CN100507316C - Point line meshed gear and its tooth grinding method - Google Patents

Abstract

The present invention relates to a point-line meshed gear and a processing method of grinding teeth of the meshed gear. The surface roughness Ra of the concave tooth profile part of a big gear (1) of The invention relates to a point-line meshed gear and relative teeth milling process. Wherein, the surface coarseness Ra of concave tooth of big gear (1) is between 0.4-1.6mum; and it has the advantagthe gear of the present invention is between 0.4 mum and 1.6 mum. The present invention has the advantages that the gear can not abrade the tooth surface of a pinion gear (2) when the gear generates res that: 1, the gear will not abrade the teeth surface of small gear (2) when the gears generate relative slide, to improve the bearing capacity and reduce the working noise; 2, it can confirm the adselative slide after absorbing load, the bearing capacity of the gear is improved, and the work noise is reduced; the present invention ensures the adsorption of the gear to lubricant so as to form liqorption between the gear and the lubricant to form liquid lubrication. And the bearing capacity of said gear is improved 30-50% than common rigid teeth involute gear, with 5-10db (A) reduced noise, whuid lubrication. Compared with a common hard tooth surface involute gear, the point-line meshed gear of the present invention has the advantages that the bearing capacity is improved by 30 to 50%, andile with the increase of load, the noise can be reduced 2-3db (A). The invention has simple operation and the application for milling the whole concave teeth of gear. the noise is reduced by 5 to 10 db (A); in addition, with the increase of load, the noise can be reduced by 2 to 3 db (A). The present invention has simple operation and application for milling the whole concave tooth profile part of the gear.

Description

A kind of point-line meshing gear and roll flute processing method thereof

Technical field

The present invention relates to gear and preparation method thereof, be specifically related to point-line meshing gear and preparation method thereof, particularly the roll flute processing method in point-line meshing gear and preparation method thereof.

Background technique

The retarder of present industrial application, major part is involute tooth wheel decelerator and circular-arc gear decelerator.Wherein, the involute tooth wheel decelerator is in order to improve bearing capacity, and involute gear uses the hard flank of tooth of high-quality steel for carburizing carburizing and quenching usually, and in order to improve flank of tooth surface roughness and grade of accuracy, the involute working flank must adopt roll flute processing.

Existing involute gear, the surface roughness Ra of its recessed flank profil part bottom be all greater than 25 μ m, this be because: 1, the restriction of roll flute processing method; Because behind the carburizing and quenching, the surface roughness Ra of recessed flank profil〉25 μ m, existing roll flute processing method can only partly be carried out grinding to the involute on recessed flank profil top, and for recessed flank profil part bottom (curved portion that the both sides involute connects), because its curve ratio is less, drawing effect is arranged after the grinding, thereby reduce the flexural strength of gear, can not grinding.2, recessed flank profil is a non-working surface, and surface roughness is bigger, does not influence working state.

But the surface roughness of recessed flank profil part bottom is excessive, can cause some point-line meshing gears to have a strong impact on.The paper " involute Point Engaging Gear Transmission " of " Wuhan Water Transporting Engineering College journal " the 2nd phase in 1986 (the 10th volume), a kind of involute point-line meshing gear is disclosed, as shown in Figure 1, it comprises the gearwheel 1 and the small gear 2 of pair of meshing, when the surface roughness Ra of gearwheel 1 in recessed flank profil part bottom〉during 25 μ m, behind the two gear stands under load slide relative can take place, cause the flank of tooth scratch of small gear 2, cause bearing capacity to reduce, it is big that operational noise becomes.

Summary of the invention

Technical problem to be solved by this invention is: a kind of point-line meshing gear and roll flute processing method thereof are provided, and the bearing capacity height of this gear, operational noise is little; Its roll flute processing method can partly be carried out grinding to whole recessed flank profil.

The present invention solves the problems of the technologies described above the technological scheme that is adopted:

A kind of point-line meshing gear, it comprises the gearwheel and the small gear of pair of meshing, the surface roughness Ra of the recessed flank profil part of gearwheel is between 0.4-1.6 μ m.

A kind of point-line meshing gear roll flute processing method, it comprises the roll flute process step of gearwheel, the steps include:

(1), the blank of gearwheel is contained on the axle, proofread and correct gear ring radially with end face run-out, then with the central plane of emery wheel helix plane perpendicular to the tooth of gearwheel;

(2), the emery wheel of rotation is to the tooth root feed of gearwheel and pump, the while gearwheel is made rolling movement around axle;

(3), recessed flank profil is ground to required size, and the surface roughness Ra that makes recessed flank profil part between 0.4-1.6 μ m.

Above-mentioned emery wheel is a tapered wheel.

Gear of the present invention, the surface roughness Ra of the recessed flank profil part of its gearwheel is between 0.4-1.6 μ m, and its advantage is: when 1, behind the gear stand under load slide relative taking place, can not abrade the flank of tooth of small gear, improve the bearing capacity of gear, reduced operational noise; 2, guarantee the adsorptivity of gear mesh lubricant oil, can guarantee to form liquid lubrication.

Gear of the present invention improves 30%-50% than common hard flank of tooth involute gear bearing capacity, noise decline 5-10db (A), and along with load increases, the noise 2-3db (A) that also will descend.

The inventive method is simple to operate, can partly carry out grinding to the whole recessed flank profil of gear.

Description of drawings

Fig. 1 is the mesh schematic representation of point-line meshing gear

Fig. 2 is for adding the schematic representation in man-hour with the inventive method

The direction of arrow among Fig. 2 is respectively gearwheel rolling movement direction, emery wheel sense of rotation, the emery wheel direction that pumps.

Embodiment

As shown in Figure 1, point-line meshing gear comprises the gearwheel 1 and the small gear 2 of pair of meshing, point-line meshing gear of the present invention, and the surface roughness Ra of the recessed flank profil part of its gearwheel 1 is between 0.4-1.6 μ m.

As shown in Figure 2, point-line meshing gear roll flute processing method of the present invention, it comprises the roll flute process step of gearwheel 1, the steps include:

(1), the blank of gearwheel 1 is contained on the axle, proofread and correct gear ring radially with end face run-out, then with the central plane of emery wheel 3 helix plane perpendicular to the tooth of gearwheel 1;

(2), the emery wheel 3 (1500r/min-3000r/min) of rotation is to the tooth root feed of gearwheel 1 and pump, while gearwheel 1 is made rolling movement around axle;

(3), recessed flank profil is ground to required size, and the surface roughness Ra that makes recessed flank profil part between 0.4-1.6 μ m.

Above-mentioned emery wheel is a tapered wheel.

Claims (2)

1, a kind of point-line meshing gear, it comprises the gearwheel (1) and the small gear (2) of pair of meshing, it is characterized in that: the surface roughness Ra of the recessed flank profil part of gearwheel (1) is between 0.4-1.6 μ m.

2, a kind of point-line meshing gear roll flute processing method, it is characterized in that: it comprises the roll flute process step of gearwheel (1), the steps include:

(1), the blank of gearwheel (1) is contained on the axle, proofread and correct gear ring radially with end face run-out, then with the central plane of emery wheel (3) helix plane perpendicular to the tooth of gearwheel (1);

(2), the emery wheel (3) of rotation is to the tooth root feed of gearwheel (1) and pump, while gearwheel (1) is made rolling movement around axle;

(3), recessed flank profil is ground to required size, and the surface roughness Ra that makes recessed flank profil part between 0.4-1.6 μ m.

Above-mentioned emery wheel (3) is a tapered wheel.

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