JPH01321157A - Supporting body for workpiece of belt grinder - Google Patents

Abstract

PURPOSE:To prevent an edge portion from being excessively scraped off by forming the interval between the outer peripheral face of an elastically pressing roller and the outer peripheral face of a supporting roller which are opposite to each other via a ring belt to be larger on the edge portions of a band-like metal plate workpiece than on the center portion thereof. CONSTITUTION:As a workpiece 2 which is a band like metal plate is sent into between a rubber elastic roller 6 and a supporting roller 3 with both edges thereof being guided by each groove 15 of a pair of guide members 12, the workpiece 2 is installed between a ring type belt 1 on which abrasive grains are deposited and the supporting face 9 of the supporting roller 3. At this time, both edge portions of the workpiece 2 are slightly elastically deformed toward the supporting roller 3 side by the pressing force of the elastically pressing roller 6, causing the elastically pressing force on the surface of the workpiece 2 to be nearly equal at the edge portions and center portion thereof, to uniformly grind the surface by means of the ring type belt 1. The other side is ground by means of a grinder in which the elastically pressing roller 6 and supporting roller 3 are reversely placed. Thus, it can be prevented that the edge portions of the workpiece is excessively scraped off more than the center portion, enabling highly accurate grinding.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a belt grinder that continuously grinds the surface of a band-shaped metal plate, and it is a belt grinder that continuously grinds the surface of a band-shaped metal plate. Regarding the prevented work support.

[Traditional technique]

An example of a belt grinder is constructed as shown in FIG. That is, a pair of guide rollers 17 and a pressure roller 6 are positioned vertically apart from each other, and the annular belt 1 is suspended between them. Abrasive grains are attached to the surface of the annular belt 1, and the rotation of the pressure roller 6 and the guide roller 17 causes the belt 1 to revolve between the roller 6 and the guide roller 17. A support roller 3 for supporting a workpiece is rotatably positioned opposite the pressure roller 6 via the annular belt 1. The support roller 3 and the pressure roller 6 are
It was formed as shown in Figure 7 during use of the grinder. A workpiece 2 is inserted between the annular belt 1 suspended around the outer periphery of the pressure roller 6 and the outer periphery of the support roller 3, and one surface of the workpiece 2 is ground by the annular belt 1. Note that the surface of the roller that presses the heald may be made of metal or rubber. When the belt pressing roller is made of a rubber material, it has the advantage that the amount of grinding can be extremely large and the grinding work can be completed quickly. On the other hand, if the surface of the roller that presses the annular belt 1 is made of steel, the amount of scraping will be small;
Only 5/1000th of a millimeter can be ground in one grinding process, which is inefficient. If a rubber pressure roller 6 is used, 1
The amount of grinding per time is about 1/10 - 2/100, and the grinding efficiency is extremely high.

[Problem to be solved]

However, when the pressure roller 6 made of a rubber material is used as the belt pressure roller, at the edge of the workpiece 2 located between the annular belt l and the support roller 3, the pressure roller 6 is moved as shown in FIG. The central part undergoes a different deformation,
The pressing force at the edge of the workpiece 2 is greater than that at the center. Then, the thickness of the edge portion 19 of the workpiece 2 after grinding becomes slightly smaller than that of the center portion, as shown in FIG. This means that if the pressure roller 6 is used, the grinding accuracy at the edge of the workpiece 2 will be poor.

[Means to solve the problem]

Therefore, as a result of various experiments, the present inventor has devised a workpiece support that does not cause excessive scraping of the edge of the workpiece 2 even when the rubber pressure roller 6 is used. Its composition is as follows.

That is, the annular belt 1 has abrasive grains attached to its surface, guides the annular belt 1, and guides the annular belt 1 to the workpiece 2.
It has a pressure roller 6 that presses against the surface. The support roller 3 is positioned opposite the pressure roller 6 via the annular belt 1.

Here, the feature of the present invention is that the axis of the pressure roller 6 and the axis of the support roller 3 are located parallel to each other, and when the workpiece 2 is interposed between both the pressure roller 6 and the support roller 3, the The distance between the outer circumferential surface of the pressure roller 6 and the outer circumferential surface of the support roller 3 is set larger at the edge than at the center of the work 2 so that the edge of the work 2 can be elastically deformed toward the support roller 3 with respect to the center of the work. Configure it so that

Alternatively, the support roller 3 is formed so that it does not exist at the edge thereof.

Further, in a preferred embodiment of the present invention, in the above structure, a pair of work guide grooves 15 are formed in a direction intersecting a plane connecting the axis of the work 2 and the axis of the support roller 3.

The distance between the opposing groove bottoms is formed to be approximately equal to the width of the workpiece 2, and the groove 15 is not located within a plane connecting both axes.

Therefore, according to the present invention, the edge of the workpiece 2 is elastically deformed toward the support roller 3 side as shown in FIG. 1, and the pressing force between the annular belt 1 and the workpiece 2 can be kept constant at each part as a whole. . This makes it possible to maintain high grinding accuracy on the surface of the workpiece 2 up to its edges.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

In the present invention, in a belt grinding machine 4 as shown in FIG. 6, the relationship between the pressure roller 6 and the support roller 3 is formed as shown in FIGS. 1 to 5. FIG. 1 is a longitudinal cross-sectional view of a main part thereof, showing a state in which a workpiece 2 is pressed by a pressure roller 6. In FIG. 2, the pressure roller 6 is separated from the workpiece 2, and the workpiece 2 is positioned on the support surface 9 of the support roller 3 in a free state. Further, FIG. 3 is a side view of a main part showing the grinding state of the workpiece 2, and FIG. 4 is a perspective view thereof. In this embodiment, the pressure roller 6 is a known one, made of a rubber material, and has a spiral groove 13 on its outer peripheral surface.
(Fig. 4) are formed in large numbers. Next, the pressure roller 6
A plurality of guide members 12 are positioned below and parallel to each other and spaced apart from each other in the axial direction. This guide member 12 has a groove 15 formed on the upper edge of its side surface. Further, a notch 16 is formed at the center of the upper end surface of the guide member 12, and the center of the notch 16 is formed into an arc shape as if the groove 15 was cut out. Next, a relatively deep escape groove 14 is formed in the lower end surface of the guide member 12 at a position below the cutout 16, into which the shaft 8 of the support roller 3 is inserted. Next, the support roller 3 is formed into a stepped shaft shape as shown in FIG. That is, a plurality of support surfaces 9 are arranged protruding from the outer periphery of the shaft portion 8 at equal intervals, and the width of the support surfaces 9 is formed to be smaller than the distance between the side surfaces of a pair of adjacent guide members 12, 12. Next, right above the axis of the shaft portion 8, the upper end of the support surface 9 is formed higher than the upper end of the cutout portion 16 of the guide member 12 by δ. Although this δ is expressed extremely in the figure, in reality it is often as small as about 0.1 mm. This minute amount δ is determined as follows. That is, δ is the edge 1 of the workpiece 2 in the conventional grinding machine.
9 is set to be large in proportion to the height to be removed, - for example approximately equal to the amount of over-shaving. Also this δ
is experimentally changed depending on the thickness of the workpiece 2, the distance of the gap between the support surface 9 and the guide member 12, and other conditions.

Thus, both edges of the workpiece 2 are guided by the respective grooves 15 of the pair of guide members 12.12, and the workpiece 2 is fed between the workpiece 2, the pressure roller 6, and the support roller 3. Then, Figures 1 and 3
As shown in the figure (the workpiece 2 is interposed between the annular belt l and the support surface 9 of the support roller 3. Both edges of the workpiece 2 are slightly pushed toward the support roller 3 side by the pressing force of the pressure roller 6. The workpiece 2 is elastically deformed. In this state, the elastic force on the surface of the workpiece 2 is approximately the same at both the edges and the center.

Therefore, one surface of the workpiece 2 is manufactured uniformly. Further, the other surface is ground by a grinder in which the pressure roller 6 and the support roller 3 are placed in an opposite vertical relationship.

Next, FIG. 10 shows a second embodiment of the present invention, and FIG. 11 is a sectional view taken along the line A--A in FIG. 10. In this embodiment, the distance between the side surface of the support surface 9 of the support roller 3 and the side surface of the guide member 12 is small. This embodiment is most suitable for a workpiece whose width is relatively small to be guided by the groove 15 of the guide member 12.

In this embodiment, the outer peripheral surface of the support surface 9 of the support roller 3 is formed into a slightly arcuate shape.

When the workpiece guided onto the surface of the support surface 9 is pressed by the elastic arm, it is slightly elastically deformed along the curved surface of the support surface 9. Note that the workpiece does not necessarily come into contact with the entire surface of the support surface 9 when pressed by the elastic roller. In other words, only a certain range in the center may be in contact with each other.

In addition, Fig. 8 and Fig. 9 respectively show the main part (edge 1) of the cross section of the hoop material (used as a saw blade) actually ground for a band saw of a machine tool. is based on the present invention, and FIG. 8 is based on a conventional grinding machine. In this example, a device with a thickness of 1.06 mm, a width of 32 mm, and a length of 2 m is used, and the state of each enlarged edge portion is shown. A saw blade will later be formed on this edge. Therefore, the sharper this edge is formed, the better the sharpness of the saw blade will be. In the present invention, sharp corners of the hoop material were formed by one-time grinding on both the upper and lower surfaces as shown in FIG. Further, FIG. 8 shows a grinding machine of a conventional type, and there is so-called wobbling in some corners of the grinding machine. It is known that the saw blade of a band saw made of such a workpiece has poor sharpness.

〔Effect of the invention〕

Since the work support of the present invention has the above structure,
It is possible to prevent the edges of the work 2 from being scraped off more than the center of the work 2, resulting in a highly accurate work support.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing the main parts of the first embodiment of the present invention, and is a partially enlarged view of FIG. 5, and FIG. 2 is the same cross-sectional view, in which a workpiece 2 is supported in a free state. 3 is a partial cross-sectional side view of the same embodiment, FIG. 4 is a schematic perspective view of the same embodiment, and FIG. 5 is an overall longitudinal sectional view of the same embodiment. 3 is a cross-sectional view taken along the arrow ■-V, FIG. 6 is an overall view of the belt grinder 4 having the support of the present invention, and FIG. 7 is a longitudinal cross-sectional view of the main part during grinding by a conventional belt grinder. Figure 8 shows the end of the workpiece 2 ground by the same grinder,
FIG. 9 is a cross-sectional view of a main part of a workpiece 2 ground using the workpiece support of the present invention, and FIG. A sectional view, FIG. 11 is a sectional view taken along the line A-A in FIG. 10. l... Annular belt 2... Work 3... Support roller 4... Belt grinder 5... Work support 6... Pressure roller 8... Shaft portion 9
... Support surface 10 ... Bearing 11 ... Bolt 12 ... Guide member 13 ... Spiral groove 14
... Relief groove 15 ... Groove 16 ... Notch part 17 ... Guide roller 18 ... Cooling liquid supply device 19 ... Edge 20 ... Base agent Patent attorney Kubo 1) Takumi Figure 1 Figure 2 Figure 5 Figure 7

Claims (1)

[Claims] 1) An annular belt (1) having abrasive grains on its surface, which guides the belt (1) and guides the belt (1) to the workpiece (2).
) a pressure roller (6) that presses against the surface of the belt (1);
), the work support roller (3) is positioned opposite to the pressure roller (6), and the work support roller (3) is located opposite to the pressure roller (6) through ) are positioned parallel to the axes of the rollers (6) and (3), so that the edge of the workpiece (2) interposed between the rollers (6) and (3) can be elastically deformed toward the support roller (3) with respect to the center of the workpiece. The distance between the outer circumferential surface of the pressure roller (6) and the outer circumferential surface of the support roller (3) is made larger at the edge than at the center of the workpiece (2), or the support roller (3) is ) A workpiece support for a belt grinding machine, characterized in that it is formed so that no 2) In claim 1, the pressure roller (
A pair of workpiece guide grooves (15) are formed in a direction intersecting the plane connecting the axis of the workpiece (6) and the axis of the support roller (3), and the distance between the opposing groove bottoms is set to the workpiece ( 2), and the groove (15) is formed approximately equal in width to the groove (15).
is a workpiece support formed so as not to exist within the plane connecting the two axes.