CN203356511U - Cold forging mechanism for shaft parts of car double-clutch gearbox and automatic system thereof - Google Patents

Cold forging mechanism for shaft parts of car double-clutch gearbox and automatic system thereof Download PDF

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Publication number
CN203356511U
CN203356511U CN2013203082061U CN201320308206U CN203356511U CN 203356511 U CN203356511 U CN 203356511U CN 2013203082061 U CN2013203082061 U CN 2013203082061U CN 201320308206 U CN201320308206 U CN 201320308206U CN 203356511 U CN203356511 U CN 203356511U
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die
hydraulic
forging
manipulator
cold forging
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张海英
周煊
王以华
何琪海
黄云举
冯杨
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Shanghai Automobile Gear Works
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SHANGHAI BAOJIE VEHICLE PARTS FORGING AND PRESS CO Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0088Lubricating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00Forging presses
    • B21J9/02Special design or construction
    • B21J9/022Special design or construction multi-stage forging presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026Mounting of dies, platens or press rams

Abstract

The utility model discloses a cold forging mechanism for shaft parts of a car double-clutch gearbox and an automatic system of the cold forging mechanism for the shaft parts of the car double-clutch gearbox. The cold forging mechanism for the shaft parts of the car double-clutch gearbox comprises five sets of cold forging devices, wherein the cold forging devices are arranged in a parallel mode, and correspond to a shaping upsetting working step, a forward-backward extrusion necking working step with positive friction, a secondary forward extrusion necking working step, a third forward extrusion working step and a fourth forward extrusion necking working step respectively. The cold forging device used for operation of forward-backward extrusion necking with positive friction is the cold forging device corresponding to the second working step, and comprises a hydraulic system with a positive friction die, an upper die portion connected with the hydraulic system, and a lower die portion with an ejection device, wherein the upper die portion comprises a hydraulic cavity and an upper die mandrel, and the lower die portion comprises a female die and the ejection device. According to the cold forging mechanism for the shaft parts of the car double-clutch gearbox, the direction of a vector of friction between metal and the die is matched with the direction of a vector of the speed of flowing of the metal through the basic principle of the positive friction effect, and the maximum deformation index can be achieved under the condition that maximum threshold friction is provided. The cold forging mechanism for the shaft parts of the car double-clutch gearbox can remarkably improve the use ratio of metal materials, protect the environment, and greatly improve the productivity.

Description

Cold-forging mechanism and automatic system thereof for car double clutch gearbox axle class part
Technical field
The utility model relates to the device in a kind of auto parts and components Cold forging field, specifically a kind of cold-forging mechanism and automatic system thereof for car double clutch gearbox axle class part.
Background technology
Often transmission output shaft is carried out to thermal forging technology production in existing machinery manufacturing industry at home, not only stock utilization is not high for this forging method, precision is hanged down a large amount of machining of needs, also cause environmental pollution, and metal streamline can not perfectly keep.Like this for of paramount importance output shaft class part in speed changer, its mechanical property can not guarantee, production efficiency is low.
Axle class part is the vital part (4 axles of every cover) of automatic gear-box, and demand is large, and the poor efficiency of forge hot is difficult to meet this demand, and design feature is many steps (the machining materials utilization rate is very low), and precision is high; Using energy-efficient cold-forging technique to produce forged shaft will be a main trend of following forging industry.
Through the retrieval to prior art, find, Chinese patent literature CN202137312U, open day 2012-02-08, a kind of cold-extrusion die for output spline shaft of automobile automatic transmission is disclosed, comprise upper bolster and die shoe, be provided with Upper Die-sleeve on upper bolster, be provided with upper mold core in Upper Die-sleeve, the patrix retainer plate is set around Upper Die-sleeve; Below Upper Die-sleeve, correspondence sets gradually die in combination upper cavity die, combination, combination lower cavity die, after matched moulds, and die cavity or the forming surface forming shaped die cavity of die, combination lower cavity die in Upper Die-sleeve, upper mold core, combination upper cavity die, combination; Below the combination lower cavity die, demoulding push rod is set, demoulding push rod is communicated with the die cavity of combination lower cavity die, can stretch in this die cavity.But this technology adopts forge hot to be combined with cold forging, and operation is various, and manpower increases, and energy consumption strengthens, and environment is unfriendly, inefficiency.
Chinese patent literature CN101508004, open day 2009-08-19, a kind of sedan gear-box axle piece cold finish-forging formation method and mould thereof are disclosed, this technology comprises upper and lower die holder, upper and lower liftout attachment, to die unit and fastener thereof, each includes upper and lower mould to die unit, and mold is comprised of upper bush, upper padding plate, upper support cylinder, upper cushion cover, upper cavity die, upper trim ring; Bed die is comprised of lower sleeve, lower bolster, lower support cylinder, lower cushion cover, lower cavity die, lower clamping ring.But this technology is greater than the sedan gear-box axle class part of Allowable Degree for deformation extent, the method must need to be annealed before carrying out the work step that deformation extent is large, pickling and phospholeum processing, and the technology versatility is bad, and environment is also unfriendly.Deformation extent is greater than the sedan gear-box axle class part of Allowable Degree and can't realizes by this technology.
The utility model content
The utility model is for the prior art above shortcomings, a kind of cold-forging mechanism and automatic system thereof for car double clutch gearbox axle class part proposed, utilize the basic principle of positive friction role that friction force vector between metal and mould and the velocity direction of metal flow are matched, under the condition that possesses maximum critical friction power, can reach maximum distortion index.The utility model can significantly improve the metal material utilization rate, environmental friendliness, and greatly improved productivity ratio.
The utility model is achieved through the following technical solutions:
The utility model relates to a kind of cold-forging mechanism for car double clutch gearbox axle class part, by five groups side by side and corresponding respectively: shaping jumping-up, the forging apparatus that is just squeezing necking down, just squeezing necking downs for three times and just squeezing the undergauge work steps for four times with positive and negative crowded necking down, the secondary of active friction form, wherein:
For the positive and negative crowded necking down with active friction, the forging apparatus that the second work step is corresponding comprises: have the hydraulic system of active friction mould, the part of the upper die be connected with hydraulic system and with the part of the lower die of liftout attachment, wherein: part of the upper die comprises hydraulic cavities and patrix mandrel, and part of the lower die comprises die and liftout attachment.
Described patrix mandrel is connected with hydraulic piston, and the bottom of mandrel is provided with rounded grooves, with the backward extrusion working portion for bar after shaping.
Described die comprises: the combination die of double-deck interference fit and the base portion be connected with combination die by elastic parts, wherein: base portion is die plate insert and the second work step base.
The described hydraulic system with active friction mould comprises: oil pressure control, check valve, solenoid directional control valve and oil pump, wherein: the input of solenoid directional control valve is connected with oil pump, the first output is connected with the first hydraulic cavities with check valve successively, the second output is connected with the second hydraulic cavities, and control end is connected with hydraulic control system; Oil pressure control is connected between the first hydraulic cavities and hydraulic control system, for by oil pressure value Real-time Feedback in the first hydraulic cavities to hydraulic control system, so that hydraulic control system provides corresponding instruction.
The input of described check valve is provided with the hydraulic pressure alarm mechanism, this hydraulic pressure alarm mechanism is comprised of hydraulic control one-way valve and overflow valve, after in the first hydraulic cavities, oil pressure arrives threshold value, hydraulic control one-way valve and overflow valve valve open, make fluid flow into oil cylinder, and make oil pressure in the first hydraulic cavities keep constant.
The simple course of work of described hydraulic system is as follows: when press ram moves downward, machine tool control system gives the hydraulic control system signal, and make hydraulic control system that solenoid directional control valve is changed to 1 grade by 0 grade, hydraulic oil enters in the first hydraulic cavities by check valve and promote the patrix mandrel under the oil pressure effect and moves downward fast to the hydraulic cylinder bottom, when in the first hydraulic cavities, oil pressure reaches certain value, oil pressure control feeds back to hydraulic control system by oil pressure value in the first hydraulic cavities, hydraulic control system is now indicated machine tool control system so that press ram moves downward, and solenoid directional control valve is changed to 2 grades by 1 grade, make the relative hydraulic cylinder of patrix mandrel move upward, when the patrix mandrel moves to the hydraulic cylinder top, hydraulic control system is changed to 0 grade by solenoid directional control valve by 2 grades, complete an impulse stroke.
Described elastic parts adopts nitrogen spring to realize.
Just squeezing necking down, just squeezing necking down for three times and just squeezing undergauge four times for secondary, the forging apparatus that the three~five work step is corresponding is traditional forward extrusion mould, comprising: part of the upper die and part of the lower die.
The utility model relates to a kind of automatic system that comprises above-mentioned cold-forging mechanism, comprise: control system and be attached thereto respectively feed mechanism, cold-forging mechanism, manipulator mechanism and the shedding mechanism connect, wherein: feed mechanism, cold-forging mechanism and shedding mechanism connect successively, and manipulator mechanism is arranged at the top of cold-forging mechanism counterdie.
Described feed mechanism comprises: feeding screening plant, with feeding device and the feeding device of sensor, wherein: the position of feeding screening plant is higher than feeding device and by the feeding device, be connected between the two; The examine of diameter mode that adopts feeding sieve materials device realize to the diameter of cylindric blank with quality, test and Output rusults to control system, control system is controlled current blank by the bar quantity in the feeding device and productivity ratio and whether by inspection, is expected mouthful to enter the feeding device according to current; After bar slips into feeding device from the feeding device, the feeding device rotation, make bar rotate to be vertical state by heeling condition, is convenient to the manipulator material folding.
Described shedding mechanism comprises: with the output guide rail of sensor and the rewinding collating unit be attached thereto, wherein: the Action of Gravity Field that forging opens free-falling by manipulator is slipped on output guide rail from cold-forging mechanism, and the rewinding collating unit arranges forging and cases.
Described sensor comprises: trigger mechanism and receiving mechanism, this sensor setting, in the entrance and exit both sides of output guide rail, is added up and is controlled for the bar to passing through in output guide rail or finished product number.
Described manipulator mechanism comprises: the mechanical arm of belt sensor, manipulator and lubricant nozzle, wherein: manipulator and lubricant nozzle are arranged on mechanical arm, manipulator has six pairs, and when mechanical arm stops, the manipulator center of arc line of pairing is identical with five work step cold forging die die cavity center lines.Mechanical arm is in the mould cavity center at a half lubricant nozzle of movement travel, the lubricant of ejection plays effect lubricated and the cleaning iron filings, mechanical arm is provided with sensor, control the distance of manipulator and counterdie, and break down and cause forging crooked or jump out and mould all devices on the emergent stopping production line while rupturing at forging process.
When mechanical arm driving mechanical hand goes downwards to manipulator apart from the about 5mm of counterdie, stop descending, five manipulator while clamping work pieces, then up, up stop rear along mechanical arm rectilinear direction transverse shifting forward, until ejection lubricant when the lubricant nozzle arrives the die cavity top, in this process, mechanical arm continues to move ahead, until the workpiece of a upper work step stops while arriving next work step and the descending workpiece that puts down, patrix moves downward, mechanical arm is also made opening movement simultaneously, and backhaul, completes an impulse stroke.
This course of work with the active friction mold mechanism is as follows: whole part of the upper die is fixed on press ram, slide block on during limit, patrix and die are in separated position, manipulator is placed on the bar after shaping in die, it is descending to open slide block drive patrix that Manipulator Controller gives the machine tool control system signal, when patrix descending and with after the die upper surface of being supported by elastic parts contacts with press ram, patrix is descending together with die, meanwhile, hydraulic control system control the patrix mandrel under the effect of patrix internal hydraulic pressure cylinder with moving downward lower than slide block movement speed, and the speed that makes press ram is more than 1.5 times of patrix mandrel speed, can make like this die inwall friction direction consistent with the direction vector of bar metal flow, thereby become the active friction of favourable distortion, increase substantially the flow of metal ability, meet a work step distortion and reach 67% requirement.
During the slide block backhaul, die moves upward under the effect of elastic parts together with patrix, when elastic parts relaxes while opening fully, patrix separates with die, meanwhile sensor spreads out of following two signals: 1, the effect machine tool control system is done lower push rod and is upwards ejected action, and manipulator takes out the semi-finished product forging in good time and is placed in next work step; 2, the effect hydraulic control system is controlled patrix mandrel quick return, and makes upper mold core axially go up movement velocity to be greater than the patrix opening speed.Move upward to limit with speed with patrix after the backhaul of patrix mandrel finishes, complete an impulse stroke.
Technique effect
The utility model is by having the active friction mould, make the motion by die in the active friction power of blank and die inwall contact position provide, counterdie is motionless, patrix moves downward, die also moves downward, and the movement velocity of die is greater than the metal flow speed with die inwall touching position, thereby make die inwall inwall friction direction consistent with the direction vector of bar metal flow, thereby become the active friction of favourable distortion, become the positive power that promotes metal flow, greatly improve work step deformability of metal, and the dead-metal of contact position reduces, metal streamline is more perfect, can also effectively prevent metal folding and significantly reduce extruding force.
The utility model is realized whole production process human-saving physical resources and financial resources, environmental friendliness, and efficiency is high.
The accompanying drawing explanation
Fig. 1 is the utility model cold-forging mechanism schematic diagram;
Fig. 2 is the forging apparatus schematic diagram with positive friction role;
Fig. 3 is for having active friction die theory figure;
In figure: V kfor combined die moves downward speed; V nfor axle downward movement velocity under hydraulic-driven; τ kfor the unit frictional force that combined die contacts with blank, τ sfor ultimate shearing stress in the flow of metal process, τ ks.
Fig. 4 is the characteristic schematic diagram of the power of utilization active friction power extruding;
In figure: blank material is 20MnCr5; Curve 1:K w=0.5; Curve 2:K w=1.2; ε is deformation extent; The power that Δ P-reduces while using the active friction extruding; P 0for conventional extrusion power.
The cold forging work step figure that Fig. 5 is the embodiment axle.
Fig. 6 is the utility model mechanized production system schematic diagram;
In figure: liftout attachment on 1, 2 active friction mould and hydraulic systems thereof, 3 parts of the upper die, 4 blanks, 5 parts of the lower die, 6 elastic parts, 7 times ejecting mechanisms, 8 hydraulic cylinders, 9 patrix mandrels, 10 die inwalls, 11 oil pressure controls, 12 hydraulic control one-way valves, 13 overflow valves, 14 check valves, 15 solenoid directional control valves, 16 oil pumps, 17 defective material collecting vessels, 18 material selection mechanisms, 19 feeding screening plants, 20 first sensors, 21 second sensors, 22 wheeled Gravitational sliding feeding devices, 23 rotary type feeding devices, 24 mechanical arms, 25 Lubricating oil nozzles, 26 manipulators, 27 blanks and each work step forging, 28 shedding mechanisms, 29 output guide rails, 30 rewinding collating units, 31 second hydraulic cavities, 32 die plate inserts, 33 second work step bases, 34 patrixes, 35 extruding die walls, 36 matrix core shafts.
The specific embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented take technical solutions of the utility model under prerequisite; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
Below will be briefly explained from the following example of having trial-produceed successfully and having put into production.Production equipment is the automatic cold forging forcing press of 1000 tons of Simulation Based On Multi-steps that TaiWan, China Jin Feng company manufactures, and model is KL2-1000.
As shown in Figure 2 and Figure 6, the cold-forging mechanism 0 that the present embodiment relates to, five work steps are side by side and corresponding respectively: shaping jumping-up work step I, the forging apparatus that is just squeezing necking down work step III, just squeezing necking down work step IV for three times and just squeezing undergauge work step V for four times with positive and negative crowded necking down work step II, the secondary of active friction form (referring to Fig. 5), wherein:
For forging apparatus corresponding to the second work step with the positive and negative crowded necking down of active friction, comprise: there is active friction mould and hydraulic system thereof (Fig. 2), the part of the upper die be connected with active friction mould and hydraulic system (Fig. 2) thereof and with the part of the lower die of liftout attachment, wherein: part of the upper die comprises the first hydraulic cavities 8 and patrix mandrel 9, and part of the lower die comprises die and liftout attachment.
Forging apparatus corresponding to the three~five work step that is just squeezing necking down, three just crowded necking downs and four just crowded undergauges for secondary is traditional forward extrusion mould, and comprising: part of the upper die and part of the lower die are the simple combination extrusion die.
Described patrix mandrel 9 is connected as a single entity with hydraulic piston, and the bottom of patrix mandrel 9 is provided with the rounded grooves with draw taper, with the backward extrusion working portion for bar after shaping.
Described die comprises: the combined die 10 of double-deck interference fit and the base portion be connected with die 10 by elastic parts 6, wherein: base portion is the fabricated structure part that base plate and die plate insert form.
Described have the active friction mould and hydraulic system (Fig. 2) comprising: oil pressure control 11, check valve 14, solenoid directional control valve 15 and oil pump 16, wherein: the input of solenoid directional control valve 15 is connected with oil pump 16, the first output is connected with the first hydraulic cavities 8 with check valve 14 successively, the second output is connected with the second hydraulic cavities 31, and control end is connected with hydraulic control system; Oil pressure control 11 is connected between the first hydraulic cavities 8 and hydraulic control system.
The input of described check valve 14 is provided with the hydraulic pressure alarm mechanism, this hydraulic pressure alarm mechanism is comprised of hydraulic control one-way valve 12 and overflow valve 13, after in the first hydraulic cavities, oil pressure arrives threshold value, hydraulic control one-way valve 12 and overflow valve 13 valve opens, make fluid flow into fuel tank, and make the interior oil pressure of the first hydraulic cavities 8 keep constant.
The effect of described oil pressure control 11 is: by the interior oil pressure value Real-time Feedback of the first hydraulic cavities 8 to hydraulic control system, so that hydraulic control system provides various instructions.
The simple course of work of described hydraulic system is as follows: when press ram moves downward, machine tool control system gives the hydraulic control system signal, and make hydraulic control system that solenoid directional control valve 15 is changed to 1 grade by 0 grade, hydraulic oil enters in the first hydraulic cavities 8 by check valve 14 and promote patrix mandrel 9 under the oil pressure effect and moves downward fast to hydraulic cylinder 8 bottoms, when in the first hydraulic cavities, oil pressure reaches certain value, oil pressure control 11 feeds back to hydraulic control system by oil pressure value in the first hydraulic cavities, hydraulic control system is now indicated machine tool control system so that press ram moves downward, and solenoid directional control valve 15 is changed to 2 grades by 1 grade, make the relative hydraulic cylinder 8 of patrix mandrel 9 move upward, when patrix mandrel 9 moves to hydraulic cylinder 8 top, hydraulic control system is changed to 0 grade by solenoid directional control valve 15 by 2 grades, complete an impulse stroke.
Described elastic parts 6 adopts nitrogen spring to realize.
According to this example, comprise there is the active friction mould the cold extruding mechanism design diagram as shown in Figure 1:
The 1st work step is the shaping jumping-up, the bar size irregularity of blanking, and a little jumping-up, reach the purpose of shaping, and deflection is ε d(jumping-up)=5%.
The 2nd work step is the composite extrusion die with active friction, accompanying drawing 2 is shown in by schematic diagram, the course of work is as follows: patrix is contained on press ram, oil pump 16 is opened, make patrix mandrel 9 in high state, when press ram moves downward, solenoid directional control valve 15 is opened 1 grade, make patrix move simultaneously fast with slide block downwards, also make under cylinder pressure drives the downward extrusion metal of patrix mandrel 9 and adjust the speed that patrix mandrel 9 pushes downwards, make ram speed be greater than 1.5 times of patrix mandrel 9 downward extrusion speeds, make like this direction of 10 pairs of bars of die inwall become downwards, form active friction, be beneficial to metal flow, required deformation force reduces more than 20%, improve die life more than 2 times, and can effectively improve deformation extent.During backhaul, patrix moves upward, when separating with die inwall 10, lower push rod is done and is ejected action and solenoid directional control valve 15 is changed to 2 grades, make patrix mandrel 9 quick returns, after 9 backhauls of patrix mandrel complete and while together with patrix, moving to upper limit, solenoid directional control valve 15 is changed to 0 grade, and an impulse stroke that so far has the active friction extrusion die completes.Because this work step deformation extent is ε (anti-squeeze)=63%, ε (just crowded)=67%, by repetition test and simulation, if do not adopt the mould with active friction of the present utility model, be not that extrusion breaks be exactly that working parts of dies damages.Otherwise just needing increases work step, even needs to increase once annealing, pickling, phosphorus saponifying process, and the production of transfer matic can not be carried out continuously.
3rd~5 work steps are necking down, and deformation extent is respectively, ε s3=18.4%, ε s4=16.3%, ε s5=22.5%, all much smaller than permissible value 30~40%, so do not need the techniques such as annealing, pickling, phospholeum before this work step.
Embodiment 2
The present embodiment relates to a kind of mechanized production system that comprises above-mentioned cold-forging mechanism 0, comprise: control system (not shown) and be attached thereto respectively material selection mechanism 18, cold-forging mechanism 0, manipulator 26 and the shedding mechanism 28 connect, wherein: material selection mechanism 18, cold-forging mechanism 0 and shedding mechanism 28 connect successively, and manipulator 26 is arranged at the top of cold forging counterdie.
Described material selection mechanism 18 comprises: feeding screening plant 19, with feeding device 22 and the feeding device 23 of first sensor 20, wherein: the position of feeding screening plant 19 is higher than feeding device 23 and by feeding device 22, be connected between the two; The examine of diameter modes that adopt feeding sieve materials device 19 realize to the diameter of cylindric blank with quality, test and Output rusults to control system, control system is controlled current blank by the bar quantity in feeding device 22 and productivity ratio and whether by inspection, is expected mouthful to enter feeding device 22 according to current; After bar slips into feeding device 23 from feeding device 22, feeding device 23 rotations, make bar rotate to be vertical state by heeling condition, is convenient to manipulator 26 material foldings.
Described shedding mechanism 28 comprises: the rewinding collating unit 30 be attached thereto with the output guide rail 29 of the second sensor 21, wherein: manipulator 26 opens forging 27 and is slipped to from cold-forging mechanism on output guide rail 29 due to the Action of Gravity Field of free-falling, and rewinding collating unit 30 arranges forging 27 case.
Described manipulator mechanism 26 comprises: mechanical arm 24, manipulator 26 and Lubricating oil nozzle 25, wherein: manipulator 26 is arranged on mechanical arm with Lubricating oil nozzle 25, manipulator 26 has six pairs, and when mechanical arm stops, manipulator 26 center of arc's lines of pairing are identical with five work step cold forging die die cavity center lines.Mechanical arm is in the mould cavity center at a half Lubricating oil nozzle 25 of movement travel, the oil gas of ejection plays effect lubricated and the cleaning iron filings, mechanical arm 24 is provided with the 3rd sensor (not shown), control the distance of manipulator 26 and counterdie, and break down and cause forging crooked or jump out and all devices on the emergent stopping production line during mould fracture at forging process.
When mechanical arm driving mechanical hand 26 goes downwards to manipulator 26 apart from the about 5mm of counterdie, stop descending, five 26 while of manipulator clamping work pieces, then up, up stop rear along mechanical arm rectilinear direction transverse shifting forward, until ejection oil gas when Lubricating oil nozzle 25 arrives the die cavity top, in this process, mechanical arm continues to move ahead, until the workpiece of a upper work step stops while arriving next work step and the descending workpiece that puts down, patrix moves downward, mechanical arm is also made opening movement simultaneously, and backhaul, completes an impulse stroke.
Be provided with successively wheeled Gravitational sliding feeding device 22 and rotary type feeding device 23 between described feeding mechanism 18 and cold-forging mechanism 0, make the blank charging efficiency be further enhanced.
The course of work of this active friction mold mechanism is as follows: whole part of the upper die is fixed on press ram, slide block on during limit, patrix and die are in separated position, manipulator 26 is placed on the bar after shaping in die, it is descending to open slide block drive patrix that manipulator 26 controllers give the machine tool control system signal, when patrix descending and with after the die upper surface of being supported by elastic parts 6 contacts with press ram, patrix is descending together with die, meanwhile, hydraulic control system control patrix mandrel 9 under the effect of patrix internal hydraulic pressure cylinder 8 with moving downward lower than slide block movement speed, and the speed that makes press ram is more than 1.5 times of patrix mandrel speed, can make like this frictional force of pushing 10 pairs of bars of die wall become effective friction of favourable distortion, increase substantially the flow of metal ability, meet a work step distortion and reach 67% requirement.
During the slide block backhaul, extruding die wall 10 moves upward under the effect of elastic parts 6 together with patrix, when elastic parts 6 relaxes while opening fully, patrix separates with die, meanwhile hydraulic control system spreads out of following two signals: 1, the effect machine tool control system makes lower push rod upwards eject action, and manipulator 26 takes out the semi-finished product forging in good time and is placed in next work step; 2, control patrix mandrel 9 quick returns, and make patrix mandrel 9 speed of moving upward be greater than the patrix opening speed.Move upward to limit with speed with patrix after the upper mold core backhaul finishes, complete an impulse stroke.
As shown in Figure 4, curve 1 is actual measured value, when deformation extent reaches 70%, with conventional extrusion, compares, and extruding force can reduce by 28%.Kinetic coefficient (referring to Fig. 3,4):
Figure BDA00003274469500071
wherein: v kcorresponding combined die moves downward speed, and v-corresponding extruding metal speed, with relational expression (in formula, λ and ε are corresponding extends and the deformation extent coefficient simultaneous; τ kfor the unit frictional force that combined die contacts with blank, τ s--ultimate shearing stress in the flow of metal process).Consider the kinetic character in extrusion process, use following formula computational dynamics coefficient:
Figure BDA00003274469500081
wherein: v nfor axle downward movement velocity under hydraulic-driven.With conventional extrusion, compare, deformation force can reduce 20~30%, and the punch life-span is improved 2~3 times.Through overtesting, the scope of best power source coefficient is 1.05≤K w<1.3.
Through actual the detection, find, this device is compared unlubricated extruding, and dead-metal reduces, and streamline is more reasonable, can also effectively avoid metal folding, and extruding force also reduces more than 20%.
This mechanized production system operating efficiency and traditional handicraft relatively see the following form:
Table 1 car output shaft is conventional to be produced and the transfer matic comparision of production
Figure BDA00003274469500082

Claims (10)

1. the cold-forging mechanism for car double clutch gearbox axle class part, it is characterized in that, arranged side by side and corresponding respectively by five groups: the shaping jumping-up, positive and negative crowded necking down with active friction, secondary is just squeezing necking down, the forging apparatus that is just squeezing necking down and four just crowded undergauge work steps for three times forms, wherein: for the positive and negative crowded necking down with active friction, the forging apparatus that the second work step is corresponding comprises: the hydraulic system with active friction mould, the part of the upper die be connected with hydraulic system and with the part of the lower die of liftout attachment, wherein: part of the upper die comprises hydraulic cavities and patrix mandrel, part of the lower die comprises die and liftout attachment.
?
2. mechanism according to claim 1, is characterized in that, described patrix mandrel is connected with hydraulic piston, and the bottom of mandrel is provided with rounded grooves, with the backward extrusion working portion for bar after shaping.
3. mechanism according to claim 1, is characterized in that, described die comprises: the combination die of double-deck interference fit and the base portion be connected with combination die by elastic parts, wherein: base portion is die plate insert and the second work step base.
4. mechanism according to claim 1, it is characterized in that, the described hydraulic system with active friction mould comprises: oil pressure control, check valve, solenoid directional control valve and oil pump, wherein: the input of solenoid directional control valve is connected with oil pump, the first output is connected with the first hydraulic cavities with check valve successively, the second output is connected with the second hydraulic cavities, and control end is connected with hydraulic control system; Oil pressure control is connected between the first hydraulic cavities and hydraulic control system, for by oil pressure value Real-time Feedback in the first hydraulic cavities to hydraulic control system, so that hydraulic control system provides corresponding instruction.
5. mechanism according to claim 4, it is characterized in that, the input of described check valve is provided with the hydraulic pressure alarm mechanism, this hydraulic pressure alarm mechanism is comprised of hydraulic control one-way valve and overflow valve, after in the first hydraulic cavities, oil pressure arrives threshold value, hydraulic control one-way valve and overflow valve valve open, make fluid flow into oil cylinder, and make oil pressure in the first hydraulic cavities keep constant.
6. an automatic system that comprises arbitrary described cold-forging mechanism in claim 1-5, it is characterized in that, comprise: control system and be attached thereto respectively feed mechanism, cold-forging mechanism, manipulator mechanism and the shedding mechanism connect, wherein: feed mechanism, cold-forging mechanism and shedding mechanism connect successively, and manipulator mechanism is arranged at the top of cold-forging mechanism counterdie.
7. system according to claim 6, it is characterized in that, described feed mechanism comprises: feeding screening plant, with feeding device and the feeding device of sensor, wherein: the position of feeding screening plant is higher than feeding device and by the feeding device, be connected between the two; The examine of diameter mode that adopts feeding sieve materials device realize to the diameter of cylindric blank with quality, test and Output rusults to control system, control system is controlled current blank by the bar quantity in the feeding device and productivity ratio and whether by inspection, is expected mouthful to enter the feeding device according to current; After bar slips into feeding device from the feeding device, the feeding device rotation, make bar rotate to be vertical state by heeling condition, is convenient to the manipulator material folding.
8. system according to claim 6, it is characterized in that, described shedding mechanism comprises: with the output guide rail of sensor and the rewinding collating unit be attached thereto, wherein: the Action of Gravity Field that forging opens free-falling by manipulator is slipped on output guide rail from cold-forging mechanism, and the rewinding collating unit arranges forging and cases.
9. system according to claim 6, it is characterized in that, described manipulator mechanism comprises: the mechanical arm of belt sensor, manipulator and lubricant nozzle, wherein: manipulator and lubricant nozzle are arranged on mechanical arm, manipulator has six pairs, and when mechanical arm stops, the manipulator center of arc line of pairing is identical with five work step cold forging die die cavity center lines; Mechanical arm is in the mould cavity center at a half lubricant nozzle of movement travel, the lubricant of ejection plays effect lubricated and the cleaning iron filings, mechanical arm is provided with sensor, control the distance of manipulator and counterdie, and break down and cause forging crooked or jump out and mould all devices on the emergent stopping production line while rupturing at forging process.
10. system according to claim 8, it is characterized in that, described sensor comprises: trigger mechanism and receiving mechanism, this sensor setting, in the entrance and exit both sides of output guide rail, is added up and is controlled for the bar to passing through in output guide rail or finished product number.
CN2013203082061U 2013-05-30 2013-05-30 Cold forging mechanism for shaft parts of car double-clutch gearbox and automatic system thereof Expired - Lifetime CN203356511U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103240378A (en) * 2013-05-30 2013-08-14 上海保捷汽车零部件锻压有限公司 Cold-forging mechanism for shaft parts of sedan double clutch transmission, and automatic system of cold-forging mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103240378A (en) * 2013-05-30 2013-08-14 上海保捷汽车零部件锻压有限公司 Cold-forging mechanism for shaft parts of sedan double clutch transmission, and automatic system of cold-forging mechanism
CN103240378B (en) * 2013-05-30 2015-01-07 上海保捷汽车零部件锻压有限公司 Cold-forging mechanism for shaft parts of sedan double clutch transmission, and automatic system of cold-forging mechanism

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