CN87101564A

CN87101564A - Rolled-welded pulley and manufacture method thereof

Info

Publication number: CN87101564A
Application number: CN87101564.1A
Authority: CN
Inventors: 张智邦; 张茂发; 杨辅运; 李启友; 俞企明; 许盛春; 于文富
Original assignee: NO 4 BRANCH OF DALIAN CRANE PLANT
Current assignee: NO 4 BRANCH OF DALIAN CRANE PLANT
Priority date: 1987-05-19
Filing date: 1987-05-19
Publication date: 1988-11-30
Also published as: CN1004724B

Abstract

A kind of rolled-welded pulley, existing casting pulley difficult quality guarantee, waste energy, befouling environment, how yielding the welded pulley weld seam is, through the pulley of cutting, man-hour is many, and is uneconomical with material all in one piece.The wheel rim of pulley belt grooving of the present invention and disc are to adopt steel plate whole rolling.Its method is: monoblock annular slab embryo placed on the mold, and through the center line of the different roll of function along thickness, by U-shaped grooving degree of depth requirement rolling-forming successively.This method technology is simple, save the energy, low cost of manufacture, its pulley from heavy and light, intensity guarantee, long service life.

Description

Rolled-welded pulley and manufacture method thereof are about pulley, the particularly invention of used pulley on the crane gear.

Known pulley, the pulley on the crane gear particularly, the general foundry goods such as cast iron, spheroidal graphite cast iron, cast steel that adopt, the shortcoming that is caused because of casting technique itself is that reject rate height, casting quality are difficult to guarantee, the waste material and the energy, befouling environment, labor strength are big, and the casting pulley is from great, wheel rim cracky in use.Also occur welded pulley in recent years, though its person of being better than because weld seam is many, easily produces welding stress and distortion, quality is difficult for also guaranteeing that the local hardening of wheel rim butt weld simultaneously makes by the wire rope of pulley easily frayed.Also have in addition and adopt material all in one piece to become pulley through cutting, though this kind product is better than above-mentioned two kinds, machining period is many, and spillage of material is big, uneconomical.

The objective of the invention is to: provide a kind of and alleviate deadweight, reduce the pulley of welding stress and distortion and technology is simple, the method for low cost of manufacture.

A kind of rolled-welded pulley and manufacture method thereof, this pulley has the wheel hub of a ring, weld together with the ring disc, disc links to each other with the wheel rim of band U-shaped grooving and it is characterized in that, has the wheel rim and rolling the forming of the as a whole parts of disc of U-shaped grooving.This pulley manufacturing method is characterised in that, the wheel rim and the disc thereof of band U-shaped grooving are by the monoblock annular slab embryo that places on the mold, through the center line of the different roll of function along thickness, by U-shaped grooving degree of depth requirement whole rolling-forming successively.Roll is divided into opening roll, half-formed roll and molding roller.

It is made up of rolled-welded pulley the disc of belt wheel edge and wheel hub, they radially with axial equal symmetry.Wheel hub is a ring, and the inner edge of its outer rim and ring disc welds together, the as a whole parts of wheel rim and disc, and the U-shaped grooving on its wheel rim is rolled into by roll.

The milling method of U-shaped grooving is that the monoblock annular slab embryo with desired thickness and diameter places on the mold, and (mold is divided into two-part, and promptly fixedly tire also is called tire and following tire with movable tire) selects the mold of different size for use according to different pulley specifications.Mold clamping panel embryo, roll configuration are in the mold outside, and its axle is parallel with the mold axle.The mold axle is a driving shaft during work, and roll mandrel is a driven shaft.The center line of plate flake thickness degree is the center line of mill train, uses the different roll of several functions to be rolled successively along the center line of thickness.At first use the opening roll, (being equivalent to cutter) radially opens the mouth of certain depth with ring plate embryo along excircle mid-depth line, thereby the plate embryo is partly separated from center line, is that the transiens roll is further rolling along original mill train with half-formed roll then.The boundary dimension of transiens roll is between opening roll and molding roller, and according to the different situations of product, half-formed roll only rollingly once gets final product with one sometimes, then will adopt several rolls several times rolling sometimes.Then use forming roll at last, i.e. the measure-alike roll of profile and grooving repeats rollingly along former mill train, can obtain the pulley semi-finished product that satisfactory wheel rim of surface finishment and disc are one.Again its inner rim and wheel hub outer rim are welded, process in case of necessity or heat treatment, just can obtain all satisfactory pulley of rigidity, intensity.

Its feature of pulley of the present invention itself has determined it better than casting quality, from heavy and light, the saving energy, free from environmental pollution.Wherein wheel rim and the disc with U type grooving is whole rolling, therefore reduced welding stress, and intensity, rigidity all meet the demands.Under same size condition, owing to alleviated the bearing capacity that improves equipment from Beijing South Maxpower Technology Co. Ltd, this has not only saved steel, but also can improve the labour productivity of crane gear.Make the surface layer sclerosis through rolling U-groove bevel, not only improved the wear resistance of pulley but also do not damaged wire rope, prolonged working life.Simple, with short production cycle, the low cost of manufacture of method technology of the present invention.

Utilize the example shown in the accompanying drawing that invention is described further.

Fig. 1 is the sectional view of rolled-welded pulley.

Fig. 2 is the partial sectional view of mold.

Fig. 3 is the sectional view of opening roll.

Fig. 4 is the sectional view of half-formed roll.

Fig. 5 is the sectional view of molding roller.

Described rolled-welded pulley in Fig. 1, it has an annular wheel hub (3), it and the inner edge welding of the annular disc (2) of band grooving, and disc overlaps with the radial centre lines of wheel hub.And disc and the as a whole parts of wheel rim (1) of being with the U-shaped grooving, the U-shaped grooving on its wheel rim is rolling forming.

The making method of rolled-welded pulley: at first be with the even steel plate of desired thickness, be processed into plectane with holes, its internal diameter is the internal diameter of disc, and its exradius deducts groove depth by long half of grooving profile expansion and comes made allowance.Along the center line of annular slab flake thickness degree open one wide be that 1 mm depth is 10 millimeters incorgruous mouthful (different with the pulley flute profile), be mill train.In mold shown in Figure 2, mold is divided into two-part, and last tire (4) is fixed on the axle, and following tire (5) is movable tire.Above-mentioned annular slab embryo is placed up and down fix tightly between the tire, along mill train use opening, that the half-formed roll different with three functions of moulding carries out integral body successively is rolling.

What Fig. 3 described is the opening roll, its along mill train to radially opening the opening (different) that the degree of depth is approximately the grooving mid-height with different process.

What Fig. 4 described is half-formed roll, and it still is rolled along former mill train, makes the opening that rolls part to the transition of U-shaped grooving.

What Fig. 5 described is the typing roll, and it carries out last rolling along former mill train, can obtain all satisfactory integral wheel rim of size, shape and surface finishment and disc thus.

Half-finished inner edge that the outer rim and the said method of wheel hub obtained welds, and then wheel hub is suitably processed, and can obtain rolled-welded pulley.

Claims

1, a kind of rolled-welded pulley and manufacture method thereof, this pulley has the wheel hub [3] of a ring, weld together with ring disc [2], disc links to each other with the wheel rim [1] of band U-shaped grooving, it is characterized in that: the wheel rim and rolling the forming of the as a whole parts of disc that have the U-shaped grooving.

2, its manufacture method of the pulley of claim 1 is characterised in that: the wheel rim and the disc thereof of band U-shaped grooving, be by the monoblock annular slab embryo that places on the mold, through the center line of the different roll of function along thickness, by U-shaped grooving degree of depth requirement whole rolling-forming successively.

3, rolled-welded pulley according to claim 2 and manufacture method thereof is characterized in that: roll is divided into opening roll, half-formed roll and molding roller.