JPH07236995A - Hydraulic press device - Google Patents

Abstract

PURPOSE:To miniaturize the device as a hydraulic press device exclusively using for pressing a cylindrical shape. CONSTITUTION:Both ends of a cylinder tube 1 are closed with lid plates 2, 3, and a piston 6 is installed freely slidingly inside this cylinder tube 1. An interval between one side lid plate 2 and the piston 6 is used as a pressurizing liquid room A. A space between the other side lid plate 3 and the opposing piston 6 is used as a die attaching room B. In a device installing an opening 8 for carrying in and out a die on the cylinder tube 1 of this die attaching room B, dies 9, 10 exclusively used for working the cylindrical shape are attached respectively on the piston 6 and the other side lid plate 3 by matching their centers.

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 when a cylindrical product is manufactured by cold forging, drawing or the like.

[0002]

2. Description of the Related Art In a conventional press machine, a mechanism for ensuring parallelism, such as a ram, a tie rod, or a straight side frame and a guide, is used to move a plate on which a mold is mounted in parallel, separately from a pressurizing force generating mechanism. Therefore, the conventional pressing device necessarily requires a large pressing device. Therefore, in order to reduce the size of the press machine, the present applicant has previously proposed, as Japanese Patent Application No. 5-58215, to extend a cylinder tube on the piston rod side of a hydraulic cylinder and attach a mold mounting plate to the end thereof. Stuck,
An opening is provided in the extension portion of the cylinder tube, and a mold is inserted from 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. A patent application has been filed for a hydraulic press device which is characterized in that it is possible.

[0003]

However, since the above-mentioned apparatus is required to have versatility for press working of products of any shape, miniaturization has not been achieved yet. There was a problem.

[0004]

In order to solve the above-mentioned problems, in 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 closed. A space between the plate and the piston is used as a pressurizing liquid chamber, a space between the other lid plate and the opposed piston is used as a mold mounting chamber, and the work is loaded into and unloaded from the cylinder tube of the mold mounting chamber. In a device provided with an opening for use, a hydraulic press device is configured by mounting a cylindrical mold exclusively for processing on the piston and the other cover plate with their centers aligned.

Further, a shaft fastening device comprising two tapered rings for fitting a shaft-shaped mounting portion of a die dedicated to the cylindrical processing of the above-mentioned device to the shaft portion and screws for pressing the rings. May be fixed by.

Further, a stepped recess is provided on the outer peripheral edge of the piston of the above-mentioned device on the side of the die mounting chamber, and packing is fitted into this recess, and a ring-shaped packing retainer for pressing this packing is attached to the piston. You may screw it on.

Further, a lid plate on the die mounting chamber side of the above-mentioned apparatus, a die clamp attached to the lid plate and a hole penetrating the die are provided, and a knockout die is provided in the hole. A knockout cylinder for driving the knockout die 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-mentioned apparatus.

Further, a fixed-side metal mold for cylindrical processing is fixed on one plate in a frame-shaped frame, and the other plate opposite to this is penetrated to penetrate the center of the mold and the center of the cylinder. Align the hydraulic cylinder that aligns with the mold, and align the center of the mold on the moving side with the center of the mold on the fixed side on the mold mounting plate provided at the end of the piston rod of this hydraulic cylinder You may comprise a hydraulic press apparatus so that it may be attached.

[0010]

As described above, in the present invention, the hydraulic press device is dedicated to the machining of the cylindrical shape, and the die dedicated to the machining of the cylindrical shape is aligned with the piston and the lid plate in the die mounting chamber. Since it is attached, the size can be reduced and the cost can be reduced as compared with the conventional general-purpose press device.

Further, according to the present invention, a shaft-shaped mounting portion of a die dedicated to machining a cylindrical shape is fastened with two tapered rings fitted to the shaft portion and screws for pressing the rings. Since it can be fixed by the device,
The center alignment of the mold is good, and the mold can be easily and reliably attached and detached by operating the pressing screw of the ring, which facilitates mold replacement and maintenance, and at the There is an advantage that it is also useful for downsizing and weight reduction.

Further, in the present invention, a stepped recess is provided at the outer peripheral edge of the piston on the side of the die mounting chamber, and packing is fitted in the recess and a ring-shaped packing retainer for pressing the packing is provided on the piston. Since the screws are screwed on, it is easy to replace the packing, which makes maintenance very easy.

In the present invention, a lid plate on the die mounting chamber side, a die clamp attached to the lid plate and a hole penetrating the die are provided, and a knockout die is provided in the hole. Since the knockout cylinder for driving the knockout die is provided outside the lid 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 and the cover plate in the mold mounting chamber, the piston can be operated at high speed when there is no load.

Further, as shown in the second embodiment of the present invention, a fixed-side mold for cylindrical processing is fixed on one plate in a frame-shaped frame, and the other plate facing the fixed mold is fixed. A hydraulic cylinder that penetrates the center of the mold and the center of the cylinder is provided, and the moving mold is attached to the mold mounting plate provided at the end of the piston rod of the hydraulic cylinder. If the hydraulic press is configured so that it is mounted so that it is aligned with the center of the fixed mold, the mounting area of the mold is increased compared to the cylinder tube type press, so it is suitable for large molds. ing. Also, since this hydraulic cylinder has pressure chambers on both sides of the piston, there is no need for a sub-cylinder.
It is also possible to move back with just the hydraulic cylinder.

[0016]

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

Also, the one cover plate 2 and the piston 6
Between them is a pressurizing liquid chamber A, the space between the other lid plate 3 and the opposed piston 6 is a mold mounting chamber B, and the cylinder tube 1 of this mold mounting chamber B is filled with a workpiece. An opening 8 (see FIG. 1) for loading and unloading is provided.

According to the present invention, in the apparatus constructed as described above, the cylindrical molds 9 and 10 dedicated to machining are attached to the piston 6 and the other cover plate 3 with their centers aligned. That is, 11 is a pressure bearing plate provided inside the piston 6, and 12 is a movable die clamp provided in the center of the piston 6 in contact with the pressure bearing plate 11.
Is a bolt for fastening the clamp 12 to the piston 6.

Reference numeral 9 denotes a hole 12a provided at the center of the clamp 12.
(See Fig. 3) With a round rod-shaped moving side mold with the upper part inserted,
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 two tapered rings 14a and 14b for fitting the shaft-shaped mounting portion of the mold 9 to the shaft portion and the rings 14a and 14b. Is constituted by a pressing screw 14d that presses through the ring 14c.

Numeral 15 is a substantially cup-shaped fixed-side mold clamp provided by partially fitting it in the center of the lid plate 3 facing the mold mounting chamber B. The clamp 15 has a hollow cylindrical shape at the center. The stationary die 10 is fitted and fastened by the shaft fastening device 14. The shaft fastening device 14 has the same configuration as the shaft fastening device 14 of the movable die 9, although the diameter is different.

Further, a stepped recess 6a is provided on the outer peripheral edge of the piston 6 on the side of the die mounting chamber B, and a packing 16 is fitted into the recess 6a and a ring-shaped packing retainer 17 for pressing the packing 16 is provided. Is fixed to the piston 6 with a bolt 18 and screwed.

Further, a lid plate 3 on the side of the die mounting chamber B, a die clamp 15 attached to the lid plate 3 and a hole 19 penetrating the center of the die 10 are provided, and a round bar knockout is provided in the hole 19. The mold 20 is provided, and the knockout cylinder 21 for driving the knockout mold is fixedly provided on the outer side of the lid plate 3 via a spacer 22.

Further, a sub-cylinder 23 having a diameter smaller than that of the piston 6 for high-speed operation 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 cover plate 3, and the piston rod 2
A head member 23c provided at the end of 3b is in contact with a clamp 12 of a die fixed to the piston 6. Note that W in FIG. 2 is a processed work.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, an upper plate portion 24a and a bottom plate portion 24b are provided.
And the left and right side plate portions 24c are combined into a frame shape having a rectangular front shape to form a frame 24, and a fixed side metal plate is placed on a bottom plate portion 24b, which is one plate in the frame shape frame 24. A mold mounting plate 25 is provided, and a fixed mold (not shown) dedicated to machining a cylindrical shape is fixed on the plate 25.

Further, there is provided a hydraulic cylinder 26 which penetrates through the upper plate portion 24a which is the other plate facing the hydraulic cylinder 26 so that the center of the fixed mold and the center of the cylinder are aligned with each other. A die attachment plate 27 is provided at the end of the piston rod 26a of the above, and is attached to this plate 27 so that the center of the die on the moving side (not shown) is aligned with the center of the die on the fixed side. 2
6b is a cap of the cylinder 26, and 26c is a piston.

[0026]

As described above, in the present invention, the hydraulic press device is dedicated to the cylindrical processing, and the molds dedicated to the cylindrical processing are respectively the piston 6 and the cover plate 3 in the mold mounting chamber B. Since the centers are aligned and attached, the size can be reduced and the cost can be reduced as compared with the conventional general-purpose pressing device.

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

Further, in the present invention, a stepped recess 6a is provided on the outer peripheral edge of the piston 6 on the side of the mold mounting chamber B, the packing 16 is fitted in the recess 6a, and a ring for pressing the packing 16 is pressed. Since the packing-like presser foot 17 is screwed to the piston 6, the packing 16 can be easily replaced, and therefore the maintenance becomes very easy.

Further, in the present invention, the lid plate 3 on the mold mounting chamber B side, the mold clamp 15 attached to the cover plate 3 and the hole 19 penetrating the mold 10 are provided, and the knockout is made in the hole 19. Since the work die 20 is provided and the knockout cylinder 21 for driving the knockout die is provided outside the lid plate 3, the work W can be reliably pushed out.

Further, in the present invention, the sub-cylinder 23 for high speed operation is provided between the piston 6 in the mold mounting chamber B and the cover plate 3, whereby the piston 6 can be operated at high speed when there is no load. To improve work efficiency.

Further, as shown in the second embodiment of the present invention, a cylindrical fixed die for processing is fixed on one plate in a frame 24, and the other plate opposite to this is fixed. A hydraulic cylinder 26 is provided through which the center of the mold is aligned with the center of the cylinder, and a mold mounting plate 27 provided at the end of the piston rod 26a of the hydraulic cylinder 26 is provided with a mold on the moving side. If the hydraulic press is configured so that its center is aligned with the center of the mold on the fixed side, the mounting area of the mold will increase compared to the cylinder tube type press, so a large Suitable for molds. Further, in this hydraulic cylinder 26, both sides of the piston 26c serve as pressurizing chambers,
Since it is also possible to reciprocate only by the hydraulic cylinder 26 without providing a sub-cylinder, the number of constituent parts can be reduced accordingly, and the device can be simplified.

[Brief description of 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 vertical cross-sectional view of the hydraulic press device of the present invention.

3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is an external perspective view showing a second embodiment of the hydraulic press device of the present invention.

[Explanation of symbols]

 1 Cylinder tube 2, 3 Lid plate 4 Bolt 5 O-ring 6 Piston 7 Wear ring A Pressurizing liquid chamber B Mold installation chamber 8 Opening 9 Mold (moving side mold) 10 Mold (fixed side mold) 11 Pressure Supporting Plate 12 Clamp of Moving Side Mold 13 Bolt 14 Shaft Fastening Device 14a, 14b Tapered Ring 14c Ring 14d Pressing Screw 15 Fixed Side Mold Clamp 16 Packing 17 Packing Presser 18 Bolt 19 Hole 20 Knockout Metal Mold 21 Knockout cylinder 22 Spacer 23 Sub-cylinder W Work 24 Frame 25 Fixed side mold mounting plate 26 Hydraulic cylinder 27 Mold mounting plate

Claims (6)

[Claims] 1. A cylinder plate has both ends closed by cover plates, a piston is slidably provided in the cylinder tube, and a pressure liquid chamber is provided between the one cover plate and the piston. In a device in which the space between the lid plate and the opposed piston is used as a mold mounting chamber, and a cylinder tube in the mold mounting chamber is provided with an opening for loading and unloading workpieces, a mold dedicated to cylindrical processing is used. Is attached to the piston and the other cover plate with their centers aligned, respectively. 2. The two tapered rings for fitting the shaft-shaped mounting portion of the die for cylindrical machining of the apparatus according to claim 1 to the shaft portion, and the pressing screws for these rings. A hydraulic press device characterized in that it can be fixed by a shaft fastening device. 3. A ring-shaped packing for pressing the packing, wherein a stepped recess is provided in an outer peripheral edge of the piston of the apparatus according to claim 1 on the mold mounting chamber side, and the recess is fitted with the packing. A hydraulic press device characterized in that the presser foot is screwed to the piston. 4. A lid plate on the die mounting chamber side of the apparatus according to claim 1, a die clamp attached to the lid plate, and a hole penetrating the die, and a knockout die is provided in the hole. A hydraulic press device, characterized in that the knockout cylinder for driving the knockout die is provided outside the lid plate. 5. A hydraulic press device characterized in that a sub-cylinder for high-speed operation is provided between the piston and the cover plate of the mold mounting chamber of the device according to claim 1. 6. A fixed-side mold for cylindrical processing is fixed on one plate in a frame-shaped frame, and the center of the mold and the cylinder are penetrated through the other plate facing the fixed mold. Provide a hydraulic cylinder whose center is aligned, and align the mold on the moving side with the mold mounting plate provided on the end of the piston rod of this hydraulic cylinder so that its center aligns with the center of the mold on the fixed side. A hydraulic press device characterized in that it is attached to.