JPH0627335Y2 - Grinding machine with coolant supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a grinding device provided with a coolant supply device that changes a coolant supply location according to rough grinding and finish grinding.

<Prior Art> In general, a grinding apparatus performs grinding by moving a rotating grindstone toward and away from a rotating workpiece and supplying a coolant between the workpiece and the grindstone. The coolant generates a dynamic pressure between the workpiece and the grindstone, and the workpiece flexes toward the opposite side of the grindstone.

<Problems to be Solved by the Invention> When the workpiece has an oil hole, the amount of flexure of the workpiece changes between a portion having an oil hole and a portion having no oil hole. As a result, there is a problem that a dent is formed around the oil hole due to grinding.

<Means for Solving the Problems> The present invention has been made to solve the above-mentioned problems, and the coolant is supplied toward the grindstone during the rough grinding by the command from the control device, and the coolant is machined during the finish grinding. A coolant nozzle drive device for moving the coolant nozzle so that the coolant nozzle is supplied toward an object is provided.

<Operation> When the grindstone is fed to the work piece by rough grinding, the coolant nozzle is moved by the drive device for the coolant nozzle so that the coolant is supplied to the grindstone, and the grindstone is fed to the work piece by finishing grinding. At times, the coolant nozzle drive moves the coolant nozzle so that the coolant is directed toward the workpiece.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a bed, on which a grindstone base 11 is guided so as to be movable in the left-right direction, and a table 12 is moved on the bed 10 in a front-back direction orthogonal to a moving direction of the grindstone base 11. It is possible to be guided. The grindstone 11 is moved by a servomotor 13 attached to the bed 10 via a ball screw (not shown), and the table 12 is similarly moved by a servomotor (not shown).

A grindstone 14 is rotatably supported on the grindstone base 11 so as to be rotatable around a horizontal axis perpendicular to the feed direction of the grindstone mount 11.
A cover 15 for covering is attached to the grindstone base 11. Further, a grindstone driving motor 19 for rotating the grindstone 14 via pulleys 16 and 17 and a belt 18 is installed on the grindstone base 11. A spindle stock 22 is installed on the table 12, and a spindle 23 is rotatably supported on the spindle stock 22 about an axis parallel to the grindstone 14, and a chuck 24 for gripping a workpiece W is attached to the spindle 23. Has been. A tailstock (not shown) is installed on the table 12 at a position facing the headstock 22, and one end of the workpiece W is center-supported by the tailstock.

A coolant nozzle 31 is mounted on the grindstone cover 15 via a mounting plate 30 so as to be pivotable about an axis parallel to the rotation axis of the grindstone 14, and a coolant nozzle motor (coolant nozzle drive device) installed on the grindstone cover 15 is mounted. Three
It is adapted to be driven to rotate by gears 2 through gears 33 and 34. The coolant nozzle 31 has a pump 3
5, the coolant pumped up from the tank 36 is supplied.

Reference numeral 40 denotes a numerical controller, which is connected to the servomotor 13 via a drive circuit 41 and also to a sequence controller 42. The sequence controller 42 is connected to the pump driving motor 43,
It is also connected to the grindstone drive motor 19 and the coolant nozzle drive motor 32.

Next, the operation will be described based on the flowchart of FIG. When a command is given from the numerical control device 40, the grindstone 1
1 advances fast forward, the grindstone driving motor 19 rotates the grindstone 14, and the main shaft 23 rotates. When the coolant is supplied to the coolant nozzle 31 by the pump 35 in a state where the coolant nozzle 31 is swung to the grindstone 14 side, the coolant is supplied from the coolant nozzle 31 to the grindstone 14. This coolant rotates with the grindstone, and grindstone 1
When the work W approaches 4 the dynamic pressure is generated between the work W and the grindstone 14.

Next, the grindstone base 11 is fed to the rough grinding, and the work W is roughly ground. Oil holes Wa are formed in the workpiece W in the radial direction. When the oil holes Wa correspond to the grindstone 14, the dynamic pressure due to the coolant is reduced, and the deflection of the workpiece W is reduced. Whetstone 1 in oil hole Wa
At a position where 4 does not correspond, the dynamic pressure due to the coolant becomes large, and the workpiece W largely bends to the side opposite to the grindstone 14. As a result, a recess is formed around the oil hole Wa.

Further, the grindstone 11 is subjected to finish grinding feed, and the coolant nozzle motor 32 is driven according to a command from the sequence control device 42 to rotate the coolant nozzle 31 to the opposite side of the grindstone 14 to supply the coolant to the workpiece W. As a result,
The amount of coolant that goes around the grindstone 14 decreases, the dynamic pressure generated between the grindstone 14 and the workpiece W decreases, and the degree of change in the bending of the workpiece W depending on the presence or absence of the oil hole Wa decreases. While the workpiece W is being finished, the depressions around the oil hole Wa generated during rough grinding are reduced.

When the finishing process is completed, the grindstone base 11 is retracted, the rotation of the grindstone 14 and the spindle 23 is stopped, and the supply of the coolant is stopped. The workpiece W is removed from the chuck 24, and the processing is completed.

In the above-described embodiment, the example in which the coolant nozzle 31 is swung is described, but the coolant nozzle 31 may be moved forward and backward in the feed direction of the wheel head 11 by a cylinder.

<Effects of the Invention> As described above, according to the present invention, the coolant nozzle is supplied to the grindstone at the time of rough grinding and the coolant is supplied to the workpiece at the time of finish grinding according to the command from the controller. Since the drive device for the coolant nozzle that moves the is provided, the effect of eliminating the dents around the oil holes generated during the rough grinding can be obtained during the finishing process.

[Brief description of drawings]

FIG. 1 is a diagram showing a grinding device provided with a coolant supply device according to the present invention, and FIG. 2 is a flowchart showing a machining operation of a workpiece. 11 ... Whetstone stand, 14 ... Whetstone, 15 ... Whetstone cover,
31 ... Coolant nozzle, 32 ... Coolant nozzle motor (coolant nozzle drive device), 35 ... Pump, 40 ... Numerical control device, 42 ... Sequence control device, W ... Workpiece, Wa ... Oil hole.

Claims (1)

[Scope of utility model registration request] 1. A rotating grindstone is provided so as to be able to approach and separate from a rotating work piece, and a control device for feeding the grindstone to the work piece by rough grinding and finish grinding is provided, and between the grindstone and the work piece. In a grinding machine equipped with a coolant supply device that supplies coolant through a coolant nozzle, the coolant is supplied to the grindstone during rough grinding and to the workpiece during finish grinding according to a command from the control device. A grinding device equipped with a coolant supply device, characterized in that a coolant nozzle drive device for moving the coolant nozzle is provided.