Archive for category: Product News

Screw rod is one of the common product components of large-scale machinery, and its importance has been well known by more and more people. For example, people engaged in industrial mechanization also regard screw rod as a sign that the machine can run stably and normally. It can be seen that its functionality is relatively strong, mainly in the following industries:

In the electronic and mechanical industry, there are many equipments that use screw rods, such as measuring instruments, which have high requirements for measuring accuracy.

In the field of machinery, it has a wide range of products, because in the machinery industry, machinery has high requirements for the processing of each workpiece, whether it is milling machine, grinding machine, drilling machine, lathe, etc., as long as it is used, the precision error is generally below 0.1 mm.

Screw rod is also widely used in the field of numerical control, and many CNC mechanical equipment are large, which can realize automatic processing, but this will not affect its processing accuracy at all; However, with its application, the linear motion and reciprocating motion of CNC machining machinery can be freely converted, and the machining accuracy is also guaranteed.

As we all know, in the process of running the screw rod, the temperature will rise more or less, and the shaft will stretch due to thermal expansion, resulting in positioning accuracy error. Therefore, under the condition of strict positioning accuracy, corresponding cooling measures should be taken:

1. On the premise of meeting product requirements, minimize the pre-tightening amount of screw rod and bearing seat;

2. Choose a large lead as much as possible to reduce the rotating speed;

3. It is very important to choose suitable lubricant.

4. If conditions permit, use lubricating oil or cold air to forcibly cool the screw shaft.

To sum up, the above four measures can prevent the screw from generating high temperature in operation.

The problems caused by ball screw are various, and there is no fixed form. The ball screw shaft or nut sometimes falls off due to its own weight, and when it falls off carelessly, it may cause the loss of product function due to the collision of track or the damage of circulating parts. At this time, it needs to be checked by the company. If there are scars and damages on circulating parts, outer diameter of shaft, track, etc., it will cause poor circulation, which will lead to the loss of product function. Only through correct detection to determine the real cause of the problem, can it be repaired quickly and accurately.

If there is no preparation and inspection before operating the ball screw, there may be faults. In order to reduce the occurrence of faults, how should everyone prepare for the normal operation of the ball screw? For the axis of rotation of ball screw, we should ensure that it is parallel to the linear guide rail of the main base of the machine tool, so as to avoid affecting the machining quality of ball screw due to imbalance.

For single nut ball screw, the gap between screw and nut pair cannot be adjusted. If it is detected that there is a gap between the lead screw and nut pair. First, check whether the thread arcs of the lead screw and nut are worn. If the wear is serious, a complete set of lead screw nuts must be replaced. Whether the axis line of ball screw nut can be coaxial with the hole of the motor seat can also directly affect the movement process of the machine tool.

If noise and vibration are generated in the work of machine tools, the problem of poor lubrication should be considered first after detecting that there is no problem in the mechanical transmission part. After many years of operation of machine tools, the automatic lubrication system of lead screw and nut is often blocked and cannot be lubricated automatically. Grease with high temperature resistance and high speed resistance can be added to bearings and nuts to solve the problem. Grease can ensure the normal operation of bearings and nuts for several years.

In the daily use of transmission parts, for the fluid lubrication of sliding guide rail surface, the movement accuracy error caused by the floating of oil film is inevitable. In most cases, fluid lubrication is limited to the boundary area, and direct friction caused by metal contact is inevitable, in which a large amount of energy is wasted by friction loss. On the contrary, because of the low friction energy consumption and the corresponding reduction of friction loss on the rolling surface, the linear guide rail system can be in a high-precision state for a long time. At the same time, due to the small amount of lubricating oil, grease lubrication is enough in most cases, which makes it very easy to design and maintain the lubrication system of machine tools.

There is a slight or negative gap between the slider of the rolling linear guide rail and the guide rail, so the overall rigidity and movement accuracy of the guide rail can be greatly improved. The E2 self-lubricating module product with innovative design of linear guide rail combines the concept of removable type, which makes the linear guide rail extend its maintenance cycle. E2 self-lubricating module is characterized by cost saving, cleanness and environmental protection, flexible installation, convenient disassembly and assembly and easy maintenance. The transparent oil tank design can check the oil quantity at any time, and the corresponding lubricating oil can be selected. It can be used in special environment such as dust, bad weather and water environment.

In order to improve the motion accuracy and accuracy maintenance, linear guideway requires enough negative numbers, which are two contradictory aspects. When the working time is too long, the steel balls begin to wear, and the preload acting on the steel balls begins to weaken, which leads to the decrease of the motion accuracy of the working parts of the machine tool. If you want to keep the initial accuracy of the linear guide, you must replace the guide bracket or even the guide. If the guide rail system has been preloaded. The accuracy of the system has been lost,  and the only way is to replace the linear slider and guide rail.

The ball screw is composed of a screw rod, a nut, a steel ball, a pre-compression piece, a steering gear, and an anti-skid piece. Its function is to convert rotary motion into linear motion, and the important significance of its development is to transform the bearing from sliding motion into rolling motion. Ball screws are widely used in various industrial equipment and precision instruments because of their low frictional resistance. Transmission components often used in machine tools and precision machinery, whose main function is to convert rotary motion into linear motion, or the rotor into axial repetitive force, and have the characteristics of high precision, reversibility, and high efficiency. Now we mainly introduce the type of ball screws .

1. Heavy-duty ball screw: which can bear large axial load, is suitable for all-electric design machines, air compressors, semiconductor manufacturing devices and forging manufacturing devices, etc.
2. High-speed ball screw : with high-speed feeding, high acceleration, high rigidity, low vibration and low noise. Use and machine tool fast feed, abrasive high-speed cutting center machine and high-speed longitudinal load cutting center, etc.
3. The cooled ball screw:  forced into a whole in the nut, so that the heat source of the low ball screw during high-speed operation is generated by thermal expansion. To achieve high speed and high precision, use high-speed machine tools and high-speed longitudinal load machining machine tools.
4. Nut-rotating ball screw: which integrates ball nut and ball screw to perform linear motion of rotation and linear transmission, is used in semiconductor machinery, industrial robots, woodworking machines, laser processing machines and conveying devices, etc.
5. Self-lubricating ball screw: Self-lubricating ball screw with detachable oil removal device does not need to lubricate pipeline system and equipment, and the cost of oil replacement and waste oil treatment, and greatly reduces the cost of oil products.
6. Silent ball screw:  Ball spacer rings with special grooves are arranged between the balls, which can restrain the noise caused by the collision between the balls and the wear caused by the balls, and make the ball screw move quieter and smoother.

7. There are other grades of ball screws and conversion grade ball screws. There are rollers on the surface of the screw to roll threads. After heat treatment and polishing, it can be assembled into a simple and reasonable price, and it can be shipped quickly.