JPH0314286Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a work guide for a centerless grinder that performs grinding using a through-feed grinding method.

[Conventional technology]

In a centerless grinding machine that performs grinding using the continuous feed grinding method, there is a workpiece receiving plate placed between the grinding wheel and the adjustment wheel, a work guide on the entrance side that guides the workpiece between the two grinding wheels, and a workpiece guide between the two grinding wheels. It consists of a workpiece guide on the exit side of the grinding wheel, and the workpiece is ground while being fed in the axial direction between both grinding wheels, that is, through-feeding.

Inadequate adjustment of the work guide will not only reduce the grinding accuracy of the workpiece, but also pose a risk of an accident if the workpiece gets jammed, so even an experienced worker should not replace the work guide or When changing the model number of a workpiece, it takes a considerable amount of time to adjust the position of the guide surface with great care. FIG. 5 is a cross-sectional view of a conventional work guide 13, in which the guide surface 13a is heat-treated or made of a wear-resistant material, and after long-term use wears it out.
The work guide 13 itself is replaced or the guide surface is ground and corrected before use, but it goes without saying that the above-mentioned troublesome work guide adjustment must be made each time. A guide plate described in Utility Model Publication No. 59-6993 is well known. Guide plates with diamond abrasive grains or CBN abrasive grains arranged on the guide surface are expensive because the abrasive grains are expensive and it is difficult to finish the guide surface with high precision.

[Problem that the invention attempts to solve]

In view of the above-mentioned drawbacks of the prior art, the present invention provides a work guide that eliminates the need for position adjustment of the guide surface of the work guide, is inexpensive to manufacture, and has a long life.

[Means for solving problems]

The work guide according to the present invention is a work guide for a centerless grinding machine, which is characterized in that the cross section is accurately formed into a regular quadrangle or a regular octagon, and each of the four side faces 1a or the eight side faces 12a is a guide surface.
To achieve the above objectives.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. FIG. 1 shows, in cross section, one embodiment of the present invention.
The work guide 1 has an accurately square cross section and is finished to predetermined dimensions, and each of the four side surfaces 1a functions as a guide surface for guiding a workpiece.

FIG. 2 shows a state in which the work guide 1 shown in FIG. 1 is attached, and shows an example of the work guide device in a front view. 2 is a grinding wheel, 3 is an adjustment wheel, and 4 is a workpiece support plate clamped to the workpiece rest 5 by a presser 6. Work rest 5 and presser 6
Fixtures 7, 7 are attached to the upper part of the work guides 1, 1, which are pressed and fixed onto the upper surfaces of the work rest 5 and the presser 6, respectively, by tightening bolts 8, 8. When replacing the work guides 1, 1, loosen the bolts 8, 8, replace them, bring them into contact with the contact surfaces 7a, 7a, and tighten the bolts 8, 8 to attach them. The workpiece W is guided between the grindstones 2 and 3 while being supported by the receiving surface of the workpiece receiving plate 4 and the guide surface 1a of the work guide 1 on the adjusting wheel side.

When the tip of the workpiece W enters between the two grinding wheels 2 and 3 and grinding starts, the workpiece W is rotated, but even while the tip is being ground, the rest of the workpiece W is The guide surface 1a of the work guide 1 is the workpiece W
Since the guiding surface 1a is guided so as to maintain this posture, if used for a long time, even if the material is made of a material with excellent wear resistance, the guiding surface 1a will inevitably wear out.

The work guide 1 of the present invention has a square cross section and is finished to precisely specified dimensions, so even if one guide surface 1a wears out, the other guide surfaces can be replaced one after another. is possible,
In addition, if the work guide 1 is turned over and the contact position of the workpiece W is changed, the wear point 1 shown in Fig. 1 can be changed.
It can be used up to 8 times in total as shown in b. Guide 1
Even if the guide surface a is replaced with any other guide surface after wear, no guide adjustment is required.

FIG. 3 is a schematic front view showing a state in which the invented work guides 1, 1 are attached to a general work guide device 9, 9 with only the mounting portion changed. pin 1
This device adjusts the position of the work guides 1, 1 by rotating the adjusting tools 11, 11 around 0, 10, but after the initial adjustment, the adjusting tools 11, 11
If the rotation of 11 is locked, the operation is the same as that shown in Fig. 2, no further adjustment is required, and the effect is the same.

FIG. 4 is a sectional view showing the work guide 12 of another embodiment, in which the cross section is accurately finished into a regular octagon, and each of the eight side surfaces is a guide surface 12a.
becomes. The work guide 1 or 12 described above is replaced after all the guide surfaces 1a or 12a are worn out, but no adjustment is required at all, just by installing a new work guide finished to the same dimensions.

〔effect〕

The work guide of the present invention solves the troublesome problems of guide adjustment seen in the past, and the work guide can be replaced quickly and accurately, significantly improving work efficiency. The production cost is low, and since it has a plurality of (4 or 8) guide surfaces, the life of the work guide can be extended by that much, and it is excellent in economic efficiency. The invented work guide can be used by simply changing the work guide attachment part of the conventionally used guide device, and the above effects can be obtained.

[Brief explanation of the drawing]

1 and 4 are cross-sectional views of one embodiment of the present invention. 2 and 3 are front views showing a state in which the work guide of FIG. 1 is attached. FIG. 5 is a sectional view of a conventional work guide. 1, 12... Work guide, 1a, 12a...
Side (guide surface).

Claims (1)

[Scope of utility model registration request] A work guide for a centerless grinding machine that performs grinding using a through-feed grinding method, which has a cross section that is accurately formed into a regular square or a regular octagon, and whose four or eight sides are each a guide surface. Grinding machine work guide.