CN2810845Y - Hard alloy spiral bevel gear milling cutter - Google Patents

Abstract

The utility model relates to a hard metal arc-tooth bevel gear milling cutter, wherein each piece of milling-cutter disk is distributed with 24 cutter-tooth grooves, 3 cutter-tooth grooves form a group, and an inner tooth or an outer tooth of a hard tooth surface arc milling-cutter is respectively inserted in each group; plug blocks are inserted in the other 2 cutter-tooth grooves to eliminate stress generated when the milling-cutter works; each piece of the milling cutter is composed of 8 hard tooth surface arc milling cutter teeth and 16 plug blocks which are all tightly fastened in screw holes tilting at 10 DEG by screws. Due to the adoption of a structure of a spiral tooth bevel gear milling-cutter disk for the hard tooth surface arc milling-cutter disk, the outer diameter and the thickness are enlarged, and the rigidity of a cutter body is increased; because a structure of a welding alloy cutter blade is adopted for the hard tooth surface arc milling cutter teeth and is the same with the structure of the spiral tooth bevel gear milling-cutter, a cutter tooth body is simple and is easy to manufacture. The hard tooth surface arc milling cutter which belongs to the machining tool for spiral bevel gears is widely used in the industry of traffic transportation, power generating equipment, mine machinery, steel rolling equipment, etc.

Description

Carbide zerol gear cutter

Affiliated field: the utility model relates to a kind of carbide zerol gear cutter

Background technology: be when carbide zerol gear cutter adds work gear as the gear teeth that produce the shape wheel with milling cutter, milling cutter cutting movement track is regarded generating surface as, utilize processed gear and the conjugate movement of producing the shape wheel, form the flank of tooth of processed gear by generating surface, this point is the same with high-speed steel arc milling cutter process principle, but carbide zerol gear cutter processing to as if quenching hard gear, general hardness is at HRC60 ° of high-speed steel facing cutter.But consider that in design welding blade easily misplaces, so the woollen size design of alloy blade is excessive, the difficulty when having increased grinding adopts carborundum correction skive, and efficient is low, and grinding wheel froth is many, influences surrounding environment, is unfavorable for processing.

Summary of the invention: big in order to solve the distortion of quenching rear screw awl tooth, the low waste product of gear lapping efficient is many, the utility model provides a kind of scraping for the hard flank of tooth arc milling cutter that grinds high efficiency, the purpose of this utility model realizes by following architectural feature, the utility model is a kind of hard flank of tooth arc milling cutter, every uniform 24 cutter tooth grooves of end mill body, wherein be bumped into hard flank of tooth milling cutter cutter tooth in 8 cutter tooth grooves, be bumped into the chock that the general tool steel is done in 16 cutter tooth grooves, each hard flank of tooth milling cutter and chock all be by tilt 10 ° screw with screw fastening, make it steadily firm.The utility model carbide zerol gear cutter is in order to guarantee to process hard flank of tooth curved tooth spiral bevel gear and the hyperboloid spiral bevel gear that quenching hardness reaches SS-60HRC, obtain simultaneously replacing grinding with scraping, reduce production costs, the conjugate tooth profiles of a pair of gear are guaranteed in the tooth depth direction.The hard flank of tooth arc of the utility model milling cutter adopts axially and radially two negative rake by changing milling cutter construction and assembling form, especially carbide chip cutting angle, increases the impact resistance of carbide chip.The beneficial effect of the hard flank of tooth gear with curved teeth of the utility model milling cutter is: alloy blade and cutter tooth body on the hard flank of tooth gear with curved teeth milling cutter cutter tooth are taked the low-temperature silver solder technology, and the cutter tooth body adopts high-speed steel to make, to reduce the influence of cutter tooth cutting ability.Carbide alloy scraping cutterhead blade carries out relief grinding not by the cutter spindle line by making the same processing method of high-speed steel arc milling cutter.So outside on the cutting blade, be convex curve in theory, and gear teeth tips and tooth root place that the result causes outer cutter to cut out produce " cross and cut ", and gear teeth tips that interior cutter cuts out and tooth root place produce " owing to cut ", during a pair of gears engaged of this " cross cut " and " owing to cut ", can obtain each other mending and appreciate.The utility model adopts 12 ° at the oblique angle of helical tooth conical gear hob hard surface skiving milling cutter substantially--13 ° of tops and tooth root appearance error, for 18 "; 21 " the general Δ r of cutterhead 0.02-0.03mm, therefore after replacing with linear cutting edge, guaranteed tooth depth direction contact zone height, improve the gears engaged precision, by adopting its hardness of helical tooth conical gear hob new construction facing cutter to reach HRC58-60, rigidity is good, adopts the taper hole location simultaneously, large end face contact positioning accuracy height, cutting is stable, and it is constant to load and unload precision repeatedly, the screw that the fastening employing inclination of cutter tooth and cutter hub is 10 °, tight cutter is that cutter tooth inwardly produces and downward two component, upwards be not with cutter, fastening firm, micrometer adjusting screw is placed on cutter tooth groove center, wedge moves up and down during toolsetting, keep balance, stable, accurately, toolsetting is rapid, grinds the distortion that brings after correction is quenched to scrape band, boosts productivity, keep gear to have comparatively ideal contact zone, unload the cutter employing and unload the cutter cap, convenient rapidly, improve service life.The hard flank of tooth arc of the utility model milling cutter has more structure rationalization, scientific, general hard flank of tooth curved tooth in the back of quenching and the hypoid Machining Spiral Bevel Gear instrument of belonging to, this series gear is widely used in the industries such as communications and transportation, generating equipment, mining machinery, bundle steel equipment, and leads over important national economy field.This cutter replaces gear lapping with hard surface skiving, grinds to scrape band, not only enhances productivity, and significantly reduces the waste product that gear lapping brings.Scrape with hard flank of tooth arc milling cutter essence and to have guaranteed qualified contact zone, reach twice laid, save steel and production cycle, bring good society to society.The rigidity of carbide zerol gear cutter dish is good, and cutter tooth adopts carbide chip, and cutting angle adopts axially and radially two negative rake, increases the carbide-tipped milling cutter impact resistance.

Description of drawings:

Fig. 1 inlays the front view that two-sided essence after the assembling is cut hard flank of tooth curved tooth cutter for the utility model

Fig. 2 is the cutaway view of Fig. 1

Fig. 3, Fig. 9 are the outer cutter tooth and the interior cutter tooth of the utility model milling cutter

Fig. 4, Figure 10 are outer cutter tooth and interior cutter tooth radial edge inclination angle part section

Fig. 5, Figure 11 are the cutaway view of Fig. 3, Fig. 9

Fig. 6, Figure 12 are the vertical view of Fig. 3, Fig. 9

Fig. 7, Figure 13 are the axial cutting edge inclination part section of outer cutter tooth and interior cutter tooth

Fig. 8, Figure 14 are the partial structurtes figure of Fig. 5, Figure 11

Specific embodiments:

Wherein: part 1 is that milling cutter diskware 2 is outer cutter tooth

Part 3 is that outer cutter spacer elements 4 is chock

Part 5 is that interior cutter spacer elements 6 is interior cutter tooth

Part 7 is for adjusting wedge spare 8 micrometer adjusting screws

Part 9 tight cutter screw element 10 sign split pins

Part 11 gland screw spares 12 unload the cutter cap

Part 13 unloads the cutter jackscrew

Cutting hard flank of tooth curved tooth cutter with two-sided essence is example: as Fig. 1, the utility model shown in Fig. 2 is a kind of carbide zerol gear cutter, every uniform 24 cutter tooth grooves of facing cutter, 3 cutter tooth grooves are one group, every group is bumped into cutter tooth 6 and outer cutter tooth 2 in the hard flank of tooth arc milling cutter respectively, other 2 cutter tooth grooves are bumped into chock 4, every milling cutter is made up of 8 hard flank of tooth arc milling cutter cutters tooth and 16 chocks, by cutter tooth 6 in facing cutter 1 uniform 24 cutter tooth grooves are bumped into respectively among the 10 ° of figure that tilt, outer cutter tooth 2, adjust wedge 7, outer pad 3, internal gasket 5, micrometer adjusting screw 8, chock 4 parts such as grade, fastening by the 10 ° of screws that tilt with screw 9, forming milling cutter thus replaces grinding with scraping, the above spiral bevel gear of hardness HRC55-62 after processing is quenched, precision reaches more than 7 grades.

The technical scheme in the invention for solving the technical problem is: design 18 "; 21 " hard flank of tooth curved tooth cuttves, regard milling cutter as generating surface as the gear milling cutter cutting edge movement locus that produces the shape wheel, utilize processed gear and the conjugate movement of producing shape theory, form the flank of tooth of processed gear by generating surface, but hard flank of tooth arc milling cutter processing object is a quenching hard gear, generally more than HRC60, so its structure, as Fig. 6, shown in Figure 12, make milling cutter material and cutting angle etc. be different from the high-speed steel facing cutter, hard flank of tooth facing cutter rigidity will be got well, cutter tooth body (Fig. 3, part 1 among Fig. 9) employing carbide chip (Fig. 3, part 2 among Fig. 9), as Fig. 5, shown in Figure 11, adopt axially and radially two negative rake at the cutting angle, increases carbide alloy cutter tooth impact resistance.According to facts have proved the inclined cutting that increases cutting edge inclination, it is the key factor that the scraping cutter is obtained application, as Fig. 7, shown in Figure 13, this utility model has adopted 12 ° at the oblique angle of helical tooth conical gear hob hard surface skiving milling cutter--13 ° from, keep rectilinear edge in midpoint, tooth top and tooth root error are controlled in the minimum zone when intersecting with theoretical conic section.The facing cutter structure Design adopts helical tooth conical gear hob cutter head structure substantially, dilated diameter and thickness, increase the cutter hub rigidity, for when cutting in a cutter tooth groove, a cutter tooth is participated in cutting, the soft flank of tooth cutter tooth of hard flank of tooth cutter tooth gear ratio reduces 2/3rds, and the vibration that has caused when having avoided cutting component to disperse produces ripple.Influence the surface quality of the flank of tooth.The single face essence of the utility model milling cutter (comprising the inside and outside milling cutter tooth of cutting) is as adopting different salient angle α among Fig. 8, Figure 14.Value and the long l of salient angle.Value guarantees that spiral bevel gear that milling cutter the processes district that is meshed does not produce interference, reduces the gears engaged noise, adopted low-temperature silver solder alloy blade structure, the cutter tooth body is simple, easily processing, by the adjustment of high-precision spade milling machine tool, guaranteed the straight purpose of smooth surface bus.

Claims (3)

1, a kind of carbide zerol gear cutter, it is characterized in that: every uniform 24 cutter tooth grooves of facing cutter, 3 cutter tooth grooves are one group, every group is bumped into cutter tooth (6) and outer cutter tooth (2) in the hard flank of tooth arc milling cutter respectively, other 2 cutter tooth grooves are bumped into chock (4), every milling cutter is made up of 8 hard flank of tooth arc milling cutter cutters tooth and 16 chocks, and 10 ° of screws are fastening by tilting.

2, according to the carbide zerol gear cutter described in the claim 1, it is characterized in that: hard flank of tooth arc facing cutter adopts the soft cutting knife dish of helical tooth conical gear hob structure, strengthen outer warp and thickness, adopt accurate closely-pitched micrometer adjusting screw hole and design in the middle of the cutter groove, two standard straight troughs are arranged on two-sided Hardac, their bottom surface is parallel to the milling cutter axis, fastening cutter tooth center line of bolt hole and end face are angled, have cannelure around the big end of cutter hub taper hole, milling cutter is installed on the main shaft, taper hole produces strain cutter hub end face and closely contacts with main shaft, on the cutter hub with two jackscrews with unload cutter cap one and reinstate.

3, according to the carbide zerol gear cutter described in the claim 1, it is characterized in that: hard flank of tooth arc milling cutter cutter tooth has adopted axially and radially two negative rake.

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