JPH0229473B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an NC grinding machine in which a truing tool can be modified on-machine.

Prior Art When the truing tool mounted on the table of a grinding machine increases the number of adjustments to the grinding wheel, the truing tool naturally wears out and no longer maintains the correct shape, so it is often necessary to correct the truing tool. be. Traditionally, this correction was done outside the machine by removing the tool from the table.

Problems to be solved by the invention Since the tool is removed and the work is carried out outside the machine, it takes a lot of setup time to properly set it on the correction table after removing the truing tool, and it is difficult to make accurate corrections due to variations in setting. There was a problem with this.

Means to Solve the Problem A tool for truing a grinding wheel is held between the center of the headstock and tailstock on a table controlled by NC, and is rotated by a kere mawashi. A correction tool for the truing tool is rotatably provided on a grindstone spindle stand or a holding stand supported so as to be positionable in a horizontal correction position and a vertical standby position on the grindstone head, and the correction tool is mounted on the grindstone head. The machine is equipped with a rotary drive device, and the truing tool is corrected on the machine using a correction tool for grinding using NC control.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. A headstock 4 having a spindle fitted with a center 3 is provided on a table 2 placed on a carriage whose position is controlled by an NC on the bed 1. The rotor 5 is driven by a motor 6. Also, on the table 2, a tailstock 8 with a center 7 fitted thereon faces the headstock 4.
A tailstock 9 that slidably supports the tailstock 9 is placed thereon. An arbor 10 having a truing tool 11 fitted therein is supported between the two centers 3 and 7, and is rotated by a kerning turner 5 via a kerf 12. On the grindstone head 13, which is placed on the bed 1 so as to be slidable in a direction perpendicular to the table 2 and whose cutting is controlled by NC, is a grindstone head 15 which rotatably supports a whetstone shaft with a whetstone 14 attached to the shaft end. is fixedly installed, and the grindstone shaft is rotated by a motor 16 via a belt. A bracket 17 is fixedly mounted on the grindstone head 15 or 13, and a holder 19 is fixedly mounted on a pivot shaft 18 which is rotatably supported by a bearing thereof and parallel to the center axis. Holding stand 19
A rotary shaft with a truing tool correction tool 20 fixed to its tip is rotatably supported parallel to the center axis, and a holding table 19 is placed between the horizontal correction position of the truing tool correction tool and the standby vertical position.
A stopper (not shown) is provided for positioning. The pulley 22 at the rear end of the rotating shaft 21 is rotated via a belt and a pulley 24 of a motor 23 on the grinding wheel head 13, and this belt does not come off when the holding table 19 is in the vertical position. It is guided as follows.

Function When the truing tool 11 loses its shape due to wear due to several times of grinding wheel correction, the truing tool 11 fitted in the arbor 10 moves to the center 3,
7 and the burr 12 is rotated by the burr turner 5, and the whetstone head 13 is placed in the retracted position and the holding table 19 is manually rotated to a horizontal position on the front side of the correction position. The motor 23 is driven to rotate the truing correction tool 20. Then, the position and cutting of the table 2 and the grindstone head 13 are controlled by NC, and the truing tool 11 is corrected and shaped by the truing tool correction tool 20. After completing the necessary corrections, move the grinding wheel head 13 backward and move the holding table 1.
9 to the standby position. If necessary, the grindstone is corrected or removed using the truing tool 11 and then stored. The truing tools are of the type that is mounted so that it rotates together with the kerning turn of the headstock as shown in Figure 2, the type that is rotated independently by a motor on the table as shown in Figure 3, and the type that is rotated by a motor independently on the table as shown in Figure 3. As shown in the figure, a configuration in which it is mounted on a tailstock shaft and rotated by a motor can be used at any time. Furthermore, it goes without saying that the tool correction tool for truing may be of a single point type instead of a rotary type. In this case, the attached rotary drive device is not required.

Effects As detailed above, the present invention provides a rotatable truing tool correction tool on a grindstone head or a holding stand positioned at two positions on the grindstone head, and allows the truing tool to be moved between the center of the headstock and the tailstock. Since it is held in between and rotated by turning, the X-axis, Z-axis, and NC control mechanism of the grinding machine can be used as is, eliminating the need for a position control mechanism for correction tools and a dedicated rotation device for truing tools. Therefore, it is possible to provide an inexpensive correction device. Furthermore, the truing tool can be corrected immediately on the machine without being removed, reducing setup time and improving correction accuracy.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the present invention, Figure 2 is a diagram of the truing tool attached to the headstock, Figure 3 is a diagram of the same independent rotating type, and Figure 4 is a diagram of the truing tool also attached to the tailstock. It is. 2...Table, 3,7...Center, 4...Spindle head, 5...Edge turning, 9...Tailstock, 10...
Arbor, 11... Truing tool, 13...
Whetstone head, 14...Whetstone, 15...Wheelstone head, 19
... Holding stand, 20 ... Tool correction tool for truing.

Claims (1)

[Claims] 1 In an NC grinding machine, a tool for truing the grinding wheel is held between the centers of the headstock and tailstock on a table controlled by NC, and is rotated by turning the grinding wheel. A correction tool of the truing tool is rotatably provided on a holding stand supported so as to be positionable in a horizontal correction position and a vertical standby position on a stand or a grindstone, and the correction tool is rotationally driven on the grindstone. 1. An NC grinding machine equipped with a tool correction tool for truing, characterized in that the truing tool is corrected on-machine by NC control for grinding with a correction tool.