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Torque Specification For Screws

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July 24, 2010 by Ultra Flight

Torque Specification For Screws
Torque Specification For Screws

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How to Select the Tool Chuck

Although a complete comparison machining center, tool chuck in a small proportion of value, but it is to connect an important tool spindle and tool system. As the quality of the tool chuck has great influence on the final processing of results, so choose the best tool chuck the importance of not inconsiderable.The tool chuck, the performance requirements of the most important high speed rotation of the tool clamping force, path accuracy, and can reduce the vibration of jumping the balance of quality. Tool chuck diameter must be less than the precision jump 0.003mm. In order to support machine direct drive high power, to reduce the spindle, chuck and tool weight of the composition of the system was good for cutting very favorable results.

In order to get a good cutting results, the user of the tool chuck of claim will normally have a clear definition and market a variety of different types of chucks to meet these requirements. Tool clamping systems for different technologies with different features and processing advantages, the process according to the user's specific purpose, it is possible to find the best tool chuck.This article focuses on the following four types of tool clamping system: ? hydraulic tool chuck; multilateral clamp type tool chuck; general purpose tool chuck; hot loading tool chuck.

Hydraulic Tool Chuck

Chuck is a hydraulic tool for use in most of the cutting tool clamping system. Hydraulic cutting tool chuck chuck used with the conventional tool clamping a different way of force by a screw mechanism (by the thread, the composition of the piston and seals) to introduce, through the operation (rotating) screw mechanism can be generated internally in the chuck uniform fluid pressure. The pressure put on transfer to an expansion of steel, for clamping tool.Hydraulic tool clamping system to achieve the best accuracy and less than 0.003mm diameter jump repeatability. Hydraulic chuck clamping tool, the use of knife handle in the hydraulic oil, can provide high clamping force. As a result of tool vibration while avoiding the workpiece material due to a small hill, the user can obtain high surface quality and longer processing time for chuck work.

Hydraulic cutting tool chuck can not only maintenance free and prevent dirt entering, and easy to use, and can clamp the tool to provide high security.

Multilateral Clamp Type Tool Chuck

Multilateral clamp type tool chuck exception structure design is simple: use a polygon hole grinding three positions firmly clamped in the tool. In the high speed machining, the multilateral clamp is an ideal tool holding method, because the tool by clamping the elastic deformation of the chuck to achieve. The main advantage of this tool chuck is its structure is very compact form factor.Currently on the market, there are two types of multilateral clamp type tool chuck, can cover a variety of cutting. One is "slim" chuck, and it features a gripping tool shank is very thin, long overhang, up is good. This chuck can also be used for short clamping tool, the advantage of using lower cost. The other is "high rigidity" chuck, the handle body, so the rigidity is also better able to provide high quality radial force compensation. Both types of chuck can be used plus pole to complete the difficult processing tasks in a better process flexibility.As the pole of the clamping tool or increase in the tool shank within the elastic range, and therefore will not affect the tool life. Use of an external clamping device can be completed within a few seconds to replace the tool. The device does not require any external energy, can be used anywhere. Such characteristics make the multilateral Clamping Tool clamping system is suitable for processing situations that require frequent tool change.

Universal Tool Chuck

There are two general purpose tool chuck optional types: one for light load processing, another for medium to heavy machining. Universal tool chuck a very important advantage is a good vibration damping, can improve tool life and workpiece surface finish quality, the price of most high end sleeve type tool clamping systems comparable.his tool is used with hydraulic collet chuck clamping similar to the expansion of the technology tool, but its expansion through the mechanical action rather than through the liquid medium to achieve. Thus, the clamping system can provide users with excellent vibration damping and high jump track accuracy (measured at the surface than in the chuck 0.005mm).Compared with the sleeve type tool chuck, chuck and other general purpose tool features include: can chuck tighten to hard stop position (without the use of torque wrenches); can circle the entire shank tool for strong and safety clamp (sleeve type tool chuck clamping force at the top near the big hole in the bottom of the clamping force clamping small); by using the middle set of standards, can achieve flexible clamping; through the use of an internal length of the adjustment screw, enabling very precise axial length adjustment.

Heat Loading Tool Chuck

Heat loading tool chuck is based on the principle of expansion and contraction, using induction heating technology to chuck.Through an induction coil (heating installations in some high frequency coil) on the folder location to insert the head cutter for precise heating, the tool inserted through the cooling units for cooling of the chuck, chuck around the tool shank parts freeze contraction, can be clamped tool and provides a solid able to withstand high torque clamping force.Heat loading tool chuck has many advantages, including high jump track accuracy (less than 0.003mm), high transmission torque and more compact designs. Performance in vibration, hot loading hydraulic chuck chuck will have to inferior and multilateral clamping chucks.

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