Manufacturing process of bushing on drill rod guide piece for hydraulic crusher
A technology of hydraulic crushing and manufacturing process, applied in the field of hydraulic crusher parts manufacturing, can solve the problems of large machining allowance and low production efficiency, and achieve the effect of shortening the manufacturing time, reducing the cost and eliminating the participation of austenite
Pending Publication Date: 2022-05-31
南阳红阳远大重工有限公司
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Problems solved by technology
At present, similar products on the market adopt the manufacturing process of forging, annealing, machining, heat treatment and grinding. In the forging process of this process route, because the bushing has a thin-walled stepped structure, solid blanks are mostly used. Integral forging, large machining allowance and low production efficiency
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[0020] In order to facilitate a clearer understanding of the content of the present invention, the present invention will be described in detail in combination with embodiments.
[0021] attached figure 1 It is an embodiment of the present invention, which discloses a manufacturing process of the bushing on the drill rod guide for hydraulic breakers, which is realized by the following steps:
[0022] 1) Hot extrusion near-net shape: Design a hot extrusion die to realize one-time extrusion molding of the blank, with a margin of 3mm for the outer circle and the inner hole;
[0023] 2) Normalizing treatment: normalizing treatment at 920°C;
[0024] 3) Full-shape outer circle for rough and finish turning: 1.3mm allowance is reserved on one side of the outer circle for rough turning, and 0.7mm allowance is reserved for one side of the outer circle for fine turning.
[0025] 4) Full shape of the inner hole for rough and finish turning: 1.3mm margin is reserved on one side of the o...
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The invention discloses a manufacturing process of a bushing on a drill rod guide piece for a hydraulic crusher, which is realized by the following steps: hot extrusion near-net forming: designing a hot extrusion die to realize one-time extrusion forming of a blank, and the allowance of an outer circle and an inner hole is 3mm; normalizing treatment: normalizing treatment is performed in an environment of 920 DEG C; rough turning and finish turning are conducted on the whole shape of the outer circle, the allowance of 1.3 mm is reserved on the single edge of the rough turning outer circle, and the allowance of 0.7 mm is reserved on the single edge of the finish turning outer circle; the whole shape of the inner hole is roughly turned and finely turned, the allowance of 1.3 mm is reserved on the single edge of the outer circle through rough turning, and the inner hole is finely turned to the size of a finished product; marking, namely etching product numbers by adopting a laser marking machine; performing heat treatment by adopting a carburizing and quenching process; subzero treatment is conducted, a gas method cold treatment mode is adopted, the treatment temperature is-196 DEG C, heat preservation is conducted for 24 hours, and accurate outer circle grinding is conducted, specifically, rough grinding and accurate grinding are conducted through a universal outer circle grinding machine. Compared with the prior art, the method has the advantages that the raw material utilization rate is increased, the manufacturing time is shortened, the cost is reduced, and the product size stability, surface hardness, wear resistance and impact resistance are greatly improved.
Description
technical field [0001] The invention relates to the technical field of hydraulic breaker parts manufacturing, in particular to a manufacturing process of a bushing on a drill rod guide for a hydraulic breaker. Background technique [0002] The hydraulic breaker is a new type of hydraulic impact machine developed in the 1960s. It mainly uses hydraulic excavators or loaders as the power source and carrier, with oil pressure as the power, and the piston reciprocates to output impact energy to do work. Hydraulic breakers are widely used in mining, secondary crushing, steel ladle and slag cleaning in metallurgical industry; equipment foundation demolition; cement pavement crushing, foundation excavation, expressway repair in highway construction; mountain opening, tunnel excavation, road and bridge demolition in railway construction ; Housing demolition, concrete crushing, water and electrical engineering construction and other fields in municipal construction. [0003] The uppe...
Claims
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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 何辉旺孙佳俊朱甲哲申增瑞刘东洋
Owner 南阳红阳远大重工有限公司