What are the structural styles and use classifications of hydraulic presses and molding machines?

Hydraulic press (a kind of hydraulic press) is a kind of special hydraulic oil as the working medium, through the hydraulic pump as the power source, by the force of the pump to make the hydraulic oil enter the cylinder piston through the hydraulic pipeline, and then the cylinder piston has several groups of seals that cooperate with each other, the seals in different positions are different, but they all play the role of sealing, so that the hydraulic oil can not leak. Finally, through the check valve, the hydraulic oil is circulated in the oil tank, and the cylinder piston circulates to do work, so as to complete a certain mechanical action as a kind of machinery for productivity.

Hydraulic press structure:

The hydraulic press is composed of two parts: the main engine and the control mechanism. The main engine part of the hydraulic press includes the fuselage, the main cylinder, the ejector cylinder and the liquid filling device. The power mechanism is composed of a fuel tank, a high-pressure pump, a low-pressure control system, an electric motor, and various pressure valves and directional valves.

Under the control of the electrical device, the power mechanism realizes the conversion, regulation and transmission of energy through the pump and cylinder and various hydraulic valves, and completes the cycle of various process actions.

Classification of hydraulic press:

1. Hydraulic presses are classified according to their structural forms.

Now it is mainly divided into: four-column hydraulic press (three-beam four-column type, five-beam four-column type), double-column hydraulic press, single-column hydraulic press (C-shaped structure), frame hydraulic press, etc.

2. Classified according to the use of the hydraulic press.

It is mainly divided into metal forming hydraulic press, bending hydraulic press, drawing hydraulic press, blanking hydraulic press, powder (metal, non-metal) forming hydraulic press, press-fitting hydraulic press, extrusion hydraulic press, extrusion forming, etc.

The hydraulic press is composed of a frame, a protective cover, an electric control box, a mother-child hydraulic cylinder, a two-hand starting box, a photoelectric induction switch, a lower plate of Xintaiming, a guide column, a middle plate, an upper plate, a safety grating, a pure cherry wax grating protection plate, a gas station, and a waste slip material collection port.

Cause analysis and solutions:

2. The oil pump cannot effectively suck in and pump out the oil due to dirty or viscous oil, resulting in low or no pressure oil pressure. The solution: change the oil.

3. The oil is thin or the oil is thinned due to the high temperature of the engine, which will leak from the friction gap of the engine that attacked the Luwang, resulting in low oil pressure. Solution: Change the oil or overhaul the cooling system.

4. Oil leakage of oil pipe, damage to the oil pump or excessive wear of its parts will lead to a reduction in the intake and pumping of oil, or no amount at all, resulting in low or no pressure in the oil pressure. Solution: Overhaul.

5. The gap between the crankshaft and the size of the tile exceeds the standard, resulting in oil leakage, resulting in low oil pressure. Solution: Overhaul.

6. The spring of the pressure limiting valve or pressure relief valve is too soft or the hairpin or steel ball is damaged, resulting in the disappearance or weakening of the valve function, resulting in the reduction of oil pressure and beating force. Solution: Replace and overhaul.

7. The oil pressure is low due to the failure of the oil induction plug, pressure gauge or circuit. Workaround: Replace the check.

Hello, I'm glad to be able to ask you a question, first of all, to tell you about the hydraulic press, because the name is different in different places. It can be called the following three types: hydraulic press, hydraulic press, press.

As for what classification, can I understand why the style!

I'll name them in turn:

Four-column hydraulic press, four-column three-beam hydraulic press, gantry hydraulic press, powder forming hydraulic press, forging hydraulic press, single-arm hydraulic press, shaping hydraulic press, embossing hydraulic press, frame hydraulic press, single-column hydraulic press, C-shaped hydraulic press, multi-cylinder hydraulic press, fast hydraulic press and other classifications.

Hydraulic press is divided into: (multi-functional) three-beam four-column press, two-beam four-column hydraulic press, gantry hydraulic press (aka: frame hydraulic press), single-arm hydraulic press (aka: C-type hydraulic press).

Framed, four-column, single-column.

This is too much, and it is not something that can be explained in a sentence and a half.

Mechanical presses are generally distinguished by the structure type and application characteristics of the fuselage. There are two types: open and closed.

Open press: also known as punch press, it is the most widely used. Open-type presses are mostly vertical (fig. 3).

The fuselage is C-shaped, the front, left and right sides are open, the structure is simple, the operation is convenient, and the fuselage can be tilted at a certain angle, so that the punched workpiece slides down and falls into the hopper, which is easy to realize automation. However, the rigidity of the open fuselage is poor, which affects the accuracy of the workpiece and the life of the mold, and is only suitable for small and medium-sized presses of 40 4000 kN.

Closed-type press: the fuselage is frame-shaped (Fig. 4), the fuselage is open at the front and back, with good rigidity, high precision, and the size of the working table is large, suitable for pressing large parts, and the nominal working force is mostly 1600 60000 kN. Heavy-duty presses such as cold extrusion, hot die forging, and double-action deep drawing all use closed bodies.

There are double-acting drawing presses, multi-station automatic presses, rotary head presses, hot die forging presses and cold extrusion presses.

Double-acting deep-drawing press: it has two slides, inner and outer, which are used for the deep drawing and forming of cup-shaped parts. Before drawing, the outer slider first presses the outer edge of the sheet, and then the inner slider drives the punch to draw the cup to prevent the outer edge of the slab from wrinkling.

After the drawing is completed, the inner slider returns first, and the outer slider is released later. The ratio of the nominal working force of the inner and outer sliders is (:1.

Multi-station automatic press: There are multiple stations on one press, multi-pass forming dies are installed, and the blanks automatically move to the next station in turn. In one stroke of the press, each station carries out each forming process at the same time to make a workpiece.

Rotary head press: between the slider and the workbench, there is a rotary head that can be equipped with dozens of sets of molds, and the molds can be selected according to the needs. The blank is placed on the mold and no longer moves.

At the end of each stroke, the rotating head rotates a position to complete a process. This kind of press has high positioning accuracy, easy to adjust the product, one machine is multi-purpose, mostly used for stamping instrument base plate and panel, etc. The rotary head press can be equipped with a numerical control system, and the mold and plate forming parts are selected according to the programmed instructions, and the complex stamping work is automatically completed.

Hot die forging press: used for the production of die forgings. The fuselage has high rigidity, long guiding surface, and strong ability to withstand eccentric loads.

In the past, the crank linkage mechanism was often used, but in order to improve the rigidity, the double slider type and wedge type have been changed. The double-slider type structure is simple and lightweight; The wedge structure has a large supporting area, but the transmission efficiency is low. When the slider is easy to get stuck near the bottom dead center (commonly known as stuffy car), it is equipped with an ejection device.

There are upper and lower ejection devices in the machine, which can realize multi-die forging, and the forging precision is high, which is suitable for mass production. The maximum specification is 160 trillion N.

Cold extruder: used for cold and warm extrusion of metal parts, such as gun cartridge casings, toothpaste tubes, etc. The cold extruder is generally vertical, which is characterized by good stiffness, high guiding accuracy, high working pressure, small working table and long working stroke.

The hydraulic press directly driven by the hydraulic pump has the following characteristics.

1. The travel speed of the movable beam of the hydraulic press depends on the liquid supply of the pump, and has nothing to do with the deformation resistance of the forging in the process. If the liquid supply volume of the parallel pump is constant, the working speed of the hydraulic press is a fixed value.

2. The liquid supply pressure and the power consumed by the pump are related to the variable wax and shape search resistance of the processed workpiece, and the working deformation resistance is large, and the liquid supply pressure and power consumed by the pump are also large, and vice versa is small.

3. The characteristics of constant stroke speed of the movable beam and the change of the pump supply pressure can be used as the signal to operate the distributor to realize the automatic control of the hydraulic press.

4. The basic investment is low, the area is small, and the daily maintenance and maintenance are simple. The hydraulic pumps in the direct transmission system of the pump are selected according to the maximum working speed and working pressure of the hydraulic press, and the hydraulic pump is not fully utilized when the liquid filling stroke, return stroke, auxiliary process and the required working pressure are small, especially the large-tonnage hydraulic press, and its utilization coefficient is very low. Therefore, the hydraulic press tends to carry out the graded transmission of the working speed and working pressure.

Hydraulic presses are widely used in the trimming, trimming, deburring and shaping processes of various metal die castings such as aluminum alloy, magnesium alloy, zinc alloy, etc., such as the cutting edge and shaping process of die castings such as various auto parts, hardware tools, motor shells, household appliances and other die castings. The fast hydraulic press is based on the process requirements of die castings and hardware trimming, as well as the safety protection of human injury, this equipment is improved and upgraded on the original die casting trimming machine, and the fast hydraulic press contains a safety grating protection function, and the equipment slider anti-fall device, which can effectively protect the operation safety of the operator and reduce the possibility of artificial crushing. The hydraulic press adopts a volt-burning four-column three-beam structure, the middle plate is a Xintaiming movable slider, the guide pillars on both sides are connected to the upper and lower workbenches with 60mm gold-plated chrome rods, and the movable plate is guided by linear bearings and two guide pillars, which can effectively ensure that the perpendicularity and parallel group defect of the activity work shift or the working floor can be reached, so that the parallelism between the movable plate and the lower working floor can be reached, and the advanced hydraulic circuit of the mother and child cylinder is adopted, and the hydraulic series adopts two-way cartridge valve; The electrical control system can be equipped with a "PC" programmable controller, and has an independent electrical and hydraulic power mechanism.

Centralized control of buttons can realize adjustment, manual and semi-automatic operation.

To be practical: the hydraulic press is to use the hydraulic pump to convert the hydraulic energy generated by the hydraulic oil into powerful mechanical energy to complete the work that cannot be completed by hand and is difficult to complete.

Common hydraulic presses in life: hydraulic presses, hydraulic balers, hydraulic straighteners, hydraulic shearing machines, die-casting machines, profile extruders (this belongs to the largest and most cumbersome hydraulic system in the non-ferrous metal industry, and I designed this.) Employers:

Wuxi Yuanchang Machinery Manufacturing ****, you can go to my company ** to see, thank you. )