Changzhou Beidefu Pneumatic Tools Co., Ltd. specializes in the design and production of power chucks and rotary oil (gas) cylinders. The company has an experienced design team and a production team with strong manufacturing capabilities. It can provide users with high-quality services, and can also design and produce various special fixtures according to different user needs, and install hydraulic chuck systems on various machine tools. The company has rich manufacturing experience especially in vertical lathe hydraulic chucks, front-mounted pneumatic pipe thread chucks, double-action chucks and rotary cylinders. The company will, as always, adhere to the business philosophy of 'technological innovation, manufacturing high-quality products', fully implement quality management, strictly control product quality, continuously improve the service system and product series, and continue to strive to remain a more professional and influential clamp manufacturer and service provider in the country. The company has always pursued the business policy of 'customer first', adhered to the management philosophy of 'quality first', and served customers wholeheartedly. The company looks forward to continuing to receive support and cooperation from our customers. Very feeling Read More »

What is the difference between hollow hydraulic and medium solid hydraulic chucks? Which one is better? Anyone who does machining knows that there are many types of chucks. In terms of power, there are hydraulic, pneumatic, and manual chucks. In terms of structural characteristics, they can be divided into hollow chucks and medium-solid chucks. What's the difference between them? Which one is better? The difference between hollow and medium-solid hydraulic chucks can be distinguished from its usage characteristics: ① Hollow, in other words, the middle is hollow, and the clamped workpiece can be cut through the chuck. It is generally suitable for the mass production of some bar materials. It needs to work with a tie rod with a through-hole design. In addition, the current hollow chucks come with a dust cover. As the name suggests, with this dust cover, it can not only be used as a solid chuck, but also dustproof, waterproof, and iron filings. It is very practical. ② Medium solid, in other words, the middle is solid. The clamped workpiece cannot pass through the chuck. It needs to be worked with a solid tie rod, which is generally suitable for clamping. Read More »

　As people demand higher and higher work efficiency, hydraulic chucks gradually replace manual chucks and have been widely used. In order to meet the processing requirements of different workpieces, such as rectangular surfaces, cylindrical blank surfaces and other irregular-shaped workpieces, as well as some workpieces with eccentricity between the clamping surface and the processing surface, a four-jaw hydraulic chuck is usually required. The chuck is a mechanical device used to clamp workpieces on machine tools. It uses the radial movement of three movable jaws evenly distributed on the chuck body to clamp and position the workpieces. The chuck generally consists of three parts: the chuck body, the movable jaw and the jaw driving mechanism. According to the number of chuck jaws, it can be divided into: two-jaw chuck, three-jaw chuck, four-jaw chuck, six-jaw chuck and special chuck. In terms of power, it can be divided into: manual chuck, pneumatic chuck, hydraulic chuck, electric chuck and mechanical chuck. Structurally, it can be divided into: hollow chuck and medium solid chuck. This article mainly introduces the four-claw customization in the four-claw chuck. Read More »

The research on the hydraulic chuck clamping control system of CNC lathes mainly studies the clamping control system of CNC lathe hydraulic chucks. The relationship model between the clamping force and rotation speed of the power chuck was established. The clamping force compensation based on the change of oil supply pressure with speed was analyzed. The oil circuit of the clamping control system of the power chuck was designed. Through experiments, it was verified that the chuck control system using hydraulic pressure compensation has better high-speed performance. Modern processing technology is developing towards high efficiency and high precision, which places high speed and high precision requirements on CNC machine tools and their fixtures. The power chuck is the most commonly used workpiece fixture in CNC lathes. It is the bridge connecting the lathe spindle and the workpiece. The movement and accuracy of the lathe spindle are transmitted to the workpiece through the chuck. The hydraulic power chuck, which perfectly combines hydraulic transmission technology and self-centering chuck technology, has become an indispensable basic functional component of current CNC lathes. At present, the maximum speed of the electric spindle of domestic CNC lathes can Read More »

CNC lathe chuck is an important device for clamping workpieces. It is mainly installed on the lathe spindle. The rotation of the spindle drives the rotation of the chuck to achieve cutting. So do you know which lathe chucks are more commonly used? Structurally, it can be divided into: two-claw chuck, three-claw chuck, four-claw chuck, six-claw chuck, eight-claw chuck, etc. So when should these types of chucks be used? Two-jaw chuck: Used in finishing turning, grinding and indexing head milling, generally with higher accuracy requirements; if accuracy requirements are required for rough machining and invisible positions, a lower-precision two-jaw chuck can be used, and the centering accuracy is not very high. Three-claw: The three claws of the three-claw chuck can move synchronously to realize the automatic centering function. It has a large clamping range and fast clamping, and can realize mass production and processing. Some bar workpieces mostly use this type of chuck, and it is also the most common fixture currently used. Four claws: can be divided into two types: linkage type and single-action type, generally clamping some Read More »

　1. Three-claw chuck: The three-claw chuck is the most commonly used universal lathe clamp. The biggest advantage of the three-claw chuck is that it can automatically center, has a large clamping range, and has fast clamping speed. However, there are errors in the centering accuracy and it is not suitable for secondary clamping of workpieces with high coaxiality requirements. 2. Hydraulic power chuck: It has sensitive action, fast and convenient clamping, can achieve large pressing force, can improve productivity and reduce labor intensity. However, the clamping range changes slightly, and the claw position needs to be readjusted when the size changes greatly. CNC lathes with a high degree of automation often use hydraulic self-centering chucks, which are especially suitable for batch processing. 3. Adjustable jaw chuck: It takes more time to clamp and align parts than other types of chucks. Therefore, this chuck is rarely used on CNC lathes, which are crucial to improving productivity. Adjustable jaw four-jaw chuck is generally used to position and clamp parts with non-concentric or structurally symmetrical surfaces. Use four-claw chuck, face plate, corner Read More »

'Introduction to Commonly Used Clamps for CNC Lathes' 1. Introduction to Commonly Used Clamps for CNC Lathes Lathe clamps mainly refer to the clamps installed on the lathe spindle. This type of clamp is connected to the machine tool spindle and drives the workpiece to rotate with the spindle. Lathe clamps are mainly divided into two categories: various chucks, which are suitable for processing disc parts and short-axis parts; clamps with center holes and top centering positioning and mounting workpieces, which are suitable for shaft parts with larger lengths or more processing procedures. CNC turning processing requires that the fixture should have high positioning accuracy and rigidity, simple structure, strong versatility, easy installation of the fixture on the machine tool, rapid loading and unloading of workpieces, automation and other features. 1. Various chuck fixtures In most CNC lathe processing, the outer circle of the workpiece or blank is used for positioning. The following fixtures are circumferential positioning fixtures. The three-claw chuck is the most commonly used universal fixture for lathes. The biggest advantage of the three-claw chuck is that it can automatically center and clamp.　　 Read More »

　The hydraulic system of the CNC machine tool uses a pressure-limiting variable vane pump to supply oil. The working pressure is adjusted to 4MPa, and the pressure is displayed by a pressure gauge. The pressure oil output by the pump enters the branches of each subsystem through the one-way valve. Its working principle is as follows: 1. Clamping and releasing of chuck. When the chuck is required to be in positive clamping (the claws clamp the outer circumference of the workpiece inward) and under high pressure and large clamping force, 3YA loses power, the valve works in the left position, and the pressure reducing valve is selected to work. The clamping force is adjusted by the pressure reducing valve, and the clamping pressure is displayed by the pressure gauge. When 1YA is powered on, the valve works in the left position, and the flow direction of the system pressure oil is: oil pump → one-way valve → pressure reducing valve → left position of the reversing valve → left position of the reversing valve → right chamber of the hydraulic cylinder. The oil in the left chamber of the hydraulic cylinder returns directly to the tank through the left position of the valve. At this time, the piston rod moves to the left and the operating chuck is clamped. When 2YA is powered on, the valve works in the right position, the system pressure oil enters the left chamber of the hydraulic cylinder, and the oil in the right chamber of the hydraulic cylinder returns directly through the valve. Read More »

　Once the limit speed of the machine tool spindle is exceeded, some small problems that originally existed in the machine tool sometimes become extremely serious problems. When using a vertical lathe for metal cutting, the spindle speed has a significant impact on the processing process. In the low speed or common speed range of the spindle, it has little impact on its processing quality. Between cutting speed and processing quality, the selection of various cutting parameters will follow the rules revealed by cutting theory. Processing beyond the limit value or at a higher spindle speed will cause an increase in cutting temperature, greater centrifugal force on the workpiece, and may also cause vibration of the machine tool. The higher the spindle speed, the greater the force (centrifugal force) generated from the rotating shaft that pulls the parts outward. Especially in finishing, the centrifugal force has a greater impact on the spindle bearings. When using the CNC vertical lathe in daily use, you must not connect the transmission box of the CNC vertical lathe and the sealing place of the valve shaft so that there is leakage. If the CNC vertical lathe has leakage, Read More »

　Hello everyone, I am your good friend, Bedefu Machinery Technology (Changzhou) Co., Ltd. Today, let’s talk to you about the back-pull vertical (pneumatic) hydraulic chuck. It has the following characteristics: 1. When drilling and milling on the workbench, the workpiece is held firmly and will not float, and is suitable for heavy cutting and processing of castings or forgings; 2. Anti-rust treatment of the cylinder. In humid and poor working environments, the inside of the cylinder is anti-rust and will not rust or get stuck; 3. Dust-proof device, when drilling and milling on the workbench, cutting and coolant will not easily enter the interior of the chuck, ensuring the service life and accuracy of the chuck; 4. Gravity clamping design, combined with a hydraulic system to gravity clamp the workpiece, the structural design is stable and will not deform. Read More »

　1. The operator must pass the examination and obtain the operation certificate before operating. The operator should be familiar with the performance and structure of the machine, and must abide by the safety and shift handover system. 2. Before work, oil should be filled in strictly in accordance with the lubrication regulations, and the amount of oil should be kept appropriate, the oil circuit is smooth, the oil mark (window) is eye-catching, and the oil cup, oil line, linoleum, etc. are clean. 3. Check whether all parts are in good condition and run dry for about 10 minutes. Confirm that all parts are operating normally before starting work. If any abnormal operation, abnormal noise or excessive temperature rise is found during work, stop the machine and eliminate it. 4. The tool should be installed correctly and reliably. The extended part should not be too long. The gaskets should be straight and the same size. Generally, there should be no more than two pieces. It is prohibited to use pure tools for cutting. 5. Cutting of various systems, valves, cylinder pipelines, etc. of the hydraulic system must be confirmed after inspection and test run. 6. No tools, fixtures or sundries should be placed on the lathe. Work fixtures should be placed in tool boxes or tool boxes. Read More »

　Front-mounted pneumatic chuck, the chuck has a built-in hydraulic/pneumatic rotary cylinder, eliminating the need for additional installation of the rotary cylinder. The chuck is easy to install and quickly establishes a work clamping system. The pneumatic chuck cylinder is enlarged to improve the clamping force. New functions: JH7-70/JH9-90/JH9-120 can be driven by pneumatic pressure (optional booster cylinder) collet/auxiliary jaw quick replacement design, high working elasticity chuck with center through hole design, with automatic feeding system, the work chuck can be loaded and unloaded without stopping, high productivity, suitable for traditional lathe modification automation or semi-automation, suitable for assembling various special processing machines. The cutting fluid cannot be directed towards the chuck. What are the characteristics of a front-mounted pneumatic chuck? The chuck has a built-in hydraulic/pneumatic rotating cylinder. The rotating cylinder card can be easily installed without additional installation. Quickly build a work clamping system. Pneumatic clamping cylinder to improve clamping force. New features: pneumatic drive (pressurized cylinder option) barrel clamp/claw, high working elastic chuck with center through hole design. Read More »