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slewing bearing
The slewing bearing is a large bearing that can withstand comprehensive loads, and can simultaneously withstand large axial and radial loads and overturning moments. Slewing ring bearings are generally equipped with mounting holes, internal gears or external gears, lubricating oil holes and sealing devices, which can make the host design compact, e... The slewing bearing is a large bearing that can withstand comprehensive loads, and can simultaneously withstand large axial and radial loads and overturning moments. Slewing ring bearings are generally equipped with mounting holes, internal gears or external gears, lubricating oil holes and sealing devices, which can make the host design compact, easy to guide, and easy to maintain. Slewing ring bearings have four-point contact ball bearings without gears, external gears and internal gears, double-row angular contact ball bearings, crossed cylindrical roller bearings, crossed tapered roller bearings and three-row cylindrical roller composite bearings. Series, four-point contact ball bearings have higher static load capacity, crossed cylindrical rollers have higher dynamic load capacity, and the pre-interference of crossed tapered roller bearings enable the bearings to have greater support rigidity and rotation accuracy. The three-row cylindrical roller combined bearing leads to the height of the bearing due to the increase in load capacity, and various forces are borne by different raceways, so under the same force, the bearing diameter can be greatly reduced, so it has the characteristics of making the host more compact. A slewing bearing with high load capacity. Slewing bearings are widely used in large-scale slewing devices of cranes, mining machinery, construction machinery, port machinery, marine machinery, and high-precision radar machinery and missile launchers. At the same time, it can also design, develop and produce various special structure slewing bearings according to the specific requirements of users.http://www.zysbearing.com/slewing-bearings/ View Details
Ball screw bearing
Ball screw bearings have the characteristics of high precision, reversibility and high efficiency. This is a further extension and development of the trapezoidal screw. The important significance of this development is to turn the sliding action of the trapezoidal screw into a rolling action. Because of its low frictional resistance, ball screw bea... Ball screw bearings have the characteristics of high precision, reversibility and high efficiency. This is a further extension and development of the trapezoidal screw. The important significance of this development is to turn the sliding action of the trapezoidal screw into a rolling action. Because of its low frictional resistance, ball screw bearings are widely used in various industrial equipment and precision instruments.In order to adapt to various purposes, ball screw bearings provide a wide range of standardized products. The circulation methods of the balls include circulating duct type, circulator type and end cap type. Preloading methods include positioning preloading (double nut method, position preloading method) and constant pressure preloading. The appropriate type can be selected according to the purpose. The screw has high-precision grinding precision ball screw (precision is divided into 7 grades from CO-C10) and cold-rolled ball screw bearing formed by high-precision cold rolling (precision is divided into 3 from C-C10) A level, only a few can do it). In addition, in order to cope with the urgent need for delivery by users, there are finished products that have been processed on the end of the shaft, semi-finished products and cold rolled ball screw bearings that can be freely processed on the end of the shaft. As peripheral parts of this bearing, the screw support unit, nut holder, lock nut, etc. necessary for use have also been standardized.Ball screw bearings are based on product technology accumulated over the years, from materials, thermal management, manufacturing, inspection to shipment, are managed by a strict quality assurance system, so they have high reliability.http://www.zysbearing.com/precision-bearings/ball-screw-support-bearings.html View Details
cold rolling machine
The cold rolling mill is a new type of steel bar cold rolling processing equipment. The machine can process hot-rolled wire rods and hot-rolled coils with a diameter between 6.5 mm and 12 mm into cold-rolled ribbed steel bars with a diameter of 5 mm to 12 mm. The cold-rolled ribbed steel bar rolled by the cold rolling mill is an updated product of ... The cold rolling mill is a new type of steel bar cold rolling processing equipment. The machine can process hot-rolled wire rods and hot-rolled coils with a diameter between 6.5 mm and 12 mm into cold-rolled ribbed steel bars with a diameter of 5 mm to 12 mm. The cold-rolled ribbed steel bar rolled by the cold rolling mill is an updated product of cold-drawn low-carbon steel wire in the prestressed concrete structure. In the cast-in-place concrete structure, it can be replaced with the grade I steel bar to save steel. It is a better kind of cold processed steel of the same kind. If speed adjustment is not required during the rolling process of the cold rolling mill, an AC motor can be used; if speed adjustment is required during the rolling process of the cold rolling mill, a DC motor can be used.The cold rolling mill uses a motor to drag the steel bars, and the load-bearing rolls and work rolls of the cold rolling mill are used to jointly apply force to the two surfaces of the steel bars. The purpose of rolling cold-rolled ribbed steel bars with different diameters is achieved by changing the size of the gap between the two rolls.① Load-bearing roller: The load-bearing roller of the cold rolling mill is the roller closest to the stand. This roller serves to hold the steel bar when producing ribbed steel bars, and equalizes the gravity of the steel bar and the work roll. Scattered on the load-bearing roller, so that the lower surface of the steel bar produces ribs.②Work roll: The work roll of the cold rolling mill is on top of the load-bearing roll and is the farthest away from the stand, so the roll mainly plays a role in rolling the steel bar lifted by the load-bearing roll when producing ribbed steel bars. , So that the upper surface of the steel bar has ribs.http://www.zysbearing.com/bearing-manufacturing-machines/precision-cold-rolling-machine.html View Details
An elevator in a community frequently makes strange noises
The sound of an elevator has been particularly loud recently, and it sounds like something is wrong with the machine. Standing in the elevator makes people feel uneasy. Yesterday, it was found that the elevator on the right side issued a "click" every time it went up and down. The loud noise makes people feel terrified.The person responsible for el... The sound of an elevator has been particularly loud recently, and it sounds like something is wrong with the machine. Standing in the elevator makes people feel uneasy. Yesterday, it was found that the elevator on the right side issued a "click" every time it went up and down. The loud noise makes people feel terrified.The person responsible for elevator maintenance introduced that the loud noise from the elevator was mainly due to the water in the elevator bottom tank, which caused the Elevator bearing to get wet, the butter dried out and rusted, and the bearing balls fell off. Prior to this, they had transferred accessories to the elevator production headquarters and had been repaired. However, at present, there are still cases where the doors are easily stuck.After learning the situation, the staff also went to the scene to check. After discovering that the elevator doors are still easily stuck, the staff immediately asked the maintenance company to suspend the use of the elevator. After the maintenance is completed, it must be inspected by the special inspection institute before it can be put into use. At the same time, the staff also required the use of excellent safety Elevator bearing to eliminate safety hazards. View Details
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