfinishing wheel

Claims (4)

The support frame (2) is provided with an upper support portion (3) and a lower support portion (4), and the drive shaft (7) and the balance shaft (8) are parallel to each other on the upper and lower support portions (3, 4). A cam that is supported so as to be movable along the vertical axis and is driven to rotate about a horizontal axis passing between the shafts (7, 8) between the drive shaft (7) and the balance shaft (8). A drive shaft interlocking member (17) provided with a member (15), fixed to the drive shaft (7) and externally held by the balance shaft (8) so as to be relatively movable in the axial direction thereof, and a balance shaft (8 And a balance shaft interlocking member (18) fixedly attached to the drive shaft (7) so as to be relatively movable in the axial direction of the drive shaft (7). Shaft interlocking member (17,1 ) And a lower spring (23) for urging upward toward the cam member (15) and an upper portion for urging the other of the shaft interlocking members (17, 18) downward toward the cam member (15). A lower spring adjustment mechanism (25) for adjusting the urging force of the lower spring (23) is provided on the lower support portion (4), and an upper spring (24) is provided on the upper support portion (3). ) Is provided with an upper spring adjustment mechanism (26), and a grindstone holder (43) that holds the superfinishing grindstone (44) so as to press it toward the distal end is an end of the drive shaft (7). It is attached to
The cam member (15) has a first eccentric cam (37) and a second eccentric cam (38) eccentric in opposite directions, and the drive shaft interlocking member (17) side is in contact with the first eccentric cam (37). Superfinishing is made such that the balance shaft interlocking member (18) side is brought into contact with the second eccentric cam (38) and the grindstone holder (43) is reciprocated in the vertical direction by rotation of the cam member (15). A device,
The drive shaft (7) is hollow and the balance shaft (8) is solid so as to equalize the weight of the drive shaft (7) and the grindstone holder (43) and the weight of the balance shaft (8). The pressing force of the drive shaft interlocking member (17) to the first eccentric cam (37) is equal to the pressing force of the balance shaft interlocking member (18) to the second eccentric cam (38). The superfinishing apparatus, wherein the biasing force of the lower spring (23) is set larger than the biasing force of the upper spring (24).   The cam member (15) is variable from a low speed rotation to a high speed rotation, and the drive shaft interlocking member (17) side keeps contact with the first eccentric cam (37) when the cam member (15) rotates. At the same time, the urging force of the upper spring (24) and the lower spring with the cam member (15) rotating at the maximum high speed so that the balance shaft interlocking member (18) side is kept in contact with the second eccentric cam (38). The super finishing device according to claim 1, wherein the urging force of (23) is adjustable.   The motor (33) is attached to the support frame (2), and the cam member (15) is externally fixed to the output shaft (34) of the motor (33). Super finishing equipment.   Between the drive shaft (7) and the upper and lower support portions (3, 4) and the balance shaft interlocking member (18) and between the balance shaft (8), the upper and lower support portions (3, 4) and the drive shaft interlocking member (17). 4. Fluid bearings (10, 11, 12, 13, 19, 20), each of which is provided with a pressurized fluid and whose axis is directed vertically, are provided. The super finishing apparatus according to any one of the above.

Images