A combined die for crank die forging
A die forging and cranking technology, applied in forging/pressing/hammer devices, forging/pressing/hammering machinery, manufacturing tools, etc., can solve the problems of reducing production efficiency, increasing manufacturing costs, increasing working hours, etc., to improve production. Efficiency, reduction in usage, saving man-hours
Active Publication Date: 2022-07-15
CHINA FIRST HEAVY IND +1
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Problems solved by technology
The main journal hole blank removed by punching or other processing methods occupies 1 / 3 to 1 / 4 of the overall weight of the crank throw blank forging, which not only consumes a lot of materials, but also increases manufacturing costs, and also increases man-hours and reduces production efficiency
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[0025] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0026] In the description of the present invention, it should be understood that the forward direction of "X" in the accompanying drawings represents the right side, and correspondingly, the reverse direction of "X" represents the left side; the forward direction of "Y" represents the front side, and accordingly, The reverse of "Y" represents the rear; the forward direction of "Z" represents the upper side, correspondingly, the reverse side of "Z" represents the lower side, and the orientation or positional relationship indicated by the terms "X", "Y", "Z", etc. is Based on the orientation or positional relationship shown in the drawings in the description, it is only for the convenience of describing the present invention and s...
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Abstract
The invention provides a crank-turn die forging combined concave die, which relates to the technical field of forging dies, comprising an inner die and a first insert, the inner die is provided with a cavity matching the contour shape of a marine crank, and the first insert is suitable for It is connected with the side wall of the mold cavity and extends into the mold cavity to form the main journal hole of the marine crank. During the die forging process of the present invention, when the punching tongue plate moves downward to punch the crank blank forging, a groove is formed on the crank blank at the position corresponding to the first insert, and the groove is continuously elongated and directly formed. For the required main journal hole, a blind hole matching the shape of the main journal hole is formed on the crank crank blank forging, which can not only reduce the amount of blanks and reduce the manufacturing cost, but also make the crank crank blank forging for the subsequent use of the boring machine. The finished main journal hole has a specified drilling range, which can improve the machining accuracy of the main journal hole, save man-hours and improve production efficiency.
Description
technical field [0001] The invention relates to the technical field of forging dies, in particular to a crank-blade die forging combined concave die. Background technique [0002] Marine cranks are the core components for large ships to transmit power and motion, but my country's marine crank forgings have long relied on imports. The high utilization rate of crank forgings leads to high costs, which is the fundamental reason why domestic enterprises are difficult to compete with Japanese and Korean enterprises. . Marine cranks generally include main journal holes, connecting rod journals, first shoulders, second shoulders, crank arm conical surfaces and crank arms, etc., which transmit large power and bear alternating loads, which are not allowed during the life of the ship. Therefore, the strength, fatigue resistance, impact resistance and other properties of marine cranks are very demanding, and they are usually forged by large presses and crank forging dies. At present, ...
Claims
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IPC IPC(8): B21J13/02B21K1/08
CPCB21J13/02B21K1/08
Inventor 温瑞洁王宝忠刘颖杨晓禹冯永亮周岩
Owner CHINA FIRST HEAVY IND