SU1151431A1 - Device for band grinding - Google Patents

Abstract

TAPE GRINDING DEVICE, made in the form of bearing abrasive and discharging belts of driving and driven pulleys and tensioning rollers located under it, characterized in that in order to increase grinding performance by increasing the adhesion forces of the abrasive belt with pulleys, the tensioning roller is located in the area the joint contact between the discharge and abrasive belts on the working side of the latter, while the angle of the tension of the tensioning roller with ribbons is at least 180 °.

Description

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The invention relates to mechanical engineering and can be used for grinding and polishing surfaces of parts with an endless abrasive belt.

A device for processing parts consisting of an abrasive belt, worn on pulleys, one of which is driven, and an elastic belt, which by its outer side contact with the inner side of the abrasive belt, worn on the support and contact rollers Go.

The disadvantages of the known device are the presence of a slip in the engagement of the abrasive and elastic tapes and the rapid wear of the abrasive tape on the inner side due to its constant tension.

The purpose of the invention is to increase the productivity of processing with a simultaneous increase in the service life of the abrasive belt.

The goal is achieved by the fact that in the device for belt grinding, made in the form of bearing abrasive and discharging tape located below it, drive and driven pulleys and tensioning roller, the latter is located in the zone of joint contact of the discharge and abrasive tapes on the working side of the abrasive tape, while the angle Wrapping the tension roller with ribbons must be at least 180.

In Fig.1 schematically shows a device with a contact roller, a General view. figure 2 - section aa in fig.T on. Fig. 3 is a device for processing parts with a free branch; general view.

The device consists of an endless abrasive belt 1, worn from the inside on the vedo1 "1st pulley - contact roller 2 or support roller 3 and on the elastic tape 4 mounted on the drive pulley 5 and the support rollers 6 and 7. The abrasive tape 1 with its inner side and the elastic band 4 with its outer side makes contact with each other in the area from the support roller 7 to the drive pulley 5 in the direction of the belts 4 and 1 and grip the tension roller 8, mounted on the outside of the abrasive belt 1 so.

that the angle of its circumference is at least 180. The pressing of the abrasive belt 1 to the roller 8 is achieved by tensioning the elastic belt with one of the support rollers 6 or 7.

If the device is executed by a contact roller 2 pressing the abrasive belt 1 to the workpiece 9 (FIG. 1), the drive pulley 5, the support rollers 6 and the elastic belt 4 are notched to prevent slipping.

In the case of a device for processing parts with a free branch in contact with the workpiece 9 (Fig. 3), the elastic band 4 is made in the form of a flat belt. When machining part 9 with preloading of the abrasive belt 1, each of the rollers 6 or 7 may be contact.

The device works as follows.

When the driving pulley 5 rotates, the circumferential force from the pulley 5 is transferred to the elastic band 4, which presses the abrasive tape 1 against the roller 8 while the elastic band 4 is tensioned. When pressing the elastic band 4 and the abrasive tape 1 to the roller 8, the latter also begins to rotate and pulls the abrasive belt 1, which, in the course of rotation in the area between the rollers 8 and 7, is pressed against the elastic belt 4 by increasing the resistance of the belt to rotation by cutting forces that occur during grinding, and begins to perceive transmitted from the drive shaft va 5 circumferential force.

Making the device for processing parts with an abrasive belt with a tension roller wrapped around the abrasive and elastic tapes and located in the area behind the support roller and in front of the driving pulley in the direction of movement of the tapes, allows to increase the productivity of the treatment by pressing the abrasive tape against the tension roller with an elastic tape, allowing for a relatively large tension, and nal-gchichi zone of joint contact of two tapes during tension of the abrasive tape by the force of resistance to the rotation of the tape by the cutting forces, and J also reduce the wear on the abrasive tape by eliminating the need for its constant tension. The increase in the productivity of the device is achieved by increasing the circumferential force transmitted by the abrasive belt from the pulley. In the proposed device, the circumferential force is limited only by the tensile strength of the abrasive belt, since at its maximum value the slippage of the abrasive belt does not increase, which is the case in known devices, when the limit value of the transmitted circumferential force is chosen one and a half times less than the tension force of the abrasive tapes. Increasing the transmitted circumferential force increases the removal of processed material. Reducing the slip of the abrasive belt with maximum circumferential force reduces its wear from the inside, which increases the service life of the abrasive belt.

YES

1151431

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Claims (1)

DEVICE FOR TAPE GRINDING, made in the form of non-abrasive and located under it discharge tape of drive and driven pulleys and a tension roller, characterized in that, in order to increase grinding performance by increasing the adhesion forces of the abrasive belt with pulleys, the tension roller is located in the joint contact of the unloading and abrasive belts from the working side of the latter, while the angle of circumference of the tension roller by tapes is at least 180 °.