JPS6260223B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a positioning device for positioning a grindstone and a workpiece in a horizontal axis rotary surface grinder, etc., and inspecting the accuracy of mounting the workpiece. .

(Conventional structure and its problems) Very few small horizontal axis rotary surface grinders are equipped with a high-precision positioning device, and the The depth of cut of the tool is determined and the feed mechanism of the table is used to perform the cutting of the tool. For this reason, there was a problem in that machining accuracy was affected by the mounting condition of the workpiece on the machine, the wear condition of the grindstone, etc.

In a relatively large rotary surface grinding machine, as shown in FIG. It controlled the position of the axis. However, with the above configuration, in a machine with a small table, there is less space for the measurement head to be installed, measurement accuracy deteriorates due to the effects of air and grinding fluid that move around the grinding wheel when the spindle rotates at high speed, and there are also problems with the measurement accuracy. There were problems such as the need to adjust the position of the measuring head every time the height of the workpiece changed.

(Object of the Invention) In view of the above-mentioned drawbacks of the conventional example, the present invention enables highly accurate positioning even in a small machine, and eliminates the need to change the mounting position of the measuring head even if the height of the workpiece differs. The purpose of the present invention is to provide a positioning device that can also measure the accuracy of attachment of a workpiece to a machine.

(Structure of the Invention) In order to achieve the above object, the present invention provides a position detector having a position detection end and a reference surface on the back surface thereof, and a position detector that is connected to a tool and a workpiece during position detection. A means of inserting the tool between the two and placing the reference surface in contact with the tip of the tool, and the position of the spindle when the workpiece side spindle is moved to bring the workpiece mounting jig surface into contact with the detection end. a position measuring device that measures the workpiece, an angle indexing device that rotates the surface of the workpiece mounting jig to set multiple detection positions by the detection end, an input device that inputs various information, and an input device that inputs various information. and an arithmetic unit that calculates the movement distance of the spindle and the like.

According to this configuration, the above object can be achieved even in a small machine without being affected by the atmosphere during processing.

(Description of Examples) Examples will be described below with reference to the drawings.

2 to 4 show a positioning device according to an embodiment of the present invention, 11 is a cup-shaped grindstone, 12 is a workpiece, 13 is a workpiece attachment jig, 14 is a chuck, 15 is a table, 1
6 is an auto switch cylinder, 17 is an arm, 18 is a position detector, 19 is a motor, 20 is a linear encoder, 21 is a photocoupler, 22 is a disc having a notch, and 23 is a ball screw.

FIG. 5 shows the position detector 18. 31 is a reference plane, 32 is a position detection end, and a minute displacement meter is used.

The operation of the positioning device configured as above will be explained below. First, input the distance between the position detection end 32 and the reference surface 31, the finished dimensions of the workpiece, and the maximum allowable runout of the jig surface when the workpiece pasting jig is installed on the machine into the calculation section. (The input section and calculation section are not shown). The workpiece pasting jig 13 with the workpiece 12 pasted thereon is attached to the chuck 14. The positioning operation is performed as follows.

First, the rotation of the spindle is stopped at a position where the notch portion of the disk 22 having N notches provided in the spindle on the workpiece side coincides with the position of the photocoupler 21, and this state is maintained. Then, as shown in FIG. 3, the arm 17 is rotated toward the grinding wheel by the motor 19 connected via the shaft 16 containing an auto switch cylinder, and the position detection end 32 is rotated toward the grindstone. It is moved to the surface of the workpiece attachment jig and to a range where the reference surface 31 of the position detector can come into contact with the cup-shaped grindstone processing surface.

Next, as shown in FIG. 4, the table 15 is attached to the position detection end 32 and the workpiece while keeping the position detector reference surface 31 in contact with the cup-shaped grindstone 11. Move the jig 13 until it makes contact. Position detection end 3
2 and the workpiece attachment jig 13 are set as the origin on the linear encoder 20. Subsequently, the table is moved to sufficiently separate the position detection end 32 and the workpiece attachment jig 13. Next, the spindle is rotated on the workpiece side, and the spindle rotation is stopped at a position where the next notch provided in the disk 22 and the photocoupler 21 coincide with each other, and this state is maintained.
The table 15 is moved until the position detection end 32 and the workpiece pasting jig 13 come into contact. The point where the position detection end 32 and the workpiece attachment jig 13 come into contact is read on the linear encoder 20. This operation is repeated (N-1) times, and the amount of runout of the jig surface for attaching the workpiece is calculated from the read data and compared with the initially input maximum allowable jig surface runout value. If the shake amount is within the allowable value, the average value of the values read by the linear encoder 20 is set as the new origin. Move the table to sufficiently separate the position detection end 32 and workpiece attachment jig 13, activate the auto switch cylinder to prevent the position detector reference surface 31 from coming into contact with the cup-shaped grindstone 11, and then rotate the arm 17. and return the position detector 18 to its initial position. Machining is started and completed at a position where the table is moved from the new origin toward the grindstone by a value obtained by subtracting the finished dimensions of the workpiece from the input distance between the position detection end and the reference surface.

In the above embodiment, the reference surface of the position detector is brought into contact with the tool side, but it may be brought into contact with the workpiece side. In this case, the workpiece side is fixed and the tool side moves.

(Effects of the Invention) As described above, the present invention provides a position detector equipped with a means for inserting and installing between a tool and a workpiece, a spindle angle indexing device and a position measuring device,
By providing a calculation section, it is possible to perform processing with high dimensional accuracy, taking into account the installation accuracy of the workpiece, even with a small machine, and it is also necessary to adjust the measurement head etc. even if the height of the workpiece differs greatly. This has the effect of preventing

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional vertical axis surface grinder, FIG. 2 is a perspective view of a horizontal axis rotary surface grinder according to an embodiment of the present invention, and FIGS. 3 and 4 are position detectors. FIG. 5 is a front view of the position detector. 11... Cup-shaped grindstone, 12... Workpiece, 13...
Workpiece attachment jig, 16... auto switch cylinder, 17... arm, 18... position detector, 20... linear encoder, 21... photo coupler, 22... disc having a notch.

Claims (1)

[Claims] 1. In a tool and workpiece positioning device for a surface grinder in which a flat tool and a workpiece mounting jig surface to which a workpiece is attached are arranged to face each other, position detection is provided. a position detector having a reference surface on an end and a back surface of the detection end; the reference surface of the position detector contacts the fixed side of either the tool tip surface or the workpiece mounting jig surface during position detection; position detector setting means for moving and setting the position detector between the tool and the workpiece so that the workpiece mounting jig surface or the tip end surface of the tool is located at the detection end of the position detector; a position measuring device that measures the position of the spindle in the direction of its rotation axis when the moving spindle is moved in the direction of its rotation axis so as to make contact; and a position measuring device that measures the position of the spindle in the direction of its rotation axis; an angle indexing device for setting the position or more; an input section for inputting information such as the distance between the detection end of the position detector and the reference surface and the finished dimensions of the workpiece; A positioning device comprising: a calculation unit that calculates the moving distance of the workpiece, the inclination of the workpiece, etc.