JPH05212658A - Work grinding device by three-dimensional grinding machine with vertical computer numerical control device - Google Patents

Abstract

PURPOSE:To provide a working device capable of grinding a noncylindrical work by means of a three-dimensional grinding machine with a computer NC device. CONSTITUTION:This is a work grinding device by a three-dimensional grinding machine with a vertical computer NC device made up of installing a control mechanism 12, which controls a turning angle of a turntable 5 and an amount of travel in the longitudinal direction of a carriage 3 by means of a program preset according to the grinding of a work W, in this three-dimensional grinding machine A with the said NC system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work grinding apparatus using a three-dimensional grinding machine with a vertical computer NC unit.

[0002]

2. Description of the Related Art In a conventional three-dimensional grinding machine with a vertical computer NC device, a work is placed on a table and a program preset according to the grinding surface of a grinding wheel is used. The amount of movement of the table in the front-rear direction and the amount of movement of the grinding wheel in the left-right and up-down directions are applied to the table's front-rear feed mechanism, the grindstone's left-right feed mechanism, and the up-down lift mechanism to prevent workpieces from moving. Although grinding is performed on a predetermined surface of a cylindrical shape, the present invention places a work on a rotary table provided on a carriage, rotates a grinding wheel, and rotates it by a preset program according to the grinding surface of the work. The amount of movement in the front-back direction of the carriage and the amount of movement in the vertical direction of the whetstone calculated from the rotation angle of the table are applied to the feed mechanism of the whetstone and the lifting mechanism of the whetstone to make the workpiece a predetermined non-cylindrical surface. Work by a three-dimensional grinder with a vertical computer NC device that can be ground and can also be processed into a cylindrical shape with a grinding wheel while rotating the work like a conventional vertical grinder. It is a technical subject to provide a grinding apparatus.

[0003]

The gist of the present invention will be described with reference to the accompanying drawings.

The machine base 1 is provided with a carriage 3 which is moved back and forth by a feed mechanism 2, and a rotary table 5 which is horizontally rotatable about a main shaft 4 is rotatably provided on the carriage 3 so as to be rotatable. A vertical computer NC device equipped with an elevating device 8 for vertically moving a whetstone base 7 erected on columns 6 standing on the left and right rear sides of the whetstone, and a grinding mechanism 9 for grinding a workpiece W on the whetstone base 7 is vertically installed. In the original grinding machine A, a work holding plate 10 is attached to the rotary table 5, and the work W is clamped by the work holding plate 10 to grind the work W by the grinding wheel 11 of the grinding mechanism 9. The control mechanism 12 for controlling the rotation angle of the rotary table 5 and the amount of movement of the carriage 3 in the front-rear direction is controlled by a preset program according to the surface to be ground.
The present invention relates to a work grinding apparatus using a three-dimensional grinding machine with a vertical computer NC device, characterized in that the grinding surface of the work W is ground to a predetermined surface.

Further, a vertical direction control mechanism 13 for controlling the vertical movement amount of the wheel head 7 is provided.
The three-dimensional grinding machine with a vertical computer NC device according to claim 1, wherein the grinding surface of the work W curved in the plane direction and the vertical direction is ground to a predetermined surface by the control mechanism 13 and the control mechanism 12. The present invention relates to a work grinding apparatus.

[0006]

[Operation] Work W on the work holding plate 10 on the rotary table 5
When the grinding wheel 11 of the grinding mechanism 9 vertically sandwiched between the grinding wheels 7 is applied to the work W to grind the work W, the rotation angle of the rotary table 5 and A control mechanism 12 for controlling the amount of movement of the carriage 3 on which the turntable 5 is mounted in the front-rear direction.
Is arranged in a three-dimensional grinding machine A with a vertical computer NC device to grind a work W on a predetermined surface, so that the rotary table 5 is rotated by a command from the computer NC device, and at the same time, the rotary table 5 is rotated. A predetermined amount of movement calculated from the rotation angle is given to the feed mechanism 2 of the carriage 3 so that the carriage 3
Is moved in the front-rear direction to sequentially grind the work W clamped by the work holding plate 10 into a predetermined shape.

A vertical direction control mechanism 13 for controlling the vertical movement amount of the wheel head 7 is provided.
Since the program constructed to grind the work W to a predetermined surface according to the shape of the grinding surface of the work W by the control mechanism 13 and the control mechanism 12 is input to the three-dimensional grinder A with the vertical computer NC device, the grinding wheel When 11 is grinding the work W, the rotary table 5 is rotated by a command from the computer NC device, and at the same time, a predetermined movement amount calculated from the rotation angle of the rotary table 5 is applied to the feed mechanism 2 of the carriage 3 and the grindstone 7. By giving the lifting mechanism 8 the carriage 3 in the front-back direction,
By moving the grindstone base 7 in the vertical direction, the grinding surface of the work W sandwiched between the work holding plates 10 is sequentially ground into a predetermined shape that is curved in the horizontal and vertical directions.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a preferred embodiment of the present invention. FIG. 1 shows a vertical computer NC according to an embodiment of the present invention.
2 and 3 are perspective views of a three-dimensional grinder A with a device, and FIGS. 2 and 3 show a case where an inner surface of a square hole of a work W is ground using the three-dimensional grinder A with a vertical computer NC device. 1
An embodiment, FIGS. 4 and 5, illustrate a second embodiment in which the cam-shaped outer surface of the work W is ground.

In the drawing, a carriage 3 is provided on a machine base 1 which is moved back and forth by a feed mechanism 2, and a rotary table 5 which is horizontally rotatable about a main shaft 4 is rotatably provided on the carriage 3.
An elevating mechanism 8 for vertically moving a grindstone base 7 installed on columns 6 standing on the left and right behind the machine base 1 is provided.
A vertical computer NC unit-equipped three-dimensional grinding machine A in which a grinding mechanism 9 for grinding a work W is vertically provided is illustrated.

A work holding plate 10 (chuck, face plate, etc.) is attached to the rotary table 5, and the work W is sandwiched between the work holding plate 10 and the grinding wheel 11 of the grinding mechanism 9 (for example, a cylindrical grinding wheel or a ball-shaped grinding wheel). When the work W is ground by the grinding wheel), a control mechanism for controlling the rotation angle of the rotary table 5 and the amount of movement of the carriage 3 in the front-rear direction by a program preset according to the grinding surface of the work W.
12 is arranged in the three-dimensional grinder A with a vertical computer NC unit and is configured to grind the work W to a predetermined surface.

I First Embodiment: Grinding of Square Holes FIGS. 2 and 3 show a case where square holes are ground on the inner surface of a disk-shaped workpiece W.

The solid square contour line in FIG. 2 indicates a square hole which is punched in the material before grinding, and the chain contour virtual contour line indicates a finished square hole on the inner surface of the product after grinding. ..

For the sake of convenience of explanation, the symbol of the center of the square hole after grinding is O, the radius length of the corner of the peripheral edge of the square hole is r, and the square hole is an angle from the center O. Divide into 8 equal parts
The intersection point of the bisector and the peripheral edge of the regular square hole is indicated by symbols a, b, clockwise from the intersection of the upper peripheral edge of the center of the regular square hole.
c, ... g, h.

The radius of the grinding wheel 11 is r, which is the same as the radius of the corner portion, and the radius O of the grinding wheel 11 is calculated from the length Oa between the upper peripheral edge a and the center O of the square hole. Let L be the length of [Oa-r] after subtracting the length r. (In other words, the length from O to the center of the grinding wheel 11 that grinds a square hole on Oa is L.) The center of the work holding plate 10 is attached to the center of rotation of the rotary table 5. The center of the work W is aligned with the center of the work holding plate 10 and fixed, and the symbol a of the square hole of the work W is used.
And the center of the grinding wheel 11 are opposed to each other on the center line of the machine base 1, and the grinding wheel 11 is rotated so that the distance between the position of the rotation center of the rotary table 5 and the center of the grinding wheel 11 becomes the above L. The carriage 3 is moved forward and the grinding wheel 11 cuts the work W.

(1) Grinding between the reference symbol a and the reference symbol b When the rotation angle C ° of the rotary table 5 continuously rotates counterclockwise from 0 ° to 45 °, the center of the grinding wheel 11 and the rotary table 5 are rotated. A program is made so that the position between the centers of the table becomes an interval of [L / cos C °], and the rotation angle C ° of the rotary table 5 is set by the computer NC device and the actuator.
The amount of movement of the carriage 3 in the front-rear direction is continuously applied to the feeding mechanism 2 to move the carriage 3 forward, so that the portion between the symbols a and b of the square hole of the work W is ground.

(2) Grinding between the symbols b and c For the grinding between C angles of 45 ° to 90 °, the calculated value of C is [B = 90 ° -C °], and the value of C is By replacing B with a program and performing calculation, the feed amount of the carriage 3 corresponding to the rotation angle C ° of the rotary table 5 is given to the feed mechanism 2 in the same manner as described above, and grinding is performed.

(3) Grinding between c, d, e, f, g, h and a The grinding between C and 90 ° to 135 ° is based on the same concept as described above, B '= C °- Grinding between 90 ° and C angle of 135 ° to 180 ° can be done by replacing B '= 180 ° -C °, ... and C value with B', B ",. Calculation is performed, and the carriage 3 is moved in the front-back direction according to the calculated value to grind the regular square inner surface. II Second Embodiment: Grinding of Cam-Shaped Outer Surface FIGS. 4 and 5 show a case where the outer surface of the work W is ground into a cam shape.

The solid contour line of FIG. 4 shows the contour of the material before grinding, and the phantom contour line of the chain line shows the contour of the finished cam-shaped peripheral edge of the product after grinding.

For the sake of convenience of description, the center sign of the peripheral edge of the cam shape after grinding is P, the radius of the base circle of the peripheral edge of the cam shape is s, and the peripheral edge of the cam shape is six angles from the base point P, as described above. Divide into equal parts, and the intersection point of this six bisector line and the cam shape peripheral line is i, j, clockwise from the intersection point of the upper peripheral edge of the cam shape center P.
Let k, m, n, q.

It is assumed that the radius length of the grinding wheel 11 is t, and the length [s + t] obtained by adding the radius length t of the grinding wheel 11 to the radius length s of the cam-shaped base circle is u. (In other words, the spacing between the center of the grinding wheel 11 and the base point P when the workpiece W is ground into the cam shape on the Pi, Pm, Pn, and Pq is u.) The rotary table as described above. The workpiece holding plate 10 is attached to the center of rotation of the workpiece 5 and the workpiece W is fixed to the center of the workpiece holding plate 10 to fix the workpiece W. The position and the center of the grinding wheel 11 are aligned with the center line of the machine base 1 and the grinding wheel 11 is rotated so that the distance between the position of the center of rotation of the rotary table 5 and the center of the grinding wheel 11 becomes the above u. The center of No. 3 is moved to the rear, and the grinding wheel 11 cuts the work W.

(1) Step 1 (External Surface Grinding between Symbols i to j) When the rotation angle D ° of the rotary table 5 is continuously rotated counterclockwise from 0 ° to 60 °, the grinding wheel 11 is rotated. Set the position between the center and the center of the rotary table 5 to s (1 + 0.2 × sinD °)
Computer N by configuring a program so that the intervals are
The cam shape of the work W is obtained by continuously providing the feed mechanism 2 with an amount of forward / backward movement of the carriage 3 corresponding to the rotation angle D ° of the rotary table 5 by the C device and the actuator to move the carriage 3 forward. Reference symbol i of the peripheral approach portion
The part between the symbols j is ground.

(2) Step 2 (grinding between the reference j and the reference k) The grinding of the angle D of 60 ° to 120 ° is performed by setting the value of the angle D to 6
Create a program by replacing 0 ° (that is, grinding wheel 1
Set the position between the center of 1 and the center of the rotary table 5 to s (1 + 0.2
The outer surface of the work W is ground by the grinding wheel 11 to form a so-called cam portion on the outer surface of the work W while keeping the distance of (sin × 60 °)).

(3) Step 3 (outer surface grinding between the reference sign k and the reference sign m) In the grinding process between the angle D of 120 ° and 180 °, the counterclockwise rotation angle E ° of the table 5 is set to F with Pk as the base line. ° =
(60 ° -E °) as D of s (1 + 0.2 × sinD °)
Is replaced with F to make a program and calculate, and the actuator is operated so that the calculated value becomes the distance between the center of the rotating wheel 11 and the center of the carriage 3, and the carriage 3 is moved backward by the feed mechanism 2 of the grinding machine. Move to. (4) Step 4 (code i from code m through n, q
In the grinding process between 180 ° and 360 ° of D, the value of D is replaced with 0 and the feed mechanism of the carriage 3 is stopped (that is, the center position of the grinding wheel 11 and the rotary table 5). The distance between the positions of the centers is s (1 + 0.2 × sin 0 °) = s = radius length of the base circle), the rotary table 5 is rotated, and the outer surface of the work W is ground to i via n and g. To complete the processing.

Further, as in the conventional processing method, the rotary table 5 may be rotated to move the reciprocating table 3 to give a constant cut to the work W and the grinding wheel 11 may grind the outer surface of the work W into a cylindrical shape. It is possible.

Further, in the case of claim 2, a vertical direction control mechanism 13 for controlling the vertical movement amount of the wheel head 7 by the wheel head feed servomotor 16 provided on the top beam 15 installed on the top of the column 6. A vertical computer NC device-equipped three-dimensional grinder with a program provided to grind the outer surface of the work W curved in the plane direction and the vertical direction into a predetermined shape by the vertical direction control mechanism 13 and the control mechanism 12. By inputting into A, when the grinding wheel 11 grinds the work W, the inner and outer surfaces of the work W can be grinded into a predetermined shape by the computer NC device in the three axial directions of x, y and z.

Further, by using a ball-shaped grinding wheel as the grinding wheel 11, it becomes possible to grind the cam-shaped surface into a groove shape.

Further, as shown in FIG. 6, a grinding mechanism 9'for grinding the work W is also provided behind the grindstone 7, and a grinding wheel 11 'having a different shape from the front grinding wheel 11 is attached to this grinding mechanism 9'. However, the work W ground by the grinding mechanism 9 (front side) may be configured such that the reciprocating table 3 is moved backward and the back grinding mechanism 9 ′ continuously grinds the work W.

In the figure, reference numerals 17 and 17 'are grinding wheels 11 and 1.
The motor that rotates 1 ', 18 ・ 18' is a belt.

[0029]

As described above, according to the present invention, the vertical computer NC has the control mechanism for controlling the rotation angle of the rotary table and the movement amount of the carriage in the front-rear direction by the program preset according to the ground surface of the work. Since it is arranged in the three-dimensional grinding machine with a device, it is possible to grind a non-cylindrical workpiece having a curved outer circumference of a rotating grinding wheel by a preset program.

Further, a vertical direction control mechanism for controlling the vertical movement amount of the grindstone is provided, and the non-cylindrical workpiece is ground by the vertical direction control mechanism and the control mechanism. By controlling the amount of movement of the carriage in the front-rear direction and the amount of movement of the lifting mechanism in the vertical direction with respect to the rotation angle of the rotary table by a program preset according to the surface, the workpiece can be moved in a predetermined plane and in the vertical direction. It becomes a work grinding device using a three-dimensional grinding machine with a vertical computer NC device, which is extremely practical and capable of grinding into a shape.

[Brief description of drawings]

FIG. 1 is a perspective view of a work grinding apparatus for a three-dimensional grinding machine with a computer NC device according to an embodiment of the present invention.

FIG. 2 is an explanatory front view of the work before grinding when a square hole is ground in the inner surface of the disk-shaped work according to the first embodiment of the present invention.

FIG. 3 is an explanatory front view of the work showing a state where the grinding process of the first step of the first embodiment of the present invention is completed.

FIG. 4 is an explanatory front view of a cam-shaped work according to a second embodiment of the present invention before grinding.

FIG. 5 is an explanatory front view showing a shape after completion of grinding in a second embodiment of the present invention.

FIG. 6 is an explanatory plan view of a work grinding apparatus of a three-dimensional grinding machine with a computer NC device in which a grinding mechanism is attached to the front and rear of a wheel head according to another embodiment of the present invention.

[Explanation of symbols]

 A Vertical computer NC three-dimensional grinder with work machine W Work 1 Machine 2 Feed mechanism 3 Reciprocating table 4 Spindle 5 Rotary table 6 Column 7 Grindstone head 8 Lifting mechanism 9 Grinding mechanism 10 Work holding board 11 Grinding wheel 12 Control mechanism 13 Up and down Direction control mechanism

Claims (2)

[Claims] 1. A reciprocating table which is moved forward and backward by a feed mechanism is provided on a machine base, and a rotary table which is horizontally rotatable about a main shaft is rotatably provided on the reciprocating machine, and on the left and right behind the machine table. In a three-dimensional grinder with a vertical computer NC device, which is provided with an elevating mechanism for vertically moving a whetstone stand erected on an upright column, and which has a grinding mechanism for grinding a work W on the whetstone stand, the work is placed on the rotary table Attach a holding board,
When the work is clamped by this work holding plate and ground by the grinding wheel of the grinding mechanism, the rotation angle of the rotary table and the amount of movement of the carriage in the front-back direction are set by a program preset according to the grinding surface of this work. A three-dimensional machine with a vertical computer NC device, characterized in that a control mechanism for controlling the above is arranged in the three-dimensional grinding machine with a vertical computer NC device to grind a grinding surface of a workpiece to a predetermined surface. Work grinding machine using a grinding machine. 2. A vertical control mechanism for controlling the vertical movement amount of the grinding wheel head is provided, and the vertical control mechanism and the control mechanism grind a grinding surface of a workpiece curved in a planar direction and a vertical direction to a predetermined surface. A workpiece grinding processing device using a three-dimensional grinding machine with a vertical computer NC device according to claim 1, wherein