Fabricación de Husillos a Bolas de precisión -Shuton-

1. CALCULATION OF A HORIZONTAL BALLSCREW DRIVE CHARACTERISTICS

Taking the nominal diameter, ball diameter, lead, number of circuits and the lenght of the screw, bearing and pulleys; speed, acceleration, static and dynamic load capacity, stiffness, life, critical rotation speed, buckling load, response of the engine, optimal lead and optimal reduction to reached the highest acceleration, optimal preload to reach the longest life, dilatation of the screw, screw´s tensioned load to balance the dilatation, arrows of the screw, axial loads, time and distance done at high speed, ...are calculated This section becomes very interesting to know if a certain drive is better than a similar modified one. For example, if there are doubts about which lead should be used, the characteristics of both are calculated and the one with the best results is choosen.

2. CALCULATION OF A CERTAIN VERTICAL BALLSCREW DRIVE CHARACTERISTICS

Data and calculations are similar to the horizontal ballscrew´s ones, expect from the fact that axial loads and accelerations are different when ascending or descending. Besides, there is an explanation about some additional conditions that should be fulfilled.

3. CALCULATION OF A CERTAIN INCLINED BALLSCREW DRIVE CHARACTERISTICS

Similar to the vertical ballscrew, expect from the fact that the calculations are for an inclined ballscrew with a determined angle.

4. ELECTION OF SCREW, ENGINE, BEARINGS, PULLEYS, .... OF A DRIVE

In this section the process is just opposite to the previous ones. Probably it is the most interesting one, because it is the way that the drive designer should follow.

Taking the searched characteristics of the drive, such as mass to move, done real length, feed speed, acceleration, ballscrew´s stiffness and life; required nominal diameter, diamtre of the balls, number of circuits, rotation speed of the screw or nut, lead, bearings, engine, reduction and pulleys are calculated.

5.CALCULATION OF THE MAXIMUN RADIAL DEFORMATION AND GRAPHIC REPRESENTATION OF A HORIZONTAL

SCREW´S DEFORMATION

In this section the maximun radial deformation of the screw, produced by its own weight is calculated and the obtained deformation is graphically represented. This way, it can be seen how all the screw´s points move in the radial direction. The maximun radial deformation is calculated for the worst situation, when the nut is at the end. The calculation is made for the four dispositions of supports when there are no middle supports; and for end-fixed/end-fixed and end-fixed/end-supported disposition, when there is a middle support. The following data are necessary for this calculation: nominal diameter of the screw, ball diameter, length between the supports of the screw and the disposition of the supports.

6. TABLES OF SCREWS WITH THEIR GEOMETRY, STATIC AND DYNAMIC LOAD CAPACITIES, STIFFNESS....

There is table with all the screws and nuts made by SHUTON, (internal and external re-circulation, single, double and compact nuts), with geometric meassures,

and dynamic load capacity, stiffness of the different parts of the screw, ...

If you want us to calculate any drive, please ask for our technical application-forms in the "Contact" section and send it fulfilled to our technical department.

	Ballscrew drive calculation program

		SHUTON has a very complete program to calculate all about a ballscrew drive. The program has the following sections: 1.- Calculation of a horizontal ballscrew drive characteristics. 2.- Calculation of a vertical ballscrew drive characteristics. 3.- Calculation of a inclined ballscrew drive characteristics. 4.- Election of screw, engine, bearings, pulleys, ... of a drive. 5.- Calculation of the maximum radial deformation and graphic representation of a horizontal screw´s deformation. 6.- Tables of screws with their geometry, static and dynamic load capacity, stifflness,... Next, each section is deeply explained.
		1. CALCULATION OF A HORIZONTAL BALLSCREW DRIVE CHARACTERISTICS Taking the nominal diameter, ball diameter, lead, number of circuits and the lenght of the screw, bearing and pulleys; speed, acceleration, static and dynamic load capacity, stiffness, life, critical rotation speed, buckling load, response of the engine, optimal lead and optimal reduction to reached the highest acceleration, optimal preload to reach the longest life, dilatation of the screw, screw´s tensioned load to balance the dilatation, arrows of the screw, axial loads, time and distance done at high speed, ...are calculated This section becomes very interesting to know if a certain drive is better than a similar modified one. For example, if there are doubts about which lead should be used, the characteristics of both are calculated and the one with the best results is choosen. 2. CALCULATION OF A CERTAIN VERTICAL BALLSCREW DRIVE CHARACTERISTICS Data and calculations are similar to the horizontal ballscrew´s ones, expect from the fact that axial loads and accelerations are different when ascending or descending. Besides, there is an explanation about some additional conditions that should be fulfilled. 3. CALCULATION OF A CERTAIN INCLINED BALLSCREW DRIVE CHARACTERISTICS Similar to the vertical ballscrew, expect from the fact that the calculations are for an inclined ballscrew with a determined angle. 4. ELECTION OF SCREW, ENGINE, BEARINGS, PULLEYS, .... OF A DRIVE In this section the process is just opposite to the previous ones. Probably it is the most interesting one, because it is the way that the drive designer should follow. Taking the searched characteristics of the drive, such as mass to move, done real length, feed speed, acceleration, ballscrew´s stiffness and life; required nominal diameter, diamtre of the balls, number of circuits, rotation speed of the screw or nut, lead, bearings, engine, reduction and pulleys are calculated. 5.CALCULATION OF THE MAXIMUN RADIAL DEFORMATION AND GRAPHIC REPRESENTATION OF A HORIZONTAL SCREW´S DEFORMATION In this section the maximun radial deformation of the screw, produced by its own weight is calculated and the obtained deformation is graphically represented. This way, it can be seen how all the screw´s points move in the radial direction. The maximun radial deformation is calculated for the worst situation, when the nut is at the end. The calculation is made for the four dispositions of supports when there are no middle supports; and for end-fixed/end-fixed and end-fixed/end-supported disposition, when there is a middle support. The following data are necessary for this calculation: nominal diameter of the screw, ball diameter, length between the supports of the screw and the disposition of the supports. 6. TABLES OF SCREWS WITH THEIR GEOMETRY, STATIC AND DYNAMIC LOAD CAPACITIES, STIFFNESS.... There is table with all the screws and nuts made by SHUTON, (internal and external re-circulation, single, double and compact nuts), with geometric meassures, and dynamic load capacity, stiffness of the different parts of the screw, ... If you want us to calculate any drive, please ask for our technical application-forms in the "Contact" section and send it fulfilled to our technical department.