CN201471023U

CN201471023U - Screw-tap threaded guide sleeve

Info

Publication number: CN201471023U
Application number: CN200920234461XU
Authority: CN
Inventors: 朱兆喜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-17
Filing date: 2009-08-17
Publication date: 2010-05-19
Anticipated expiration: 2019-08-17

Abstract

The utility model discloses a screw-tap threaded guide sleeve and relates to a machining tool, comprising a columnar sleeve body, and internal thread holes which are arranged along an axial direction of the sleeve body and have equal diameters. When being machined, the product can be made into a sleeve body by adopting high-strength materials, and the internal thread holes with high accuracy are machined in the sleeve body. When in tapping, the sleeve body is concentrically fixed at the upper end of a machined part to lead the axis of a bottom hole of the machined part, the axis of the internal thread holes on the sleeve body and the axis of a screw tap to be on a same axis, thus guaranteeing the verticality of the machined part; and therefore, even though a Z35 vertical drill with the cost less than the machining center by 500 times is used, the deviation of 0.15mm in every 100mm verticality of the machined thread holes can be improved to be within 0.8mm, thus effectively improving the quality of the machined part and simultaneously greatly reducing the investment of the manufacturing cost.

Description

A kind of screw tap screw thread guide pin bushing

Technical field

The utility model relates to a kind of machine tools.

Background technology

Tapping is to utilize screw tap to process the process of internal thread on the workpiece of accomplishing fluently bottom outlet, screw tap be processing various in, the cutter of small size internal thread, existing screw tap is one section screw tap bar that has the tapping age of a draught animal.The scope of application with the screw tap tapping is very wide, and it is mainly used in aspects such as engine manufacturing, plant equipment manufacturing and space equipment manufacturing.

For the manufacturing of engine link and cylinder block, the screw thread perpendicularity of processing with screw tap is an extremely important project.According to the Technology Need of connecting rod screw and cylinder block base bearing screw, technical standard order in the past is that per 100 millimeters of vertical degree deviations should be in 0.1 millimeter.

Yet owing to use the particularity of the working angles of screw tap machining screw, China can't reach above-mentioned technical standard in the testing result of this project always.In actual production process, the machining deviation of conventional equipment is common more than 0.2 millimeter.Use the best machining center tapping of processing effect, after technological improvement, can only reach the effect of 0.15-0.1 millimeter.The manufacturer that has helplessly have to change check criteria into 0.15 millimeter.This situation has greatly influenced security of products and durability, has influenced the raising of the level of China's machine-building.Restricted the competitiveness that China engineering goods are manufactured on the international market.

The utility model content

The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of screw tap screw thread guide pin bushing that improves the screw thread perpendicularity precision of screw tap processing to be provided.

The purpose of this utility model is achieved in that a kind of screw tap screw thread guide pin bushing, comprises the cylindricality body, of body isometrical internal thread hole is set axially.

When processing the utility model product, can adopt the high material of intensity to make body, the high internal thread hole of machining accuracy in body.When tapping, body is fixed on one heart the upper end of workpiece, make the axis of the axis of internal thread hole on the axis, body of workpiece bottom outlet and screw tap on same axis, thereby guaranteed the perpendicularity of workpiece internal thread, like this, even use cost to be lower than the Z35 vertical drill of 500 times of machining centers, also the deviation of 0.15 millimeter of the per 100 millimeters perpendicularity of institute's processing screw hole can be brought up in 0.08 millimeter, thereby improved the quality of workpiece effectively, also greatly reduced the input of manufacturing cost simultaneously.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is a kind of A-A sectional drawing among Fig. 1.

Fig. 3 is an another kind of A-A sectional drawing among Fig. 1.。

Fig. 4 is the reference figure of the utility model use occasion.

Among the figure, 1 body, 2 screw taps, 3 workpieces, 4 internal thread holes.

The specific embodiment

As shown in Figure 1,, comprise cylindricality body 1, isometrical internal thread hole 4 axially is set of body 1 for a kind of screw tap screw thread guide pin bushing.

As shown in Figure 2, the profile of body 1 is circular.

As shown in Figure 3, the profile of body 1 is a pentagon, perhaps is other shape.

As shown in Figure 4, body 1 is fixed on the upper end of workpiece 3, and the aperture of the internal diameter of body 1 and workpiece 3 is suitable, and during tapping, the axis of the axis of workpiece 3 bottom outlets, the axis of screw tap 2 and internal thread hole 4 is on same axis.

Claims

1. screw tap screw thread guide pin bushing is characterized in that: comprise the cylindricality body, of body isometrical internal thread hole is set axially.