SU1516325A1 - Method of dressing abrasive bands - Google Patents

Abstract

The invention relates to grinding and can be used when dressing an abrasive tool, preferably abrasive belts. The purpose of the invention is to increase the cutting ability of the tool. The abrasive belt 1, which is worn on the roller 2, is edited when the belt is in contact with the right-hand disk 3. Contact line 4 must not pass through the axis of rotation of the disk. The condition for locating the rotation axis at different distances from the ends of the contact line of the pressure roller should also be met. It is preferable to provide the condition of the same displacement of the contact line relative to the center of rotation of the disk. 1 hp f-ly, 4 ill.

Description

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The invention relates to spiking and can be used in the preparation of an abrasive tool mainly with abrasive belts.

The purpose of the invention is to increase the tool's driving ability.

Figure 1 shows a diagram of editing by the claim tool; 2 is the same, top view; FIG. 3 is the same, side view; FIG. 4 shows the profile of the abrasive surface of the tape before and after dressing.

The abrasive belt 1, worn on the blade 2, is pressed against the right-hand disk 3, forming the contact line 4. During dressing, the profile 5 of the abrasive surface is converted into profile 6. The ruling disk 3 rotates around the axis O, and the contact line of the roller 2 and the disk 3 moves along a KM line parallel to the DE line.

The drawings are also indicated;

OS - perpendicular p to the path of the contact line KM, lowered from the center of rotation;

About the axis of rotation of the disk 3;

A is the distance between the line 4 of the contact, and the same trajectory of the line of contact KM and the line DE;

B is the distance between the perpendicular of the OS and the middle of the roller 2;

Od - the speed of the abrasive belt 1;

(l) p - angular velocity of the contact roller;

Vg is the speed of the relative movement (movement) of the contact roller 2 and the axis of the disk 3;

W, COj. angular velocity of the disk

3;

F is the direction of movement of the contact roller 2 with the tape 1 to the disk 3 to execute the dressing;

P - clamping force abrasive. tape 1 contact roller 2 to the working surface of the disk 3;

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Pg.tangential components of the interaction force of the tape 1 with the working surface of the disk 3;

Pr,

Р - tangents are

tangential forces P and P (relative to the axis of rotation 3);

p J pC, are the normal components of the tangential forces P, P passing through the axis of rotation of the disk 3.

Dashed lines in Figures 1 and 2 show a contact roller 2 with flax.

That 1 in symmetric in respect -, - to the perpendicular to the OS position.

To edit the abrasive belt, 1 pin roller 2 is lowered onto the working surface of the disk 3 (movement F).

The contact roller 2 presses the tape 1 to the working surface of the disk 2 by the force P. The force interaction occurs along the line A of the contact. A tangential force arises.

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(P - for the symmetrical position of the contact roller). If the tangential force R., is decomposed in two perpendicular components in the plane of the disk 3, then the tangent component R. and the normal component PZ will be marked. The tangent component P of the tangential force P causes the rotation of the disk 3, freely mounted in bearings with angular velocity. In the contact zone there is a relative slippage between the tape 1 and the working surface of the disk 3, the vector of which does not coincide with the speed vector of the tape 1 on the line 4 of the contact. The force interaction of the tape 1 with the wear-resistant working surface of the disk 3 while simultaneously moving them causes the formation of a profile of the relief of the working surface of the belt 1 with cutting edges, which are much smaller and much more regular compared with the original profile 5 to edit the tape (Fig. one) .

With an increase in the distance B between the middle of the contact roller 2 and the first operating wheel of the OS, the moment of force P grows, which causes an increase in the angular velocity of the CO disk 3. When V O the disk 3 in MOMei T does not move O (p:

 R).

This is prevented because Pr- - v The relative slippage of the tape 1 and the disk 3 in the direction perpendicular to the velocity vector of the tape 1 on the line 4 of their contact is absent. The absence of rotation of the disk 3 causes significant temperature loads acting on the wear-resistant working surface of the disk on the line 4 of the contact. This causes rapid wear and destruction of the disk 3. Therefore, a symmetrical arrangement of the contact line 4 relative to 15 should be avoided.

but perpendicular to it, dropped on it from the center of rotation.

Increasing the distance A increases the relative slippage of the tape 1 and the disk 3 in the direction perpendicular to the velocity vector of the tape 1 on the line 4 of their contact, which causes a slight decrease in the angular velocity of the disk 3, AT AO (i.e., when the continuation of the contact line passes through the center of rotation, the disk 3 rotates with a maximum angular velocity to,. The relative slippage in the direction perpendicular to the velocity vector of the belt 1 on the line 4 of the contact is zero. Therefore, the disk 3 acquires a significant angular velocity, which leads to an increase in the dynamic loads on the tape 1. This reduces the performance properties of the tapes, especially when the device implementing the method is not rigid enough. Positions in which AO should be avoided.

By changing the position of the line 4 of the contact of the abrasive belt 1 with the disk 3 (by adjusting the values of A and B), achieve the desired angular velocity of rotation of the disk 3, which is most appropriate for specific particular conditions of dressing the belt 1.

To ensure more uniform wear and more complete use of the wear-resistant material of the suit 3, the contact roller 2 is given a relative reciprocating motion with the speed Vj in the direction of the axis of the contact roller 2 (in the direction of the contact line 4). This movement of the contact roller 2 is viewed with respect to the axis of the claim 3, since the disc itself is in rotation. With such a reciprocating motion, the contact roller is displaced symmetrically to the right and to the left of the perpendicular located on the trajectory of the contact line KM from the center of rotation.

Being on the left relative to the perpendicular OS, the contact roller 2 with the moving belt 1 pressed against the surface of the disk 3, forces the disk -3 to rotate with angular velocity c. If the contact roller 2 moves in the direction of its axis, the right perpendicular OS, that

at first, due to inertial force, the disk 3 continues to rotate with an angular velocity (l f then its direction of rotation changes to the opposite (angular velocity CO). A subdivision of the rotational direction does not allow the disc 3 to develop a significant angular velocity and leads to a permanent change in the position of the line 4 tape contacts with the surface of the disk.

3, The latter is the condition for uniform wear of the working surface of the disk 3.

Claims (2)

1. A method for editing abrasive belts, in which a pressure roller with an abrasive belt is brought into contact with the right tool and informed n is a relative reciprocating movement, characterized in that, in order to increase the cutting ability of the belt, as a ruling tool. they take a disk, install it with the possibility of free rotation, and hold the pressure roller with abrasive tape in contact with the end surface of this disk along a line that does not pass through the axis of rotation of the disk and depending on the location of its axis of rotation at different distances from the ends of the contact line roller. 2. A method according to claim 1, characterized in that the relative reciprocating movement of the pressure roller to the disk is carried out from the condition of the same amount of displacement of the contact line relative to the center of rotation of the disk. 0 five fiol yy BUT fig 2