JPS629867A - Grinder - Google Patents

Abstract

PURPOSE:To enhance grinding efficiency, by providing a wheel diameter measuring device, grinding surface detecting device and a control device so as to continually catch wearing of a wheel diameter and control a wheel to easily approach to a grinding surface, in the case of a grinder in a surface grinding machine. CONSTITUTION:A grinder provides a light emitting element 11 and a light receiving element 13 to be opposed interposing a wheel 5 mounted to a wheel shaft 3, and if the wheel is moved on a scale 15, the grinder detects a wheel diameter in a position where light is shielded by the wheel 5. While a probe 21, for detecting height of a work, is set longer by DELTAX than the wheel diameter through a probe position detecting scale 23. And the grinder, lowering the wheel 5 to be stopped when the probe 21 is brought into contact with the work W, performs grinding by setting the wheel 5 to a grinding position. If the wheel 5 generates no wearing, it is decided whether or not a ground surface is in the finished dimension, and the grinder ends the grinding or corrects the wheel position. While the grinder, if the wheel 5 is worn, corrects the wheel position in accordance with wearing of the wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a grinding device, and more particularly to a grinding device equipped with means for detecting a grinding surface of a workpiece.

[Technical background of the invention and its problems] Generally, in the case of grinding using a surface grinder, the grindstone is constantly worn during the processing, reducing the processing accuracy.

In order to prevent this, it is necessary to measure the ground surface and make preparations for that purpose, but this work takes time. Furthermore, during grinding, it is difficult for unskilled workers to lower the whetstone to the grinding surface of the workpiece. There was a problem in that the grindstone that was used for the dressing process was worn out.

In the case of conventional surface grinders, this is a grinding machine that grasps changes in the diameter of the grinding wheel due to grinding wheel wear, calculates the distance from the bottom surface of the grinding wheel to the grinding surface, and accurately detects the height of the workpiece grinding surface. This is because surface detection means was not provided.

[Purpose of the Invention] This invention was made in view of such conventional problems, and is equipped with a grinding wheel diameter S1 measurement device and a probe for detecting the grinding surface, so that grinding wheel wear can be constantly monitored and processed. It is an object of the present invention to provide a grinding device that can improve dimensional accuracy and can simply lower a grindstone to the correct position on the grinding surface of a workpiece.

[Structure of the Invention] The present invention includes a grindstone rotating device, a grindstone diameter measuring device, a probe for detecting a grinding surface, and a control for setting the length of the probe in accordance with a measurement value by the grindstone diameter measuring device. This is a grinding device comprising a device.

[Embodiment of the Invention] FIG. 1 is a block diagram of a circuit of one embodiment, and FIGS. 2 to 4 show the mechanical configuration. The grindstone rotating device 1 has a structure in which a grindstone 5 is attached to a rotating shaft 3 and housed within a cover 7. Further, the grindstone diameter measuring device 9 includes a light emitting element 11 and a light receiving element 13 facing each other with the grindstone 5 in between, and is configured to move in the radial direction along the grindstone axis position detection scale 15. The sensor driver 8 device 17 emits light from the light emitting element 11 to the light receiving element 13 while moving on the scale 15, and the detection circuit 19 detects the position where the light is blocked by the grinding wheel 5, and detects the diameter of the grinding wheel 5. It is a structure that can be learned.

A probe 21 for detecting the height of the workpiece W on the magnetic jack M can be set at a predetermined height position above or below a probe position detection scale 23. This probe 21 is connected to a ground surface detection device 25, and when it comes into contact with the ground surface of the workpiece W, it emits a ground surface detection signal.

As shown in FIG. 1, these grindstone rotating device 1 degree grindstone diameter measuring device 9. The grinding surface detection device 25 is controlled by a control device 27. The control device 27 also includes a calculation device 29 .

In the grinding device having the above configuration, the grinding wheel 5 is rotated by the grinding wheel rotation device 1.
is rotated, and the grindstone 5 is brought into contact with the grinding surface of the workpiece W by descending, thereby performing surface grinding. The operations of detecting the grinding surface of the workpiece W, measuring the diameter of the grindstone 5, and measuring the grinding dimensions during this processing will be explained based on the flowchart shown in FIG.

The grindstone rotation device 1 starts rotating the grindstone 5 . (Step 41) Next, the diameter of the grindstone is measured. This grinding wheel diameter measurement is performed by moving the grinding wheel in the direction of the axis 3 on the scale 15 while emitting light from the light emitting element 11 and having it received by the light receiving element 13.
This is done by knowing the diameter when the light is blocked by the outer periphery of the . (Step 43) Next, the height position of the probe 21 is set. The position setting of this probe 21 is ΔX with respect to the measured grindstone diameter R.
probe 21 from the center of axis 3.
The distance to the lower end of is (R+Δ×). (Step 4
5.47) Next, the grinding wheel 5 is lowered and the probe 2
When the grinding surface detection device 25 detects that the grinding surface 1 comes into contact with the workpiece W, the lowering is stopped and the grinding start position is set.

(Steps 49 and 51) Next, grinding is started, and the diameter of the grindstone is periodically measured. Then, when the grindstone 5 is not worn and the grinding process is progressing smoothly, it is determined whether the finished dimensions of the ground surface are met. (Steps 53 to 59) If the finished dimensions are reached here, the grinding is completed, and if not, the grindstone position is corrected.

(Steps 61 and 63) This correction of the grindstone position is a correction that further lowers the shaft 3 and further advances the grinding.

Note that if the diameter of the grindstone becomes smaller due to wear during grinding, grinding cannot be performed effectively, so the position of the grindstone is corrected even when it is determined in step 57 that the grindstone is worn. . (Step 63) In the above embodiment, a probe for detecting the ground surface that makes mechanical contact with the work surface is shown, but a photoelectric element or other probe that performs electrical detection may also be used. In addition, in step 57, it is also possible to determine whether the diameter of the grindstone is smaller than the effective minimum dimension, and in that case, the grindstone may be stopped for replacement.

[Effects of the Invention] Since the present invention is equipped with a grindstone diameter measuring device, it is possible to constantly grasp the degree of wear of the grindstone during grinding.
The dimensional accuracy of surface grinding can be improved. Furthermore, since the grinding surface of the workpiece is detected by the probe, even an unskilled person can easily place the grindstone at the correct lowering position, thereby increasing the grinding efficiency.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram of an embodiment of the invention, FIG. 2 is a bottom view of the embodiment, and FIG. 3 is a plan view of the embodiment.
FIG. 4 is a side view of the same embodiment, and FIG. 5 is a 70-chirate showing the operation of the above embodiment. 1... Grinding wheel rotation device 9... Grinding wheel diameter measuring device 2
1... Probe 27... Control device Fig. 1

Claims (1)

[Claims] A grinding device comprising a grindstone rotating device, a grindstone diameter measuring device, a probe for detecting a grinding surface, and a control device that sets the length of the probe in accordance with a measurement value by the grindstone diameter measuring device.