JPH0724202Y2 - Work locator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work locator for a grinding machine.

2. Description of the Related Art Conventionally, a work locator that detects the end face position of a multi-step workpiece in the longitudinal direction and outputs a sizing signal has been provided on a bed or table, so when changing the setup every time the workpiece changes, the work rest, There was direct interference with the automatic sizing device, etc., and it lacked versatility, and the feeler saving mechanism was large and expensive. In order to deal with these problems, a work locator is provided on the grinding wheel base.
-There is technology of No.78564.

Problems that the Invention is to Solve In the work locator provided on the grindstone, which is described in the related art, the length from the turning center of the locator arm to the feeler and the mounting angle are fixed, so as shown in FIG. To
Grinding stone 10 when locating the small diameter part of the workpiece W
There is a large difference between the center distance A between the workpiece 1 and the workpiece W and the center distance B when the large diameter portion is locating, which inevitably increases the front-rear movement distance of the wheel head and increases the structure of the grinder. It had a problem that it had to be done. In order to solve this problem, if you try to expand and contract the length of the feeler of the cotter that is diagonally fixed to the whetstone, it will expand and contract on a straight line when measuring a small workpiece diameter. At the time of measurement, the tip of the feeler acts below the center of the workpiece, which causes a problem that the workpiece and the feeler interfere with each other. In addition, since the orientation of the feeler is constant, there is a problem that a wide range from large diameter to small diameter cannot be measured.

Further, all of the conventional techniques described above have a problem that they are dedicated to a cylindrical grinder and cannot be applied to a grinder capable of simultaneously grinding a cylinder and a shoulder.

The present invention has been made in view of the above problems of the conventional technique, and the purpose thereof is to improve the front-back movement distance of the grinding wheel base by devising the shape of the locator arm and the way of providing the feeler. It is intended to provide a work locator capable of performing a wide range of locating without increasing the number thereof, and further adapting the locator base even when switching between the cylindrical grinding and the cylindrical and shoulder simultaneous grinding.

Means for Solving the Problems In order to achieve the above object, a work locator according to the present invention is a predetermined one on an under table of a grindstone in an angle head or an angle slide grinder capable of cylindrical grinding or simultaneous grinding of a cylinder and a shoulder. A locator base fixed on a grindstone base mounted so as to be capable of angular rotation so as to be horizontally rotatable, a rotary shaft rotatably supported on the locator base in parallel with a grindstone shaft at the time of cylindrical grinding, and the locator mount provided on the locator base. A swivel means for driving the swivel shaft, and a locator arm which is formed in an arc shape as a whole except for a mounting portion mounted in a direction perpendicular to the swivel shaft,
A detector having a feeler slidably attached to a guide provided along the arc portion of the locator arm, wherein the shape of the arc portion allows the feeler to move when the detector moves along the guide. It is formed so that the tip is oriented in the tangential direction of the arc so that it moves almost on the horizontal line of the center of the workpiece, and the feeler is moved and adjusted according to the diameter of the workpiece while the grinding head is fixed at a fixed location. The arm length is set.

Action The feeler is moved along the arc-shaped guide of the locator arm according to the workpiece diameter, and the position of the feeler is fixed so that the measured position of the wheel head back-and-forth movement is an appropriate distance from the grinding position.

In addition, during cylindrical grinding, the feeler should be orthogonal to the grindstone axis and the workpiece.When simultaneously grinding the cylinder and the shoulder, tilt the grindstone to a specified angle and turn the locator stand to turn the grindstone in the opposite direction. Is fixed in a state of being orthogonal to the workpiece.

Example An example will be described with reference to FIGS. 1 to 4. A grindstone base 1 is mounted on a grindstone lower base (not shown) of a known plane and angle head or angle slide grinder so as to be rotatable at a predetermined angle. A grindstone shaft 2 is rotatably supported on the grindstone base 1, and the grindstone at the tip is replaced with a flat grindstone 3A for cylindrical grinding and an angle grindstone 3B for simultaneous cylinder and shoulder grinding. On the upper surface of the whetstone stand 1, there is a swivel pin 4
A locator base 5 is supported so as to be horizontally rotatable around the center of the wheel, and a plurality of T-bolts fitted into two T-grooves 6 of an arc centered on the rotary pin 4 engraved on the grindstone base 1. The locator base 5 is fixed by. A swivel shaft 7 is supported on the locator base parallel to the grindstone shaft 2 during cylindrical grinding, one end of which is connected to a rotary shaft of a rotary actuator 8 fixed to the locator base 5 by a joint, and the other end of which is connected to the rotary shaft. A locator arm 9 is attached in a right angle direction. The locator arm 9 is formed in an arc shape as a whole except for the attachment portion, and a single-sided guide 9a as shown in the sectional view of FIG. 3 is integrally provided on the side surface of the arc portion. A detector 11 is attached to the guide 9a via a mount 10 so that the position of the detector 11 can be changed. A detector 12 is fixed to the detector 11 so as to abut on a step or a flange in the longitudinal direction of the workpiece W. Further, an L-shaped positioning fitting 13 is fixed to the locator base 5, and a stopper bolt 14 is screwed onto the tip of the fitting 13. The locator arm 9 rotated by the rotary actuator 8 has a retracted position determined by a stopper bolt 14 and a measurement position determined by a stopper (not shown) incorporated in the actuator. When the locator arm 9 is swung to the retracted position, the dog 15 fixed to the swivel axis contacts the limit switch LS2 and a confirmation signal is output, and when swung to the measurement position, the dog 15 is moved to the limit switch LS1. Upon contact, a confirmation signal is output. Further, a stopper 17 for positioning the locator base 5 when the grindstone base 1 is in the cylindrical grinding position and a stopper 17 for positioning the locator base 5 when the grinding head 1 is in the cylindrical and shoulder simultaneous grinding position.
18 is provided on the grindstone base 1, and the locator arm 9 and the feeler 12 are adjusted so as to be correctly orthogonal to the workpiece at the measuring position.

Next, the operation of this embodiment will be described.

The state shown in FIGS. 1 and 2 shows the position of the work locator during cylindrical grinding, and the locator base 5 is in contact with the stopper 17. Further, the detector 11 is moved along the arc-shaped guide 9a of the locator arm 9. With this movement, the feeler faces in the tangential direction of the arc, and the swing displacement of the feeler tip is enlarged. The feeler length is adjusted so that the measurement position is appropriate for the grinding position corresponding to the workpiece diameter so that the position of the tip of the feeler abuts the workpiece substantially on the horizontal line of the height of the workpiece. After the workpiece W is supported by the centers of the headstock and tailstock (not shown) and the grindstone 1 is stopped at the forward measurement position, the table (not shown) is moved in the axial direction of the workpiece to move the stage of the workpiece W. 12 on the part or flange
Abut. At the time of contact, a signal is output from the detector 11 to position the workpiece. The rotary actuator 8 is actuated, and the locator arm 9
Turn 12 downward and retract. Cylindrical grinding is performed by cutting the grindstone base 1 forward.

If the next workpiece W is another workpiece that simultaneously grinds the flange end surface and the outer diameter, the flat grindstone 3A is replaced with the angle grindstone 3B, and the grindstone base 1 is pivoted and positioned at a predetermined angle in the clockwise direction. , The posture that allows simultaneous grinding of the cylindrical portion and the shoulder portion. Also, loosen the T-bolt on the whetstone stand, and manually turn the locator stand 5 counterclockwise about the swivel pin 4 at the same angle as the grindstone stand 1 and bring it into contact with the stopper 18 to tighten the T-bolt and tighten the locator stand. To fix. Then, the rotary actuator is driven to rotate the locator arm 9 so that the feeler 12 is orthogonal to the workpiece, and the position of the feeler from the center of rotation is adjusted to the measurement position. Similarly, the workpiece is axially positioned, the filler is retracted, and the cylindrical portion and shoulder portion are ground simultaneously.

Effect of the Invention Since the present invention is configured as described above, it has the following effects. By moving the feeler along the arc-shaped guide of the locator arm, the feeler changes its direction to the tangential direction of the arc, so the swing displacement of the tip of the feeler can be increased, and the feeler can be expanded or contracted to raise the height of the workpiece. Since the position of the tip of the feeler is kept close to the horizontal line, it is possible to effectively expand the measurement range without moving the grindstone base excessively and without interfering with the workpiece and the feeler. Also, by adjusting the position of the tip of the feeler to the optimum arm length that is almost on the horizontal line of the work center height according to the workpiece diameter, it is not necessary to retract the grinding head by the extra length of the arm. The amount of movement in the front-back direction from the measurement position to the grinding position can be set to a minimum, and the processing cycle time can be shortened. In addition, when switching between cylindrical grinding and cylindrical shoulder simultaneous grinding, it is only necessary to extend and retract the locator arm and pivotally position the locator base, and it is not necessary to replace the work locator. The setup change time can be shortened. Further, since the work locator is provided on the grindstone stand, tooling on the table becomes easy.

[Brief description of drawings]

FIG. 1 is a side view of the work locator of this embodiment, showing a case of cylindrical grinding, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a sectional view taken along line CC of FIG. FIG. 4 is a state diagram during simultaneous grinding of a cylinder and a shoulder, and FIG. 5 is an explanatory diagram showing changes in the measurement position and the moving distance of the wheel head when a fixed-arm-length locator is used for explaining the prior art. . 1 …… Whetstone stand, 9 …… Locator arm 12 …… Feeler

Claims (1)

[Scope of utility model registration request] 1. An angle head or an angle slide grinder capable of grinding a cylinder or a cylinder and a shoulder at the same time, and is fixed so as to be horizontally rotatable on a grindstone stand mounted so as to be swung by a predetermined angle on a grindstone lower table. Mounted locator base, a rotary shaft supported by the locator base parallel to the grindstone shaft during cylindrical grinding, a rotary means provided on the locator base for driving the rotary shaft, and mounted in a direction perpendicular to the rotary shaft. And a detector having a feeder slidably attached to a guide provided along the arc portion of the locator arm. The shape of the circular arc portion is formed so that the feeler faces the tangential direction of the circular arc when the detector moves along the guide, and the position of the tip moves almost along the horizontal line of the center of the workpiece. Work locator and setting the arm length by moving and adjusting the feeler according to workpiece diameter while fixing the fixed place.