Definition of bead rotation and movement

During the use of the rope saw, the fixed material can not firmly fix the beads, so that the steel rope of the beads rotates and moves along the wire rope, which is the phenomenon that the distance between some beads changes or even connects.

Cause analysis,

Bead rotation is generally due to the production method, rubber vulcanization or injection molding process control is not strict caused by bead movement in addition to the above reasons, and there are:

1: The amount of the knife is too large

2: when the wire rope is broken, the rope saw is twisted into the machine flywheel or encounters other obstacles;

3: other abnormal external forces such as; The rope saw is clamped or pressed by the stone before it stops.

The solution

1: stable injection molding or curing quality

2: standard use

3: reduce the amount of cutting

Definition of bead taper too large

When the rope saw is used, the front end of the bead (forward direction end) wear is generally faster than the back end, there is a certain taper (< 0.2mm) is a normal phenomenon, can reflect the bead wear too fast, the rope saw service life is short.

Cause analysis,

1. The formula provided by the producer does not match the cutting object, leading to the bead wear too fast, resulting in taper;

2 cutting speed is too fast, forced cutting, resulting in rope saw beads wear faster;

3. Low cutting speed leads to accelerated bead wear

The solution

The producer shall provide the formula corresponding to the cutting object

2. Moderately reduce the cutting speed

3. Moderately increase linear speed

Eccentric wear definition

Refers to the use of rope saw process, beads did not wear along the circumferential surface evenly, but only wear a side of the beads, leading to a side of the beads wear seriously or even ground to the wire rope, and the other side has a thicker working layer, resulting in rope saw life greatly shortened, scrapped in advance.

Uniform wear mechanism

Before the rope saw is used, the wire rope will be pre-twisted 1.5-4 laps/m, and then butt, through this method, so that the wire rope stores a certain pre-twisted internal force. When used, when the rope saw rotates around the flywheel, it will be driven by the pre-torsion internal force, the wire rope rotates around the axis, driving the bead rotation, so as to achieve uniform wear. Generally speaking, the soft wire rope, such as 133 structure, because of its flow the same number of turns, the fish torsion internal force is small, so it should be appropriate to increase the number of twists. When used, the habit of large knife quantity, the number of torsion should also increase; In the middle and later period of the rope saw, the number of torsion turns should be appropriately increased due to the fatigue of the wire rope. According to experience, for the rope saws used in the domestic market, plastic and special-shaped rope saws, 61 structural steel wire rope is used to position the torsional turn number of 1.5-2/ meter, while the mine uses the rope saw, 133 structural steel wire rope, the torsional turn number is 3-4 / meter

Eccentric wear cause

1 before customer use, there is no twist at all or the number of turns is not enough;

2 The cutting quantity is too large, the bead pressure on the cutting object is too large, leading to the bead and the cutting object friction is too large, thus hindering the string moving wire rope axis rotation.

The solution

1 standard use, according to the requirements, and different use situation, before the rope saw docking will be pre-torsion;

Check the rope saw regularly during use. Once eccentric wear is found, increase the number of torsional turns after cutting. According to the conditions of partial wear, the increase is 20%-100%;

3 Reduce the amount of cutting.

Polishing definition

At the beginning of the use of rope saw, due to improper operation process, resulting in bead display layer of diamond grinding, increase the cutting resistance, refers to the normal under the knife, lose the cutting ability. The phenomenon and process of cooling water from turbidity to feeling is commonly seen in granite mining rope saw cutting large area and weak abrasive stone.

Cause analysis and solution

The linear speed is too high at the beginning of cutting

General provisions, the provincial bureau began to cut into the stone before the speed should be adjusted to address normal cutting 80%. For example, the normal cutting line speed of 25m/s should be adjusted to 20m/s at the beginning of cutting, otherwise it is easy to appear polishing phenomenon;

Adjust the linear speed to normal cutting speed after the rope saw is sunk into the stone. Adjust to normal cutting speed and increase the working current of the machine to the rated current to increase the cutting efficiency. If the wire speed is adjusted to normal and the power of the rope saw machine is not increased, the cutting speed will become slower and slower, and then the polishing will occur.

3 If the cooling water is too large, the cooling water should be adjusted to moderate