CN102886466B - Overall composite inner high-pressure flow type bulging device for car drive axle - Google Patents
Overall composite inner high-pressure flow type bulging device for car drive axle Download PDFInfo
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- CN102886466B CN102886466B CN201210357526.6A CN201210357526A CN102886466B CN 102886466 B CN102886466 B CN 102886466B CN 201210357526 A CN201210357526 A CN 201210357526A CN 102886466 B CN102886466 B CN 102886466B
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Abstract
The invention relates to an overall composite inner high-pressure flow type bulging device for a car drive axle. The bulging device comprises a bulging inner die, a bulging outer die and two thrust hydraulic cylinders, wherein the bulging inner die comprises an upper die block and a lower die block, and a multi-stage high-pressure flow type hydraulic cylinder is arranged between the upper die block and the lower die block. Two ends of the upper die block and the lower die block are respectively hinged with the piston rods of the two thrust hydraulic cylinders through link mechanisms. The multi-stage high-pressure flow type hydraulic cylinder comprises a high-pressure piston rod and at least two stages of high-pressure hydraulic cylinder bodies which are stacked and sheathed and adopt a telescopic structure, and the high-pressure piston rod is sheathed on the innermost layer of auxiliary hydraulic cylinder body. Oil ports connected with a hydraulic source are arranged in a piston rod chamber and a grading oil chamber of the multi-stage high-pressure flow type hydraulic cylinder, and two circulating oil ports are arranged in a rodless chamber. The bulging outer die comprises a support mechanism positioned on the transitional surface of an axle shell pipa bag. The piston rods of the two thrust hydraulic cylinders are oppositely arranged, and the axes of the two piston rods are positioned on the same one straight line. Moreover, a quick-detached connecting structure is arranged on the piston rod of one thrust hydraulic cylinder.
Description
Technical field
The invention belongs to mechanical-moulded processing technique field, concrete is the compound inner high voltage flow-type bulging device of a kind of automobile drive axle entirety.
Background technology
Auto manufacturing has very important effect in Chinese national economy, in recent years, the national economy high speed development of China, meanwhile auto industry is also flourish.Performance from vehicle complete vehicle to parts, all become the major subjects of current industrial research, and axle housing is as one of strength member of automobile, axle housing not only plays supporting role to automobile, but also is differential mechanism, main reducing gear and the shell that drives wheel drive.Automobile axle housing quality is very large on the impact of vehicle performance, and axle housing not only needs to possess enough intensity, rigidity and fatigue life, but also should be simple in structure, and cost is lower, and quality is light, is easy to dismounting and maintenance.
Automobile axle housing forming method mainly contains following several, and its pluses and minuses are as follows:
Cast shaping process
Advantage: the easily axle housing of the complex-shaped and wall unevenness of cast form, rigidity, intensity are larger;
Shortcoming: control shaping flow difficulties, easily crack, pore, and weight is large, following process complexity, welding sequence easily cracks, is out of shape;
The scope of application: the rear axle housing that is mainly applicable to Medium or severe type truck is produced.
Punching press-welding fabrication technique
Advantage: good manufacturability, percent defective is lower, and reliability is high, easily manufactures, and allowance is little, and quality is light, and precision is high, and price is lower, and product remodeling is convenient, easily realizes the production automation;
Shortcoming: operation is various, the axle housing that is only applicable to simple geometry is produced, and the axle housing intensity that production obtains is lower, and cost is large; Also have welding requirements in addition highly, difficult quality guarantee, easily cracks, the defect of distortion, small opening, and weld zone easy territory fatigue fracture;
The scope of application: the scope of application is wider, is generally used for Light-duty Vehicle, agricultural vehicle.
Expansion is shaped
Advantage: expanding and shaping technique is the derivation of punching press-welding fabrication technique, but its workload minimizing, working (machining) efficiency is high, good airproof performance, the Rigidity and strength of the axle housing obtaining is high, lightweight;
Shortcoming: the place of longitudinally cracking easily produces transversal crack, and Chinese lute bag place flange width is inhomogeneous, and side creases easily and pulls;
The scope of application: be mainly applicable to car, light, medium-duty truck.
Machinery bulging
Advantage: workload reduces, and working (machining) efficiency is high, and the back axle obtaining is lightweight, can higher, the complex-shaped axle housing of production size, and blank utilization rate and production efficiency all higher, the comprehensive mechanical property of back axle is high;
Shortcoming: bulging power is difficult to control, and bulging mechanism and process complexity, easily crack;
The scope of application: be mainly applicable to passenger car and light medium truck.
Hydraulic expanding-forming
Advantage: stock utilization is high, operation is few, and production efficiency is high, and the axle housing strength and stiffness that obtain are high and lightweight, easily realize production mechanization and automated production;
Shortcoming: technique is still not overripened, high to the requirement of high pressure liquid potential source, easy oil leakage and contaminated environment, expend time in and fund initial stage of investment;
The scope of application: car, light-duty and medium-duty truck.
To sum up, the actual production of axle housing requires to minimize cost, and ensures its mechanical performance, also will shorten the R&D cycle simultaneously as far as possible, and this just needs the research of new technology, new technology to promote the fast development of axle housing manufacturing process.
For the pluses and minuses of existing automobile axle housing manufacturing process, and in conjunction with China's practical application present situation, the processing and forming technology of existing automobile drive axle rear axle housing mainly contains subject matter and deficiency:
1, the axle housing manufacturing process of China's practical application major part is cast shaping process and punching press-welding fabrication technique, and other forming method is due to technology, economic dispatch reason, applies lessly, or is in the development test stage;
2, the bulging power of mechanical bulging is difficult to control, and bulging mechanism and process complexity, easily crack, but blank utilization rate, production efficiency, comprehensive mechanical property are high;
3, hydraulic bulging process is still not overripened, high to the requirement of high pressure liquid potential source, easy oil leakage and contaminated environment, and the initial stage expends time in and fund, but the axle housing strength and stiffness that obtain are high, lightweight, easily realize production mechanization and automation.
In view of this, the present invention is intended to explore the compound inner high voltage flow-type bulging device of a kind of automobile drive axle entirety, by adopting this bulging device, can control preferably the overall process of the continuous bulging of automobile drive axle, have advantages of that blank utilization rate and production efficiency are all higher, the vehicle driving axle housing wall thickness obtaining evenly, dimensional accuracy is higher, weight is less, strength and stiffness are all higher, and have good fatigue life, can effectively ensure automobile drive axle assembling, instructions for use.
Summary of the invention
The technical problem to be solved in the present invention is to propose the compound inner high voltage flow-type bulging device of a kind of automobile drive axle entirety, can control preferably the overall process of the continuous bulging of automobile drive axle, can meet the Production requirement of automobile drive axle bulging.
Realize above-mentioned technical purpose, the compound inner high voltage flow-type bulging device of automobile drive axle of the present invention entirety, comprises bulging internal mold, bulging external mold and lays respectively at bulging internal mold two ends and for two thrust hydraulic cylinders of auxiliary mold clamping force are provided;
Described bulging internal mold comprises respectively wraps with bridge casing lute upper module and the lower module that lower both sides inwall coordinates, between described upper module and lower module, be provided with the multistage high pressure flow formula hydraulic cylinder that at least one acts on upper module and lower module and bulging hydraulic coupling is provided, the two ends of described upper module and lower module are articulated and connected by the piston rod of linkage and two thrust hydraulic cylinders respectively;
Described multistage high pressure flow formula hydraulic cylinder comprises high-pressure piston rod and the stacked high pressure liquid cylinder pressure cylinder body that is set in together and is stretching structure of two-stage at least, described high-pressure piston rod is sleeved on the high pressure liquid cylinder pressure cylinder body of innermost layer, between outermost high pressure liquid cylinder pressure cylinder body and high-pressure piston rod, form rodless cavity, between the high pressure liquid cylinder pressure cylinder body of innermost layer and high-pressure piston rod, form rod end chamber, between adjacent two-stage hydraulic cylinder body, form classification oil pocket, described rod end chamber is equipped with on classification oil pocket the hydraulic fluid port being connected with hydraulic power source, described rodless cavity is provided with two circulation hydraulic fluid ports for hydraulic oil circulation,
Described bulging external mold comprises the supporting mechanism for pushing down the transition face between bulging deformed area and the non-deformation zone of bridge casing lute bag;
The piston rod of described two thrust hydraulic cylinders arranges in opposite directions, and the axis of two-piston bar is located on the same line, and the piston rod of one of them thrust hydraulic cylinder is provided with quick-detachment syndeton.
Further, between adjacent two-stage hydraulic cylinder body and between high-pressure piston rod and innermost layer hydraulic cylinder body, the top that is positioned at outer field hydraulic cylinder body is provided with the inner baffle ring extending radially inwardly, the bottom that is positioned at the high-pressure piston rod of internal layer is provided with the outer baffle ring extending radially outwardly and coordinate with inner baffle ring, between the periphery wall of described inner baffle ring and internal layer hydraulic cylinder body, be provided with hermetically-sealed construction, between described outer baffle ring and the internal perisporium of outer hydraulic cylinder body, be provided with hermetically-sealed construction.
Further, described hydraulic fluid port is arranged on described inner baffle ring, and two circulation hydraulic fluid ports that are arranged on described rodless cavity are separately positioned on outermost layer hydraulic cylinder body bottom and high-pressure piston rod.
Further, described linkage comprises the hinge seat being fixedly mounted on thrust hydraulic cylinder piston rod, between described hinge seat and described upper module and lower module, is articulated and connected respectively by two hinge bars.
Further, logical centre bore during the piston rod that the thrust hydraulic cylinder of quick-detachment syndeton is not set is provided with, and on the cylinder body of this thrust hydraulic cylinder with on the hinge seat being connected with this thrust hydraulic cylinder, be equipped with the through hole coaxial with centre bore, in described centre bore and through hole, be provided with the hollow tube for the hydraulic oil pipe between described hydraulic fluid port and hydraulic power source and between circulation hydraulic fluid port and hydraulic power source is installed.
Further, described bulging external mold also comprises support, and described supporting mechanism comprises rack-mount support bar and be arranged on the supporting member on support bar, and described supporting member is pressed on described transition face.
Further, described supporting member is the curved surface coordinating with described transition face with the contact-making surface of axle housing workpiece.
Further, described supporting member is set to 4, and lays respectively at the both sides up and down of the two ends transition face of described bridge casing lute bag.
Further, described bulging external mold comprises external mold and lower external mold, described upper external mold wraps with being respectively equipped with on lower external mold with described bridge casing lute upper cavity and the lower mode cavity that lower both sides outer wall shape and structure is identical, described supporting mechanism be described upper cavity and lower mode cavity respectively the upper cavity corresponding with bridge casing lute bag transition face support inwall and lower mode cavity supports inwall.
Further, when described upper external mold and lower external mold are closed, described upper cavity and the lower mode cavity composition bulging chamber identical with the outer wall shape and structure of bridge casing lute bag.
Beneficial effect of the present invention is:
The compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present invention before use, first the quick-detachment syndeton being arranged on one of them thrust hydraulic cylinder piston rod is separated, bulging internal mold is placed in and is got stuck in workpiece, and then this thrust hydraulic cylinder piston rod is connected by quick-detachment syndeton;
By being arranged on the multistage high pressure flow formula hydraulic cylinder between upper module and lower module, provide bulging hydraulic coupling to upper module and lower module, respectively to the upper and lower both sides of axle housing workpiece separately, extruding axle housing workpiece, realizes bulging for upper module and lower module; By being provided with thrust hydraulic cylinder at the two ends of bulging internal mold, in the process of bulging, provide augmented thrust, augmented thrust is decomposed into and acts on upper module and augmented thrust vertical stress component component parallel with augmented thrust on lower module under the effect of linkage, the direction of augmented thrust vertical stress component is perpendicular to axle housing workpiece axial direction, the direction of the parallel component of augmented thrust is parallel to axle housing workpiece axial direction, the parallel component of augmented thrust can prevent the occurrence positions skew in Bulging Process of upper module and lower module, ensures the quality of the bridge casing lute bag obtaining after bulging; By bulging external mold is set, can accurately control the position of axle housing workpiece bulging distortion, control axle housing workpiece and start bulging distortion at transition face place, so just can realize the bulging of bridge casing lute bag;
Because the diameter of bore of the axle housing workpiece for the production of automobile drive axle housing is generally all less, and bridge casing lute bag is larger to the distortion ratio of both sides bulging distortion, traditional hydraulic cylinder not only cannot meet the requirement of installing and using in little space, and cannot provide and meet the required hydraulic coupling stroke of deflection; Multistage high pressure flow formula hydraulic cylinder of the present invention, be set to stacked be set in together at least two-layer mutually by high pressure liquid cylinder pressure cylinder body, not only can effectively dwindle required space is installed, and form stretching structure between high pressure liquid cylinder pressure cylinder body, by elongation and the shortening of high pressure liquid cylinder pressure cylinder body, the hydraulic coupling stroke that can effectively improve multistage high pressure flow formula hydraulic cylinder, can meet instructions for use;
In the bulging production process of automobile drive axle housing, generally need to heat axle housing workpiece, to improve the plastic deformation ability of axle housing workpiece, and reduce axle housing workpiece bulging and be out of shape required bulging power, the temperature of heating is generally 200-600 DEG C of left and right, but because hydraulic oil at high temperature can go bad, may cause the bulging hydraulic coupling of multistage high pressure flow formula hydraulic cylinder output not enough or unstable, cause bulging to carry out, multistage high pressure flow formula hydraulic cylinder of the present invention by being provided for two circulation hydraulic fluid ports of hydraulic oil circulation in rodless cavity, high pressure liquid force feed enters rodless cavity from one of them circulation hydraulic fluid port, and flow out rodless cavity from another circulation hydraulic fluid port, when required hydraulic coupling is provided, make hydraulic oil keep the circulation of given pace, prevent analysis of hydraulic oil overheat.
Brief description of the drawings
Fig. 1 is the structural representation of the compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present invention the first embodiment after workpiece bulging has been out of shape;
Fig. 2 is the structural representation of the overall compound inner high voltage flow-type bulging device of the automobile drive axle of the present embodiment before the distortion of workpiece bulging;
Fig. 3 is bulging internal model structure schematic diagram;
Fig. 4 is the structural representation of multistage high pressure flow formula hydraulic cylinder;
Fig. 5 is the structural representation of the compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present invention the second embodiment after workpiece bulging has been out of shape;
Fig. 6 is the structural representation of the overall compound inner high voltage flow-type bulging device of the automobile drive axle of the present embodiment before the distortion of workpiece bulging.
Description of reference numerals:
1-bulging internal mold; 1a-upper module; 1b-lower module; 2-bulging external mold; 3-thrust hydraulic cylinder; 4-thrust hydraulic cylinder; 5-axle housing workpiece; 5a-bridge casing lute bag; 5b-transition face; The multistage high pressure flow formula of 6-hydraulic cylinder; 6a-high-pressure piston rod; 6b-high pressure liquid cylinder pressure cylinder body; 6c-rodless cavity; 6d-rod end chamber; 6e-classification oil pocket; 6f-hydraulic fluid port; 6g-inner baffle ring; 6h-outer baffle ring; The 6i-hydraulic fluid port that circulates; The 6j-hydraulic fluid port that circulates; 7-hinge seat; The two hinge bars of 8-; 9-support; 10-support bar; 11-supporting member; 12-hollow tube; The upper external mold of 13-; 13a-upper cavity; 13b-upper cavity supports inwall; External mold under 14-; 14a-lower mode cavity; 14b-lower mode cavity supports inwall.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
The first embodiment
As shown in Figure 1, be the structural representation of the compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present invention the first embodiment after workpiece bulging has been out of shape.
The compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present embodiment, comprises bulging internal mold 1, bulging external mold 2 and lays respectively at bulging internal mold 1 two ends and for thrust hydraulic cylinder 3 and the thrust hydraulic cylinder 4 of auxiliary mold clamping force are provided.
As shown in Figure 3, bulging internal mold 1 comprises the upper module 1a and the lower module 1b that coordinate with the upper and lower both sides of bridge casing lute bag 5a inwall respectively, between upper module 1a and lower module 1b, be provided with the multistage high pressure flow formula hydraulic cylinder 6 that at least one acts on upper module 1a and lower module 1b and go up and provide bulging hydraulic coupling, the two ends of upper module 1a and lower module 1b are articulated and connected by the piston rod of linkage and thrust hydraulic cylinder 3 and thrust hydraulic cylinder 4 respectively, as shown in Figure 1, the thrust hydraulic cylinder 3 of the present embodiment is positioned at the left side of bulging internal mold 1, thrust hydraulic cylinder 4 is positioned at the right side of bulging internal mold 1.Preferably, linkage comprises the hinge seat 7 being fixedly mounted on thrust hydraulic cylinder piston rod, between hinge seat 7 and upper module 1a and lower module 1b, be articulated and connected by two hinge bars 8 respectively, adopt the linkage of this structure, between two hinge bars 8 and the piston rod of thrust hydraulic cylinder, there is angle, thrust hydraulic cylinder 3 and the augmented thrust of thrust hydraulic cylinder 4 can be decomposed into to act on upper module 1a and lower module 1b upper and perpendicular to the augmented thrust vertical stress component and the parallel component of augmented thrust that is parallel to axle housing workpiece axial direction of axle housing workpiece axial direction, and be accompanied by the increase of axle housing workpiece bulging deflection, angle between two hinge bars 8 and the thrust hydraulic cylinder piston rod of linkage increases, can increase augmented thrust vertical stress component.
Bulging external mold 2 comprises the supporting mechanism for pushing down the transition face 5b between bulging deformed area and the non-deformation zone of bridge casing lute bag 5a.As depicted in figs. 1 and 2, the bulging external mold 2 of the present embodiment also comprises support 9, supporting mechanism comprises the support bar 10 being arranged on support 9 and is arranged on the supporting member 11 on support bar 10, the supporting member 11 of the present embodiment is set to 4, and lays respectively at the both sides up and down of the two ends transition face 5b of bridge casing lute bag 5a.It is upper that supporting member 11 is pressed in transition face 5b, by adopting the bulging external mold 2 of this structure, pushes down transition face 5b by supporting member 11, can control the deformed region of bridge casing lute bag 5a in bulging deformation process, prevents other region deformations of workpiece.Preferably, supporting member 11 is the curved surface coordinating with transition face 5b with the contact-making surface of axle housing workpiece 5, can prevent that transition face 5b is because distortion produces fold.
The piston rod of thrust hydraulic cylinder 3 and thrust hydraulic cylinder 4 arranges in opposite directions, the axis of two-piston bar is located on the same line, and the piston rod of one of them thrust hydraulic cylinder is provided with quick-detachment syndeton, the quick-detachment syndeton of the present embodiment is arranged on the piston rod of thrust hydraulic cylinder 4.By quick-detachment syndeton is set, the piston rod of thrust hydraulic cylinder 4 and bulging internal mold 1, thrust hydraulic cylinder 3 can be separated, be convenient to before bulging, bulging internal mold 1 is positioned in the endoporus of axle housing workpiece 5.
As shown in Figure 4, multistage high pressure flow formula hydraulic cylinder 6 comprises high-pressure piston rod 6a and the stacked high pressure liquid cylinder pressure cylinder body 6b that is set in together and is stretching structure of two-stage at least, high-pressure piston rod 6a is sleeved on the high pressure liquid cylinder pressure cylinder body 6b of innermost layer, between outermost high pressure liquid cylinder pressure cylinder body 6b and high-pressure piston rod 6a, form rodless cavity 6c, between the high pressure liquid cylinder pressure cylinder body 6b of innermost layer and high-pressure piston rod 6a, form rod end chamber 6d, between adjacent two-stage hydraulic cylinder body 6b, form classification oil pocket 6e, rod end chamber 6d is equipped with on classification oil pocket 6e the hydraulic fluid port 6f being connected with hydraulic power source, rodless cavity 6c is provided with for the circulation hydraulic fluid port 6i of hydraulic oil circulation and circulation hydraulic fluid port 6j.As shown in Figure 1, the multistage high pressure flow formula hydraulic cylinder 6 of the present embodiment is set to 2, between the outermost layer high pressure liquid cylinder pressure cylinder body 6b of one of them multistage high pressure flow formula hydraulic cylinder 6 and lower module 1b, be threaded connection structure and be fixedly connected with, high-pressure piston rod 6a is fixedly mounted on upper module 1a by threaded fastener; Between the outermost layer high pressure liquid cylinder pressure cylinder body 6b of another multistage high pressure flow formula hydraulic cylinder 6 and upper module 1a, be threaded connection structure and be fixedly connected with, high-pressure piston rod 6a is fixedly mounted on lower module 1b by threaded fastener.The multistage high pressure flow formula hydraulic cylinder 6 of the present embodiment comprises three grades of stacked high pressure liquid cylinder pressure cylinder body 6b that are set in together and are stretching structure.
Adopt the multistage high pressure flow formula hydraulic cylinder 6 of this structure, outwards provide in the process of hydraulic thrust at piston rod 6a, rodless cavity 6c provides the hydraulic oil of circulation, and rod end chamber 6d and the equal oil return of classification oil pocket 6e can realize multistage high pressure flow formula hydraulic cylinder 6 elongations and hydraulic coupling is outwards provided; In like manner, in the time that piston rod 6a bounces back, rodless cavity 6c oil return, rod end chamber 6d and the equal oil-feed of classification oil pocket 6e, can realize piston rod 6a retraction.
The compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present embodiment before use, first the quick-detachment syndeton being arranged on thrust hydraulic cylinder 4 piston rods is separated, bulging internal mold 1 is placed in axle housing workpiece 5, and then these thrust hydraulic cylinder 4 piston rods are connected by quick-detachment syndeton, carry out the preparation of axle housing workpiece 5 bulging distortion.
By being arranged on the multistage high pressure flow formula hydraulic cylinder 6 between upper module 1a and lower module 1b, multistage high pressure flow formula hydraulic cylinder 6 provides bulging hydraulic coupling to upper module 1a and lower module 1b, upper module 1a and lower module 1b separate both sides Shang Xia 5 to axle housing workpiece respectively, extruding axle housing workpiece 5, realizes bulging.By thrust hydraulic cylinder 3 and thrust hydraulic cylinder 4 are set at the two ends of bulging internal mold 1, in the process of bulging, provide augmented thrust, augmented thrust is decomposed into and acts on upper module 1a with on lower module 1b and the augmented thrust vertical stress component vertical with axle housing workpiece 5 axial directions and the augmented thrust parallel component parallel with axle housing workpiece 5 axial directions under the effect of linkage, the parallel component of augmented thrust can prevent upper module 1a and lower module 1b occurrence positions skew in Bulging Process, ensures the quality of the bridge casing lute bag 5a obtaining after bulging.By bulging external mold 2 is set, can accurately control the position of axle housing workpiece 5 bulging distortion, control axle housing workpiece 5 and start bulging distortion at transition face 5b place, so just can realize the bulging of bridge casing lute bag.
Because the diameter of bore of the axle housing workpiece 5 for the production of automobile drive axle housing is generally all less, and bridge casing lute bag 5a is larger to the distortion ratio of both sides bulging distortion, traditional hydraulic cylinder not only cannot meet the requirement of installing and using in little space, and cannot provide and meet the required hydraulic coupling stroke of deflection.The multistage high pressure flow formula hydraulic cylinder 6 of the present embodiment, be set to stacked be set in together at least two-layer mutually by high pressure liquid cylinder pressure cylinder body 6b, not only can effectively dwindle required space is installed, and form stretching structure between high pressure liquid cylinder pressure cylinder body 6b, by elongation and the shortening of high pressure liquid cylinder pressure cylinder body 6b, the hydraulic coupling stroke that can effectively improve multistage high pressure flow formula hydraulic cylinder 6, can meet instructions for use.
In the bulging production process of automobile drive axle housing, generally need to heat axle housing workpiece 5, to improve the plastic deformation ability of axle housing workpiece 5, and reduce axle housing workpiece 5 bulgings and be out of shape required bulging power, the temperature of heating is generally 200-600 DEG C of left and right, but because hydraulic oil at high temperature can go bad, the bulging hydraulic coupling that may cause multistage high pressure flow formula hydraulic cylinder 6 to be exported is not enough or unstable, cause bulging to carry out, the multistage high pressure flow formula hydraulic cylinder 6 of the present embodiment by being provided for two circulation hydraulic fluid ports of hydraulic oil circulation in rodless cavity 6c, high pressure liquid force feed enters rodless cavity 6c from one of them circulation hydraulic fluid port, and flow out rodless cavity 6c from another circulation hydraulic fluid port, when required hydraulic coupling is provided, make hydraulic oil keep the circulation of given pace, prevent analysis of hydraulic oil overheat.
By the two ends of upper module 1a and lower module 1b are hinged by the piston rod of linkage and thrust hydraulic cylinder 3 and thrust hydraulic cylinder 4 respectively, thrust hydraulic cylinder 3 and thrust hydraulic cylinder 4 can synchronously provide augmented thrust to bulging internal mold 1 opposite to each other, under the effect of linkage, the augmented thrust of augmented thrust hydraulic cylinder is decomposed into to act on upper module 1a and lower module 1b upper and perpendicular to the augmented thrust vertical stress component and the parallel component of augmented thrust that is parallel to axle housing workpiece axial direction of axle housing workpiece axial direction, and under the effect of the bulging hydraulic coupling of multistage high pressure flow formula hydraulic cylinder 6, upper module 1a and lower module 1b separate both sides Shang Xia 5 to axle housing workpiece respectively, extruding axle housing workpiece 5, realize bulging.By bulging external mold 2 is set, can accurately control the position of axle housing workpiece 5 bulging distortion, control axle housing workpiece 5 and start bulging distortion at transition face place, so just can realize the bulging of bridge casing lute bag 5a.
As the above-mentioned technical solutions of this embodiment preferably, logical centre bore during the piston rod that the thrust hydraulic cylinder of quick-detachment syndeton is not set is provided with, and on the cylinder body of this thrust hydraulic cylinder with on the hinge seat 7 being connected with this thrust hydraulic cylinder, be equipped with the through hole coaxial with centre bore, in centre bore and through hole, be provided with the hollow tube 12 for the hydraulic oil pipe between hydraulic fluid port 6f and hydraulic power source and between circulation hydraulic fluid port and hydraulic power source is installed.As depicted in figs. 1 and 2, the centre bore of the present embodiment is arranged on the piston rod of thrust hydraulic cylinder 3, accordingly, the cylinder body of thrust hydraulic cylinder 3 is provided with through hole with the hinge seat 7 being connected with thrust hydraulic cylinder 3, hollow tube 12 extends through centre bore and through hole, and the hydraulic oil pipe between hydraulic fluid port 6f and hydraulic power source is arranged in hollow tube 12.Because the internal diameter of axle housing workpiece 5 is less, occupy behind a large amount of spaces in the structure such as piston rod and linkage of thrust hydraulic cylinder, the arrangement space deficiency of the hydraulic oil pipe between hydraulic fluid port 6f and hydraulic power source, extend through the hollow tube of thrust hydraulic cylinder 3 and hinge seat 7 by setting, can realize hydraulic oil pipe is arranged in hollow tube 12, and provide high pressure liquid force feed for multistage high pressure flow formula hydraulic cylinder 6.
As the above-mentioned technical solutions of this embodiment preferably, between adjacent two-stage hydraulic cylinder body 6b and between high-pressure piston rod 6a and innermost layer hydraulic cylinder body 6b, the top that is positioned at outer field hydraulic cylinder body 6b is provided with the inner baffle ring 6g extending radially inwardly, the bottom that is positioned at the high-pressure piston rod 6a of internal layer is provided with the outer baffle ring 6h extending radially outwardly and coordinate with inner baffle ring 6g, between the periphery wall of inner baffle ring 6g and internal layer hydraulic cylinder body, be provided with hermetically-sealed construction, between outer baffle ring 6h and the internal perisporium of outer hydraulic cylinder body, be provided with hermetically-sealed construction.The multistage high pressure flow formula hydraulic cylinder 6 that adopts this structure, forms position-limit mechanism between inner baffle ring 6g and outer baffle ring 6h, prevents from departing between adjacent two-stage hydraulic cylinder body 6b and innermost layer hydraulic cylinder body 6b and high-pressure piston rod 6a.Preferably, hydraulic fluid port 6f is arranged on inner baffle ring 6g, prevent that multistage high pressure flow formula hydraulic cylinder 6 is in telescopic process, between hydraulic cylinder body 6b and hydraulic fluid port 6f, interfere, the circulation hydraulic fluid port 6i and the circulation hydraulic fluid port 6j that are arranged on described rodless cavity 6c are separately positioned on outermost layer hydraulic cylinder body 6b bottom and high-pressure piston rod 6a, by circulation hydraulic fluid port 6i and circulation hydraulic fluid port 6j are separately positioned on to outermost layer hydraulic cylinder body 6b bottom and high-pressure piston rod 6a, can improve the trafficability performance of hydraulic oil, prevent that in rodless cavity 6c, hydraulic oil local temperature is too high.
The second embodiment
As shown in Figure 5, be the structural representation of the compound inner high voltage flow-type bulging device of automobile drive axle entirety of the present invention the second embodiment after workpiece bulging has been out of shape; Fig. 6 is the structural representation of the overall compound inner high voltage flow-type bulging device of the automobile drive axle of the present embodiment before the distortion of workpiece bulging.
The bulging external mold 2 of the present embodiment comprises external mold 13 and lower external mold 14, upper external mold 13 with on lower external mold 14, be respectively equipped with upper cavity 13a and the lower mode cavity 14a identical with the upper and lower both sides of bridge casing lute bag 5a outer wall shape and structure, supporting mechanism be upper cavity 13a and lower mode cavity 14a respectively the upper cavity corresponding with bridge casing lute bag 5a transition face 5b support inwall 13b and lower mode cavity supports inwall 14b, adopt the bulging external mold 2 of this structure, not only can effectively control the deformed region of axle housing workpiece 5 in Bulging Process, but also can better control the contour structures of the bridge casing lute bag 5a after bulging.Preferably, when upper external mold 13 and lower external mold 14 are closed, upper cavity 13a and the lower mode cavity 14a composition bulging chamber identical with the outer wall shape and structure of bridge casing lute bag 5a, adopt the bulging external mold 2 of this structure, employing will be carried out bulging after upper external mold 13 and lower external mold 14 closures, be convenient to location between external mold 13 and lower external mold 14, be more convenient for applying mold clamping force to bulging external mold 2.
The multistage high pressure flow formula hydraulic cylinder 6 of the present embodiment is set to 1, but those skilled in the art should know, multistage high pressure flow formula hydraulic cylinder 6 also can be arranged side by side according to actual needs as two or more, and its principle is identical with the multistage high pressure flow formula hydraulic cylinder 6 that is set to one or two.
Other structures of the present embodiment are identical with the first embodiment, no longer one by one tired stating.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. the compound inner high voltage flow-type bulging device of automobile drive axle entirety, is characterized in that:
Comprise bulging internal mold, bulging external mold and lay respectively at bulging internal mold two ends and for two thrust hydraulic cylinders of auxiliary mold clamping force are provided;
Described bulging internal mold comprises respectively wraps with bridge casing lute upper module and the lower module that lower both sides inwall coordinates, between described upper module and lower module, be provided with the multistage high pressure flow formula hydraulic cylinder that at least one acts on upper module and lower module and bulging hydraulic coupling is provided, the two ends of described upper module and lower module are articulated and connected by the piston rod of linkage and two thrust hydraulic cylinders respectively;
Described multistage high pressure flow formula hydraulic cylinder comprises high-pressure piston rod and the stacked high pressure liquid cylinder pressure cylinder body that is set in together and is stretching structure of two-stage at least, described high-pressure piston rod is sleeved on the high pressure liquid cylinder pressure cylinder body of innermost layer, between outermost high pressure liquid cylinder pressure cylinder body and high-pressure piston rod, form rodless cavity, between the high pressure liquid cylinder pressure cylinder body of innermost layer and high-pressure piston rod, form rod end chamber, between adjacent two-stage hydraulic cylinder body, form classification oil pocket, described rod end chamber is equipped with on classification oil pocket the hydraulic fluid port being connected with hydraulic power source, described rodless cavity is provided with two circulation hydraulic fluid ports for hydraulic oil circulation,
Described bulging external mold comprises the supporting mechanism for pushing down the transition face between bulging deformed area and the non-deformation zone of bridge casing lute bag;
The piston rod of described two thrust hydraulic cylinders arranges in opposite directions, and the axis of two-piston bar is located on the same line, and the piston rod of one of them thrust hydraulic cylinder is provided with quick-detachment syndeton.
2. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 1, it is characterized in that: between adjacent two-stage hydraulic cylinder body and between high-pressure piston rod and innermost layer hydraulic cylinder body, the top that is positioned at outer field hydraulic cylinder body is provided with the inner baffle ring extending radially inwardly, the bottom that is positioned at the high-pressure piston rod of internal layer is provided with the outer baffle ring extending radially outwardly and coordinate with inner baffle ring, between the periphery wall of described inner baffle ring and internal layer hydraulic cylinder body, be provided with hermetically-sealed construction, between described outer baffle ring and the internal perisporium of outer hydraulic cylinder body, be provided with hermetically-sealed construction.
3. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 2, it is characterized in that: described hydraulic fluid port is arranged on described inner baffle ring, two circulation hydraulic fluid ports that are arranged on described rodless cavity are separately positioned on outermost layer hydraulic cylinder body bottom and high-pressure piston rod.
4. according to the compound inner high voltage flow-type bulging device of automobile drive axle entirety described in claim 1-3 any one, it is characterized in that: described linkage comprises the hinge seat being fixedly mounted on thrust hydraulic cylinder piston rod, between described hinge seat and described upper module and lower module, be articulated and connected by two hinge bars respectively.
5. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 1, it is characterized in that: logical centre bore during the piston rod that the thrust hydraulic cylinder of quick-detachment syndeton is not set is provided with, and on the cylinder body of this thrust hydraulic cylinder with on the hinge seat being connected with this thrust hydraulic cylinder, be equipped with the through hole coaxial with centre bore, in described centre bore and through hole, be provided with the hollow tube for the hydraulic oil pipe between described hydraulic fluid port and hydraulic power source and between circulation hydraulic fluid port and hydraulic power source is installed.
6. according to the compound inner high voltage flow-type bulging device of automobile drive axle entirety described in claim 1-3 any one; it is characterized in that: described bulging external mold also comprises support; described supporting mechanism comprises rack-mount support bar and be arranged on the supporting member on support bar, and described supporting member is pressed on described transition face.
7. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 6, is characterized in that: described supporting member is the curved surface coordinating with described transition face with the contact-making surface of axle housing workpiece.
8. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 7, is characterized in that: described supporting member is set to 4, and lays respectively at the both sides up and down of the two ends transition face of described bridge casing lute bag.
9. according to the compound inner high voltage flow-type bulging device of automobile drive axle entirety described in claim 1-3 any one, it is characterized in that: described bulging external mold comprises external mold and lower external mold, described upper external mold wraps with being respectively equipped with on lower external mold with described bridge casing lute upper cavity and the lower mode cavity that lower both sides outer wall shape and structure is identical, described supporting mechanism be described upper cavity and lower mode cavity respectively the upper cavity corresponding with bridge casing lute bag transition face support inwall and lower mode cavity supports inwall.
10. the compound inner high voltage flow-type bulging device of automobile drive axle entirety according to claim 9, it is characterized in that: when described upper external mold and lower external mold are closed, described upper cavity and the lower mode cavity composition bulging chamber identical with the outer wall shape and structure of bridge casing lute bag.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210357526.6A CN102886466B (en) | 2012-09-24 | 2012-09-24 | Overall composite inner high-pressure flow type bulging device for car drive axle |
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| CN201210357526.6A CN102886466B (en) | 2012-09-24 | 2012-09-24 | Overall composite inner high-pressure flow type bulging device for car drive axle |
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| CN102886466B true CN102886466B (en) | 2014-11-26 |
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| CN103317052A (en) * | 2013-06-06 | 2013-09-25 | 重庆科技学院 | Integrated composite external-driving type bulging device for vehicle drive axle |
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| JP2003311343A (en) * | 2002-04-24 | 2003-11-05 | Jfe Steel Kk | Hydroform forming method and device |
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