CN112356232A

CN112356232A - Multi-frame hydraulic press

Info

Publication number: CN112356232A
Application number: CN202011096103.4A
Authority: CN
Inventors: 邓耀顺; 谈建豪; 梁德成
Original assignee: Foshan Henglitai Machinery Co Ltd
Current assignee: Foshan Henglitai Machinery Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-02-12

Abstract

The invention discloses a multi-frame hydraulic machine, which comprises a main oil tank, a flat oil tank, a frame, an oil cylinder, a piston, a movable beam and a base plate, wherein the main oil tank is connected with the flat oil tank; the main oil tank is arranged at the top of the frame, and more than two frames are connected through a pull rod; a working cavity is arranged in the center of the frame, and the oil cylinder is arranged in the working cavity and is abutted against the upper wall of the working cavity; the flat oil tank is arranged between the two frames and is connected with the main oil tank and the oil cylinder; the piston is matched with the oil cylinder, and the movable beam is arranged at the lower end of the piston; the backing plate is arranged in the working cavity and is abutted against the lower wall of the working cavity. The flat oil tank has a long and narrow flow cross section, can reduce the distance between the frames under the condition of ensuring that the flow cross section area is enough, and improves the overall strength and the pressing stability of the frames.

Description

Multi-frame hydraulic press

Technical Field

The invention relates to a hydraulic machine, in particular to a multi-frame hydraulic machine.

Background

The structure of the currently known multi-frame hydraulic machine is as follows: the frame of the hydraulic press consists of a plurality of frames, and is pre-tightened by a pull rod and a nut; the oil tank is arranged above the outer part of the frame; the main cylinder system consists of an oil cylinder, a piston and a flange and is arranged above the inside of the frame; the cylinder is connected with the oil tank and the oil cylinder and is arranged in the middle of the frame and the frame; the liquid filling valve is arranged inside the oil cylinder; the movable beam is connected with the piston and is arranged below the piston; the backing plate is mounted below the interior of the frame.

The working principle and the process are as follows: when pressing action is required, the liquid filling valve is opened, hydraulic oil in the oil tank enters a piston cavity of the oil cylinder through the cylinder and the liquid filling valve, so that the piston drives the movable beam to descend quickly, and quick die assembly is realized; then, the prefill valve is closed and pressurized oil from the system enters the piston chamber of the cylinder through a dedicated oil passage to effect a pressing action. After pressing is finished, the liquid filling valve is opened again, system pressure oil enters a rod cavity of the oil cylinder, the piston drives the movable beam to ascend to realize demolding, and hydraulic oil in the piston cavity returns to the oil tank through the cylinder.

According to the technical background, in the working process of the hydraulic machine, hydraulic oil must pass through the cylinder, the cylinder is an important channel for connecting the oil tank and the oil cylinder, when the sectional area of the cylinder is too small, the resistance of the hydraulic oil in flowing is increased, the hydraulic oil can flow unsmoothly, and the response speed of the hydraulic machine is directly reduced. Therefore, a designer must select a cylinder with a sectional area matched with that of the oil cylinder according to the size of the oil cylinder during design. The size of the oil cylinder can be increased along with the increase of the tonnage of the press, the larger the oil cylinder required by the press with larger tonnage is, the larger the flow cross-sectional area of the cylinder needs to be correspondingly increased. Along with the improvement of the quality requirement of the ceramic tile in the market and the development of the ceramic tile production technology, the requirement of a large-tonnage press is higher and higher. Increasing the diameter of the cylinder, while solving the problem of matching the cross-sectional area of the cylinder, can result in an increase in the distance between the frame and the frame, and thus can lead to adverse effects: the suspended sections of the oil cylinder and the base plate can be lengthened, the bending deformation resistance of the oil cylinder and the base plate is weakened, and the pressing precision is finally influenced.

Disclosure of Invention

The invention provides a multi-frame hydraulic press for solving the technical problem that the existing cylindrical oil cylinder occupies a large transverse space, and the multi-frame hydraulic press can reduce the distance between frames under the condition of ensuring enough through-flow sectional area and improve the overall strength and pressing stability of the frames.

In order to solve the technical problem, the invention provides a multi-frame hydraulic machine which comprises a main oil tank, a flat oil tank, a frame, an oil cylinder, a piston, a movable beam and a base plate, wherein the main oil tank is connected with the flat oil tank; the main oil tank is arranged at the top of the frame, and more than two frames are connected through a pull rod; a working cavity is arranged in the center of the frame, and the oil cylinder is arranged in the working cavity and is abutted against the upper wall of the working cavity; the flat oil tank is arranged between the two frames and is connected with the main oil tank and the oil cylinder; the piston is matched with the oil cylinder, and the movable beam is arranged at the lower end of the piston; the backing plate is arranged in the working cavity and is abutted against the lower wall of the working cavity.

As an improvement of the scheme, more than two liquid filling valves are arranged in the flat oil tank and are used for controlling the connection and disconnection between the flat oil tank and the oil cylinder.

As an improvement of the scheme, the horizontal section of the flat oil tank is in a runway shape.

As an improvement of the scheme, the main oil tank is cylindrical, square or spherical and is supported at the top end of the frame.

As an improvement of the scheme, the frame is an integrated metal frame or a steel wire winding type frame.

As an improvement of the scheme, the liquid filling valves are symmetrically distributed on two sides of the symmetric center by taking the horizontal center of the oil cylinder as the symmetric center.

As an improvement of the scheme, the movable beam is used for installing an upper die, and the base plate is used for installing a lower die.

The implementation of the invention has the following beneficial effects:

the flat oil tank that this application provided has long and narrow circulation cross-section, can reduce the distance between the frame under the sufficient circumstances of assurance through-flow cross-sectional area, improves the bulk strength and the suppression stability of frame. By adopting the design, the distance between the frames can be reduced, the stress condition of the oil cylinder and the base plate is improved, the thickness of parts such as the movable beam and the base plate can be reduced, the height of the frames is reduced, and the cost is saved. After the flat oil tank is used, the hydraulic press is more compact, and the occupied space of the whole machine is less.

Drawings

FIG. 1 is a schematic structural diagram of a multi-frame hydraulic machine according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the AA side of FIG. 1;

FIG. 3 is a cross-sectional view taken along the plane BB of FIG. 1;

FIG. 4 is a schematic structural view of another embodiment of the frame and flat fuel tank of the present invention;

FIG. 5 is a schematic structural diagram of a second embodiment of the multi-frame hydraulic machine of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.

As shown in fig. 1-3, a first embodiment of the invention provides a multi-frame hydraulic machine, which comprises a main oil tank 1, a flat oil tank 2, a frame 3, an oil cylinder 4, a piston 5, a movable beam 6 and a base plate 7; the main oil tank 1 is arranged at the top of the frame 3, and more than two frames 3 are connected through a pull rod 8; a working cavity 31 is arranged in the center of the frame 3, and the oil cylinder 4 is arranged in the working cavity 31 and is abutted against the upper wall 311 of the working cavity 31; the flat oil tank 2 is arranged between the two frames 3, and the flat oil tank 2 is connected with the main oil tank 1 and the oil cylinder 4; the piston 5 is matched with the oil cylinder 4, and the movable beam 6 is arranged at the lower end of the piston 5; the shim plate 7 is arranged in the working chamber 31 and abuts against the lower wall 312 of the working chamber 31. The movable beam 6 is used for installing an upper die, and the backing plate 7 is used for installing a lower die. The shape of the main oil tank 1 can be changed according to the requirement, such as a cylinder, a square or a ball, and the like, and the main oil tank is supported at the top end of the frame 3. And a liquid filling valve 21 is arranged at the bottom of the flat oil tank 2.

The working principle of the application is as follows: when pressing action is required, the liquid filling valve 21 is opened, hydraulic oil in the main oil tank 1 passes through the flat oil tank 2 and enters a piston cavity of the oil cylinder 4 through the liquid filling valve 21, so that the piston 5 drives the movable beam 6 to descend quickly, and quick die assembly is realized; then, the charge valve 21 is closed and pressurized oil from the system enters the piston chamber of the cylinder 4 via a dedicated oil passage to perform a pressing action. After pressing is finished, the liquid filling valve 21 is opened again, system pressure oil is introduced into a rod cavity 41 of the oil cylinder 4, the piston 5 drives the movable beam 6 to ascend to realize demoulding, and hydraulic oil in the cavity of the piston 5 returns to the main oil tank 1 through the flat oil tank 2. The flat oil tank 2 has a long and narrow flow cross section, and can reduce the distance between the frames 3 under the condition of ensuring that the flow cross section is enough, thereby improving the overall strength and the pressing stability of the frames 3. By adopting the design, the distance between the frames 3 can be reduced, the stress conditions of the oil cylinder 4 and the backing plate 7 are improved, the thicknesses of parts such as the movable beam 6, the backing plate 7 and the like can be reduced, the height of the frames 3 is reduced, and the cost is saved. After the flat oil tank 2 is used, the hydraulic press is more compact, and the occupied space of the whole machine is less.

The horizontal section of the flat oil tank 2 is in a runway shape, namely the flat oil tank 2 is composed of a central rectangular part 22 and semicircular parts 23 positioned on two sides of the rectangular part 22, and the runway-shaped flat oil tank 2 has no edges, so that the oil tank is not easily damaged due to collision during installation. Preferably, more than two liquid filling valves 21 are arranged in the flat oil tank 2, and the liquid filling valves 21 are used for controlling the on-off between the flat oil tank 2 and the oil cylinder 4. Preferably, the liquid filling valves 21 are symmetrically distributed on two sides of the symmetric center by taking the horizontal center of the oil cylinder 4 as the symmetric center.

Preferably, the frame 3 is a one-piece metal frame 3, or a steel wire wound frame 3.

With reference to fig. 4, preferably there may be 3 frames 3, and a flat oil tank 2 is provided between each two frames 3.

With reference to fig. 5, according to a second embodiment of the present invention, the difference from the first embodiment is that the flat oil tank 2 is provided with a plurality of independent circular oil supply pipelines 9, the circular oil supply pipelines 9 are connected to the main oil tank 1 and the oil cylinders 4, and the circular oil supply pipelines 9 are symmetrically distributed on two sides of the symmetric center with the horizontal center of the oil cylinders 4 as the symmetric center. Adopt the structure that this embodiment provided, the different positions of hydro-cylinder 4 provide hydraulic oil through the circular oil supply pipe 9 of difference, at the in-process that piston 5 goes up and down fast, hydraulic oil can be according to regional evenly through the circular oil supply pipe 9 that corresponds and go out hydro-cylinder 4, the resistance that piston 5 goes up and down in-process hydraulic oil produced is comparatively balanced, prevent that piston 5 lift in-process from leading to the eccentric friction of piston 5 and hydro-cylinder 4 because the pressure of hydraulic oil is inhomogeneous in the hydro-cylinder 4, cause piston 5 abnormal wear, extension piston 5's working life.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A multi-frame hydraulic press is characterized by comprising a main oil tank, a flat oil tank, a frame, an oil cylinder, a piston, a movable beam and a base plate;

the main oil tank is arranged at the top of the frame, and more than two frames are connected through a pull rod;

a working cavity is arranged in the center of the frame, and the oil cylinder is arranged in the working cavity and is abutted against the upper wall of the working cavity;

the flat oil tank is arranged between the two frames and is connected with the main oil tank and the oil cylinder;

the piston is matched with the oil cylinder, and the movable beam is arranged at the lower end of the piston;

the backing plate is arranged in the working cavity and is abutted against the lower wall of the working cavity.

2. The multi-frame hydraulic machine according to claim 1 wherein there are more than two charge valves in the flat tank, the charge valves being used to control the on/off between the flat tank and the cylinders.

3. The multi-frame hydraulic machine of claim 1 wherein the horizontal cross-section of the flat fuel tank is racetrack shaped.

4. The multi-frame hydraulic machine of claim 1, wherein said main tank is cylindrical, square or spherical supported on the top of said frame.

5. The multi-frame hydraulic machine of claim 1, wherein the frame is a one-piece metal frame or a wire wrap frame.

6. The multi-frame hydraulic machine according to claim 1, wherein the charge valves are symmetrically distributed on both sides of the center of symmetry with the horizontal center of the cylinder as the center of symmetry.

7. The multi-frame hydraulic machine of claim 1 wherein the walking beams are used to mount the cope and the bolster is used to mount the drag.