What is the toolholder pull stud and what are its characteristics?

November 08, 2021

High speed, high efficiency, compound, high precision, high reliability and environmental protection are not only the development trend of advanced cutting technology, but also the requirements for NC tool holder. The tool handle is a kind of tool, which is the connection between the mechanical spindle and the tool and other accessories. At present, the main standards include several spindle models of BT, SK, capto, BBT, HSK, etc. Pull nails, also known as core pulling rivets, are used for single-sided riveting, but special tools - pull nails Qiang (manual, electric and pneumatic) must be used for riveting.

This kind of rivet is especially suitable for riveting occasions where it is inconvenient to use ordinary rivets (riveting must be carried out from both sides), so it is widely used in buildings, automobiles, ships, aircraft, machinery, electrical appliances, furniture and other products. Among them, the open flat round head core pulling pull nail is the most widely used. The countersunk head core pulling pull nail is suitable for riveting occasions requiring smooth performance, and the closed core pulling pull nail is suitable for riveting occasions requiring high load and certain sealing performance. BT tool holder with 7 / 24 taper has been used on the machining center to realize the connection between the tool and the machine tool spindle. The standard 7 / 24 cone connection has many advantages.

For example, it can realize rapid loading and unloading of tools; Under the axial tension of the pull rod, the cone of the tool handle is in close contact with the inner conical surface of the spindle. The solid cone directly supports the tool in the conical hole of the spindle, which can reduce the overhang of the tool; Only one dimension needs to be processed to high precision, so the cost is low and reliable.

When it comes to the tool handle, we have to mention that one of the factors affecting the quality, style, durability and service life of the tool is the material of the tool handle. Of course, we can't say for sure that "a certain material must be better than other materials. Each material has its advantages and disadvantages, considering its shape, texture, quantity, wear resistance and so on".

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