JPS6228039A - Multistep type forging press - Google Patents

Abstract

PURPOSE:To eliminate the generation of unbalanced load and to minimize an installing area by providing plural steps of forming stages in the press height direction operatably independently and by providing a die and punch at the stages center and on the same axial line to each stage. CONSTITUTION:The multistep type forging press provides a lower die 1, intermediate die 2 and the center part of the upper die 3, diesinking dies 4, 6 and punched 5, 7. In case of forging one stage is first formed with the die 4 of the lower die 1 and the punch 5 of the intermediate die 2 by driving the cylinder 8 for rolling reduction. Two stages are then formed with the die 6 of the intermediate die 2 and the punch 7 of the upper die 3 by driving the cylinder 9 for rolling reduction. The generation of the unbalanced load is thus eliminated and the installing area can be minimized as well.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a forging press that performs forming and forging in multiple stages.

(Conventional technology) ヰ FIG. 2 shows a conventional forging press.

A punch 17 and a die 16 are carved into the lower die 13 and the upper die 14, respectively, and three sets of die engravings are performed in parallel on one stage of the upper and lower die 13 and 14. Forming is then completed by forming and forging sequentially in the lateral direction from the punch 17. Reference numeral 12 indicates a frame, and reference numeral 15 indicates a pressurizing cylinder.

This method is the most common type of die forging press, and is convenient because forming is completed in two to three steps in a horizontal row on the same stage.

However, the disadvantage of this method is that when forging is performed using the die 16 and punch 17, which are the central forming mold, the load acts on the center, so no unbalanced load occurs, but when forming forging at both ends, the unbalanced load is generated. When attempting to perform die forging with high precision, satisfactory results could not be obtained.

In addition, since two to three molds are carved in one stage, the width of the press becomes large, which has the drawback of increasing the size of the press itself, and the installation area of the press also has to be increased.

(Problems to be Solved by the Invention) As described above, in the conventional multi-stage forming forging press using the same machine, multiple die-sinking is performed in parallel on the same stage,
Forming is performed sequentially from one side to the other, and there is no problem because no uneven load is applied to the center forming part, but uneven load occurs at the end of the stage, making it impossible to perform high-precision die forging. Since multiple engravings were made on the same stage, there were problems such as the overall width of the press was wide and the installation space had to be taken up.

The present invention was made in order to solve these problems, and it is possible to prevent unbalanced loads from occurring at each forming stage even in a multi-stage forming and forging press, and to minimize the installation area. The aim is to provide a multi-stage forging press that can.

(Means for Solving the Problems) Therefore, the present invention provides a forging press with a plurality of forming stages that can be independently operated in the press height direction, and in these forming stages, 7. In addition, the die and punch are arranged on the same axis, and this is used as a means to solve the above-mentioned problems.

(Operation) By operating desired cylinders of a plurality of molds arranged vertically and on the same axis, multi-stage forming forging is performed sequentially or simultaneously.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment forming the basis of the present invention.

As shown in the figure, in this embodiment, a plurality of forging stages are provided in multiple stages in the press height direction. Here, 1 is the bottom mold at the bottom, and 4 is the carved part provided at the center of the upper surface of the cough mold 1.
Reference numeral 2 denotes an intermediate mold, and a carving die 6 and a punch 5 are also provided at the center of the lower surface of the intermediate mold. 3 is an upper mold, and a punch 7 is provided at the center of the lower surface. 18 is the bottom mold 1
The hydraulic cylinder installed in the is for pushing up the intermediate mold 2,
Reference numeral 8 indicates a cylinder for rolling down the intermediate mold 2, 9 a cylinder for rolling down the upper mold 3, 10 a side frame, and 11 a lower frame.

The forging procedure according to this embodiment is to first form one step using the die-sinking part 4 of the lower die 1 and the punch 5 of the intermediate die 2, and then use the die-sinking die 6 on the upper surface of the intermediate die 2 and the punch 5 of the two-part die 3. 7
It is a two-step molding method, and can be molded in the first and second steps at the same time. In other words, the rolling down cylinder 8 may be rolled down and the rolling down cylinder 9 may be operated so that the upper mold 3 and the intermediate mold 2 can perform molding while the lower mold 1 and the intermediate mold 2 are molding. Further, independent molding using the lower mold 1 and the intermediate mold 2, or independent molding using the intermediate mold 2 and the upper mold 3 is also possible.

FIG. 2 shows an embodiment capable of "three-stage molding" corresponding to the conventional apparatus shown in FIG. 4, and three molding stages are prepared.

That is, 1 is the lower mold which is the lowest stage and the lower mount 11
A first mold engraving die 4 is provided at the center of the upper surface of the cough mold 1. 2 is a first intermediate mold corresponding to the second molding stage, and in the center of the upper and lower surfaces of the first intermediate mold,
A second engraving die 22 and a first punch 5 are provided, respectively.
Above them is a second intermediate mold 20 which is the first stage.
are provided, and a third engraving die 6 and a second punch 23 are also provided at the center portions of both upper and lower surfaces of the second intermediate die 20, respectively. Reference numeral 3 denotes an upper mold disposed at the uppermost stage, and a third punch 7 is provided at the center of the lower surface.

18 is a mold release cylinder after molding, and this cylinder 1
8 to raise the first intermediate mold 2. 9.
21 are cylinders for rolling down, and the cylinder 9 is used for rolling down the upper mold 3, and the cylinder 21 is used for rolling down the second intermediate mold 20.
Acts as a compressor.

Note that 10 indicates a side frame.

Even in the forging according to this embodiment, the final forming is performed by sequentially forming from the lower die 1 to the upper die 3. In this case as well, each step from the first step to the third step can be performed simultaneously, and in this case, it is sufficient to simultaneously lower the lowering cylinders 9 and 21.

FIG. 3 shows yet another embodiment, which, like the one shown in FIG. 2, is capable of three-stage molding, but in this example, the bottom The lower mold 1a is movable up and down by a pressurizing cylinder 19, and the second intermediate mold 20a is fixed to the side frame 10. The lower mold 1a, the first intermediate mold 2, and the second intermediate mold 20a, which are the respective stages, are carved at the center of the upper surface, and the upper mold 3, the second intermediate mold 2
0a, a punch 7 is provided at the center of each lower surface of the first intermediate mold 2.
．． 23a, 5 are provided.

In this embodiment as well, the three-step molding process can be performed simultaneously by operating the cylinders 9, 18, and 19 as appropriate.

As is clear from the drawings and their explanations, in each of the examples, the press centers are aligned on the top and bottom, so no uneven load occurs in each die, and high-precision die forging can be expected.
Furthermore, since each mold is arranged in multiple stages above and below, the installation area can be minimized on the floor, and in addition, the mold area per stage can be set to the maximum.

(Effects of the Invention) As explained above in detail, according to the present invention, since forging is always performed at the center of the press, highly accurate forging can be performed without applying an unbalanced load as in the conventional method. . In addition, since the molding die is arranged in the press height direction, 2~
Three molding processes can be performed simultaneously or sequentially, improving production capacity, and since the press width is narrow, the installation space is also small, and in addition, the mold area per stage can be maximized. It is.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a multi-stage forging press showing a basic embodiment of the present invention, Figs. 2 and 3 are schematic side views of a three-stage forging press showing various embodiments, and Fig. 4. is a schematic side view of a conventional multi-stage forging press. Explanation of main parts of the figure 1.2.3 --- Mold 4.6 --- Die 5.7- Punch 8.9.18 --- = Cylinder

Claims (1)

[Claims] A forging press is equipped with multiple forming stages that can be operated independently in the press height direction, and these forming stages are equipped with
A multi-stage forging press characterized by a die and punch located at the center of the stage and on the same axis.