JP2659905B2 - Hydraulic press device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic press device used for producing a cylindrical product by cold forging or drawing.

[0002]

2. Description of the Related Art In a conventional press apparatus, a mechanism for ensuring parallelism of a ram, a tie rod, or a straight side frame and a guide for moving a plate for mounting a mold in parallel is provided separately from a pressing force generating mechanism. Therefore, the conventional press device necessarily required a large press device. Therefore, in order to reduce the size of the press device, the applicant of the present invention disclosed in Japanese Patent Application No. 5-58215, the cylinder tube on the piston rod side of the hydraulic cylinder was extended, and a mold mounting plate was attached to the end thereof. Sticks,
An opening is provided in the extension of the cylinder tube, and a mold is inserted through this opening so that one mold can be fixed to the end surface of the piston rod and the other mold is fixed to the mold mounting plate. We have applied for a hydraulic press machine which is characterized by being able to do so.

[0003]

However, since the above-described apparatus is required to have versatility capable of responding to press working of a product of any shape, miniaturization has not yet been sufficiently achieved. There was a problem.

[0004]

In order to solve the above-mentioned problems, according to the present invention, both ends of a cylinder tube are closed by lid plates, and a piston is slidably provided in the cylinder tube, and the one lid is provided. The space between the plate and the piston is a pressurizing liquid chamber, the space between the other lid plate and the opposed piston is a mold mounting chamber, and a work is carried into and out of a cylinder tube of the mold mounting chamber. In the apparatus provided with an opening for use, a hydraulic press apparatus is configured such that a mold exclusively for processing a cylindrical shape is attached to the piston and the other cover plate so that the centers thereof are aligned.

[0005] Further, a shaft-mounting device comprising a shaft-shaped mounting portion of a mold dedicated to cylindrical processing of the above-described device, two tapered rings fitted to the shaft portion, and a screw for pressing these rings. Alternatively, it may be possible to fix.

A stepped recess is provided at the outer peripheral edge of the piston of the above-described apparatus on the mold mounting chamber side, and packing is fitted into the recess, and a ring-shaped packing presser for pressing the packing is provided on the piston. It may be screwed.

Further, a cover plate on the side of the mold mounting chamber of the above-described apparatus, a mold clamp attached to the cover plate and a hole penetrating the mold are provided, and a knockout mold is provided in the hole. A knockout cylinder for driving a knockout mold may be provided outside the lid plate.

Further, a sub-cylinder for high-speed operation may be provided between the piston and the cover plate in the mold mounting chamber of the above-described apparatus.

[0009]

As described above, in the present invention, the hydraulic press device is dedicated to cylindrical processing, and the molds dedicated to cylindrical processing are aligned with the piston and the cover plate in the mold mounting chamber, respectively. Since the mounting is performed, the size can be reduced as compared with the conventional general-purpose press device, and the cost is reduced.

Further, in the present invention, a shaft-shaped mounting portion of a cylindrical mold dedicated to machining is provided by two tapered rings fitted to the shaft portion, and a shaft fastening comprising a screw for pressing the rings. Because it can be fixed by the device,
The center alignment of the mold is good, and the operation of the screw for pressing the ring allows the mold to be easily and reliably attached and detached. There is an advantage that it is also useful for reducing the size and weight.

In the present invention, a stepped recess is provided on the outer peripheral edge of the piston on the mold mounting chamber side, and a packing is fitted into the recess, and a ring-shaped packing presser for pressing the packing is provided on the piston. Since the packing is easily screwed, the replacement of the packing is easy, so that the maintenance becomes very easy.

In the present invention, a cover plate on the mold mounting chamber side, a mold clamp attached to the cover plate and a hole passing through the mold are provided, and a knockout mold is provided in the hole. Since the knockout cylinder for driving the knockout mold is provided outside the cover plate, the work can be reliably pushed out.

Further, in the present invention, since the sub-cylinder for high-speed operation is provided between the piston in the mold mounting chamber and the lid plate, the piston can be operated at high speed without load.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, both ends of the cylinder tube 1 are closed by lid plates 2 and 3. Reference numeral 4 denotes a bolt for fastening each of the cover plates 2 and 3 to the cylinder tube 1, and reference numeral 5 denotes an O-ring provided between the cover plate 2 and the cylinder tube 1. A piston 6 is slidably provided in the cylinder tube. Reference numeral 7 denotes a wear ring fitted on the outer peripheral surface of the piston 6.

The one cover plate 2 and the piston 6
Is defined as a pressurized liquid chamber A, the space between the other cover plate 3 and the opposed piston 6 is defined as a mold mounting chamber B, and the work of the workpiece is stored in the cylinder tube 1 of the mold mounting chamber B. An opening 8 (see FIG. 1) for loading and unloading is provided.

According to the present invention, in the apparatus configured as described above, the molds 9 and 10 dedicated to cylindrical processing are attached to the piston 6 and the other cover plate 3 with their centers aligned. That is, reference numeral 11 denotes a pressure support plate provided inside the piston 6, reference numeral 12 denotes a movable-side mold clamp provided at the center of the piston 6 in contact with the pressure support plate 11, and
Are bolts for fastening the clamp 12 to the piston 6.

9 is a hole 12a provided at the center of the clamp 12.
(See Fig. 3)
The mold 9 is fixed to the clamp 12 by a shaft fastening device 14. As shown in detail in FIG. 3, the shaft fastening device 14 includes a shaft-mounted portion of the mold 9 and two tapered rings 14a and 14b fitted to the shaft portion, and these rings 14a and 14b. Is constituted by a pressing screw 14d for pressing through a ring 14c.

Reference numeral 15 denotes a substantially cup-shaped fixed-side mold clamp provided by partially fitting the center of the cover plate 3 facing the mold mounting chamber B. The clamp 15 has a hollow cylindrical shape at the center. The fixed mold 10 is fitted and fastened by the shaft fastening device 14. The diameter of the shaft fastening device 14 is different from that of the shaft fastening device 14 of the movable die 9, but has the same configuration.

A stepped concave portion 6a is provided at the outer peripheral edge of the piston 6 on the side of the mold mounting chamber B. A packing 16 is fitted into the concave portion 6a, and a ring-shaped packing presser 17 for pressing the packing 16 is provided. Is provided on the piston 6 with screws 18.

Further, a cover plate 3 on the mold mounting chamber B side, a mold clamp 15 attached to the cover plate 3 and a hole 19 passing through the center of the mold 10 are provided, and a round bar knockout is provided in the hole 19. A metal mold 20 is provided, and a knockout cylinder 21 for driving the metal mold for knockout is fixed to the outside of the cover plate 3 via a spacer 22.

A sub-cylinder 23 for high-speed operation having a smaller diameter than the piston 6 is provided between the piston 6 facing the mold mounting chamber B and the cover plate 3. That is, in this embodiment, the base of the cylinder 23a is erected on the lid plate 3 and the piston rod 2
The head member 23c provided at the end of 3b is in contact with the mold clamp 12 fixed to the piston 6. Note that W in FIG. 2 is a processed workpiece.

[0022]

As described above, in the present invention, the hydraulic press device is dedicated to cylindrical processing, and the dies dedicated to cylindrical processing are respectively provided with the piston 6 and the cover plate 3 in the mold mounting chamber B. Since the mounting is performed in such a manner that the center is aligned with the center, the size can be reduced as compared with the conventional general-purpose press device, and the effect of reducing the cost can be obtained.

Further, in the present invention, a shaft-shaped mounting portion of a cylindrical mold dedicated to machining is provided with two tapered rings 14a and 14b fitted to the shaft portion, and a screw 14d for pressing these rings. Since the shaft can be fixed by the shaft fastening device 14, the center alignment of the mold is good, and the mold can be easily and reliably attached and detached by the operation of the ring pressing screw 14d. , Mold exchange and maintenance are easy,
There is an advantage that it is also useful for reducing the size and weight of the press device.

In the present invention, a stepped concave portion 6a is provided on the outer peripheral edge of the piston 6 on the mold mounting chamber B side, and a packing 16 is fitted into the concave portion 6a and a ring for holding the packing 16 is provided. The packing 16 is screwed to the piston 6 so that the packing 16 can be easily replaced, so that the maintenance becomes very easy.

Further, in the present invention, the cover plate 3 on the side of the mold mounting chamber B and the hole 19 passing through the mold clamp 15 and the mold 10 attached to the cover plate 3 are provided. Since the knockout cylinder 21 for driving the knockout mold and the knockout cylinder 21 are provided outside the lid plate 3, the work W can be reliably pushed out.

Further, in the present invention, a sub-cylinder 23 for high-speed operation is provided between the piston 6 of the mold mounting chamber B and the cover plate 3, so that the piston 6 can be operated at high speed without load. The work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a first embodiment of a hydraulic press device of the present invention.

FIG. 2 is a longitudinal sectional view of the hydraulic press device of the present invention.

FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder tube 2, 3 Cover plate 4 Bolt 5 O-ring 6 Piston 7 Wearing A Pressurized liquid chamber B Mold mounting chamber 8 Opening 9 Mold (mould on moving side) 10 Mold (mold on fixed side) DESCRIPTION OF SYMBOLS 11 Pressure bearing plate 12 Moving side mold clamp 13 Bolt 14 Shaft fastening device 14a, 14b Tapered ring 14c Ring 14d Pressing screw 15 Fixed side mold clamp 16 Packing 17 Packing retainer 18 Bolt 19 Hole 20 Knockout metal Mold 21 Knockout cylinder 22 Spacer 23 Subcylinder W Work

Claims (5)

(57) [Claims] 1. A cylinder tube having both ends closed by a lid plate, a piston slidably provided in the cylinder tube, a space between the one lid plate and the piston serving as a pressurizing liquid chamber, In a device in which the space between the lid plate and the opposed piston is a mold mounting chamber and an opening for loading and unloading the work is provided in the cylinder tube of the mold mounting chamber, a mold dedicated to cylindrical processing. Are mounted on the piston and the other cover plate, respectively, with their centers aligned. 2. A shaft-shaped mounting portion of a mold dedicated to processing a cylindrical shape of the device according to claim 1, comprising two tapered rings fitted to the shaft portion and screws for pressing these rings. A hydraulic press device characterized by being fixed by a shaft fastening device. 3. A ring-shaped packing for providing a stepped recess on the outer peripheral edge of the piston of the device according to claim 1 on the side of the mold mounting chamber, fitting the packing into the recess, and pressing the packing. A hydraulic press device characterized in that the presser is screwed to the piston. 4. The apparatus according to claim 1, further comprising a cover plate on the side of the mold mounting chamber, a mold clamp attached to the cover plate, and a hole penetrating the mold, and a knockout mold is provided in the hole. A hydraulic press apparatus comprising: a knockout cylinder for driving the knockout mold; and a knockout cylinder for driving the knockout mold. 5. A hydraulic press apparatus according to claim 1, wherein a sub-cylinder for high-speed operation is provided between the piston and the cover plate in the mold mounting chamber of the apparatus according to claim 1.