CN202845804U

CN202845804U - centre

Info

Publication number: CN202845804U
Application number: CN 201220437906
Authority: CN
Inventors: 蔡泳
Original assignee: Zhuzhou Nanfang Gas Turbine Packaging and Installation Co Ltd
Current assignee: Zhuzhou Nanfang Gas Turbine Packaging and Installation Co Ltd
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2013-04-03
Anticipated expiration: 2022-08-30

Abstract

The utility model provides a centre which comprises a cone-shaped portion connected with the end portion of a hollow shaft in an apical grafting mode. A plurality of carbide bars extending along the bus direction of a conical surface of the cone-shaped portion are embedded on peripheral side of the cone-shaped portion. According to the centre, due to the fact that the plurality of the carbide bars extending along the bus direction of the conical surface of the cone-shaped portion are embedded on the peripheral side of the cone-shaped portion, strength of the conical surface is effectively improved, and pull grooves is prevented from being generated on the conical surface caused when the conical surface abuts against the end portion of the hollow shaft to solve the problem that the processing accuracy of the hollow shaft parts reduces.

Description

Top

Technical field

The utility model relates to the axle manufacture field, in particular to a kind of top.

Background technology

In the prior art, add man-hour for hollow slender axles, because manufacturing procedure is long, produce easily distortion in the process.When carrying out the axle Cylindrical Grinding Processes, generally adopt two top two ends of withstanding hollow shaft to carry out cylindricalo grinding.General top material is T12A, and heat treatment is HRC50-55.

Adopt above-mentioned toply when carrying out Cylindrical Grinding Processes, can make all technical of hollow shaft all reach requirement.But as illustrated in fig. 1 and 2, top tapered portion 10 materials of the prior art do not have specially treated, two of being connected to the hollow shaft two ends are in use for some time top, particularly during hard higher of the material of hollow shaft, the groove that draws that has occurred whole circle on top and the conical surface that the hollow shaft end contacts has affected the machining accuracy of part outer.This is because the hollow shaft part is longer, need the excircle part of grinding also longer, so part has produced larger vibrations when lathe carries out Cylindrical Grinding Processes, causes the top conical surface that contacts with part to produce wearing and tearing.

The utility model content

It is anti abrasive top that the utility model aims to provide a kind of conical surface, to solve that the top conical surface in use occurs drawing groove and the problem that causes the processing parts precision to reduce.

It is a kind of top that the utility model provides on the one hand, comprises and the tapered portion of hollow shaft end apical grafting, is inlaid with many carbide alloy bars that extend along the generatrix direction of the conical surface of tapered portion on the outer circumferential side of tapered portion.

Further, the carbide alloy bar is at least three.

Further, many mounting grooves that extend along the generatrix direction of the conical surface of tapered portion are set on the outer circumferential side of tapered portion, the carbide alloy bar is arranged in the mounting groove.

Further, carbide alloy bar and tapered portion are welded and fixed.

Further, carbide alloy bar and tapered portion brazing welding.

According to of the present utility model top, be inlaid with many carbide alloy bars that extend along the generatrix direction of the conical surface of described tapered portion by the outer circumferential side in tapered portion, thereby effectively improve the intensity of the conical surface, prevent the conical surface and hollow shaft the end butt the time cause occurring on the conical surface drawing groove, the problem that reduces to solve the hollow shaft part processing precision.

Description of drawings

The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the top structural representation of the first in the prior art;

Fig. 2 is the top structural representation of the second in the prior art;

Fig. 3 is the structural representation according to top the first embodiment of the present utility model;

Fig. 4 is the partial sectional view at A-A place among Fig. 3;

Fig. 5 is the structural representation according to top the second embodiment of the present utility model;

Fig. 6 is the partial sectional view at B-B place among Fig. 5.

The specific embodiment

Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.

Shown in Fig. 3 and 5, according to of the present utility model a kind of top, comprise and the tapered portion 10 of hollow shaft end apical grafting, be inlaid with many carbide alloy bars 12 that extend along the generatrix direction of the conical surface of tapered portion 10 on the outer circumferential side of tapered portion 10.The utility model is by tungsten carbide button's bar 12 on the outer circumferential side of tapered portion, thereby effectively improve the intensity of the conical surface, prevent the conical surface and hollow shaft the end butt the time cause occurring on the conical surface drawing groove, the problem that reduces to solve the hollow shaft part processing precision.Carbide alloy bar 12 extends to the two ends of whole cone element, thereby the whole conical surface is formed effective protection, is convenient to process the hollow shaft of different-diameter.And the top or whole tapered portion that the utility model is compared the manufacturing of direct employing carbide alloy material all adopts carbide alloy, can effectively save cost, reduces difficulty of processing.

Carbide alloy bar 12 is at least three and evenly distributes on the conical surface, could effectively form protection to the whole conical surface.Preferably, shown in Fig. 3 to 6, four carbide alloy bars 12 are set, and are evenly distributed on the conical surface, thereby improve protection intensity, be unlikely to again to make manufacturing cost too high, also be unlikely to make manufacture difficulty excessive.

The utility model preferably embodiment adopts the outer circumferential side in tapered portion 10 that many mounting grooves 11 that extend along the generatrix direction of the conical surface of tapered portion 10 are set, and carbide alloy bar 12 is fixedly installed in the mounting groove 11.In order to be fixing reliable, general employing welding makes carbide alloy bar 12 fixing with tapered portion 10.Preferably, adopt brazing to fix, make fixing more reliably, can bear the jerk that hollow shaft adds man-hour, improve top reliability.

Top manufacture method of the present utility model may further comprise the steps: step 1: offer many mounting grooves 11 that extend along the generatrix direction of the conical surface of tapered portion 10 at the outer circumferential side of rough machined tapered portion 10; Step 2: carbide alloy bar 12 is arranged in the mounting groove, and the brazing welding; Step 3: the conical surface of welding being finished the tapered portion 10 of carbide alloy bar 12 makes up Cylindrical Grinding Processes.

Be in particular, on the top conical surface, along the circumferential direction open four and widely deeply be the groove of 7mm for 12.5mm, carbide alloy bar with four corresponding sizes is embedded in the groove again, carry out again brazing, then with the carbide alloy bar and toply the top conical surface is being made up Cylindrical Grinding Processes after welding together, thereby make the outer surface of carbide alloy bar and the top integral body of conical surface formation shown in Fig. 4 and 6.This carbide alloy strip material trade mark is YG8.

As can be seen from the above description, the utility model the above embodiments have realized following technique effect:

The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

One kind top, comprise and the tapered portion (10) of hollow shaft end apical grafting, it is characterized in that, be inlaid with many carbide alloy bars (12) that extend along the generatrix direction of the conical surface of described tapered portion (10) on the outer circumferential side of described tapered portion (10).
2. according to claim 1 top, it is characterized in that described carbide alloy bar (12) is at least three.
3. according to claim 1 top, it is characterized in that, many the mounting grooves (11) that extend along the generatrix direction of the conical surface of described tapered portion (10) are set on the outer circumferential side of described tapered portion (10), and described carbide alloy bar (12) is arranged in the described mounting groove (11).
4. according to claim 3 top, it is characterized in that described carbide alloy bar (12) is welded and fixed with described tapered portion (10).
5. according to claim 4 top, it is characterized in that described carbide alloy bar (12) and described tapered portion (10) brazing welding.