SU1738417A1 - Apparatus for calibrating toothed band - Google Patents

Abstract

Usage: elimination of local deformations of products from sheet material, mainly for the calibration of toothed belts of drums for cotton raw cotton. The device contains clamping and pulling rollers mounted on the frame and a mechanism for bending the teeth located between the clamping rollers, made in the form of an eccentric and a spring-loaded pivoting lever cooperating with it with a prismatic tool at the end. The axis of the lever is placed in front of a prismatic tool along the process. During the calibration process, the rollers clamp and stretch the tape, under the action of a rotating eccentric, the lever oscillates with a prismatic tool, which makes it easier for the bent teeth to rise when they interact with the tool. When the force of the spring exceeds the force of raising the teeth, the lever rotates and the tool comes out of contact with the teeth of the tape, which prevents its breakage. 7 il. (Ls

Description

The invention relates to the processing of metals by pressure, more specifically to devices for eliminating local deformations on products made from sheet metal.

U-shaped serrated tape is widely used in cleaning machines for cleaning raw cotton. The tape is a base with teeth on both sides, which are bent to one side from the base of the tape at an angle of 90 °. The tape is wound and fixed on the drums of the top cleaner. In the course of work, the teeth of the belt are polluted, and when interacting with earth clumps or stones that have fallen into the clean heap of raw cotton, the tape teeth are bent as

inside the tape and out. When repairing the heap cleaners, the drums are removed, the old tape is removed and the new tape is wound.

Repair of heap cleaners is carried out every 2-3 years, depending on tape wear. Old tape is not repairable. This is due to the fact that using the correct rollers, it is possible to raise the teeth relative to the base of the tape, bent outwards. In this case, the teeth bent inward, pressed against the base of the tape even more and make it inflexible and unsuitable for winding on the drum. In addition, the reduction of working teeth on the tape significantly reduces its cleansing ability.

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A device for dressing is known that contains profiled pulling rollers installed in pairs on a frame (see A. S. M: 1207557. Cl. B 21 D 5/06, 22,12.83) (1).

A disadvantage of this device is the possibility of breaking the tape.

The purpose of the invention is to reduce tape breakage.

The goal is achieved by the fact that the device is equipped with two clamping rollers placed in front of the pulling rollers and a mechanism for bending the teeth between them, made in the form of an eccentric mounted on the frame, interacting with it a spring-loaded swivel lever and rigidly connected with the end of the last prismatic tool, with This axis of rotation of the lever is located in front of a prismatic tool along the process.

FIG. Figure 1 shows a toothed belt calibration machine; in fig. 2 is a sectional view of a toothed belt calibration device; in fig. 3 shows section A-A in FIG. 2; in fig. 4 and 5 —the tool of the mechanism for bending the teeth; in fig. 6 and 7 is a mechanism for folding teeth in operation.

The machine for calibrating the toothed belt contains a bed 1, on which a freely rotating cone 2 is mounted for installing a coiled toothed belt on it, a device for calibrating toothed belt 3 and a cassette 4 for winding the calibrated tape. The device for calibrating the toothed belt 3 consists of two pairs of regular pulling rollers 5 connected to a drive of the teeth bending mechanism, including a prismatic tool 6, mounted on the double-arm lever 7, swiveling around the axis 8 and spring loaded 9. The pressure rollers 10 and 11 press the tape 12, 13-teeth of the tape, 14 eccentric, 15-hole for mounting the end of the spring 9.

The device works as follows.

The coil of twisted tape is put on the cone 2. The end of the tape is straightened manually and loaded into pairs of rollers 5. The rollers 5 are driven by the drive

and as the tape 12 enters, the end is fed into the cassette 4, which is also connected to the drive. When the tape 12 is moving, it interacts with pinch rollers: at first, narrow - 10, and then wide - 11.

Between the rollers there is a tool 6, the toe of which is wedged under the teeth 13 bent inward, and when the tape 12 is moving, it lifts them. Next, the tape 12 falls between the profiled pairs of rollers 5 and straightens completely, the Eccentric 14 causes the lever 7 and the tool 6 to oscillate, which makes it easier to lift the teeth 13. If the bent tooth 13 (Fig. 6) rises with great effort, the tool b

moves to the right (Fig. 7), while the end of the tool 6 is raised above the base of the belt 12, facilitating the passage of the belt. This is due to the fact that the normal, drawn from the axis 8 to the belt 12, is in front of the sharp end of the tool b, the spring 9 returns the lever 7 to its previous position. This prevents the tape 12 from breaking.

Claims (1)

Invention Formula A device for calibrating a toothed belt containing correct pulling rollers arranged in pairs on the frame, characterized in that reducing the breakage of the tape, it is provided with two clamping rollers placed in front of the pulling rollers and a mechanism for bending the teeth between them, made in the form an eccentric mounted on the frame, a spring-loaded pivoting lever interacting with it and rigidly connected to the end of the last prismatic tool, while the axis of rotation of the lever located in front of a prismatic tool hike process. G 2/70 / --tf P178Sh eight Fy 5 Yi 7