CN86210893U

CN86210893U - Combined drilling and milling tool for milling and cutting taper hole

Info

Publication number: CN86210893U
Application number: CN 86210893
Authority: CN
Inventors: 刘东喜
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-29
Filing date: 1986-12-29
Publication date: 1987-12-12

Abstract

The utility model discloses a combined drilling and milling tool for milling and cutting taper hole, comprising a bit and a milling cutter which are connected by a screw. The bit is a refashion to a twist bit, and the milling cutter can be made according to the taper of the required workpiece. The hard alloy blade and the cutter body are fixedly welded by welding method, and the junction points of the blade are not in the same circumference when welding. Using this cutter to process the cast iron workpiece, the surface finish and the dimension precision can achieve the requirement of the drawing sheet, and the physical labor of the operator can be alleviated.

Description

Combined drilling and milling tool for milling and cutting taper hole

The utility model belongs to the instrument of metal cutting processing

On many machine components of machinery manufacturing industry, all have the taper hole that different taperings require.Known to the inventor, no matter be that the single-piece or the universal method of taper hole processing when producing by batch are first boring, reaming again, last fine finishining taper hole.When a collection of part of processing, constantly repeat the aforesaid operations step, operator's labour intensity strengthens, and the quality of workpiece also is difficult for guaranteeing.So this machining present situation does not change, its reason is not have a kind of suitable cutter once to finish the operation of several work steps.

Task of the present utility model is exactly the cutter that a kind of novel processing taper hole will be provided, and makes aborning to simplify the operation, and also wants to guarantee the quality of workpiece.

Task of the present utility model is finished in the following manner:

The tail end of drill bit (1) is made internal thread, milling cutter (2) cutter hub small end is made external screw thread, dependence is threaded, and drill bit and milling cutter can be made dismountable syndeton, and according to the difference of processing the aperture, can change suitable drill bit.This screw thread is advisable to make the dextrorotation closely-pitched, and end mill body is to adopt steel 45#, and taper shank is made the Morse taper shank general with machine tool accessories (3).End mill body is processed into the cone that conforms to the tapering of taper hole, and is processed into the cross sectional shape shown in the A-A section among the figure one, then carbide chip (4) is welded on the cutter hub.Longer as taper hole, desirable two or more hard alloy blade are welded on the same cutting edge.But for the rib band does not appear in the conical surface that makes workpiece, the joint location that should make two carbide alloy is not or not same garden on week.When using such cutter processing taper hole, behind the anterior bit bore, milling cutter can carry out hole milling processing continuously.

To be further elaborated with embodiment below.

According to inventor's practice, connecting thread makes M18 * 1.5 and length is that 25mm just can satisfy processing request.When needing the hole of the tapering of processing 1:7, long 70mm, then need cutter hub is made shape shown in A-A section in (Fig. 1), get the carbide chip of 8 40mm length, be welded into four cutting edges, the joint that makes two blades is not with the garden on week (Fig. 2).And open relief angle α=2 °.

Its surface smoothness of cast iron part taper hole and the dimensional accuracy that go out with above tool sharpening can reach the requirement that drawing is stipulated.

Use this tool sharpening cast iron taper hole, can simplify the operation, alleviate operator's labour intensity, guarantee product quality.

Claims

1, the brill that is useful in milling taper hole on the cast iron part mills gang tool, and this cutter is made up of a Morse taper shank (3), milling cutter (2), spiral bit (1), it is characterized in that:

The shank that the small end of a, described milling cutter (2) is shaped on external screw thread, spiral bit (1) is shaped on internal thread.

B, spiral bit (1) become gang tool with milling cutter (2) with thread connection.

2, gang tool according to claim 1 is characterized in that cutter blade (4) is welded on the cutter hub of being with tapering.

3, according to claim 1 and 2 described gang tools, it is characterized in that the material of cutter blade (4) is a carbide alloy, the material of end mill body is steel 45#.