JP3130842U - Grinder - Google Patents

Abstract

To make an endless grinding belt having a uniform thickness even at the seam, the accuracy of the thickness and shape of the edge of the band slab ground in a wedge shape should not depend on the rigidity of the fastening of the grinding machine and the play of the adjusting mechanism. Improve the grinding machine.
A pad 11 of a grinding machine 1 included in a band manufacturing machine is fixed to a main body 12 of the grinding machine, not to a main body of the band manufacturing machine, and a pressing ring 8 can be displaced with respect to the base. Deploy. The height adjustment can then be performed on or very close to the line through which the grinding force of the grinding belt acts on the band slab, and the moment arm and torsional moment are much smaller than before. Since the belt tension of the belt 9 acts in the same direction as the reaction force resulting from the grinding force of the grinding machine and acts on the pressing ring 8, the play existing on the pressing ring or the bearing to the grinding machine is minimized, The thickness variation of the joint surface is reduced.
[Selection] Figure 1

Description

  The invention relates to a grinding machine according to the preamble of claim 1. This grinding machine constitutes a seam of substantially uniform thickness after the ends of the band slab are bonded together so that they fit together and the opposite ends of the band slab to make an endless slab It is intended to cut diagonally. Such machines are used in particular for producing endless grinding belts.

  It is generally known to grind the end of a band slab into a wedge shape so that the band ends can be joined by overlapping and bonding. The purpose is then to give the band edges the correct geometry and bevel so that the seam is not thicker than the original substrate at any point.

  In order to perform such a grinding operation, a grinder is used, which is usually of the simple band grinder type. This grinding machine is usually fastened to the main body of the band manufacturing machine. The fastening is movable so that the height and lateral position of the grinder can be adjusted relative to the band slab with guide bars arranged perpendicular to each other.

  This grinding machine comprises on the one hand a drive wheel arranged on the motor shaft and on the other hand a pressing wheel or a guide pad for controlling the grinding belt arranged on this grinding machine. In this band making machine, the edge of the band slab passes through the grinding machine. Under the edge of the band slab and under the pressing ring, a rotating support belt as a support plate or a caulking plate installed in the main body of the band manufacturing machine is disposed together with a rotating grinding belt. This paddle keeps the edge of the band slab at the correct distance from the surface of the grinding belt.

  The thickness of the wedge-shaped seam surface at the end of the band slab is adjusted by adjusting the height of the grinder relative to the padding machine, and the width and shape of the seam surface is adjusted by the band end against the presser wheel. Adjustments are made by adjusting the inclination and lateral position of the grinding machine relative to this padding machine as it travels between the machines.

  During grinding, press the grinding belt against the edge of the band slab to be made. In this regard, the grinding machine bevels the wedge shape intended for the edge of the band slab.

  The thickness and shape accuracy obtained at the end of the band slab depends on the rigidity of the grinder fastening and the play on the height and lateral adjustment guide bar. This accuracy also depends on the grinding pressure and the torque produced by the distance between the caulker and the grinder fastening. The known construction is by no means completely rigid and these adjusting guide bars or the pressing and drive wheels of this grinding machine cannot be made completely without play. All these factors affect the adjustment of the grinder and make it inaccurate.

  Accordingly, these conventional solutions involve a lateral distance between the fastening of the grinder and the contact area of the grinding belt with the band slab in the cauldron, which can be several hundred millimeters. This means that significant moment arms and torsional moments are thereby caused. Moreover, the grinder exerts its total weight in the opposite direction to the grinding force, which further increases the influence of play on the grinder contact area and the grinder stability.

  Since the grinding pressure, or the force that holds the grinding belt in engagement, will vary depending on the wear and clogging of this grinding belt, the thickness and geometry of the seam surface is both at the inlet and outlet of the band slab and It changes during the course of the manufacturing process, which causes undesirable thickness variations in the bonded bands and causes problems during use of this band.

  The present invention can be used to avoid the above problems. The aim of the invention is therefore to achieve a simple improvement in the grinding machine that considerably simplifies its use.

  This object is achieved according to the invention by providing the grinding machine of the invention with the features described in claim 1. The subsequent independent claims describe appropriate further developments and variations of the invention that further improve its function.

  Instead of using the grinding machine height adjustment to determine the grinding depth or thickness of the finished joint surface on the band slab, this device makes the grinding machine the correct height relative to the passing end of the band slab. Based on the idea of using the machine height adjustment according to this device only for positioning.

  Therefore, the caulking plate provided in the grinding machine is fastened to the extension of the main body prepared by the grinding machine, not the main body of the band manufacturing machine, near the fastening of the pressing ring. In contrast, the pressing wheel provided by the grinding machine is arranged to be movable in a direction substantially perpendicular to the surface to be ground on the band slab.

  In the following description, the terms top and bottom indicate the direction to the grinding machine or its structural details, as shown in the accompanying drawings.

  The device described in the present invention obtains several advantages over known techniques. Accordingly, the movable fastening of the pressing wheel allows adjustment of the distance of the grinding machine relative to the padding in only one direction. This adjustment is very direct, accurate and robust and produces a much more reliable grinding result.

  In contrast to the previously known solutions, this batting plate does not require a lateral adjustment guide rod, so that the height adjustment is performed on a line that passes through the contact point where the grinding force of this grinding belt acts on the band slab. Or you can run very close to it. This means that the resulting grinding machine suffers from moment arms and torsional moments that are very small compared to conventional solutions.

  Since the belt tension of the grinding belt acts in the same direction as the reaction force resulting from the grinding force of the grinding machine and acts on the pressing ring, the play present on the pressing ring or on the bearing to the grinding machine is minimized.

Further advantages and details of the invention are disclosed in detail in the following description.
The invention will be described in more detail below with reference to the drawings.

  A preferred embodiment of this grinding machine will be described below with reference to the drawings. In this regard, this solution includes the components shown in these figures, all of which are indicated by reference numerals. These reference numbers match the reference numbers used in the following description.

  Thus, FIG. 1 shows a conventional band making machine and a grinder 1 it contains. The grinding machine is fastened to the body 2 of the band making machine by means of guide rods 3 and 4 so that the height and lateral position of the grinding machine are relative to the band slab 5 processed by the production machine. adjust. The grinding machine includes a drive wheel 6 disposed on the shaft of the drive motor 7 and a pressing wheel 8 for controlling an endless grinding belt 9 included in the grinding machine.

  The band slab 5 is fed into the band making machine so that the feed direction is perpendicular to the plane of the drawing, and the edge 10 of the band slab passes through the grinding machine 1. Thus, the edge of the band slab is carried by the rotating grinding belt 9 under the pressing wheel 8 of the grinding machine and above the pad 11 attached to the main body 2 of the band making machine. The batting plate, which is arranged under the pressing wheel, preferably includes a support plate or a rotating support wheel.

  The thickness, width and shape of the wedge-shaped joint surface obtained by grinding the edge 10 of the band slab 5 are adjusted by the height and lateral adjustment guide rods 3 and 4 with respect to the position of the pressing ring 8 with respect to the padding plate 11. Adjust by.

  In the solution according to FIGS. 2 and 3, the cauldron 11 is arranged substantially fixed to the body 12 of the grinding machine 1, unlike the previous solution. The pad and the pressing wheel 8 thus provide a gap 13 for guiding the edge 10 of the band slab 5. The size of the gap can be adjusted by disposing a pressing ring that can be displaced with respect to the padding plate so that the oblique angle of the edge can be determined.

  The height and lateral adjustment guide rods 3 and 4 are preferably used to adjust the position of the entire grinding machine 1 relative to the band slab 5, thereby allowing the width and shape of the wedge-shaped interface obtained by this grinding to be adjusted. . Other adjustment members, known per se, can also be used for the height and lateral adjustment. This grinder can also be adjusted at a position where the pressing wheel 8 is disposed obliquely with respect to the band slab. In such a position, the grinding belt 9 controlled by the pressing wheel will travel at an angle with respect to the band slab feed direction.

  The pressing wheel 8 is arranged to rotate on a mounting plate 14 that is displaceable in a direction substantially perpendicular to the joining surface to be ground on the band slab 5 by at least a guide 15, for example. This guide is arranged in a substantially fixed manner on the body 2 of the grinding machine 1, which means that distance adjustment can only be obtained in one direction between the pressing wheel 8 and the batting plate 11, so that this distance It means that the adjustment is very direct, accurate and robust. The distance adjusting guide can be arranged such that its control direction is substantially coincident or substantially parallel to a line through the contact point 16 where the grinding force of the grinding belt acts on the band slab. Is preferred. This minimizes the moment arm generated between the fastening point of the cauldron to the grinder body and the grinding force of the grinding belt. This means that the torsional moment that negatively affects the operation of the grinding machine can also be minimized.

  The distance between the pressing wheel 8 and the batting plate 11 is adjusted by an adjusting device 17, which may preferably be a micrometer. This adjusting device can act directly on the shaft 18 of the push ring, or it can act on the fastening plate 14 of the push ring according to FIG.

  In order to adjust the tension of the grinding belt 9 of the grinding machine 1, this grinding machine comprises a tension device 19 according to FIG. 3, in which the pneumatic cylinder acts on the drive wheel 6 and the grinding force of the grinding belt acts on the band slab 5. It is preferred to control in a direction that is substantially coincident with or substantially parallel to the line passing through the contact point 16 to be contacted. Therefore, since the band tension acts in the same direction as the reaction force generated by the grinding force and acts on the pressing ring 8, the play existing in the pressing ring or its suspension device is minimized. This band tension presses the pressing wheel 8 and its possible fastening plate 14 against the adjusting device 17, so that the play involved in this adjusting device is simultaneously minimized.

  This description and the associated drawings are only intended to illustrate this solution to the construction of the grinding machine. Therefore, this solution is not limited to the embodiments described above or in the appended claims, and numerous variations or alternative embodiments are possible within the idea described in the appended claims.

A conventional band manufacturing machine and its grinding machine are schematically shown in cross section. 1 schematically shows a cross section of a band manufacturing machine and its grinding machine according to the present invention. Fig. 3 shows a grinding machine according to section A-A in Fig. 2;

Claims (8)

Adjusting the height and lateral position of this grinding machine with respect to the band slab (5) to be machined, especially for endless bands of flexible grinding material, with a grinding machine (1) for forming a joint surface at the band seam For this purpose, the adjusting means (3, 4) are attached to the main body (2) of the band manufacturing machine, the main body (2), the drive wheel (6) arranged on the shaft of the drive motor (7), and this grinding machine In a grinding machine including a pressing ring (8) for controlling an endless grinding belt (9) prepared by
The grinder (1) includes a paddle (11) disposed substantially fixed to the main body (12) of the grinder,
A grinding machine characterized in that the pressing wheel (8) is disposed so as to be displaceable with respect to the padding machine.   The grinding machine (1) as claimed in claim 1, wherein the pressing wheel (8) is displaceable in a direction substantially perpendicular to the joining surface to be ground on the band slab (5). Features a grinding machine.   3. A grinding machine (1) as claimed in claim 2, wherein said pressing ring (8) is arranged on at least one guide (15) arranged substantially fixed on said body (12) of this grinding machine. A grinding machine characterized by being arranged.   In the grinding machine (1) claimed in claim 3, the guide (15) is a line passing through a contact point where the grinding force generated by the grinding belt (9) acts on the band slab (5). And a grinding machine characterized by being arranged substantially parallel to each other.   The grinding machine (1) claimed in claim 3 or 4, wherein the guide (15) is a contact point at which a grinding force generated by the grinding belt (9) acts on the band slab (5). A grinding machine characterized in that it is arranged substantially in line with a line passing through.   A grinding machine (1) as claimed in any one of claims 1 to 5, wherein the pressing ring (8) is substantially attached to the joint surface to be ground on the band slab (5). A grinding machine characterized in that it is arranged so as to be displaced by an adjusting device (17) arranged so as to act on the pressing wheel in a direction perpendicular to the pressing wheel.   The grinding machine (1) claimed in claim 6 is arranged so that the tension of the grinding belt (9) is adjusted by a tension device (19), and the pressing ring (8) is provided with the tension device. A grinding machine characterized in that it is arranged so as to be displaced in a direction opposite to the operation direction of (19).   A grinding machine (1) as claimed in any one of claims 1 to 7, wherein the grinding machine (1) moves the grinding belt (9) controlled by the pressing ring (8). A grinding machine characterized in that it is arranged obliquely with respect to the band slab (5) so that the direction forms an angle with respect to the feeding direction of the band slab.

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