History of hydraulic press

27 Oct 2021

As early as 1662, Pascal discovered the possibility of using liquids to generate great power. In 1795, the British Bramah obtained the patent for the first manual hydraulic press, but the development history of the real hydraulic press was less than 200 years. With the development of Western capitalism, the invention of the steam engine triggered a revolution in industrial production, and modern large-scale industry gradually replaced the handicraft industry. The forging process with a long history has gradually changed from manual forging to machine forging. At the beginning of the 16th century, the first hydraulic mechanical hammers appeared. In 1839, the first steam hammer appeared. Since then, with the rapid development of the machinery manufacturing industry, the size of forgings has become larger and larger, and the weight of the forging hammer has exceeded 100t. Such a heavy forging hammer is difficult to operate and has huge vibration, which brings many problems. From 1859 to 1...

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Hydraulic oil tank design of hydraulic press

21 Oct 2021

1. Tank top, breather, oil injection port The top structure of the fuel tank depends on the components installed on it. When the pump set is installed on the top of the box, the thickness of the top plate is four times that of the side plate to avoid vibration. Ventilators and oil injection ports are generally provided on the top of the box, and the air vents are often structured with oil injection ports. Remove the breather cap to fill it with oil, and put it back into the breather cap to complete the breather filter. The mesh of the ventilation filter should be less than 250, the flow rate should be greater than 20L/min, the filtration accuracy should not be less than 40, and its capacity should be twice the capacity of the hydraulic pump. The threaded holes on the top of the fuel tank should be blind holes (non-through holes) to prevent pollutants from falling into the fuel tank. The connection details of the tank top and the tank wall are shown in Reference [6], Figure 7-67. 2. Box...

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Overview of hydraulic press

19 Oct 2021

The hydraulic press is a machine that uses liquid as the working medium and is made according to Pascal's principle to transfer energy to realize various processes. Hydraulic presses are generally composed of the machine (host), power system and hydraulic control system. Hydraulic presses (also known as hydraulic presses) are made by Pascal's law and are driven by hydraulic pressure. There are many types of hydraulic presses. Of course, the use is also diverse according to needs. For example, according to the type of liquid that transmits pressure, there are two categories: hydraulic press and hydraulic press. The total pressure generated by the hydraulic press is relatively large, and it is often used for forging and stamping. Forging hydraulic press is divided into die forging hydraulic press and free forging hydraulic press. The die forging hydraulic press uses molds, while the free forging hydraulic press does not use molds. The first 10,000-ton hydraulic press manufactured in Chin...

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Automatic oil replenishment and pressure maintaining circuit of hydraulic press

14 Oct 2021

The function of the pressure holding circuit is to enable the system to maintain a stable and constant pressure when the hydraulic cylinder is not moving or when the workpiece is deformed to produce a small displacement. According to the working requirements of the bending machine, the pressure holding time needs to be about 5s, and the pressure stability is good. Then you can choose a hydraulically controlled check valve to maintain the pressure loop, The M-type three-position four-way reversing valve is selected, and the function of the middle position slide valve is used to close the two-cylinder hydraulic cylinder, and the system is no longer unloaded. An automatic oil replenishment circuit is designed, and the pressure holding time can be controlled by the electrical component time relay. This circuit is fully qualified for high pressure systems with relatively high pressure holding performance, such as hydraulic presses. The working principle of the system diagram of the automati...

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How to select the straight single-seat quick-opening valve

08 Oct 2021

Caliber calculations are generally not required for straight-through single-seat quick-opening valves, but when it is close to the equipment behind the valve, in order to prevent the high-pressure medium from impacting the equipment when the valve is quickly opened, the caliber calculations must be performed on the straight-through single-seat quick-opening valves. Methods as below: Before choosing a straight-through single-seat quick-opening valve, you must understand the detailed process parameters and control requirements, and make a preliminary judgment based on the process parameters and control requirements whether you can use a straight-through single-seat quick-opening valve. If you can choose a straight-through single-seat quick-opening valve, then Perform detailed calculations of flow coefficient, noise and unbalanced force according to the process parameters, and finally select the detailed configuration of the valve according to the calculation results. The calculation and ...

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Welcome customers and friends to call or write to us for consultation

27 Sep 2021

Dongguan Chenghong Machinery Automation Technology Co., Ltd. has been actively engaged in production and sales for a long time: packaging machinery and equipment; production and processing: plastic and paper outer packaging. The company is located at No. 20, Ma'an Road, Chashan Town, Dongguan City, Guangdong Province, with convenient transportation. Dongguan Chenghong Machinery Automation Technology Co., Ltd. has a registered capital of 60,000 yuan. Based on the principle of "customer first, integrity first, people-oriented", domestic and foreign enterprises/companies/institutions are welcome to establish long-term cooperative relations with this unit. Sincerely welcome friends from all walks of life to visit, inspect and negotiate business. Since its establishment, the company has continuously absorbed and borrowed advanced business and management concepts at home and abroad, and strived to achieve self-transcendence in the company's business and management! The past year was a wonder...

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