JPH04122573A - Grinding wheel dressing method and device therefor - Google Patents

Abstract

PURPOSE:To suppress the generation of a chatter mark by providing a tip for dressing a grinding wheel, and an oscillating device for providing this tip with oscillating motion. CONSTITUTION:The dressing of a grinding wheel 1 is performed while oscillating a tip 5 by an oscillating device 7. In this case, the dressing quantity is delicately changed according to the oscillating motion of the tip 5. According to this, a change is provided to the modulation of the work face of the grinding wheel 1, so that the work face of the grinding wheel is formed into wavy shape of minute amplitude and minute pitch. The trough part of the wavy part thereby comes to have the equal function to the porous part of the grinding wheel 1 so as to function as a pocket for falling abrasive grain and ground chips to escape into and also to play the role of carrying grinding liquid into a grinding point.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a dressing method and device for a grinding wheel used in a grinding machine or the like.

(Prior art) In a grinding wheel such as a grinding wheel used in a grinding machine, etc.,
If the sharpness of the grinding wheel deteriorates due to clogging and soaking caused by grinding work, the surface of the grinding wheel, that is, the working surface, should be cleaned with a dressing tip, generally called a dresser, made of a diamond tool or the like. remove,
The so-called dressing of the grindstone is performed.

Conventionally, dressing of a grinding wheel is generally performed by rotating the grinding wheel and applying a predetermined dressing depth to the dresser on the rotating grinding wheel, thereby dressing the outer circumferential surface of the grinding wheel, which is the working surface of the grinding wheel. This is done by uniformly removing the entire circumference.

(Problems to be Solved by the Invention) In general, in a grinding wheel with a porous structure in which fine abrasive grains are bonded to each other by a binder, the porous portion between the abrasive grains is removed from the abrasive grains or grinding chips. It plays the role of a pocket that receives the grinding fluid and a role of transporting the grinding fluid to the grinding work point.For better and more efficient grinding, the above-mentioned actions are performed more effectively. It is hoped that

In addition, when grinding is performed using a grinding wheel, there is a problem in that the vibration of the workpiece against the grinding wheel causes chatter patterns, or chatter marks, to appear on the finished surface of the workpiece. This will reduce the value of the processed product. If the pitch of the chatter marks generated on the grinding surface overlaps with the feed rate, the grinding wheel will trace the chatter marks generated by one revolution of the grinding workpiece and the grinding wheel again, and grind this. Therefore, the chatter marks become even more noticeable, and the value of the ground workpiece is significantly reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel method for dressing a grinding wheel that allows proper grinding to be performed efficiently and prevents chatter marks from easily occurring, and a dressing device used to carry out this dressing method.

[Structure of the Invention] (Means for Solving the Problems) According to the present invention, the above-mentioned object is to swing a tip dressing a grinding wheel to change the modulation of the working surface of the grinding wheel. This is achieved by a dressing method for a grinding wheel characterized by a dressing method for a grinding wheel, and a dressing device for a grinding wheel characterized by comprising a tip for dressing the grinding wheel, and a rocking device for imparting a rocking motion to the tip.

(Function) In the method and device for dressing a grinding wheel according to the present invention, dressing of the grinding wheel is performed while the chips are in oscillating motion, so that the amount of dressing is adjusted according to the oscillating motion of the chips. This causes a slight change in the modulation of the working surface of the grinding wheel.
The working surface of the grinding wheel takes on a wavy shape with the required minute amplitude and minute pitch. As a result, the undulating troughs have the same function as the porous part of a grinding wheel, acting as pockets where dropped abrasive grains and grinding chips can escape, and also transporting grinding fluid to the grinding point. begins to occur.

As mentioned above, the wavy modulation applied to the working surface of the grinding wheel can be diagonal or irregular when viewed in the grinding feed direction of the grinding wheel. Even if the chatter mark and the feed rate overlap, the grinding wheel will not trace the chatter mark that was created by one rotation of the grinding wheel on the workpiece, and this will prevent the occurrence and growth of the chatter mark. Becomes suppressed.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows one embodiment of a dressing device for a grinding wheel according to the present invention. In FIG. 1, reference numeral 1 indicates a grinding wheel as a grinding wheel, and the grinding wheel 1 is supported by a grinding wheel shaft 3 and rotated around its own central axis.

The outer circumferential surface of the grinding wheel 1, which is the working surface, is selectively dressed with a dressing tip 5.

The dressing tip 5 is attached to and supported by a swing output member 9 of a swing device 7 attached to a body frame or a work table (not shown).

The oscillating device 7 is constituted by a well-known magnetic type vibration generating device, and vibrates with a predetermined amplitude and a predetermined frequency in the left-right direction of the vibration output member 9 as seen in FIG. 1, that is, in the radial direction of the grinding wheel 1. It is designed to give a rocking motion. The oscillation amplitude and frequency of the oscillation device 9 can be individually and arbitrarily variably set by operating knobs 13 and 15 in the operation unit 11 connected to the oscillation device 7, and the maximum oscillation of this The dynamic amplitude may be on the order of 5 ppm/p, and the frequency may be on the order of 2-12000 Hz.

As clearly shown in FIG. 2, the dressing tip 5 is arranged so as to be inclined at a predetermined inclination angle θ with respect to the rotational axis of the grinding wheel 1.

According to the above-described configuration, when dressing the grinding wheel 1, the swinging device 7 is driven to swing the dressing tip 5 while the dressing tip 5 is given a predetermined dressing depth to the grinding wheel 1. When the dynamic output member 9 performs a swinging motion, the drain/nosing tip 5 swings in the radial direction of the grinding wheel 1 with an amplitude and frequency determined by the output state of the swinging device 7. Correspondingly, the amount of dressing of the grinding wheel 1 by the dressing tip 5 changes slightly in the radial direction of the grinding wheel 1, and the shape of the outer peripheral surface, which is the working surface of the grinding wheel 1, is defined according to this amount of dressing. Therefore, this outer circumferential surface produces minute waves in response to the rocking of the tracing tip 5, and the modulation of this outer circumferential surface is varied.

Because the shape of the outer circumferential surface of the grinding wheel 1 becomes a slightly wavy modulation due to the above-described dressing, a pocket portion is actively provided on the outer circumferential surface of the grinding wheel 1 to catch the grinding wheel or grinding chips that have fallen off. At the same time, the transportability of the grinding fluid to the grinding point is improved, and as a result, good grinding work can be performed efficiently.

As mentioned above, when a predetermined inclination angle θ is given to the tracing tip 5, the modulation of the wavy shape on the outer peripheral surface of the grinding wheel 1 is caused by the third wave-like modulation on the outer peripheral surface of the grinding wheel 1. As schematically shown in FIG. 4, the ground surface obtained by traverse grinding is oblique, and as shown schematically in FIG. The chatter mark produced by one rotation of the grinder and the chatter mark produced by re-grinding are different in phase from each other, so that the occurrence of chatter marks is suppressed.

The inclination angle θ of the dressing tip 5 may be arbitrarily adjusted, and the inclination angle θ is 1″ to 45″.
It may be of a certain degree.

Suppression of chatter marks that occur on the ground workpiece can be achieved by making the modulation of the outer circumferential surface of the grinding wheel oblique as described above, but in addition to this, it is also possible to suppress chatter marks that occur on the dressing tip 5 during dressing. This is also achieved by varying the amplitude and frequency of the applied rocking motion, thereby making the shape of the modulation non-uniform in the traversal grinding direction of the grinding wheel.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Effects of the Invention] As can be understood from the description of the embodiments as described above, in the method and device for dressing a grinding wheel according to the present invention, dressing of the grinding wheel is performed while the tip is in oscillating motion. As a result, the amount of dressing changes slightly in response to the rocking motion of the chip, and the modulation of the working surface of the grinding wheel changes accordingly, so that the working surface of the grinding wheel adjusts to the required minute amplitude and It has a wavy shape with a minute pitch. As a result, the undulating troughs have the same function as the porous parts of a grinding wheel, acting as pockets where dropped abrasive grains and grinding chips can escape, and also transporting the grinding fluid to the grinding point. As a result, good grinding can be performed efficiently.

In addition, the wavy modulation applied to the working surface of the grinding wheel is set diagonally or irregularly when viewed in the grinding feed direction of the grinding wheel, even if the chatter mark and the feed amount overlap. Also, the grinding wheel will not scratch the chatter marks created by one rotation of the grinding wheel on the workpiece, and this will suppress the occurrence of chatter marks. A decline in value is avoided.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a dressing device for a grinding wheel according to the present invention, FIG. 2 is a view taken in the direction of the ■ arrow in FIG. 1, and FIG. FIG. 4 is a front view of a grinding wheel for schematically showing the modulation of the grinding wheel, and is an explanatory diagram schematically showing the surface of a ground workpiece during grinding by a grinding wheel dressed according to the dressing method according to the present invention. 1... Grinding wheel 5... Dressing tip 7... Rocking device

Claims (2)

[Claims] (1) Swing the tip dressing the grinding wheel,
A method for dressing a grinding wheel characterized by changing the modulation of the working surface of the grinding wheel. (2) A dressing device for a grinding wheel, comprising a tip for dressing the grinding wheel, and a rocking device for giving a rocking motion to the chip.