JPH10138137A - Dresser for grinding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibration or the like of an arm so as to realize appropriate dressing. SOLUTION: A dresser for a grinding machine is provided with a dressing wheel 11 at the tip of an arm 10 provided in the state of being turnable around a supporting shaft 9 between a stand-by position and a dressing position, and an arm holding means 12 for holding the arm 10 more on the tip side than the supporting shaft 9 in the state of the arm 10 being turned into the dressing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dresser for a grinding machine, and more particularly to a dresser for a grinding machine suitable for a compound grinding machine.

[0002]

2. Description of the Related Art Conventionally, a dresser for a grinding machine has a structure in which a dressing grindstone is provided at the tip of a revolving arm. The arm is provided so as to be pivotable about a support shaft, and is usually at a standby position where the arm is turned upward, and is turned to a lower dress position when dressing.

[0003]

However, in the dresser for a grinding machine, the distance from the spindle, which is the center of rotation of the arm, to the dressing grindstone is long. In particular, when applied to a compound grinding machine, the arm needs to be longer to avoid interference with each grinding wheel. For this reason, when the rigidity of the arm is reduced and a load is applied to the arm during dressing, vibration and the like occur, and there is a problem that an appropriate dress cannot be formed.

[0004] Therefore, an object of the present invention is to provide a dresser for a grinding machine capable of realizing an appropriate dress while suppressing vibration of the arm and the like.

[0005]

In order to achieve the above object, according to the present invention, a dressing grindstone is provided at the tip of an arm provided to be pivotable about a spindle between a standby position and a dressing position. In a dresser for a grinding machine, arm holding means for holding a tip end side of a support shaft of the arm in a state where the arm is swung to a dress position is provided.

Thus, when the dress is started with the dressing whetstone, the force acting on the arm is held not only by the support shaft but also by the arm holding means. That is, the length of the arm itself is substantially shortened, the rigidity is increased, and the vibration of the arm is suppressed.

The arm holding means may hold the arm from both sides of the turning surface, and at least one of the arm holding means may be constituted by a holding portion comprising a cam follower. According to this, an arm can be easily held without requiring a driving source for holding.

The arm holding means may hold the arm from both sides of the turning surface, and at least one of the arm holding means may be constituted by a holding portion comprising a cylinder.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of a composite grinding machine having a grinding machine dresser according to the present embodiment. The composite grinding machine generally includes a work holding table 2 provided on a base 1, a dresser table 3, an inner diameter grinding table 4, and an outer diameter / end face grinding table 5.

The work holding table 2 and the dresser table 3 are arranged on a moving table 7 driven by a servo motor 6 and reciprocating in the YY 'direction on the base 1.

The work holding table 2 is configured to rotate a work W mounted on the tip of a rotating shaft 2a by driving a motor 2b.

As shown in FIG. 2, the dresser base 3 includes a support portion 8, an arm 10 provided on the support portion 8 so as to be pivotable about a support shaft 9, and a dressing portion provided at the tip of the arm 10. It comprises a grindstone 11 and a holding portion 12 that holds the arm 10 at a position more distal than the support shaft 9, that is, an intermediate portion between the support shaft 9 and the dressing grindstone 11.

The arm 10 pivots about the support shaft 9 between a dress position shown in FIGS. 1 to 3 and a standby position rising upward from the dress position. The arm 10 has a stopper 13 on the lower surface on the distal end side in a state where the arm 10 is swung to the dress position (see FIG. 3A).
Is provided.

As shown in FIG. 3A, the holding portion 12 comprises a substantially U-shaped holding base 14 and cam followers 15 provided on both arms 14a of the holding base 14, respectively.
When the arm 10 pivots to the dress position, the stopper 13 contacts the intermediate portion of the holding table 14 so that the arm 10
A stopper receiving portion 16 for positioning in the turning direction is provided. Further, the cam follower 15 is shown in FIG.
As shown in (1), the center of the cam 15a is provided at a position eccentric from the axis of the shaft portion 15b. A bearing 15c is provided on the outer periphery of the cam 15a so as not to hinder the operation of the arm 10 between the two arms 14a. Also,
A screw 15d is formed at the other end of the shaft 15b, and the shaft 15b is connected to the arm 14a by a lock nut 15c.
It is fixed to. The cam 15a adjusts the rotational position as follows in order to hold the arm 10 that pivots to the dress position without any gap. First, the cam 15a is rotated so that the center of the cam 15a is positioned away from the arm 10. Next, the arm 10 is turned to the dress position, and the stopper 13 is brought into contact with the stopper receiving portion 16. In this state, the cam 15a is rotated in the direction in which the center approaches the arm 10, the bearing 15c is brought into contact with the arm 10, and then the lock nut 15e at the other end of the shaft 15b is tightened, thereby connecting the shaft 15b to the arm. 14a. This adjustment is
It may be performed once when the holding unit 12 is assembled.

The inner diameter grinding table 4 is driven by a servomotor 17 and is provided on the base 1 so as to be able to reciprocate in the XX 'direction. The inner diameter grinding table 4 has a spindle head 18 with a built-in motor. At the tip of the spindle head 18, an inner diameter grinding wheel 19 is mounted.

The outer diameter / end face grinding table 5 is provided with a servo motor 22.
And a movable table 21 that is reciprocally movable in the YY ′ direction on the base 1 and a servo motor 2 on the movable table 21.
0, and a movable table 23 which is reciprocally movable in the XX 'direction. A motor 24 and a spindle head 25 that is rotated by a drive of the motor 24 via a belt 24 a are mounted and fixed on the movable table 23. The tip of the spindle head 25 has an outer diameter
An end surface grinding wheel 26 is fixed. On the outer peripheral surface of the outer diameter / end surface grinding wheel 26, an end surface grinding surface 26a and an outer peripheral surface grinding surface 26b are formed so as to be orthogonal to each other.

In the composite grinding machine having the above-described configuration, when grinding the inner peripheral surface of the work W, the inner peripheral surface of the work W is rotated while the inner peripheral surface of the work W is rotated. The inner diameter grinding table 4 is reciprocated in the XX 'direction by the driving of the servomotor 17 while the outer peripheral surfaces of the inner and outer surfaces are slid. When grinding the end surface of the work W, the grinding surface 26a for the end surface of the outer diameter / end surface grinding wheel 26 is slid on the end surface of the work W while the work W and the outer diameter / end surface grinding wheel 26 are rotated. While being in contact with each other, the movable table 21 is reciprocated in the YY ′ direction by driving the servo motor 22. In the grinding, the arms 10 of the dresser base 3 are turned upward about the support shaft 9 so as not to interfere with each other.

If the outer diameter / end face grinding wheel 26 or the inner diameter grinding wheel 19 decreases in sharpness due to clogging or the like,
The arm 10 of the dresser base 3 is turned horizontally about the support shaft 9. Then, the stopper 13 of the arm 10
Is brought into contact with the stopper receiving portion 16 of the holding portion 12 and
The outer peripheral surface of the cam follower 15 holds both side surfaces of the arm 10. As a result, the arm 10 is held by the stopper receiving portion 16 of the holding portion 12 and the two cam followers 15 in the intermediate portion between the support shaft 9 and the dressing grindstone 11, and the bending rigidity is increased. That is, in the arm 10 in this state,
The point of action is the dressing grindstone 11 as in the prior art, but the fulcrum moves from the support shaft 9 to the holding part 12 close to the point of action. Therefore, even if a force acts on the arm 10 via the dressing grindstone 11 by starting the dressing of each grinding grindstone 19 or 26 with the dressing grindstone 11, this arm 10 bends or As a result, it is possible to perform a good dress with less vibration.

In the above embodiment, the dresser table 3
Although the cam follower 15 is used for the holding portion 12 of the above, a cylinder 27 shown in FIG. 4 may be used. Various types such as a hydraulic type and a pneumatic type can be applied to the cylinder 27.

[0021]

As is clear from the above description, according to the dresser for a grinding machine of the present invention, the arm holding member for holding the distal end side of the arm is provided at the time of dressing, so that the rigidity of the arm is reduced. Heightened, suitable dress is possible.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a grinding machine provided with a dresser according to the present invention.

FIG. 2 is a plan view showing the dresser of FIG. 1;

FIG. 3 is a view (a) of FIG. 2 and a sectional view (b) of a cam follower.

4 is an arrow view showing a state in which a cylinder is applied instead of the cam follower in FIG. 3;

[Explanation of symbols]

 Reference Signs 9 Support shaft 10 Arm 11 Dressing stone 12 Holding part (arm holding means)

Claims (3)

[Claims] 1. A dresser for a grinding machine comprising a dressing grindstone provided at a tip of an arm rotatably provided about a spindle between a standby position and a dressing position, wherein the arm is turned to the dressing position. A dresser for a grinding machine, characterized in that an arm holding means for holding a tip end side of a support shaft of the arm in a state is provided. 2. The dresser for a grinding machine according to claim 1, wherein said arm holding means holds the arm from both sides of the turning surface, and at least one of the arm holding means is constituted by a holding portion comprising a cam follower. 3. The dresser for a grinding machine according to claim 1, wherein the arm holding means holds the arm from both sides of the turning surface, and at least one of the arm holding means is constituted by a holding portion formed of a cylinder.