CN106378594A - Preparing method for automobile chain wheel - Google Patents
Preparing method for automobile chain wheel Download PDFInfo
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- CN106378594A CN106378594A CN201611013620.4A CN201611013620A CN106378594A CN 106378594 A CN106378594 A CN 106378594A CN 201611013620 A CN201611013620 A CN 201611013620A CN 106378594 A CN106378594 A CN 106378594A
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- blank
- sprocket wheel
- teeth portion
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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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
Abstract
The invention relates to a preparing method for an automobile chain wheel. According to the method, round steel or a hollow pipe material is subjected to a series of treatment such as annealing, shot blasting and saponification of phosphorus, the performance of a blank can be primarily improved through annealing and shot blasting, after an inner layer protection film and an outer layer lubricating film are formed on the surface of the blank through saponification of phosphorus, cold extrusion is conducted, and the problems of blank surface cracking and the like in the cold extrusion process can be solved. After the component appearance meeting the requirement is obtained through the procedures of extrusion, inner hole turning, groove cutting, positioning structure machining and the like, a component is subjected to carburizing and quenching and tempering treatment, the hardness of a workpiece is further improved, and the metallographic structure of the workpiece can meet the QC/T262-1999 requirement. A gear part structure is directly machined in the cold extrusion process. Compared with the prior art, adopted equipment is relatively simple, and the production efficiency is effectively improved. Due to the fact that the hardness of the workpiece is improved step by step in the whole component preparing process, the abrasion of a tool is effectively avoided, and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of preparation method of automobile sprocket wheel.
Background technology
Fig. 1,2,8 show a kind of automobile sprocket wheel structure, in prior art, when producing to such automobile sprocket wheel,
It is usually that machining is carried out to the round steel after cure process, the positions such as the gear of needs are cut on round steel.And adopt this
The mode of production of sample, needs more huge, the complicated equipment of configuration, and the abrasion to cutter is also larger, leads to the cost producing relatively
High；And the mode production efficiency of cutting is extremely inefficient, a general machine can be only done 50 about finished products for one day.
Application publication number is the Chinese invention patent application of CN103659166A《A kind of blind tooth precise cold of little shape is squeezed into
Type processing method》(application number：CN201210329047.3) disclose a kind of preparation technology of tooth like members, its step is as follows：
(1) blanking：Use forcing press blanking, coiled strip steel wire is cut into material-saving on forcing press, the two-sided made allowance of material-saving
0.3mm～0.5mm；
(2) shaping：Material-saving is placed in the shaping mould with cutting edge, upsetting squeeze, excess waste are carried out on forcing press
It is extruded outside mould；
(3) deburring：Blank after shaping is put into unhairing machine and carries out deburring and cleaning；
(4) squeeze shape：Micro- for the blank of deburring painting is put in crowded shape mould after extruding oil, closing is carried out on forcing press and squeezes
Shape, squeezes out the size of the shape of product in addition to profile of tooth；
(5) crowded teeth：To put in crowded teeth mould after micro- for the blank after crowded shape applying extruding oil, use be carried out on forcing press just crowded
Pressure mode carries out crowded teeth；
(6) clean：With gasoline, product is carried out；
(7) check：Carry out size and appearance test by product figure.
Above-mentioned tooth like members priority employs shape of product in addition to profile of tooth for the fashion of extrusion shaping and teeth portion shape, very big
Production efficiency is improve in degree, but, above-mentioned tooth like members structure is excessively simple, with the automobile sprocket wheel structure shown in Fig. 1,2
Belong to different applications, structural difference larger it is impossible to prepare Fig. 1, the automobile sprocket wheel structure shown in 2.
Content of the invention
The technical problem to be solved is the present situation for prior art, provides a kind of production efficiency height, produces
The preparation method of the automobile sprocket wheel of low cost.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：A kind of preparation method of automobile sprocket wheel, it is special
Levy and be to comprise the following steps：
(1) blanking：Round steel or hollow materials in the tube are cut into needs the blank of length, the two-sided made allowance of blank；Above-mentioned round steel
Refer to solid cylindrical steel, hollow materials in the tube refer to the cylindrical steel of inner hollow, but need to ensure the internal diameter of hollow materials in the tube less than with
The aperture of turning gained endoporus in lower step (6), is for saving steel from hollow materials in the tube, reduces production cost；
(2) annealing and ball blast：First blank is carried out making annealing treatment and again Shot Blasting is carried out to it so as to outward appearance non-oxidation
Skin, hardness is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn into the cylindrical-shaped structure of standard；
(4) phospholeum：First phosphorating treatment is carried out to blank, form layer protecting film in blank surface；Phosphorating treatment is laggard
Row saponification process, forms one layer of lubricating film outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, squeezes out teeth portion in blank periphery, and in base
Material top reserves one section of no teeth portion, the blank surface mating shapes that the inner surface configuration of above-mentioned die is completed with extruding；
(6) in-car hole：In the middle part of blank, turning vertically goes out endoporus, and the periphery turning in blank no teeth portion goes out between outer land
Rank, go out interior step in the inner circumferential turning of blank no teeth portion；
(7) cut groove：Cut groove in the turning of blank periphery, make blank periphery maintain a row or multi-row teeth portion；
(8) locating and machining structure：
Milling boss：The top end face of blank no teeth portion processes boss, and this convex edge of table is carried out at chamfering
Reason；Or
Draw inside groove：Keyway is processed on the inner hole wall of blank；
(9) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as timing marks；
(10) it is heat-treated：Carburizing and quenching and temper are carried out to step (9) gained blank, so that blank surface is hardened, that is,
Obtain described automobile sprocket wheel.
The workpiece higher in order to obtain precision, carries out to gained automobile sprocket wheel refining at endoporus and cleaning after step (10)
Reason, makes surface no dirt.
As improvement, the integrated disposal processing that described annealing process heats up for staged and lowers the temperature, annealing temperature
Degree 200 DEG C and more than.Using such processing procedure, hardness and the Oxygen potential of blank can be effectively improved.
Specifically, described annealing process detailed process is
First it is warming up to 200～210 DEG C with stove, be incubated 1.8～2.2 hours；
It is warming up to 600～610 DEG C with stove again, be incubated 0.8～1.2 hour；
It is warming up to 780～790 DEG C with stove again, be incubated 7.8～8.2 hours；
It is cooled to 680～690 DEG C with stove, be incubated 7.8～8.2 hours；
It is cooled to 450 DEG C and less again, come out of the stove.
In order to accelerate speed of coming out of the stove, be cooled to 450 DEG C and following during, first with stove cooling, when temperature is down to 550
DEG C when, open air blast and lowered the temperature.
In above-mentioned each scheme, after described annealing process completes and workpiece is cooled to normal temperature, using Shot Blasting.
Improve further, described phosphorus saponification process includes oil removing, washing for the first time, rust cleaning, second washing, surface successively
Regulation, phosphatization, third time washing and saponification.Using such process, so that blank surface is fully cleaned and smooth, then utilize
Parkerizing process forms layer protecting film in blank surface, carries out saponification again after abundant washing, one layer of profit of attachment outside diaphragm
Synovial membrane, can prevent blank surface from producing the defects such as cracking in subsequent extrusion and processing procedure.
Specifically, described oil removal process be containing percentage by weight being in 6% degreasing agent, temperature be 80～95 DEG C,
PH be 10～12 environment in carry out, process time be 5～10 minutes；The hydrochloric acid that described descaling process is 20% in volume content
Carry out in solution, process time is 5～10 minutes；Described surface modulation process is in the surface modulation being 2 ‰ containing volume content
In agent solution, pH be 8～9 environment in carry out, process time be 0.5～1 minute；Described Phosphating Treatment Process is containing volume
Content be 6% supply agent solution in, temperature be to carry out in 75～85 DEG C of environment, process time is 15～25 minutes, and should
In supply agent solution, total acid content is 45～55%, and free acid content is 5～7%；Described saponification process is containing volume content
In solution for 5～6% lubricants, temperature be 70～80 DEG C, pH be 8～9 environment in carry out, process time be 3～5 points
Clock.
Improve again, described heat treatment process includes pretreatment, carburizing and quenching, cleaning and tempering successively, and wherein, carburizing is quenched
Hardness >=the 90HR15N, the hardness >=89HR15N of described blank teeth portion after tempering of described blank teeth portion after fire；In metallography microscope
When instrument amplifies 100 times, described blank is less than along the ferrite in teeth portion face and bainite content in 0.3mm depth bounds
10%.
Specifically, above-mentioned preprocessing process is：First spray 3min, then spray 4min, soak 2min, shake 1min, soak
Standby 3min, sprays 3min, draining 2min, 20min is dried.
Described carburizing and quenching and drawing process are：
It is warming up to 920～930 DEG C, be incubated 150～160min；
It is cooled to 850～860 DEG C with stove, be incubated 30～40min；
Workpiece is moved to cooling in 60～80 DEG C of oil groove；
After being down to room temperature, workpiece is warming up to 180～190 DEG C, is incubated 150～160min；
Come out of the stove air cooling.
Compared with prior art, it is an advantage of the current invention that：The present invention has first carried out annealing, has thrown to round steel or hollow materials in the tube
A series of process such as ball and phospholeum, can make the performance of blank tentatively be improved by annealing and ball blast, hardness reaches HRB80
Hereinafter, then by phospholeum carry out cold extrusion after blank surface forms internal layer diaphragm and outer layer lubricating film, cold-extruded can be avoided
The appearance of the problems such as cause blank surface cracking during pressure；The present invention is passing through extruding, in-car hole, is cutting the works such as groove, milling boss
Blank is processed as after satisfactory External Shape sequence, and it has been carried out with the place at least including carburizing and quenching and drawing process
Reason, thus further increasing the hardness of workpiece, and makes the metallographic structure of workpiece meet the requirement of QC/T262-1999, quick
To qualified automobile sprocket wheel workpiece；The present invention directly processes teeth portion structure by Cold Extrusion Process, cuts with of the prior art
The process of cutting is compared, and the equipment being used is relatively simple, effectively increases production efficiency, can produce automobile sprocket wheel three or four thousand within one day
Individual, and because whole part preparation process is in the hardness improving workpiece step by step, effectively prevent the abrasion to cutter, reduce
Production cost.
Brief description
Fig. 1 is a kind of structural representation of automobile sprocket wheel in background of invention；
Fig. 2 is the structural representation of another angle of Fig. 1；
Fig. 3 is the blank structure schematic diagram after step (5) gained extruding in the embodiment of the present invention 1～4；
Fig. 4 is the blank structure schematic diagram behind step (6) gained in-car hole in the embodiment of the present invention 1～4；
Fig. 5 be the embodiment of the present invention 1～4 in step (7) gained cut groove after blank structure schematic diagram；
Fig. 6 is the blank structure schematic diagram after step (8) gained milling boss in the embodiment of the present invention 1～3；
Fig. 7 is the blank structure schematic diagram that in the embodiment of the present invention 1～4, step (10) gained processes after timing marks；
Fig. 8 is another kind of structural representation of automobile sprocket wheel in background of invention；
Fig. 9 be the embodiment of the present invention 4 in step (8) gained draw keyway after blank structure schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment 1：
In the present embodiment, the preparation method of automobile sprocket wheel comprises the following steps：
(1) blanking：The 20CrMo round steel saw bed of φ 45 is cut into needs the blank of length, and blank is two-sided
Made allowance；
(2) annealing and ball blast：First blank is carried out with staged annealing, annealing process detailed process is
First it is warming up to 200 DEG C with stove, be incubated 2.2 hours；
It is warming up to 600 DEG C with stove again, be incubated 1.2 hours；
It is warming up to 780 DEG C with stove again, be incubated 8.2 hours；
It is cooled to 680 DEG C with stove, be incubated 8.2 hours；
It is cooled to 450 DEG C and less again, come out of the stove；In this temperature-fall period, first with stove cooling, when temperature is down to 550 DEG C,
Open air blast to be lowered the temperature；
After annealing process completes and workpiece is cooled to normal temperature, using sand drum-type Shot Blasting；
Through above-mentioned processing procedure, the outward appearance non-scale of blank, hardness is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn on centerless grinder the cylindrical-shaped structure of standard；
(4) phospholeum：This process includes procedure below successively
Oil removing, containing percentage by weight being in 6% degreasing agent, temperature be 80 DEG C, pH be 10～12 environment in enter
OK, process time is 5 minutes；
Wash for the first time, the clear water using overflow is carried out to blank at normal temperatures, scavenging period is 1min；
Rust cleaning, normal temperature, volume content be 20% hydrochloric acid solution in carry out, process time is 5 minutes；
Second washes, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 1min, clean to
Blank surface pH value is 6～8；
Surface modulation, containing volume content being in 2 ‰ surface modulation agent solution, pH be 8～9 environment in carry out,
Process time is 0.5 minute；
Phosphatization, containing volume content being in the solution of 6% supply agent LT-620, temperature be to carry out in 75 DEG C of environment,
Process time is that in 15 minutes, and this supply agent LT-620 solution, total acid content is 45～55%, and free acid content is 5～7%；
Third time is washed, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 1min；
Saponification, containing volume content being in the solution of 5% lubricant, temperature be 70 DEG C, pH be 8～9 environment in enter
OK, process time is 3 minutes；
By above-mentioned processing procedure, first pass through chemical action and form layer protecting film in blank surface, then made by physics
One layer of lubricating film is adhered to outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, under extruding force, squeezes out in blank periphery
Teeth portion 1, and reserve one section of no teeth portion 2 at blank top, as shown in Figure 3；
(6) in-car hole：In the middle part of blank, turning vertically goes out endoporus 3, and the periphery turning in blank no teeth portion goes out between outer land
Rank 4, go out interior step 5 in the inner circumferential turning of blank no teeth portion, as shown in Figure 4；
(7) cut groove：The turning of blank periphery go out spaced apart cut groove 6, and each edge cutting groove is carried out at chamfering
Reason, as shown in Figure 5；
(8) milling boss：The top end face of blank no teeth portion processes boss 7, and this convex edge of table is fallen
Angle is processed, as shown in Figure 6；
(9) deburring and surface polishing：With High speed sculpture machine, deburring process is carried out to blank, then use AFM machine to base
Material carries out surface polishing；
(10) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as timing marks
8, as shown in Figure 7；
(11) it is heat-treated：Heat treatment process includes pretreatment, carburizing and quenching, cleaning and tempering successively, wherein, pretreated
Cheng Wei
First spray 3min, then spray 4min, soak 2min, shake 1min, soak standby 3min, spray 3min, draining
2min, is dried 20min；
Carburizing and quenching process is
It is warming up to 920 DEG C, be incubated 160min；
It is cooled to 850 DEG C with stove, be incubated 30min；
Workpiece is moved to cooling in 60 DEG C of oil groove；
Cleaning process is
After being cooled to room temperature, cleaning removes the carbon black greasy dirt of blank surface；
Drawing process is
Workpiece is warming up to 180 DEG C, is incubated 160min；
Come out of the stove air cooling；
Hardness >=the 90HR15N of blank teeth portion after above-mentioned carburizing and quenching, the hardness >=89HR15N of blank teeth portion after tempering；
The effective case depth of blank surface is 0.40～0.80mm, and when metallography microscope instrument amplifies 100 times, blank is along teeth portion face
Ferrite and bainite in 0.3mm depth bounds content be less than 10%；
(12) fine grinding endoporus and cleaning：Step (11) gained workpiece is carried out refine endoporus process using internal grinder；With
The dirt on hanging type cleaning machine cleaning workpiece surface, that is, obtain target product automobile sprocket wheel.
Embodiment 2：
In the present embodiment, the preparation method of automobile sprocket wheel comprises the following steps：
(1) blanking：The 20CrMo round steel saw bed of φ 46 is cut into needs the blank of length, and blank is two-sided
Made allowance；
(2) annealing and ball blast：First blank is carried out with staged annealing, annealing process detailed process is
First it is warming up to 210 DEG C with stove, be incubated 1.8 hours；
It is warming up to 610 DEG C with stove again, be incubated 0.8 hour；
It is warming up to 790 DEG C with stove again, be incubated 7.8 hours；
It is cooled to 690 DEG C with stove, be incubated 7.8 hours；
It is cooled to 450 DEG C and less again, come out of the stove；In this temperature-fall period, first with stove cooling, when temperature is down to 550 DEG C,
Open air blast to be lowered the temperature；
After annealing process completes and workpiece is cooled to normal temperature, using Shot Blasting；
Through above-mentioned processing procedure,
The outward appearance non-scale of blank, hardness is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn on centerless grinder the cylindrical-shaped structure of standard；
(4) phospholeum：This process includes procedure below successively
Oil removing, containing percentage by weight being in 6% degreasing agent, temperature be 95 DEG C, pH be 10～12 environment in enter
OK, process time is 10 minutes；
Wash for the first time, the clear water using overflow is carried out to blank at normal temperatures, scavenging period is 2min；
Rust cleaning, normal temperature, volume content be 20% hydrochloric acid solution in carry out, process time is 10 minutes；
Second washes, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 2min, clean to
Blank surface pH value is 6～8；
Surface modulation, containing volume content being in 2 ‰ surface modulation agent solution, pH be 8～9 environment in carry out,
Process time is 1 minute；
Phosphatization, containing volume content being in the solution of 6% supply agent LT-620, temperature be to carry out in 85 DEG C of environment,
Process time is that in 25 minutes, and this supply agent LT-620 solution, total acid content is 45～55%, and free acid content is 5～7%；
Third time is washed, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 2min；
Saponification, containing volume content being in the solution of 6% lubricant, temperature be 80 DEG C, pH be 8～9 environment in enter
OK, process time is 5 minutes；
By above-mentioned processing procedure, first pass through chemical action and form layer protecting film in blank surface, then made by physics
One layer of lubricating film is adhered to outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, under extruding force, squeezes out in blank periphery
Teeth portion, and reserve one section of no teeth portion at blank top, as shown in Figure 3；
(6) in-car hole：In the middle part of blank, turning vertically goes out endoporus, and the periphery turning in blank no teeth portion goes out between outer land
Rank, go out interior step in the inner circumferential turning of blank no teeth portion, as shown in Figure 4；
(7) cut groove：The turning of blank periphery go out spaced apart cut groove, and each edge cutting groove is carried out at chamfering
Reason, as shown in Figure 5；
(8) milling boss：The top end face of blank no teeth portion processes boss, and chamfering is carried out to this convex edge of table
Process, as shown in Figure 6；
(9) deburring and surface polishing：With High speed sculpture machine, deburring process is carried out to blank, then use AFM machine to base
Material carries out surface polishing；
(10) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as positive markers
Note, as shown in Figure 7；
(11) it is heat-treated：Heat treatment process includes pretreatment, carburizing and quenching, cleaning and tempering successively, wherein, pretreated
Cheng Wei
First spray 3min, then spray 4min, soak 2min, shake 1min, soak standby 3min, spray 3min, draining
2min, is dried 20min；
Carburizing and quenching process is
It is warming up to 930 DEG C, be incubated 150min；
It is cooled to 860 DEG C with stove, be incubated 30min；
Workpiece is moved to cooling in 80 DEG C of oil groove；
Cleaning process is
After being cooled to room temperature, cleaning removes the carbon black greasy dirt of blank surface；
Drawing process is
Workpiece is warming up to 190 DEG C, is incubated 150min；
Come out of the stove air cooling；
Hardness >=the 90HR15N of blank teeth portion after above-mentioned carburizing and quenching, the hardness >=89HR15N of blank teeth portion after tempering；
The effective case depth of blank surface is 0.40～0.80mm, and when metallography microscope instrument amplifies 100 times, blank is along teeth portion face
Ferrite and bainite in 0.3mm depth bounds content be less than 10%；
(12) fine grinding endoporus and cleaning：Step (11) gained workpiece is carried out refine endoporus process using internal grinder；With
The dirt on hanging type cleaning machine cleaning workpiece surface, that is, obtain target product automobile sprocket wheel.
Embodiment 3：
In the present embodiment, the preparation method of automobile sprocket wheel comprises the following steps：
(1) blanking：The 20CrMo round steel saw bed of φ 40 is cut into needs the blank of length, and blank is two-sided
Made allowance；
(2) annealing and ball blast：First blank is carried out with staged annealing, annealing process detailed process is
First it is warming up to 200 DEG C with stove, be incubated 2 hours；
It is warming up to 600 DEG C with stove again, be incubated 1 hour；
It is warming up to 780 DEG C with stove again, be incubated 8 hours；
It is cooled to 680 DEG C with stove, be incubated 8 hours；
It is cooled to 450 DEG C and less again, come out of the stove；In this temperature-fall period, first with stove cooling, when temperature is down to 550 DEG C,
Open air blast to be lowered the temperature；
After annealing process completes and workpiece is cooled to normal temperature, using Shot Blasting；
Through above-mentioned processing procedure,
The outward appearance non-scale of blank, hardness is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn on centerless grinder the cylindrical-shaped structure of standard；
(4) phospholeum：This process includes procedure below successively
Oil removing, containing percentage by weight being in 6% degreasing agent, temperature be 85 DEG C, pH be 10～12 environment in enter
OK, process time is 7 minutes；
Wash for the first time, the clear water using overflow is carried out to blank at normal temperatures, scavenging period is 1.5min；
Rust cleaning, normal temperature, volume content be 20% hydrochloric acid solution in carry out, process time is 8 minutes；
Wash for second, the clear water using overflow is carried out to blank at normal temperatures, scavenging period is 1.5min, cleaning
It is 6～8 to blank surface pH value；
Surface modulation, containing volume content being in 2 ‰ surface modulation agent solution, pH be 8～9 environment in carry out,
Process time is 0.8 minute；
Phosphatization, containing volume content being in the solution of 6% supply agent LT-620, temperature be to carry out in 80 DEG C of environment,
Process time is that in 20 minutes, and this supply agent LT-620 solution, total acid content is 45～55%, and free acid content is 5～7%；
Third time is washed, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 1.5min；
Saponification, containing volume content being in the solution of 5.5% lubricant, temperature be 75 DEG C, pH be in 8～9 environment
Carry out, process time is 4 minutes；
By above-mentioned processing procedure, first pass through chemical action and form layer protecting film in blank surface, then made by physics
One layer of lubricating film is adhered to outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, under extruding force, squeezes out in blank periphery
Teeth portion, and reserve one section of no teeth portion at blank top, as shown in Figure 3；
(6) in-car hole：In the middle part of blank, turning vertically goes out endoporus, and the periphery turning in blank no teeth portion goes out between outer land
Rank, go out interior step in the inner circumferential turning of blank no teeth portion, as shown in Figure 4；
(7) cut groove：The turning of blank periphery go out spaced apart cut groove, and each edge cutting groove is carried out at chamfering
Reason, as shown in Figure 5；
(8) milling boss：The top end face of blank no teeth portion processes boss, and chamfering is carried out to this convex edge of table
Process, as shown in Figure 6；
(9) deburring and surface polishing：With High speed sculpture machine, deburring process is carried out to blank, then use AFM machine to base
Material carries out surface polishing；
(10) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as positive markers
Note, as shown in Figure 7；
(11) it is heat-treated：Heat treatment process includes pretreatment, carburizing and quenching, cleaning and tempering successively, wherein, pretreated
Cheng Wei
First spray 3min, then spray 4min, soak 2min, shake 1min, soak standby 3min, spray 3min, draining
2min, is dried 20min；
Carburizing and quenching process is
It is warming up to 920 DEG C, be incubated 150min；
It is cooled to 850 DEG C with stove, be incubated 30min；
Workpiece is moved to cooling in 70 DEG C of oil groove；
Cleaning process is
After being cooled to room temperature, cleaning removes the carbon black greasy dirt of blank surface；
Drawing process is
Workpiece is warming up to 180 DEG C, is incubated 150min；
Come out of the stove air cooling；
Hardness >=the 90HR15N of blank teeth portion after above-mentioned carburizing and quenching, the hardness >=89HR15N of blank teeth portion after tempering；
The effective case depth of blank surface is 0.40～0.80mm, and when metallography microscope instrument amplifies 100 times, blank is along teeth portion face
Ferrite and bainite in 0.3mm depth bounds content be less than 10%；
(12) fine grinding endoporus and cleaning：Step (11) gained workpiece is carried out refine endoporus process using internal grinder；With
The dirt on hanging type cleaning machine cleaning workpiece surface, that is, obtain target product automobile sprocket wheel.
Embodiment 4：
In the present embodiment, the preparation method of automobile sprocket wheel comprises the following steps：
(1) blanking：Hollow for the 20CrMo of φ 45 materials in the tube saw bed is cut into needs the blank of length, blank
Two-sided made allowance；
(2) annealing and ball blast：First blank is carried out with staged annealing, annealing process detailed process is
First it is warming up to 200 DEG C with stove, be incubated 2.2 hours；
It is warming up to 600 DEG C with stove again, be incubated 1.2 hours；
It is warming up to 780 DEG C with stove again, be incubated 8.2 hours；
It is cooled to 680 DEG C with stove, be incubated 8.2 hours；
It is cooled to 450 DEG C and less again, come out of the stove；In this temperature-fall period, first with stove cooling, when temperature is down to 550 DEG C,
Open air blast to be lowered the temperature；
After annealing process completes and workpiece is cooled to normal temperature, using Shot Blasting；
Through above-mentioned processing procedure,
The outward appearance non-scale of blank, hardness is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn on centerless grinder the cylindrical-shaped structure of standard；
(4) phospholeum：This process includes procedure below successively
Oil removing, containing percentage by weight being in 6% degreasing agent, temperature be 80 DEG C, pH be 10～12 environment in enter
OK, process time is 5 minutes；
Wash for the first time, the clear water using overflow is carried out to blank at normal temperatures, scavenging period is 1min；
Rust cleaning, normal temperature, volume content be 20% hydrochloric acid solution in carry out, process time is 5 minutes；
Second washes, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 1min, clean to
Blank surface pH value is 6～8；
Surface modulation, containing volume content being in 2 ‰ surface modulation agent solution, pH be 8～9 environment in carry out,
Process time is 0.5 minute；
Phosphatization, containing volume content being in the solution of 6% supply agent LT-620, temperature be to carry out in 75 DEG C of environment,
Process time is that in 15 minutes, and this supply agent LT-620 solution, total acid content is 45～55%, and free acid content is 5～7%；
Third time is washed, and the clear water using overflow is carried out to blank at normal temperatures, and scavenging period is 1min；
Saponification, containing volume content being in the solution of 5% lubricant, temperature be 70 DEG C, pH be 8～9 environment in enter
OK, process time is 3 minutes；
By above-mentioned processing procedure, first pass through chemical action and form layer protecting film in blank surface, then made by physics
One layer of lubricating film is adhered to outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, under extruding force, squeezes out in blank periphery
Teeth portion 1, and reserve one section of no teeth portion 2 at blank top, as shown in Figure 3；
(6) in-car hole：In the middle part of blank, turning vertically goes out endoporus 3, and the periphery turning in blank no teeth portion goes out between outer land
Rank 4, go out interior step 5 in the inner circumferential turning of blank no teeth portion, as shown in Figure 4；
(7) cut groove：The turning of blank periphery go out spaced apart cut groove 6, and each edge cutting groove is carried out at chamfering
Reason, as shown in Figure 5；
(8) draw inside groove：Keyway 9 is processed on the inner hole wall of blank, as shown in Figure 9；
(9) deburring and surface polishing：With High speed sculpture machine, deburring process is carried out to blank, then use AFM machine to base
Material carries out surface polishing；
(10) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as timing marks
8, as shown in Figure 8；
(11) it is heat-treated：Heat treatment process includes pretreatment, carburizing and quenching, cleaning and tempering successively, wherein, pretreated
Cheng Wei
First spray 3min, then spray 4min, soak 2min, shake 1min, soak standby 3min, spray 3min, draining
2min, is dried 20min；
Carburizing and quenching process is
It is warming up to 920 DEG C, be incubated 160min；
It is cooled to 850 DEG C with stove, be incubated 30min；
Workpiece is moved to cooling in 60 DEG C of oil groove；
Cleaning process is
After being cooled to room temperature, cleaning removes the carbon black greasy dirt of blank surface；
Drawing process is
Workpiece is warming up to 180 DEG C, is incubated 160min；
Come out of the stove air cooling；
Hardness >=the 90HR15N of blank teeth portion after above-mentioned carburizing and quenching, the hardness >=89HR15N of blank teeth portion after tempering；
The effective case depth of blank surface is 0.40～0.80mm, and when metallography microscope instrument amplifies 100 times, blank is along teeth portion face
Ferrite and bainite in 0.3mm depth bounds content be less than 10%；
(12) fine grinding endoporus and cleaning：Step (11) gained workpiece is carried out refine endoporus process using internal grinder；With
The dirt on hanging type cleaning machine cleaning workpiece surface, that is, obtain target product automobile sprocket wheel.
Claims (10)
1. a kind of preparation method of automobile sprocket wheel is it is characterised in that comprise the following steps：
(1) blanking：Round steel or hollow materials in the tube are cut into needs the blank of length, the two-sided made allowance of blank；
(2) annealing and ball blast：First blank is carried out making annealing treatment and again Shot Blasting is carried out to it so as to outward appearance non-scale, firmly
Degree is maintained at below HRB80；
(3) straight-through cylindrical：Step (2) gained blank is worn into the cylindrical-shaped structure of standard；
(4) phospholeum：First phosphorating treatment is carried out to blank, form layer protecting film in blank surface；Carry out soap after phosphorating treatment
Change is processed, and forms one layer of lubricating film outside diaphragm；
(5) extrude：Blank after phospholeum is placed in the die of press, squeezes out teeth portion in blank periphery, and on blank top
Portion reserves one section of no teeth portion；
(6) in-car hole：Turning vertically in the middle part of blank goes out endoporus, and blank no teeth portion periphery turning go out outer step,
The inner circumferential turning of blank no teeth portion goes out interior step；
(7) cut groove：Cut groove in the turning of blank periphery, make blank periphery maintain a row or multi-row teeth portion；
(8) locating and machining structure：
Milling boss：The top end face of blank no teeth portion processes boss, and chamfered is carried out to this convex edge of table；Or
Person
Draw inside groove：Keyway is processed on the inner hole wall of blank；
(9) timing marks are processed：One circular hole is processed on any one teeth portion of blank bottom end face as timing marks；
(10) it is heat-treated：Carburizing and quenching and temper are carried out to step (9) gained blank, that is, obtains described automobile sprocket wheel.
2. automobile sprocket wheel according to claim 1 preparation method it is characterised in that：To gained automobile after step (10)
Sprocket wheel carries out refining endoporus and cleaning treatment, makes surface no dirt.
3. automobile sprocket wheel according to claim 1 preparation method it is characterised in that：Described annealing process is ladder
Formula heat up and cooling integrated disposal processing, annealing temperature 200 DEG C and more than.
4. automobile sprocket wheel according to claim 3 preparation method it is characterised in that：The concrete mistake of described annealing process
Cheng Wei
First it is warming up to 200～210 DEG C with stove, be incubated 1.8～2.2 hours；
It is warming up to 600～610 DEG C with stove again, be incubated 0.8～1.2 hour；
It is warming up to 780～790 DEG C with stove again, be incubated 7.8～8.2 hours；
It is cooled to 680～690 DEG C with stove, be incubated 7.8～8.2 hours；
It is cooled to 450 DEG C and less again, come out of the stove.
5. automobile sprocket wheel according to claim 4 preparation method it is characterised in that：It is being cooled to 450 DEG C and less
During, first with stove cooling, when temperature is down to 550 DEG C, opens air blast and lowered the temperature.
6. automobile sprocket wheel according to claim 1 preparation method it is characterised in that：Described annealing process complete and
After workpiece is cooled to normal temperature, carry out Shot Blasting.
7. automobile sprocket wheel according to claim 1 preparation method it is characterised in that：Described phosphorus saponification process includes successively
Oil removing, for the first time washing, rust cleaning, second washing, surface modulation, phosphatization, third time washing and saponification.
8. automobile sprocket wheel according to claim 7 preparation method it is characterised in that：Described oil removal process is containing weight
Amount percentage be 6% degreasing agent in, temperature be 80～95 DEG C, pH be 10～12 environment in carry out；Described descaling process exists
Volume content be 20% hydrochloric acid solution in carry out；Described surface modulation process is in the surface modulation being 2 ‰ containing volume content
In agent solution, pH be 8～9 environment in carry out；Described Phosphating Treatment Process is in the solution being 6% supply agent containing volume content
In, temperature be to carry out in 75～85 DEG C of environment；Described saponification process is in the solution being 5～6% lubricants containing volume content
In, temperature be 70～80 DEG C, pH be 8～9 environment in carry out.
9. automobile sprocket wheel according to claim 1 preparation method it is characterised in that：Described heat treatment process is wrapped successively
Include pretreatment, carburizing and quenching, cleaning and tempering, wherein, the hardness >=90HR15N of described blank teeth portion after carburizing and quenching, tempering
Hardness >=the 89HR15N of described blank teeth portion afterwards.
10. automobile sprocket wheel according to claim 9 preparation method it is characterised in that：Described carburizing and quenching and being tempered
Cheng Wei
It is warming up to 920～930 DEG C, be incubated 150～160min；
It is cooled to 850～860 DEG C with stove, be incubated 30～40min；
Workpiece is moved to cooling in 60～80 DEG C of oil groove；
After being down to room temperature, workpiece is warming up to 180～190 DEG C, is incubated 150～160min；
Come out of the stove air cooling.
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| CN201611013620.4A CN106378594A (en) | 2016-11-17 | 2016-11-17 | Preparing method for automobile chain wheel |
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| CN201611013620.4A CN106378594A (en) | 2016-11-17 | 2016-11-17 | Preparing method for automobile chain wheel |
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| CN201611013620.4A Pending CN106378594A (en) | 2016-11-17 | 2016-11-17 | Preparing method for automobile chain wheel |
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| CN107030453A (en) * | 2017-05-16 | 2017-08-11 | 江苏创精锻有限公司 | The cold-forging technique of clutch sleeve |
| CN108161378A (en) * | 2018-01-18 | 2018-06-15 | 连云港东睦新材料有限公司 | A kind of production technology of transmission system high-precision VCT sprocket wheels |
| CN108188673A (en) * | 2018-02-06 | 2018-06-22 | 山东金马工业集团股份有限公司 | A kind of gear member forging technology for improving product qualification rate |
| CN109420879A (en) * | 2017-08-22 | 2019-03-05 | 徐州徐工履带底盘有限公司 | A kind of crawler belt guide processing method |
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| CN109420879A (en) * | 2017-08-22 | 2019-03-05 | 徐州徐工履带底盘有限公司 | A kind of crawler belt guide processing method |
| CN108161378A (en) * | 2018-01-18 | 2018-06-15 | 连云港东睦新材料有限公司 | A kind of production technology of transmission system high-precision VCT sprocket wheels |
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