JPS6221439A - Rotary forging device - Google Patents

Abstract

PURPOSE:To enable a forging with good accuracy by giving a big press force by forming the press face of the upper and lower dies in a conical face, by arranging those axial lines to incline respectively for the work center axial line and by repeating the forging operation with the rotary deformation of the forging deformed part by the rotation of the lower die. CONSTITUTION:The lower die 11 is fitted to a rotary base 22 by arranging a rotary base 22 on the lower backing base 21 by inclining the axial line A-B for the vertical working center axial line C-C by the inclination (alpha2) equivalent to the conical bus angle (alpha1) of the press face of the lower die 11. The rotary base 22 is then made drivable with rotation by a motor 27 around the axial line A-B. The upper die 13 is fitted as well to a press intermediate panel 16 by inclining at the angle (alpha2') for the press center axial line C-C and with its descent a rolling reduction force is applied on a forging stock 10A via the upper die 13. And in case of the forging the upper die 13 is ascended, the rotary base 22 is rotated and the following rolling reduction is performed by rotating the base 22 until the following lower die working face of the forging stock 10A is removed from the preceding working face.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a 7-lung member with a shaft such as a large m exhaust valve for the chest of a one-day μ aircraft, and a jet engine axial flow pressure # aircraft.

This invention relates to a new type of rotary forging device that can advantageously produce koji forged products such as boss-equipped seven-lunge padding materials such as disk materials.

(VE rice technology) There is a detailed report on the conventional co-rotating forging machine and forging force method in the literature of the 1st century.

Plasticity and processing Kubo et al., 14-151 (1975-8)
, 548 Footwear and processing Kobayashi et al., 21-255 (198
0-8), 670 Figure 7 shows a typical example of a conventional rotary forging machine.
Give an example. The lower mold (1) is a ram type hydraulic press (J IIC
The upper die (8) is positioned nearer to the upper die (8) so as to be rotationally displaced from the rotary drive unit (4)K. The main shaft (5) integrated with the upper mold (8) is at an angle (
→Since it rotates around the axis in an inclined state, the machining load acting on the top m (!l) of the tip of the spindle is transferred to the hemispherical spherical seat (
6) is supported by 72. The center of curvature of this spherical seat (6) coincides with the apex of the conical shape of the upper die (8).

The main shaft (5) of the top (8) is connected to the Fi Taishin unit (7), and the alignment unit (υ) is connected to the gear (8) by the electric motor (8).
9) Rotate around the machining center line (0-0) while maintaining the Kfx oblique posture by rotating through meshing. Figure 8 shows the operating mode of conventional forging using a rotating forging machine. The forging material (end) on the lower die (1) is pressed up by the hydraulic press (2) toward the conical upper die (3) which rotates in an inclined position as shown in FIG. This is a forging method that forms odd-shaped products through the accumulation of continuous changes. In the forging final stage, referring to Fig. 5 1, the upper die (
Since the deformation area (a) affected by 8) is small, a forged material of a large shape can be formed with a small load and small equipment compared to the conventional press forging method using metal turning. In an actual example, the forming of a forged material that required a pressure of 4000 tonf in normal press forging was
00tonf'''C, and exhibits 10 times the capacity.

Therefore, equipment costs can be reduced and mold waste can be saved, making it suitable for high-mix, low-volume production. Since there is no other impact, there is less environmental pollution.

(Problems to be Solved by the Invention) Rotary forging is a theoretically advantageous forming method as described above, but the following problems remain unsolved in the prior art.

(mouth) Forming pressure 'fc T-work supported by a rotating spherical seat.

The ball seat has high surface pressure and is not +1. When the diameter and size of the ball seat are increased, it becomes difficult to maintain accuracy.

Layer c) Since the amount of upsetting per unit time is smaller than normal press forging, it is not suitable for forming products that require a large amount of upsetting.

(ml J: A product with 6 surface 1c59 protrusions is difficult to mold in the same rotation unless a large slope is provided.

(5) The lower surface of the disk part of the finished product is in static contact with the lower mold, and only the upper mold swings, so the upper surface! 11K has a large trained young fruit, but the lower part is less troubled [Only young fruit is received, and there is a difference in material properties between the upper and lower surfaces.

Due to this reason, in the conventional technology, the diameter or length is 10
Product f with dimensions of about 0W or more: E@It was difficult to forge.

The present invention eliminates the need for a rotating spherical seat, which is a central component of a conventional rotary forging machine, and eliminates the limitations of the rotary forging machine.
Created a rotary forging device that enables the forming of Fukunji material with a shaft, etc., and that gives the same contact area of the upper and lower dies to the upper and lower surfaces of the disc-shaped part during rough VC forging. The purpose is to

(Means for solving the problem 2 effects, examples) Above!
One issue is 5. According to the present invention, the upper and lower press Tki
are formed into a conical shape, and their axes are arranged in the same radial direction with an inclination angle equal to the conical generatrix of each press surface with respect to the processing center axis. Given an arrangement where the conical matrix a on the press surface is perpendicular to the machining center axis, ? - Under the arrangement, the lower die is supported rotatably around an inclined axis at a constant height position, and the upper die is attached to the middle of the press that descends relatively in the direction of the processing center, and the forging is performed between the upper and r dies. The rotary forging apparatus is constructed in such a way that a pressing force is applied to the material.The following is a detailed explanation of the present invention with reference to FIGS. 1 to 6.

FIG. 1 shows the principle and geometric configuration of the rotary forging apparatus of the present invention.

The press surface (6) of the lower mold 91 has a machining center axis < 0-0
>It is formed into a 5-pyramid shape with a conical generatrix angle (αθ) with the apex (A) on the top. It is arranged inclined with an inclination angle (al) equal to the angle (al), and in the 41 radial direction of inclination, the press surface conical generatrix (mu-D) is located at the machining center a
It is perpendicular to <OO>.

The upper die also has a conical generatrix angle (α , >Ic equal angle (αs) 'ft, the VC is arranged in the radial direction of the machining center axis (0-0) in the same direction as the axis (A-E), and inclined in the opposite direction to the direction of the machining center axis, In the direction of inclination in the production direction, the press surface conical matrix !I (A'-D) is the machining center line (o
It is perpendicular to -o) and parallel to that of the lower mold. Angle (α
1) (*Hatake) (α1'n (α is usually in the range of 2 to 109. For specific purposes, it may be set to α3-0° with no inclination.

Based on the geometrical arrangement, the lower mold (B) is supported at a certain height so as to be able to rotate around the axis (A-B), and the upper part (to) is supported by the support base (B). The press is repositioned to the middle m (to) where it descends in the direction of the machining center axis relative to the lower mold through.

In this way, the press middle plate (end) is lowered and the forging material α1 is subjected to downward pressure of the parallel conical press between the press surfaces of the lower die (b) and the upper die. With this structure, the forged material is subjected to a press reduction force t- under equal conditions on the upper and lower surfaces of both the upper and lower dies.

The middle part of the press is pulled back to remove the pressing part of the forged material, and then the lower mold is rotated, and the part that was hit by the previous pressing is moved from the position directly below the upper mold base a(^-D'). The middle of the press is lowered again and a rolling force is applied to the part where it contacts the previous rolling part.This process is repeated to perform rotational forging over the entire circumference of the forged material.

-1-81 Fig. 2 The 7' material (IOA) with a lotus "" is set at an angle (αS) of the axis (A-D) with respect to the forging center axis (0-0).
) The lower die 0 is mounted on the rotary table 4. There is a guide hole (C) into which the lower support fits into the center protrusion (on the base) and a guide hole (c) into which it fits into the rotating table.
This alignment allows the turntable to move along the tilt axis (A-B).
It is rotatably supported around the 2) The bearing plate between both Fi is ruru.

The rotary table works through the meshing of the gear attached to the rotary table (2) and the pinion attached to the hydraulic motor.

The lower mold a is driven to rotate.

The rotational force of the hydraulic motor (2) is generated by the rotation WB# and the lower mold (
b) It is sufficient to have enough strength to rotate the forged material (10mm) placed on top.

When using the upper mold, the axis line (^-
B') is adjusted to the angle (a5) and is pressed to 1Φ during the press, and due to its descent, the pressing force of the press is medium*@s J: Type n
It is added to the forging material (10 ml) through the t-.

A shape button that matches the shape of the product is formed based on the drill, and the mother M
At the close positions of (A-D) and (A-D), the conical surfaces of the upper and lower molds become parallel. In this way, for the forged material (10 people), the upper mold 0. As shown in FIG. 5, the lower mold (b) also comes into contact with the entire projected surface of the forging material in a narrow range (a). On the 6 sticks attached to the center of the lower mold 0su)
is used for positioning the forged material. Rotary forging becomes easier if you place a hole in the center of the wasteland through which the 8-piece hole passes.

However, the core frame and rough ground center hole drilling are not necessarily required. The operation of the rotary forging device of the present invention has been explained as a supplement to the basic structure, but the rig and boss-attached 7
The specific technique for forging lunge material will be explained as follows.

YF with a center hole that has been forged in advance to give it a forged effect!
, :Prepare 1tit 0. Be careful not to raise the upper mold (2) on rough ground. The forging material is rotated by operating the upper mold t-σIR 6-turn table until the contact surface of the next lower mold is almost removed from the contact surface caused by the previous reduction. Perform the next reduction. Rotation forging is performed by repeating this O operation.

As an example, when forging a large disc material made of a super heat-resistant alloy used in an axial flow pressure N machine for a jet engine, the minimum thickness of the disc part can be achieved by stamping with a conventional large hammer! ll
Although it is possible to reduce the thickness by only 40R@5 degrees, by rotary forging using the apparatus of the above embodiment of the present invention, it is possible to reduce the thickness to about 25 degrees, and the material yield has improved by about 5,596 degrees.

Figures 6 and 4 show a large 7-lunge shaped umbrella t like an exhaust valve.
- shows a device according to a variant embodiment of the invention, suitable for rotationally forging a shaft (10B) with wood; 6811, which is the same as the previous embodiment in FIG. The device has a thicker diameter at the part that forms the ff1l.The axis of the lower mold (to) is changed to the lower 11 (lower support is to the table) and the machining center axis! I'm parallel! The axial stripe (5'-B) in the upper mold is inclined at an angle (α■).

In the conventional press forging for comparison, as shown in FIG. 6, the inclination angle (cl) of the upper mold surface is 1. Upper mold surface and duty force (
In addition to the force required for the deformation of the material itself for upsetting the umbrella part, there is a
“”TFFTi aoa a m PV(tan a
In this 5iIiii embodiment of the device of the present invention, as shown in Fig. 5, the contact part (a) between fJl and the forged material is Limited to a part, the north of the average width of the contact part and the radial length ■ is much smaller than 1.0. Since the outer diameter is expanded by stretching in the circumferential direction, the extension deformation of the conventional technology is approximately 1/1 compared to that of the conventional technology.
The middle part can be formed with high precision using the 0 press reduction blade.

(Effect of the invention) The effects of the present invention can be summarized in the following two points.

(1) By operating the rotary forging apparatus of the present invention using a general forging press, a large disk material can be formed with high precision.

Conventional technology O co-rotating forging equipment uses a spherical seat, so it was only possible to forge very small padding materials.In the present invention, the upper and lower dies are tilted at a complicated angle with respect to the machining center axis without using a spherical seat sound. Place.

Since the forging deformation part of the forged material is rotated by rotation of the lower die and the forging operation is repeated repeatedly, the function of rotary forging is exerted using a normal forging press and a small lower die 11 times, and a large downward load is applied to the press. The large-diameter disc material tube provides a sufficient training effect while also providing high precision and high quality, and does not require reversal of the top and bottom surfaces.

In the conventional rotary forging method, the upper surface is in contact with the rotating upper mold and deformed, and the lower surface is in contact with the stationary lower mold and deformed.
Since the forging material is not carefully inverted, there will be a large difference in the forging effect on the upper and lower surfaces, and it is difficult to obtain high-quality products with completely destroyed microcrystals using super heat-resistant copper for jet engines. In the present invention, the upper and lower dies contact the forged material from above and below under the same conditions and deform it.

The training effect is equal on the top and bottom.

l) In the present invention, even with a relatively small press capacity, a large pressing force per unit area can be effectively applied to the forged material with a small contact area. Heat-resistant steel generally has a high deformation resistance and increases rapidly as the temperature decreases, but the present invention is advantageous in providing a large rolling reduction even in this state to create a uniform microstructure.

FIG. 2 is a vertical sectional side view of a rotary forging device according to a specific embodiment of the present invention, and FIG. Figure 4 is a vertical side view during forging, Figure 5 is a flat bar diagram showing the contact deformation area of the die against the forging material, and Figure 6 is a diagram of the working force chest of the conventional press forging. Diagram showing.

FIG. 7 is a vertical side view of a typical example of a conventional rotary forging machine, and FIG. 8 is a side view showing its operating mode.

(1)-Φ lower mold & tg)・-ram type hydraulic press & (
8) Upper die, (4) Rotary drive unit, (5) Main shaft, (6) Φ Ball seat, (υ Alignment) S (S)
・・Electric motor, (9)・-gear, α0 (10A) (10
B)--Forged material, (10B)--Rough land, (B)...
Lower mold, 0-1α◆...Press opening (to)...Upper mold, to)
・The middle receiver is a stand, Qlm・Press midfield.

H-・The lower support is the stand, @...the rotating table, @...the center protrusion line angle,
(α) (α1) (α')... Axis inclination angle, (4 degrees, inclination angle s (pv), degree press reduction blade, (pn)...
Center directed force, (PN)・＠丞direct force, (b)Φ・friction coefficient.

(a)...! S contact deformation* M15 medium - average width of contact area,
(6)・@Contact part length in direction.

Claims (1)

[Claims] The press surfaces of the upper and lower molds are formed into conical shapes, and their axes are tilted in the same radial direction with respect to the processing center axis at an angle of inclination equal to the conical generatrix angle of each press surface. In the inclined direction, the conical generatrix of the pressing surface of the upper die and lower die is perpendicular to the processing center line, and based on this arrangement, the lower die can be rotated around the inclined axis at a constant height. A rotary forging device characterized in that a supporting upper mold is fixed to a press middle plate that relatively descends in the direction of a processing center line, so that pressing force is applied to a forging material between the upper and lower molds.