Mining a granite with a wire saw has the following advantages:
1. Wide adaptability, wire saw is suitable for all types of mines, and flame cutting is only suitable for granite mines with high quartz content and few cracks.
2. Strong function and high efficiency, first deep mining depth, can reach l0 ~ 20m or even deeper, flame cutting is generally only within 10m; second cutting speed is fast, generally can reach 3 ~ 4m2 / h, is flame cutting 2 ~ 3 Times.
3. The wire saw can cut in all directions such as vertical, horizontal, and bevel, and can also perform blind cutting, while flame cutting can only perform vertical cutting.
4. The high rate of finished products and low comprehensive cost. Firstly, the cutting surface of the wire saw is very flat and does not cause any internal damage to the blocks. Secondly, the kerf is small, only about 11mm, which will not waste resources; and the flame cutting surface is rough and uneven. It causes certain internal injuries to the blocks, and the kerf is large, generally 100 to 300 mm, resulting in a large waste of resources and high mining costs.
5. Safe and environmentally friendly, wire saw mining has no noise and no dust, does not affect nearby residents and other working surfaces, and has high degree of automation, separate control, low labor intensity and high safety; and flame cutting noise and dust are very large. It seriously affects the operations of nearby residents and other workers, and the workers are labor intensive and relatively low in safety. In summary, in today's increasingly scarce resources and soaring oil prices, the use of wire saws for the mining of granite has significant economic and social benefits.
Factors that restrict the production and application of diamond wire saws Although the use of diamond wire saws for mining mines has advantages that traditional mining methods cannot match, the application of new diamond wire saws in actual production also has a series of technical difficulties, including high sawing efficiency. Long life, low price and high reliability. The diamond wire saw is a relatively fragile and fragile system. As a circular chain, the weakest link must be strengthened as much as possible. The reliability of the diamond wire saw is a great problem. Damage to the wire saw will result in failure of the entire tool or a significant reduction in its life, which has a large impact on the design of the tool and the production of the diamond wire saw.
Today's diamond wire saw production has not been mastered by many diamond tool manufacturers. On the one hand this is due to the fact that the production of diamond wire saws is more complicated than the production of simple circular saw blades. On the other hand, the production of a suitable wire saw for sawing natural stone requires close cooperation and cooperation between the manufacturer and end users of the diamond wire saw. Various factors associated with diamond wire saws include: sawing life of beading, sawing speed of beading, spacing of beading on wire saw, mold design, life of steel rope under normal working conditions, and other technical difficulties.
(A) The most common problems 1. The most common problems encountered with wire saws that cannot be sawed and used are incorrect selection of diamonds (often used diamonds), carcass, bead spacing, mold design or incorrect application parameters. For example, we use too high a diamond density or a diamond that is too good, and its sawing performance is not very good. Diamond will not be easily broken, making it difficult to create new sharp edges.
2. The broken rope of the saw rope breaks, usually using the wrong application parameters or the quality of the saw rope is too poor, which means that the plastic/rubber and the diamond bead are not firmly combined, causing the cuttings to enter the diamond saw rope. Soon the magma or cuttings partially contacted and rubbed the steel rope between the beaded steel body and the steel rope, and the steel cord connection thread began to break, which may also be due to the wrong use of the bonding agent. Steel wire breakage may also be caused by incorrect selection of steel wire rope, beaded steel body, and poor heat treatment after injection molding.
3. Bead flaking If the beaded cut portion is peeled off from the beaded steel body, it is usually inappropriate to use the carcass or use the wrong sintering parameters. The use of an incorrect cold press process is also a cause of spalling. Sometimes, paraffin is infiltrated between the metal carcass and the beaded steel body due to improper dewaxing process. Sometimes the problem is also related to improper cleaning of the beaded steel.
4. The beading combination is not loose and the beads are loose, and the combination is not strong, which is usually a signal that causes problems during injection molding. It may also be improper use of wire rope, or contamination inside the diamond bead, improper cleaning, which will lead to poor bonding between beading and injection/molding rubber.
In general, the production of diamond wire saws is flawed. It is more demanding than the production of diamond saw blades. Like a circular chain, the production of diamond wire saws consists of many different production processes, if in a certain production process. In the event of a problem, the entire value of the diamond wire saw will be compromised. Many companies have no experience in this area, so it takes a while to have a strong foundation for a diamond wire saw with a good sawing function.
(II) Continuous improvement and progress of domestic technology In recent years, the quality and technology of diamond bead ropes produced by domestic manufacturers are steadily improving, and have reached or are close to the advanced level of imported similar products. Its main performance is in the following aspects:
First, the quality of the wire rope is improved. Because the imported high-quality steel wire rope is generally used, the problem of easy breakage of the wire rope is solved, and the durability of the bead rope is directly improved;
Second, the bead spacing maintains the quality of the material. Nowadays, high-strength plastics and rubber are widely used, which makes the beading and the steel wire ropes more firmly combined, and solves the problems of the pine beads and the beaded beads, so that the quality of the beaded rope is greatly improved.
The third is the improvement of the quality of diamond bead. Whether it is electroplated or sintered bead, its stability and wear resistance are greatly improved in cutting marble or cutting granite, which greatly improves the life of beaded rope. . The current diamond wire saw has developed a variety of products such as marble mine rope (spring fixed), granite mine rope (rubber fixed), combined rope saw rope (fixed by injection molding, used for granite board cutting), and Different cutting plans are made according to the special needs of customers.
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A typical version of an overhead garage door used in the past would have been built as a one-piece panel.The panel was mounted on each side with unequal parallelogram style hinge lifting mechanism. Newer versions of overhead garage doors are now generally built from several panels hinged together that roll along a system of tracks guided by rollers. The door is balanced by either a torsion spring system or a pair of extension springs.A remote controlled motorized mechanism for opening garage doors adds convenience, safety, and security
• Aluminum garage doors are low-cost, light, rust-proof, and feature low-maintenance. They are prone to denting because aluminum is not strong and they are energy-inefficient since aluminum is a highly conductivematerial.
• Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin. They have also polyurethane insulated base sections, or other type of foam insulation. These premium doors can match steel garage doors, and be a realistic imitation of wood (namely fiberglass units), but they may be more expensive than steel units.
• Steel doors have become common and are available in a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional insulating value. Extra strength is available with two or three layers of galvanized steel with a low gauge number (23-24 gauge steel panels).
• Wood garage doors offer aesthetic appeal, but they are high-maintenance and may be expensive. Low-priced wood garage doors may warp and break easily.
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