Merchandise Description
Item description
Ball screw assembly is consisted of ball screw nut and rod. The operate is transfer the rotary movement into linear motion or transfer the linear movement into rotary movement.Ball screw is broadly utilized for all varieties of industrial equipments and precision instrument.Since 1964, the organization produced the China's initial ball screw, it has on the leading position in China in the study and manufacture of ball screw.
Specifications
Ball kind:ø8 - ø200High transmission fee
Transmission reversibility
long service life,great synchronicity
Max potential is 376 tons.
Max. one to 10m,joint to 19m
It is broadly employed in all varieties of industrial equipments,precision NC machine tool
FAQ
Why pick AZI China?
With a lot more than sixty a long time of generation expertise, good quality assurance,factory straight price tag.
How can I get a sample to check the quality?
We estimate in accordance to your drawing, the value is suitable, indication the sample listing.
What is your primary products ?
Our Main goods are consist of ball screw,linear manual,arc linear manual,ball spline and ball screw linear CZPT rail module.
Specifying a Ball Screw
When you require a substantial-high quality ball screw, it is critical to choose 1 with the correct dimensions and specs. When you are searching for the greatest product, you should think about features this kind of as preloading, floor end, and inner return program. You can find out a lot more about these characteristics in this report. If you happen to be unsure which type of ball screw to choose, get in touch with a respected provider for further advice. To uncover the ideal merchandise for your requirements, simply click below!
Brinelling
When specifying a Brinelling ball screw, it is critical to know how significantly axial load it can safely and securely bear. The static load potential, which is given in the catalogue, applies only to pure axial loading, and any radial load that is smaller than 5% of the axial load won't pose a difficulty. For far more details, contact a CZPT engineer. Brinelling ball screw provider daily life calculation need to be performed using the following knowledge:
Preload: The volume of load a ball screw can manage for the duration of a single revolution. Preload is the load utilized prior to the ball screw starts off relocating, and the load is generally between five and ten percent of the dynamic ability. Nevertheless, a ball screw that is subject matter to vibration will encounter larger preload, demanding more recurrent lubrication. The resulting mechanical tension might lead to the ball screw to buckle, or cause the nut to re-circulate the balls.
Vital ball pace: The maximum velocity at which the ball can shift by means of the ball nut is referred to as the vital ball pace. In contrast, running the ball screw at its essential shaft pace can guide to abnormal vibrations, leading to premature failure of the stop assistance bearings and brinelling of the ball observe. As a result, it is recommended to function a ball screw at a decrease pace than the essential ball velocity to avert brinelling and plastic deformation of the balls.
Untrue brinelling: False brinelling is a form of Fretting. False brinelling takes place when the bearings are not rotating. The motion will consequence in depressions or wear marks in the bearing raceway. This will cause sound, use, and eventual exhaustion. If these conditions persist, a newer ball screw need to be utilized to examination the program. The equipment ought to be operate for a number of hours and analyzed ahead of changing the bearing.
Preloading
The procedure of preloading ball screws minimizes backlash by making use of strain to the threads in the opposite path of the screw's course of rotation. It helps prevent any movement of the screw relative to the nut. Different techniques are utilised for preloading. A widespread 1 is to use oversized balls within the ball nut. A double nut system may also be employed. The two methods are equally powerful. Regardless of the approach utilised, the end consequence is the same - small backlash and increased performance.
In the standard technique of preloading ball screws, the motors work simultaneously in opposite directions, causing them to have a relative movement of around equivalent magnitudes. This minimizes the frictional resistance of the technique, resulting in rapid traverse. The system is capable to run with nominal backlash in the course of a hundred and ten inches of vacation, minimizing the heat designed by the drive nuts and the troubles associated with ball screw heating. Furthermore, this method can be utilized in a extensive variety of applications.
One more method of preloading ball screws is known as the ball-choose technique. This technique involves the use of above-sized balls that pressure the balls into a lot more contacts with the screw and nut than a normal ball screw. The edge of this technique is that it reduces backlash since the balls are not machined to higher tolerances. The downside of this method is that the ball screw will cost more to manufacture than a common ball screw and nut.
A conventional design involves a mechanical mechanism that uses a sequence of balls to rotate a shaft. The issue of backlash is exacerbated by the mass of the shaft. The mechanical program is much more sophisticated than necessary and typically calls for a whole lot of effort. The current invention eradicates these difficulties by offering an improved method and apparatus for driving ball screws. This method offers a much more efficient preload drive that is dynamically adjustable whilst the system is operating. The technique can also increase friction and use.
Inner return technique
There are two diverse types of ball screws. The very first variety is external and the second is inner. The exterior kind employs return tubes that protrude from the ball nut and prolong over and close to the outdoors of the screw. The inner sort makes use of a single tube that spans the ball keep track of, even though the more common style uses several tubes spanning 1.5 to 3.5 ball tracks. The interior system entails a solitary return tube and a number of pickup fingers that information the balls into the tubes.
The exterior return tube style is an easier, significantly less costly decision. The external ball return technique has constrained room but can take care of a extensive assortment of shaft diameters and sales opportunities. Even so, its actual physical size makes it incompatible with several large-velocity programs. As a result, careful thing to consider need to be given to the mounting options. Interior ball return systems are very best suited for little prospects and ball measurements. Individuals that need to have a higher velocity will very likely gain from the external ball return method.
Interior ball screw technologies has also stored tempo with the demands of linear drive techniques. Ball screw technologies is now a lot more tough than at any time. Strong internal ball return methods flow into ball bearings through a strong pickup pin. These deflectors support the balls return to the screw in the correct location. They are critical parts in computer-managed motion management techniques and wire bonding. If you are interested in the most recent advancements in linear screw engineering, contact us nowadays.
Ball screws are excellent to lead screws in several ways. Ball screws are far more successful than direct screws, changing ninety% of rotational movement into linear movement. As a consequence, they are far more expensive than direct screws and acme screws. They also give a smoother motion over the whole vacation range. Additionally, they call for considerably less power for the exact same functionality. It truly is no wonder that the ball screw is so well-known in several various apps.
Area complete
The surface end of a ball screw is 1 of the key aspects in deciding the efficiency of the method. A ball screw with a excellent area end has excellent overall performance in rolling resistance, backlash, and wear qualities. Nevertheless, it is crucial to boost the surface finish of a ball screw to accomplish precision motion, reduced wear, and low noise. To obtain this, specific wire brushes will be utilized to polish precision-floor shafts.
For a ball screw to execute nicely, it must be challenging, have a easy surface, and retain lubricant. The floor finish of a ball screw must be easy, totally free of cracks, and keep the lubricant well. Cracks and annealing are each undesirable for the duration of the producing procedure, so a high quality machine need to be used for its floor end. For the duration of the manufacturing process, a CBN cutting insert with complete spherical or gothic arch profile can be utilized to achieve a substantial-good quality surface finish.
Another finishing procedure utilized in the manufacture of ball screws is lapping. Lapping enhances surface quality and journey variation. It involves sophisticated relative movements of abrasive particulates with the workpiece. This gets rid of a slender layer of material from the workpiece, improving its surface top quality and dimensional precision. The lapping method can be carried out underneath low-force problems. It also improves the friction torque and lubrication.
In lapping experiments, friction torque has the largest influence on vacation variation and area roughness. A friction torque of about one particular N x m is optimum. In addition, rotational pace has only a minimal impact. The best mixture of these parameters is 1-1.5 N x m and thirty rpm. The minimal floor complete of a ball screw is all around 800 mesh. The smallest variation in vacation is observed at around 50 percent-way by way of the vacation.
Lubrication
Correct lubrication of ball screw assemblies is crucial to preserve ideal functionality and existence. Ball screw assemblies must be lubricated with grease, which is introduced immediately into the ball nut. The lubrication port can be situated at a variety of locations on the merchandise, which includes on the flange or in the external threads of the ball nut. Some ball nuts also characteristic a zerk fitting for easier lubrication.
The lubrication of ball screws is essential in the scenario of running situations more than 100oC. The bare minimum load for a ball screw is usually understood with a preload power. The lubricant is conveyed via the slender lubrication hole due to the relative movement of the two surfaces. The increased viscosity of the lubricant enables separation of the speak to surfaces. To steer clear of over-lubrication, it is important to check out the lubricant amount frequently.
The oil utilised in lubrication of ball screw assemblies can be both mineral or synthetic. The oil is composed of mineral or synthetic oil, additives, and a thickening agent, this sort of as lithium or bentonite. Other thickening brokers incorporate lithium, barium complexes, or aluminum. The lubricant grade NLGI is a commonly utilised classification for lubricating greases. It is not enough to select a specific variety of lubricant for a distinct software, but it offers a qualitative evaluate.
In spite of currently being essential to the overall performance of a ball screw, lubrication is also important to its lifespan. Different types of lubricant offer corrosion protection. Before employing a lubricant, make sure to totally cleanse and dry the ball screw. If there is any buildup of dirt, it may possibly injury the screw. To stop this from transpiring, you can use a solvent or lint-totally free fabric. Lubrication of ball screw assemblies can greatly extend the life of the assembly.
