CN204878540U - High strength ladder chain - Google Patents

Abstract

The utility model provides a high strength ladder chain, the chain including the chain link connected step by step, its characterized in that: the chain link be the isosceles trapezoid chain link, every chain link unit comprises with four bent angle portions that are located above -mentioned shin both ends four shins, wherein, the shin with bent angle portion constitutes the inner space of linkage unit, and two adjacent chain links are at the mutual lock joint of bent angle portion. The utility model discloses a trapezoidal chain link is adopted, acute angle at the obtuse angle can be formed to improve the effect of bark by a wide margin.

Description

High strength ladder chain

Technical field

A kind of chain of the utility model, is specially a kind of high strength ladder chain and manufacture method thereof.

Background technique

Wood consumption 5 billion cubic meters nearly in the present whole nation, comprise that the paper pulp such as log, sheet material shaving board, wad amount to out.The dependence on external supply degree of present timber reaches 50%.To the year two thousand twenty, the Wood demand of country reaches 8 billion cubic meters possibly.Therefore, it is huge that trees fell market, and for China Heilungkiang, the Eleventh Five-Year Plan period, Northeast China, the timber yield of key state owned forest regions, the Inner Mongol will be 1080.5 ten thousand steres.

North America and Northern Europe Dou Shi forestry big country, Russia is the country that the forest resources are the abundantest in the world, and its forest resources account for 22% of the whole world, is current one of a few country allowing timber to export in a large number in the world.And the Muscovite forest resources have 60% to be distributed in the Far East Area bordered on China.According to statistics, border area, Muscovite Khabarovsk, forest-covered area is 5,250 ten thousand hectares, timber reserves 52.3 billion cubic meter, and mature forest and overmature forest deposit are 31.4 billion cubic meters, and year fells amount of wood ten thousand stere more than 500; Autonomous prefecture of Muscovite Jew forest-covered area captures 39% of native area, and timber storage level is 1.7 billion cubic meters, and within its year, cutting has 440 ten thousand steres, and therefore, external market of felling is huge.

Timber flaying machine is indispensable equipment in log felling process, along with the growth of log demand, also will enter high demand, steady-state growth stage.Timber flaying machine is divided into cutting to strip off the skin and gets rid of chain and to strip off the skin two kinds of modes, get rid of chain strip off the skin high with efficiency, strip off the skin clean, the good service behaviours such as timber infringement is little are used extensively.

Strip the bark from a tree and use the development of chain from structural type, mainly contain oval chain and square chain, there is production in each producer of general oval chain, and it is fewer that square chain is produced at home, and its development is as follows:

1, general oval chain

Oval chain manufacturer is many, with stripping off the skin in machinery in early days.

Usual oval chain comprises most and is substantially oblong linkage unit.In the process of stripping bark, cause the wearing and tearing of trace at the outer surface of throwing-chain linkage unit owing to knocking tree skin.At the internal surface of linkage unit, especially then serious wearing and tearing will be caused in the opposite ends region of the mutual snapping of the linkage unit of adjacent segment.

The result that above-mentioned wearing and tearing cause is that throwing-chain must regularly replace, and changes the capital cost that throwing-chain result in great number, and must cause the loss of productivity.Therefore, oval chain due to its reason such as structure, size, costly, working effect is undesirable.

2, square chain

Square chain consumption in actual production is less, manufacturer is also less, compare if any Zhenjiang new area Wei Cheng industrial and mineral machinery plant in production and sales, compare oblong chain, square chain has certain advantage, if linkage unit angle section is 90 ° of bent angles, the corner angle of projection are conducive to bark, and part increases usability.

At the internal surface of linkage unit, serious wearing and tearing then will be caused in the opposite ends region that the mutual mouth of linkage unit especially broken in adjacent chain connects.

The result that above-mentioned wearing and tearing cause is that throwing-chain must regularly replace, and changes the capital cost that throwing-chain result in great number, and must cause the loss of productivity.Therefore oval chain is due to its reason such as structure, size, and costly, working effect is undesirable.

Summary of the invention

The utility model, for the deficiencies in the prior art, provides a kind of high strength ladder chain and manufacture method thereof, by adopting Trapezoid chain link, can form one, obtuse angle acute angle, thus significantly improving the effect of bark.

For reaching above object, the technological scheme that the utility model adopts is:

A kind of high strength ladder chain, comprise the chain link connected step by step, it is characterized in that: described chain link is Trapezoid chain link, each link units is made up of four shanks and four angle section being positioned at above-mentioned shank two ends, wherein, described shank and described angle section form the inner space of linkage unit, and adjacent two chain links are at the mutual snapping of angle section.

Further, described Trapezoid chain link is non-right angle trapezium structure.

Further, described trapezoidal be isosceles trapezoid.

A making method for high strength ladder chain,

The technological process of trapezoidal loop chain is:

Shearing blanking: adopt 20Mn2 round steel to be raw material,

A. chaining: use original chain braiding machine, carries out chaining shaping to trapezoidal chain link;

B. flash welding: use flash welding machine, trapezoidal chain link is carried out Flash Butt Welding;

C. deburring: will complete the trapezoidal loop chain of welding, and utilize the waste heat of trapezoidal loop chain postwelding, by longitudinal deburring cutter, divides the burr partly removing trapezoidal loop chain postwelding;

D. heat treatment: the heating means adopting Medium frequency induction, quenching temperature 910 DEG C-920 DEG C, time 35-40 minute, tempering temperature 350-370 DEG C, time 20-25 minute; Chain link controls as HRC40-45 by the hardness after intermediate frequency heat treatment;

E. stretch: by stretching, the elongation after the stretching of fixed length chain link being carried out to the length of trapezoidal loop chain, controlling 3% into raw footage; It is 450-500N/mm2 that tensile stress controls;

F. check.

Working principle of the present utility model and beneficial effect show:

Chain link of the present utility model adopts Trapezoid chain link, and Trapezoid chain link is not by pinned connection, but between chain link itself, mutual snapping realizes connecting.

1, the wear resistance of trapezoidal loop chain

In use, linkage unit is no more than the mutual snapping of angle section that two angle section can be corresponding to adjacent Opposite direction connection unit.Therefore, there are two to remain angle section at any time and are in non-buckle state.All the time snapping or non-buckle state is all in due to any one angle section in use can not be had, the wearing and tearing caused because rubbing between adjacent snapping angle section are just dispersed between the angle section of linkage unit substantially, and the linkage unit therefore compared in oval chain extends the time of wearing and tearing.Such as, the linkage unit of trapezoidal loop chain has four fastening region, and relative to the linkage unit that oval chain only has two parts to be interlockingly connected with adjacent Opposite direction connection unit, wearing-in period can extend twice in same degree.

2, the service behaviour of trapezoidal loop chain

Another advantage of trapezoidal loop chain is that the outer surface of two non-snapping angle section is outwardly from linkage unit, one of them be obtuse angle, one be acute angle, the outstanding part of acute angle is compared oval chain and is conducive to stripping the bark from a tree, and improves service behaviour.

Have developed the trapezoidal loop chain of high strength, adopt and can realize the complex-curved processing of trunk, ensure that its desirable bark service behaviour.

Adopt the trapezoidal loop chain of high strength that hoop chain production line is produced, by the special process parameter such as stretching, shaping, power frequency process of setting, in the trapezoidal loop chain after processing is wear-resisting on bark, to achieve compared with common loop chain more than life twice.

Accompanying drawing explanation

Fig. 1 is link configuration schematic diagram of the present utility model.

Embodiment

The correlation technique content do not addressed below all can adopt or use for reference prior art.

Technological scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technological scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.

Shown in Fig. 1: a kind of high strength ladder chain, comprise the chain link connected step by step, described chain link is Trapezoid chain link, each link units is made up of four shanks and four angle section being positioned at above-mentioned shank two ends, wherein, described shank and described angle section form the inner space of linkage unit, and adjacent two chain links are at the mutual snapping of angle section.

The Trapezoid chain link of the present embodiment is isosceles trapezoid, and between chain link itself, mutual snapping realizes connecting.

The size of the chain link of the present embodiment is as follows: upper shank is of a size of 39 ± 0.5mm, and lower shank is of a size of 42 ± 0.5mm; Left shank is of a size of 39 ± 0.5mm, the high 73 ± 0.5mm of whole chain link, and chain link diameter is 17mm, and the interior radius of four angle section is 8.75mm, and outer radius is 25.25mm.

The technique of this trapezoidal loop chain is as follows:

Shearing blanking → heating in medium frequency → chaining → flash welding → deburring → heat treatment → stretching → inspection → japanning warehouse-in, main process route is as follows:

A. chaining: adopt fully automatic electric Gas fluid pressure chain braiding machine to carry out hot chaining (monocycle, segment, grow continuously).

B. flash welding: the welding of trapezoidal loop chain adopts the mode of flash welding, full-automatic flash welding machine adopts pulse preheating flash butt welding method, can weld the hoop chain of highest level; Subsequently loop chain is sent from machine.This full-automatic flash welding machine can weld contiguous links, and namely chain is soldered in once-through operation, and also can weld by spacer ring, namely chain transmits twice on machine.Fully automatic working circulation, from welding station, is realized by the saddle type system promoting conveying means.Chain link is adjusted immediately, is clamped, and then completes flash welding operation by process parameter control.

C. deburring: will complete the trapezoidal loop chain of welding, and utilize the waste heat of trapezoidal loop chain postwelding, selects longitudinal deburring cutter of different two-way workings according to the trapezoidal loop chain of different size diameter, divide the burr partly removing trapezoidal loop chain postwelding, automatically complete deburring operation.

D. heat treatment: the heating means adopting Medium frequency induction, adopts the heating means of Medium frequency induction, quenching temperature 910 DEG C-920 DEG C, time 35-40 minute, tempering temperature 350-370 DEG C, time 20-25 minute; Chain link controls as HRC40-45 by the hardness after intermediate frequency heat treatment;

Frequency Induction Heating speed is fast, the time is short, efficiency is high, chain oxidation is few, and surface quality is good, and the austenite crystal of chain is superfine, and the martensitic structure obtained after quenching is also very thin, and the thermal treatment quality of chain is greatly improved.

E. stretch: by stretching, fixed length being carried out to the length of trapezoidal loop chain, controlling 3% into raw footage; It is 450-500N/mm2 that tensile stress controls, and makes chain create certain prestressing force, improves the non-deformability in the tensile yield point of chain and using process.

F. check: company has perfect detection facility, as PSB1000/4D computer control fatigue testing machine, MeF2 type microscope testing instrument, chemical constituent analyzer, 100 tons of tensile testing machines etc., ensure that quality of product.

By searching, there is no trapezoidal loop chain production and sales both at home and abroad, therefore only the existing chain that strips the bark from a tree being contrasted.

Enterprise name	Chain form	Model specification	Material	Minimum Breaking force	Equal conditions lower working life
						Zhenjiang new area Wei Cheng industrial and mineral machinery plant	Square chain	Φ17*39	12Mn VB	≥550	308h
Nantong Hua Yang chain Co., Ltd	Hoop chain	Φ17*47	Iron material	≥450	310h
						Tai'an Rui Xiang electromechanical equipment Manufacturing Co., Ltd	Rectangular chain	Φ16*48*24	12Mn VB	≥550	315h
Functional Chain Co., Ltd. of Australia	Square chain	Φ17*39	Iron material	≥450	382h
						Shandong gold constant force Machinery Manufacturing Co., Ltd.	Ladder chain	Φ17*39*42	High intensity cold steel rolling	≥800	468h

Visible, the ladder chain minimum destructive force adopting the utility model to produce obviously promotes, and better can be competent at the work of bark by the special construction of this ladder chain, extends working life greatly simultaneously.

The above is only the preferred implementation of the application, those skilled in the art is understood or realizes the application.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (3)

1. a high strength ladder chain, comprise the chain link connected step by step, it is characterized in that: described chain link is Trapezoid chain link, each link units is made up of four shanks and four angle section being positioned at above-mentioned shank two ends, wherein, described shank and described angle section form the inner space of linkage unit, and adjacent two chain links are at the mutual snapping of angle section.

2. high strength ladder chain according to claim 1, is characterized in that: described Trapezoid chain link is non-right angle trapezium structure.

3. high strength ladder chain according to claim 1 and 2, is characterized in that: described trapezoidal be isosceles trapezoid.