Roll forging method for series toothed rail forgings of coal mining machine
A roll forging, series of technologies, applied in forging/pressing/hammer devices, forging/pressing/hammering machinery, manufacturing tools, etc., can solve the problems of fast wear, poor mechanical properties, loose structure, etc.
Inactive Publication Date: 2014-06-18
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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Problems solved by technology
[0005] The internal structure and performance of the rack are determined by different production processes. At present, the production process of the rack is mostly cast. Due to the loose structure and poor mechanical properties of the cast rack, the rack is worn under alternating pressure. faster
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[0016] The three roll forging dies in this embodiment and the assembly relationship of the manipulator on the roll forging machine are as follows: figure 1 with figure 2 as shown, figure 1 for the left view, figure 2 is the front view without the manipulator. The rack roll forging die is a roll forging die installed on a φ1000 roll forging machine. figure 1 The middle marks 12' and 12 are the upper and lower dies of the first roll forging die, 13' and 13 are the upper and lower dies of the second roll forging die, 19' and 19 are the middle rings of the upper and lower rolls respectively, 20 ' and 20 are the upper and lower dies of the third rolling die. 22' and 22 are respectively the concave ring of the upper shaft shoulder and the concave ring of the lower shaft shoulder, which are respectively used to cooperate with the first upper roller forging die notch 33' and the first lower roller forging die notch 33; the first roller forging The upper and lower concave rings ...
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The invention discloses a roll forging process, and relates to a roll forging method for series toothed rail forgings of a coal mining machine, which includes first roll forging, second roll forging and third roll forging. During roll forging, a manipulator rotates by two angles, and roll forging are performed for three times. The first roll forging method is used for roll forging of blanks so that the blanks have diamond sections. The second roll forging method includes that the manipulator rotates by 90 degrees and enters a second roll forging die, and the sections of the blanks are square after the second roll forging. The third roll forging method includes that the manipulator rotates by 45 degrees and then enters a third roll forging die after the second roll forging, and profiled grooves are formed on the square sections of the blanks after the second roll forging by means of roll forging during the third roll forging of the blanks. Roll forgings can be more similar to the forgings in shape by the aid of the roll forging process, so that the forgings needing larger deflections can be formed on an existing press of a smaller tonnage by means of die forging, a larger roll forging machine is no longer needed to be purchased, and economic cost is saved.
Description
technical field [0001] The invention relates to a roll forging process of a coal machine series rack forgings, especially a roll forging manipulator that rotates different angles twice in the three-pass roll forging process to change the cross-sectional shape of the roll forging blank Roll forging process. Background technique [0002] With the mechanization of auxiliary transportation in coal mines, the requirements for auxiliary transportation systems and equipment are getting higher and higher. High-efficiency, high-speed, heavy-duty auxiliary transportation systems and equipment are getting more and more attention in today's rapid development of coal mines. [0003] As the main component of the chainless traction shearer, the rack plays an important role in traction of the coal machine. Due to the fatigue spalling and damage caused by the alternating contact pressure and long-term repeated action of the rack, the noise and vibration of the rack will increase, and the we...
Claims
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IPC IPC(8): B21J5/02B21J13/10
Inventor 蒋鹏胡福荣余光中伟韡杨勇曹飞
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH