CN202845951U

CN202845951U - Tool for machining hole bottom reverse chamfering

Info

Publication number: CN202845951U
Application number: CN 201220508086
Authority: CN
Inventors: 徐忠兰; 黄华栋; 顾晋; 滕琦; 李春雷
Original assignee: Suzhou Vocational Institute of Industrial Technology
Current assignee: Suzhou Vocational Institute of Industrial Technology
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2013-04-03
Anticipated expiration: 2022-09-27

Abstract

The utility model provides a tool for machining a hole bottom reverse chamfering. The tool for machiningthe hole bottom reverse chamfering comprises a tool handle, a tool bar, a cutting head, an eccentric bushing which is sleeved with an outer side of the tool handle and a hard alloy blade which is connected with the cutting head in an integrated mode, wherein the tool handle, the tool bar and the cutting head are connected in an integrated mode. The tool handle, the tool bar, and the cutting head synchronously rotate with zero eccentricity. An adjustable eccentricity e is placed between the cutting head and the eccentric bushing to meet the formula, wherein D is a diameter of an inner hole of the reverse chamfering, d is a diameter of the cutting head with the alloy blade, h is the height of the reverse chamfering, and alpha is an angle degree of the reverse chamfering. The tool for machining the hole bottom reverse chamfering can design various eccentric bushings of the eccentricity e according to size of a bore diameter of an inner hole of a work piece. By the adoption of eccentricity and NC program control, the reverse chamfering with various bore diameters can be effectively processed in high-precision in computerized numerical control (CNC).

Description

Be used at the bottom of the machining hole the instead cutter at angle

Technical field

The utility model relates to a kind of metal-cutting machine tool, relates in particular to a kind of for the cutting element at angle instead at the bottom of the processing metal workpiece hole.

Background technology

In the metal works processing of routine, the positive surface chamfer of processing endoporus is eaily, can at lathe with the rose reamer with angle, also can free-handly scrape with scraper.But instead with regard to difficulty how the angle for the processing endoporus.To processing parts endoporus angle instead, scrape by manual scraper traditionally, or with hardware Special chamfering device chamfering.So not only efficient is low, and scratches workpiece easily.As shown in Figure 1, it is a kind of structure cutaway view of workpiece to be processed, workpiece 1 has upper and lower two endoporus 11, endoporus 12 penetrating with inner chamber in the diagram, particularly internally hole end surface and workpiece lumen muscle span from L very close to, when chamfering 111,112 is had relatively high expectations, hardware Special chamfering device can't stretch, and scraper can't go deep into.Especially when the hole was darker, cutter intensity was difficult to be guaranteed.

Summary of the invention

The utility model discloses at the bottom of a kind of high strength eccentric sleeve type carbide alloy hole instead angle cutter, all to need reverse chamfering for some precision component endoporus, particularly to the angle of chamfering, when the degree of depth has higher requirements, also can solve some parts and need the end face of chamfering and interior muscle span angle processing problems instead under the state close to very.

The utility model realizes that the technical solution of above-mentioned purpose is: a kind of for the cutter at angle instead at the bottom of the machining hole, it is characterized in that, described cutter comprises handle of a knife, knife bar, the cutting head that one links to each other, and the eccentric bushing that is socketed on the handle of a knife outside, the carbide chip that links to each other with the cutting head one, described handle of a knife, knife bar and cutting head zero is eccentric, has the eccentric e of tool adjustability between described cutting head and the eccentric bushing, satisfies

, wherein D is the diameter of angle endoporus instead, and d is the diameter at cutting headband alloy blade blade place, and h is that the height, α at instead angle is the angle at angle instead.

Further, described eccentric bushing comprises that extent of the error is between the M of 1.5～5mm type eccentric bushing and the extent of the error N-type eccentric bushing between 5～17mm.

Further, described knife bar is that section is the olivary hardened steel body of rod.

Further, described eccentric bushing is provided with the trepanning of the eccentric e of tool, and described handle of a knife and trepanning are slippery, and handle of a knife is fastened in the trepanning by the flat head screw that penetrates eccentric bushing.

Further, described eccentric bushing is provided with the position groove towards the one side of cutting head.

After using technical solutions of the utility model, its significant technique effect is presented as: this cutter can be according to the pore size of inner hole of workpiece, design the eccentric bushing of different eccentric e, utilize eccentric and NC programme-control, can be on CNC the instead angle of high accuracy, efficient automatically processing different pore size, promoted flexibility, the precision of metal cutting machining tool under the special applications.

Following constipation closes the embodiment accompanying drawing, the specific embodiment of the present utility model is described in further detail, so that technical solutions of the utility model are easier to understand, grasp.

Description of drawings

Fig. 1 is a kind of structure cutaway view of workpiece to be processed.

Fig. 2 is the integral structure schematic diagram of the utility model handle of a knife, knife bar, cutting head.

Fig. 3 is the structural representation of the utility model M type eccentric bushing.

Fig. 4 is the structural representation of the utility model N-type eccentric bushing.

Fig. 5 is the instead working state schematic representation at angle of the utility model tool sharpening.

The specific embodiment

The utility model discloses at the bottom of a kind of high strength eccentric sleeve type carbide alloy hole instead angle cutter, all to need reverse chamfering for some precision component endoporus, particularly to the angle of chamfering, when the degree of depth has higher requirements, also can solve end face that some parts needs chamfering and interior muscle span reverse chamfering under the state close to very.

To shown in Figure 4, this kind is used at the bottom of the machining hole the instead cutter at angle, handle of a knife 21, knife bar 22, cutting head 23 that one links to each other, and the eccentric bushing that is socketed on the handle of a knife outside, the carbide chip 24 that links to each other with cutting head 23 one such as Fig. 2.Wherein this handle of a knife 21, knife bar 22 and cutting head 23 0 are eccentric, and have the eccentric e of tool adjustability between cutting head 23 and the eccentric bushing, satisfy

, wherein D is the diameter of angle endoporus instead, and d is the diameter at cutting headband alloy blade blade place, and h is that the height, α at instead angle is the angle at angle instead.When having no special requirements, but formula of reduction calculates:

The cutter hub that is formed by handle of a knife, knife bar, the cutting head HRC50 that need quench, eccentric bushing quenching HRC48.The carbide chip soldering is on cutting head, and firm welding must not have crackle, and the material of carbide alloy is selected according to part to be processed, such as YG6X, YL10.2, YT14 etc.According to the difference in size of eccentricity values, eccentric bushing is divided into extent of the error between the M of 1.5～5mm type eccentric bushing (as shown in Figure 3) and the extent of the error N-type eccentric bushing (as shown in Figure 4) between 5～17mm.As seen shown in Figure 3, this M type eccentric bushing 31 has eccentric trepanning 311, and penetrates eccentric bushing and be provided with perforation.As seen shown in Figure 4, this N-type eccentric bushing 32 has eccentric trepanning 321, and penetrates eccentric bushing and be provided with perforation.Handle of a knife and trepanning are slippery, and handle of a knife is fastened in the trepanning by the flat head screw that penetrates eccentric bushing, and above-mentioned perforation is used for the flat head screw cross-under and compresses the locking handle of a knife.Need to prove that the eccentric e of above-mentioned what is called refers to the range deviation of the center line of machining center spindle centerline and the set trepanning of eccentric bushing, and zero eccentric between the center line of trepanning and the cutter hub.

Especially, above-mentioned knife bar 22 is the olivary hardened steel body of rod for section.The length of knife bar should slightly be longer than the instead degree of depth of angle endoporus, and its section is olive-shaped.The olive shape section is intersected by two identical circular arcs and forms, and its radius outline is less than the radius at cutting headband alloy blade blade place.

The utility model cutter is when work: at first need programming to set the rotation of CNC main shaft is fixed on an ad-hoc location all the time when stopping.Then select suitable eccentric bushing according to the specification at the instead angle of the diameter of endoporus and required processing.And handle of a knife is installed in the trepanning of eccentric bushing, require carbide bit to be parallel to the set position groove 312,322 of eccentric bushing end face, blade is on short position groove direction.The common wide 0.2mm of this position groove, dark 0.1mm, and coating Red.The hexagonal flat head screw locks handle of a knife in trepanning in adopting after proofreading and correct.Then eccentric bushing is installed in the CNC main shaft, stretches in the endoporus of workpiece to be processed and adjust the position, start main shaft, feed also promotes cutter by the hole depth direction, utilize eccentric e instead the angle to required specification.By adjusting the tool position, can in the situation of not destroying bore area, cutter be withdrawed from last, finish once the instead processing at angle.

The utility model is the knife bar that adopts the olive shape section, utilize the hard alloy cutter of eccentric bushing structure, by the NC programme-control, can work in-process the heart (boring machine, vertical milling also can) easily, correct angle instead, even working range is narrow or endoporus is darker, all can work, suit at ￠ 12-￠ 42 endoporus scopes angle instead, if change eccentric distance e and the cutting head relative dimensions of eccentric bushing, also can process the instead angle in other aperture.

The utility model can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1. be used at the bottom of the machining hole the instead cutter at angle, it is characterized in that, described cutter comprises handle of a knife, knife bar, the cutting head that one links to each other, and the eccentric bushing that is socketed on the handle of a knife outside, the carbide chip that links to each other with the cutting head one, there is the eccentric e of tool adjustability in described handle of a knife, knife bar and cutting head zero eccentric synchronous the rotation between described cutting head and the eccentric bushing, satisfy , wherein D is the diameter of angle endoporus instead, and d is the diameter at cutting headband alloy blade blade place, and h is that the height, α at instead angle is the angle at angle instead.

2. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing comprises that extent of the error is between the M of 1.5～5mm type eccentric bushing and the extent of the error N-type eccentric bushing between 5～17mm.

3. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described knife bar is that section is the olivary hardened steel body of rod.

4. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing is provided with the trepanning of the eccentric e of tool, and described handle of a knife and trepanning are slippery, and handle of a knife is fastened in the trepanning by the flat head screw that penetrates eccentric bushing.

5. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing is provided with the position groove towards the one side of cutting head.