JPH0220698A - Press machine - Google Patents

Abstract

PURPOSE:To obtain a press machin fully possible to resist eccentric load by providing a cylinder chamber in a crosshead and inserting not only a cap but a pressure member from a fixed side into this cylinder chamber. CONSTITUTION:The press machine provides opposingly a pressing power generating means 37 and a forming element means 48 on the upper and the lower stage inside the press frame 30 in charge of the spindle force of the press and, further, prepares a means 37 to slide and guide a crosshead 40 in the direction of the press spindle. A cap 38 is fixed to one of the upper or the lower side of this press frame 30, the cap 38 is inserted beyond a movable stroke of a crosshead 40 into a movable cylinder chamber 39 of the crosshead 40 movable in the direction of the press spindle and a pressure member 41 is inserted freely slidably into the cylinder chamber 39 on the side of a forming element means 48 to constitute the pressing power generating means 37.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a 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 blank materials such as steel plates, 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, and a cross There is a press device that includes a guide means for slidingly guiding a head in the press axis direction.

This press apparatus will be outlined with reference to FIGS. 9 to 12.

In FIGS. 9 to 12, reference numeral 1 denotes a press frame, which is shown in the form of a wire wound shape with piano wire 2 wound around its outer periphery. Reference numeral 3 indicates an upper pressure receiving plate, and 4 indicates a lower pressure receiving plate, which are fixed facing each other above and below 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 peripheral collar 9 at its axial midway point and is inserted into the cylindrical part 11 of the crosshead 10 below the cylinder 7. ing.

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 non-kout 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 blank holder driving cylinder device, 19 is a balance cylinder device, and 20 is a crosshead lifting cylinder 7.
Among them, 21 is a crosshead guide means.

In this prior art, the blank material 17 on the mold member 14 is
By operating the blank holder driving cylinder device 18, the crosshead 10 and blank holder 16 are lowered to press down the outer circumference of the blank material 17, and then, by applying hydraulic pressure (hydraulic pressure) inside the cylinder 7, the main ram 8 is lowered, and the lower end of the main ram 8 enters the forming section 13 to form a predetermined shape.

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

(Problems to be Solved by the Invention) In the prior art shown in FIGS. 9 to 12, 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, regardless of the above-mentioned problems, technically the press frame 1 is responsible for the press axial force, so this press frame 1
The fact that the cylinder 7 and the crosshead 10 are arranged vertically inside the press frame 1 increases the deformation of the press frame 1. Therefore, it is necessary to make the press frame 1 stronger than necessary or to reduce the amount of press force. This may cause problems such as
These defects must be resolved regardless of whether the press frame 1 is column-shaped or wire-wound, but especially wire-wound shapes deform during wire winding and loading (forming work). Therefore, it becomes a serious problem.

Further, as shown in FIG. 12, when the forming part 13 has an inclined surface part, an eccentric load is generated during forming, and a bending moment is generated due to this, and the lateral direction accompanying this bending moment is The load will be received by the gate-shaped crosshead guide means 18, but since the support parts 18A and 18B of this guide means 18 are vertically separated from each other by a large distance, the guide rod 18C in the guide means 18 is made to have a large diameter. In particular, there was a risk that it would become unusable with a wound vA (wire wound) frame frame having weak lateral rigidity.

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. By making the press frame smaller and thereby suppressing deformation of the press frame, and by providing a lateral support function through cooperation between the crosshead guide means and the lid body, it is possible to sufficiently withstand eccentric loads. The main purpose is to

(Means for Achieving the Object) The present invention provides a press force generating means 37 and a forming element means 48 which are disposed vertically opposite to each other inside a press frame 30 which takes charge of press axial force, and a crosshead In a press device equipped with a guide means 57 for slidingly guiding 40 in the press axis direction, the following technical measures are taken to achieve the stated purpose.

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 guide rod 58 extending from the cross head 40 in the direction of the repress axis is connected to either the upper or lower fixed side 3.
5. constitutes a gate-shaped guide means 57 which is fitted into the support holes 35A and 36A formed in 36 and serves as a lateral load support part;
This is characterized in that a lateral load support portion spaced apart from the support holes 35^, 36A in the press axial direction is formed on the lid body 38 which is fitted into the cylinder chamber 39.

(Function) According to the present invention, the lid body 38 is fixed to either the upper or lower side of the press frame 30, and the cross head 4 is movable in the press axis direction.
The cover body 38 is placed in the cylinder chamber 39 of the cross head 4.
0 movable stroke or more, and further,
The press force generating means 37 is configured by slidably fitting the pressurizing member 41 into the cylinder chamber 39 on the forming element means 48 side. This reduces the press height.

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, since the lid body 38 is fixed, the pressure member 4
A thrust force is applied to the blank material 50, and the blank material 50 is formed using the pressure member 41 as a male mold.

In forming this blank material 50, as shown in FIG. 8, when the forming part 49 has an inclined surface part, a bending moment is generated due to the forming reaction force F and the eccentricity e caused by the press force (for other reasons. However, a bending moment still occurs).

A reaction force f is required against the lateral force caused by this bending moment, but since the guide means 57 is gate-shaped, the lower side of the support hole 36A is inserted into the cylinder chamber 39 of the lid 38. The reaction force f is created by the bending moment, and the distance it is separated in the press axis direction is shortened because the part where the lid body 38 is fitted into the cylinder chamber 39 serves as a lateral load support part. This means that the lateral force can be reduced and handled reliably.

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

In the first embodiment shown in FIGS. 1 to 4, 30 is a press frame, which includes a pair of semicircular yokes 31 and 32;
a column 33 connecting the yokes 31 and 32 to each other;
A piano wire group 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 joined at a boundary, etc., and a cylinder chamber 39 is formed on the inner peripheral surface of the inner cylindrical member 45 with a mirror finish. The lid body 38 is inserted into the cylinder chamber 39.
A sealing member 46 is provided on the outer periphery.

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 of the crosshead 40. It is said to be longer than that.

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.

Reference numeral 48 denotes a molding element means, in which a mold member 50'' having a molding portion 49 is removably attached to the lower receiving plate 36, and a pressurizing member 41 can enter into the molding portion 49.

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. and a piston rond part 56 that is fitted into the piston and moved up and down by fluid pressure (hydraulic pressure).
The long top 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 equipped 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, and
A small diameter shaft portion 66 is inserted through the stepped portion 65 and fastened with a nut 67. Here, as shown in FIG. 8, the gate-shaped guide means 57 has an upper side that supports the lateral load at the insertion part of the lid 38 into the cylinder chamber 39, and a lower side that uses the support hole formed in the lower receiving plate 36. 36A serves as a lateral load support portion, and its vertical distance ML is made small to minimize deformation of the press frame 30 and the like even if a bending moment occurs due to an eccentric load.

The operation of the first embodiment described above will be explained with reference to FIG. 5. FIG. 5 (1) shows an initial state in which a blank material 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 49 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 is guided without coming out of the lid 38.

Next, fluid pressure (
By applying hydraulic pressure (hydraulic pressure), the pressure member 41 is lowered and enters the molding section 49, where a predetermined press molding is performed using the molding section 49 as a female mold and the pressure member 41 as 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 since the cylinder chamber 39 of the crosshead 40 is built in as the press force generating means 37, the pressure in the height direction is The size of the press frame 30 is reduced, and deformation of the press frame 30 is suppressed.

When an eccentric load is applied during this press forming,
The lateral load is supported by the guide means 57 in the following manner.

In other words, as shown in FIG. 8, since it is a reaction force to the eccentric load, the distance between the supporting parts can be shortened and the bending moment can be reduced without increasing the thickness of the column 33 or the diameter of the guide rod 58. It will also be able to withstand.

Note that the spherical bearing 64 has a function of always correcting the guide rod 58 in the vertical direction with respect to the lower support plate 36.

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 present invention, in which the press frame 3
0 is a column formed by fastening and connecting a top platen 131 and a bottom platen 132 with a plurality of columns 133 and nuts 134, and since the basic structure and operation are the same as those of the first embodiment, the common parts are are indicated by common symbols. Although not shown in the second embodiment, the gate-shaped guide means of the crosshead 40 is provided as described above.

FIG. 7 shows another embodiment of the present invention in which the guide means 57 is changed, and the guide rod 5 is extended upward from the cross head 40 and slidably into the guide hole 35 formed in the upper receiving plate 35. The guide hole 35A is inserted through the lid body 3, and the guide hole 35A is used as a support part, and the guide hole 35A and the lid body 3
By making the insertion part for the cylinder chamber 39 of No. 8 a supporting part in the lateral direction (horizontal direction), the span L between the upper and lower supporting parts can be shortened, and it is effective against bending moments caused by eccentric loads. The press frame 30 is designed so that no lateral reaction force is generated against the eccentric load.

To explain this point with reference to FIG. 8, for example, when the forming part 49 has an inclined surface part (an eccentric load occurs for other reasons as well), the blank material 50 is press-formed. The unavoidable eccentric load and the resulting reaction force F
This eccentric load generates a bending moment FXe, and the lateral load due to this bending moment is not received at the insertion part of the lid 38 on the upper side (FXe=fx
L), on the lower side, the lower support Fi of the guide loft 58
The receiver is stopped at 36 supporting parts 36A.

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, it is not necessary to increase the diameter, cross-sectional area, etc. of the columns 33 and 133. It is made to endure.

Note that the spherical bearing 64 functions so that the guide rod 58 always faces 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 4B is provided in the lower part in the press frame 30, so the arrangement may be upside down. Further, the press frame 30 may be of a wound shape, a column shape, a steel plate laminated shape, or the like.

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

A lid body is fixed to either the upper or lower side of the press frame, and the lid body is inserted into the cylinder chamber of a crosshead movable in the axial direction of the press with a length equal to or longer than the movable stroke of the crosshead, and further, Since the press force generating means was constructed by slidably fitting the pressurizing member into the cylinder chamber on the side of the forming element means, the press force generating means was built into the crosshead, and here This makes it possible to reduce the amount of deformation of each part including the press frame.

Along with this, not only can the guide means of the crosshead be simplified and the handling efficiency such as replacement of the seal member improved, but also maintenance can be performed easily and accurately, resulting in a molded product of high quality.

Furthermore, a guide rod extending from the crosshead in the press axial direction is inserted into a support hole formed on either the upper or lower fixed side to form a gate-shaped guide means serving as a lateral load support part. Since a lateral load support part spaced apart in the axial direction of the press is formed on the lid that is inserted into the cylinder chamber, the guide means has a function of guiding the crosshead and supporting a lateral load due to the bending moment due to eccentric load. It is advantageous to be able to hold the

At this time, the upper and lower lateral load supporting parts are fitted with a lid fixed to the cylinder chamber of the crosshead, and this fitting part is used as the supporting part, so the distance in the press axial direction of the upper and lower supporting parts is short. As a result, it is possible to obtain high lateral rigidity without increasing the cross-sectional shape of each member, which is particularly advantageous for a wire-wound frame.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention and a conventional example, and FIGS. 1 to 4 show the first embodiment of the present invention, FIG. 1 is an elevational sectional view, and FIG. 2 is a partially cutaway front view. Figure 3 is Figure 9 C-C
Line sectional view, Figure 4 is BBwA sectional view in Figure 1, Figure 5 (1
1 to 5 (5) are process elevation views showing the press cycle of the first embodiment of the present invention, FIG. 6 is an elevation sectional view of the second embodiment of the present invention, and FIG. 7 is a process elevation view of the press cycle of the first embodiment of the present invention. FIG. 8 is an elevational sectional view showing the behavior of the embodiment of the present invention against eccentric loads, FIG. 9 is an elevational sectional view of the conventional example, and FIG. 10 is FIG. 9C- FIG. 11 is a sectional view taken along line C--C in FIG. 9, and FIG. 12 is a schematic elevational view of a conventional example. 30... Press frame, 35A, 36A... Lateral load support section, 37... Press force generating means, 38... Lid body, 40... Cross head, 41... Pressure member, 4
8... Molding element means, 52... Blank holder, 5
4...Driving means. 57...Portal guide means. Figure 12

Claims (1)

[Claims] (1) A press force generating means 37 and a forming element means 48 are disposed vertically facing each other inside the press frame 30 that takes charge of press axial force, and the cross head 40 is slidably guided in the press axial direction. In the press device equipped with the guide means 57, the lid body 38 is fixed to either the upper or lower side of the press frame 30,
Cylinder chamber 3 of crosshead 40 movable in the axial direction of the press
9, the lid body 38 is inserted with a length longer than the movable stroke of the crosshead 40, and the molding element means 48
The press force generation means 37 is constructed by slidably fitting the pressure member 41 into the side cylinder chamber 39, and the guide rod 58 extending from the cross head 40 in the press axial direction is connected to either the upper or lower side. A gate-shaped guide means 57 is formed by fitting into the support holes 35A and 36A formed in the fixed sides 35 and 36 to serve as a lateral load support part, and the support hole 35
A press apparatus characterized in that a lateral load support part spaced apart from A and 36A in the press axial direction is formed on a lid body 38 that is fitted into a cylinder chamber 39.