CN2238351Y

CN2238351Y - Worm with ceramic surface

Info

Publication number: CN2238351Y
Application number: CN 95242439
Authority: CN
Inventors: 韩安澍
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-17
Filing date: 1995-11-17
Publication date: 1996-10-23
Anticipated expiration: 2005-11-17

Abstract

The utility model relates to a worm with a ceramic surface, which comprises a worm body. The utility model is characterized in that the outside part of the teeth of the worm body is provided with a ceramic coating. The utility model has the advantages of low cost, high drive efficiency of the worm, small abrasion and long service life. When the worm is used to be in engagement and transmission with a worm wheel, the utility model can adapt highest sliding speed and contact stress.

Description

The surface ceramic worm screw

The utility model relates to a kind of worm screw, particularly be a kind of surface ceramic worm screw.

In the engagement driving of worm and worm gear, the Sliding velocity between the worm and wheel flank of tooth is very big, and worm geared damage type mainly is gummed, spot corrosion and the wearing and tearing of the worm gear flank of tooth.The Efficiency of Worm Gearing of a few number is lower, often needs with valuable anti-attrition non-ferrous metal.

In view of above reason, the purpose of this utility model is that a kind of cost is low, Efficiency of Worm Gearing is high, wearing and tearing are little in order to provide, the surface ceramic worm screw of long service life.

The utility model comprises worm body, it is characterized in that there is ceramic layer (referring to Fig. 1, Fig. 2) worm body tooth outside, the function type composite material that ceramic layer can be made up of two or more composition (as chromium nitride and chromium, or titanium nitride, titanium, nitrogenize two titaniums).

Transition layer (referring to Fig. 2) is arranged between above-mentioned worm body tooth outside and ceramic layer, make between ceramic layer and worm body cohesive force strong, in conjunction with firmly.

Fretting wear occurs in the surface of material.Tribology research shows, when rubbing contact occurs in the widely different two kinds of material surfaces of objectionable intermingling, physical and mechanical properties; Friction factor is minimum, wearing and tearing are minimum, and therefore, the friction fit between pottery and the steel is more satisfactory.Worm body generally is to adopt steel, establish ceramic layer at the worm body tooth surface, particularly ceramic layer adopts the function type composite ceramic material that two or more one-tenth are grouped into, and is very fine and close, almost is atresia, very high cohesive force is arranged, thereby the fatigue resistance height, surface hardness can reach HV1700～3000, and friction factor is little, wear-resistant, corrosion-resistant, can prevent sticking work wearing and tearing effectively.

The utility model worm screw cost is low, and Efficiency of Worm Gearing height, little, the long service life of abrasion when with this worm and wheel engagement driving, can adapt to higher Sliding velocity VS (m/s).Compare with worm screw, the worm drive of existing structure, under identical Sliding velocity VS situation, have bigger allowable contact stress (N/mm ²), have longer working life; Under identical service condition, for the product miniaturization Design has been created condition.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model structural representation.

Fig. 2 is the A enlarged view of Fig. 1.

Fig. 3 is the worm and worm gear mesh schematic representation.

Referring to Fig. 1, Fig. 2, worm body 1 adopts steel to make, and surface hardening hardness is HRC58-60, the 2 helical surface roughness Ra1.6 of tooth portion～0.4 μ m.Adopt physical gas phase deposition technology, the gradual transition layer 2 of deposit thickness 0.1 μ m at first by steel atom and the surface ceramic material atom or the molecular composition of worm body tooth portion, and then deposits the surface ceramic layer 3 of 1～3 μ m thickness.

Fig. 3 is the mesh schematic representation of the utility model worm and worm wheel.Worm gear 4 adopts steel to make, and its surface hardening hardness is HRC45～60, surface roughness Ra 6.3 μ m.When worm screw was rotated, worm tooth and worm gear gear teeth generation sliding friction promoted worm gear and rotate.

Claims

1, the surface ceramic worm screw comprises worm body, it is characterized in that there is ceramic layer described worm body tooth outside.

2, surface ceramic worm screw as claimed in claim 1 is characterized in that between described worm body tooth outside and ceramic layer transition layer being arranged.