JP2556708B2 - Belt sander machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a belt sander machine for grinding and polishing a metal plate or the like with an endless sanding belt, and a belt sander machine provided with a dresser for shaping the polishing surface of the belt. Regarding

<Prior Art> The structure of an example of this type of belt sander will be described with reference to FIG.

Inside the material feeding frame 2 arranged on one side of the lower frame 1, there is a billy roller 3 in the center thereof, and before and after the billy roller 3, a breaker roller 4 provided with a rubber coating,
5 are arranged respectively. Further, guide rollers 6 and 7 are supported at the entrance and the exit of the material feeding frame 2, and reach the lower edge of the breaker roller 4 from above the guide roller 6 and bypass the upper edge of the billy roller 3 to breaker roller 5. A material feeding passage 8 extending to the lower edge and the guide roller 7 is formed.

A vertical frame 9 is erected on the other side of the lower frame 1, and a sanding frame 10 is provided on the vertical frame 9.
It is provided on the material feeding frame 2. On the upper part of the sanding frame 10, a tension roller 11 that also serves as a steering is provided so as to be able to move up and down, and on the lower part of the frame 10, a contact roller 12 is provided with the billy roller 3 and the material feeding passage 8 disposed. A belt guide mechanism is configured by 11,12. Then, the endless sanding belt 13 is wound around the rollers 11 and 12.

A workpiece w made of, for example, a long thin metal plate is continuously fed to the material feeding passage 8 from a guide roller 6, and is pressed against the polishing surface f of the endless sanding belt 13 between the billy roller 3 and the contact roller 12. Then, the upper surface of the processed material w is polished.

<Problems to be Solved by the Invention> By the way, when the endless sanding belt 13 travels between the billy roller 3 and the contact roller 12 to grind the workpiece w, the width dimension of the endless sanding belt 13 is constant. Therefore, as shown in FIG. 6, when the width of the processed material w is narrower than the width of the endless sanding belt 13, both ends x of the belt 13 directly contact the billy roller 3, Although the billy roller 3 is coated with a ceramic to have abrasion resistance, the ceramic coating layer is scraped off by continuous polishing.
As a result, there is a drawback that the billy roller 3 needs to be frequently replaced.

In this case, the endless sanding belt 13 may have a narrow width, but since the belt 13 has a high wear rate and is frequently exchanged, a belt of a different type corresponding to the width of the processed material w is used. It is difficult to maintain a large number in terms of maintenance management. In addition, the belt sander machine controls the steering operation of the tension roller 11 to produce an endless sanding belt.
A detector for detecting the edge position of the endless sanding belt 13 is arranged at an appropriate position in order to keep the width position of the endless sanding belt 13 at an appropriate position. It is not easy to move the position of.

Therefore, it is hard to say that preparing the endless sanding belts 13 having different widths in advance is an appropriate response adjusting means for the above problems.

An object of the present invention is to provide a belt sander machine having an optimum structure capable of eliminating the above-mentioned drawbacks.

<Means for Solving Problems> In the present invention, the abrasive material layer formed on the abutting edge is made bulky at both ends thereof, the both ends being abrasive grain grinding portions, and the central portion thereof is made of the processed material. A dresser equipped with a grinding plate serving as a shaping part having a width substantially equal to the width is attached to an endless sanding belt 13
It is characterized in that it is placed opposite to the polished surface of.

<Operation> When the end edge of the grinding plate comes into contact with the polishing surface f of the belt 13 while the endless sanding belt 13 is running, the abrasive layer of the grinding plate has large abrasive grain grinding parts at both ends. Since they are protruding, the abrasive grains at both ends x of the belt are largely scraped off as compared with the center. Further, in the central shaping portion, the surface of the abrasive grain surface is shaped as in the conventional case, and the polishing can be satisfactorily performed.

As a result, the grinding surface of the endless sanding belt 13 becomes an effective grinding surface having a width substantially corresponding to the width of the processed material, and even if both ends x, x contact the billy roller 3,
I will not scrape this off.

<Example> An example of the present invention will be described with reference to Figs.

Reference numeral 20 denotes a dresser that is provided opposite to the polishing surface f of the endless sanding belt 13, and can be adjusted so as to be movable back and forth with respect to the polishing surface f of the belt 13 by a handle 21.

 The dresser 20 will be described in more detail.

Two tubular movement guides 24, 24 held by the vertical frame 9 are connected to a housing 23 that accommodates the handle 21, and the tubular movement guides 24, 24 have a screw portion 26 at the rear end. The formed moving shafts 25, 25 are mounted. In the rear part of the movement guide 24, worm gears 28, 28 meshing with gears 27, 27 fixed to the shaft 21a of the handle 21 are held, and the worm gears 28, 28 are screwed to the center of the worm gears 28, 28. The parts 26, 26 are screwed together. Therefore, by operating the handle 21, the worm gears 28, 28
When is rotated, the moving shaft 2 is moved by the screwing action of the screw parts 26, 26.
5,25 will move back and forth in the movement guidance 24,24.

A mounting member 2 that is long in the width direction is provided at the tip of the moving shafts 25, 25.
9 is fixed in a bridging manner, and a grinding plate 30 which is long in the width direction is attached to the front edge of the mounting member 29, and its abutting end 31 can be attached and detached by a screw 35 with the abutting end 31 facing the polishing surface f of the endless sanding belt 13. Have been bitten by.

The structure of the grinding plate 30 will be explained with reference to FIG.
Are formed. The electromagnetic adhesion diamond layer is for adhering the diamond powder and the grinding plate 30 after charging them in a magnetic field, and it is possible to vertically attach the diamond powder by magnetism.

The abrasive material layer 32 is made bulky at both end portions thereof, and this is used as the abrasive grain grinding portion 33, and the lower width portion of the central portion thereof is made to substantially coincide with the width of the processing material w to form the shaping portion 34.

The operation will be described. With the endless sanding belt 13 running, the handle 21 is rotated to press the contact end 31 of the grinding plate 30 against the polishing surface f of the endless sanding belt 13. As a result, as shown in FIG. 4, the abrasive grain grinding parts 33, 33 are located at both ends of the belt 13 exceeding the width of the processed material w.
x, x are strongly pressed to grind the abrasive grain layer y. Further, the shaping section 34, which is approximately equivalent to the width of the processed material w between the abrasive grain grinding sections 33, 33, is
Since the pressure contact force to the endless sanding belt 13 is weaker than that of the abrasive grain grinding section 33, a normal dressing action is performed, and a surface having a poor sharpness is shaped by polishing the processing material w, and the grinding force is Restore.

Therefore, both end portions x of the endless sanding belt 13,
Even if x exceeds the width of the processed material w and comes into direct contact with the billy roller 3, since the abrasive grain layer y is almost removed, the peripheral surface of the billy roller 3 is not ground.

<Effects of the Invention> As described in the above description, the present invention removes the abrasive grain layer y at both ends x, x beyond the processed material w of the endless sanding belt 13 by the abrasive material layer 32 of the dresser 20. Therefore, the billy roller 3 is not ground by the both ends x, x protruding from the processed material w, and the abrasion can be prevented. Moreover, since it is sufficient to prepare only the grinding plate 30 of the dresser 20 whose frequency of replacement is low corresponding to the width of the processed material w, there is an excellent effect that maintenance management is easy.

[Brief description of drawings]

1 is a vertical sectional side view of a dresser 20 according to an embodiment of the present invention, FIG. 2 is a cutaway plan view of the same portion, FIG. 3 is a perspective view of a grinding plate 30, and FIG. 4 is an endless sanding belt by the grinding plate 30.
A cross-sectional plan view extremely showing the grinding state of the abrasive grain layer 13 of 13
FIG. 6 is a schematic side view showing an example of a belt sander machine, and FIG. 6 is a vertical sectional front view showing a problem of a grinding mode. 2; material feeding frame, 3; billy roller, 8; material feeding passage, 11; tension roller, 12; contact roller, 13; endless sanding belt, 20; dresser, 30; grinding plate, 31; contact end, 32; Abrasive material layer, 33; Abrasive grain grinding section, 34; Shaping section

Continuation of front page (56) References JP-A-58-165958 (JP, A) JP-A-57-144657 (JP, A)

Claims (2)

(57) [Claims] 1. A contact roller, which is in pressure contact with a processed material, is provided inside an endless sanding belt that is wound around a belt guide mechanism, and a billy roller is provided opposite the contact roller and a material feeding passage. In this belt sander machine, the abrasive material layer formed on the abutting edge is made bulky at both ends, the both ends being abrasive grain grinding parts, and the center part thereof has a width substantially equal to the width of the processed material. A belt sander machine characterized in that a dresser equipped with a grinding plate serving as a shaping section is placed opposite to the polishing surface of an endless sanding belt. 2. The belt sander machine according to claim 1, wherein the abrasive layer is an electromagnetically-adhesive diamond layer.