Safety Chuck Automatic Safety Overload Tapping Chuck Technology And Its Working Principle

Safety Overload Tapping Collet Overview:

When the tap is working, the main resistance is the torque, and the cutting force of the tap is different from other tools. It is not controlled by the machine feed mechanism, so the tapping chuck for connecting the machine tool and the tap is in the tapping process. It plays a vital role.

Old-fashioned tapping chucks are usually used. It consists of a chuck body, a clutch member, a butterfly spring member, a tip member, a adjusting nut member, a collet seat member and the like. During operation, the nut is pressed by the adjusting nut, and the clutch is tightened to complete the tapping.

Because the tapping chuck transmission system is simple, the matching precision is low, and there is no safety system, it can only be used on ordinary drilling machines and common equipment, and can not guarantee the taps from time to time when tapping; the tension of the adjusting nut is tight, and the pressure is controlled. Size, but there is no accurate data mark, so when the tapping encounters hard material, the tapping is blocked, and the tap is slipping, the nut can only be adjusted by experience to increase the pressure; when the tap is subjected to the torque greater than the pressure generated by the butterfly spring, The meshing between the clutches will be loose and disengaged. If the chuck is mounted on the automatic feed machine, the tap will be broken by the top, which will affect the mass production.

The development of modern manufacturing, the universal application of numerical control equipment urgently requests the development of domestically produced safety system tapping chucks. The following is the development process of this new M tapping chuck from the aspects of working principle and manufacturing difficulties.

How safe overload tapping chucks work

The safety overload tapping chuck is connected by the connecting sleeve member, the transition sleeve member and the scale sleeve member, and the steel ball member is positioned by two bodies.

Working principle: With 2 positioning pins and 4 screws passing through the coupling sleeve, the CNC machine tool spindle and the tapping chuck are connected together, so that the precision of the tapping chuck and the machine tool is ensured first; the outer sleeve member is pulled, Affirming the torque required for tapping, the butterfly spring will be pressed by the force, positioned by the steel ball, interlocking the sizing sleeve, and stopping the tapping.

The tapping chucks are all applied with a butterfly spring to generate pressure. The old chucks are driven by clutches, and the new chucks are linked by steel balls. The clutch fit is a tooth-shaped fit, the positioning is not fine, and it is easy to wear. As long as the force of a set of butterfly springs is uneven, it will not reflect the true force of the butterfly spring and affect the application.

The new type of chuck, steel ball is not easy to wear, accurate positioning; each group of 36, a total of 6 sets of contour butterfly springs to ensure the average force; the scale sleeve is engraved with 200 ~ 1400 mark, according to the tap torque , affirmative mark value, locked with the top wire member 39 to avoid loosening.

The new safety overload tapping chuck adds a safety system. In tapping, when the tap encounters hard material and chipping, it is blocked, and the tap does not work, that is, when the tap torque is greater than the pressure of the butterfly spring, the tap sleeve with the tap and the transition sleeve are connected to the positioning steel ball. Move the semi-spherical groove of the scale sleeve along the waist groove of the transition sleeve to the plane, the opportunity spindle is still rotating, and the chuck without the safety insurance system will cut the tap; The tapping chuck of the safety system prevents the occurrence of such an accident.

When the steel ball moves to the plane, the tap stops rotating and slips, the safety system will start, and the 18 positioning steel balls on the copper sleeve will slide along the positioning sleeve of the transition sleeve and the connecting sleeve, and the stroke is 25mm~ Between 50mm; due to the rotation of the machine tool, the part of the connecting sleeve and the transition sleeve that is driven is also rotating, and the scale sleeve is partially broken. Because the tap tapping is blocked, the rotation is stopped, because of the safe stroke operation of 25mm~50mm. The person will find that the tapping is blocked, and the machine is stopped in time to prevent the accident. Before the work, the screw 1 is adjusted to adjust the safety stroke. The larger the stroke is, the higher the safety factor is.