JP2004114194A - Coolant discharging device for cylindrical grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coolant discharging device which always pours coolant on a proper portion of a workpiece corresponding to a change of the shape of a grinding wheel and various kinds of shapes of the workpiece. <P>SOLUTION: This coolant discharging device 20 for a cylindrical grinding machine is mounted on a wheel spindle stock 10 of the cylindrical grinding machine to pour the coolant on the workpiece W. The device 20 is provided with a nozzle part 23 having a discharge port to discharge the coolant, provided to be movable in an opposite direction of the grinding wheel T and the workpiece W, energized to the workpiece W side, and pushed to the grinding wheel T side by abutting on the workpiece W. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coolant discharge device, and more particularly, to a coolant discharge device for a cylindrical grinding machine mounted on a grindstone table of a cylindrical grinder and bathing a coolant on a workpiece.
[0002]
[Prior art]
In a cylindrical grinding machine, a workpiece is arranged facing a grinding wheel, and the rotating grinding wheel is brought into contact with the outer peripheral surface of the workpiece to perform grinding while rotating the workpiece. Therefore, there is a possibility that the workpiece may be burnt by grinding. Therefore, in order to prevent grinding burn, it is possible to mount a coolant discharge device on a grindstone table supporting a grinding wheel, discharge a coolant from the coolant discharge device, bathe the work, and cool the work. It is usually done. Here, in order to prevent grinding burn, it is preferable to cool the workpiece immediately after grinding, and it is effective to pour the coolant on the part near the grinding action point, which is the contact part between the grinding wheel and the workpiece. It is. Therefore, in a conventional coolant discharge device, a nozzle portion having a coolant discharge port is positioned and fixed to an appropriate portion so that an appropriate portion of a workpiece can be cooled.
[0003]
[Problems to be solved by the invention]
In the conventional coolant discharge device, since the nozzle portion is positioned and fixed, the diameter of the grinding wheel is reduced by modifying the grinding wheel, or the diameter of the grinding wheel is increased by replacing the grinding wheel. When the position is changed, there is a possibility that an appropriate portion of the workpiece cannot be poured with the coolant. Further, when grinding is performed on workpieces of various shapes, the diameter of the workpiece changes for each workpiece. Also in this case, there is a possibility that the cooling liquid cannot be applied to an appropriate part of the workpiece.
[0004]
In addition, by supporting the nozzle portion via a flexible hose or the like that can be bent by hand, the position of the nozzle portion can be appropriately changed, and the position of the nozzle portion is changed according to the position of the grinding action point and the shape of the workpiece. You may make it adjust. However, in such a mode, every time the position of the grinding action point is changed or the shape of the workpiece is changed, it is necessary to readjust the position of the nozzle portion, and the setup operation becomes complicated. It creates new problems. In addition, when the workpiece is attached or detached, there is a possibility that the location of the nozzle may be inadvertently shifted by bringing the workpiece or a hand into contact with the nozzle. Therefore, it is necessary to frequently check whether or not the nozzle portion is fixed at an accurate position, and this also complicates the operation.
[0005]
The present invention has been made in view of the above circumstances, and in response to a change in the shape of a grinding wheel or a work having various shapes, a coolant that can always be provided with a coolant at an appropriate portion of the work. It is an object to provide a discharge device.
[0006]
[Means for Solving the Problems]
The coolant discharge device according to claim 1, wherein the coolant discharge device is a coolant discharge device for a cylindrical grinding machine mounted on a grindstone table of a cylindrical grinder and bathes the coolant on a workpiece. A nozzle portion provided so as to be movable in a direction in which the grinding wheel and the workpiece are opposed to each other, urged toward the workpiece, and pushed toward the grinding wheel by contact with the workpiece. It is assumed that.
[0007]
Here, means for movably providing the nozzle portion is not particularly limited to a specific structure. For example, the nozzle portion may be slidably supported on a grindstone table or may be rotatably supported. Just fine.
[0008]
In the present invention, the nozzle portion urged toward the workpiece is pushed toward the grinding wheel by abutting on the workpiece. For this reason, even if the position of the grinding action point is changed or the shape of the workpiece is changed, the nozzle portion remains at a fixed position with respect to the workpiece. Therefore, at the time of the grinding process, the nozzle portion is always automatically positioned at an appropriate portion, and the coolant discharged from the nozzle portion is poured onto an appropriate portion of the workpiece, whereby Generation of grinding burn is efficiently prevented.
[0009]
The coolant discharge device according to claim 2 is the coolant discharge device according to claim 1, wherein the nozzle portion includes a nozzle body having the discharge port, and a contact member that contacts the workpiece. The contact member is detachably attached to the nozzle body.
[0010]
Here, the means for detachably attaching the contact member to the nozzle body is not particularly limited to a specific structure, and means using a set screw or a male member or a female member for the contact member. The nozzle body may be detachably attached to the female side or the male side by various means such as a means of fitting each other.
[0011]
In the cylindrical grinder, since the workpiece is rotated to perform the grinding, the workpiece and the nozzle portion may be rubbed during the grinding process, and the nozzle portion may be worn. Therefore, in the present invention, the nozzle body having the cooling liquid discharge port and the contact member that contacts the workpiece are formed separately, and the contact member is detachably attached to the nozzle body. Accordingly, when the contact portion with the workpiece is worn, maintenance management can be performed by replacing the contact member without replacing the entire coolant discharge device or the entire nozzle portion, and it is possible to maintain the coolant. The maintenance of the discharge device is simplified.
[0012]
In addition, the contact member has a whole or at least a contact surface with the workpiece, a resin excellent in sliding property and abrasion resistance, for example, PTFE (polytetrafluoroethylene), POM (acetal resin), or the like. It is preferable to form by.
[0013]
According to a third aspect of the present invention, in the cooling liquid discharging apparatus according to the first or second aspect, the discharge port discharges the cooling liquid in a direction opposite to a rotation direction of the workpiece. It is a feature.
[0014]
In the present invention, since the speed of the coolant with respect to the workpiece is a speed obtained by adding the rotation speed of the workpiece to the discharge speed from the discharge port, the coolant is poured on the workpiece at a high speed. Thereby, the cooling effect is improved.
[0015]
The coolant discharge device according to claim 4 is the coolant discharge device according to any one of claims 1 to 3, wherein the cylindrical grinding machine includes a correction device that corrects the grinding wheel. The nozzle portion is provided so as to be displaceable at a portion that does not interfere with the correction device.
[0016]
Here, as means for displaceably disposing the nozzle portion, the specific structure is not particularly limited, and the nozzle portion is displaced upward or sideways from the front of the grinding wheel in the vertical direction. Alternatively, it may be supported rotatably or slidably in the lateral direction.
[0017]
If the nozzle portion protrudes and is arranged in front of the grinding wheel, there is a possibility that the nozzle portion may become an obstacle when performing a grinding wheel correction such as dressing or truing by a correction device separately provided on the cylindrical grinding machine. Therefore, in the present invention, the nozzle portion can be displaced to a portion that does not interfere with the correction device. Thus, when performing the grindstone correction, the nozzle portion is displaced by displacing the nozzle portion, so that the grindstone correction can be performed smoothly. After the grinding wheel has been modified, the nozzle portion may be displaced to the original position in front of the grinding wheel.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a coolant discharge device for a cylindrical grinding machine according to the present invention will be described in detail with reference to the drawings.
[0019]
As shown in FIG. 1, the cylindrical grinding machine arranges a workpiece W facing a grinding wheel T, and rotates the grinding wheel T (illustrated arrow B) while rotating the workpiece W (illustrated arrow A). The grinding is performed by contacting the outer peripheral surface of the workpiece W. Further, the cylindrical grinding machine includes a grindstone table 10 for supporting the grinding wheel T, and a table (not shown) for supporting the workpiece W. , That is, the X-axis direction, which is the radial direction of the workpiece W, and the direction orthogonal to the facing direction of the grinding wheel T and the workpiece W, that is, the Z-axis direction, which is the axial direction of the workpiece W. Grinding is carried out by moving it in an appropriate manner.
[0020]
The grindstone table 10 is provided with a cover 11 that covers substantially the entirety of the grindstone T so as to expose a front portion of the grindstone T that is in contact with the workpiece W. In this example, the cover 11 is provided. At the upper part of 11, a cooling liquid discharge device 20 for pouring the cooling liquid onto the workpiece W is mounted. Here, the cooling liquid discharge device 20 is fixed to a base 21 attached to the cover 11, a substantially L-shaped support rod 22 supported by the base 21, and a tip of the support rod 22. Nozzle portion 23.
[0021]
The support rod 22 is slidably supported by the base 21 in the direction in which the grinding wheel T and the workpiece W are opposed to each other, and is further attached to the base 21 by a biasing means (not shown) such as a spring. On the other hand, it is urged toward the workpiece W (arrow C in the drawing). Therefore, in a state where the grinding wheel T is separated from the workpiece W, the support rod 22 advances with respect to the base 21 by the urging force, and the nozzle portion 23 is largely projected forward of the grinding wheel T. On the other hand, when the grindstone table 10 is moved in the X-axis direction to bring the grinding wheel T close to and contact with the workpiece W in order to perform the grinding process, as shown in FIG. As a result, the support rod 22 retreats against the urging force (arrow D in the drawing), and the nozzle portion 23 is pushed toward the grinding wheel T. In this example, a regulating means (not shown) for regulating the amount of movement of the support rod 22 toward the grinding wheel T is provided. 23 is prevented from contacting the grinding wheel T.
[0022]
Further, in the coolant discharge device 20 of this example, the base 21 is supported rotatably in the horizontal direction with respect to the cover 11, and when the base 21 is rotated, the base 21 projects forward of the grinding wheel T. The nozzle portion 23 is displaced to the side of the grinding wheel T. Accordingly, when the grinding wheel T is corrected by a correction device (not shown) separately provided on the cylindrical grinding machine, it is possible to prevent the nozzle portion 23 from being in the way. In order to displace the nozzle portion 23 so as not to be in the way when the grinding wheel T is corrected, the base portion 21 is supported rotatably in the vertical direction, and the nozzle portion 23 is displaced upward of the cover 11. Alternatively, the support rod 22 may be displaced with respect to the base 21, or the support rod 22 itself may be deformable by adopting a structure employing various link mechanisms.
[0023]
As shown in FIG. 3, the nozzle portion 23 has a width equal to or larger than the width of the grinding wheel T, and is provided with a plurality of discharge ports 25 for discharging a coolant on a surface on the grinding wheel T side. It is. Here, the nozzle portion 23 includes a nozzle body 24 having a discharge port 25 and a contact member 26 attached to a lower portion of the nozzle body 24 and abutting on the workpiece W. The contact member 26 is detachably attached to the nozzle body 24 by a method such as fixing by a set screw or fitting by uneven fitting, and when the contact member 26 comes into contact with the rotating workpiece W and is worn. Are configured so that they can be easily replaced. The contact member 26 is entirely made of a resin having excellent slidability and abrasion resistance so that it is not easily worn. The main portion of the nozzle portion 23 is not limited to this, and the main portion of the nozzle portion 23 is formed of a metal such as stainless steel. It may be coated with a fluorine-based resin having excellent properties or plated with chromium.
[0024]
The nozzle portion 23 is supplied with a cooling liquid from a supply device (not shown) including a cooling liquid tank and a pump for sending the cooling liquid. In the grinding process, as shown in FIG. The cooling liquid L is discharged from the part 23 and is poured onto the workpiece W. This cooling liquid L not only has a cooling effect for the workpiece W, but also has a lubricating effect for grinding. Here, in this example, a flow path (not shown) of the cooling liquid is formed inside the support rod 22, and a pipe (not shown) from the supply device is connected to the support rod 22. Then, the cooling liquid is supplied from the supply device to the nozzle unit 23 through the pipe and the support rod 22. The invention is not limited thereto, and the cooling liquid supply device and the nozzle portion 23 may be connected to the outside of the support rod 22 via a flexible hose. In such an embodiment, since there is no need to provide a flow path inside the support rod 22, the overall structure of the cooling liquid discharge device 20 can be simplified.
[0025]
By the way, a large amount of coolant may be discharged from the nozzle portion 23, but in this example, as shown in FIG. 4, about 5 to 50 cm ³ / min per 1 mm of contact width between the workpiece W and the grinding wheel T. Is discharged vigorously in a direction opposite to the rotation direction of the workpiece W (arrow A in the drawing), thereby cooling the workpiece W. Thereby, a large amount of cooling liquid is not atomized or evaporated, and a favorable working environment can be maintained.
[0026]
Further, since the nozzle portion 23 comes into contact with the workpiece W and is pushed toward the grinding wheel T, and the nozzle portion 23 is positioned at an appropriate portion with respect to the workpiece W, even if the coolant is small, Thus, the workpiece W can be cooled well. In this example, the coolant is immersed in the downstream portion near the grinding point, which is the contact portion between the workpiece W and the grinding wheel T, and the distance between the workpiece W and the discharge port 25 is 1 to 1. The nozzle portion 23 is positioned so as to be close to about 5 cm.
[0027]
FIG. 5 shows another example of the coolant discharge device 20a according to the present invention. In the cooling liquid discharge device 20a, the support rod 22 includes the first rod 22a supported by the base 21 and the second rod 22b supported by the first rod 22a to be vertically rotatable. The nozzle portion 23 is provided at the tip of the second rod 22b. The second rod 22b is urged toward the workpiece W by an urging means (not shown) such as a torsion spring (arrow E in the figure). The other configuration is the same as the above-described example, and the detailed description is omitted by attaching the same reference numerals.
[0028]
In this cooling liquid discharge device 20a, in order to perform grinding, the grindstone table 10 is moved in the X-axis direction to bring the grinding wheel T close to and in contact with the workpiece W, and as shown in FIG. 23 comes into contact with the workpiece W, whereby the second rod 22b rotates toward the grinding wheel T against the urging force (arrow F in the drawing), and the nozzle portion 23 is pushed toward the grinding wheel T. State. During the grinding process, the nozzle portion 23 is positioned at an appropriate position with respect to the workpiece W, and the coolant discharged from the nozzle portion 23 is poured onto an appropriate portion of the workpiece W.
[0029]
The cooling liquid discharge device according to the present invention is not limited to the above examples, and various changes and improvements can be made without departing from the spirit of the present invention. For example, instead of the cover, it may be attached to another part of the grindstone base, the one without the base part or the support rod, or the nozzle instead of the base part or the support rod by other members. The part may be supported by a grindstone stand.
【The invention's effect】
According to the grinding method according to the present invention described above, the following effects can be obtained.
[0030]
According to the first aspect of the present invention, during the grinding process, the nozzle portion is automatically positioned at an appropriate portion, so that the nozzle is always machined in response to a change in the shape of the grinding wheel and a workpiece having various shapes. Cooling liquid can be applied to an appropriate part of the object.
[0031]
According to the second aspect of the present invention, when the contact portion with the workpiece is worn, the contact member can be replaced, so that maintenance can be easily performed.
[0032]
According to the third aspect of the present invention, since the coolant is poured onto the workpiece at a high speed, the cooling effect can be improved.
[0033]
According to the fourth aspect of the present invention, when performing the grindstone correction, the nozzle portion can be displaced so as not to be in the way, so that the grindstone correction can be performed smoothly.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a coolant discharge device according to the present invention.
FIG. 2 is a side view showing a state during grinding of the cooling liquid discharge device shown in FIG. 1;
FIG. 3 is a main part front view showing a nozzle portion viewed from a grinding wheel side.
FIG. 4 is a main part side view showing a state of a nozzle part during a grinding process.
FIG. 5 is a side view showing another example of the coolant discharge device according to the present invention.
FIG. 6 is a side view showing a state during the grinding process of the coolant discharge device shown in FIG. 5;
[Explanation of symbols]
T Grinding wheel W Workpiece L Coolant 10 Grindstone 11 Cover 20 Coolant discharge device 20a Coolant discharge device 21 Base 22 Support rod 22a First rod 22b Second rod 23 Nozzle part 24 Nozzle body 25 Discharge port 26 Contact member

Claims (4)

A coolant discharge device for a cylindrical grinder, which is mounted on a grindstone base of a cylindrical grinder and bathes a coolant on a workpiece,
It has a discharge port for discharging the cooling liquid, is provided movably in the direction opposite to the grinding wheel and the workpiece, is urged toward the workpiece, and is pushed toward the grinding wheel by contact with the workpiece. A coolant discharge device for a cylindrical grinding machine, comprising a nozzle portion to be cooled. The nozzle unit includes a nozzle body having the discharge port, and a contact member that contacts the workpiece.
The cooling liquid discharge device for a cylindrical grinding machine according to claim 1, wherein the contact member is detachably attached to the nozzle body. The cooling liquid discharge device for a cylindrical grinding machine according to claim 1, wherein the discharge port discharges the cooling liquid in a direction opposite to a rotation direction of the workpiece. The said cylindrical grinder is provided with the correction device which corrects the said grinding wheel, The said nozzle part is displaceably provided in the site | part which does not interfere with the said correction device, The Claims 1-3 characterized by the above-mentioned. The coolant discharge device for a cylindrical grinding machine according to any one of the above.

Images