CN109604943A - A kind of screw rod processing technology and process equipment - Google Patents
A kind of screw rod processing technology and process equipment Download PDFInfo
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- CN109604943A CN109604943A CN201811403946.7A CN201811403946A CN109604943A CN 109604943 A CN109604943 A CN 109604943A CN 201811403946 A CN201811403946 A CN 201811403946A CN 109604943 A CN109604943 A CN 109604943A
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
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- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/44—Carburising
- C23C8/46—Carburising of ferrous surfaces
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention relates to screw-rod manufacturing technology field, in particular to a kind of screw rod processing technology and process equipment not only have higher hardness using the screw rod that the processing technology produces, while the damping capacity of workpiece itself is promoted, and the application range of workpiece is made to be expanded.Its technology point includes S1: sorting；S2: forging obtains round bar shape steel；S3: heat treatment, concrete technology successively include annealing, and normalizing quenches for the first time, high tempering, carburizing, secondary quenching, lonneal；S4: end face milling；S5: drill centers；S6: the steel after S5 step process are placed in rolling screw-threads mold by milling spiral chute, and are positioned using positioning tool, and rolling screw-threads operation is carried out；S7: two end chamfers of milling obtain finished product.
Description
Technical field
The invention belongs to screw-rod manufacturing technology field, in particular to a kind of screw rod processing technology and process equipment.
Background technique
Screw rod is main part and key component in mechanical part, and working environment is rotated under high speed, high pressure, high temperature,
The tension that has had therefore, it is necessary to screw rod, bending resistance, fatigue resistance, not only want hardness high abrasion also to want good toughness, widely distributed
In various industries such as automobile, metallurgy, machinery, petroleum, electric power, building materials, ships, part industry also requires screw rod to have preferable damping
Vibration and noise reducing function.In industry, the processing of long bolt is always to compare stubborn problem in turning.The reason is that elongated screw rod is rigid
Property is poor, and work in-process easily deforms, and keeps the screw rod error processed big, is not easy to guarantee the processing quality of part.And in turning
It is improper that there is also clampings in long bolt, it is easy to because the effect of cutting force and gravity occurs bending and deformation, vibration is generated, thus shadow
Ring machining accuracy and surface roughness.
Summary of the invention
The object of the present invention is to provide a kind of screw rod processing technology and process equipment, the screw rod produced using the processing technology
Not only there is higher hardness, while the damping capacity of workpiece itself is promoted, the application range of workpiece is made to be expanded.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of screw rod processing technology, comprising the following steps:
S1: sorting；
S2: forging obtains round bar shape steel；
S3: heat treatment, concrete technology successively include annealing, and normalizing quenches for the first time, high tempering, carburizing, secondary quenching,
Lonneal；
S4: end face milling；
S5: drill centers；
S6: the steel after S5 step process are placed in rolling screw-threads mold by milling spiral chute, and utilize positioning work
Position is set, rolling screw-threads operation is carried out；
S7: two end chamfers of milling obtain finished product.
Further, annealing temperature is 680-710 DEG C in step S3.
Further, normalizing temperature is 740-780 DEG C in step S3.
Further, hardening heat is 760-780 DEG C for the first time in step S3.
Further, carburizing liquid is acetone in step S3, and ammonium molybdate is dissolved in carburizing liquid.
Further, it is 760-800 DEG C that twice quenched process, which includes hardening heat, in step S3, and Quench is extremely in the oil
330-350 DEG C, this process recycles 3 times.
Further, low tempering temperatures are 150-180 DEG C in step S3.
A kind of screw rod process equipment, including rolling screw-threads mold, further include positioning tool, and the positioning tool includes being located at
Bar shaped guide rail below the rolling screw-threads mold, the bar shaped rail crown are equipped with support plate, run through the bar shaped guide rail water
Flat to be equipped with adjustment screw, the adjustment screw is threadedly coupled with the bar shaped guide rail, and the both ends of the adjustment screw respectively with
Stud location rotation connection.
Further, the positioning tool further includes the positioning screw being threadedly coupled with the bar shaped guiding cheekn, and every
One positioning screw is extended through and is threadedly coupled with positioning column
Further, the support plate is detachably connected with the bar shaped guide rail.
The beneficial effects of the present invention are:
1. screw rod processing technology of the invention, in secondary quenching by the way of multiple fractionation quenching, experimental result card
Bright heating repeatedly, oily cold processing method can promote conversion of the austenite to martensite in Steel material repeatedly, improve Steel material
Damping capacity expand the application range and practical application effect of Steel material to improve the vibration damping of Steel material, de-noising effect.
2. although the processing mode of multiple fractionation quenching can be improved the damping capacity of Steel material, but also increase steel simultaneously
The hot cracking tendency of material, aggravates segregation phenomena.And by the way that ammonium molybdate is added in carburizing liquid in the present invention, so that activated carbon is former
Son and Mo atom penetrate into Steel material, and Mo element can reduce alloy absolute retract amount and phase in effective crystallization range
The occurrence of becoming, expanding effective crystallization range, improve polygonization activation energy, alleviate polygonization crack reduces hot tearing and inclines
To.
3. the positioning tool that can be moved left and right is arranged in the present invention, thus when processing to workpiece, it is only necessary to turn
It is dynamic that the rolling of bar shaped screw rod opposite thread can be driven with stud location rotation connection, the adjustment screw being threadedly coupled with bar shaped guide rail
Mold is mobile, carries out the adjustment of micro- a small range, to adjust the position of support plate, is supported to workpiece to be processed.
4. by the way that positioning screw is arranged in bar shaped guide rail two sides in the present invention, in this way, bar shaped is led by adjusting screw rod
Rail is adjusted to suitable position, screws positioning screw, is threadedly coupled positioning screw with bar shaped guide rail, meanwhile, positioning screw with
Positioning column is threadedly coupled, and realizes the abutting to bar shaped guide rail and locking, and bar shaped guide rail is avoided to only rely on adjustment screw locking, locking
Effect is poor.
5. in the present invention, moveable support column is axially arranged along it in bar shaped guide upper, thus, to longer workpiece
When being processed, it can use support column and the both ends of workpiece be supported, avoid workpiece under both ends under self gravitation effect
It hangs down, influences processing effect.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of screw rod process equipment overall structure diagram of the present invention, is mainly used for showing the position of support plate；
Fig. 2 is a kind of screw rod process equipment overall structure diagram of the present invention, is mainly used for showing the position of positioning screw
Structure.
In figure, 1, base station；2, rolling screw-threads mold；21, pressure roller；22, upperpush rod；3, bar shaped guide rail；4, supporting table；41,
Support plate；5, slippage slot；6, support column；7, adjustment screw；71, column；8, positioning screw；81, positioning column.
Specific embodiment
Below in conjunction with specific embodiment, technical solution of the present invention is clearly and completely described.Obviously, it is retouched
The embodiment stated is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention
The range of protection.
It is specific as follows present invention firstly provides a kind of screw rod process equipment.
Referring to Figures 1 and 2, including the rolling screw-threads mold 2 being mounted on base station 1, rolling screw-threads mold 2 includes two phases
Pair pressure roller 21 and upperpush rod 22 right above two pressure rollers 21 and other be drivingly connected structures, which is application
People directly buys, and it is the prior art known in this field, and this will not be repeated here, only simple signal in attached drawing.In two pressure rollers
21 lower section middle position is movably installed with a bar shaped guide rail 3 along the axial direction of pressure roller 21, and 3 top surface of bar shaped guide rail is locked by stud
Surely there is a supporting table 4, a vertical support plate 41 is removably connected with by horizontal stud at the top of supporting table 4, for to be added
The bottom surface of work workpiece is supported.It when work pieces process, is placed between two pressure rollers 21, the bottom surface of workpiece utilizes support plate 41
Support, the top surface of workpiece are pushed down and are limited using upperpush rod 22, and two pressure rollers 21 rotate, and squeeze workpiece and in Workpiece periphery face shape
At screw thread.
When the workpiece to different-diameter is processed, can by replace various sizes of support plate 41 come to workpiece into
Row support, to guarantee that the top surface of support plate 41 can be contacted with workpiece, is supported workpiece and limits.
Referring to Figures 1 and 2,3 top surface of bar shaped guide rail is provided with inverted T shaped slippage slot 5, the bottom end insertion of support column 6 along its axial direction
In slippage slot 5, and the bottom end of support column 6 is in the inverted T-type structure cooperated with slippage slot 5, and the end thread is connected with nut, spiral shell
Female diameter is greater than the bore of slippage slot 5, so as to which support column 6 to be locked on bar shaped guide rail 3.In the work to different length
When part is processed, the position of support column 6 can be moved, so that support column 6 is supported the end of workpiece, avoids workpiece
Longer, end is sagging under self gravitation effect, influences processing effect.
Referring to Figures 1 and 2, in one end of pressure roller 21, level is provided with an adjustment screw 7 through bar shaped guide rail 3, adjusts
Screw rod 7 is threadedly coupled with bar shaped guide rail 3, and at the both ends of adjustment screw 7, is fixedly connected vertically with base station 1 there are two column 71,
The both ends of adjustment screw 7 extend through 71 top of column, and connect with 71 locating rotation of column, i.e. adjustment screw 7 and column 71
Relative position it is constant, but adjustment screw 7 can along its own axially rotate, to adjust the position of bar shaped guide rail 3.
Referring to Figures 1 and 2, it is arranged in parallel positioned at the two sides of bar shaped guide rail 3 with adjustment screw 7 in the other end of pressure roller 21
Have positioning screw 8, be correspondingly provided with positioning column 81 with positioning screw 8, positioning screw 8 through positioning column 81 and with 81 spiral shell of positioning column
Line connection, meanwhile, positioning screw 8 can partially protrude into 3 side wall of bar shaped guide rail, be threadedly coupled with bar shaped guide rail 3, thus to bar shaped
After the position of guide rail 3 determines, bar shaped guide rail 3 can be locked using positioning threads, avoid 3 double swerve of bar shaped guide rail.
The present invention also provides a kind of screw rod processing technology, each embodiment specific as follows.
Embodiment 1
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 680 DEG C, keeps the temperature 2h, is furnace-cooled to 500
℃.Then normalizing is heated to 760 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 760 DEG C, keeps the temperature 1h, and oil is cooled to 300 DEG C.It is high
Temperature tempering, temperature are 350 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone, and are 0.5mol/L dissolved with concentration in acetone
Ammonium molybdate.Carburizing temperature is 900 DEG C, and the soaking time in terms of 0.15-0.2mm/h, dropping liquid amount is 35-65 drop/minute, when carburizing
Between be 5h.Direct secondary quenching after carburizing, secondary quenching are specially cooled to 760 DEG C using the quenching mode repeatedly recycled in advance, protect
Warm 1h, Quench keeps the temperature 70 minutes to 330 DEG C in No. 40 mechanical quenching oils；760 DEG C are again heated to, 1h, No. 40 mechanical quenchings are kept the temperature
Quench keeps the temperature 70 minutes to 330 DEG C in oil；It is again heated to 760 DEG C, keeps the temperature 1h, Quench is to after 330 DEG C in No. 40 mechanical quenching oils
It is air-cooled.Last lonneal, tempering temperature are 170 DEG C, keep the temperature 100 minutes, air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Embodiment 2
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 700 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 740 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 770 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 360 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone, and are 0.3mol/L dissolved with concentration in acetone
Ammonium molybdate.Carburizing temperature is 910 DEG C, and the soaking time in terms of 0.15-0.2mm/h, dropping liquid amount is 35-65 drop/minute, when carburizing
Between be 5h.Direct secondary quenching after carburizing, secondary quenching are specially cooled to 780 DEG C using the quenching mode repeatedly recycled in advance, protect
Warm 1h, Quench keeps the temperature 70 minutes to 340 DEG C in No. 40 mechanical quenching oils；780 DEG C are again heated to, 1h, No. 40 mechanical quenchings are kept the temperature
Quench keeps the temperature 70 minutes to 340 DEG C in oil；It is again heated to 780 DEG C, keeps the temperature 1h, Quench is to after 330 DEG C in No. 40 mechanical quenching oils
It is air-cooled.Last lonneal, tempering temperature are 150 DEG C, keep the temperature 100 minutes, air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Embodiment 3
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 710 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 780 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 780 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 360 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone, and are 0.3mol/L dissolved with concentration in acetone
Ammonium molybdate.Carburizing temperature is 910 DEG C, and the soaking time in terms of 0.15-0.2mm/h, dropping liquid amount is 35-65 drop/minute, when carburizing
Between be 5h.Direct secondary quenching after carburizing, secondary quenching are specially cooled to 800 DEG C using the quenching mode repeatedly recycled in advance, protect
Warm 1h, Quench keeps the temperature 70 minutes to 350 DEG C in No. 40 mechanical quenching oils；800 DEG C are again heated to, 1h, No. 40 mechanical quenchings are kept the temperature
Quench keeps the temperature 70 minutes to 350 DEG C in oil；It is again heated to 800 DEG C, keeps the temperature 1h, Quench is to after 350 DEG C in No. 40 mechanical quenching oils
It is air-cooled.Last lonneal, tempering temperature are 180 DEG C, keep the temperature 100 minutes, air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Embodiment 4
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 720 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 770 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 770 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 380 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone, and are 0.6mol/L dissolved with concentration in acetone
Ammonium molybdate.Carburizing temperature is 910 DEG C, and the soaking time in terms of 0.15-0.2mm/h, dropping liquid amount is 35-65 drop/minute, when carburizing
Between be 5h.Direct secondary quenching after carburizing, secondary quenching are specially cooled to 790 DEG C using the quenching mode repeatedly recycled in advance, protect
Warm 1h, Quench keeps the temperature 70 minutes to 330 DEG C in No. 40 mechanical quenching oils；790 DEG C are again heated to, 1h, No. 40 mechanical quenchings are kept the temperature
Quench keeps the temperature 70 minutes to 350 DEG C in oil；It is again heated to 790 DEG C, keeps the temperature 1h, Quench is to after 350 DEG C in No. 40 mechanical quenching oils
It is air-cooled.Last lonneal, tempering temperature are 180 DEG C, keep the temperature 100 minutes, air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Comparative example 1
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 720 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 770 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 770 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 380 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone.Carburizing temperature is 910 DEG C, with 0.15-
0.2mm/h counts soaking time, and dropping liquid amount is 35-65 drop/minute, carburizing time 5h.Direct secondary quenching after carburizing, specially
It is cooled to 790 DEG C in advance, keeps the temperature 1h, Quench is air-cooled after heat preservation 70 minutes to 330 DEG C in No. 40 mechanical quenching oils.Last lonneal,
Tempering temperature is 180 DEG C, keeps the temperature 100 minutes, air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Comparative example 2
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 710 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 780 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 780 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 360 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone.Carburizing temperature is 910 DEG C, with 0.15-
0.2mm/h counts soaking time, and dropping liquid amount is 35-65 drop/minute, carburizing time 5h.Direct secondary quenching, secondary to quench after carburizing
Fire is specially cooled to 800 DEG C using the quenching mode that repeatedly recycles in advance, keeps the temperature 1h, and Quench is to 350 in No. 40 mechanical quenching oils
DEG C, keep the temperature 70 minutes；800 DEG C are again heated to, keeps the temperature 1h, Quench keeps the temperature 70 minutes to 350 DEG C in No. 40 mechanical quenching oils；Again
It is heated to 800 DEG C, keeps the temperature 1h, Quench is to air-cooled after 350 DEG C in No. 40 mechanical quenching oils.Last lonneal, tempering temperature are
180 DEG C, 100 minutes are kept the temperature, it is air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Comparative example 3
S1: sorting.85Cr structural alloy steel is selected, round bar is as raw material.
S2: forging, in lathe cutting processing, obtaining length is 50cm, and diameter is the round bar shape steel of 5cm.
S3: heat treatment.It puts the workpiece in electric furnace, heating anneal, annealing temperature is 700 DEG C, keeps the temperature 2h, is furnace-cooled to 510
℃.Then normalizing is heated to 770 DEG C, keeps the temperature 3h, air-cooled.It quenches for the first time, temperature is 770 DEG C, keeps the temperature 1h, and oil is cooled to 330 DEG C.It is high
Temperature tempering, temperature are 360 DEG C, keep the temperature 3h, air-cooled.Carburizing, carburizing liquid are acetone.Carburizing temperature is 910 DEG C, with 0.15-
0.2mm/h counts soaking time, and dropping liquid amount is 35-65 drop/minute, carburizing time 5h.Direct secondary quenching, secondary to quench after carburizing
Fire is specially cooled to 800 DEG C using the quenching mode that repeatedly recycles in advance, keeps the temperature 1h, and Quench is to 350 in No. 40 mechanical quenching oils
DEG C, keep the temperature 70 minutes；790 DEG C are again heated to, keeps the temperature 1h, Quench keeps the temperature 70 minutes to 350 DEG C in No. 40 mechanical quenching oils；Again
It is heated to 800 DEG C, keeps the temperature 1h, Quench is to air-cooled after 350 DEG C in No. 40 mechanical quenching oils.Last lonneal, tempering temperature are
180 DEG C, 100 minutes are kept the temperature, it is air-cooled.
S4: the round bar after Overheating Treatment is put into lathe and carries out the milling operation of screw rod end face by end face milling.
S5: drill centers, by end face milling, treated that round bar puts carries out drill centers operation to drilling machine.
S6: the steel after S5 step process are placed in rolling screw-threads mold 2 by milling spiral chute, screw adjustment spiral shell
Bar 7 adjusts the position of bar shaped guide rail 3, abuts support plate 41 with round bar bottom surface, is suppressed above round bar with upperpush rod 22,
Rolling screw-threads operation is carried out later.
S7: finally round bar is put to lathe, two end chamfers is milled, obtains finished product.
Detection method
Workpiece surface slight crack: range estimation judgement, had according to fracture strength it is weak to being followed successively by nothing by force, it is faint, have, significantly.
Mechanical property: GBT 228.1-2010 tension test and GBT 229-2007 impact test are tested.
Damping capacity tan δ: compulsive vibration experimental test is carried out by Dynamic Mechanical Analyzer DMA-Q800.
| Number | Tensile strength/MPa | Impact flexibility (AKU)/J | tanδ | Hardness/HB | Alligatoring |
| Embodiment 1 | 637 | 106 | 0.042 | 360 | It is faint |
| Embodiment 2 | 640 | 105 | 0.041 | 387 | Nothing |
| Embodiment 3 | 629 | 108 | 0.042 | 389 | Nothing |
| Embodiment 4 | 637 | 112 | 0.039 | 363 | Nothing |
| Comparative example 1 | 460 | 70 | 0.009 | 268 | It is faint |
| Comparative example 2 | 480 | 80 | 0.040 | 270 | Significantly |
| Comparative example 3 | 450 | 75 | 0.034 | 280 | Significantly |
By above-mentioned experimental result it is found that being directed to damping capacity, compared by comparative example 1 with comparative example 2,3, comparative example 2 and right
Than 3 when carrying out secondary quenching, it is all made of the mode of multiple circulating quenching, the damping capacity of Steel material is obviously improved after processing,
But the alligatoring of Steel material that comparative example 2 and comparative example 3 obtain is more serious.Pass through comparative example 2, comparative example 3 and embodiment
1 to 4 compares, and embodiment 1 to 4 is due to increasing ammonium molybdate in carburizing liquid in carburization step, so that material is repeatedly followed again
After ring quenching, alligatoring phenomenon obviously weakens.
Claims (10)
1. a kind of screw rod processing technology, which comprises the following steps:
S1: sorting；
S2: forging obtains round bar shape steel；
S3: heat treatment, concrete technology successively include annealing, and normalizing quenches for the first time, high tempering, carburizing, secondary quenching, low temperature
Tempering；
S4: end face milling；
S5: drill centers；
S6: the steel after S5 step process are placed in rolling screw-threads mold (2) by milling spiral chute, and utilize positioning work
Position is set, rolling screw-threads operation is carried out；
S7: two end chamfers of milling obtain finished product.
2. a kind of screw rod processing technology according to claim 1, it is characterised in that: annealing temperature is 680- in step S3
710℃。
3. a kind of screw rod processing technology according to claim 1, it is characterised in that: normalizing temperature is 740- in step S3
780℃。
4. a kind of screw rod processing technology according to claim 1, it is characterised in that: hardening heat is for the first time in step S3
760-780℃。
5. a kind of screw rod processing technology according to claim 1, it is characterised in that: carburizing liquid is acetone in step S3, and
Ammonium molybdate is dissolved in carburizing liquid.
6. a kind of screw rod processing technology according to claim 1, it is characterised in that: twice quenched process packet in step S3
Including hardening heat is 760-800 DEG C, and to 330-350 DEG C, this process recycles 3 times Quench in the oil.
7. a kind of screw rod processing technology according to claim 1, it is characterised in that: low tempering temperatures are in step S3
150-180℃。
8. a kind of screw rod process equipment, including rolling screw-threads mold (2), it is characterised in that: it further include positioning tool, the positioning
Tooling includes the bar shaped guide rail (3) below the rolling screw-threads mold (2), is equipped with support at the top of the bar shaped guide rail (3)
Plate (41), it is horizontal equipped with adjustment screw (7), the adjustment screw (7) and the bar shaped guide rail through the bar shaped guide rail (3)
(3) it is threadedly coupled, and the both ends of the adjustment screw (7) are connect with column (71) locating rotation respectively.
9. a kind of screw rod process equipment according to claim 8, it is characterised in that: the positioning tool further include with it is described
The positioning screw (8) of bar shaped guide rail (3) sidewall thread connection, and each positioning screw (8) extends through and and positioning column
(81) it is threadedly coupled.
10. a kind of screw rod process equipment according to claim 8 or claim 9, it is characterised in that: the support plate (41) with it is described
Bar shaped guide rail (3) is detachably connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811403946.7A CN109604943A (en) | 2018-11-23 | 2018-11-23 | A kind of screw rod processing technology and process equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811403946.7A CN109604943A (en) | 2018-11-23 | 2018-11-23 | A kind of screw rod processing technology and process equipment |
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| CN109604943A true CN109604943A (en) | 2019-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648275A (en) * | 2020-12-16 | 2021-04-13 | 湖北友谦汽车零部件有限公司 | Fastening bolt for automobile and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB584111A (en) * | 1945-05-11 | 1947-01-07 | Leo Caspar Steinle | Improvements in or relating to work rests for thread generating machines |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
| CN205414619U (en) * | 2016-03-16 | 2016-08-03 | 浙江加耐特阀杆有限公司 | Valve rod screw thread thread rolling machine |
| CN106181276A (en) * | 2016-08-24 | 2016-12-07 | 青阳县恒远机械制造有限责任公司 | A kind of screw rod processing technique |
| CN106583610A (en) * | 2016-11-08 | 2017-04-26 | 新昌县儒岙镇衡翔机械厂 | Multifunctional thread roller |
| CN107299202A (en) * | 2017-05-16 | 2017-10-27 | 沈阳透平机械股份有限公司 | The conditioning treatment process choice method of carburizing and quenching gear anti-distortion |
-
2018
- 2018-11-23 CN CN201811403946.7A patent/CN109604943A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB584111A (en) * | 1945-05-11 | 1947-01-07 | Leo Caspar Steinle | Improvements in or relating to work rests for thread generating machines |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
| CN205414619U (en) * | 2016-03-16 | 2016-08-03 | 浙江加耐特阀杆有限公司 | Valve rod screw thread thread rolling machine |
| CN106181276A (en) * | 2016-08-24 | 2016-12-07 | 青阳县恒远机械制造有限责任公司 | A kind of screw rod processing technique |
| CN106583610A (en) * | 2016-11-08 | 2017-04-26 | 新昌县儒岙镇衡翔机械厂 | Multifunctional thread roller |
| CN107299202A (en) * | 2017-05-16 | 2017-10-27 | 沈阳透平机械股份有限公司 | The conditioning treatment process choice method of carburizing and quenching gear anti-distortion |
Non-Patent Citations (1)
| Title |
|---|
| 胡保全: "《金属热处理原理与工艺》", 中国铁道出版社, pages: 1359 - 188 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648275A (en) * | 2020-12-16 | 2021-04-13 | 湖北友谦汽车零部件有限公司 | Fastening bolt for automobile and preparation method thereof |
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