SU546440A1 - Sharpening machine for band saws - Google Patents

Description

one

The invention relates to the area of sharpening the cutting edges of the saw teeth with grinding wheels.

The known machine for sharpening the teeth of ribbon p "l, containing a frame, a grinding wheel with an abrasive wheel, mounted on it, a carriage driven by a reciprocating movement, a saw feed mechanism in a step and a jig carrying supports, one" 3 of which is equipped with the supporting element in contact with the working surface with the rear face of the saw tooth.

In order to uniformly harden and maintain the dimensions of the smoothing pad on the back face of the saw tooth, final calibration of the pad, keep the saw from returning from the scraper feed from the cutting force during the swing motion relative to the supporting elements in the proposed machine, the working surface of the supporting element is designed as areas stepwise converging towards the vertex of the support element with a decrease in their angle of inclination to the plane perpendicular to the direction of the step feed.

In addition, the sites are made with constant or incremental masses, with the first and last sites being increased by no less than 1.5 times compared with the last and previous ones, respectively.

FIG. 1 shows the carriage and clamping fixture of the proposed machine, view in plan; in fig. 2 - the stop, located behind the abrasive wheel in the course of the step feed, at the time of the rear edge of the saw tooth, is plan view; in fig. 3 - an emphasis with the increased first platform, a type in the plan; in fig. 4 - an emphasis with the increased last platform, a type in the plan.

A grinding head (not shown in the drawing) with an abrasive wheel 1, a carriage 2 with a drive (not shown in the drawing) of reciprocating motion to the latter, the feed mechanism 3

saws 4 in pitch and clamping device 5 - with rear clamp 6, spring-loaded spring 7, and rear 8, front 9 and additional 10 stops. A support element 11 is fixed on the front stop with a carbide plate 12 pressed in on it, in contact with the rear face of the saw tooth 4, and a plate 13 in contact with the front face. Plates 12 and 13 on the support element 11 are installed at an angle to each other. The top 14 of the support element is rounded. The working surface of the plate 12 is made in the form of staggered pads 15, converging to the leg 14 of the support element. Each pad 15

Claims (5)

inclined to the plane perpendicular to the step feed direction at an angle decreasing to the top 14. The plate 13 is made flat. The pads on nlastina 12 are arranged with the same or increasing pitch, and their number depends on the pitch of the teeth or the degree of hardening and the cleanliness of the contact pads on the face of the tooth. The first and last platforms are increased by at least 1.5 times compared with other neighboring sites. Before starting the work-machine, the top 14 of the support element 11 should be located in the cavity between the teeth. The machine works as follows. After processing the next interdent saw 4 served in the direction of step feed 0.5-0.95 part of the step. When applying the back face of the tooth with its contact pad at the top, it slides over the stepped steps. In this case, the surface layer of the metal of the contact pad is heated, strengthened and ironed. The contact pad is finally calibrated with the last pad of the support element plate 12, which is more than the previous one. at the time of smoothing, the saw blade 4 moves at an angle from the support elements, acting on the rear clamp 6 and compressing the spring 7. With the corner departure of the saw, the angle between the rear face and each pad 15 remains constant. At the end of the step feed, the cutting edge of the tooth slides from the top 14 to the working surface of the plate 13. The saw feed in a step at this moment is stopped. Under the action of the spring 7, the saw 4 is fed by the clamp 6 on the support element I. The front face of the tooth with the contact pad slides along the surface of the plate 13, and the saw is sent to the rest of the pitch. The back and front .npf-ironed at a length of 0.5-2 mm from the re-running edge. The cleanliness of the ironed surface reaches the V8-V9 class. Formula 1. The machine for sharpening the teeth of band saws, containing a frame, a grinding wheel mounted on it with an abrasive wheel, a carriage with a reciprocating drive, a saw feed mechanism in pitch and a jig supporting the stops, one of which is provided with a support element, in contact with the working surface, with the rear face of the saw tooth, characterized in that, in order to uniformly harden and maintain the dimensions of the ironed contact pad on the rear edge of the saw tooth, its movement relative to the supporting elements, the working surface of the supporting element is made in the form of platforms, stepwise converging to the top of the supporting element with a decrease in their angle of inclination to the plane perpendicular to the direction of the step feed. 2. The machine tool according to claim 1, characterized in that the pads are made with constant pitch. 3. The machine tool according to claim 1, characterized in that the pads are made with increasing daag. 4. Machine on pi. 1 and 3, characterized in that, in order to preserve the 1 return of the saw against the step feed from the cutting force, the first platform is increased not less than .1.5 times as compared to the last. 5. Machine on PP. 1 and 3, characterized in that, for the purpose of final calibration of the progressed area on the rear face, the last platform is increased at least 1.5 times compared to the previous one. pz 7 / 73