JPS63286234A - Burr trimming method for die forging article - Google Patents

Abstract

PURPOSE:To prevent a deformation and bend by holding a die forging article with the receiving die energized by projecting from the through hole of a cutter die, descending the press die arranged in opposition to those by pressing with the larger force than the energizing force of the receiving die and trimming it by the press die and cutter die. CONSTITUTION:A die forging article is mounted on the receiving die 15 energized by projecting from a cutter die 11 by the manipulater 24 for changing. The burr of the die forging article is cut with this press die 17 and cutter die 11 by descending the press die 17. At this time a pressure is given to the receiving die 15 by a trimming cylinder 16, but the press die 17 is descended with larger force therefrom. The press die 17 is then ascended and the receiving die 15 is ascended to the original position, so the die forging article is mounted on a truck 26 by a manipulater 25. Due to the burring work being executed in the state of constraining the die forging article by the press die 17 and receiving die 15 the displacement and bend due to thickness reduction are prevented and the dropping downwards is not caused, hence no bruise nor dimple are generated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for deburring die forged products.

(Prior Art) As a method for deburring die forged products, a deburring method has conventionally been generally adopted. In this extraction method, as shown in Fig. 3 (a), the die forging 1 to be deburred is placed directly on the cutter die 2, and then the die is pressed into the die as shown in Fig. 3 (b). 3 is lowered with a required pressing force to remove burrs. At this time, the deburred die forging 1 falls downward from the through hole 4 provided in the cutter die 2.

(Problems to be Solved by the Invention) However, in the conventional deburring method as described above, the posture of the die forged product on the cutting die becomes unstable due to die wear of the finishing die, etc. There was a problem that it could not be done. In addition, because the die forgings are not restrained during deburring, deformation and bending occur in the die forgings.Furthermore, after the deburring process, the die forgings are forced to fall onto a conveyor, etc., resulting in bumps and corridors. There was also the problem.

The present invention has been made in view of the above-mentioned problems.1. It is an object of the present invention to provide a method for removing burrs from die forged products, which can prevent deformation and bending during deburring, as well as prevent the occurrence of bumps and corridors.

(Means for Solving the Problems) When deburring a die forged product, the present invention supports the die forged product with a receiving die that is always biased to protrude from the through hole of the cutter die. After that, a press die placed above and facing the receiving die and the cutter die is pressed down with a force greater than the biasing force of the receiving die, and the die forged product is restrained by the press die and the receiving die. This is a method for removing burrs from die forged products, the gist of which is to remove burrs from die forged products using a press die and a cutter die.

(Embodiment) The present invention will be described below based on an embodiment shown in FIGS. 1 and 2.

In the drawing, reference numeral 11 denotes a cutter mold attached to the upper surface of the press bed 12 via a bolster 13, and a receiving mold 15 is inserted into the through hole 14 of the cutter mold 11 by a holding cylinder 16 installed below. It is arranged so as to always protrude from the cutter mold 11.

Reference numeral 17 denotes a press die disposed above the receiving die 15 and the cutter die 11 to face them, and the press die 17 is attached to an upper bolster 18. A burr removing plate 19 is attached to the outer periphery of the press die 17 so as to be movable relative to the press die 17 by means of a burr remover cylinder 20. Note that 21 in the figure is a guide stone.

Then, the deburring operation of the die forging is performed as follows using the deburring press device configured as described above.

First, the die forged product 2 transported by the delivery cart 22
3 is placed on the receiving mold 15 which is biased and held by the loading manipulator 24 so as to protrude from the cutting tool mold 11. At this time, since the receiving mold 15 is formed in the shape of the die forged product 23, its posture when placed is stable.

Next, the press die 17 is lowered and the burrs on the die forged product 23 are cut off by the press die 17 and the cutter die 11. At this time, a required pressure is constantly applied to the receiving die 15 by the holding cylinder 16, but in order to lower the pressing die 17 with a pressing force greater than this pressure, the die forged product placed on the receiving die 15 is 23 gradually descends together with the receiving die 15 and finally penetrates into the through hole 14 of the cutter die 11. At this time, the burr is cut by the knife die 11 and the press die 17. Note that the pressure applied by the lifting cylinder 16 is selected to be a pressure that can correct distortion and that does not reduce the die forging 23 due to the descent of the die 17.

That is, in the method i of the present invention, when deburring the die forged product 23, the die forged product 23 is placed between the press die 17 and the receiving die 1.
5, it is possible to prevent deformation or bending due to shrinkage.

Finally, when the press die 17 is raised, the receiving die 15 is raised and returned to its original position by the action of the deburring cylinder 16, and in this state, the take-out manipulator 25 is activated to remove the burrs from the deburred die forging. Cart 26 to carry out the product 23
It is placed on top.

That is, in the method of the present invention, the deburred die forging 25
Since it is located above the cutter die 11, the workability of transferring die forged products is good, and no bumps or corridors occur.

Incidentally, as a result of implementing the method of the present invention, the conventional shaping process could be omitted due to a reduction in the incidence of bending during deburring (about 50%). In addition, the delivery accuracy of die forged products is improved, and it can also contribute to automated transportation before and after deburring.

(Effects of the Invention) As explained above, in the method for removing burrs from die forged products according to the present invention, when removing burrs from die forged products, the die forged products always protrude from the through hole of the cutter die. supported and held by a receiving die biased as such, and then pressing and lowering a pressing die placed above and facing the receiving die and the cutter die with a force greater than the urging force of the receiving die; Deburring is performed using a press die and a knife die while the die forged product is restrained by the press die and the receiving die.The posture of the die forged product is stabilized because the die forging is supported and held by the receiving die. Further, during deburring, deburring is performed while the die forged product is restrained by the receiving die and the press die, so deformation and bending do not occur. Furthermore, since the die-forged product after deburring does not fall downward, there are no bumps or corridors, so this invention has great effects.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the method of the present invention, in which (a) shows the time of carrying in the die forging, (b) shows the lower limit of the press, and (c) shows the upper limit of the press,
FIG. 2 is a schematic diagram of a deburring press used in the method of the present invention, and FIGS. 3(a) and 3(b) are the same drawings as FIGS. 1(a) and (b) for the conventional method. 11 is a knife mold, 14 is a through hole, 15 is a receiving mold, 16 is a holding cylinder, and 17 is a pressing mold.

Claims (1)

[Claims] (1) When deburring a die forged product, the die forged product is supported and held by a receiving die that is normally biased to protrude from the through hole of the knife die, and then the said receiving die and the knife die A press die placed in an upper position facing these is pressed down with a force greater than the biasing force of the receiving die, and the die forging is restrained by the press die and the receiving die, and deburring is performed using the press die and the knife die. A method for removing burrs from die forged products.