CN103008800A - Sectional tap - Google Patents

Abstract

The invention provides a sectional tap which is mainly used for processing high-hardness material and is characterized in that a group of traditional screw taps are combined into one tool, so that the too changing and tool alignment time is saved, and the production efficiency is improved. By applying the sectional tap provided by the invention, the tapping cost is greatly lowered, and the efficiency and the quality are improved.

Description

A kind of sectional tap

Technical field

The invention belongs to cutter manufacturing technology field, specially refer to sectional tap.

Background technology

Processing method during the high hardness material machining screw is to process thread Pilot hole with suitable drill bit first, and then removes to attack screw thread processed with screw tap, when attacking screw thread processed with single screw tap or in groups twice on screw tap or repeatedly attack the system finish.Its difficulty is: workpiece material hardness is higher, carrying out screw thread adds and is difficult to guarantee its machining accuracy man-hour, and easy breaking, cause and do over again and to get the number of times of disconnected cone frequent, not only productivity ratio is low: adopt when screw tap is arranged in groups, although cutter life increases, its tool changing and toolsetting time are long long, cause inconvenience in production.

Summary of the invention

The objective of the invention is to propose high hardness material is carried out a kind of sectional tap of screw thread processing, with tradition in groups screw tap be combined into a screw tap, when reasonably distributing allowance, reduced tool changing and toolsetting time.Effectively raise the operating efficiency when high hardness material carried out internal thread machining, when guaranteeing product quality, can also reduce production costs.

Sectional tap of the present invention comprises shank and blade, and key is that described blade cutting cone has the structure of two or more different cone angles, and small-angle goes surplus, and large cone angle guarantees thread size.

Sectional tap of the present invention is compared traditional screw tap, the reasonable distribution of surplus, and the surplus that reduces to process reduces to process resistance greatly, and cutting edge has been carried out effective protection, thereby has greatly improved the service life of screw tap; Compare in groups screw tap of tradition, under the prerequisite that guarantees cutter life, reduced tool changing and toolsetting time, guaranteed product quality, improved production efficiency.

Sectional tap of the present invention adopts ultrafine gain size, carries out the passivation polishing after cutter completes, and operating efficiency that can the Effective Raise machining internal thread when guaranteeing product quality, also reduces production costs.

Description of drawings

Fig. 1 is the structural representation of sectional tap of the present invention.

Among the figure: 1, small-angle; 2, large cone angle; 3, blade; 4, shank;

The specific embodiment

The below contrasts accompanying drawing, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present invention 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:

As shown in Figure 1, the sectional tap of the present embodiment comprises blade 3 and shank 4, and blade 3 comprises small-angle 1 and large cone angle 2.

The blade 3 of sectional tap reasonably designs the angle of small-angle 1 and large cone angle 2 by accurate Calculation, and small-angle 1 goes surplus, and large cone angle 2 guarantees thread size and precision.Reasonably distribute surplus, reduce cutting resistance, improve cutter life, reduce production costs, improved production efficiency, guaranteed product quality, the precision of size.

Claims (1)

1. novel sectional tap comprises shank and blade, it is characterized in that described blade cutting cone has the structure of two or more different cone angles, and small-angle goes the large cone angle of surplus to guarantee thread size.