Investment casting can make use of most metals, most commonly using steel alloys, carbon steel,stainless steel, and tool steel. This process is beneficial for casting metals with high melting temperatures that can not be molded in plaster or metal. Parts that are typically made by investment casting include those with complex geometry such as turbine blades or firearm components. High temperature applications are also common, which includes parts for the automotive, aircraft, and military industries. Investment Casting,Investment Casting Materials,Impeller Investment Casting,Wax Investment Casting Ningbo City Yinzhou Ruican Machinery Co.,Ltd , https://www.ruicanmanufacturer.com
Mine tunneling technology is a comprehensive applied science. The recent development trends of its main process technologies and equipment can be summarized as follows:
( 1 ) The ordinary tunneling method of the roadway with rock blasting as the main means will still be the main method of tunneling for a considerable period of time in the future. However, the turf drilling method has been greatly developed, and it is expected to become the main method of tunnel excavation in the next 10 years or so;
( 3 ) The method of tunnel excavation will be developed in addition to the full-section drilling method. The underground small-diameter drilling rig will be developed with deep hole section blasting method. The culverting method will be obtained in the excavation high and blind patio. With more adoption, the proportion of the hanging tunneling method will be reduced, and the conventional tunneling method will be gradually eliminated in large and medium-sized mines;
( 4 ) While improving the productivity of single equipment, perfecting the matching of excavation equipment and forming a high level of excavation mechanized operation line, it has shown obvious superiority and development trend;
(5) During the construction process technology, and smooth blasting technology in the increasingly taken seriously, and will focus on drilling and blasting process is mainly to increase the depth of the blast hole, drilling machine with a reasonable selection, drilling and blasting parameters and enhance the explosive power etc. The work to improve the cycle footage, the blasthole arrangement and the charge will be standardized on the basis of rock blasting grading, and then the electronic computer will be used to optimize the selection of rock blasting parameters; anchor spray support and grouting and water shutoff Technology will be developed rapidly.
Our products cover a wide range of industries including train & Railway, automobile & Truck, construction machinery, mining machinery, forklift, agricultural machinery, shipbuilding, petroleum machinery, construction, valve and pumps, electric machine, hardware, power equipment and so on. We are capable to produce products according to customers' drawings or samples, we focus on both carbon steel and alloy steel. Up to today, more than 100 raw materials and 5, 000 kinds of different products have been developed and produced by us. We are familiar with the material standards of many countries, such as Chinese GB, American ASTM, AISI, German DIN, French NF, Japanese JIS, British BS, Australian AS and Association of American Railroads (AAR ) and other industrial standards.
The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 3 tons and aluminium castings of up to 100 kg. It is generally more expensive per unit than Die Casting or Sand Casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.
Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Blades produced by investment casting can include single-crystal (SX), directionally solidified (DS), or conventional equiaxed blades. It is also widely used by firearms manufacturers to fabricate firearm receivers, triggers, hammers, and other precision parts at low cost. Other industries that use standard investment-cast parts include military, medical, commercial and automotive.
Investment casting offers high production rates, particularly for small or highly complex components, and extremely good surface finish (CT4-CT6 class accuracy and Ra1.6-6.3 surface roughness) with very little machining. The drawbacks include the specialized equipment, costly refractories and binders, many operations to make a mold, and occasional minute defects.
Material:
Alloy Steel:ASTM 430;ASTM410;ASTM 416,ect.Carbon
Steel:WCB,AISI1020;AISI1045;S355J2G3,S235JR,ect.
Stainless Steel:SS304;SS316;SS316L;17-4 PH;ect.Copper:C21000;C26800;C27000;C27200,ect.
Advantage
Can form complex shapes and fine details Many material optionsHigh strength partsVery good surface finish and accuracyLittle need for secondary machining
Applications:
Turbine blades, armament parts, pipe fittings, Lock Parts , handtools, agriculture parts,Marine Parts,medical parts,hardware,automobile parts,ect.
Problems and development trends in the roadway engineering
At present, there are mainly problems in the mine shaft and roadway engineering, such as average speed and average work efficiency, high cost, poor engineering quality, and long construction period of mine engineering. The reason is that the management system is in urgent need of reform and the quality of the construction team is not high enough, mainly because the equipment quality is not high, the efficiency is low, the supporting level of mechanical equipment is not high, the cycle footage is small, the excavation support technology and the day of the soft rock layer The rapid ventilation technology of inclined shafts and long roadways needs to be improved.
( 2 ) In the common method of shaft excavation, the deep shaft excavation is mainly oriented towards large (increased equipment production capacity, large-capacity grab rock machine, large bucket, large winch, high-power suspension equipment), deep (medium-deep) Hole blasting), multiple (multi-machine rock drilling, multi-layer hanging plate), flat (digging, bricklaying parallel operation) direction development; shallow well drilling is moving towards light, less, convenient direction, that is, equipment should be light and quantity Less, moving is convenient. At the same time, the auxiliary work is mechanized;