CN203171097U - Stepped tap - Google Patents

Abstract

The utility model aims to provide a stepped tap which is capable of improving the product quality while effectively improving the work efficiency for machining of stepped internal threads. The stepped tap comprises a handle portion and an edge portion which is mounted at the end of the handle. The stepped tap is characterized in that a plurality of sections of side edges with threads are arranged successively at positions from the end of the edge portion to the connection position between the edge portion and the handle portion, and diameters of the adjacent side edges increase successively from the end of the edge portion to the handle portion. During machining of the stepped internal threads, thread milling can be performed on pre-machined stepped holes through the plurality of sections of side edges with the threads, cutter changing in the whole working process is not needed, the coaxiality of the thread milling process is guaranteed, and the machining efficiency and the machining quality are improved.

Description

One species stage screw tap

Technical field

The utility model belongs to cutter manufacturing technology field, specially refers to a species stage screw tap.

Background technology

The processing method of the internal thread in tradition notch cuttype hole is to carry out the segmentation tapping with two different screw taps of diameter respectively, in tapping process, must change screw tap like this, had a strong impact on operating efficiency, and because successively the axiality of two screw taps of company may be different, therefore there are two sections risks that the internal thread hole axiality is different that process, may influence follow-up use.

The utility model content

The purpose of this utility model is to propose a species stage screw tap, can improve the quality of products when effectively improving the operating efficiency of the stepped internal thread of processing.

Ladder screw tap of the present utility model comprises shank and is installed in the blade of shank end, the end that key is described blade to the joint of blade and shank is disposed with the several sections side edges with screw thread, and the diameter of adjacent side edge is increased successively by the end of the blade direction to shank.

When the stepped internal thread of processing, the several sections side edges with screw thread can carry out thread milling to the good ladder sky of preprocessing simultaneously, in entire work process, need not to carry out tool changing, guaranteed the axiality of thread milling process, thereby improved working (machining) efficiency and crudy.

Further, the flight pitch of described all side edges is identical, so that each internal thread hole all can keep synchronous thread milling, and then guarantees crudy.

Ladder screw tap of the present utility model can be processed the stepped hole internal thread simultaneously according to the side edge by several sections different-diameters, effectively increases work efficiency, and can improve the quality of products, and reduces production costs.

Description of drawings

Fig. 1 is the structural representation of ladder screw tap of the present utility model.

The specific embodiment

Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are described in further detail.

Embodiment 1:

As shown in Figure 1, the ladder screw tap of present embodiment comprises shank 1 and is installed in the blade 2 of shank 1 end, the end of described blade 2 to the joint of blade 2 and shank 1 is disposed with two sections side edges 3,4 with screw thread, and the diameter of side edge 3 is less than the diameter of side edge 4.

When the stepped internal thread of processing, two sections side edges 3,4 with screw thread can carry out thread milling to the good ladder sky of preprocessing simultaneously, in entire work process, need not to carry out tool changing, guaranteed the axiality of thread milling process, thereby improved working (machining) efficiency and crudy.

Further, side edge 3,4 flight pitch are identical, so that each internal thread hole all can keep synchronous thread milling, and then guarantee crudy.

Claims (2)

1. a species stage screw tap, comprise shank and the blade that is installed in the shank end, the end that it is characterized in that described blade to the joint of blade and shank is disposed with the several sections side edges with screw thread, and the diameter of adjacent side edge is increased successively by the end of the blade direction to shank.

2. ladder screw tap according to claim 1 is characterized in that the flight pitch of described all side edges is identical.

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