CN201371266Y

CN201371266Y - Counter bore backsinking cutter

Info

Publication number: CN201371266Y
Application number: CN200920301858U
Authority: CN
Inventors: 路亚光
Original assignee: CSR Qishuyan Co Ltd
Current assignee: CRRC Qishuyan Co Ltd
Priority date: 2009-04-02
Filing date: 2009-04-02
Publication date: 2009-12-30
Anticipated expiration: 2019-04-02

Abstract

The utility model relates to a counter bore backsinking cutter, comprising a cutter handle and a cutter rod, wherein the bottom part of the cutter handle is provided with an axial blind hole which is internally provided with a fast spring clamp head; the upper part of the cutter rod is a clamping part, the middle part thereof is a positioning part and the lower part thereof is a cutter head; the clamping part of the cutter rod is inserted into the fast spring clamping head of the cutter handle so as to lead the cutter handle and the cutter rod to form detachable connection; and the cutter head is provided with two to four cutting pieces which are detachably connected on the cutter head with the upward cutting edge. In the counter bore backsinking cutter, the cutter rod is a whole body, has good strength, is not easy to be broken and applicable to occasions which have small backsinking bore diameter and only can carry out processing from the front surface. The cutter has low use cost and simple and practical operation, not only can ensure the backsinking bore quality, but also can greatly improve the backsinking processing efficiency. When the cutter rod and the processed bore matching surface has higher requirements, a plurality of slots can be properly arranged on the positioning parts of the cutter rod, thus reducing contact surfaces, being convenient to lubricate the cutter rod and reducing the wearing and seizure of the cutter rod.

Description

The anti-countersink tool of counterbore

Technical field

The utility model relates to the anti-countersink tool of counterbore.

Background technology

Bolt mounting holes on the part is owing to this body structure and use reason, often is designed to the form of back side counterbore.Anti-ream processing can only be adopted in the position less for bolt mounting holes, that the hole is long and counterbore can't carry out positive processing deeply again.Because anti-spot-facing position mostly is irregular, special workpiece is a steel-casting and again under the darker situation of anti-spot-facing, and is higher to the requirement of strength of cutter.Anti-countersink tool at present commonly used mainly contains blade rotating centrifugal on blade inserting, knife bar bottom sleeve type and the knife bar of perforate on the knife bar of the location formula of dishing out.In the face of the little and long position of anti-spot-facing, if use the cutter of these structures, owing to be subjected to the restriction of this body structure, the cutter strength and stiffness are very poor, are difficult to cutting, and cutter very easily fractures, and production efficiency is very low.

The utility model content

The purpose of this utility model is to propose a kind of intensity height, can conveniently carries out the anti-countersink tool of counterbore of anti-ream processing.

For achieving the above object, the utility model is taked following technical scheme:

The anti-countersink tool of a kind of counterbore, comprise handle of a knife and knife bar, the bottom of described handle of a knife is provided with axial blind hole, be provided with the rapid spring chuck in the blind hole, the top of knife bar is that retained part, middle part are that localization part, bottom are cutter heads, make between handle of a knife and the knife bar in the rapid spring chuck of the retained part insertion handle of a knife of knife bar and form releasable connection, cutter head is provided with 2～4 cutting tips, and cutting tip makes progress releasable connection on cutter head with blade.

The localization part outer surface of described knife bar is provided with circumferential slot.

The utlity model has following good effect: knife bar of the present utility model is an integral body, and intensity is good, and knife bar is frangibility not, is fit to the occasion that anti-spot-facing footpath is little and can only carry out anti-ream processing from the front.The cutter use cost is low, and practicality simple to operate can be guaranteed anti-spot-facing quality, can improve anti-ream working (machining) efficiency greatly again.When knife bar when the machining hole mating surface has been had relatively high expectations, can on the localization part of knife bar, suitably open several grooves, reduce contact-making surface and be convenient to lubricated knife bar, reduce the knife bar wearing and tearing and kill.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein

Fig. 1 is a structure chart of the present utility model;

Fig. 2 is the knife bar diagrammatic sketch;

Fig. 3 prepares diagrammatic sketch before the utility model uses;

Fig. 4 is a diagrammatic sketch during the utility model uses.

The specific embodiment

Embodiment 1

Fig. 1 and embodiment shown in Figure 2 comprise handle of a knife 1 and knife bar 2.The bottom of described handle of a knife 1 is provided with axial blind hole 1-1, be provided with rapid spring chuck 3 in the blind hole 1-1, the top of knife bar 2 is that retained part 2-1, middle part are that localization part 2-2, bottom are cutter head 2-3, make between handle of a knife 1 and the knife bar 2 in the rapid spring chuck 3 of the retained part 2-1 insertion handle of a knife 1 of knife bar 2 and form releasable connection, cutter head 2-3 is provided with 2～4 cutting tips 4, knife number is decided on anti-spot-facing diameter, and cutting tip 4 makes progress releasable connection on cutter head 2-3 with blade.The localization part 2-2 outer surface of described knife bar 2 is provided with circumferential slot 2-2-1.

See Fig. 3 and Fig. 4, earlier knife bar 2 is penetrated machining hole 5-1 from the reverse side of workpiece to be machined 5 during operation in, after will by rapid spring chuck 3 anti-countersink bar 2 be clamped with the handle of a knife 1 that lathe connects, can carry out the anti-ream of counterbore and process.

Claims

1, the anti-countersink tool of a kind of counterbore, comprise handle of a knife (1) and knife bar (2), it is characterized in that: the bottom of described handle of a knife (1) is provided with axial blind hole (1-1), be provided with rapid spring chuck (3) in the blind hole (1-1), the top of knife bar (2) is retained part (2-1), the middle part is localization part (2-2), the bottom is cutter head (2-3), make between handle of a knife (1) and the knife bar (2) in the rapid spring chuck (3) of retained part (2-1) the insertion handle of a knife (1) of knife bar (2) and form releasable connection, cutter head (2-3) is provided with 2～4 cutting tips (4), and cutting tip (4) makes progress releasable connection on cutter head (2-3) with blade.

2, the anti-countersink tool of counterbore according to claim 1 is characterized in that: localization part (2-2) outer surface of described knife bar (2) is provided with circumferential slot (2-2-1).