JP2005224918A - Centerless grinding method and centerless grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide centerless grinding technique by which a plurality of workpieces are supported by a blade and simultaneously ground by an in-feed system. <P>SOLUTION: The rotation axis center of a regulating wheel 2 is arranged in parallel to the rotation axis center of a grinding wheel 1. Inclined supporting faces 12a, 12b of the blade 3 arranged between the grinding wheel 1 and the regulating wheel 2 are upwardly inclined in the feeding direction X of the workpiece W so as to impart a thrust in the feeding direction X to the workpiece W. By this, two workpieces W are supported by the blade 3 and simultaneously ground by the in-feed system. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a centerless grinding method and a centerless grinding machine, and more particularly to a centerless grinding technique particularly suitable for centerless grinding of an outer peripheral surface of a brazed workpiece by an infeed method.

  In general, centerless grinding by the in-feed method is used for a workpiece (hereinafter referred to as a workpiece) having a shape impossible with the through-feed method, such as a step with a difference in diameter or a workpiece with a flange having a flange at an end. It is implemented to process the outer peripheral surface.

  As shown in FIG. 4A, in-feed grinding is performed by cutting the grinding wheel c to be rotated relative to the workpiece W while rotating and supporting the workpiece W by the adjustment wheel a and the blade b. As shown in FIG. 4B, the rotation axis d of the adjustment wheel a is set below the stopper e side with respect to the feeding direction X of the workpiece W, that is, the support surface of the blade b (see FIG. 4B). The thrust in the feeding direction X of the workpiece W is secured by tilting (giving a feed angle) to the lower left side in the drawing.

  By the way, in-feed grinding has poor grinding and production efficiency compared to the through-feed method in which the workpiece is ground while passing the workpiece continuously in the axial direction between the grinding wheel and the adjustment wheel. There has been a demand for mass production of this kind of work requiring feed grinding.

  As far as the present applicant knows, there is no prior art that focuses on or improves on such points.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a centerless grinding method capable of supporting a plurality of workpieces on a blade and simultaneously grinding by an infeed method. It is to provide.

  Another object of the present invention is to provide a centerless grinding machine having a structure suitable for carrying out the centerless grinding method.

  In order to achieve the above object, the centerless grinding method of the present invention is a centerless grinding method in which the outer peripheral surface of the workpiece is centerlessly cut by cutting the grinding wheel driven to rotate relative to the workpiece while rotating and supporting the workpiece by the adjusting wheel and the blade. In this grinding method, the rotational axis of the adjusting wheel is disposed in parallel to the rotational axis of the grinding wheel, and the support surface of the blade disposed between the grinding wheel and the adjusting wheel is a workpiece. It is characterized in that the thrust in the feeding direction is applied to the workpiece by inclining upward with respect to the feeding direction.

  Here, the workpiece feeding direction means the direction in which the workpiece is fed into the processing portion of the grinding wheel, and more specifically, the grinding wheel in which the workpiece is fed into the processing portion of the grinding wheel. (Hereinafter, the same applies throughout this specification).

  As a preferred embodiment, at least both side portions of the support surface of the blade are inclined upward with respect to the feeding direction of the workpiece, and a plurality of workpieces placed on the inclined support surface are simultaneously infeed. Grind.

  In this case, the profiles of the outer peripheral surfaces of the grinding wheel and the adjustment wheel are such that the grinding wheel and the adjustment wheel face each other at an equal distance with respect to the entire axial length of the work supported by the inclined support surface of the blade. More specifically, the outer peripheral surfaces of these grinding wheels and adjustment wheels are formed so as to be in line contact over the entire length in the axial direction with respect to the finished shape of the outer peripheral surface of the work supported by the inclined support surface of the blade. The

  Further, as a method for regulating the axial position of the blade, (a) a stopper member for defining the axial position of the work supported by the inclined support surface is placed on a support surface adjacent to the inclined support surface of the blade. And (b) if the two workpieces supported by the inclined support surfaces on both sides of the blade have a shape having a flange at the rear end, the flanges of these workpieces are respectively engaged with the front and rear end surfaces of the blade. It is possible to suitably employ a method such as a configuration that stops and functions as a stopper that defines the position of the workpiece itself in the axial direction.

  More preferably, the workpiece flying prevention fluid is jetted and supplied to the workpiece processing portion supported by the inclined support surface of the blade, and the spray pressure of the fluid is applied to the rear end surface of the workpiece. Is desirable.

  A centerless grinding machine according to the present invention is suitable for carrying out the centerless grinding method, wherein the rotational axis of the adjusting wheel is arranged in parallel to the rotational axis of the grinding wheel, and these grinding wheels At least both sides of the support surface of the blade disposed between the control wheel and the adjustment wheel are inclined support surfaces inclined upward with respect to the workpiece feeding direction, and are supported by the inclined support surfaces of these blades. Further, a thrust in the feeding direction is applied to each of the plurality of workpieces, and a plurality of workpieces are simultaneously in-feed grounded by the grinding wheel.

  In this case, as a preferred embodiment, the grinding wheel and the adjustment wheel are arranged such that the grinding wheel and the adjustment wheel face each other at an equal distance with respect to the total axial length of the work supported by the inclined support surface of the blade. More specifically, the outer peripheral surface of the grinding wheel and the adjusting wheel are lined over the entire length in the axial direction with respect to the finished shape of the outer peripheral surface of the work supported by the inclined support surface of the blade. Formed to contact.

  Further, a dressing device for correcting the outer peripheral surface shapes of the grinding wheel and the adjusting wheel is provided, and the dressing device is configured to be driven and controlled according to a dress program for recovering and maintaining the profile of the outer peripheral surface of the grinding wheel and the adjusting wheel. The In this case, it is desirable that the dresser cutting structure of the dressing device is a one-way cutting.

  Further, as a means for regulating the axial position of the blade, (a) a stopper member for defining the axial position of the work supported by the inclined support surface is placed on a support surface adjacent to the inclined support surface of the blade. And (b) when the two workpieces supported by the inclined support surfaces on both sides of the blade have a shape having a flange at the rear end, the flanges of these workpieces are respectively A configuration such as a configuration that functions as a stopper that locks on the front and rear end surfaces of the blade and defines the position in the axial direction of the workpiece itself is suitably employed.

  Further, the apparatus includes a fluid supply device that supplies a workpiece splash prevention fluid to a workpiece processing portion supported by the inclined support surface of the blade, and the spray nozzle of the fluid supply device prevents the workpiece from jumping to the rear end surface of the workpiece. It is desirable to arrange and arrange so that the injection pressure of the working fluid is applied.

  The centerless grinding technique of the present invention was born as a result of various test studies by the present inventors. In other words, the present inventor aims to improve the grinding efficiency and production efficiency, which has been a conventional concern in infeed grinding, in order to realize mass production of this kind of work requiring infeed grinding. However, none of the results reached a drastic solution.

  For example, prior to the completion of the present invention, aiming to realize a method of grinding two workpieces simultaneously at the front and rear in the axial direction of a grinding wheel while maintaining the basic configuration in the conventional infeed method. I tried. However, in order to secure the thrust in the workpiece feeding direction, the adjustment wheel is provided with a feed angle, so when trying to adopt the above grinding method, Although the thrust in the feeding direction can be secured, the thrust in the direction opposite to the feeding direction is generated for the other workpiece, that is, the rear part. As a result, two pieces are ground simultaneously in the front and rear parts (two-way feeding). Grinding) was not realized.

  After such trial and error by the inventor, the present invention has been completed.

  That is, according to the present invention, the rotation axis of the adjustment wheel is arranged in parallel to the rotation axis of the grinding wheel, and the support surface of the blade arranged between the grinding wheel and the adjustment wheel is fed to the workpiece. Since the thrust in the feeding direction is applied to the workpiece by inclining upward with respect to the insertion direction, a plurality of workpieces are provided on the blade by providing a plurality of such inclined support surfaces on the blade. It is possible to grind by the in-feed method at the same time as supporting the individual. In such simultaneous grinding of a plurality or multiple pieces, the grinding cycle time per workpiece becomes 1 / N (N: the number of workpieces ground), so that the grinding efficiency and production efficiency can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  A centerless grinding machine according to the present invention is shown in FIGS. 1 to 3, and specifically, this grinding machine uses a plurality of or a plurality of shaft portions Wa of a wrinkled work W by an in-feed method. The centerless grinding is performed, and in the illustrated embodiment, two workpieces W and W are ground simultaneously, and the grinding wheel 1, the adjustment wheel 2, the blade 3, and the dressing device 4 are configured as main parts. .

  The grinding wheel 1 grinds the outer peripheral surfaces of the shaft portions Wa and Wa of the two workpieces W and W, and the pair of grinding wheel surfaces (outer peripheral surfaces) 1a and 1b are the shaft portions Wa and Wa of the workpiece W. And a profile corresponding to the final finished shape of the outer peripheral surface of the shaft portions Wa and Wa. The specific shape structure of the grinding wheel 1 is not particularly limited as long as it includes the pair of grinding wheel surfaces 1a and 1b. In the illustrated embodiment, the grinding wheel surfaces 1a and 1b are provided at both front and rear portions of the grinding wheel 1, respectively. Although provided, a grinding wheel (not shown) provided with the grinding wheel surfaces 1a and 1b on the outer peripheral surface may be attached and fixed to the same grinding wheel shaft 10 described later. A specific profile of the grinding wheel surfaces 1a and 1b of the grinding wheel 1 will be described later.

  The grinding wheel 1 has a conventionally known general basic structure. That is, the grinding wheel 1 is detachably mounted and fixed to the grinding wheel axle 10, and is rotatably supported on a grinding wheel platform (not shown) on which the grinding wheel axle 10 is fixedly mounted, and a power transmission belt. And a drive source such as a drive motor through power transmission means such as a gear mechanism.

  The adjusting wheel 2 rotatably supports the outer peripheral surfaces of the shaft portions Wa and Wa of the two workpieces W and W. The pair of rotation support surfaces (outer peripheral surfaces) 2a and 2b are the shaft portions Wa and Wa of the workpiece W. And a profile corresponding to the final finished shape of the outer peripheral surface of the shaft portions Wa and Wa. The specific shape structure of the adjustment wheel 2 is not particularly limited as long as it includes the pair of rotation support surfaces 2a and 2b, as in the grinding wheel 1, and in the illustrated embodiment, the front and rear side portions of the adjustment wheel 2 are provided. The rotation support surfaces 2a and 2b are provided, respectively. In addition, an adjustment wheel (not shown) provided with the rotation support surfaces 2a and 2b on the outer peripheral surface may be attached and fixed to the same adjustment axle 11 described later. The specific profiles of the rotation support surfaces 2a and 2b of the adjustment wheel 2 will be described later in the same manner as the grinding wheel surfaces 1a and 1b of the grinding wheel 1.

  The adjusting wheel 2 has a conventionally known general basic structure. That is, the adjustment wheel 2 is detachably attached and fixed to the adjustment axle 11, and the adjustment axle 11 is rotatably supported on the adjustment carriage (not shown), and power transmission means such as a power transmission belt and a gear mechanism. Via a drive source such as a drive motor.

  Further, as described later, in order to enable simultaneous grinding of the two workpieces W, W, the rotation axis of the adjustment wheel 2, that is, the adjustment axle 11 is parallel to the rotation axis of the grinding wheel 1, that is, the grinding wheel axle 10. Has been placed.

  The blade 3 supports the shaft portion Wa of the workpiece W together with the adjusting wheel 2, and is installed on the adjusting wheel base in the same manner as the adjusting wheel 2, and has an axial center between the grinding wheel 1 and the adjusting wheel 2. The upper end surface 12 is a support surface inclined downward on the adjustment wheel side.

  Of the support surface 12 of the blade 3, both front and rear end portions (both side portions) 12a, 12b are respectively upward with respect to the workpiece feeding direction X in the side view, as shown in FIG. The inclined support surfaces are inclined, and the shaft portions Wa and Wa of the two workpieces W and W are supported by the both inclined support surfaces 12a and 12b. In this case, as shown in FIGS. 1A and 1B, the two workpieces W and W are inclined support surfaces 12a and 12b so that the flanges Wb and Wb face the outside of the machine, that is, the front and rear sides. Mounted and supported on.

  In the illustrated embodiment, the workpiece feeding direction X is set in the horizontal direction parallel to the axis of the grinding wheel 1, that is, the grinding wheel axle 10 (and the adjustment axle 11), and the inclined support surface 12 a of the blade 3, As shown in FIG. 1B, 12b is inclined upward by a predetermined angle θ with respect to the feeding direction X of the workpiece W in the horizontal direction.

  The workpieces W and W supported on the front and rear inclined support surfaces 12a and 12b of the blade 3 are in-feed by the grinding wheel 1 that is rotationally driven while being rotatably supported by the adjusting wheel 2 and the blade 3 that are rotationally driven. When centerless grinding is performed, thrust in the feeding direction X is given by the tilting action of the tilted support surfaces 12a and 12b.

  In relation to this, it is necessary to regulate the position of the workpiece W in the axial direction at the processing portion of the grinding wheel 1 (the portion corresponding to the grinding wheel surfaces 1a and 1b). In the illustrated embodiment, since the workpieces W and W have flanges Wb and Wb, the flanges Wb and Wb are respectively connected to the front and rear end surfaces 3a and 3b of the blade 3, as shown in FIG. It is set as the structure which latches to 3b and functions as a stopper which prescribes | regulates the axial direction position of the workpiece | work W and W itself.

As shown in phantom lines in FIGS. 1A and 1B, a support surface adjacent to both inclined support surfaces 12a and 12b of the blade 3, that is, a horizontal support surface 12c between both inclined support surfaces 12a and 12b. In addition, a cylindrical stopper member 15 may be placed. That is, the front and rear end faces 15a and 15b of the stopper member 15 abut and lock the front end faces Wc and Wc of the workpieces W and W, respectively, to define the axial positions of the workpieces W and W.
This stopper configuration is particularly effective when the workpieces W and W do not have the flange portions Wb and Wb.

  Further, the grinding wheel surfaces 1a and 1b of the grinding wheel 1 and the adjusting wheel 2 are related to the workpiece W being rotated and supported while being tilted in the vertical direction with respect to the grinding wheel 1 and the adjusting wheel 2. The specific profiles of the rotary support surfaces 2a and 2b are configured as described below, and the shape correction of the outer peripheral surfaces 1a, 1b and 2a, 2b by the dressing device 4 is performed as follows. Done to maintain recovery.

(1) First, since the workpiece W is tilted and ground, the outer diameter dimension of the shaft portion Wa of the workpiece W differs depending on the contact position with the outer peripheral surfaces of the grinding wheel 1 and the adjustment wheel 2. Specifically, as shown in FIG. 2 (a), the tip side portion of the shaft portion Wa of the workpiece W becomes thicker because of contact at the points a and c (large diameter), and the rear end on the opposite side. The side part (that is, the outer part of the machine) is thin (small-diameter dimension) because it contacts at points b and d.

  Therefore, the outer peripheral surfaces 1a, 1b and 2a, 2b of the grinding wheel 1 and the adjustment wheel 2 face each other at equal distances with respect to the axial total length of the workpieces W, W supported by the inclined support surfaces 12a, 12b of the blade 3. Then, the profiles of the outer peripheral surfaces 1a, 1b and 2a, 2b are formed so as to come into contact with each other. That is, the grinding wheel surfaces 1a and 1b of the grinding wheel 1 and the rotation support surfaces 2a and 2b of the adjusting wheel 2 are connected to the point a and the point a where the tip side portion of the shaft portion Wa of the workpiece W comes into contact as shown in FIG. It is formed to be thick at the point c side (large diameter dimension) and thin at the point b and point d side where the rear end side portion of the shaft portion Wa of the workpiece W contacts (small diameter dimension).

(2) Further, when the workpiece W is tilted, the outer peripheral surfaces of the grinding wheel 1 and the adjustment wheel 2 are medium and high as shown in FIG. 3A when viewed from a direction perpendicular to the axis of the shaft portion Wa of the workpiece W. A convex arc-shaped cross-sectional contour is drawn, and as a result, the contact of the workpiece W with the shaft portion Wa becomes a point contact (point p portion).

  Therefore, the profiles of the outer peripheral surfaces 1a, 1b and 2a, 2b of the grinding wheel 1 and the adjusting wheel 2 are the work W in which these outer peripheral surfaces 1a, 1b and 2a, 2b are supported by the inclined support surfaces 12a, 12b of the blade 3, It is formed so as to be in line contact with the finished shape of the outer peripheral surface of the shaft portion Wa of W over the entire length in the axial direction. That is, the grinding wheel surfaces 1a and 1b of the grinding wheel 1 and the rotation support surfaces 2a and 2b of the adjustment wheel 2 are viewed from a direction perpendicular to the rotation axes (axis centers of the shafts 10 and 11) of the grinding wheel 1 and the adjustment wheel 2. In this case, as shown in FIG. 3 (b), it is formed so as to draw a medium-low concave arc-shaped cross-sectional contour, thereby obtaining a linear cross-sectional contour as shown by an imaginary line in FIG. 3 (a).

  2 and 3 referred to here are shown by enlarging the radial dimension compared to the actual shape dimension in order to facilitate understanding of the specific technical contents according to the present invention.

  The dressing device 4 corrects the shapes of the outer peripheral surfaces 1a, 1b and 2a, 2b of the grinding wheel 1 and the adjusting wheel 2, and specifically, only for correcting the shapes of the outer peripheral surfaces 1a, 1b and 2a, 2b. As a dresser, a total of two dressers 4a and 4b are provided, one for the grinding wheel 1 side and one for the adjustment wheel 2 side. The dressers 4a and 4b in the illustrated embodiment are in the form of a diamond dresser whose tip is made of diamond.

  These dressers 4a and 4b are driven and controlled to recover and maintain the profiles of the outer peripheral surfaces 1a, 1b and 2a, 2b of the grinding wheel 1 and the adjusting wheel 2 according to a dress program programmed in a control device (not shown). It is set as the structure. Specifically, the dressers 4a and 4b are controlled so as to move with a movement trajectory as shown in FIG. 3B with respect to the grinding wheel 1 and the adjustment wheel 2 that are rotationally driven, and are adjusted with the grinding wheel 1. The contour shapes of the outer peripheral surfaces 1a, 1b and 2a, 2b of the vehicle 2 are corrected, and the predetermined profile described above is recovered and maintained.

  In this case, the cutting structure of the dressers 4a and 4b is one-way cutting so as not to be affected by backlash. The dressers 4a and 4b are in the form of a rotary diamond dresser in which the dressing surface of the cylindrical outer peripheral surface is bonded with a diamond abrasive instead of the diamond dresser as in the illustrated embodiment. May be.

  Further, as shown in FIG. 1, a fluid supply device 15 is provided in the vicinity of the blade 3. This fluid supply device 15 is for preventing the workpieces W and W from jumping out from the blade 3 of the processing portion due to the influence of the coolant for grinding and the like. Two spray nozzles 16 and 17 are provided for supplying the workpiece A with a fluid A for preventing the workpiece from flying out. These injection nozzles 16 and 17 are configured and arranged so that the injection pressure of the fluid A is applied to the rear end faces Wd and Wd of the workpieces W and W. The workpiece pop-out preventing fluid A is not particularly limited as long as it meets the intended purpose. In the illustrated embodiment, a grinding coolant is used.

  Specifically, the rear end surfaces Wd and Wd of the workpieces W and W are provided in the vicinity of both front and rear ends of the blade 3, and the injection ports 16 a and 17 a are supported by the inclined support surfaces 12 a and 12 b of the blade 3. The workpieces W, W are directed to the rear end faces Wd, Wd. Then, the fluid A ejected from the ejection nozzles 16 and 17 is applied to the workpieces W and W processed parts after hitting the rear end surfaces Wd and Wd of the workpieces W and W, whereby the rear end surfaces Wd and W of the workpieces W and W are obtained. The injection pressure of the fluid A is applied to Wd. As a result, the workpieces W and W are effectively prevented from jumping out of the workpiece processing portion due to the influence of the grinding coolant or the like.

  Thus, in the centerless grinding machine configured as described above, as shown in FIGS. 1A and 1B, two workpieces W are placed on the inclined support surfaces 12a and 12b at the front and rear end portions of the blade 3. In the state where the shaft portions Wa, Wa of W are placed and supported with the flange portions Wb, Wb facing the outside (front-rear side) of the machine, the workpieces W, W are transferred by the fluid supply device 15 as described above. While the fluid A is supplied as described above, the grinding wheel 1 that is rotationally driven with respect to the shaft portions Wa and Wa while being forcibly supported by the adjusting wheel 2 and the blade 3 is cut relatively, and the shaft portions Wa and The outer peripheral surface of Wa is centerless ground by the in-feed method.

  Specifically, the adjustment axle (rotation axis) 11 of the adjustment wheel 2 is disposed in parallel to the grinding wheel axle (rotation axis) 10 of the grinding wheel 1, and the inclined support surfaces 12 a and 12 b of the blade 3 are arranged. Is inclined upward (inclination angle θ) with respect to the feeding direction X of the workpieces W and W, the workpieces W and W are given thrust in the feeding direction X, and the workpiece W is fed. While being fed in the direction X, the flanges Wb, Wb of the workpieces W, W are respectively engaged with the front and rear end surfaces 3a, 3b of the blade 3, so that the axial positions of the workpieces W, W themselves are defined. The shaft portions Wa and Wa are ground by the grinding wheel 1 and finished to a final cylindrical shape.

  Further, according to the properties of the outer peripheral surfaces 1a, 1b and 2a, 2b of the grinding wheel 1 and the adjustment wheel 2, the outer peripheral surfaces 1a, Applied to 1b and 2a, 2b, its shape is modified, and the predetermined profile mentioned above is restored and maintained.

  By being configured as described above, that is, the rotational axis of the adjustment wheel 2 is disposed in parallel to the rotational axis of the grinding wheel 1 and is disposed between the grinding wheel 1 and the adjustment wheel 2. Since the inclined support surfaces 12a and 12b of the blade 3 are inclined upward with respect to the feeding direction X of the workpiece W, the thrust in the feeding direction X is applied to the workpiece W. By providing two surfaces 12a and 12b on the blade 3, it is possible to support two workpieces W on the blade 3 and simultaneously grind by the infeed method.

  The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited thereto, and various design changes can be made within the scope.

  For example, in the illustrated embodiment, inclined support surfaces 12a and 12b are provided at both side end portions of the blade 3, and two workpieces W and W are simultaneously ground. In addition to the inclined support surfaces 12a and 12b, a similar inclined support surface is appropriately added to the part, so that a plurality or a plurality of workpieces W, W,. Centerless grinding is possible with the in-feed method. In such simultaneous grinding of a plurality or many, the grinding cycle time per workpiece becomes 1 / N (N: the number of workpieces ground), and the grinding efficiency and production efficiency can be improved.

The schematic structure of the principal part of the infeed system centerless grinding machine which is one Embodiment of this invention is shown, Fig.1 (a) is a top view, FIG.1 (b) is a side view. FIG. 2A is a schematic diagram for explaining the configuration of the profile of the grinding wheel and the adjustment wheel in the centerless grinding machine, and FIG. 2A shows the outer diameter of the grinding wheel and the adjustment wheel with the shaft outer diameter of the workpiece supported to be inclined. FIG. 2 (b) shows that the outer peripheral surfaces of the grinding wheel and the adjustment wheel are equidistant with respect to the total axial length of the shaft portion of the workpiece supported to be inclined. It is a figure which shows the profile of these outer peripheral surfaces for opposing and contacting. FIG. 3A is a schematic diagram for explaining the configuration of the profile of the grinding wheel and the adjustment wheel, and FIG. 3A shows the grinding wheel and the grinding wheel as viewed from the direction perpendicular to the axis of the shaft portion of the workpiece supported to be inclined. FIG. 3B is a diagram showing a cross-sectional outline of the outer peripheral surface of the adjustment wheel, and FIG. It is a figure which shows the cross-sectional outline at the time of seeing from the direction perpendicular | vertical to the rotating shaft line of these grinding wheels and adjustment wheels of these outer peripheral surfaces for a line contact over. FIG. 4A is a plan view and FIG. 4B is a perspective view showing a relationship between an adjustment wheel and a workpiece, showing a schematic configuration of a main part of a conventional general in-feed type centerless grinding machine.

Explanation of symbols

W Work Wa Shaft shaft Wb Work flange Wc Work tip Wd Work rear face θ Feed angle (tilt angle)
A Fluid (work fluid prevention fluid)
1 Grinding wheel 1a, 1b Grinding wheel surface (outer circumferential surface) of grinding wheel
2 Adjustment wheel 2a, 2b Rotation support surface (outer peripheral surface) of adjustment wheel
3 Blade 3a, 3b End face 4 of blade 4 Dressing device 4a, 4b Dresser 10 of dressing device Grinding wheel axle (rotating axis of grinding wheel)
11 Adjusting axle (rotating axis of adjusting car)
12 Blade support surfaces 12a and 12b Blade support surfaces 15 Fluid supply devices 16 and 17 Injection nozzle

Claims (8)

A method in which a grinding wheel that is rotationally driven is cut relative to the workpiece while the workpiece is rotated and supported by an adjustment wheel and a blade, and the outer peripheral surface of the workpiece is centerless ground by infeed,
The rotational axis of the adjusting wheel is disposed in parallel to the rotational axis of the grinding wheel, and the support surface of the blade disposed between the grinding wheel and the adjusting wheel is arranged with respect to the workpiece feeding direction. A centerless grinding method characterized in that a thrust in the feeding direction is applied to the workpiece by inclining upward. Inclining at least both sides of the support surface of the blade upward with respect to the feeding direction of the workpiece, and simultaneously infeed grinding a plurality of workpieces placed on the inclined support surface The centerless grinding method according to claim 1, wherein: The profiles of the outer peripheral surfaces of the grinding wheel and the adjustment wheel are formed so that the grinding wheel and the adjustment wheel face each other at an equal distance with respect to the axial total length of the workpiece supported on the inclined support surface of the blade. The centerless grinding method according to claim 2, wherein the centerless grinding method is provided. A fluid for preventing a workpiece from being ejected is supplied to a machining portion of the workpiece supported by the inclined support surface of the blade, and the spray pressure of the fluid is applied to the rear end surface of the workpiece. The centerless grinding method according to claim 2 or 3. A centerless grinding machine that cuts a grinding wheel driven to rotate relative to the workpiece while centering and grinding the outer peripheral surface of the workpiece with infeed while rotating and supporting the workpiece with an adjustment wheel and a blade,
A rotating shaft center of the adjusting wheel is disposed in parallel to a rotating shaft center of the grinding wheel, and at least both side portions of the support surface of the blade disposed between the grinding wheel and the adjusting wheel are workpieces. The inclined support surface is inclined upward with respect to the feeding direction.
A plurality of workpieces supported on the inclined support surfaces of these blades are each given thrust in the feeding direction, and a plurality of workpieces are simultaneously in-feed grounded by the grinding wheel. Centerless grinding machine. Profiles of outer peripheral surfaces of the grinding wheel and the adjustment wheel are formed so that the grinding wheel and the adjustment wheel face each other at an equal distance with respect to the entire axial length of the workpiece supported on the inclined support surface of the blade. The centerless grinding machine according to claim 5, wherein the centerless grinding machine is provided. A dressing device for correcting the outer peripheral surface shape of the grinding wheel and the adjustment wheel;
The centerless grinding machine according to claim 6, wherein the dressing device is configured to be driven and controlled in accordance with a dress program for recovering and maintaining the profiles of the outer peripheral surfaces of the grinding wheel and the adjusting wheel. A fluid supply device for supplying a workpiece splash prevention fluid to a machining portion of the workpiece supported by the inclined support surface of the blade;
8. The spray nozzle of the fluid supply device is configured and arranged so that a spray pressure of a splash preventing fluid is applied to a rear end surface of the workpiece. Centerless grinding machine.

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