JPH03161256A - Surface grinding - Google Patents

Abstract

PURPOSE:To carry out suitable surface grinding without interference of the right side surface and the left side surface of a work and an emery wheel by inversely transferring a table in the right and left directions in the state where the work is positioned in the position vertically below the rotation shaft of a wheel spindle. CONSTITUTION:At first, a work W is supported and fixed on a table 11. Secondly, a grinding wheel 19 provided in the position vertically above the table 11 is rotated through a rotation shaft and is made to descend in accordance with the amount of the depth of cut. Simultaneously, in the state where the work W is positioned in the position vertically below this rotation shaft, this table 11 is inversely transferred in the right and the left directions so that required surface grinding is carried out against the work W.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a surface grinding method in which a grinding wheel does not interfere with the right side or left side of a workpiece.

(Prior Art) To explain a general surface grinding method, first, a workpiece is supported and fixed on a table in a surface grinding machine. Then, the rotatable grinding wheel is lowered via the rotating shaft, and the table is reversely moved in the left and right direction. Conventionally,
The table has a first table position where the left side of the workpiece is located to the right of the vertically downward position of the rotational axis of the grinding wheel, and a first table position where the right side of the workpiece is located to the left of the vertically downward position of the rotational axis of the grinding wheel. It was designed to move inverted between two table positions. In other words, the grinding wheel has a first position where the vertical position of the rotating shaft is located to the left of the left side surface of the workpiece, and a second grinding wheel position where the vertical position of the rotating shaft is located to the right of the right side surface of the workpiece. During this period, the grinding wheel is reversely moved in the left and right direction relative to the table.

(Problem to be Solved by the Invention) However, in the conventional surface grinding method, the grinding wheel is invertedly moved in the left-right direction relative to the table between the first grinding wheel position and the second grinding wheel position. Therefore, when the grinding wheel was lowered to make a predetermined depth of cut, the grinding wheel interfered with the right and left sides of the workpiece. This has caused problems such as damage to the grinding wheel and vibrations caused by the interference that cause patterns to appear on the grinding surface of the workpiece, making it impossible to perform proper surface grinding.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide a surface grinding method that does not dry out the right and left sides of a workpiece and the grinding wheel.

[Structure of the Invention (Means for Solving the Problems) In order to solve the conventional problems as described above, in the present invention, after the workpiece is supported and fixed on the table, a grindstone is installed at a position vertically above the table. Rotating the wheel via the rotating shaft, lowering the wheel relative to the table, and reversing the table in the left-right direction with the workpiece positioned vertically below the rotating shaft. This method performs surface grinding.

(Function) In the above configuration, first, the workpiece is supported and fixed on the table. Then, the grinding wheel is rotated via the rotating shaft and lowered according to the depth of cut, and the table is reversely moved in the left and right direction, thereby making it possible to perform the desired surface grinding on the workpiece. It is something.

Under the above action, the table reversely moves in the left and right direction with the workpiece positioned vertically below the rotating shaft of the grinding wheel, so the table moves between the right and left sides of the workpiece. There is no interference from the grinding wheel.

(Example) The surface grinder 1 used in this example is shown in Fig. 3.
Referring to FIG. 4, the surface grinding machine 1 includes a box-shaped lower frame 3, and a rear side of the lower frame 3 (back side facing the paper in FIG. 3, right side in FIG. 4) in the vertical direction. The column 5 is provided extending to the column 5. A saddle 7 is provided on the lower frame 3 so as to be movable in the front and rear directions (in the front and back directions toward the page in FIG. 3, and in the left and right directions in FIG. 4). In order to automatically move the saddle 7 in the longitudinal direction, a servo motor (
(not shown), and a first handle 9 is provided on the lower frame 3 to manually move the saddle 7 in the front-rear direction.

A table 11 for supporting and fixing the workpiece W is provided on the saddle 7 so as to be movable in the left-right direction. In order to automatically move the table 11 in the left-right direction, an actuator (not shown) such as a drive motor or a hydraulic cylinder is provided at an appropriate position.
A second handle 13 is provided on the saddle 7 in order to manually move it left and right. In order to reversely move the table 11 in the left-right direction, the table is provided with a dog 15 whose position can be adjusted in the left-right direction, and the saddle 7 is provided with a sensor 17 such as a proximity switch. Note that the sensor 17 is not limited to a proximity switch, and a limit switch may be provided instead of the proximity switch.

A machining head 21 equipped with a grinding wheel 19 is provided on the column 5 so as to be movable up and down. A drive motor 23 is provided at an appropriate position to automatically move the processing head 21 up and down, and a manual handle 25 is provided on the lower frame 3 to manually move the processing head 21 up and down. There is. The grinding wheel 19 is rotatable via a rotating shaft 27, and is rotated by appropriately operating a drive motor 29 attached to the processing head 21. Note that the length of the one grinding wheel in the front-rear direction is longer than the length of the workpiece W in the front-rear direction.

A vibration sensor 31 is provided at an appropriate position on the processing head 21 in order to detect that one grinding wheel has come into contact with the upper surface of the workpiece W due to the lowering of the processing head 21 . Note that the vibration sensor 31 may be provided on the table 11 instead of being provided on the processing head 21. Without providing the vibration sensor 31, the operator may visually detect contact between one grinding wheel and the workpiece W.

Next, the outline and operation of this embodiment will be explained based on the flowcharts of FIGS. 1 and 2.

First, the workpiece W is supported and fixed on the table 11 (step 1). Then, the horizontal positions of the pair of sensors 17 are adjusted to set the reverse movement stroke of the table 11 (step 2). Here, regarding the setting of this stroke, when the grinding wheel 19 is reversed between the rightmost part and the leftmost part as shown in No. 16, the workpiece W is positioned vertically below the rotating shaft 27 of one grinding wheel. The stroke of the table l1 is set so that the position is maintained.

The table 1 is moved in the left-right direction to position the table 11 at the stroke starting end (in other words, at the rightmost or leftmost position in the stroke of the table 11) (steps 3 and 4).

Next, the drive motors 2B and 29 are operated appropriately to rotate the grinding wheel 19 and lower the processing head 21 (
Step 5). Then, by bringing one grinding wheel into contact with the top surface of the workpiece W, the vibration sensor 31 is turned on (steps 6 and 7), and the actual cutting of one grinding wheel is started, and the vibration sensor 31 is turned on via the drive motor 23. Processing head 2
1 descends in accordance with the depth of cut (steps 8 and 9).

Further, the table 11 is moved leftward (or rightward) to position the table 11 at the end of the stroke (in other words, at the leftmost or rightmost point in the stroke of the table l1) (step 10.11).

Then, when the cutting of the grinding wheel 10 has been completed, spark out is started, and when the cutting of one grinding wheel has not been completed, the process is fed back to step 8 (step 12.13). After completing the spark-out, move the table 11 to the right, position it at the rightmost position in the stroke of the table 11, and finish the surface grinding (
Step 14.15).

Note that the product is obtained by cutting the right and left sides of the workpiece W that have not been ground. Furthermore, when surface grinding is performed using workpieces W (for support) for supporting the central workpiece W from both left and right sides, the central workpiece W becomes the product.

According to the embodiment, the workpiece W is positioned vertically below the rotating shaft 27 of the grinding wheel 19, and the table 11 is reversely moved in the left-right direction.
There is no interference between the right side and left side of the grinding wheel. Therefore, it is relatively less likely that one grinding wheel will be damaged or that a pattern or the like will be formed on the grinding surface of the workpiece W due to vibration and that proper surface grinding cannot be performed.

It should be noted that the present invention is not limited to the description of the embodiments described above, and can be implemented in various other forms by making appropriate changes.

[Effects of the Invention] As can be understood from the explanation of the above-mentioned examples, according to the present invention, the workpiece is positioned vertically below the rotating shaft of the grinding wheel, and the table is moved in the left and right direction. Since the workpiece is moved in reverse, there is no interference between the right and left sides of the workpiece and the grinding wheel. Therefore, it is relatively less likely that the grinding wheel will be damaged or that a pattern or the like will appear on the grinding surface of the workpiece due to vibrations, making it impossible to perform proper surface grinding.

4. BRIEF DESCRIPTION OF THE DRAWINGS The drawings are for explaining embodiments of the present invention.
The figure shows the main parts of this embodiment. FIG. 2 is a diagram showing a flowchart. FIG. 3 is a front view of the surface grinder. FIG. 4 is a side view of the surface grinder.

1... Surface grinder 11... One table... Grinding wheel

Claims (1)

[Claims] After the workpiece is supported and fixed on the table, a grinding wheel installed vertically above the table is rotated via a rotating shaft.
Surface grinding is performed by lowering the workpiece relative to the table and reversing the table in the left-right direction while the workpiece is positioned vertically below the rotation axis. Surface grinding method.