CN111350748B - Non-metal insert hexagonal flange face locking nut and manufacturing method thereof - Google Patents
Non-metal insert hexagonal flange face locking nut and manufacturing method thereof Download PDFInfo
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- CN111350748B CN111350748B CN202010200819.8A CN202010200819A CN111350748B CN 111350748 B CN111350748 B CN 111350748B CN 202010200819 A CN202010200819 A CN 202010200819A CN 111350748 B CN111350748 B CN 111350748B
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- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 150000002843 nonmetals Chemical class 0.000 title description 2
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
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- 238000002161 passivation Methods 0.000 description 14
- 238000004381 surface treatment Methods 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000002791 soaking Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
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- 238000005260 corrosion Methods 0.000 description 4
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- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
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- 230000007547 defect Effects 0.000 description 2
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- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
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- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
Abstract
The invention discloses a non-metal insert hexagonal flange face lock nut and a manufacturing method thereof, comprising a lock nut body and an insert, the locking nut body comprises a flange part, a thread part and an insert part, the flange part and the insert part are respectively positioned at two ends of the thread part, the insert is arranged in the insert part, the end surface of the flange part far away from the thread part is continuously provided with one-way extending anti-slip teeth, the extending direction of the anti-skid teeth is opposite to the screwing direction of the nut body, the inner wall of the insert part is provided with a reinforcing belt along one circumference thereof, the contour line of the cross section of the inner wall of the reinforcing belt is a wavy line, the wavy line is provided with 10 limiting convex parts and 1 positioning convex part, the minimum of spacing bellying both sides is provided with the interference muscle, the length direction of interference muscle is parallel with lock nut's central line, the outer wall of inserts is provided with the cooperation recess that agrees with the reinforcing band inner wall.
Description
Technical Field
The invention relates to the technical field of locking nuts, in particular to a locking nut with a non-metal insert hexagonal flange surface and a manufacturing method thereof.
Background
The nut is a mechanical part with internal threads and used in cooperation with the screw to transmit motion or power. In the assembly of the components, bolts and nuts are usually adopted to be matched, so that the two components are fixedly assembled together. The anti-loosening of the nut during the long-term use of the components has been an important research subject of threaded connection.
The insert slotted self-locking nut is a high vibration-resistant and anti-loose fastener, and can be used in various machine and electrical appliance parts in the fields of aviation, aerospace, machinery and the like with the working temperature of-50-100 ℃. The locking working principle is that in the process of installing the thread pair, the thread of the bolt extrudes the embedded insert of the nut body, so that the insert deforms. After the installation is finished, the bolt thread and the insert are in a complete extrusion state, and friction torque for preventing the thread from rotating is formed, so that the self-locking and anti-loosening functions are achieved.
However, in practical use, the following problems may occur: 1. when the insert is riveted, the position of the insert placed in the insert groove is not fixed and is not positioned at the central position of the nut, so that the effective blank pressing size above the offset part of the insert is smaller, or the blank pressing sizes of all parts are uneven, and the bolt easily pushes the insert out of the insert groove when the nut and the bolt are assembled, so that the insert loses the loosening effect. 2. Under the long-time use of lock nut, because receive external factor's influence, the inserts easily produces ageing and shrink, does not have spacing and fixed measure between inserts itself and the nut in addition, leads to the inserts to produce not hard up and reduce the relaxation ability. 3. The loosening measure of the prior insert slotting self-locking locknut is too single, and once the insert loses the loosening capability, the locknut loses the loosening prevention function.
Disclosure of Invention
The invention aims to provide a riveting fixture which can accurately position an insert when the insert is installed, so that the insert can be better fixed when the insert is riveted; the embedded part is limited, so that the embedded part is prevented from being loosened greatly after being used for a long time; the diversity of the loosening measures of the lock locking nut is increased, and once the insert loses the loosening capability, the lock nut still has the anti-loosening function.
The technical purpose of the invention is realized by the following technical scheme: a locking nut with a non-metal insert and a hexagonal flange surface comprises a locking nut body and an insert, wherein the locking nut body comprises a flange part, a thread part and an insert part, the flange part and the insert part are respectively positioned at two ends of the thread part, the insert is arranged in the insert part, it is characterized in that the end surface of the flange part far away from the thread part is continuously provided with a unidirectional extending antiskid tooth, the extending direction of the anti-skid teeth is opposite to the screwing direction of the nut body, the inner wall of the insert part is provided with a reinforcing belt along one circumference thereof, the contour line of the cross section of the inner wall of the reinforcing belt is a wavy line which is provided with ten limiting convex parts and one positioning convex part, the lowest part of the two sides of the limiting convex part is provided with an interference rib, the length direction of the interference rib is parallel to the central line of the locking nut, the outer wall of the insert is provided with a positioning matching groove and a ten-limiting matching groove which are matched with the inner wall of the reinforcing belt.
Through above-mentioned technical scheme, the frictional force that anti-skidding tooth can increase lock nut flange portion and bolt flange portion contact surface, and the protruding face of anti-skidding tooth offsets on the protruding face of anti-skidding tooth on the lock nut and the bolt, can effectually prevent that lock nut from loosening the slip against screwing up the direction pine, increases lock nut's locking measure, and anti-skidding tooth can make lock nut still have better locking mobility when the inserted sheet loses when loosening the function. When the insert is arranged in the insert part, the positioning matching groove on the insert corresponds to the positioning protruding part of the insert part, so that the insert is positioned at the central position of the insert part, the insert is prevented from offsetting when the insert part closes up, and the effective blank pressing size above the offset part of the insert is smaller. The limiting matching groove on the insert is filled in corresponding to the limiting protruding portion of the insert portion, so that the position limiting effect can be achieved on the insert, the insert is prevented from rotating relative to the insert portion, on one hand, threads of the bolt can be better extruded with the insert when the bolt is assembled, and in addition, when the insert shrinks after being used for a long time, the insert still cannot be loosened relative to the locking nut, so that the insert still keeps a certain loosening function.
The interference rib can enable the insert to be riveted to the insert part and then fixed more firmly, and the insert is prevented from being shrunk and loosened after being used for a long time.
The invention is further configured to: the upper surface of the anti-skidding tooth is obliquely arranged and gradually decreases along the screwing direction of the nut body, and the distance between the highest point and the lowest point of the upper surface of the anti-skidding tooth is 0.5 mm-0.8 mm.
Through the technical scheme, the convex surface of the anti-skidding tooth on the locking nut can more smoothly offset with the convex surface of the anti-skidding tooth on the bolt, so that the locking nut is effectively prevented from loosening and sliding along the screwing direction.
The invention is further configured to: and the edge of the upper surface of the anti-slip tooth is provided with a chamfer.
Through above-mentioned technical scheme, the in-process chamfer of screwing up lock nut can be convenient for lock nut's tightening, can prevent simultaneously that the edge of antiskid tooth is too sharp-pointed and cause destruction to the bolt.
The invention is further configured to: the cross section of the outer wall of the insert part is circular, the circle center of the circle is located on the central line of the locking nut, in the same horizontal cross section, the included angle formed by the lowest points on the two sides of the limiting protrusion part and the connecting line of the circle center is 30 degrees, and the included angle formed by the lowest points on the two sides of the positioning protrusion part and the connecting line of the circle center is 60 degrees.
Through above-mentioned technical scheme, 10 spacing bellying and 1 location bellying enclose into a whole circle just in time, make each position atress on inserts and the inserts portion contact surface even, strengthen the stability of inserts, prevent that local position atress is too big and damage.
The invention is further configured to: the cross section of the interference rib is in an equilateral triangle shape, the height of the equilateral triangle is 0.1 mm-0.2 mm, and the fixing surface of the interference rib and the inner wall of the reinforcing belt is one plane.
Through above-mentioned technical scheme, the outside and the contact of interference muscle sharp-pointed part of inserts when the inserts is packed into the inserts portion make the inserts more conveniently pack into the inserts portion and produce the interference with the interference muscle.
The invention is further configured to: a manufacturing method of a non-metal insert hexagonal flange face lock nut sequentially comprises the following steps:
s1) heating and rolling the steel blank;
s2) annealing treatment;
s3) acid washing;
s4) stamping and cold heading forming of steel materials;
s5) deburring;
s6) tapping and processing threads;
s7) heat treatment;
s8) grinding and cleaning;
s9) passivating and drying;
s10) carrying out physical flaw detection;
s11) surface treatment;
s12) riveting the insert;
s13) closed lubrication treatment;
s14) appearance inspection and boxing.
According to the technical scheme, the steel blank is heated, rolled and drawn to form the steel material, the steel material is heated to 500-600 ℃, and the steel material is cooled along with a furnace after heat preservation, so that the hardness of the steel material is reduced, and the cutting processability is improved; pickling to remove oxide film on the surface of metal; cold heading forming to obtain a lock nut body without internal threads; tapping to process internal threads for the locking nut; the function of loosening is played after the inserts are riveted.
The invention is further configured to: the grinding and cleaning method comprises the steps of firstly placing the locknut in a grinding roller of a centrifugal grinder, then placing grinding stones and a grinding agent, wherein the placing amount ratio of the locknut to the grinding stones is 1:1, more than 30% of space is required to be reserved in the grinding roller after the locknut and the grinding stones are all placed in the grinding roller, and then adding water into the grinding roller, wherein the height of the water surface is 4/5 of the height of the grinding roller.
Through the technical scheme, the locking nut can be fully ground, the surface precision of the locking nut is improved, and the wear resistance and the surface fatigue strength of the surface are improved.
The invention is further configured to: and in the grinding and cleaning step, after the centrifugal grinding machine continuously works for 30min, grinding is stopped, water and grinding agents in the grinding roller are replaced, the rotating direction of the centrifugal grinding machine is replaced, and then grinding is continued for 30 min.
Through above-mentioned technical scheme, prevent that the process of lapping from leading to the grinding cylinder inside high temperature for a long time, can further improve grinding quality after changing water and the abrasive simultaneously.
The invention is further configured to: the passivation solution used in the passivation drying step is stainless iron passivation solution ID4000, the passivation temperature is 30-40 ℃, the passivation time is 30-120 min, and after passivation is completed, drying is carried out in a dryer, the drying temperature is 80-90 ℃, and the drying time is 15-20 min.
Through the technical scheme, the passivation can enable the surface of the lock nut to form the protective film, and the corrosion resistance of the lock nut is improved.
The invention is further configured to: the surface treatment method comprises the steps of mixing deionized water, zinc sheets, aluminum sheets and chromic acid to prepare surface treatment liquid, then soaking a locking nut in the surface treatment liquid for 40-60 s, spin-drying and baking in centrifugal equipment after soaking is completed, wherein the baking temperature is 200-300 ℃, the baking time is 30-40 min, then soaking the locking nut in the surface treatment liquid for the second time, the soaking time is 20-30 s, spin-drying and baking in the centrifugal equipment after soaking is completed, and the baking temperature is 300-350 ℃, and the baking time is 40-60 min.
Through the technical scheme, the protective layer formed by the surface treatment liquid prevents corrosive media such as water, oxygen and the like from reaching the surface of the locking nut, so that an isolation effect is achieved; the surface treatment liquid reacts with the locknut to generate a compact passive film, so that the corrosion resistance of the locknut is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a lock nut body according to the present invention;
FIG. 4 is a schematic view showing an internal structure of a body of a lock nut according to the present invention;
FIG. 5 is a schematic view of the insert of the present invention;
FIG. 6 is a side view of the present invention;
FIG. 7 is a cross-sectional view taken along direction A of FIG. 6 in accordance with the present invention;
fig. 8 is a flowchart of a manufacturing method of the lock nut of the present invention.
The reference numbers in the figures mean: 1. a lock nut body; 2. an insert; 3. a flange portion; 4. a threaded portion; 5. an insert part; 6. anti-slip teeth; 7. a reinforcing band; 8. a limiting bulge part; 9. a positioning boss; 10. interference ribs; 11. positioning the matching groove; 12. and limiting and matching the groove.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The present invention is explained below with reference to fig. 1 to 8.
The utility model provides a non-metal inserts hexagonal flange face lock nut, includes lock nut body 1 and inserts 2, lock nut body 1 includes flange portion 3, screw thread portion 4 and inserts portion 5, and flange portion 3 and inserts portion 5 are located the both ends of screw thread portion 4 respectively, and inserts 2 sets up inside inserts portion 5, and screw thread and inserts 2 on the bolt are in the complete extrusion state when lock nut and bolt assembly, form the rotatory friction torque of prevention screw thread to reach the locking function of auto-lock.
The flange portion 3 is kept away from on the terminal surface of screw portion 4 continuous arrangement have one-way extension antiskid tooth 6, and the extending direction of antiskid tooth 6 is opposite with the direction of twisting of nut body, and the upper surface slope of antiskid tooth 6 sets up and reduces along the direction of twisting of nut body gradually, and the distance between the upper surface peak of antiskid tooth 6 and the minimum is 0.5mm ~0.8 mm. The anti-skidding teeth 6 can increase the frictional force of the contact surface of the flange part 3 of the locking nut and the flange part 3 of the bolt, and the convex surfaces of the anti-skidding teeth 6 on the locking nut and the convex surfaces of the anti-skidding teeth 6 on the bolt are abutted, so that the locking nut can be effectively prevented from loosening and sliding along the screwing direction.
The upper surface edge of antiskid tooth 6 is provided with the chamfer, and the in-process chamfer of screwing up lock nut can be convenient for lock nut's tightening, can prevent simultaneously that the edge of antiskid tooth 6 is too sharp-pointed and cause destruction to the bolt.
The inner wall of the insert part 5 is provided with a reinforcing belt 7 along one circumference, the section contour line of the inner wall of the reinforcing belt 7 is a wavy line, the wavy line is provided with ten limiting convex parts 8 and one positioning convex part 9, and the outer wall of the insert 2 is provided with a positioning matching groove 11 and ten limiting matching grooves 12 which are matched with the inner wall of the reinforcing belt 7.
When the insert 2 is installed in the insert part 5, the positioning matching groove 11 on the insert 2 corresponds to the positioning convex part 9 of the insert part 5, so that the insert 2 is positioned at the central position of the insert part 5, and the phenomenon that the effective blank pressing size above the offset part insert 2 is smaller due to offset of the insert 2 when the insert part 5 is closed up is prevented. The spacing cooperation recess 12 on the inserts 2 is packed into and can be played the position to inserts 2 and prescribe a limit to the effect corresponding to the spacing bellying 8 of inserts portion 5, prevents that inserts 2 from having relative rotation for inserts portion 5, makes the screw thread of bolt can be better when assembly bolt extrude with inserts 2 mutually on the one hand, and when inserts 2 shrink after long-time the use in addition, inserts 2 still can not take place not hard up for lock nut, makes inserts 2 still keep certain function of relaxing.
The cross section of the outer wall of the insert part 5 is circular, the circle center of the circle is on the central line of the lock nut, in the same horizontal cross section, the included angle formed by the connecting line of the lowest point of the two sides of the limiting protrusion part 8 and the circle center of the circle is 30 degrees (angle 2 in figure 7), and the included angle formed by the connecting line of the lowest point of the two sides of the positioning protrusion part 9 and the circle center of the circle is 60 degrees (angle 1 in figure 7). 10 spacing bellying 8 and 1 location bellying 9 just in time enclose into a whole circle, make each position atress on inserts 2 and the 5 contact surfaces of inserts part even, strengthen inserts 2's stability, prevent that local position atress is too big and damage.
The lowest position of 8 both sides of spacing bellying is provided with interference muscle 10, and the length direction of interference muscle 10 is parallel with lock nut's central line, and interference muscle 10's cross sectional shape is equilateral triangle, and equilateral triangle's height is 0.1mm ~0.2mm, and the stationary plane of interference muscle 10 and reinforcing band 7 inner wall is one of them plane. The interference rib 10 can fix the insert 2 after being riveted to the insert part 5 more firmly, and prevent the insert 2 from being shrunk and loosened after being used for a long time. The outside of the insert 2 comes into contact with the sharp portion of the interference rib 10 when the insert 2 is fitted into the insert portion 5, so that the insert 2 is more easily fitted into the insert portion 5 and interferes with the interference rib 10.
A manufacturing method of a non-metal insert 2 hexagonal flange face lock nut sequentially comprises the following steps:
s1) heating, rolling and drawing the steel blank.
S2) annealing treatment: the steel material is heated to 500-600 ℃, and is cooled along with the furnace after heat preservation, so that the hardness of the steel material is reduced, and the machinability is improved.
S3) acid washing: the steel material after drawing is immersed in an aqueous solution of sulfuric acid to remove thin films such as oxides on the metal surface.
S4) steel material stamping and cold heading forming: the steel material is extruded by a cold header and pressed into a lock nut body comprising a flange part 3, a thread part 4 and an insert part 5, wherein the inner wall of the thread part 4 is not provided with threads.
S5) deburring: the burrs on the surface and the inner wall of the lock nut body 1 are removed, and the phenomenon that the burrs affect the tapping quality when the next process taps the thread part 4 is avoided.
S6) tapping threads: and machining an internal thread on the inner wall of the locking nut on a machine tool.
S7) heat treatment: and (3) putting the nut into a preheating furnace, controlling the temperature to be 200-300 ℃, raising the temperature to 500 ℃ at the rate of 50 ℃ per hour, keeping for 2-3 hours, and carrying out heat treatment to enable the internal structure of the metal to reach or approach a balanced state so as to obtain good process performance and use performance.
S8) grinding and cleaning; the grinding and cleaning method comprises the steps of firstly placing the nut in a grinding roller of a centrifugal grinder, then placing grinding stones and a grinding agent, wherein the placing amount ratio of the nut to the grinding stones is 1:1, more than 30% of space is required to be reserved in the grinding roller after the nut and the grinding stones are completely placed, and then adding water into the grinding roller, wherein the water level is 4/5 of the height of the grinding roller. And in the grinding and cleaning step, after the centrifugal grinding machine continuously works for 30min, grinding is stopped, water and grinding agents in the grinding roller are replaced, the rotating direction of the centrifugal grinding machine is replaced, and then grinding is continued for 30 min. The locking nut can be fully ground, the surface precision of the locking nut is improved, and the wear resistance and the surface fatigue strength of the surface are improved.
S9) passivating and drying; the passivation solution used in the passivation drying step is stainless iron passivation solution ID4000, the passivation temperature is 30-40 ℃, the passivation time is 30-120 min, and after passivation is completed, drying is carried out in a dryer, the drying temperature is 80-90 ℃, and the drying time is 15-20 min. Passivation can make lock nut surface form the protective film, increases lock nut's corrosion resisting property.
S10) physical flaw detection: and (3) carrying out physical flaw detection on the locking screw by using an ultrasonic flaw detection method, and detecting whether cracks or defects exist in the interior of the tightening screw, so that a product with quality defects can be found in time.
S11) surface treatment; the surface treatment method comprises the steps of mixing deionized water, zinc sheets, aluminum sheets and chromic acid to prepare surface treatment liquid, then soaking a locking nut in the surface treatment liquid for 40-60 s, spin-drying and baking in centrifugal equipment after soaking is completed, wherein the baking temperature is 200-300 ℃, the baking time is 30-40 min, then soaking the locking nut in the surface treatment liquid for the second time, the soaking time is 20-30 s, spin-drying and baking in the centrifugal equipment after soaking is completed, the baking temperature is 300-350 ℃, and the baking time is 40-60 min. The protective layer formed by the surface treatment liquid prevents corrosive media such as water, oxygen and the like from reaching the surface of the locking nut, thereby playing an isolation role; the surface treatment liquid reacts with the locknut to generate a compact passive film, so that the corrosion resistance of the locknut is improved.
S12) riveting the insert 2: the positioning matching groove 11 on the insert 2 is arranged corresponding to the positioning bulge 9 of the insert 5 part 5, and then the upper end of the insert part 5 is closed to fix the insert 2 at the central position of the insert part 5.
S13) closed lubrication treatment; lithium grease is smeared on the surface of the locknut, so that the functions of rust prevention and lubrication are achieved.
S14) appearance inspection and boxing.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.
Claims (3)
1. A hexagonal flange face locking nut with a non-metal insert comprises a locking nut body (1) and an insert (2), wherein the locking nut body (1) comprises a flange portion (3), a threaded portion (4) and an insert portion (5), the flange portion (3) and the insert portion (5) are respectively located at two ends of the threaded portion (4), and the insert (2) is arranged inside the insert portion (5), and the hexagonal flange face locking nut is characterized in that one-way extending anti-skidding teeth (6) are continuously arranged on the end face, far away from the threaded portion (4), of the flange portion (3), the extending direction of the anti-skidding teeth (6) is opposite to the screwing direction of the nut body, a reinforcing band (7) is arranged on the inner wall of the insert portion (5) along one circumference of the inner wall, the contour line of the cross section of the inner wall of the reinforcing band (7) is a wavy line, and the wavy line comprises ten limiting convex portions (8) and a positioning convex portion (9), the lowest positions of two sides of the limiting protruding portions (8) are provided with interference ribs (10), the length directions of the interference ribs (10) are parallel to the central line of the locking nut, the cross section of each interference rib (10) is in an equilateral triangle shape, the height of the equilateral triangle is 0.1 mm-0.2 mm, the fixing surfaces of the interference ribs (10) and the inner wall of the reinforcing band (7) are one plane, when the insert (2) is installed in the insert portion (5), the outer portion of the insert (2) is in contact with the sharp portions of the interference ribs (10), so that the insert (2) is more conveniently installed in the insert portion (5) and generates interference with the interference ribs (10), the outer wall of the insert (2) is provided with a positioning matching groove (11) and a ten limiting matching groove (12) which are matched with the inner wall of the reinforcing band (7), the cross section of the outer wall of the insert portion (5) is circular, and the circle center of the circle is on the central line of the locking nut, in the same horizontal section, the included angle formed by the lowest points on the two sides of the limiting convex part (8) and the connecting line of the circle center is 30 degrees, and the included angle formed by the lowest points on the two sides of the positioning convex part (9) and the connecting line of the circle center is 60 degrees.
2. The non-metallic insert hexagonal flange face locking nut of claim 1, wherein: the upper surface of the anti-skidding teeth (6) is obliquely arranged and gradually reduced along the screwing direction of the nut body, and the distance between the highest point and the lowest point of the upper surface of the anti-skidding teeth (6) is 0.5-0.8 mm.
3. The non-metallic insert hexagonal flange face locking nut of claim 2, wherein: and the edge of the upper surface of the anti-slip tooth (6) is provided with a chamfer.
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| CN202010200819.8A CN111350748B (en) | 2020-03-20 | 2020-03-20 | Non-metal insert hexagonal flange face locking nut and manufacturing method thereof |
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| CN111283436B (en) * | 2020-03-20 | 2021-02-05 | 海盐沛泓汽车零部件有限公司 | Hexagonal locking nut production line with insert capable of being positioned |
| CN114310197A (en) * | 2022-02-14 | 2022-04-12 | 襄阳协德精密机械有限公司 | Copper nut machining process |
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| CN109894813A (en) * | 2019-02-20 | 2019-06-18 | 海盐兆丰紧固件有限公司 | A kind of manufacturing process of nut |
| CN109899367A (en) * | 2019-04-17 | 2019-06-18 | 海盐宏茂五金制品有限公司 | A kind of anti-loosening fastening type flange nut |
| CN209340310U (en) * | 2018-11-28 | 2019-09-03 | 上海用一精密五金制品有限公司 | Non-metallic insert hexagonal locking nut |
| CN209671387U (en) * | 2018-12-28 | 2019-11-22 | 苏州誉高紧固系统有限公司 | A kind of stop nut with interior edge lock washer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014066268A (en) * | 2012-09-25 | 2014-04-17 | Sumitomo Forestry Co Ltd | Nut |
| CA3042372A1 (en) * | 2016-10-20 | 2018-04-26 | Ramco Specialties, Inc. | Low profile nylon insert lock nut |
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|---|---|---|---|---|
| CN209340310U (en) * | 2018-11-28 | 2019-09-03 | 上海用一精密五金制品有限公司 | Non-metallic insert hexagonal locking nut |
| CN209671387U (en) * | 2018-12-28 | 2019-11-22 | 苏州誉高紧固系统有限公司 | A kind of stop nut with interior edge lock washer |
| CN109894813A (en) * | 2019-02-20 | 2019-06-18 | 海盐兆丰紧固件有限公司 | A kind of manufacturing process of nut |
| CN109899367A (en) * | 2019-04-17 | 2019-06-18 | 海盐宏茂五金制品有限公司 | A kind of anti-loosening fastening type flange nut |
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