JPS582731B2 - Disc training device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc training device that allows discs to be manufactured efficiently using a free training method.

In the free forging method, the material to be forged (steel ingot) is generally inserted between the hard anvils installed above and below, that is, between the lower fixed pressure receiving member and the upper movable pressure member that can be raised and lowered. It is customary to pressurize and forge the material to be forged by vertical movement.

When manufacturing a disc using this free forging method, conventionally,
A method is adopted in which the material to be forged is sequentially pressurized over the entire surface.
In addition, the actual situation is that the material to be forged is once forged into a polygonal shape that is relatively close to a circle, and then cut into a predetermined circular shape.

In this method of sequentially applying pressure to the entire surface of the material to be forged, as the material to be forged becomes larger, the equipment must also be larger.Also, depending on the size of the material to be forged, the forging process takes a long time. Further, there is a drawback that forging into a polygonal shape is very disadvantageous in terms of yield.

This drawback is especially noticeable when manufacturing super-dog-shaped disks such as those used in nuclear power vessels, and for this reason, it has been considered extremely difficult to manufacture large disks using the free-training method.

The present invention has been made in view of the above circumstances, and allows for rational forging production of large discs using relatively small equipment, and contributes to improving yields and reducing equipment costs. The purpose of this invention is to provide a disc training device that can be used for training discs.

The present invention is characterized by a pressure receiving member that receives a part of the lower surface of the material to be forged during forging, a pressure member provided above the pressure receiving member that can be raised and lowered, and a position that does not interfere with the pressure receiving member. A feeding member for the material to be forged, which is provided to be able to reciprocate around a vertical axis and move up and down; an elevating device that reciprocates the feeding member vertically at predetermined intervals; and a lifting device that reciprocates the feeding member by a predetermined amount in the circumferential direction. The apparatus for forging a disk comprises a turning device for moving the disk, and the upper end pressure receiving surface of the pressure receiving member is disposed at a predetermined height within the vertical movement range of the feeding member in the turning path of the material to be forged.

That is, the device is configured to displace the material to be forged by a predetermined amount by a sending member that can be raised and lowered and rotated, while partially forging a predetermined portion of the material to be forged using a pressure member and a pressure receiving member. It is.

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

1 to 4 show a first embodiment of the disc training device according to the present invention. In the figures, 1 is a pressure receiving member, which is replaceably mounted on the upper part of a pressure receiving plate 11. .

Reference numeral 2 denotes a pressure member, which is installed above the pressure receiving member 1 so that it can be raised and lowered via a lifting device (not shown).

3 is a feeder for floating and rotating the material to be forged, and the vertical axis 4
is fixed to the top edge of the

Reference numerals 31, . . . support metal fittings are replaceably protruded from three positions on a predetermined circumference of the upper surface of the feeder 3 so as to support the material to be forged at three points.

Reference numeral 32 denotes a notch provided at a predetermined portion around the feed plate 3. A part of the pressure receiving member 1 is exposed within this notch 32, and the feed plate 3 is placed within the range of the gap 33 between the notch 32 and the pressure receiving member 1. is designed to be able to rotate back and forth.

34 is a water cooling chamber provided in the center of the feeder 3, and 35 is a protective wall hanging below the periphery of the feeder 3.

Reference numeral 41 indicates a lifting collar body attached to the lower end of the vertical shaft 4, and reference numeral 42 indicates a reciprocating turning claw body provided protruding from the upper outer periphery of the vertical shaft 4.

Reference numeral 5 denotes a bearing stand, which supports the vertical shaft 4 so that it can move up and down as well as rotate. The bearing stand 5 has a cylindrical structure for raising and lowering the vertical shaft 4, and pressure chambers 52 and 54 are formed inside thereof on both sides above and below the collar body 41 for raising and lowering the vertical shaft 4.

5L53 is a supply port for supplying pressure medium such as hydraulic pressure to the pressure chambers 52.54.

Reference numeral 6 denotes a turning ring, which is rotatably provided at the upper end of the bearing stand 5.

Reference numeral 61 denotes engagement grooves provided at two locations on the inner circumferential surface of the ring 6, and the pivoting pawls 42 of the vertical shaft 4 are engaged with these engagement grooves 61 so as to be slidable in the axial direction.

Reference numeral 62 denotes a bracket fixed to the swing ring 6, which is connected to the rod end fitting 64 of the swing cylinder 65 via a pin 63.
is pivotally connected to.

66 is a support frame for the swing cylinder 65, which is attached to a predetermined part of the upper part of the bearing stand 5; I is a hydraulic device that connects the swing cylinder 65 and the pressure chamber 5 2 through accumulators 71, 72, and 13; 5 4 supply port 51
．． 53.

Next, the operation of the above-mentioned apparatus will be explained with reference to the process diagram of FIG.

In FIG. 5, L is the top dead center level of the support fitting 31;
L2 is the horizontal level of the upper end pressure receiving surface 1a of the pressure receiving member 1, L3
indicates the bottom dead center level of the support metal fitting 31, and the movement of the upper end surface of any support metal fitting 31 is shown by a thick line.

Now, at point A, with the support metal fitting 31 positioned above the top dead center level L1, the material to be forged 8 is supplied and placed thereon.

In such a case, the material to be forged 8 is heated to about 1100 to 1200° C. and is previously formed into a disk shape, with only the central portion 81 having a circular shape and the upper and lower surfaces having a predetermined thickness by a separate method. It is assumed that this is supplied and placed on the support metal fitting 31 so that a part of the peripheral thick portion 82 is located between the pressure member 2 and the pressure receiving member 1.

In addition, since the already-forged area of the central part 81 of the material to be forged 8 is relatively small, it can be easily forged using a well-known forging device.

Further, when the material to be forged 8 is placed on the support metal fitting 31, the upper end surface 31a of the support metal fitting 31 is connected to the pressure receiving member 1.
It is located above the top dead center level L1 above the horizontal level L2 of the upper end pressure receiving surface 1a, and therefore, the lower surface 8 of the material to be forged 8
3 is apart from the pressure receiving surface 1a.

In this state, the pressure member 2 is
When lowered, the pressurizing member 2 hits a predetermined portion of the thick peripheral portion 82 of the material to be forged 8, and forcibly pushes down the material to be forged 8 by a dimension l1.

Along with this, while pushing the pressure liquid in the lower pressure chamber 54 of the vertical shaft 4 back into the accumulator 73, each of the support fittings 31, the feed plate 3, and the vertical shaft 4 follow and descend together, and the to-be-forged material A predetermined portion of the lower surface 83 of 8 is pressed against the upper end pressure receiving surface 1a of the pressure receiving member 1, and the pressure member 1 further descends thereafter.
A predetermined portion of the material to be forged 8 is partially forged within a predetermined range by the pressing force.

On the other hand, during the downward movement of the pressure member 1 following the l1 dimension, a detection device (not shown) operates at point B before the lower surface 83 of the workpiece 8 hits the upper end pressure receiving surface 1a of the pressure receiving member 1, and the hydraulic equipment 7, and the upper supply port 5 passes through the accumulator 12.
1 into the upper pressure chamber 52, and
While pushing the pressure medium in the lower pressure chamber 52 into the accumulator 73 from the lower supply port 53, the vertical shaft 4, feed plate 3, and support fitting 31 are forcibly lowered and retracted together by the l2 dimension to point C. Then, the support metal fitting 31 is separated from the material to be forged 8.

At this time, the material to be forged 8 is held under pressure between the pressure member 2 and the pressure receiving member 1, so that the material to be forged 8 is held horizontally even if the support fitting 31 is separated downward.

Next, when the support fittings 31 and the like are lowered and retracted to a predetermined position (point C), the swing cylinder 6 operates to move forward, and the vertical shaft 4 and its integral part are moved through the swing ring 6 and the swing claw body 42. The feed plate 3 and the support fittings 31 are rotated counterclockwise by a predetermined amount, that is, from point C to point D by 13 dimensions, and then, contrary to the descent, the pressure is supplied from the accumulator 73 through the lower supply port 53. While supplying pressure medium to the lower pressure chamber 54 and pushing the pressure medium back from the upper pressure chamber 52 into the accumulator 72 through the supply port 51, the vertical shaft 4 and the feed plate 3 integrated therewith are forcibly raised and returned. let

Along with this, the support metal fitting 31 is attached to the lower surface 8 of the material to be forged 8.
3, the material to be forged 8 is levitated to a predetermined height by a dimension of 12+V1.

At this time, the support metal fitting 31 comes into contact with the lower surface 83 of the material to be forged 8 at a position that is pivoted by a predetermined amount (angle) in the circumferential direction from the previous contact position.

Further, during the upward movement of the vertical shaft 4, etc., a detection device (not shown) is activated at point E, and at the same time as the support fitting 31 hits the workpiece 8, the upper pressure member 2 is moved to a predetermined position. It returns to a higher height and leaves the material to be forged 8.

After that, when the feed plate 3 rises to the top dead center, the turning cylinder 65 operates in a backward movement, and moves the feed plate 3 clockwise by a predetermined amount via the turning ring 6, the pawl 42, and the vertical shaft 4. In other words, from point F to point G (from point G to point A [l4 dimension (!l4=l
3) Swirl the material 8 to be forged in the circumferential direction by a predetermined amount (
angle), the unforged portion adjacent to the previously forged portion is exposed above the pressure receiving member 1, and is on standby in preparation for the next forging by lowering the upper pressure member 2.

In this way, one cycle of operation is completed, and by repeating the above operation, the thick portion 82 around the forged material 8 is fed a predetermined amount at a time, and the surrounding thick wall portion 82 is covered with a predetermined amount over the entire circumference. A predetermined disk is produced by forging to a thickness equal to that of the central concave portion 81.

In such a case, the material to be forged 8 is fed in the circumferential direction when the feeder 3 makes a return trip during the reciprocating rotation, and the supporting metal fittings 31 are separated from the material to be forged 8 during the forward rotation, and The feed plate 3 is connected to the pressure receiving member 1 by the notch 32 provided in the plate 3.
Since the forging material 8 can be reciprocated without being interfered by, the material to be forged 8 can be accurately and smoothly fed by a predetermined amount.

Further, the timings of the vertical movement of the upper pressurizing member 2 and the vertical and rotational movements of the vertical shaft 4, etc. are set in advance to coincide with each other by a detection device (not shown), and accumulators 71, 72, and 73 are provided. This provides protection against impact even if a slight timing shift occurs.

In addition, the water cooling chamber 34 provided in the center of the feeder 3 allows
The high temperature of the material 8 to be forged does not reach the vertical axis 4.

Further, the problem of heat conduction can be easily solved by cooling the built-in hydraulic equipment 7 by means such as introducing and releasing cooled pressure gas so that the ambient temperature does not rise.

Note that the drive source for raising, lowering, and turning the feed plate 3 and the like is not limited to hydraulic pressure, and it is of course possible to introduce and use a separate pressure source.

By the way, in the first embodiment, the pressure-receiving member and the pressure-applying member are arranged on the side away from the center of the apparatus body, and one side in the diametrical direction of the peripheral thick portion of the material to be forged is forged at a predetermined angle. However, the present invention can also be implemented as follows.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.

In the figure, reference numeral 1' denotes a pressure receiving member fixed on a pressure receiving plate 11', and its length is formed into a straight shape slightly larger than the diameter of the product.

Reference numeral 9 denotes a main body of the apparatus, which is formed in the shape of a casing, and inside thereof is equipped with an annular turning feed plate 3' via an annular guide rail 36 so as to be able to freely turn in a reciprocating manner.

Reference numeral 5' denotes lifting cylinders, which are attached to three circumferential locations on the feed plate 3', with their upper ends facing upward through arcuate long holes 91 provided in the upper wall of the device main body 9.

Reference numeral 4' denotes a cylinder ram, on the upper end of which a support fitting 31' is replaceably attached via a fixing cap 43.

Although not shown inside the device main body 9, there are hydraulic equipment, an accumulator, and a feed plate 3' similar to those in the first embodiment.
A turning cylinder is provided for reciprocating the movement of the cylinder, and each lifting cylinder 5' operates synchronously, and the lifting cylinder 5' and the turning cylinder operate at different times. It has become.

Further, each of the support fittings 31' moves in the same manner as the support fittings 31 of the first embodiment via the feed plate 3', the lifting cylinder 5', and the cylinder ram 4'.

Therefore, according to the apparatus of the second embodiment, the workpiece 8' is kept constant through each support fitting 31' by raising and lowering the cylinder ram 4' of each lifting cylinder 5' and reciprocating rotation of the feed plate 3'. While rotating and displacing the material 8' in angles, the straight pressure member 1' and pressure member 2' can always forge the diameter portion passing through the center of the material 8' to be forged by a predetermined width. There is no need to make a depression in the center of the forging material in advance, and the process can be omitted accordingly.

Further, in the first embodiment, the entire circumference could not be forged unless the material to be forged was rotated once, but in the second embodiment, the entire circumference could be forged by only turning the material 14 times or less.

In each of the above embodiments, if there is a large difference in dimension between the initial material thickness of the materials to be forged 8, 8' and the finished disk, it is sufficient to divide the material into several parts and repeat the reheating and forging. .

As a result, even a large-diameter disk can be easily finished to a desired final size.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above embodiments, and for example, the support metal fitting 3 1 . Regarding 3 1', in the illustrated example, three are provided for each, but the number may be two or four or more.

In particular, in the first embodiment, the support metal fitting 31 may be omitted and the material to be forged may be fed directly by the feeder 3.

In addition, the driving source for raising and lowering and turning the material to be forged is not limited to hydraulic pressure, but a separate pressure source may be introduced and utilized, and the specific structure of the turning means, lifting means, and other parts of the feed plate also deviates from the gist. However, the design can be changed as appropriate within the scope.

As described above, in the present invention, a disk is produced by forging the material to be forged by rotating and displacing it by a predetermined amount and sequentially forging predetermined parts of the material. Compared to other devices, the pressure-receiving member, the pressure-applying member, their pressure-applying drive source, etc. can be made smaller, the space of the entire device can be made compact, and the equipment cost can be reduced.

Moreover, even a large disk, which was conventionally considered difficult, can be forged easily and very efficiently, and since it is forged in a circular shape by turning, it can also contribute to an improvement in yield.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of the device of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view taken along line 1 in FIG.
Fig. 4 is a sectional view taken along the line IV-IV, Fig. 5 is a process explanatory diagram,
FIG. 6 is a plan view showing a second embodiment of the device of the present invention, and FIG. 7 is a partially sectional front view thereof. DESCRIPTION OF SYMBOLS 1... Pressure receiving member, 2... Pressure member, 3... Feeding board, 4... Vertical shaft, 41... Lifting collar body, 42... Turning claw body, 5...・Bearing stand, 52.54...pressure chamber,
6...Swivel ring, 65...Swivel cylinder, I
... Hydraulic equipment, 8... Material to be forged.

Claims (1)

[Claims] 1. A pressure-receiving member that receives part of the lower surface of the material to be forged during forging, a pressure member that is provided above the pressure-receiving member and is movable up and down, and is arranged so as not to interfere with the pressure-receiving member and can swing back and forth around a vertical axis. It consists of a feeding member for the material to be forged that is large and can be raised and lowered freely, an elevating device that reciprocates the feeding member by a predetermined amount in the vertical direction, and a turning device that reciprocates the feeding member by a predetermined amount in the circumferential direction. . A disk forging device, characterized in that the upper end pressure receiving surface of the pressure receiving member is disposed at a predetermined height within the vertical movement range of the feeding member in the turning path of the material to be forged.