Processing method for full hydraulic drilling machine three-layer structure oil distribution sleeve
A three-layer structure and processing method technology, applied in the field of mechanical design, can solve the problems of oil distribution sleeve and spindle locking failure, high production cost, gap change, etc., to avoid locking failure, reduce use, and reduce deformation Effect
Pending Publication Date: 2019-03-01
CHINA COAL TECH ENG GRP CHONGQING RES INST
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Problems solved by technology
In the patent application No. 201010574604.9 "Processing method of bimetallic oil distribution sleeve of full hydraulic drilling rig", the metal mold is first used to cast a copper alloy inner sleeve blank with dense structure and excellent comprehensive performance on a vertical centrifugal casting machine. The vacuum sintering process organically welds the copper alloy inner sleeve blank with the carbon steel substrate to form a bimetallic oil distribution sleeve; this method needs to process the semi-finished copper alloy inner sleeve first, and then press it into the carbon steel substrate, so The copper alloy inner sleeve obtained by casting should not be too thin, because the casting is too thin, and it is easy to deform during processing and pressing. The thermal expansion coefficient of the alloy steel of the main shaft is different. The thermal expansion coefficient of the copper alloy is greater than that of the alloy steel. If the copper alloy inner sleeve is thicker, the temperature will affect the matching size of the copper alloy inner sleeve and the drill spindle during the working process. Larger, it is easy to cause a large change in the gap, which makes the oil distribution sleeve and the main shaft lock invalid; at the same time, the preparation of a thicker copper alloy inner sleeve requires more precious metal copper, and the production cost is high
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Embodiment 1
[0032] The processing method of the three-layer structure oil distribution sleeve of the full hydraulic drilling rig provided in this embodiment includes the following steps:
[0033] a. Cast a layer of copper alloy layer on the inner wall of the inner steel sleeve through the centrifugal casting process. The specific process is as follows:
[0034] First fix the inner steel sleeve in the casting mold of the centrifugal casting machine, preheat it to 800-810°C, and keep it for 15 minutes to ensure that the temperature in the furnace is consistent with the temperature of the inner steel sleeve, and then put the liquid copper at a temperature of 1100-1150°C The alloy is poured into the casting mold at a speed of 2.5kg / s, and the casting mold is started to rotate. Within 10s, the rotating speed increases to n r / min, and keeps for 130~150s; after the casting is completed, the acceleration is -2~-0.3rad / the s 2 Reduce the rotation speed until the liquid copper alloy is completely...
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Abstract
The invention provides a processing method for a full hydraulic drilling machine three-layer structure oil distribution sleeve. The processing method comprises the following steps that a, a centrifugal casting technology is used for casting a copper alloy layer on the inner wall of an inner steel sleeve; b, an outer steel sleeve and the inner steel sleeve with the copper alloy layer are firmly sintered together through a pressurizing vacuum sintering process to form an oil distribution sleeve body comprising the outer steel sleeve, the inner steel sleeve and the copper alloy layer from outsideto inside in sequence; and c, the oil distribution sleeve body obtained in step b is subjected to finish machining, an oil distribution hole and a balance hole are formed in the side wall of the oildistribution sleeve body, an annular pressure equalization groove is processed circumferentially in the inner wall of the copper alloy layer, and a three-layer structure oil distribution sleeve product can be prepared. By means of the method, the oil distribution sleeve with the thin copper alloy layer can be prepared, the thickness of the copper alloy layer cannot exceed 1 mm, the deformation amount of a copper alloy material due to temperature change is greatly reduced, and locking and efficiency losing of the oil distribution sleeve and a main shaft are effectively avoided; and meanwhile, the production cost is reduced.
Description
technical field [0001] The invention relates to the field of mechanical design, in particular to a processing method for a three-layer structure oil distribution sleeve of a full hydraulic drilling rig. Background technique [0002] At present, the oil distribution sleeve used on the full hydraulic power head drilling rig to realize oil distribution for the hydraulic chuck of the drilling rig adopts a bimetallic structure made of carbon steel and copper. In the patent application No. 201010574604.9 "Processing method of bimetallic oil distribution sleeve of full hydraulic drilling rig", the metal mold is first used to cast a copper alloy inner sleeve blank with dense structure and excellent comprehensive performance on a vertical centrifugal casting machine. The vacuum sintering process organically welds the copper alloy inner sleeve blank with the carbon steel substrate to form a bimetallic oil distribution sleeve; this method needs to process the semi-finished copper alloy...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B22D19/08B22D19/16B22D13/04B23P15/00
CPCB22D13/04B22D19/08B22D19/16B23P15/00
Inventor王志锦马振纲邱响林田乐意蒲剑阮绍刚李和祥史春宝罗华杜渔舟陈龙周涛李学忠蒋开勇
OwnerCHINA COAL TECH ENG GRP CHONGQING RES INST