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How much do you know about electric spindles?
I. Structural compositionThe electric spindle is a new technology that combines the machine tool spindle and the spindle motor in the field of CNC machine tools in recent years. The main drive system of high-speed CNC machine tools eliminates the belt drive and gear drive. The main shaft of the machine tool is directly driven by the built-in m... I. Structural compositionThe electric spindle is a new technology that combines the machine tool spindle and the spindle motor in the field of CNC machine tools in recent years. The main drive system of high-speed CNC machine tools eliminates the belt drive and gear drive. The main shaft of the machine tool is directly driven by the built-in motor, which shortens the length of the main drive chain of the machine tool to zero and realizes the "zero drive" of the machine tool. This type of transmission structure intergrating spindle motor and machine tool spindle, which makes the spindle components relatively independent from the drive system and overall structure of machine tool, so it can be made into a "spindle unit", commonly known as electric spindle or Motor Spindle.The electric spindle is a set of components, which includes the electric spindle itself and its accessories: electric spindle, frequency conversion device, oil mist lubricator, cooling device, built-in encoder, tool changer, etc. The rotor of the motor is directly used as the main shaft of the machine tool, and the housing of the main shaft unit is the motor base, and other parts are integrated to realize the integration of the motor and the main shaft of the machine tool.II.Driving methodThe electric motor of the electric spindle adopts AC asynchronous induction motor. It is used on high-speed processing machine tools, so it needs to rise rapidly from static to tens of thousands of revolutions per minute or even hundreds of thousands of revolutions at startup. The starting torque is large, so the starting current must exceed the rated current of the ordinary motor by 5 to 7 times.. There are two types of drive methods: inverter drive and vector control drive. III. Application of high-speed electric spindle in machine tool industry1. Simplify structure and promote modular machine tool structureThe electric spindle can form standardized and serialized products according to the characteristics of use, structure, and performance parameters for the host to choose, thereby promoting the modularization of the machine tool structure.2. Reduce machine tool costs and shorten machine tool development cycles. Standardized and serialized electric spindle products are easy to form professional and large-scale production, and can shorten the development cycle of machine tools, adapting to the current fast-changing market trend.3. Improve machine performance and reliability.The CNC machine tool adopting the electric spindle structure has improved the reliability of the machine tool due to the simplified structure and the reduction of transmission and connection links; the electric spindle components with the mature technology, complete functions, excellent performance and reliable quality make the machine tool more reliable.4. Realize the special requirements of some high-end CNC machine tools.Some high-end CNC machine tools, such as parallel kinematic machine tools, pentahedron machining centers, small hole and ultra-small hole processing machine tools, must use electric spindles in order to meet the complete functional requirements. The electric spindle system is directly driven by the built-in motor to meet the high-speed cutting’s requirements of “high speed, high precision, high reliability and small vibration” on the machine tool. The combination of electric spindle technology and motor frequency conversion, closed-loop vector control, and AC servo control technology can meet the needs of metal cutting processing such as turning, milling, boring, drilling, and grinding.In September 1958, the spindle manufacturing department successfully developed China's first high precision electric spindle. The electric spindle uses the speed of 30,000 ~ 60,000r / min for precision bearing grinding.Through the efforts of several generations of spindle employees, ZYS has established its leading position in the field of high frequency Spindle spindle in China, and its research and development strength and spindles varieties rank first in China.For more detailes of electrical spindle, please contact Mr. ZHANG by zys_zyj@163.com.zys electrical spindleZYS bearing testing machines are suitable for bearing life tests and all kinds of simulation tests. The bearing testers can realize automatic loading and centralized View Details
Introduction of Bearing Ring Groove Superfinishing Machine
Bearing Ring Groove Superfinishing Machine is semi-automatic superfinishing machine for groove of ball bearing ring, which is suitable for processing inner and outer ring groove.Processing accuracy is above P5 level. The workpiece spindle of the machine is driven by an AC- motor through belt pulley, and the variable frequency stepless speed is reg... Bearing Ring Groove Superfinishing Machine is semi-automatic superfinishing machine for groove of ball bearing ring, which is suitable for processing inner and outer ring groove.Processing accuracy is above P5 level. The workpiece spindle of the machine is driven by an AC- motor through belt pulley, and the variable frequency stepless speed is regulated. The oscillating mechanism is connected by a bending plate to the side of the drag plate. The feeding drag plate is installed on the top of the workpiece spindle box. The  press device is fixed on the left side of the workpiece spindle box by bending plate.The radial and axial movement of the machine's dragging plate, the radial reciprocating and end face pressing of the pressure device, the oilstone pressure are all controlled by the hydraulic system, and the order of superfining action and the frequency of oscillation are controlled by electrical system. In order to achieve higher machining accuracy, various parameters are adjusted according to the size of the workpiece, the rough and fine superfining are finished.L ubrication of the machine Before running the machine, lubricate the relative motion guide and the parts with oil mark. Bearings lubricated with molybdenum disulfide shall be replaced semiannually. 12.Maintenance of the machine 1) The guide of the machine should be regularly lubricated, and there should be no acid and other sundries mixed in the lubricating oil. 2) Regularly check the insulation of electrical appliances of machine. 3) When the machine fails, press the total stop button immediately to stop all moving parts. 4) The pressure gauge and electromagnetic valve of each oil system shall be checked regularly to ensure the reliability of their work. 5) The coolant of the oil tank should be replaced regularly and the sediment should be removed. 6) The filter should be cleaned regularly to ensure the filtering effect. View Details
Technical requirements of manufacturing slewing bearing
1. Confirms with the technical requirements of the implementation of JB / T 10839-2008 slewing ring standard; 2. Material quenching HB207-262; 3. Raceway quenching HRC55-62, hardened layer depth 3-4mm, no cracks; 4. The installation hole did not note chamfered ends are 1.0 * 45 °; 5. Gear accuracy 10GK GB10095-88, the amount of gear be... 1. Confirms with the technical requirements of the implementation of JB / T 10839-2008 slewing ring standard; 2. Material quenching HB207-262; 3. Raceway quenching HRC55-62, hardened layer depth 3-4mm, no cracks; 4. The installation hole did not note chamfered ends are 1.0 * 45 °; 5. Gear accuracy 10GK GB10095-88, the amount of gear beating 0-0.45mm; (teeth quenching required otherwise) 6. The implementation of raceway structure ∅ 39.688G60 ball size; 7. Axial, radial clearance 0.08-0.25mm. View Details
The working principle of deep groove ball bearings
Deep groove ball bearings are suitable for high speed operation, low vibration and low noise, and they are extremely durable and require no maintenance. Deep groove ball bearings have the features of small friction coefficient, high limit speed, various sizes and forms, and they can be used in precision instruments, low noise motors, automobiles, m... Deep groove ball bearings are suitable for high speed operation, low vibration and low noise, and they are extremely durable and require no maintenance. Deep groove ball bearings have the features of small friction coefficient, high limit speed, various sizes and forms, and they can be used in precision instruments, low noise motors, automobiles, motorcycles and general machinery. It is the most widely used type of bearing in the machinery industry. They mainly bear the radial load and can also withstand a certain amount of axial load. When it increases the radial clearance of the bearing, it has certain angular contact bearing performance and can withstand radial load and axial combined load. The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of cages. There are two types of deep groove ball bearings: single row and double row. The deep groove ball structure is divided into two types: sealed and open. The open type means that the bearing does not have a sealing structure. The sealed deep groove ball is divided into dustproof seal and oil proof seal. The dust seal cover material is stamped from steel plate, which is simple to prevent dust from entering the bearing raceway. The oil-proof type is a contact type oil seal, which can effectively prevent the grease inside the bearing from overflowing. The type code of deep groove ball bearing is 6, and the double row deep groove ball bearing code is 4. It is the most common and widely used class 0 bearing. View Details
Selection of Bearing Sizes
                                       It is really important when choosing the bearing type. Wrong choice of bearing sizes will cause bearing damage and failure. ZYS can help you choose the suitable type. When selecting the type, it is necessary to ...                                        It is really important when choosing the bearing type. Wrong choice of bearing sizes will cause bearing damage and failure. ZYS can help you choose the suitable type. When selecting the type, it is necessary to take the following factors into account: Amount and type of the load Design of seating and way of lubrication of the bearing Operational parameters of the bearing (speed, thermal conditions, etc.) Requirements for accuracy Requirements for installation and dismantling View Details
Method for positioning and fixing inner and outer rings of rolling bearings
                                       Method a. The retaining ring is embedded in the groove of the shaft, and is mainly used when the axial force is not large and the rotating speed is not high; image Method b. Tightened with screw and retain...                                        Method a. The retaining ring is embedded in the groove of the shaft, and is mainly used when the axial force is not large and the rotating speed is not high; image Method b. Tightened with screw and retaining ring, it can be used to withstand large axial forces at high speeds, and the screws should be secured against loosening; image Method c. Fastened with round nut and retaining washer, it is mainly used for high speed and large axial force; image Method d. Fastened with a tapered sleeve, a retaining washer and a round nut, it is used for bearings on the optical axis with a tapered bore as the inner ring; image Method e. Fastened with the retaining ring inserted into the groove of the outer casing, it is mainly for the small axial force and small bearing device; image Method f. Fastened with bearing end caps, it is used for all kinds of centripetal, thrust and radial thrust bearings with high speed and large axial force; image Method g. Fastened with the retaining ring inserted into in the retaining groove of the outer ring of the bearing, and is used when the outer casing is inconveniently provided with a shoulder; image Method h. Fastened with threaded ring, it is used for bearing with high speed and large axial force, but it is not suitable for fastening with bearing end caps. image View Details