One, what is to not have seam square quadrature canal?

Without seam square quadrature canalIt is one kind is passedCold-drawingOrHeat squashsWait for special technology, willWithout the canal that seam a circleAs preform, treatment becomes square or rectangular and sectional steel tube.

The feature of its core is: Its whole does not have welding line, have the sectional figure of square rectangular canal at the same time.

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2, basically characteristic

Without seamed square quadrature canal to center without the advantage that seams canal and structure to be in charge of with square quadrature at a suit:

1. Without welding line, security is extremely high: This is its photograph the dominant position with basic canal of square to soldering quadrature. Because do not have welding line, eliminated welding line this potential weak point, because of,avoided welding line quality not beautiful (be like not solder is appeared, stomatic, slag inclusion) the invalidation risk that cause.

2. Superior full physical power learns function:

• Intensity is high: In cold-drawing process, meeting tubal material produces treatment sclerosis, intensity gets promotion.

• Function is even: Isotropy, even mechanical property is had on each direction, unlike solder provides the function difference that is put in mother capable person and welding line area in that way.

Extremely tall dimension precision and surface are bright and clean degree: Cold-drawing craft can produce a dimension public errand the tubal material with extremely strict, ooth, specious wall.

Sectional character is good: Acceded square rectangular canal defies a turn, fight twist stiffness big, the exterior is beautiful, facilitating connective characteristic.

Defect:

• Manufacturing cost is very high: Technological process is long, specific power consumption is big, n is relatively inferior, bring about its price outclass to solder square quadrature canal.

• Norms dimension suffers be restricted: Be machined the limitation of equipment and technology, its edge grows and mural large range is inferior to soldering square quadrature canal is so agile with wide extensive.

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3, basically workmanship

1. Cold-drawing law (mainstream technology)

• Flow: warm-up treatedWithout the canal that seam a circleThrough specialMould(square shapes model) undertake cold-drawing, make its produce plasticity to be out of shape, be become by drawing from the circle quadrate or rectangular.

• Advantage: Dimension precision is extremely tall, exterior quality is good, intensity promotion.

• Defect: Produce Daociduo, efficiency is low, cost is high.

Heat up extruding law

• Flow: Put heating round billet extruder, through square shapes mould, one-time extrusion.

• Advantage: It is tall alloy, difficult to suit production metabolic material is qualitative.

• Defect: Installation cost is huge, cost is extremely high.

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4, basically use a field

As a result of its high cost, without seam square quadrature canal to be not current data, basically use at those is opposite howeverSecurity and dependability have extreme demandspecific domain:

1. System of high-pressured hydraulic pressure

• Canister of hydraulic pressure crock: Use at heavy-duty project machine (like machine of compose of grab, aegis) , of equipment of aerospace, war industryHydraulic pressure oil cylinder. The requirement bears extremely high in-house pressure and cannot have any leak risks, without seaming a structure is beautiful choice.

Car and traffic are carried

• Heavy-duty lorry frame, Passenger car framework: Use in crucial position getting power, increase integral structure intensity and fatigue resistance can.

• Cycle racing is prevented boil frame: Requirement material has extremely high intensity and tenacity, without the safe safeguard that seams a structure to be able to have been offerred.

Accurate and mechanical equipment

• Slideway of high accuracy machinery, The axis that prop up, Automation equipment frame: Use the measure that sex of its Gao Gang mixes.

The sources of energy and chemical equipment

• In be being made with equipment in the transportation of medium of certain high pressure, caustic or dangerous sex, should solder when square quadrature canal cannot satisfy safe requirement, can choose without seam square quadrature canal.

High-end furniture and building are decorated

• Use at be being mixed to exterior quality beautiful spend requirement pole to taste interior trim of furniture or building high, its do not have seamed surface more perfect.

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5, with solder the deepness that square quadrature is in charge of contrasts

This is the crucial decision-making point when type selecting. To reveal both distinction more intuitionisticly, next graphs from " relative cost " and " function / dependability asks " two dimension are spent, seam to notting have square quadrature is in charge of and solder square quadrature canal had fixed position: From on the graph can see clearly:

• Solder square quadrature canalBe great majority applicationEconomy is chosen practically, the interval that fixed position asks in low cost, medium function.

• Without seam square quadrature canalLocate forHigh-end solution, the service has pursuit at those pairs of function and safety, and the specific domain with enough budget.

Besides chart medium core locates, they still have the following and crucial difference on technicality:

Feature	Without seam square quadrature canal	Solder square quadrature canal
Core technology	Cold-drawing / heat squashs	Cold turn shapes + solder
Whether to put in welding line	Without	Have(or many be seamed continuously or helix is seamed)
Mechanical function	Whole is even, intensity is high, isotropy	Welding line area and mother capable person have difference, function anisotropy
Bear control capacity	Extremely tall	Tall (but welding line is weak point)
Dimension precision and surface	Extremely tall, bright and clean degree good	Tall, but normally slightly under not have seam a canal
Produce cost and price	Very exalted	Economy
Norms flexibility	Suffer be restricted	Extremely strong(producible exceed large size, Bao Bi, large wall)
Main application	Equipment of high-pressured oil cylinder, crucial structure, high end	Building construction, mechanical frame, common carry