Dredging pump impeller casting processing technology
A processing technology and casting technology, applied in the field of casting and processing technology of mud pump impeller, can solve the problems of increasing ship cost and crew labor intensity, reducing ship running time and creating efficiency.
Active Publication Date: 2017-06-13
CCCC TDC ENVIRONMENTAL PROTECTION DREDGING
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AI Technical Summary
Problems solved by technology
Therefore, the ship frequently replaces the dredging pump impeller and other flow-passing parts in the maintenance of the dredging pump, resulting in "two increases and two decreases" in the operation of the ship, which increases the cost of the ship and the labor intensity of the crew, and reduces the operating time and efficiency of the ship.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The casting process of the mud pump impeller of the present invention comprises the following steps:
[0026] a) Determine the casting process parameters, determine the dimensional error and machining allowance of the non-machined surface according to the processing size, determine the gating system, set the gating system to two, and determine the number and position of the riser; casting reference "Casting Dimensional Tolerance and Mechanical Machining Allowance" (GBT6414—1999) standard, the maximum processing amount of the outer circle is 10mm, the processing amount above the parting surface is 10mm, and the processing amount below the parting surface is 6mm; due to the large size of the casting, only one gating system will make the Due to the relatively long distance of the pouring material, the temperature drops a lot, and it is easy to cause defects such as insufficient pouring, and the temperature distribution in the mold is not uniform enough, and it is easy to ca...
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Abstract
The invention discloses a dredging pump impeller casting processing technology and relates to a casting technology. The invention provides the dredging pump impeller casting processing technology. The casting processing technology has the advantages of simple processes and workpiece corrosion and wear resistance. The casting processing technology comprises determining casting parameters, processing a mold, carrying out molding, carrying out pouring based on two pouring systems, and carrying out boxing, cleaning, annealing, secondary cleaning, rough machining and heat treatment, wherein the heat treatment process comprises annealing at an annealing temperature of 880-890 DEG C for 9-11h, the secondary cleaning process comprises carrying out annealing cooling to 280 DEG C, taking out the workpiece, carrying out air cooling and then carrying out cleaning, and the rough machining and heat treatment process comprises carrying out rough machining on the workpiece, carrying out quenching at a quenching temperature of 860 DEG C for 2h, carrying out air cooling, carrying out tempering at a temperature of 230 DEG C for 2h and then carrying out air cooling.
Description
technical field [0001] The invention relates to a casting process, in particular to a casting process of a dredge pump impeller. Background technique [0002] As the core part of the pump product, the impeller plays an important role in the performance of the pump and the reliability and life of the whole machine. Since the development of pump products in our country, the casting process of the impeller has been produced by the sand casting process with wooden molds. In recent years, with the water glass casting technology and investment casting technology, the casting technology has developed more and more mature. However, the structure of the impeller is complicated, especially the three-dimensional structure of the blade, which makes the casting process of the impeller develop slowly, and it is difficult to use the precision casting technology in the casting process of the impeller. [0003] The dredger is the key component of the dredger. During the construction of the...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B22C9/22B22C9/08C21D1/26C21D1/18C21D5/00C21D9/00
CPCB22C9/082B22C9/088B22C9/22C21D1/18C21D1/26C21D5/00C21D9/0068C21D2211/001C21D2211/008
Inventor 宋维福
Owner CCCC TDC ENVIRONMENTAL PROTECTION DREDGING