KR970069185A - CRANK SHAFT's moderate cooling exclusion continuous shear line forging method and apparatus - Google Patents

Abstract

The present invention relates to a method and an apparatus for continuous cooling of a crankshaft in a continuous shear shaft type forging, and a method of manufacturing a forged round bar by grooving without a cooling method and heating up to nine crank throws at once without intermediate reheating, While maintaining the merits of the continuous shear line type, which is an advantage of the forging method, the middle cooling method and the grooving method are included in the forging method, thereby shortening the construction period and increasing the compatibility of the die, It consists of a round bar forging process, a groove forging process for forming a groove in a heated round bar, a forging process for forging the crank throw, a post-process and heat treatment process, a material inspection, and a sulfur / finishing process The groove forging method is a method in which two inserts A second heated round bar is inserted between the bars for forging, and then the two grooves are forged simultaneously. Then, the grooves are forged one by one on the basis of the forged grooves, and the crank shaft throw portion is formed and the eccentric portion is filled And the groove presses the side press die and the side press die to hold the grooved groove of the round bar to the right and left and to hold the portion that is pushed when the divider descends to the lower side. The push-pull device, which is a hydraulic device that allows the adjustment of the round bar, and the saddle which acts as a guide rail to drive the side press die forward and backward, and the vertical pressure received from the press to horizontal pressure And cut with a side press die, A top press die that acts as a guide to prevent the deformation and damage of the swage dies and allows the divider to vertically enter the upper part. It is fixed to the upper anvil of the press and can be finished with forging work with only the manifold without a crane. It is mounted on both ends in order to maintain the vertical and parallelism of the crankshaft. It can be used for both longitudinal stretching and longitudinal stretching in order to maintain the vertical and parallelism of the crankshaft. A bending protector for fixing the bending protector and a bending protector for preventing bending, a fixing pin for preventing a moment acting on the bending protector and the bending protector base, and an angle plate And tables of presses And a base plate that is fixed to the base plate and supports the entire die. Groove forged round bars are inserted into a die to mold up to nine crank throws with one heating at a time without intermediate reheating. First, the forged reference plane is brought into close contact with the angle plate to make forging, and the pin portion of the throat is filled with the void space of the side press by the divider made round the end portion to reduce the machining allowance. , It is possible to reduce the manufacturing cost of the crankshaft, and the intermediate cooling method and the grooving method can be replaced by the monotone method. Therefore, the working time can be greatly reduced and the air can be shortened by 10 days. Feature to import Crank intermediate cooling stage ryuseon excluded continuous form type forging method and apparatus of the shaft that.

Description

CRANK SHAFT's moderate cooling exclusion continuous shear line forging method and apparatus

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a schematic view of a manufacturing method of a crankshaft according to the present invention, FIG. 2 is a round bar forging method and a forging die (DIE) according to the present invention, FIG. 3 is a groove forging method and a forging die . Figure 4 is a perspective view of the combined section of Figure 3;

Claims (6)

Round bar forging method for round forging of first heated ingot, Groove forging method for forming grooves in heated round bar, Forging method for forging crank throw, Post treatment and heat treatment method, Material inspection and Sulfur / Finishing method Wherein the crankshaft is provided with a plurality of grooves formed in a circumferential direction of the crankshaft. The method of claim 1, further comprising: In the groove forging method, a second heated round bar is inserted into a grooved forging die in which an insert is inserted into grooves in a round bar forging, two grooves are simultaneously forged, and a round Wherein the grooves are continuously forged one by one in a bar. The method of claim 1, further comprising: In the mold forging method, a groove forged round bar is inserted into a mold die, a maximum of nine crank throws are forged at one time without intermediate reheating, and the angle of each step is adjusted by first closely contacting the forged reference plane with the angle plate And the fork of the throat is formed by a divider having a rounded end portion so as to fill the void space of the side press to reduce the machining allowance and to form a continuous shear line. Shaft midway cooling exclusion continuous shear line forging. And a die for forming a groove in the round bar and a die for forming a groove in the round bar and a die for crankshroud-type forging the heated ingot to a desired diameter of the round bar. Forgery - type forging. 5. The method of claim 4, Wherein the grooved forging die is used by inserting and mounting two inserts in a round bar forging die. 5. The method of claim 4, The die is formed by a divider that forms a crankshaft thrown portion and serves as a pressurizing portion for filling the eccentric portion, and a portion of the grooved round bar which is fixed when the divider moves downward The push-pull device, which is a hydraulic device that allows the side-press die and side-press die to be pulled forward and backward to freely control the round bar, and the saddle that serves as the guide rail to drive the side- A top press that is secured to the upper anvil of the press and converted to horizontal pressure by the vertical pressure received from the press to transfer it to the side press die and prevent the change and damage of the side press die and to guide the divider vertically into the upper part accurately. And die It is fixed to the upper anvil of the press and can be finished with the Manipureuta only without a hoisting machine such as a crane. It can be divided into two upper and lower for the separation of the round bar, to prevent the banding during forging by matching with the pre- A bending protector base mounted on both ends of the bending protector for preventing vertical and lateral bending of the bending protector and a bending protector for fixing the bending protector, And a base plate fixed to the table of the press and serving to support the whole of the die. The crankshaft of claim 1, wherein the crankshaft Cooling Exclusion Continuous Ryuseon-forming forging device. ※ Note: It is disclosed by the contents of the first application.