Merchandise Description
Item description
Ball screw assembly is consisted of ball screw nut and rod. The purpose is transfer the rotary motion into linear motion or transfer the linear movement into rotary movement.Ball screw is extensively utilised for all varieties of industrial equipments and precision instrument.Because 1964, the business produced the China's initial ball screw, it has on the leading position in China in the investigation and manufacture of ball screw.
Specifications
Ball sort:ø8 - ø200High transmission rate
Transmission reversibility
long service life,great synchronicity
Max ability is 376 tons.
Max. solitary to 10m,joint to 19m
It is widely employed in all varieties of industrial equipments,precision NC machine tool
FAQ
Why pick AZI China?
With a lot more than 60 a long time of production encounter, top quality assurance,factory directly price tag.
How can I get a sample to check out the top quality?
We quote according to your drawing, the price is suited, indicator the sample list.
What is your principal merchandise ?
Our Major items are consist of ball screw,linear information,arc linear guide,ball spline and ball screw linear CZPT rail module.
Specifying a Ball Screw
When you need to have a substantial-good quality ball screw, it is essential to select one with the proper proportions and specifications. When you are hunting for the ideal item, you ought to contemplate features this kind of as preloading, surface area finish, and inner return method. You can understand a lot more about these features in this post. If you happen to be uncertain which variety of ball screw to decide on, speak to a reliable provider for even more assistance. To uncover the ideal merchandise for your demands, simply click below!
Brinelling
When specifying a Brinelling ball screw, it is vital to know how considerably axial load it can safely and securely bear. The static load ability, which is presented in the catalogue, applies only to pure axial loading, and any radial load that is more compact than 5% of the axial load will not pose a difficulty. For far more data, make contact with a CZPT engineer. Brinelling ball screw service daily life calculation must be carried out utilizing the pursuing knowledge:
Preload: The quantity of load a ball screw can take care of during a solitary revolution. Preload is the load used just before the ball screw begins shifting, and the load is normally among five and ten p.c of the dynamic capability. Nevertheless, a ball screw that is subject matter to vibration will knowledge greater preload, requiring a lot more regular lubrication. The resulting mechanical pressure could result in the ball screw to buckle, or trigger the nut to re-circulate the balls.
Vital ball velocity: The maximum speed at which the ball can move by means of the ball nut is called the crucial ball velocity. In contrast, operating the ball screw at its essential shaft velocity can direct to abnormal vibrations, top to premature failure of the finish support bearings and brinelling of the ball monitor. As a result, it is recommended to run a ball screw at a reduce velocity than the essential ball speed to prevent brinelling and plastic deformation of the balls.
Untrue brinelling: Untrue brinelling is a sort of Fretting. Fake brinelling takes place when the bearings are not rotating. The movement will end result in depressions or wear marks in the bearing raceway. This will lead to sound, dress in, and eventual tiredness. If these problems persist, a more recent ball screw must be employed to take a look at the system. The equipment ought to be run for many hrs and analyzed prior to changing the bearing.
Preloading
The approach of preloading ball screws minimizes backlash by applying force to the threads in the opposite route of the screw's course of rotation. It prevents any movement of the screw relative to the nut. A variety of approaches are utilised for preloading. A widespread one particular is to use outsized balls inside of the ball nut. A double nut technique may possibly also be utilised. Both techniques are equally powerful. Irrespective of the technique utilised, the finish end result is the identical - nominal backlash and increased efficiency.
In the standard technique of preloading ball screws, the motors operate simultaneously in opposite instructions, triggering them to have a relative movement of approximately equivalent magnitudes. This reduces the frictional resistance of the method, ensuing in fast traverse. The method is in a position to operate with small backlash throughout one hundred ten inches of journey, reducing the heat created by the push nuts and the problems connected with ball screw heating. Furthermore, this approach can be utilised in a broad assortment of programs.
Another technique of preloading ball screws is recognized as the ball-select method. This method consists of the use of over-sized balls that drive the balls into more contacts with the screw and nut than a typical ball screw. The gain of this strategy is that it decreases backlash simply because the balls are not machined to large tolerances. The downside of this approach is that the ball screw will value more to manufacture than a standard ball screw and nut.
A traditional style includes a mechanical system that utilizes a sequence of balls to rotate a shaft. The issue of backlash is exacerbated by the mass of the shaft. The mechanical method is a lot more complicated than essential and frequently demands a great deal of energy. The existing invention removes these troubles by providing an enhanced approach and equipment for driving ball screws. This approach supplies a much more successful preload drive that is dynamically adjustable although the mechanism is running. The technique can also increase friction and put on.
Inner return method
There are two different types of ball screws. The first sort is exterior and the 2nd is interior. The external kind utilizes return tubes that protrude from the ball nut and increase earlier mentioned and all around the outside the house of the screw. The internal variety uses a one tube that spans the ball observe, even though the a lot more common style employs a number of tubes spanning 1.5 to 3.5 ball tracks. The internal method requires a solitary return tube and numerous pickup fingers that guide the balls into the tubes.
The exterior return tube layout is an simpler, much less expensive selection. The external ball return program has minimal space but can handle a wide variety of shaft diameters and prospects. Even so, its physical size tends to make it incompatible with numerous high-pace purposes. For that reason, careful thing to consider should be provided to the mounting alternatives. Interior ball return programs are very best suited for little sales opportunities and ball measurements. Individuals that need a substantial pace will probably reward from the exterior ball return program.
Internal ball screw technological innovation has also held tempo with the requires of linear push systems. Ball screw technological innovation is now much more resilient than at any time. Robust internal ball return programs flow into ball bearings via a solid pickup pin. These deflectors support the balls return to the screw in the appropriate place. They are critical factors in pc-controlled motion management methods and wire bonding. If you might be interested in the most current developments in linear screw technologies, get in touch with us right now.
Ball screws are superior to direct screws in several techniques. Ball screws are far more effective than guide screws, changing ninety% of rotational movement into linear motion. As a outcome, they are far more high-priced than direct screws and acme screws. They also give a smoother motion in excess of the total vacation selection. Additionally, they need much less energy for the exact same overall performance. It truly is no surprise that the ball screw is so well-known in many different programs.
Area complete
The surface area finish of a ball screw is one particular of the crucial aspects in identifying the functionality of the technique. A ball screw with a very good floor end has exceptional performance in rolling resistance, backlash, and dress in characteristics. Nonetheless, it is critical to improve the floor finish of a ball screw to accomplish precision motion, reduced put on, and minimal sound. To accomplish this, special wire brushes will be utilised to polish precision-ground shafts.
For a ball screw to perform well, it need to be hard, have a clean floor, and retain lubricant. The surface area finish of a ball screw should be sleek, free of charge of cracks, and keep the lubricant well. Cracks and annealing are the two unwanted throughout the manufacturing process, so a quality machine must be employed for its surface area finish. For the duration of the generation process, a CBN chopping insert with entire spherical or gothic arch profile can be utilized to attain a high-quality area complete.
An additional ending procedure used in the manufacture of ball screws is lapping. Lapping increases area quality and journey variation. It involves complex relative actions of abrasive particulates with the workpiece. This eliminates a slender layer of materials from the workpiece, improving its surface area quality and dimensional accuracy. The lapping procedure can be carried out under lower-strain circumstances. It also enhances the friction torque and lubrication.
In lapping experiments, friction torque has the premier influence on vacation variation and surface roughness. A friction torque of about one N x m is ideal. In addition, rotational pace has only a small result. The best mix of these parameters is 1-1.5 N x m and 30 rpm. The minimum floor complete of a ball screw is close to 800 mesh. The smallest variation in travel is observed at about half-way by means of the vacation.
Lubrication
Proper lubrication of ball screw assemblies is vital to sustain ideal efficiency and lifestyle. Ball screw assemblies need to be lubricated with grease, which is released straight into the ball nut. The lubrication port can be situated at a variety of spots on the merchandise, which includes on the flange or in the exterior threads of the ball nut. Some ball nuts also characteristic a zerk fitting for less difficult lubrication.
The lubrication of ball screws is needed in the situation of functioning problems in excess of 100oC. The bare minimum load for a ball screw is typically recognized with a preload force. The lubricant is conveyed via the slim lubrication gap due to the relative movement of the two surfaces. The enhanced viscosity of the lubricant permits separation of the speak to surfaces. To keep away from over-lubrication, it is essential to verify the lubricant degree regularly.
The oil utilized in lubrication of ball screw assemblies can be either mineral or synthetic. The oil is composed of mineral or synthetic oil, additives, and a thickening agent, such as lithium or bentonite. Other thickening agents consist of lithium, barium complexes, or aluminum. The lubricant quality NLGI is a widely utilized classification for lubricating greases. It is not enough to pick a certain variety of lubricant for a distinct application, but it offers a qualitative evaluate.
Regardless of being crucial to the efficiency of a ball screw, lubrication is also vital to its lifespan. Various sorts of lubricant provide corrosion protection. Ahead of making use of a lubricant, make confident to totally thoroughly clean and dry the ball screw. If there is any buildup of grime, it may damage the screw. To avoid this from occurring, you can use a solvent or lint-free of charge cloth. Lubrication of ball screw assemblies can drastically lengthen the life of the assembly.
