CN201061833Y

CN201061833Y - Single slice finish-milling cutter

Info

Publication number: CN201061833Y
Application number: CNU2006200529228U
Authority: CN
Inventors: 邓剑; 汤爱民; 李树强
Original assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Current assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority date: 2006-11-24
Filing date: 2006-11-24
Publication date: 2008-05-21
Anticipated expiration: 2016-11-24

Abstract

The utility model provides an indexable single-chip fine milling cutter, comprising a cutter body, wherein an upper half portion and a lower half portion which are divided on the front end of the cutter body are inserted into the blade in the groove, and a hole and a blade through-hole which penetrate the upper half portion are screwed in the inner threaded hole of the lower half portion and are used for fastening a screw of the blade. The utility model is characterized in that the rear portion of the blade is provided with a V-shaped location structure which is matched with the groove, and the included angle between a first location face and a second location face which are formed by the V-shaped location structure is that theta is from 100 degrees to 140 degrees. The hole on the upper half portion of the cutter body and inner screw of the lower half portion have eccentric distances from 0.1mm to 0.25mm, the fastening screw is a screw is a tapered holding screw, and the cog-wheels of the hole of the upper half portion and the through-hole of the blade are evenly tapering holes which are matched with the fastening screw. The utility model has the advantages of simple structure, high location preciseness and repeated location preciseness, and simple process and low cost.

Description

Monolithic finishing milling cutter

Technical field

This patent relates to a kind of finish-milling cutter, especially is widely used in processing the high speed of various curved surfaces, sphere and approximation surface, high-precision monolithic finishing milling cutter.

Background technology

When needs high speed, high accuracy processing spherical groove, normally used is a kind of whole rose cutter, perhaps uses a kind of rose cutter that indexable precise cutter is installed, and blade inserts in the groove of cutter hub, is installed on the cutter hub by pinching screw.Chinese patent (ZL200320114212.X) discloses a kind of milling cutter with ball shaped end, groove on this cutter hub has the blade contact site, match with blade front surface wedge shape projection and blade rear surface wedge shape raised surface, the blade contact site is in the inner surface of the first half and the inner surface of Lower Half, tilt from a side tip, expand to the opposite side rear end, intersected with each other then, two " V " respect to one another shape stopper slots have been formed, and with blade before, the locating surface that the wedge shape projection of rear major face intersects to form is corresponding, clamping force by pinching screw makes groove closed and it is installed on the cutter hub, but the difficulty of processing of knife bar is bigger, the cost height; The precision of locating surface is difficult to control, and contact area is not enough, thereby influences whole clamping accuracy, and when cutting force became big, blade may be subjected to displacement; Blade can use twice, but repetitive positioning accuracy is difficult to guarantee.

The utility model content

The utility model is at above deficiency, and a kind of simple in structure, positioning accuracy and repetitive positioning accuracy height, the simple and lower-cost indexable monolithic finishing milling cutter of processing are provided.

Monolithic finishing milling cutter of the present utility model, comprise cutter hub, cutter hub front end by the separated first half of groove and a Lower Half, insert the blade in the described groove, and the internal thread hole that passes hole, the insert through hole of the first half and be screwed into Lower Half is used for the pinching screw of clamping blade, it is characterized in that: described blade rear portion has the V-type location structure that matches with groove, and there are eccentric throw in the hole of the cutter hub first half and the internal thread hole of Lower Half.

Angle theta is 100 °～140 ° between first locating surface of the V-type location structure of described blade and second locating surface, is preferably 110 °.

Described eccentric throw is 0.1mm～0.25mm, is preferably 0.2mm.

Described pinching screw is the conehead holding screw, and the hole of the first half and the chamfering of insert through hole are the taper hole that matches with pinching screw.

Owing on cutter hub and blade, adopted the V-type location structure, can prevent effectively that blade from rotating in cutter hub, and blade is in the radial force balance, simultaneously because the offset that the internal thread hole of the hole of the cutter hub first half and Lower Half exists, both made blade can be clamped in securely in the V-arrangement locating slot in the cutter hub, simultaneously axially be subjected to enough thrusts, making blade and cutter hub to be closely linked together positioning accuracy height and reliability height.

Same owing to adopted the V-type location structure, therefore so long as the blade rear portion has the V-type location division of evagination promptly can be used on the monolithic finishing milling cutter of the present utility model.Therefore simple in structure, positioning accuracy and repetitive positioning accuracy height of indexable monolithic finishing milling cutter of the present utility model, processing is simple and cost is lower.

Description of drawings

Fig. 1 is an assembling schematic diagram of the present utility model;

Fig. 2 is the main cutaway view of Fig. 1;

Fig. 3 is the front view of cutter hub 1 among Fig. 1;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the front view of first kind of form of blade 5 among Fig. 1;

Fig. 6 is the front view of second kind of form of blade 5 among Fig. 1;

Fig. 7 is the front view of the third form of blade 5 among Fig. 1.

The specific embodiment

The utility model will be further described below in conjunction with accompanying drawing.

Show that as Fig. 1-4 monolithic finishing milling cutter of the present utility model comprises cutter hub 1, cutter hub 1 front end by groove 4 separated first halves 2 and a Lower Half 3, the upper surface 12 of insertion groove 4 and the blade 5 between the lower surface 13, and pinching screw 9; Pinching screw 9 is the conehead holding screw, passes through hole 6 on the hole 10, blade of the cutter hub first half and be screwed in the internal thread hole 11 of cutter hub Lower Half to be used for clamping blade 5, and the hole 10 of the first half and the chamfering of insert through hole 6 are the taper hole that matches with pinching screw 9; Blade 5 rear portions have the V-type location division of evagination, match with the V-type locating slot that matches of groove 4 bottoms to the cutter hub indent, first locating surface 7 of V-type location division and 8 angle β of second locating surface are 100 °～140 °, corresponding with it, first locating surface 14 of V-type locating slot and 15 angle α of second locating surface are similarly 100 °～140 °, and the preferred value of α and β is 110 °.There is eccentric throw in insert through hole 6 with the hole 10 of the cutter hub first half, and its value is preferably 0.2mm for 0.1mm～0.25mm.

Owing to adopted the V-type location structure on cutter hub and blade, when blade 5 inserted in the groove of cutter hubs 1, the V-type location division of blade contacted with V-arrangement locating slot in the cutter hub, prevent that blade from rotating in cutter hub, and blade is in the radial force balance; Simultaneously because there is a very little offset in the internal thread hole 11 of the hole 10 of the cutter hub first half and Lower Half, both made holding screw 9 blade 5 can be clamped in the V-arrangement locating slot in the cutter hub, the eccentric force that produces makes the trend that the center, hole of blade aperture center and cutter hub top and the bottom is consistent, axially be subjected to enough thrusts at cutter hub, blade and cutter hub are closely linked together.Like this, blade is installed on the cutter hub, positioning accuracy height and reliability height.

Shown in Fig. 5-7, owing to adopted the V-type location structure, therefore so long as the blade rear portion has the V-type location division of evagination promptly can be used on the monolithic finishing milling cutter of the present utility model.When the blade front portion is respectively bulb, tack fillet or arc structure, but equal clamping on this cutter hub 1, be respectively applied for bulb finish-milling (Fig. 5), tack fillet vertical milling (Fig. 6), circular arc vertical milling (Fig. 7), be used for different cutting fields, reach different cutting effects.That is: stressed less when the bulb finish-milling cuts, good rigidly can effectively suppress the processing vibration, is fit to High-speed machining; Bulb finish-milling point of a knife chip space is big, and chip removal is smooth and easy, can obtain high-quality finished surface, and machined surface roughness is higher, completely abolishes polishing, polishing process; The tack corner rounding(milling) cutter has the advantage of rose cutter and tack milling cutter concurrently, solved the rose cutter blade and be 0 shortcoming in the center cutting speed, the intensity and the radiating condition of tack milling cutter sharp corner have been improved again, the circular arc vertical milling of same specification has the blade of multiple circular arc, for multiple different circular arc back chippings provide possibility, two sections curves that connect circular arc simultaneously are vertical mutually, guaranteed the position relation of chamber wall and curved surface, can not produce extra interference.

Because the design of V-type location structure, indexable monolithic finishing milling cutter of the present utility model is simple in structure, positioning accuracy and repetitive positioning accuracy height, processing is simple and cost is lower.

Claims

1. monolithic finishing milling cutter, comprise: cutter hub (1), cutter hub (1) front end is by the separated first half of groove (4) (2) and a Lower Half (3), insert the blade (5) between described groove (4) upper surface (12) and the lower surface (13), and the hole (10) of passing the first half, insert through hole (6) and the internal thread hole (11) that is screwed into Lower Half are used for the pinching screw (9) of clamping blade (5), it is characterized in that: described blade (5) rear portion have with groove (4) bottom to the evagination V-type location division that the V-type locating slot of cutter hub indent matches, there is eccentric throw in the hole of the cutter hub first half (10) with the internal thread hole (11) of Lower Half.

2. monolithic finishing milling cutter as claimed in claim 1 is characterized in that: between first locating surface (7) of described V-type location division and second locating surface (8) between first locating surface (14) of angle β and V-type locating slot and second locating surface (15) angle α be 100 °～140 °.

3. monolithic finishing milling cutter as claimed in claim 2 is characterized in that: described angle α and β are 110 °.

4. monolithic finishing milling cutter as claimed in claim 1 is characterized in that: described eccentric throw is 0.1mm～0.25mm.

5. monolithic finishing milling cutter as claimed in claim 4 is characterized in that: described eccentric throw is 0.2mm.

6. monolithic finishing milling cutter as claimed in claim 1 is characterized in that: described pinching screw (9) is the conehead holding screw, and the chamfering of the hole of the described first half (10) and insert through hole (6) is the taper hole that matches with pinching screw (9).