CN104251254A - Locknut and manufacturing method thereof - Google Patents

Locknut and manufacturing method thereof Download PDF

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Publication number
CN104251254A
CN104251254A CN201410462099.7A CN201410462099A CN104251254A CN 104251254 A CN104251254 A CN 104251254A CN 201410462099 A CN201410462099 A CN 201410462099A CN 104251254 A CN104251254 A CN 104251254A
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China
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described
nut body
internal layer
nut
deg
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CN201410462099.7A
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Chinese (zh)
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CN104251254B (en
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陈双
周礼明
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奥展实业有限公司
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Abstract

The invention belongs to the field of manufacturing of mechanical parts, and particularly relates to a locknut and a manufacturing method thereof. The manufacturing method of the locknut includes an alloy manufacturing step and a nut casting step. Alloy steel materials take the place of copper alloy materials of the prior art, the locknut manufactured is high in hardness and wear resistant, and high-standard requirements of the industry and the construction industry are met. By a step hardening process, phase change stress of the locknut in the process of transformation from austenite to martensite is effectively reduced, and cracks are effectively reduced during transformation. Hardness of the manufactured locknut is improved by 39-45%, wear resistance is improved by 18-22%, and crack rate is reduced by 13-20% as compared with those of the like products made of copper alloy.

Description

A kind of lock nut and manufacture method thereof

Technical field

The invention belongs to the manufacture field of component of machine, particularly relate to a kind of lock nut and manufacture method thereof.

Background technique

Screw and nut are the common fastening pieces of every profession and trade, easily screw occurs, nut gets loose, cause fastening inefficacy in using process.Locking functions in the industry for screw, nut has carried out a large amount of improvement.Traditional lock nut is attached on screw thread mainly with special engineering plastics greatly, internal and external threads is made to tighten process, engineering plastics are extruded and produce powerful reaction force, thus add the frictional force between internal and external threads, provide the absolute resistance to vibration.But the locking mode of plastics is affected by environment, high temperature and severe cold requirement can not be met, how metallic material is replaced engineering plastics to reach the object overcoming above-mentioned technological deficiency in prior art, but the metallic material used mostly is the very high Cuprum alloy of copper content, material hardness is lower, cannot meet the industry of high speed development, the demand of building industry.

Summary of the invention

The object of this invention is to provide a kind of lock nut and manufacture method thereof, the inventive method is simple, and the lock nut hardness of manufacture is high, and high abrasion is applicable to industry, building industry and other field.

For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:

A kind of lock nut, it is characterized in that, by the lock nut obtained by above-mentioned cast molding step, it is characterized in that, it comprises multiple internal layer nut body and an outer nut body; Described multiple internal layer nut body center is cannulated threaded chamber, and periphery cylindrically; Described multiple internal layer nut body thread cavity diameter and the diameter of bolt match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

Preferably, outer nut body cross section periphery is Hexagon or quadrilateral.

Preferably, the upper and lower surface of described multiple internal layer nut body is provided with anti-slip veins.

Preferably, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment.

Preferably, multiple draw-in groove is also being provided with the bolt of the supporting installation of described nut near head side.

Preferably, when described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

A manufacture method for lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

1) get raw material iron and put into low frequency melting furnace at 1000-1200 DEG C of heating 10-15h, then the smelt in low frequency melting furnace is placed in converter 20-35T oxygen top-blown converter simultaneously;

2) after oxygen top blown 10-30min, carry out LF refining 80-100min, add lime 100-150Kg/ stove in LF refining furnace, calcium carbide 50-65Kg/ stove, carries out stirring 40-60min simultaneously, and the slag making time is 10-20min;

3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 3-4m/min, and specific water is 1.5L/Kg, tundish temperature is 1000-1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron;

The cast molding step of described nut is as follows:

Get above-mentioned steel billet putting into oven melting at 1200-1300 DEG C, then in nitrogen environment, imported in mould at 500-700 DEG C by smelt and cool, cooled product carries out stepped quenching process, namely obtains described lock nut after quenching.

Preferably, the manufacturing step of described alloy material is as follows: get raw material iron and put into low frequency melting furnace at 1100 DEG C of heating 15h, then the smelt in low frequency melting furnace is placed in converter 35T oxygen top-blown converter simultaneously; After oxygen top blown 30min, carry out LF refining 80min, add lime 100Kg/ stove in LF refining furnace, calcium carbide 50Kg/ stove, carries out stirring 60min simultaneously, and the slag making time is 20min; Slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 4m/min, and specific water is 1.5L/Kg, tundish temperature is 1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is Fe.

Preferably, in the cast molding step of nut, described stepped quenching process is as follows: be incubated 10-15min by after product heats to 800 cooled in mould DEG C, is incubated 10-13min in the oil of temperature 200-250 DEG C quenched afterwards, then takes out product at room temperature air cooling.

Preferably, the cast molding step of nut is as follows: get steel billet and putting into oven melting at 1250 DEG C, then in nitrogen environment, smelt is imported in mould at 500 DEG C and cools, 13min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 11min in the oil that temperature of quenching afterwards is 200 DEG C, then take out product at room temperature air cooling, obtain described lock nut.

Compared with prior art, tool has the following advantages in the present invention:

1) lock nut of the present invention is installed by multistage nesting type, is mutually engaged between multistage internal layer nut and outer nut, offsets because the factors such as vibration and deformation cause tightness between nut and bolt to be deteriorated.

2) alloy material of the present invention is owing to adding the frictional force between internal and external threads, provide the absolute resistance to vibration, thus reach locking effect, and it is high temperature resistant, cold-resistant, alloy steel material is adopted again to replace Cu alloy material of the prior art, the lock nut hardness manufactured is high, and high abrasion, meets the high standard demand of industry, building industry; Pass through Rockwell hardness test, the like product that the present invention manufactures the hardness Cuprum alloy material more of the prior art of the lock nut of gained improves 39-45%, by measuring the loss of weight of lock nut in abrasive test, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves 18-22%, by crackle detecting instrument, the like product that the present invention manufactures the cracking breakout Cuprum alloy material more of the prior art of the lock nut of gained reduces 13-20%.

3) the present invention adopts stepped quenching process, effectively reduces lock nut material structure from austenite to the transformation stress the process of Martensitic transformation, effectively reduces the generation of crackle in transition process.

Accompanying drawing explanation

Fig. 1 is the lock nut installment state structural representation according to the specific embodiment of the invention;

Fig. 2 is the lock nut exploded perspective schematic diagram according to the specific embodiment of the invention;

Fig. 3 is the lock nut exploded perspective schematic diagram according to the specific embodiment of the invention;

Fig. 4 is the lock nut exploded perspective schematic diagram according to the specific embodiment of the invention;

Fig. 5 is the lock nut disconnecting prevention structure schematic diagram according to the specific embodiment of the invention;

Fig. 6 is the process flow diagram according to lock nut manufacture method in the specific embodiment of the invention.

Embodiment

In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

Embodiment 1

As Figure 1-4, lock nut comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

As shown in Figure 3-4, outer nut body cross section periphery can be Hexagon.Quadrilateral is can be in another preferred implementation ectomesoderm nut body cross section periphery of the present invention; Described multiple internal layer nut body periphery cylindrically.

As shown in Figure 4, the upper and lower surface of described multiple internal layer nut body can be provided with anti-slip veins; Lower surface and the internal surface of described outer nut body also can be provided with anti-slip veins.By described anti-slip veins, when mounted between internal layer nut and most can form enough frictional force between higher level's internal layer nut and the internal surface of outer nut, realize anti-loosing effect further.

As shown in Figure 5, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment; Multiple draw-in groove is also being provided with near head side with the bolt of the supporting installation of described nut.For simplicity, schematically show only in Fig. 5 nut in multiple draw-in grooves set in the disconnecting prevention structure that arranges and bolt, and not shown multiple internal layer nut body and outer nut.When described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

As shown in Figure 6, in the manufacture method of described lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

1) get raw material iron and put into low frequency melting furnace at 1000 DEG C of heating 10h, then the smelt in low frequency melting furnace is placed in converter 20T oxygen top-blown converter simultaneously; Low frequency melting furnace is come heating material by electromagnetic induction.

The external refining of molten steel is the refining task completing in general steel making furnace, and as desulfurization, deoxidation, degasification, removes sonims, the adjustment composition of steel and molten steel temperature etc., moves on in " ladle " outside stove or special container and carries out.So just original process for making is divided into two steps to carry out, the first, in general steel making furnace, carries out fusing and just refining, adopt low frequency melting furnace to carry out just refining in the present embodiment; The second, in ladle or special refining vessel, carry out refining, these " ladles " or special container are called refining furnace.LF refining furnace is adopted to carry out refining in the present embodiment.LF purifying method can adapt to the requirement of continuous casting.In continuous casting process flow process, need be based upon certain hour can for the system of uniform temperature molten steel, and therefore its operation, steady quality plays most important effect.LF purifying method tightly adjusts at molten steel temperature can play maximum effect with activity time management aspect.In addition, LF refining carries out Argon stirring from ladle bottom, molten steel continuous circulation is flowed, molten steel ladle composition tolerances is minimum, the object of accurate control composition can be reached, this function plays great effect to special steel continuous casting, makes to there is concentration of element difference between the adjacent stove of continuous casting minimum, the fluctuation of effective control for product quality characteristic.

Described raw material iron is made up of pig, steel scrap, and wherein pig is the main raw material(s) of steel-making, generally accounts for 70% ~ 100% of charge weight.The chemical heat of the molten iron that pig obtains through heating and physical thermal are the main heating source of oxygen top blown converter steel making.In pig, silicon (Si) content of each element is 0.30% ~ 0.60%; Manganese (Mn) content is 0.20% ~ 0.80%; Phosphorus (P) content is lower≤and 0.20%; Sulphur (S) content≤0.05%; Carbon (C) content is 3.5% ~ 4.5%.Sulphur, the phosphorus content of steel scrap all must not be greater than 0.050%.In steel scrap, residual element content should meet following requirement: nickel (Ni)≤0.30%, chromium (Cr)≤0.30%, copper (Cu)≤0.30%, arsenic (As)≤0.80%.Outside demanganization, silicon, the summation of other alloying element residual content is no more than 0.60%.

2) after oxygen top blown 10min, carry out LF refining 80min, add lime 100Kg/ stove in LF refining furnace, calcium carbide 50Kg/ stove, carries out stirring 40min simultaneously, and the slag making time is 10min.

3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, pulling rate is 3m/min, specific water is 1.5L/Kg, tundish temperature is 1000 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, the component (weight) of described steel billet is as follows: carbon (C) 8-10%, copper (Cu) 10-15%, manganese (Mn) 0.8-1.2%, silicon (Si) 1.3-1.8%, chromium (Cr) 0.2-0.4%, vanadium (V) 0.5-1.8%, phosphorus (P)≤0.08, sulphur (S)≤0.08, surplus is iron (Fe).

Argon stirs and makes molten steel produce circulation in ladle, can with the stirring intensity controlling the method for argon blowing rate and control molten steel, impels the even of molten steel component and temperature.The molten steel stirred adds nonmetallic inclusionsin steel and collides the chance of growing up, and the Argon Bubble of floating can not only absorb the gas in steel, also can adsorb the slag inclusion floated in molten steel, attached slag inclusion can be taken to molten steel surface and absorbed by slag blanket, cleaning molten steel.In addition, molten steel temperature can also be reduced by Argon, make it the requirement meeting casting operation.

The cast molding step of described nut is as follows:

Get above-mentioned steel billet and put into oven melting at 1200 DEG C, then in nitrogen environment, smelt is imported in mould at 500 DEG C and cools, 10min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 10min in the oil that temperature of quenching afterwards is 200 DEG C, then take out product at room temperature air cooling.

By standard GB/T/T230.1-2009 " metallic rockwell hardness test ", hardness test is carried out to the present embodiment manufacture lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present embodiment manufactures the lock nut hardness Cuprum alloy material more of the prior art of gained improves 40%.

After rubbing with sandstone, measure the loss of weight that the present embodiment manufactures the lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves abrasion resistance raising 20%.

By crackle detecting instrument, measure the cracking breakout that the present embodiment manufactures the lock nut of gained and the like product of manufacture technics gained of the prior art, the lock nut cracking breakout that the present embodiment manufactures gained reduces by 15%.

Embodiment 2

As Figure 1-4, lock nut comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber, and periphery cylindrically; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

As shown in Figure 3-4, outer nut body cross section periphery can be Hexagon.Quadrilateral is can be in another preferred implementation ectomesoderm nut body cross section periphery of the present invention.

As shown in Figure 4, the upper and lower surface of described multiple internal layer nut body can be provided with anti-slip veins; Lower surface and the internal surface of described outer nut body also can be provided with anti-slip veins.By described anti-slip veins, when mounted between internal layer nut and most can form enough frictional force between higher level's internal layer nut and the internal surface of outer nut, realize anti-loosing effect further.

As shown in Figure 5, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment; Multiple draw-in groove is also being provided with near head side with the bolt of the supporting installation of described nut.When described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

As shown in Figure 6, in the manufacture method of described lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

1) get raw material iron and put into low frequency melting furnace at 1200 DEG C of heating 15h, then the smelt in low frequency melting furnace is placed in converter 35T oxygen top-blown converter simultaneously;

Described raw material iron is made up of pig, steel scrap, and wherein pig is the main raw material(s) of steel-making, generally accounts for 70% ~ 100% of charge weight.The chemical heat of the molten iron that pig obtains through heating and physical thermal are the main heating source of oxygen top blown converter steel making.In pig, silicon (Si) content of each element is 0.30% ~ 0.60%; Manganese (Mn) content is 0.20% ~ 0.80%; Phosphorus (P) content is lower≤and 0.20%; Sulphur (S) content≤0.05%; Carbon (C) content is 3.5% ~ 4.5%.Sulphur, the phosphorus content of steel scrap all must not be greater than 0.050%.In steel scrap, residual element content should meet following requirement: nickel (Ni)≤0.30%, chromium (Cr)≤0.30%, copper (Cu)≤0.30%, arsenic (As)≤0.80%.Outside demanganization, silicon, the summation of other alloying element residual content is no more than 0.60%.

2) after oxygen top blown 30min, carry out LF refining 100min, add lime 150Kg/ stove in LF refining furnace, calcium carbide 65Kg/ stove, carries out stirring 60min simultaneously, and the slag making time is 20min;

3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 4m/min, and specific water is 1.5L/Kg, tundish temperature is 1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron;

The cast molding step of described nut is as follows:

Get above-mentioned steel billet and put into oven melting at 1300 DEG C, then in nitrogen environment, smelt is imported in mould at 700 DEG C and cools, 15min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 13min in the oil that temperature of quenching afterwards is 250 DEG C, then take out product at room temperature air cooling.

By standard GB/T/T230.1-2009 " metallic rockwell hardness test ", hardness test is carried out to the present embodiment manufacture lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present embodiment manufactures the lock nut hardness Cuprum alloy material more of the prior art of gained improves 41%.

After rubbing with sandstone, measure the loss of weight that the present embodiment manufactures the lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves abrasion resistance raising 22%.

By crackle detecting instrument, measure the cracking breakout that the present embodiment manufactures the lock nut of gained and the like product of manufacture technics gained of the prior art, the lock nut cracking breakout that the present embodiment manufactures gained reduces by 13%.

Embodiment 3

As Figure 1-4, lock nut comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, multiple internal layer nut body is stepped installation from bottom to top vertically, and the internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

As shown in Figure 3-4, outer nut body cross section periphery can be Hexagon.Quadrilateral is can be in another preferred implementation ectomesoderm nut body cross section periphery of the present invention; Described multiple internal layer nut body periphery cylindrically.

As shown in Figure 4, the upper and lower surface of described multiple internal layer nut body can be provided with anti-slip veins; Lower surface and the internal surface of described outer nut body also can be provided with anti-slip veins.By described anti-slip veins, when mounted between internal layer nut and most can form enough frictional force between higher level's internal layer nut and the internal surface of outer nut, realize anti-loosing effect further.

As shown in Figure 5, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment; Multiple draw-in groove is also being provided with near head side with the bolt of the supporting installation of described nut.When described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

As shown in Figure 6, in the manufacture method of described lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

1) get raw material iron and put into low frequency melting furnace at 1050 DEG C of heating 12h, then the smelt in low frequency melting furnace is placed in converter 25T oxygen top-blown converter simultaneously;

Described raw material iron is made up of pig, steel scrap, and wherein pig is the main raw material(s) of steel-making, generally accounts for 70% ~ 100% of charge weight.The chemical heat of the molten iron that pig obtains through heating and physical thermal are the main heating source of oxygen top blown converter steel making.In pig, silicon (Si) content of each element is 0.30% ~ 0.60%; Manganese (Mn) content is 0.20% ~ 0.80%; Phosphorus (P) content is lower≤and 0.20%; Sulphur (S) content≤0.05%; Carbon (C) content is 3.5% ~ 4.5%.Sulphur, the phosphorus content of steel scrap all must not be greater than 0.050%.In steel scrap, residual element content should meet following requirement: nickel (Ni)≤0.30%, chromium (Cr)≤0.30%, copper (Cu)≤0.30%, arsenic (As)≤0.80%.Outside demanganization, silicon, the summation of other alloying element residual content is no more than 0.60%.

2) after oxygen top blown 30min, carry out LF refining 90min, add lime 140Kg/ stove in LF refining furnace, calcium carbide 55Kg/ stove, carries out stirring 45min simultaneously, and the slag making time is 18min;

3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 3m/min, and specific water is 1.5L/Kg, tundish temperature is 1050 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron;

The cast molding step of described nut is as follows:

Get above-mentioned steel billet and put into oven melting at 1200 DEG C, then in nitrogen environment, smelt is imported in mould at 550 DEG C and cools, 13min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 13min in the oil that temperature of quenching afterwards is 230 DEG C, then take out product at room temperature air cooling.

By standard GB/T/T230.1-2009 " metallic rockwell hardness test ", hardness test is carried out to the present embodiment manufacture lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present embodiment manufactures the lock nut hardness Cuprum alloy material more of the prior art of gained improves 39%.

After rubbing with sandstone, measure the loss of weight that the present embodiment manufactures the lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves abrasion resistance raising 21%.

By crackle detecting instrument, measure the cracking breakout that the present embodiment manufactures the lock nut of gained and the like product of manufacture technics gained of the prior art, the lock nut cracking breakout that the present embodiment manufactures gained reduces by 17%.

Embodiment 4

As Figure 1-4, lock nut comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber, and periphery cylindrically; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

As shown in Figure 3-4, outer nut body cross section periphery can be Hexagon.Quadrilateral is can be in another preferred implementation ectomesoderm nut body cross section periphery of the present invention; Described multiple internal layer nut body periphery cylindrically.

As shown in Figure 4, the upper and lower surface of described multiple internal layer nut body can be provided with anti-slip veins; Lower surface and the internal surface of described outer nut body also can be provided with anti-slip veins.By described anti-slip veins, when mounted between internal layer nut and most can form enough frictional force between higher level's internal layer nut and the internal surface of outer nut, realize anti-loosing effect further.

As shown in Figure 5, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment; Multiple draw-in groove is also being provided with near head side with the bolt of the supporting installation of described nut.When described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

As shown in Figure 6, in the manufacture method of described lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

1) get raw material iron and put into low frequency melting furnace at 1180 DEG C of heating 13h, then the smelt in low frequency melting furnace is placed in converter 35T oxygen top-blown converter simultaneously;

Described raw material iron is made up of pig, steel scrap, and wherein pig is the main raw material(s) of steel-making, generally accounts for 70% ~ 100% of charge weight.The chemical heat of the molten iron that pig obtains through heating and physical thermal are the main heating source of oxygen top blown converter steel making.In pig, silicon (Si) content of each element is 0.30% ~ 0.60%; Manganese (Mn) content is 0.20% ~ 0.80%; Phosphorus (P) content is lower≤and 0.20%; Sulphur (S) content≤0.05%; Carbon (C) content is 3.5% ~ 4.5%.Sulphur, the phosphorus content of steel scrap all must not be greater than 0.050%.In steel scrap, residual element content should meet following requirement: nickel (Ni)≤0.30%, chromium (Cr)≤0.30%, copper (Cu)≤0.30%, arsenic (As)≤0.80%.Outside demanganization, silicon, the summation of other alloying element residual content is no more than 0.60%.

2) after oxygen top blown 10-30min, carry out LF refining 80-100min, add lime 150Kg/ stove in LF refining furnace, calcium carbide 65Kg/ stove, carries out stirring 50min simultaneously, and the slag making time is 20min;

3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 4m/min, and specific water is 1.5L/Kg, tundish temperature is 1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron;

The cast molding step of described nut is as follows:

Get above-mentioned steel billet and put into oven melting at 1300 DEG C, then in nitrogen environment, smelt is imported in mould at 700 DEG C and cools, 10min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 10min in the oil that temperature of quenching afterwards is 200 DEG C, then take out product at room temperature air cooling.

By standard GB/T/T230.1-2009 " metallic rockwell hardness test ", hardness test is carried out to the present embodiment manufacture lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present embodiment manufactures the lock nut hardness Cuprum alloy material more of the prior art of gained improves 45%.

After rubbing with sandstone, measure the loss of weight that the present embodiment manufactures the lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves abrasion resistance raising 20%.

By crackle detecting instrument, measure the cracking breakout that the present embodiment manufactures the lock nut of gained and the like product of manufacture technics gained of the prior art, the lock nut cracking breakout that the present embodiment manufactures gained reduces by 18%.

Embodiment 5

As Figure 1-4, lock nut comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber, and periphery cylindrically; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.

As shown in Figure 3-4, outer nut body cross section periphery can be Hexagon.Quadrilateral is can be in another preferred implementation ectomesoderm nut body cross section periphery of the present invention; Described multiple internal layer nut body periphery cylindrically.

As shown in Figure 4, the upper and lower surface of described multiple internal layer nut body can be provided with anti-slip veins; Lower surface and the internal surface of described outer nut body also can be provided with anti-slip veins.By described anti-slip veins, when mounted between internal layer nut and most can form enough frictional force between higher level's internal layer nut and the internal surface of outer nut, realize anti-loosing effect further.

As shown in Figure 5, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure further, and described disconnecting prevention structure is shell fragment; Multiple draw-in groove is also being provided with near head side with the bolt of the supporting installation of described nut.When described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.

As shown in Figure 6, in the manufacture method of described lock nut, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of described alloy material is as follows:

Get raw material iron and put into low frequency melting furnace at 1100 DEG C of heating 15h, then the smelt in low frequency melting furnace is placed in converter 35T oxygen top-blown converter simultaneously;

Described raw material iron is made up of pig, steel scrap, and wherein pig is the main raw material(s) of steel-making, generally accounts for 70% ~ 100% of charge weight.The chemical heat of the molten iron that pig obtains through heating and physical thermal are the main heating source of oxygen top blown converter steel making.In pig, silicon (Si) content of each element is 0.30% ~ 0.60%; Manganese (Mn) content is 0.20% ~ 0.80%; Phosphorus (P) content is lower≤and 0.20%; Sulphur (S) content≤0.05%; Carbon (C) content is 3.5% ~ 4.5%.Sulphur, the phosphorus content of steel scrap all must not be greater than 0.050%.In steel scrap, residual element content should meet following requirement: nickel (Ni)≤0.30%, chromium (Cr)≤0.30%, copper (Cu)≤0.30%, arsenic (As)≤0.80%.Outside demanganization, silicon, the summation of other alloying element residual content is no more than 0.60%.

After oxygen top blown 30min, carry out LF refining 80min, add lime 100Kg/ stove in LF refining furnace, calcium carbide 50Kg/ stove, carries out stirring 60min simultaneously, and the slag making time is 20min; Slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 4m/min, and specific water is 1.5L/Kg, tundish temperature is 1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron.

The cast molding step of described nut is as follows:

Get steel billet and put into oven melting at 1250 DEG C, then in nitrogen environment, smelt is imported in mould at 500 DEG C and cools, 13min is incubated by after product heats to 800 cooled in mould DEG C, be incubated 11min in the oil that temperature of quenching afterwards is 200 DEG C, then take out product at room temperature air cooling, obtain described lock nut.

By standard GB/T/T230.1-2009 " metallic rockwell hardness test ", hardness test is carried out to the present embodiment manufacture lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present embodiment manufactures the lock nut hardness Cuprum alloy material more of the prior art of gained improves 40%.

After rubbing with sandstone, measure the loss of weight that the present embodiment manufactures the lock nut of gained and the like product of Cuprum alloy material of the prior art, test and average for five times, the like product that the present invention manufactures the abrasion resistance Cuprum alloy material more of the prior art of the lock nut of gained improves abrasion resistance raising 18%.

By crackle detecting instrument, measure the cracking breakout that the present embodiment manufactures the lock nut of gained and the like product of manufacture technics gained of the prior art, the lock nut cracking breakout that the present embodiment manufactures gained reduces by 20%.

More than show and describe basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (10)

1. a lock nut, is characterized in that, comprises multiple internal layer nut body (101,102,103) and an outer nut body (104); Described multiple internal layer nut body center is cannulated threaded chamber; Described multiple internal layer nut body thread cavity diameter and bolt (105) diameter match; When being installed on bolt, outer nut body and the stepped installation vertically of multiple internal layer nut body from top to bottom from bolt tail direction; The internal layer nut body radius being positioned at lower floor is greater than the internal layer nut body radius being positioned at upper strata; The thickness sum of described multiple internal layer nut body is less than the radial length of bolt; When being installed on bolt, multiple internal layer nut body is completely coated by outer nut body; Described outer nut body cavity vertically section is that hollow is inverted stepped; The thickness of the corresponding every grade of internal layer nut body of the height of every layer of ladder from bottom to top vertically, the semidiameter of the corresponding every grade of internal layer nut body of ladder width; The most higher level of described outer nut body cavity is cannulated threaded chamber, and diameter and the diameter of bolt match; Described lock nut is made up of alloy material.
2. a lock nut as claimed in claim 1, outer nut body cross section periphery is Hexagon or quadrilateral; Described multiple internal layer nut body periphery cylindrically.
3. a lock nut as claimed in claim 2 or claim 3, the upper and lower surface of described multiple internal layer nut body is provided with anti-slip veins.
4. the lock nut as described in as arbitrary in claim 1-3, the lower end of described orlop internal layer nut body comprises at least one disconnecting prevention structure (501) further, and described disconnecting prevention structure is shell fragment.
5. the lock nut as described in as arbitrary in claim 1-4, is also being provided with multiple draw-in groove (502) with the bolt of the supporting installation of described nut near head side.
6. the lock nut as described in as arbitrary in claim 1-5, when described orlop internal layer nut body is installed on bolt, except being connected with bolton by screw thread, at least one disconnecting prevention structure described is engaged with the draw-in groove on bolt is unidirectional.
7. manufacture as arbitrary in claim 1-6 as described in the method for lock nut, it is characterized in that, comprise the manufacturing step of alloy material and the cast molding step of nut, the manufacturing step of wherein said alloy material is as follows:
1) get raw material iron and put into low frequency melting furnace at 1000-1200 DEG C of heating 10-15h, then the smelt in low frequency melting furnace is placed in converter 20-35T oxygen top-blown converter simultaneously;
2) after oxygen top blown 10-30min, carry out LF refining 80-100min, add lime 100-150Kg/ stove in LF refining furnace, calcium carbide 50-65Kg/ stove, carries out stirring 40-60min simultaneously, and the slag making time is 10-20min;
3) slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 3-4m/min, and specific water is 1.5L/Kg, tundish temperature is 1000-1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron;
The cast molding step of described nut is as follows:
Get above-mentioned steel billet putting into oven melting at 1200-1300 DEG C, then in nitrogen environment, imported in mould at 500-700 DEG C by smelt and cool, cooled product carries out stepped quenching process, namely obtains described lock nut after quenching.
8. the manufacture method of lock nut according to claim 7, it is characterized in that, the manufacturing step of described alloy material is as follows: get raw material iron and put into low frequency melting furnace at 1100 DEG C of heating 15h, then the smelt in low frequency melting furnace is placed in converter 35T oxygen top-blown converter simultaneously; After oxygen top blown 30min, carry out LF refining 80min, add lime 100Kg/ stove in LF refining furnace, calcium carbide 50Kg/ stove, carries out stirring 60min simultaneously, and the slag making time is 20min; Slag trap is used to tap after LF refining, carry out Argon simultaneously, molten steel after Argon carries out billet continuous casting, and pulling rate is 4m/min, and specific water is 1.5L/Kg, tundish temperature is 1250 DEG C, continuous casting becomes the steel billet of 130mm × 130mm, and the component of described steel billet is as follows: C8-10%, Cu10-15%, Mn0.8-1.2%, Si1.3-1.8%, Cr0.2-0.4%, V0.5-1.8%, P≤0.08, S≤0.08, surplus is iron.
9. the manufacture method of the lock nut according to claim 7-8, it is characterized in that, in the cast molding step of described nut, described stepped quenching process is as follows: be incubated 10-15min by after product heats to 800 cooled in mould DEG C, to quench afterwards in the oil of temperature 200-250 DEG C and to be incubated 10-13min, then taking out product at room temperature air cooling.
10. the manufacture method of the lock nut according to claim 7-9, it is characterized in that, the cast molding step of nut is as follows: get steel billet and putting into oven melting at 1250 DEG C, then in nitrogen environment, smelt is imported in mould at 500 DEG C and cools, be incubated 13min by after product heats to 800 cooled in mould DEG C, in the oil that temperature of quenching afterwards is 200 DEG C, be incubated 11min, then product at room temperature air cooling is taken out, obtained described lock nut.
CN201410462099.7A 2014-09-12 2014-09-12 A kind of stop nut and its manufacture method CN104251254B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105179435A (en) * 2015-09-18 2015-12-23 叶中洲 Novel locking nut
CN107931574A (en) * 2017-11-24 2018-04-20 盐城楷翔钻采配件有限公司 A kind of manufacturing process of nut

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307722A (en) * 1884-11-04 klemroth
US4790703A (en) * 1987-04-24 1988-12-13 Wing George S Prevailing torque fastener assembly
CN200952523Y (en) * 2006-08-30 2007-09-26 成都匡盾防护工程材料有限公司 Antitheft, dismountable locknut
CN202926831U (en) * 2012-11-20 2013-05-08 无锡创明传动工程有限公司 Locking structure of threaded connection pair
JP2014126159A (en) * 2012-12-27 2014-07-07 Yoshitaka Akino Device for preventing loosening of nut

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307722A (en) * 1884-11-04 klemroth
US4790703A (en) * 1987-04-24 1988-12-13 Wing George S Prevailing torque fastener assembly
CN200952523Y (en) * 2006-08-30 2007-09-26 成都匡盾防护工程材料有限公司 Antitheft, dismountable locknut
CN202926831U (en) * 2012-11-20 2013-05-08 无锡创明传动工程有限公司 Locking structure of threaded connection pair
JP2014126159A (en) * 2012-12-27 2014-07-07 Yoshitaka Akino Device for preventing loosening of nut

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105179435A (en) * 2015-09-18 2015-12-23 叶中洲 Novel locking nut
CN107931574A (en) * 2017-11-24 2018-04-20 盐城楷翔钻采配件有限公司 A kind of manufacturing process of nut

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