JPH02133196A - Double acting press equipment - Google Patents

Abstract

PURPOSE:To make the length in height direction of a press small and to suppress the deformation of a press frame by forming a cylinder chamber in a crosshead, inserting and fitting a cover body from a fixed side into this cylinder chamber and also inserting and fitting a pressurizing member. CONSTITUTION:A blank material 50 is set onto a forming member 49 of a forming element means 48, a crosshead 40 and a blank holder 52 are allowed to descend by operating a driving means 54, and to blank material 50 is pressed against the outside peripheral part of a forming part 49A. Subsequently, by working hydraulic pressure onto a cylinder chamber 39 of the crosshead 40, hydraulic pressure is supplied between the lower end face of a cover body 38 and the upper end face of a pressurizing member 41, the pressurizing member 41 is allowed to descend and allowed to go into the forming part 49A, and by using the forming part 49A and the pressurizing member 41 as a female die and a male die respectively, prescribed press forming is executed to the blank material 50. In this case, through a press axial load in the press forming is received and undertaken by a press frame 30, the length in the height direction becomes small since the pressurizing member 41 is inserted and fitted into the cylinder chamber 39 of the crosshead 40 and contained as a pressurizing force generating means 37, and a deformation of the press frame 30 is inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a double-acting press device, and is used for forming blank materials such as steel plates, die forging, and the like.

(Prior art) As a technology for press forming a blank material such as a steel plate, a press force generating means and a forming element means are disposed vertically facing each other inside a press frame that takes charge of press axial force. On the force generation means side, there is a double-acting press device equipped with a blank holder that presses the blank material on the forming element means side.

This press apparatus will be outlined with reference to FIGS. 11 to 13.

In FIGS. 11 to 13, reference numeral 1 denotes a press frame, which is shown in a wire-wound shape with a piano wire 2 wound around its outer periphery. 3
4 is an upper pressure receiving plate, and 4 is a lower pressure receiving plate, which are fixed facing each other at the upper and lower sides inside the press frame 1.

5 is a press force generating means, which includes an upper lid body 6 fixed to the upper pressure receiving plate 3, a cylinder 7 into which this upper lid body 6 is inserted;
It consists of a main ram (piston) 8 that is inserted into the cylinder 7, and the main ram 8 has an outer circumferential collar 9 on its axially intermediate blank.
It is inserted into the cylindrical portion 11 of the crosshead 10 below the cylinder 7.

Reference numeral 12 denotes a molding element means, which includes a mold member 14 having a molding part 13 attached to the lower pressure receiving plate 4, and also has a knockout member 15 built therein.

16 is a blank holder, which holds the blank material 1 on the mold member 14;
7 and is attached to the lower surface side of the crosshead 10.

18 is a cylinder device for driving a blank holder, 19 is a balance cylinder device, 20 is a crosshead elevating cylinder device, and 21 is a crosshead guide means.

In this prior art, the blank material 17 on the mold member 14 is pressed down by the cross head 10 and the blank holder 16 by the actuation of the cylinder device 18 for driving the blank holder, and then the outer peripheral part of the blank material 17 is pressed down. The main ram 8 is lowered by applying hydraulic pressure (hydraulic pressure) inside the main ram 8, and the lower end of the main ram 8 enters the forming section 13 to perform predetermined forming.

After molding, the balance cylinder device 19 raises the main ram 8, and the crosshead 10 is raised by its lifting cylinder device 20.

(Problems to be Solved by the Invention) In the prior art shown in FIGS. 11 to 13, the crosshead 10 is arranged below the cylinder 7 of the press force generating means 5, and the cylinder 7 and the crosshead 10 are moved vertically. Since the press is located at the top of the press, there is a problem that the height of the press becomes too high and the size of the press increases.

This increase in size of the press results in problems such as the complexity of the crosshead guide means 21, the increase in the size of the means for replacing the sealing member of the main ram 8, the increase in the number of parts, and a decrease in handling properties.

Furthermore, technically speaking, the press frame 1 is responsible for the press axial force, so the fact that the cylinder 7 and the crosshead 10 are arranged vertically inside the press frame 1 is due to the fact that the press frame 1 is responsible for the press axial force. The deformation becomes large, and this causes the problem that the press frame 1 must be made stronger or stronger than necessary, or the press force must be reduced. Although it must be solved regardless of the problem, it is a serious problem especially in the wire-wound type because the press frame deforms during wire winding and loading (forming operation).

In the present invention, a cylinder chamber is formed in the crosshead, a lid from the fixed side is inserted into the cylinder chamber, and a pressure member (main ram or piston) is inserted into the cylinder chamber, thereby controlling the height direction of the press. The main purpose is to make the press frame smaller and thereby suppress deformation of the press frame.

(Means for Solving the Problems) The present invention disposes a press force generation means 37 and a forming element means 48 vertically facing each other inside a press frame 30 that takes charge of press axial force, and In a double-acting press device equipped with a blank holder 52 that presses a blank 50 on the forming element means 48 side against the generating means 37 side, the following technical measures are taken to achieve the above object.

That is, in the present invention, the lid 38 is fixed to either the upper or lower side of the press frame 30, and the lid 38 is placed in the cylinder chamber 39 of the crosshead 40 that is movable in the press axis direction. The pressure member 4 is inserted into the cylinder chamber 39 on the molding element means 48 side.
1 is slidably inserted into the press force generating means 37.
, a blank holder 52 is provided on the side of the crosshead 40 facing the forming element means 48 , and the crosshead 4 has the blank holder 52 independently of the pressing member 41 .
The first feature is that a drive means 54 is provided to move the motor.

Furthermore, the present invention has guide pins 41^, 38A in the press axis direction on either one of the lid body 38 and the pressure member 41, and a guide hole 38B for receiving the guide pins 41A, 38A on the other side. , 41B, and the guide pins 41A, 38A and the guide holes 38B, 41B are inserted so that the pressure member 41 is held by the lid body 38 at the end of the pressure stroke of the pressure member 41. The second feature is that it is integrated.

(Function) According to the first feature of the present invention, the lid 38 is fixed to either the upper or lower side of the press frame 30, and the lid 38 is placed in the cylinder chamber 39 of the crosshead 40 movable in the press axis direction. The pressing force generating means 37 is inserted with a length longer than the movable stroke of the crosshead 40, and the pressurizing member 41 is slidably inserted into the cylinder chamber 39 on the forming element means 48 side. The press force generating means 37 is built in the cross head 40, and the press height is thereby reduced.

A blank material 50 is placed on the forming element means 48, the blank holder 52 is lowered together with the crosshead 40 by the drive means 54, the blank material 50 is pressed, and in this state hydraulic pressure (hydraulic pressure) is applied to the cylinder chamber 39 of the crosshead 40. When the pressure member 4 is applied, the lid body 38 is fixed.
1, the blank material 50 is formed using the pressure member 41 as a male mold.

According to a second feature of the present invention, in addition to the first feature described above, the guide pins 418, 38A and the guide hole 3
8B and 41B, the pressure member 41 is held by the lid body 38 at the stroke end of the pressure member 41, and the lateral addition is reduced, so that the press frame 30 is further lightened.

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

1 to 4 show a first embodiment of the first feature of the present invention. In each of these figures, reference numeral 30 designates a press frame, and a pair of semicircular yokes 31. 32 and a column 32 that connects the yokes 31 and 32 to each other, and a group of piano wires 34 is wound around the outer periphery.

35 is an upper receiving plate, which is attached to the lower end surface of the upper yoke 31; 36 is a lower receiving plate, which is attached to the upper end surface of the lower yoke 32; the upper receiving plate 35 and the lower receiving plate 36 are vertically opposed to each other; are doing.

37 is a press force generating means, which includes a lid 38, a crosshead 40 having a cylinder chamber 39 into which the lid 38 is inserted, a pressure member 41 which is inserted into the cylinder chamber 39 of the crosshead 40, etc. It consists of

The lid body 38 has a protrusion 42 at the upper center thereof, and the upper receiving plate 35
The protrusion 42 is inserted into a centering hole 43 formed on the press axis, and is fixed inside the press frame 30 via the upper receiving plate 35.

The crosshead 40 consists of an outer cylindrical member 44 and an inner cylindrical member 45. Both cylindrical members 44 and 45 are connected by shrink fitting or the like, and a mirror-finished cylinder chamber 39 is formed on the inner peripheral surface of the inner cylindrical member 45. A sealing member 46 is provided on the outer periphery of the lid 38 inserted into the cylinder chamber 39.

Here, since the crosshead 40 moves (movable) in the vertical direction and the lid 38 is fixed, the insertion length of the lid 38 inserted into the cylinder chamber 39 is the vertical stroke length of the crosshead 40. This is said to be the above.

The pressure member 41 has a seal member 47 on its upper outer periphery,
The pressure member 41 is inserted into the cylinder chamber 39 via the seal member 47 so as to be able to move up and down, and the lower end surface side of the pressure member 41 substantially functions as a male die of the press.

Therefore, when fluid pressure (oil pressure, etc.) (not shown) is supplied between the lower end surface of the lid body 38 and the upper end surface of the pressure member 41 through a flow path, the pressure member 41 is applied because the lid body 38 is fixed. Thrust in the downward direction (pressing direction) is generated.

48 is a molding element means, in which a mold member 49 having a molding part 498 is removably attached to the lower receiving plate 36, and the pressurizing member 41 can enter into the molding part 49A.

Note that 50 indicates a steel plate or other blank material, and 51 indicates a knockout means for a product.

Reference numeral 52 denotes a blank holder, which is attached to the side of the crosshead 40 facing the forming element means 48, in this example, the lower end surface of the crosshead 40, with bolts or the like (not shown).
The pressure member 41 is slidably inserted into the center hole 53 of No. 2. Although it is more advantageous to attach the blank holder 52 to the crosshead 40 in a detachable manner, it may be formed integrally with the head 40.

Reference numeral 54 denotes a driving means which operates the cross head 40 and the blank holder 52 as one unit and independently of the pressurizing member 41. When mated, fluid pressure (
The piston rod 56 is moved up and down by hydraulic pressure, and the rod 56 is attached to the crosshead 40.

Note that the driving means 54 are arranged diagonally in plan view as shown in FIG.

57 is a guide means, which connects the lower receiving plate 36 and the cross head 4.
a guide rod 58 extending vertically across 0;
It is provided with a guide shoe 59, etc., and has a so-called gate shape in elevation, and is arranged diagonally in plan view as shown in FIGS. 3 and 4.

Reference numeral 60 denotes a crosshead elevating cylinder device, in which two of the guide rods 58 of the guide means 57 are arranged at diagonal positions.
A cylinder part 63 in which a book is extended downward from the lower receiving plate 36 and a piston 62 formed in the extended part is erected on the base 61.
The crosshead 40 is raised and lowered by applying fluid pressure (hydraulic pressure) to the cylinder portion 63.

As shown in FIG. 1, the piston rod (guide rod) 58 of the lifting cylinder device 60 is supported by the lower support plate 36 via a spherical bearing 64.
A small diameter shaft portion 66 is inserted through the stepped portion 65 and fastened with a nut 67.

The operation of the first embodiment according to the first feature of the present invention will be explained with reference to FIGS. 5(1) to 5(5). FIG. 5(1) shows the initial state. and
A blank 50 is set on the forming element means 48 .

Next, by operating the drive means 54, the crosshead 40 and the blank holder 52 are lowered, as shown in FIG.
As shown in 2), the blank material 50 on the outer periphery of the molded part 49A is pressed. During this step, since the length of insertion of the lid 38 is longer than the stroke of the crosshead 40, the crosshead 40 does not come out of the lid 38 (it is guided).

Next, fluid pressure (
By applying pressure (hydraulic pressure), the pressure member 41 is lowered and enters the molding section 49A, where a predetermined press molding is performed in which the molding section 49A is a female mold and the pressure member 41 is a male mold.

That is, since the lid body 38 is fixed and the pressure member 41 is slidable, when fluid pressure acts on the cylinder chamber 39, the pressure member 41 receives thrust in the press direction and press-forms the blank material 50. (See Figure 5 (3)).

The press axial force in this press forming is borne by the press frame 30, but a pressure member 41 is inserted into the cylinder chamber 39 of the crosshead 40 and is built in as a press force generating means 37. Therefore, it becomes smaller in the height direction, and deformation of the press frame 30 is suppressed.

When the predetermined press forming is completed, the pressure member 41 is raised by applying fluid pressure to its lower surface (see Fig. 5 (4)).
)), the cross head 4 is moved by the lifting cylinder device 60.
0 together with the blank holder 52 (Fig.
), the product 50A is taken out from the molding section 49^ by the knockout means 51, and the press cycle ends here.

FIG. 6 shows a second embodiment of the first feature of the present invention, in which a press frame 30 connects a top platen 131 and a bottom platen 132 to a plurality of columns 133 and nuts 13.
4 is fastened and connected to form a column,
Since the basic structure and operation are the same as those of the first embodiment, common parts are indicated by common symbols.

FIG. 7 shows another embodiment of the present invention in which the guide means 57 is changed, and a guide rod 58 is extended upward from the cross head 40 and slidably inserted into the guide hole 35A formed in the upper receiving plate 35. , the guide hole 35A is used as a support part, and the guide hole 35A and the lid body 38
The fitting portion for the cylinder chamber 39 of
By forming the support part in the horizontal direction, the span L between the upper and lower support parts can be shortened, and the bending moment caused by the eccentric load can be effectively dealt with. This is to prevent this from occurring.

To explain this point with reference to FIG. 8, for example,
When the forming part 49A has an inclined surface part, an unavoidable eccentric load and a reaction force F are generated due to the press forming of the blank material 50, and this eccentric load generates a bending moment FXe. The lateral load is received by the insertion part of the lid body 38 on the upper side (Fx
e=fXL), on the lower side, it is received by the support portion 36A of the lower receiving plate 36 of the guide rod 58.

That is, eXF=LXf, f=6xF, and here, even if the press frame 30 has a structure that is weak against lateral loads by shortening the span L between the upper and lower support parts, the column 3
3.133, so that it can endure without increasing the diameter, cross-sectional area, etc.

9 and 10 are both embodiments of the second feature of the present invention, and in FIG. 9, the pressure member 41 has a guide pin 418 in the press axis direction projecting upward. The lid body 38 has a guide hole 38B for receiving the guide bottle 41A, and the guide pin 41A and the guide hole 38B are arranged so that the pressure member 41 is connected to the lid body 38 at the end of the pressure stroke of the pressure member 41. It is held in the relationship that it is inserted and engaged with Chiaki so that it can slide freely.

Further, in FIG. 10, a guide pin 388 is formed in the lid body 38, and a guide hole 41B is formed in the pressure member 41.

In both FIGS. 9 and 10, the pressure member 4
The support length L' of the press frame 1 becomes longer by at least the length of the guide pins 41A and 38A, so that the lateral load f° is reduced, and accordingly, the press frame 30 is further reduced.

Furthermore, the load of the pressure member 41 on the seal member 47 is reduced, deformation and wear of the seal member 47 are also reduced, and the life of the seal is extended.

In addition, the guide bins 38A, 41A and the guide hole 38B,
41B are provided in upper and lower pairs on the center of the press in both the embodiments shown in FIGS. 9 and 10, but they may be provided in plural pairs.

Furthermore, in each of the embodiments shown in FIGS. 9 and 10, FIGS.
Components shown in FIG. 4 and the like are designated by common reference numerals.

The spherical bearing 64 in the first embodiment functions so that the guide rod 58 is always oriented in the vertical direction when the lower support plate 36 is deformed.

Further, in each of the embodiments described above, the press force generating means 37 is provided in the upper part and the forming element means 48 is provided in the lower part in the press frame 30, but this may be arranged upside down. Further, the press frame 30 may be of a wound shape, a column shape, a laminated steel plate shape, or the like.

(Effect of the invention) The present invention is as described above, and has the following advantages.

According to the first feature of the present invention, a lid body is fixed to either the upper or lower side of the press frame, and the lid body is placed in a cylinder chamber of a crosshead movable in the axial direction of the press for a length longer than the movable stroke of the crosshead. Since the pressing force generating means is constituted by inserting the pressurizing member into the cylinder chamber on the side of the forming element means in a slidable manner, the press force generating means is inserted into the crosshead. is built in, which allows the height of the press to be lowered, thereby reducing the amount of deformation of each part, including the press frame.

Along with this, not only can it be expected that the surface of the guide means of the crosshead will be smoothed and the handling efficiency such as replacement of the sealing member will be improved, but also maintenance can be performed easily and accurately, and a molded product of good quality can be obtained.

Furthermore, a blank holder is provided on the side of the crosshead that faces the forming element means, and driving means for moving the crosshead having the blank holder independently of the pressure member is provided, so that the pressure member becomes obsolete. The return to position can be performed by the press force generation means, which eliminates the need for a balance cylinder device as in the prior art (and can be expected to reduce the number of parts). Since it is also used as a part, weight and number of parts can be reduced.

Furthermore, according to the second feature of the present invention, either the lid body or the pressure member has a guide pin in the press axis direction, and the other has a guide hole for receiving the guide pin, and both Since the pressurizing member is engaged even at the end of its stroke, in addition to the advantage of the first feature mentioned above, the support length of the entire pressurizing member is lengthened, which reduces the lateral load, etc. This provides advantages such as improved durability of the sealing member.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention and a conventional example, and FIGS. 1 to 4 show a first embodiment of the first feature of the present invention, FIG. 1 is an elevational sectional view, and FIG. is a partially cutaway front view,
Figure 3 is a sectional view taken along the line A-A in Figure 1, and Figure 4 is a cross-sectional view taken along Figure 1 B-B.
Line sectional views, Figures 5 (1) to 5 (5) are
FIG. 6 is an elevational cross-sectional view of the second embodiment of the first feature of the present invention;
FIG. 7 is an elevational sectional view of the third embodiment, and FIG. 8 is an elevational sectional view showing the behavior of the embodiment of the present invention against eccentric loads.
9 and 10 are elevational sectional views showing an embodiment according to the second feature of the present invention, FIG. 11 is an elevational sectional view of a conventional example, and FIG. 12 is a sectional view taken along the line CC in FIG. 11. , FIG. 13 is a sectional view taken along the line CC in FIG. 11. 30...Press frame, 37...Press force generation means,
38... Lid body, 38A, 41A... Guide pin, 3
8B, 41B... Guide hole, 40... Cross head, 41... Pressure member, 48... Molding element means, 52
... Blank holder, 54... Drive means. Patent applicant: Kobe Steel, Ltd. (Figure 12) 3171

Claims (2)

[Claims] (1) A press force generating means (37) and a forming element means (48) are provided inside the press frame (30) that takes charge of press axial force.
are arranged vertically opposite to each other, and press force generating means (37
) side, the blank material (50) on the side of the forming element means (48)
In a double-acting press device equipped with a blank holder (52) for pressing, a cover body (38) is fixed to either the top or bottom of the press frame (30), and a crosshead (40) movable in the press axis direction is attached. The lid (38) is inserted into the cylinder chamber (39) with a length longer than the movable stroke of the crosshead (40), and the cylinder chamber (39) on the molding element means (48) side is inserted.
A press force generating means (37) is constructed by slidably inserting a pressure member (41) into the blank holder (52) on the side of the crosshead (40) facing the forming element means (48). ), and a pressure member (4
1) A double-acting press device characterized in that a drive means (54) is provided for moving a crosshead (40) having a blank holder (52) independently of the above. (2) Attach the lid (38) to either side of the press member (41) using guide pins (41A) (38A) in the press axis direction.
and the guide pin (41A) (38
A), and the guide pins (41A) (38A) and the guide holes (38B) (41B) are arranged at the end of the pressurizing stroke of the pressurizing member (41). The pressure member (41) is connected to the lid (38
2. The double-acting press device according to claim 1, wherein the double-acting press device is nestedly engaged in a relationship in which the press device is held in the press device.