CN107350734A - A kind of manufacturing process of high intensity hex nut for plunger pump - Google Patents
A kind of manufacturing process of high intensity hex nut for plunger pump Download PDFInfo
- Publication number
- CN107350734A CN107350734A CN201610305228.0A CN201610305228A CN107350734A CN 107350734 A CN107350734 A CN 107350734A CN 201610305228 A CN201610305228 A CN 201610305228A CN 107350734 A CN107350734 A CN 107350734A
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- China
- Prior art keywords
- normalizing
- nut
- smart car
- technique
- plunger pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C21D1/18—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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
Abstract
The present invention discloses a kind of manufacturing process of the high intensity hex nut for plunger pump, comprises the following steps：Normalizing, rough turn, drilling, quenched, shot-peening, smart car, milling outer-hexagonal, smart car screw thread and post processing.The present invention is 0.65wt%~0.85wt% from manganese content, S content≤0.025%, the 42CrMo round steel of P content≤0.025% carries out the technique such as normalizing, shot-peening, quenched for its characteristic as embryo material successively, effectively realizes being uniformly distributed for crystal grain and carbide in material；Oil cooling hardening and tempering process and water cooling hardening and tempering process successively are carried out to material, and accurately holds interval time between the two and enters the product temperature parameter of next workshop section, material internal defect is further removed, improves material property；Deviation ratio≤0.01% of this processing scheme；Material elongation percentage improves to the 15%, contraction percentage of area and is reduced to 40%, bonnet tensile strength >=800MPa, yield strength >=750MPa made from this processing technology.
Description
Technical field
The invention belongs to machining technology field, and in particular to a kind of manufacture of high intensity hex nut for plunger pump
Technique.
Background technology
Plunger pump is an important device of hydraulic system, and it is moved back and forth by plunger in cylinder body, holds seal operation
The volume of chamber changes to realize oil suction, force feed, and plunger will move back and forth in cylinder body, and its amount of exercise is very big, because
This, plunger pump is particularly the plunger pump for being used for shale gas exploitation, and larger pressure difference is had because working strength is higher, inside and outside pump,
To prevent the liquid leakage in the pump housing, it is desirable to which the intensity of each parts on the pump housing is high, the fitness with pump body
It is better, in plunger pump body assembling process, commonly uses hex nut, because the working strength of plunger pump is higher, therefore will
The performances such as intensity, the abrasion resistance of hex nut are asked to get well；At present, the existing hex nut of in the market uses common steel,
Common preparation technology, resulting nut strength is only capable of reaching 100MPa or so, and the contraction percentage of area is higher, holds
It is easily caused that to process member inconsistent with pre-set dimension, can not well coordinates with the pump housing in assembling process, reduce and coordinate
Degree, the problem of poor connectivity and sealing difference with plunger pump body in the course of the work be present, influence plunger pump
Operating efficiency.
The content of the invention
Goal of the invention：Present invention aims in view of the shortcomings of the prior art, there is provided a kind of machining accuracy it is high be used for post
The manufacturing process of the high intensity hex nut of pump is filled in, it is high that what this technique was completed processes member good combination property, switching performance.
Technical scheme：A kind of manufacturing process of high intensity hex nut for plunger pump of the present invention, including such as
Lower step：
(1) normalizing：According to embryo material under the size of default hex nut, normalized treatment, the normalized treatment are then carried out
Technique includes high temperature normalizing technique and cryogenic normalizing technique；First embryo material is heated in the high temperature normalizing technique
850~950 DEG C of 2~5h of insulation, are then cooled to 600~700 DEG C soon；Embryo material is existed in the cryogenic normalizing technique
Carry out being air-cooled to room temperature after being incubated 2~5h at 600~700 DEG C；
(2) it is rough turn：It is cold to embryo material after normalizing set to 0 .5~2h after, according to pre-set dimension rough turn nut external diameter, end face and thickness
Degree, obtains the overall profile of nut；
(3) drill：Using the thick auger shell mother mating holes of drill bit, and it is processed further with hole boring cutter, the auger axis turn
Speed is 120~200r/min；Hole boring cutter rotating speed is 300~500r/min, and bite is 0.5~3mm；After drilling,
Remove the burr at center port both ends, and chamfering；
(4) it is quenched：The modifier treatment technique includes oil cooling hardening and tempering process and water cooling hardening and tempering process；The oil cooling is quenched
Nut is first heated up to 800~900 DEG C in technique, oil-quenching tank is transferred to after warm 2.5~5h and carries out oil quenchinng, it is cold
But tempering is heated up to 550~650 DEG C after standing 0.5~2h to 180~220 DEG C, is transferred to after warm 2.5~5h in tank
Water cooling is carried out, tank is hung out after being cooled to 180~220 DEG C；
(5) shot-peening：Shot Blasting is carried out to nut, single-nozzle ball blast amount is 45~50Kg/min, and velocity of shot is
70~80m/s；
(6) smart car：It is cold after modifier treatment to put 1~3h, using smart car to the external diameter of nut, end face and thickness smart car
Processing, the speed of mainshaft of the smart car lathe tool is 300~500r/min；Smart car removes corner burr and chamfering after terminating；
(7) milling outer-hexagonal：Using milling cutter finish-milling nut outer-hexagonal, the speed of mainshaft of the milling cutter is 500~600r/min,
Bite is 0.2~0.5mm；
(8) smart car screw thread：The lathe tool speed of mainshaft is 200~400r/min, and it is 0.1~0.5mm/s to enter part speed；
(9) post-process：Part No. is carved on bonnet end face, and clears up packaging.
Preferably, the embryo material is 42CrMo round steel, and wherein Mn contents are 0.65wt%~0.85wt%, S contents≤
0.025wt%, P content≤0.025wt%.
Preferably, in step (1), coolant temperature remains -10~10 DEG C during rapid cooling in the normalizing process.
Preferably, in step (1), keep indoor temperature stable in embryo material process air cooler in the normalizing process, and protect
Hold as 15~25 DEG C.
Preferably, in modifier treatment technical process, the oil-quenching tank temperature remains 40~80 DEG C.
Beneficial effect：(1) present invention is 0.65wt%~0.85wt% from manganese content, and S contents≤0.025%, P contain
The 42CrMo round steel of amount≤0.025% carries out the technique such as normalizing, shot-peening, quenched successively as embryo material, and for its characteristic,
Normalizing procedure is divided into high temperature normalizing technique and cryogenic normalizing technique, and high temperature rapid cooling technique combination low temperature air cooling technique is effectively real
Crystal grain and carbide is uniformly distributed in existing material；And strictly control the temperature of cooling medium in cooling procedure, maximum journey
Degree reduces the influence to part hardness；(2) modifier treatment condition is very big to the performance impact of material, and the present invention is successively right
Material carries out oil cooling hardening and tempering process and water cooling hardening and tempering process, and accurately holds interval time between the two and enter next work
The product temperature parameter of section, arrange in pairs or groups appropriate programming rate, refining temperature, soaking time and hardening heat, further goes
Except material internal defect, material property is improved, material elongation percentage is improved, reduces the contraction percentage of area；(3) root in the present invention
According to the property settings normalizing of finish-forging material, shot-peening and the technological parameter such as quenched, can effectively assist to improve material elongation percentage extremely
15%th, the contraction percentage of area is reduced to 40%, effectively prevents material from occurring completion part in process and being differed with pre-set dimension
The problem of increasing；(4) it is of the invention according to material property, the parameter of rough turn, thin Vehicle Processing technique is set, effectively reduces and adds
The mismachining tolerance of work process kind, improve processing precision, deviation ratio≤0.01% of the processing of this programme；(4) this adds
Tensile strength >=800MPa of hex nut made from work technique, yield strength >=750MPa.
Embodiment
Technical solution of the present invention is described in detail below by embodiment, but protection scope of the present invention is not limited to
The embodiment.
Embodiment 1：A kind of manufacturing process of high intensity hex nut for plunger pump, comprises the following steps：
(1) normalizing：According to embryo material under the size of default hex nut, the embryo material is 42CrMo round steel, wherein Mn
Content is 85wt%, and S contents are 0.018wt%, P content 0.018wt%；Then carry out normalized treatment, it is described just
Fiery handling process includes high temperature normalizing technique and cryogenic normalizing technique；First embryo material is heated in the high temperature normalizing technique
900~910 DEG C of insulation 3h, are then cooled to 650~660 DEG C, coolant temperature remains -5~5 DEG C during this soon；
Embryo material is incubated after 3h at 650~660 DEG C in the cryogenic normalizing technique and carries out being air-cooled to room temperature, is kept during this
Indoor temperature is stable, and remains 15~20 DEG C；
(2) it is rough turn：It is cold to embryo material after normalizing put 1.2h after, according to pre-set dimension rough turn nut external diameter, end face and thickness,
Obtain the overall profile of nut；
(3) drill：Using the thick auger shell mother mating holes of drill bit, and it is processed further with hole boring cutter, the auger axis turn
Speed is 180r/min；Hole boring cutter rotating speed is 400r/min, bite 1.5mm；After drilling, centre bore is removed
The burr at mouth both ends, and chamfering；
(4) it is quenched：The modifier treatment technique includes oil cooling hardening and tempering process and water cooling hardening and tempering process；The oil cooling is quenched
Nut is first heated up to 850~860 DEG C in technique, oil-quenching tank is transferred to after warm 3h and carries out oil quenchinng, it is described to quench
Fiery oil sump temperature remains 50~60 DEG C, be cooled to 190~200 DEG C stand 1h after tempering be heated up to 600~610 DEG C, warp
It is transferred in tank after insulation 3h and carries out water cooling, tank is hung out after being cooled to 190~200 DEG C, being put into generation turns region；
(5) shot-peening：Shot Blasting is carried out to nut, single-nozzle ball blast amount is 48Kg/min, velocity of shot 75m/s；
(6) smart car：It is cold after modifier treatment to put 1.5h, using smart car to the external diameter of nut, end face and thickness smart car
Processing, the speed of mainshaft of the smart car lathe tool is 400r/min；Smart car removes corner burr and chamfering after terminating；
(7) milling outer-hexagonal：Using milling cutter finish-milling nut outer-hexagonal, the speed of mainshaft of the milling cutter is 550r/min, is eaten
Knife amount is 0.35mm；
(8) smart car screw thread：The lathe tool speed of mainshaft is 300r/min, and it is 0.25mm/s to enter part speed；
(9) post-process：Part No. is carved on bonnet end face, and clears up packaging.
Embodiment 2：A kind of manufacturing process of high intensity hex nut for plunger pump, comprises the following steps：
(1) normalizing：According to embryo material under the size of default hex nut, the embryo material is 42CrMo round steel, wherein Mn
Content is 0.80wt%, and S contents are 0.022wt%, P content 0.022wt%；Then normalized treatment is carried out, it is described
Normalized treatment technique includes high temperature normalizing technique and cryogenic normalizing technique；First embryo material is heated in the high temperature normalizing technique
850~860 DEG C of insulation 2h, are then cooled to 600~610 DEG C, coolant temperature remains -10~0 DEG C during this soon；
Embryo material is incubated after 3h at 650~660 DEG C in the cryogenic normalizing technique and carries out being air-cooled to room temperature, is kept during this
Indoor temperature is stable, and remains 20~25 DEG C；
(2) it is rough turn：It is cold to embryo material after normalizing set to 0 .5h after, according to pre-set dimension rough turn nut external diameter, end face and thickness,
Obtain the overall profile of nut；
(3) drill：Using the thick auger shell mother mating holes of drill bit, and it is processed further with hole boring cutter, the auger axis turn
Speed is 120r/min；Hole boring cutter rotating speed is 300r/min, bite 0.5mm；After drilling, centre bore is removed
The burr at mouth both ends, and chamfering；
(4) it is quenched：The modifier treatment technique includes oil cooling hardening and tempering process and water cooling hardening and tempering process；The oil cooling is quenched
Nut is first heated up to 800~810 DEG C in technique, oil-quenching tank is transferred to after warm 2.5h and carries out oil quenchinng, it is described
Oil-quenching tank temperature remains 40~50 DEG C, be cooled to 180~190 DEG C stand 0.5h after tempering be heated up to 550~560 DEG C,
Be transferred to after warm 2.5h in tank and carry out water cooling, tank is hung out after being cooled to 180~190 DEG C, be put into generation turn region；
(5) shot-peening：Shot Blasting is carried out to nut, single-nozzle ball blast amount is 45Kg/min, velocity of shot 70m/s；
(6) smart car：It is cold after modifier treatment to put 1h, added using smart car to the external diameter of nut, end face and thickness smart car
Work, the speed of mainshaft of the smart car lathe tool is 300r/min；Smart car removes corner burr and chamfering after terminating；
(7) milling outer-hexagonal：Using milling cutter finish-milling nut outer-hexagonal, the speed of mainshaft of the milling cutter is 500r/min, is eaten
Knife amount is 0.2mm；
(8) smart car screw thread：The lathe tool speed of mainshaft is 200r/min, and it is 0.1mm/s to enter part speed；
(9) post-process：Part No. is carved on bonnet end face, and clears up packaging.
Embodiment 3：A kind of manufacturing process of high intensity hex nut for plunger pump, comprises the following steps：
(1) normalizing：According to embryo material under the size of default hex nut, the embryo material is 42CrMo round steel, wherein Mn
Content is 0.65wt%, and S contents are 0.025wt%, P content 0.025wt%；Then normalized treatment is carried out, it is described
Normalized treatment technique includes high temperature normalizing technique and cryogenic normalizing technique；First embryo material is heated in the high temperature normalizing technique
940~950 DEG C of insulation 5h, are then cooled to 690~700 DEG C, coolant temperature remains 5~10 DEG C during this soon；
Embryo material is incubated after 5h at 690~700 DEG C in the cryogenic normalizing technique and carries out being air-cooled to room temperature, is kept during this
Indoor temperature is stable, and remains 20~25 DEG C；
(2) it is rough turn：It is cold to embryo material after normalizing put 2h after, according to pre-set dimension rough turn nut external diameter, end face and thickness,
Obtain the overall profile of nut；
(3) drill：Using the thick auger shell mother mating holes of drill bit, and it is processed further with hole boring cutter, the auger axis turn
Speed is 200r/min；Hole boring cutter rotating speed is 500r/min, bite 3mm；After drilling, center port is removed
The burr at both ends, and chamfering；
(4) it is quenched：The modifier treatment technique includes oil cooling hardening and tempering process and water cooling hardening and tempering process；The oil cooling is quenched
Nut is first heated up to 890~900 DEG C in technique, oil-quenching tank is transferred to after warm 5h and carries out oil quenchinng, it is described to quench
Fiery oil sump temperature remains 70~80 DEG C, be cooled to 210~220 DEG C stand 2h after tempering be heated up to 550~560 DEG C, warp
It is transferred in tank after insulation 5h and carries out water cooling, tank is hung out after being cooled to 200~210 DEG C, being put into generation turns region；
(5) shot-peening：Shot Blasting is carried out to nut, single-nozzle ball blast amount is 50Kg/min, velocity of shot 80m/s；
(6) smart car：It is cold after modifier treatment to put 3h, added using smart car to the external diameter of nut, end face and thickness smart car
Work, the speed of mainshaft of the smart car lathe tool is 500r/min；Smart car removes corner burr and chamfering after terminating；
(7) milling outer-hexagonal：Using milling cutter finish-milling nut outer-hexagonal, the speed of mainshaft of the milling cutter is 600r/min, is eaten
Knife amount is 0.5mm；
(8) smart car screw thread：The lathe tool speed of mainshaft is 400r/min, and it is 0.5mm/s to enter part speed；
(9) post-process：Part No. is carved on bonnet end face, and clears up packaging.
The correction data of the properties of product of the embodiment of the present invention 1~3 and existing product performance is as shown in table 1；
The properties of product of the embodiment 1~3 of table 1 and the correction data of existing product performance
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, but it shall not be construed as
To the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims define are not departed from
Various changes can be made in the form and details for it.
Claims (5)
1. the manufacturing process of a kind of high intensity hex nut for plunger pump, it is characterised in that comprise the following steps：
(1) normalizing：According to embryo material under the size of default hex nut, normalized treatment, the normalized treatment are then carried out
Technique includes high temperature normalizing technique and cryogenic normalizing technique；First embryo material is heated in the high temperature normalizing technique
850~950 DEG C of 2~5h of insulation, are then cooled to 600~700 DEG C soon；Embryo material is existed in the cryogenic normalizing technique
Carry out being air-cooled to room temperature after being incubated 2~5h at 600~700 DEG C；
(2) it is rough turn：It is cold to embryo material after normalizing set to 0 .5~2h after, according to pre-set dimension rough turn nut external diameter, end face and thickness
Degree, obtains the overall profile of nut；
(3) drill：Using the thick auger shell mother mating holes of drill bit, and it is processed further with hole boring cutter, the auger axis turn
Speed is 120~200r/min；Hole boring cutter rotating speed is 300~500r/min, and bite is 0.5~3mm；After drilling,
Remove the burr at center port both ends, and chamfering；
(4) it is quenched：The modifier treatment technique includes oil cooling hardening and tempering process and water cooling hardening and tempering process；The oil cooling is quenched
Nut is first heated up to 800~900 DEG C in technique, oil-quenching tank is transferred to after warm 2.5~5h and carries out oil quenchinng, it is cold
But tempering is heated up to 550~650 DEG C after standing 0.5~2h to 180~220 DEG C, is transferred to after warm 2.5~5h in tank
Water cooling is carried out, tank is hung out after being cooled to 180~220 DEG C；
(5) shot-peening：Shot Blasting is carried out to nut, single-nozzle ball blast amount is 45~50Kg/min, and velocity of shot is
70~80m/s；
(6) smart car：It is cold after modifier treatment to put 1~3h, using smart car to the external diameter of nut, end face and thickness smart car
Processing, the speed of mainshaft of the smart car lathe tool is 300~500r/min；Smart car removes corner burr and chamfering after terminating；
(7) milling outer-hexagonal：Using milling cutter finish-milling nut outer-hexagonal, the speed of mainshaft of the milling cutter is 500~600r/min,
Bite is 0.2~0.5mm；
(8) smart car screw thread：The lathe tool speed of mainshaft is 200~400r/min, and it is 0.1~0.5mm/s to enter part speed；
(9) post-process：Part No. is carved on bonnet end face, and clears up packaging.
2. the manufacturing process of the high intensity hex nut according to claim 1 for plunger pump, it is characterised in that：
The embryo material is 42CrMo round steel, and wherein Mn contents are 0.65wt%~0.85wt%, S contents≤0.025wt%, P
Content≤0.025wt%.
3. the manufacturing process of the high intensity hex nut according to claim 1 for plunger pump, it is characterised in that：
In step (1), coolant temperature remains -10~10 DEG C during rapid cooling in the normalizing process.
4. the manufacturing process of the high intensity hex nut according to claim 1 for plunger pump, it is characterised in that：
In step (1), keep indoor temperature stable in embryo material process air cooler in the normalizing process, and remain 15~25 DEG C.
5. the manufacturing process of the high intensity hex nut according to claim 1 for plunger pump, it is characterised in that：
In modifier treatment technical process, the oil-quenching tank temperature remains 40~80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305228.0A CN107350734A (en) | 2016-05-09 | 2016-05-09 | A kind of manufacturing process of high intensity hex nut for plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305228.0A CN107350734A (en) | 2016-05-09 | 2016-05-09 | A kind of manufacturing process of high intensity hex nut for plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107350734A true CN107350734A (en) | 2017-11-17 |
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ID=60270606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610305228.0A Pending CN107350734A (en) | 2016-05-09 | 2016-05-09 | A kind of manufacturing process of high intensity hex nut for plunger pump |
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| CN (1) | CN107350734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112269A (en) * | 2018-10-25 | 2019-01-01 | 瑞安市宇轩汽车零部件有限公司 | The processing method of automobile nut |
-
2016
- 2016-05-09 CN CN201610305228.0A patent/CN107350734A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112269A (en) * | 2018-10-25 | 2019-01-01 | 瑞安市宇轩汽车零部件有限公司 | The processing method of automobile nut |
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Application publication date: 20171117 |