JPS61100375A - Internal intercooling type grinding wheel - Google Patents

Abstract

PURPOSE:To dispense with a process removing a residual grinding fluid from a work as well as to make a lowering of work sizing accuracy due to thermal expansion in a wheel preventable without fail, by forming a coolant flow passage inside a base metal of the grinding wheel, and making the coolant flow in the passage. CONSTITUTION:During grinding operation, a coolant flows in a coolant flow passage 11 by way of a coolant feed passage 14, an interconnecting passage 13, a circumferential groove 12 and a coolant inflow passage 9, and afterward it is discharged out through a coolant outflow passage 10, a circumferential groove 15, an interconnecting passage 16 and a coolant discharge passage 17. Therefore, during grinding operation, a grinding wheel 8 is sufficiently cooled from the internal part by the coolant whereby thermal expansion in the grinding wheel 8 due to grinding heat or the like is checked, and a lowering of work sizing accuracy is preventable. In addition, there is unnecessary to sprinkle a grinding fluid over the wheel so that an after-process for removing the grinding fluid is no longer required and, what is more, mixing and sticking of impurities in and to the work by the grinding fluid are all eliminable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a grinding wheel, and more particularly to an internally cooled grinding wheel.

[Technical past of the invention and its problems] - When grinding a workpiece with a grinding wheel, grinding i12 is used to reduce thermal expansion due to heat generated by the grinding wheel and improve the dimensional accuracy of the workpiece. is supplied to the surface of the grinding wheel or the like.

That is, FIG. 3 is a perspective view of the grinding section of a conventional grinding machine, in which an adjustment wheel 3 is rotatably disposed in front of a grinding wheel 2 mounted on a rotating section 1. A workpiece 4, which is an object to be ground, is placed between the facing surfaces of the outer circumferential grinding surface of the grinding wheel 2 and the outer circumferential surface of the adjusting wheel 3, and the workpiece is ground by rotation of the grinding wheel 2 and adjusting wheel 3. The outer peripheral surface of No. 4 is to be ground. By the way, on the left and right sides of the grinding section where the outer peripheral rll ff111 surface of the grinding wheel 2 and the outer peripheral surface of the adjusting wheel 3 face each other, the workpiece 4 is supplied to the grinding section or the ground workpiece is placed. A workpiece guiding member 5.6 is disposed to lead out the workpiece, and a grinding fluid supply device @7 for supplying grinding fluid to the grinding wheel 2, adjustment wheel 3, and workpiece 4 is opened above the grinding section. There is.

Therefore, when grinding the workpiece 4, the workpiece 4 is sequentially sent from the workpiece guide member 5 to the grinding section,
The workpiece 4 is ground by the rotation of the grinding wheel 2 and the adjusting wheel 3, and the 01m liquid is supplied from the grinding fluid supply device 7 to the grinding wheel 2? ; to cool the grinding wheel 2;
Thermal expansion is minimized to increase the dimensional accuracy of the workpiece.

However, in such a device, the grinding fluid adheres to or permeates the workpiece 4 during the grinding process, causing impurities to enter or adhere to the workpiece, and also impairing the aesthetic appearance of the workpiece. There are problems such as the need for a post-process to remove the grinding fluid.

[Purpose of the invention]

In view of these points, an object of the present invention is to obtain a grinding wheel that does not require a step of removing residual grinding fluid from the workpiece and can reliably prevent a decrease in the dimensional accuracy of the workpiece due to thermal expansion of the grinding wheel. shall be.

[Summary of the invention]

The present invention is characterized in that a coolant flow path is formed in the base metal portion of the grinding wheel, and the grinding wheel itself is cooled by flowing the coolant through the coolant flow path.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 2 is a perspective view of the grinding section of a centerless grinder using the grinding wheel 8 of the present invention, and shows the outer circumferential grinding surface of the grinding wheel 8 mounted on the rotary drive shaft 1 and the outer circumferential surface of the adjusting wheel 3. A workpiece 4 is placed between opposing surfaces of the workpiece 4, and the outer circumferential surface of the workpiece 4 is ground by rotation of the grinding wheel 8 and adjustment wheel 3.

By the way, in the base metal part 8a of the grinding wheel 8, as shown in FIG. A coolant flow passage 11 is bored at both ends of the coolant outlet passage 10 in the radial direction and extending in the axial direction of the grinding wheel 8 .

Furthermore, the radially inner end of the coolant inlet passage 9 is connected to a cooling material 1□' drilled in the rotary drive shaft 1 via a circumferential groove 12 and a communication passage 13 provided in the rotary drive shaft 1. It communicates with the supply path 14 , and the radially inner end of the coolant outlet path 10 also communicates with the coolant discharge path 17 via the circumferential groove 15 and the communication path 16 .

Therefore, during the grinding process, the coolant is passed through the coolant supply path 14, the communication path 13, the circumferential groove 12, and the coolant inflow path 9 to the coolant flow path 11, and then the coolant Outflow channel 10. The coolant is discharged through the circumferential groove 15, the communication path 16, and the coolant discharge path 17. Therefore, during the grinding process, the grinding wheel 8 is sufficiently cooled from inside by the coolant, and thermal expansion of the grinding wheel 8 due to grinding heat and the like is suppressed.

Note that water, oil, metal liquids, or air or other gases may be used as the coolant, and the coolant flow passage 11 has an arcuate cross section that extends in the axial direction and expands in the circumferential direction. etc., it can be made into various shapes.

〔Effect of the invention〕

As explained above, in the present invention, a coolant flow path is formed in the base metal part of the grinding wheel, and the grinding wheel itself is cooled from the inside by flowing the coolant through the coolant flow path. It is possible to prevent a decrease in the dimensional accuracy of the workpiece due to thermal expansion of the grinding wheel during the grinding process, and a conventional grinding fluid supply device is installed at the top of the grinding section, allowing the grinding fluid to be applied to the grinding wheel, etc. There is no need,
There is no need for a lengthy process to remove the grinding fluid, and it is possible to eliminate contamination and adhesion of impurities to the workpiece due to the grinding fluid.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of the internally cooled fJJ type grinding wheel of the present invention, Fig. 2 is a perspective view of the grinding section of a grinding machine using the above-mentioned internally cooled grinding wheel, and Fig. 3 is a view of a conventional grinding machine. It is a perspective view of a grinding part. 1... Rotation drive shaft, 2, 8... Grinding wheel, 3...
Adjustment wheel, 4... Work, 8a... Base metal part, 11...
・Coolant flow path. Book 2 illustration

Claims (1)

[Claims] An internally cooled grinding wheel, characterized in that a coolant flow path is formed in the base metal part of the grinding wheel, and the grinding wheel itself is cooled by flowing the coolant through the coolant flow path.