Hydraulic press is often used in production and processing, such as cutting, punching, blanking, bending, riveting and forming. The hydraulic press makes the metal plastic deformation and fracture by exerting strong pressure on the metal blank. Under the pressure, some things that are not easy to form are formed, so as to process various parts. However, the purchase of hydraulic press is a subject, and even users who can operate and use hydraulic press have a fog about how to purchase a more suitable hydraulic press. At present, there are many manufacturers of hydraulic presses on the market. Many people may choose to buy for the sake of temporary interests and low prices, which will not save money in the long run. To be honest, there is no cheap good product, and on the contrary, there is no good quality assurance for cheap products. On the whole, there is the best combination point between product price and quality, which is commonly referred to as "cost-effective". For machines like hydraulic presses, expensive ones are not necessarily the best, but the best ones are not too cheap. We recommend that customers consult more, investigate more and pay more attention to details. On the basis of comprehensive consideration of various factors such as machine tool stability and after-sales service, the purchase should be evaluated in various aspects.

1. The type of hydraulic press is various, with different rigidity, precision and purpose. It should be selected reasonably according to the nature of production process, batch, mold conditions, precision requirements, etc. Generally, the crank hydraulic press with convenient operation and high production efficiency can be selected for large production batch and mostly small and medium-sized parts; If it is to produce such deep drawing parts as washing bucket, it is better to use the hydraulic press for drawing.

2. According to your actual needs, the following principles should be followed when determining the purchase specifications:

① The user should know what the enterprise processes, and whether there are special requirements for the hydraulic press? At the same time, there is a certain margin to consider the demand after expanding the scale of the enterprise.

② The nominal pressure of the hydraulic press must be greater than the stamping process force. However, for processes with long working stroke, it is not only necessary to meet the size of process force, but also to consider meeting the workload curve.

③ The number of strokes of hydraulic press shall meet the requirements of productivity.

④ The stroke of the slider of the hydraulic press shall meet the requirement that the parts can obtain the required size in height and can be taken out of the die smoothly after the stamping process is completed. For tensile parts, the stroke shall be more than twice the height of the part. The closing height of the hydraulic press, the size of the worktable, the size of the slide block, and the size of the mold handle hole must meet the requirements for the correct installation of the mold. For the crank press, the closing height of the mold should be between the maximum mold mounting height and the minimum mold mounting height of the press. The size of the worktable shall generally be 50-70mm (single side) larger than the lower mold base of the mold for ease of installation. The hole diameter of the base plate shall be larger than the projected size of the workpiece or waste, so that the size of the leaking mold handle shall be consistent with the size of the mold handle hole.

3. Select manufacturer

As the saying goes, if you want to do a good job, you must first sharpen your tools. The quality of the hydraulic press directly affects the production efficiency. As a buyer, I definitely hope to buy the best hydraulic press at the lowest price. After contacting several manufacturers and obtaining information such as price, parameters and delivery method, the most important thing is to choose to purchase. After sales of machine tools are generally provided by the manufacturer. Direct purchase from the manufacturer can not only save money, but also ensure that after-sales care is free. Therefore, we must pay attention to whether the other party is a real manufacturer and whether they can provide timely and thoughtful after-sales service. If conditions permit, it is better to go to the manufacturer to see the production scale and actual processing capacity. Check whether the appearance design of the hydraulic press is reasonable and whether the painting is uniform and smooth. It is better that the appearance is smooth and free of pitting.

Start up the machine and test it to see if there is any abnormal noise or mechanical shaking. During the test run, all functions of the hydraulic press shall be tested to see how the pressure effect is and whether the operation is flexible.

Get to know the people who work on machines. Installation and debugging is a very technical work, which requires certain skills and relevant professional knowledge. It is necessary to make the hydraulic press in good condition for correct debugging. In addition, the faster the rotation speed of hydraulic press is, the higher the production efficiency is; The weight can reflect whether the hydraulic press is durable to a certain extent; Low power consumption, low oil temperature and long service life. The sealing property of hydraulic pressure directly affects the use and service life. A good hydraulic press will not leak oil. In addition, scientific materials are also the key to prolong the service life of hydraulic press. It can be seen that we should be careful not only when selecting hydraulic presses, but also when using them.

matters needing attention

When purchasing a hydraulic press, you should first look at the frame. If the frame structure is unreasonable, many problems will occur. Then look at the hydraulic system to see what accessories are used and whether the configuration is reasonable.

We should pay attention to selecting the right things, such as speed, strength, installation space, safety factor, quality certificate, three guarantee contract, etc. It also depends on whether the design of the hydraulic press is reasonable, whether there is a pressure gauge, whether there is a pressure gauge switch, whether there is an overflow valve, motor and oil pump, etc. It is recommended to purchase large hydraulic presses from manufacturers with guaranteed quality and after-sales service.