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The utility model is an automatically replaceable drill bit, belonging to the field of drill bits.

Background technique:

When digging, the drill bit rotates around the vertical axis and moves axially at the same time.The soil is cut under the action of the torque and axial force of the drill bit, and is destroyed and smashed under the action of the squeezing and centrifugal force of the working blades, forming a soil flow that presses against the wall of the pit, and at the same time is lifted along the page to the surface.When the earth flow moves to the place where there is no pit wall, the broken soil is thrown around the pit due to the centrifugal force, completing the entire digging process.This kind of drill has not only high hardness but also improved compressive and bending strength.In order to save costs, many drill bits use welded shank structure. The original drill bit is made of cemented carbide as a whole, and the rear shank is made of stainless steel. The cost is greatly reduced. However, due to the use of different materials, its dynamic concentricity is not as good as solid carbide drills. , Especially in small diameter.

The prior art publication application number is CN201210566354.A triangular drill bit of 3, including a cutting edge, and a chip dividing groove is opened on the cutting edge.When the triangular drill provided by the present invention is used for processing aluminum alloy materials, because the aluminum alloy material is relatively soft, especially when the hole diameter is large and deep, the chip splitter can divide the wide aluminum chip into narrow aluminum chip, which makes chip removal convenient. The chip pockets are not easy to block the chips, and there is no phenomenon that the shank or the drill bit is broken due to the stuck drill bit, which reduces the scrap rate of the drill bit.At the same time, the triangular drill provided by the present invention has a simple manufacturing process, low processing cost, and is light in weight due to the opening of a chip splitter, and is convenient for manual sharpening. It can be changed to other drilling diameters as required..But the drill bit cannot be replaced quickly when it needs to be replaced.

Technical realization elements:

In view of the shortcomings of the prior art, the purpose of the present utility model is to provide an automatically replaceable drill bit, the structure of which includes a chuck handle, a connector, a holder sleeve, a holder, and a drill bit. The chuck handle is similar to the connector. Connected, the holder sleeve and the connector are connected by threads, the holder is arranged inside the holder sleeve, the drill bit is arranged inside the holder, and the clamping handle is provided with a clamping handle to prevent rotation Groove, the chuck handle anti-rotation groove is provided on the chuck handle surface, the connector is provided with a connector locking surface and a connector thread, the connector locking surface is provided on the surface of the connector, and the connector thread is provided On the surface of the connecting head, the drill bit is provided with a drill shank, a secondary cutting edge, a flank surface, a main cutting edge, a chisel edge, a rake surface, and a thread groove, the drill shank is arranged behind the drill bit, and the secondary cutting edge is provided On the side of the drill, the flank surface is provided between the main cutting edge and the secondary cutting edge, the chisel edge is provided in front of the flank, the rake surface is provided behind the main cutting edge, and the thread groove is provided in the front Behind the blade.

Further, the holder sleeve is provided with a sleeve loosening surface.

Further, the sleeve elastic plate surface is provided on the surface of the holder sleeve, and the sleeve elastic plate surface is provided with

Posted by: philipjere at 02:07 AM | No Comments | Add Comment
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