Special-shaped drill rod used for coal mining and processing technology of drill rod
A processing technology and drill pipe technology, which is applied in the field of special-shaped drill pipes for coal mining and its processing technology, can solve the problems of poor product hardness control, inability to obtain effective control, and poor product stability, so as to enhance product stability , Fast heating speed and short time effect
Active Publication Date: 2013-09-18
常熟市异型钢管有限公司
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Problems solved by technology
[0003] At present, the manufacture of these special-shaped drill pipes is formed by hot-rolling or cold-rolling forging process, which has low dimensional accuracy and cannot be effectively controlled; and its heat treatment process is completed by traditional quenching process, and the heating time is long , the product hardness control effect is poor, resulting in poor product stability, low service life and other shortcomings
Method used
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[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0025] see figure 1 and figure 2 , the embodiment of the present invention includes:
[0026] Raw materials: special-shaped drill pipe blanks made of 30CrMo after hot-rolling and cold-rolling
[0027] Equipment: cold drawing machine, automatic flow super audio frequency induction unit, cooling device
[0028] Processing technology:
[0029] 1) The special-shaped drill pipe blank made of 30CrMo after hot rolling and cold rolling is fixed on the cold drawing machine, and the hexagonal inner mold and fixed outer mold are selected;
[0030] Wherein, the hexagonal inner mold includes a head 21, a handle 22, and a tapered transition section 23 con...
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The invention discloses a special-shaped drill rod used for coal mining and a processing technology of the drill rod. The special-shaped drill rod used for the coal mining comprises a drill rod body provided with a small regular hexagon inner hole, wherein the appearance of the drill body adopts a large regular hexagon, corners of the large regular hexagon and the small regular hexagon are arc-shaped, a distance between every two opposite sides of the large regular hexagon ranges from 20 mm to 30 mm, and the wall thickness of the drill rod body ranges from 3 mm to 4mm. The special-shaped drill rod disclosed by the invention is manufactured by adopting an integrated type seamless structure and a cold drawing technology, and the size accuracy of a product can be effectively controlled; and meanwhile, a thermal refining processing for heating through automatic flowing water superaudio frequency induction is adopted, so that the heating speed is high, the time is short, the processing is simple, the effect is good, the product hardness can be improved, the product stability is enhanced, and the service life of the product is prolonged.
Description
technical field [0001] The invention relates to the field of machinery, in particular to a special-shaped drill pipe for coal mining and a processing technology thereof. Background technique [0002] Special-shaped drill pipes for coal mining are mining consumable tool accessories. The existing special-shaped drill pipes for coal mining mainly include conventional drill pipes such as round drill pipes and square drill pipes. These drill pipes have certain limitations in use. Its drilling speed, drilling efficiency and drilling performance are not as good as special-shaped drill pipes. Therefore, in recent years, special-shaped drill pipes have gradually developed. [0003] At present, the manufacture of these special-shaped drill pipes is formed by hot-rolling or cold-rolling forging process, which has low dimensional accuracy and cannot be effectively controlled; and its heat treatment process is completed by traditional quenching process, and the heating time is long , Th...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B17/00C21D1/25C21D1/42C21D9/08
CPCY02P10/25
Inventor 张根明
Owner 常熟市异型钢管有限公司