JP4276733B2 - Column type hydraulic press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a column-type hydraulic press in the press field.
[0002]
[Prior art]
As a hydraulic press, a column type is known in which a bed and an upper frame are connected by a column, a slide is slid along the column, and the column is moved up and down by a lifting cylinder.
[0003]
However, in the above, the cylinder rod of the elevating cylinder is attached to the slide in parallel with the column and the slide is moved up and down, and the cost is increased by using both the column and the cylinder rod.
[0004]
[Problems to be solved by the invention]
For this reason, there is known a technique in which a slide guide rod is omitted and a pressure cylinder is arranged on the slide, and the slide is moved up and down using the cylinder rod of the pressure cylinder as a column for press molding.
[0005]
However, when the slide is moved up and down with the cylinder, the lifting accuracy depends on the sliding accuracy of the piston due to the dimensional tolerance of the cylinder and the inclination of the four columns, and the slide is caused by the gap necessary for the cylinder to operate and the inclination of the upper part of the column. Therefore, the planar positional accuracy is not good, for example, it is inclined as much as 2.5 mm with respect to the slide width of 3350 m.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above points, and in order to solve the above-described problems, the pressure cylinders are arranged at the four corners of the slide, and the entire part of the cylinder is integrally provided with the slide. The piston rod protrudes upward and downward from the piston of the pressure cylinder as an upper column and a lower column, respectively, and a guide bush is mounted on the sliding part of the slide of the upper column and the lower column, so that the entire cylinder of the pressure cylinder is part fixed slides as an integral and vertically movable along said column and is fixed vertically lower the bed of the lower column, along said column fixed vertically to the crown of the upper portion of the column above The slide that fixed the whole part of the cylinder of the pressure cylinder as a unit is precisely raised and lowered and press-molded. We provide a column-type hydraulic press.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The column type hydraulic press according to the present invention includes a pressurizing cylinder at four corners of a slide and an entire part of the cylinder as an integral part of the slide, and a piston rod vertically extending from the piston of the pressurizing cylinder. the wearing the guide bush to the sliding portion of the slide of the upper column and the lower column protrude respectively as an upper column and a lower column, along a slide fixed as an integral whole portion of the cylinder of the pressure cylinder to the column The lower part of the lower column is fixed vertically to the bed, and the upper part of the column is fixed vertically to the crown, and the whole cylinder of the pressure cylinder is fixed integrally along the column. It is characterized in that the slide is precisely lifted and press-molded.
[0008]
The column type hydraulic press 1 of the present invention is a column type using a hydraulic cylinder as shown in FIGS. 1 and 2, and has a predetermined output at the four corners of the slide 2 having a required rigidity as shown in the figure. The pressure cylinder 3 is axisymmetrically arranged and the cylinder 4 is fixed to the slide 2 with the whole cylinder of the pressure cylinder being integrated, and the piston rod of the pressure cylinder 3 is arranged in the vertical direction of the piston 5. An upper column 6 and a lower column 7 project from the piston 5.
[0009]
Then, the lower part of the lower column 7 is inserted into the four corners of the bed 8 for a predetermined length and fixed vertically as shown in FIG. 1, and the upper end of the upper column 6 is fixed as shown in FIGS. A double rod type column structure in which the rods penetrate the piston 5 through the pressurizing cylinder 3 of the hydraulic cylinder, which is vertically fitted at the four corners of the crown 9 having the required rigidity and fixed firmly with a lock pin or the like. It is what is being pressed.
[0010]
Further, guide bushes 10 and 11 are mounted on the sliding portions of the slide 2 of the upper column 6 and the lower column 7 of the pressure cylinder 3, respectively, as shown in FIGS. The sliding state of the slide 2 is set within a tolerance as small as possible, and the slide 3 is moved up and down while maintaining a precise horizontal state.
[0011]
In addition, a slide drop prevention device 12 is attached to the center of the crown 9 to which the above four upper columns 5 are fixed, as shown in FIG. 1, and the upper part of the slide 2 is clamped or a rod is inserted when necessary. To prevent the slide 2 from falling naturally, so that the mold can be attached and detached safely.
[0012]
As such a hydraulic press, a pressurizing cylinder can be used to pressurize and lift a slide, but it is not excluded to use a pulling cylinder together.
[0013]
In addition, a hydraulic tank can be mounted on the crown, and in this case, the bottom structure of the tank is preferably a structure that also serves as a crown. In addition, the space inside the slide can be actively used to serve as a hydraulic tank.
[0014]
【Example】
1 to 3 show an embodiment of the present invention, which is implemented in a 5000 ton hydraulic press. The slide 2 had a size of 3350 × 2700 × 1500 mm and a stroke of 900 mm.
[0015]
As a result of lifting thus formed slide 2 fixed integrally the entire portion of the pressurized cylinder 3 to the hydraulic oil of the pressure cylinder 3 out inlet cylinder 4 arranged as shown in FIG. 3, the slide 2 The inclination was within 0.8 mm with respect to the slide width of 3350 mm, and sufficient accuracy was obtained.
[0016]
The rod diameter of the pressurizing cylinder is as large as 80-95% of the piston as much as possible to reduce the amount of hydraulic oil flowing in and out, and the rod is made to be a middle protrusion to reduce weight. Appropriate modifications can be implemented based on the spirit of the invention.
[0017]
【The invention's effect】
As described above, in the present invention, the pressure cylinders are arranged at the four corners of the slide so that the whole part of the cylinder is integrally formed with the slide, and the piston rod is vertically moved from the piston of the pressure cylinder. The upper column and the lower column protrude, and a guide bush is attached to the sliding part of the upper column and lower column slides. The lower part of the lower column is fixed vertically to the bed, and the upper part of the column is fixed vertically to the crown, and the whole cylinder of the pressure cylinder is fixed integrally along the column. Since the slide is precisely raised and lowered and press-molded, the entire cylinder is integrated with the slide. Can lift the slide along the column that protrudes above and below the pressurized cylinder, a column-type slide can remove upright to slide as a general hydraulic press with the press can be constructed, the inclination of the slide sufficiently It can be moved up and down precisely.
In particular, the upper and lower column slides are fitted with guide bushes so that the slide can be moved up and down along the upper and lower columns together with the cylinder of the pressurizing cylinder. The slide can be moved up and down while maintaining a precise horizontal state by keeping the state precisely constant and keeping the tilt of the slide within the smallest possible tolerance.
Since the lower part of the lower column of the pressure cylinder is fixed vertically to the bed and the upper part of the column is fixed vertically to the crown, the column can be firmly supported, and along the column, as described above. The slide can be moved up and down precisely.
[0018]
In addition, pressure cylinders are arranged symmetrically at the four corners of the slide, the upper column of the column penetrating the piston is at the four corners of the upper crown, and the lower end of the lower column is at the four corners of the bed. It is fixed to each part, and the slide of the cylinder with the cylinder of the pressure cylinder can be moved up and down along the upper and lower columns, so that a double rod type column structure with an upper column and a lower column penetrating the piston of the pressure cylinder is formed. The slide can be moved up and down precisely.
[0019]
Also, by attaching a slide fall prevention device to the crown and detachably attaching the slide, the slide can be easily prevented from falling when not pressed, and the mold can be replaced safely.
[0020]
Furthermore, by using a structure that also serves as a hydraulic tank, the space of the hydraulic tank can be saved and the column-type hydraulic press can be made more compact.
[Brief description of the drawings]
FIG. 1 is a drawing for explaining an outline of an embodiment of the present invention;
FIG. 2 is a plan view of the above,
FIG. 3 is a half sectional view for explaining a slide lowered state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hydraulic press 2 ... Slide 3 ... Pressure cylinder 4 ... Cylinder 5 ... Piston 6 ... Upper column 7 ... Lower column 8 ... Bed 9 ... Crown

Claims (4)

The pressurized cylinder at four corners of the slide as well as arranged respectively as an integral whole unit to slide the cylinder, the upper projecting respectively piston rod vertically from the piston of the pressurized cylinder as the upper column and a lower column A guide bush is attached to the slide part of the slide of the column and the lower column, and the slide in which the entire cylinder of the pressure cylinder is fixed integrally is made to be movable up and down along the column.
While fixing the lower part of the lower column vertically to the bed, the upper part of the column is fixed vertically to the crown, and the entire cylinder part of the pressurizing cylinder is integrally fixed along the column. A column-type hydraulic press characterized by being raised and lowered and press-molded. Pressure cylinders are arranged symmetrically at the four corners of the slide, the upper column of the column penetrating the piston is at the four corners of the upper crown, and the lower end of the lower column is at the four corners of the bed. The column-type hydraulic press according to claim 1, wherein the column-type hydraulic press is fixed, and the slide is movable up and down along the upper and lower columns together with the cylinder of the pressure cylinder.   The column type hydraulic press according to claim 1 or 2, wherein a slide fall prevention device is attached to the crown so that the slide is detachably attached.   The column type hydraulic press according to any one of claims 1 to 3, wherein the slide has a structure also used as a hydraulic tank.

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