CN104096742B - Keep the hydro piercing method and device of workpiece wall flatness - Google Patents
Keep the hydro piercing method and device of workpiece wall flatness Download PDFInfo
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- CN104096742B CN104096742B CN201310129574.4A CN201310129574A CN104096742B CN 104096742 B CN104096742 B CN 104096742B CN 201310129574 A CN201310129574 A CN 201310129574A CN 104096742 B CN104096742 B CN 104096742B
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Abstract
The present invention is a kind of hydro piercing method and device keeping workpiece wall flatness, and this hydro piercing device is arranged in the stairstepping inner chamber of upper die body, and stairstepping inner chamber includes first to fourth sub-inner chamber, and upper die body matches with lower mold body and forms the die cavity of clamping workpiece；Hydro piercing device includes: be arranged on the drift body in the first and second sub-inner chambers, the transverse elasticity slide assemblies being arranged in the 3rd sub-inner chamber and the piston mandril assembly being arranged in the 4th sub-inner chamber and drift body；Piston mandril assembly is positioned by transverse elasticity slide assemblies elastic restraint；Drift body shifts up when raising up under workpiece action of hydraulic force therein；Piston mandril assembly promotes drift body to bottom offset to remove protruding and to form punching when piston is by downward driving force.The present invention utilizes a punching stroke, makes jumper bar first move upward and moves to realize punching still further below, thus avoids aperture to subside, preserves the flatness of tube wall and precision improve hydro piercing efficiency.
Description
Technical field
The present invention relates to a kind of workpiece hydraulic forming method and device, specifically relevant a kind of workpiece hydroforming
Hydro piercing method and device.
Background technology
At aircraft, spacecraft and automotive field, it is modern for alleviating weight to save material and operating energy
One of trend of Manufacturing Technology Development.A kind of manufacture that hydroforming develops the most in this context
The advanced manufacturing technology of hollow light body structural member, this technology both can improve the strength and stiffness of drip molding, again might be used
Save material, reduce cost.The basic craft course of this technology is as seen in figure la and lb: as shown in Figure 1a,
First tubing 3 is placed in lower mold 2, then Guan Bi upper mold 1, the two ends of tubing 3 horizontal punch 4,4 is sealed,
And it is hydraulically full in making tubing 3；Then, as shown in Figure 1 b, during hydraulic pressurization makes tubing 3 bulging,
The drift 4,4 making two ends inwardly advances feed supplement simultaneously, so makes under the synergy of interior pressure and axial force
Tubing 3 reclines mould 1,2 and is configured to required workpiece 3.
Often need to process several to dozens of hole, including for different purposes on hydroforming workpiece or part
Pilot hole, location hole, electrophoretic coating hole etc., due to the tubular element enclosed cross of hydroforming, along axle
The cross section of line complex-shaped, often cannot insert rigid matrix at component inside, therefore as used common punching
Hole method, by punching direct outside pipe fitting, will cause large range of deeper collapsing around the outer pit aperture of pipe fitting
Falling into, product rigidity and service life can be adversely affected by this.Therefore, drilling on hydroformed part
Many employing hydro piercing methods, as shown in figures 2 a and 2b, wherein Fig. 2 a is to use existing hydraulic pressure to punch process
Punching technology, workpiece shaped by hydro piercing before schematic diagram；Fig. 2 b is to use existing hydro piercing technique,
Workpiece schematic diagram after hydro piercing.As shown in Figure 2 a, after hydroforming, keep the internal liquid of workpiece 3
Pressure P is constant for body, and using highly pressurised liquid as supporting die, multiple drifts 5 ' (only showing 1 in figure) wear
On mould 1,2；Then, as shown in Figure 2 b, drive multiple drift 5 ' to be punched out by outside workpiece 3 simultaneously,
To synchronize to go out multiple hole.Hydro piercing not only can improve production efficiency, but also can meet positional precision and zero between hole
Part surface smoothness requirement, so that it is guaranteed that the rigidity of part and service life.
But this existing hydro piercing technique Shortcomings: hydro piercing typically uses the punching of ecto-entad
Mode, using highly pressurised liquid as female mold support, to effectively prevent from subsiding, then interior pressure P requires sufficiently high.
But, the rising of interior pressure P can cause the power of drift 5 ' also can raise accordingly, and interior pressure P can make punching time too high
Head power is not enough and causes smoothly completing punching, or causes drift fracture failure；When interior pressure P is relatively low
Or rushed porous close together time, then can cause being formed around aperture certain angle of collapsing, to workpiece 6 surface matter
Amount produces impact, as shown in Figure 3.
When Hydroforming designs the punch mechanism in hydroforming process at present, mainly from punching merit
The angle that can realize removes to carry out Design of Dies, mainly processes some functional holes, and there is no technical measures and come really
The flatness of tube wall is kept, to improve precision and the surface quality of workpieces of final hole in piece part after protecting hydro piercing.
" invention entitled there is in mould piercing capability and use the scrap metal of hydro-forming fluid to discharge
Hydroforming equipment (the HYDROFORMING APPARATUS HAVING IN-DIE HOLE PIERCING of system
CAPABLITIES AND A SLUG EJECTION SYSTEM USING HYDROFORMING FLUID) "
U.S. Patent Application No. 5816089 discloses a kind of punching from inside to outside and the place of the produced waste material of punching
Reason method and apparatus, mainly for the treatment of producing waste material, how waste material in " from inside to outside " punch process
Mould is cleaned out from die punching passage.The most do not disclose how to improve the technology hands of the quality of shaped hole
Section.
At invention entitled " multiple punching hydroforming instrument (MULTI-PIECE HYDROFORMING TOOL) "
U.S. Patent Application No. 6006568 in disclose one set of die in process the method in multiple hole simultaneously, logical
Crossing to install and install a drift on multiple hydraulic cylinder, each hydraulic cylinder and be practiced, it is disclosed that a kind of liquid
Pressure hole-punching method and device, be also not directed to how to improve any technical measures of punching quality.
Summary of the invention
It is an object of the invention to provide a kind of hydro piercing method and device, can be in the feelings that need not high internal pressure power
Realize the flatness of the punching peritreme of hydroforming part under condition, prevent the generation subsided.
A kind of hydro piercing device keeping workpiece wall flatness, described hydraulic pressure are provided according to an aspect of the present invention
Hole punched device is arranged in the stairstepping inner chamber of upper die body, and stairstepping inner chamber includes the of coaxial line from bottom to top
One to the 4th sub-inner chamber, upper die body matches with lower mold body and forms the die cavity of clamping workpiece；Described hydro piercing
Device includes: be successively set on the most vertically the drift body in described first and second sub-inner chambers,
The transverse elasticity slide assemblies being arranged in the 3rd sub-inner chamber and be arranged in described 4th sub-inner chamber and described punching
Piston mandril assembly in head body；Wherein, described piston mandril assembly is by described transverse elasticity slide assemblies
Elastic restraint positions；When described drift body raises up under workpiece action of hydraulic force therein upwards
Displacement；Piston mandril assembly promotes drift body to bottom offset to remove when piston is by downward driving force
Described projection also forms punching.
Described transverse elasticity slide assemblies includes: the wedge shape being arranged in the 3rd sub-inner chamber of described upper die body is sliding
Block and the spring abutted with wedge block lateral surface, the upper and lower end face of described wedge block is respectively formed with
One inclined-plane and the second inclined-plane.
Described piston mandril assembly includes: the piston of upper end and the push rod body being connected with piston, piston is set
Putting in punching cylinder, described push rod body is formed with the 3rd inclined-plane of the first contact of incline plane with wedge block,
Push rod body lower end is formed with flange.
Described its upper surface of drift body is formed with the 4th inclined-plane of the second contact of incline plane with wedge block, from
Upper surface central authorities extend axially downward and are formed with stairstepping inner chamber, in described stairstepping inner chamber includes the 5th son
Chamber and the 6th sub-inner chamber, the diameter of the 5th sub-inner chamber is more than the diameter of the 6th sub-inner chamber；The lower end of drift body
Forming jumper bar, described jumper bar matches with described first sub-inner chamber, and the lower surface of jumper bar is horizontal plane, described
The flange of push rod body is contained in described 5th sub-inner chamber；Drift body is retrained by transverse elasticity slide assemblies
During location, the lower end of the jumper bar of drift body is concordant with the lower end of the first of upper die body the sub-inner chamber, push rod body
The 5th sub-inner chamber bottom surface of bottom surface and drift body of lower flange form initial distance.
Wherein, spring is designed to it by compression travel and makes in the middle of push rod body wedge block after sliping off
Pass.
Wherein, the rigidity of spring is sufficient so that push rod body when passing in the middle of the wedge block 7, wedge block
Inner side keep with contacting of push rod body and do not produce gap.
Wherein, inside workpiece keeps fluid pressure in punch process.
Wherein, the angle on the 4th inclined-plane of drift body upper part and the second inclined-plane of wedge block bottom is equal,
Preferably 3 °～5 °.
Wherein, the 3rd inclined-plane of push rod body lower part is equal with the angle on first inclined-plane on wedge block top,
Preferably 60 °～80 °.
There is provided a kind of hydro piercing method keeping workpiece wall flatness according to a further aspect of the invention, in employing
Stating hydro piercing device to implement, described hydro piercing device is arranged in the stairstepping inner chamber of upper die body, ladder
Shape inner chamber includes first to fourth sub-inner chamber of coaxial line from bottom to top, and upper die body matches with lower mold body formation
The die cavity of clamping workpiece；Described hydro piercing device includes: be axially successively set on described first and second
Drift body, the transverse elasticity slide assemblies being arranged in the 3rd sub-inner chamber in sub-inner chamber and be arranged in described
Piston mandril assembly in 4th sub-inner chamber and described drift body, described piston mandril assembly include piston and
The push rod body being connected with piston；Described method includes:
Put the workpiece in the die cavity between upper die body and lower mold body；
Make drift body by transverse elasticity slide assemblies constraint location, make the lower end of jumper bar of drift body with upper
The lower end of the first sub-inner chamber of die body is concordant, the bottom surface of the lower flange of push rod body and the 5th of drift body the
Sub-inner chamber bottom surface forms initial distance；
In workpiece, inject highly pressurised liquid, make the workpiece contact portion with the first sub-inner chamber of upper die body at liquid
Under the effect of pressure upwardly-deformed, gradually form the projection of workpiece along the first sub-inner chamber, and jumper bar upwards pushed up
Play first distance；Jumper bar moves upward together with drift body so that with the 4th inclined-plane of drift body
Promote the second inclined-plane of being in contact with it to make wedge block to the direction sliding away from push rod body, and make horizontal bullet
Property slide assemblies spring produce compression；Simultaneously as the sliping off laterally of wedge block, push rod this
Body is under gravity along the first inclined-plane and one second distance of the 3rd inclined-plane slide downward；
In the case of inside workpiece keeps fluid pressure, make piston sharp downward movement, promote push rod body
Move downward, the 3rd slope driving of push rod body the wedge block contacted by the first inclined-plane is to far
Move from the direction of push rod body so that push rod body lower end and the upper-end contact of drift body；Piston is made to continue
Continuous downward rapid movement, promotes push rod body and the jumper bar also sharp downward movement of drift body, rushing of jumper bar
Power makes the projection of workpiece separate with workpiece shearing, to realize by the punching in workpiece extroversion workpiece.
Wherein, initial distance is more than the first distance and second distance sum.
The invention has the beneficial effects as follows, a punching stroke of available punching cylinder, the piston in punching cylinder
The direction of motion constant in the case of, the jumper bar i.e. drift of punching can be made first to move upward, move still further below,
Complete the technical process of first bulging punching again, enormously simplify to the direction of motion of piston movement in punching cylinder,
Moving displacement and the isoparametric control of stop position, can improve hydro piercing efficiency, reduce control system system
Cause this and control difficulty；And, punching rupture required for the direct ecto-entad punching of punching force rate
Little, thus the aperture during reduction even elimination ecto-entad hydro piercing subsides, reaches to improve tube wall
Flatness and precision, reduction hydro piercing cylinder required thrust, raising hydro piercing efficiency.
Accompanying drawing explanation
Fig. 1 a is to use existing Hydroform process, the schematic diagram before workpiece unshaped；
Fig. 1 b is to use existing Hydroform process, the schematic diagram after component shaping；
Fig. 2 a is to use existing hydro piercing technique, workpiece schematic diagram before hydro piercing shapes；
Fig. 2 b is to use existing hydro piercing technique, workpiece schematic diagram after hydro piercing shapes；
Fig. 3 is to use workpiece interface after existing punching technology punching to subside schematic diagram；
Fig. 4 a to Fig. 4 c is the hydro piercing method and device first swollen backlash process of one embodiment of the invention
Schematic diagram；Schematic diagram before wherein Fig. 4 a is piercing and shaping die；Fig. 4 b is the signal forming lobe before non-punching
Figure；Fig. 4 c is the schematic diagram realizing punching；
Fig. 5 is the schematic diagram that the hydro piercing device of one embodiment of the invention is in initial first state；
Fig. 6 is that the hydro piercing device of one embodiment of the invention is in the second state after forming a projection
Schematic diagram；
Fig. 7 is the signal that the hydro piercing device of one embodiment of the invention is in the third state that punching completes
Figure.
Wherein:
5-drift body, the inclined-plane, inclined-plane, upper end that is the 4th of 501-drift body 5,502-jumper bar, 503-rushes
The sub-inner chamber of inner chamber that is the 5th of head body 5, the sub-inner chamber of inner chamber that is the 6th of 504-drift body 5；7-wedge shape
Slide block, that is second inclined-plane, inclined-plane, lower end of 701-wedge block, the upper lateral part inclined-plane of 702-wedge block 7 is i.e.
First inclined-plane；8-piston；9-push rod body, lower bevel that is the 3rd inclined-plane of 901-push rod body, 902-
Flange；903-push rod；10-spring；The upper mould body of 1-, 101,102,103, the upper mould body of 104-1
Hollow cavity, i.e. first to fourth sub-inner chamber；6-workpiece or pipe fitting, the projection on 601-workpiece or pipe fitting；
Mould body under 2-；During L1-the first state, lower flange 902 bottom surface of push rod body 9 is interior with drift body 5
The distance of the sub-inner chamber bottom surface of chamber 503 that is the 5th；During L2-the second state, the jumper bar 502 of drift body 5 is upwards transported
Dynamic distance；During L3-the second state, the distance of push rod body 9 slide downward.
Detailed description of the invention
For the above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing to this
Bright detailed description of the invention elaborates.Firstly the need of explanation, the present invention be not limited to following specifically
Embodiment, those skilled in the art should be from the spirit that following embodiment is embodied to understand this
Bright, each technical term spirit based on the present invention can make broadest understanding.Identical or phase in figure
As component use the same reference numerals to represent.
The present invention provides a kind of hydro piercing device and hydro piercing method, can be in hydro piercing cylinder a work
Making, in stroke, to make workpiece, pipe fitting 6 the most in the present embodiment needs the part of punching first to send out before punching
Raw bulging, obtains certain dependent variable at the mould aperture of the upper mold 1 of drift 5 position, is prefabricated into one
Individual protruding features 601 outside pipe fitting, the maximum strain at protruding features 601 is close to strain during Materials Fracture
But keep not rupturing, be punched drift 5 the most again and pour pipe fitting 6, complete hydro piercing.Above-mentioned work
Make principle as shown in Fig. 4 a to Fig. 4 c.
Fig. 5 to Fig. 7 be respectively the hydro piercing device of one embodiment of the invention be in initial first state,
Two-state and the schematic diagram of the third state.As it can be seen, the holding workpiece wall of one embodiment of the invention is smooth
Degree hydro piercing device, be arranged in the stairstepping inner chamber of upper die body 1, stairstepping inner chamber include by lower to
First to fourth sub-inner chamber 101～104 of upper coaxial line, upper die body 1 matches with lower mold body 2 and forms clamping work
The die cavity of part 6.The hydro piercing device of this embodiment includes: be successively set on described the most vertically
Drift body 5 in first sub-inner chamber 101 and the second sub-inner chamber 102, the horizontal stroke being arranged in the 3rd sub-inner chamber 103
To Elastic Sliding assembly 12 and the piston top being arranged in described 4th sub-inner chamber 104 and described drift body 5
Bar assembly 13.Drift body 5, transverse elasticity slide assemblies 12 and work in detailed description below the present embodiment
The concrete structure of plug push rod component 13.
As it is shown in figure 5, described transverse elasticity slide assemblies 12 includes: be arranged in the 3rd son of described upper die body 1
Wedge block 7 in inner chamber 103 and the spring 10 abutted with wedge block 7 lateral surface, described wedge block 7
Upper and lower end face is respectively formed with the first inclined-plane 702 and the second inclined-plane 701.
Described piston mandril assembly 13 includes: the piston 8 of upper end and the top being connected with piston 8 by piston rod 8 '
Bar body 9, piston 8 is arranged in punching cylinder 11, and described push rod body 9 is formed with wedge block 7
3rd inclined-plane 901 of one inclined-plane 702 contact, push rod body lower end is extended with push rod 903, the lower end of push rod 903
It is formed with flange 902.Flange 902 stretches in the 5th sub-inner chamber 503 of drift body 5, is connected with flange 902
The diameter of push rod 903 of push rod body 9 be less than flange 902 and the diameter of push rod body 9, push rod 903 is worn
Cross the 6th sub-inner chamber 504 of drift body 5.
It is the 4th oblique that described its upper surface of drift body 5 is formed with that the second inclined-plane 701 with wedge block 7 contacts
Face 501, extends axially downward from described upper surface central authorities and is formed with stairstepping inner chamber, in described stairstepping
Chamber includes the 5th sub-inner chamber 503 and the 6th sub-inner chamber 504, and the diameter of the 5th sub-inner chamber 503 is more than in the 6th son
The diameter in chamber 504；The lower end of drift body 5 forms jumper bar 502, described jumper bar 502 and described first sub-inner chamber
101 match, and the lower surface of jumper bar 502 is horizontal plane, and the flange 902 of described push rod body 9 is contained in described
In 5th sub-inner chamber 503.When drift body 5 is retrained location by transverse elasticity slide assemblies 12, drift body 5
The lower end of lower end inner chamber 101 sub-with the first of upper die body 1 of jumper bar 502 is concordant, the bottom method of push rod body 9
The bottom surface of blue 902 forms initial distance L1, such as Fig. 5 institute with the bottom surface of the 5th sub-inner chamber 503 of drift body 5
Show.
In the present invention, the hydroforming part i.e. material of workpiece 6 is mild steel tubing, aluminium alloy pipe, no
Rust steel tubing or high-strength steel tubing.
In the present invention, drift body 5 upper inclined surface, the i.e. the 4th inclined-plane 501 and wedge block 7 lower bevel,
The angle on the i.e. second inclined-plane 701 is equal, is preferably 3 °～5 °, to guarantee that wedge block 7 can realize self-locking,
The thrust that will not be produced by the hydroforming part 6 internal liquid pressure suffered by drift body 5 is pushed open, thus
Realize the position constraint to drift body 5.
In the present invention, push rod body 9 lower bevel, the i.e. the 3rd 901 and wedge block 7 upper inclined surface, i.e.
The angle on the first inclined-plane 702 is equal, preferably 60 °～80 °, to guarantee that wedge block 7 can be by push rod body 9
To both sides promote, between wedge block 7 and drift body 5, produce certain gap, make drift body 5 to
The displacement of upper motion reaches setting value, to meet pipe fitting i.e. workpiece 6 punching position generation bulging, to form projection
The needs of 601.
Wherein, the compression travel of spring 10 is designed to it and makes the push rod body 9 can be sliding from the wedge shape after sliping off
Pass in the middle of block 7；The rigidity of spring 10 is sufficient so that push rod body 9 when passing in the middle of the wedge block 7, wedge
The inner side of shape slide block 7 keeps contacting with push rod body 5 and not producing gap.
Hereinafter will be explained in detail the work using the hydro piercing device of the present invention to implement hydro piercing manufacturing process
Skill process.
As shown in Figures 5 to 7, the hydro piercing manufacturing process of one embodiment of the invention comprises the following steps:
The pipe fitting 6 of workpiece, such as the present embodiment is put in the die cavity between upper die body 1 and lower mold body 2；
Make drift body be retrained location by transverse elasticity slide assemblies 12, in the present embodiment, make drift body
5 are passed through the restrained location of spring 10, jumper bar 502 lower end of drift body 5 and upper mould body 1 by wedge block 7
Hollow cavity that is first sub-inner chamber 101 lower end concordant, make the bottom of push rod body 9 in piston mandril assembly 13
The bottom surface of flange 902 forms initial distance L1, as shown in Figure 5 with the 5th sub-inner chamber 503 bottom surface of drift body 5
The first state；
In workpiece 6, inject highly pressurised liquid, make the contact portion of workpiece 6 and the first sub-inner chamber 101 of upper die body 1
Under the effect of fluid pressure upwardly-deformed, gradually form the projection 601 of workpiece along the first sub-inner chamber, and will
Jumper bar 502 upwards one the first distance L2 of jack-up；Meanwhile, jumper bar 502 moves upward together with drift body 5,
The 4th inclined-plane 501 with drift body 5 is made to promote the second inclined-plane 701 being in contact with it, so that wedge block 7
To the direction sliding away from push rod body 9, and the spring 10 of transverse elasticity slide assemblies 12 is made to produce compression change
Shape；While the sliping off laterally of wedge block, push rod body 5 is under gravity along the first inclined-plane 702
With the 3rd one second distance L3 of inclined-plane 901 slide downward, the second state as shown in Figure 6.Now, protruding
The raw-material limiting strain that the maximum distortion of 601 should be used close to pipe fitting 6, but do not produce and rupture；
In the case of keeping fluid pressure inside workpiece 6, make piston 8 sharp downward movement, promote push rod originally
Body 5 moves downward, the 3rd inclined-plane 901 of push rod body 5 be forced through the wedge that the first inclined-plane 702 contacts
Shape slide block 7 moves to the direction away from push rod body 9 so that push rod body 9 lower end and the upper end of drift body 5
Contact；Making piston 8 continue downward rapid movement, the jumper bar 502 promoting push rod body 9 and drift body 5 is the fastest
Speed moves downward, and the impulse force of jumper bar 502 makes the projection 601 of workpiece 6 shear with workpiece 6 to separate, with realize by
Punching in workpiece extroversion workpiece, the third state as shown in Figure 7.
Wherein:
L1≥L2+L3；
The compression travel of spring 10 is wanted enough so that push rod body 9 can be from the wedge block 7 after sliping off
Between pass；
The rigidity of spring 10 is wanted enough so that when push rod body 9 passes in the middle of wedge block 7, wedge block
The inner side of 7 keep with contacting of push rod body 9 and do not produce gap；
Pipe fitting 6 inside to keep certain fluid pressure P1 in punch process.
Using methods and apparatus of the present invention, the material of described hydroforming part 6 is mild steel tubing, aluminum conjunction
Gold tubing, stainless steel pipe or high-strength steel tubing.
The angle of drift body 5 upper inclined surface 501 and wedge block 7 lower bevel 701 is equal, specifically for 3 °
～5 °, it is ensured that wedge block 7 can realize self-locking, will not be by the hydroforming part suffered by drift body 5
The thrust that portion's fluid pressure produces is pushed open, it is achieved the position constraint to drift body 5.
Push rod body 9 lower bevel 901 is equal with the angle of wedge block 7 upper inclined surface 702, specifically for 60 °
～80 °, it is ensured that wedge block 7 can be promoted to both sides by push rod body 9, at wedge block 7 and drift body 5
Between produce certain gap, the displacement making drift body 5 move upward reaches setting value, meets pipe fitting 6 and rushes
There is bulging, form the needs of projection 601 in position, hole.
In sum, a punching stroke of available punching cylinder 11, the motion of the piston 8 in punching cylinder
In the case of direction is constant, the jumper bar i.e. drift 502 of punching can be made first to move upward, move still further below,
Complete the technical process of first bulging punching again, enormously simplify the motion side of piston movement in punching cylinder 11
To, moving displacement and the isoparametric control of stop position, hydro piercing efficiency can be improved, reduce and control system
System manufacturing cost and control difficulty；And, punching rupture required for the direct ecto-entad of punching force rate
Punching is little, thus the aperture during reduction even elimination ecto-entad hydro piercing subsides, reaches to improve pipe
The flatness of wall and precision, reduction hydro piercing cylinder required thrust, raising hydro piercing efficiency.
Therefore, the hole-punching method of the present invention and device thereof can be substantially reduced punching apparatus requirement, save mould
Cost, and efficiency is higher.It addition, the hydro piercing device of the present invention is applied equally to be arranged on lower mold
In body, principle is identical, repeats no more.
Should be understood that after the above-mentioned teachings having read the present invention, those skilled in the art can be to this
Invention makes various changes or modifications, and these equivalent form of values fall within the application appended claims equally and limited
Scope.
Claims (10)
1. keep a hydro piercing device for workpiece wall flatness, described hydro piercing device to be arranged on upper mold
In the stairstepping inner chamber of body, stairstepping inner chamber includes first to fourth sub-inner chamber of coaxial line from bottom to top, on
Die body matches with lower mold body and forms the die cavity of clamping workpiece；It is characterized in that, described hydro piercing device bag
Include: be successively set on the drift body in described first and second sub-inner chambers the most vertically, be arranged on
Transverse elasticity slide assemblies in 3rd sub-inner chamber and be arranged in described 4th sub-inner chamber and described drift body
In piston mandril assembly；Wherein, described piston mandril assembly is by described transverse elasticity slide assemblies elasticity about
Shu Dingwei；Described drift body shifts up when raising up under workpiece action of hydraulic force therein；
Piston mandril assembly promotes drift body described to remove to bottom offset when piston is by downward driving force
Projection also forms punching.
The hydro piercing device of holding workpiece wall flatness the most according to claim 1, it is characterised in that
Described transverse elasticity slide assemblies includes: the wedge block being arranged in the 3rd sub-inner chamber of described upper die body and
The spring abutted with wedge block lateral surface, it is oblique that the upper and lower end face of described wedge block is respectively formed with first
Face and the second inclined-plane.
The hydro piercing device of holding workpiece wall flatness the most according to claim 2, it is characterised in that
Described piston mandril assembly includes: the piston of upper end and the push rod body being connected with piston, piston is arranged on
In punching cylinder, described push rod body is formed with the 3rd inclined-plane of the first contact of incline plane with wedge block, push rod
Body lower end is formed with flange.
The hydro piercing device of holding workpiece wall flatness the most according to claim 3, it is characterised in that
Described its upper surface of drift body is formed with the 4th inclined-plane of the second contact of incline plane with wedge block, from upper end
Face central authorities extend axially downward and are formed with stairstepping inner chamber, described stairstepping inner chamber include the 5th sub-inner chamber and
Being communicated in the 6th sub-inner chamber above the 5th sub-inner chamber, the diameter of the 5th sub-inner chamber is more than the 6th sub-inner chamber
Diameter；The lower end of drift body forms jumper bar, and described jumper bar matches with described first sub-inner chamber, jumper bar
Lower surface is horizontal plane, and the flange of described push rod body is contained in described 5th sub-inner chamber；Drift body by
During transverse elasticity slide assemblies constraint location, the lower end of the jumper bar of drift body and the first of upper die body the sub-inner chamber
At the beginning of lower end is concordant, the bottom surface of lower flange of push rod body formed with the 5th sub-inner chamber bottom surface of drift body
Beginning distance.
The hydro piercing device of holding workpiece wall flatness the most according to claim 4, it is characterised in that
The angle on the 4th inclined-plane of drift body upper part and the second inclined-plane of wedge block bottom is equal, the angle ranging from
3 °～5 °.
6. according to the hydro piercing device of the holding workpiece wall flatness described in claim 3 or 4, its feature
Being, the 3rd inclined-plane of push rod body lower part is equal with the angle on first inclined-plane on wedge block top, described
Angle is 60 °～80 °.
7. according to the hydro piercing device of the holding workpiece wall flatness described in any one of claim 1 to 5,
It is characterized in that, inside workpiece keeps fluid pressure in punch process.
The hydro piercing device of holding workpiece wall flatness the most according to claim 6, it is characterised in that
Inside workpiece keeps fluid pressure in punch process.
9. keep a hydro piercing method for workpiece wall flatness, use any one of claim 4 to 5
Described hydro piercing device is implemented, and described hydro piercing device is arranged in the stairstepping inner chamber of upper die body,
Stairstepping inner chamber includes first to fourth sub-inner chamber of coaxial line from bottom to top, and upper die body matches with lower mold body
Form the die cavity of clamping workpiece；It is characterized in that, described hydro piercing device includes: axially setting gradually
Drift body in described first and second sub-inner chambers, the transverse elasticity being arranged in the 3rd sub-inner chamber are slided
Assembly and the piston mandril assembly being arranged in described 4th sub-inner chamber and described drift body, described piston top
Bar assembly includes piston and the push rod body being connected with piston；Described method includes:
Put the workpiece in the die cavity between upper die body and lower mold body；
Make drift body by transverse elasticity slide assemblies constraint location, make the lower end of jumper bar of drift body with upper
The lower end of the first sub-inner chamber of die body is concordant, the bottom surface of the lower flange of push rod body and the 5th of drift body the
Sub-inner chamber bottom surface forms initial distance；
In workpiece, inject highly pressurised liquid, make the workpiece contact portion with the first sub-inner chamber of upper die body at liquid
Under pressure effect upwardly-deformed, gradually form the projection of workpiece along the first sub-inner chamber, and by jumper bar upwards jack-up
One the first distance；Jumper bar moves upward together with drift body so that with the 4th slope driving of drift body
The second inclined-plane being in contact with it makes wedge block to the direction sliding away from push rod body, and makes transverse elasticity sliding
The spring of dynamic assembly produces compression；Simultaneously as the sliping off laterally of wedge block, push rod body exists
Along the first inclined-plane and one second distance of the 3rd inclined-plane slide downward under action of gravity；
In the case of inside workpiece keeps fluid pressure, make piston sharp downward movement, promote push rod body
Move downward, the 3rd slope driving of push rod body the wedge block contacted by the first inclined-plane is to far
Move from the direction of push rod body so that push rod body lower end and the upper-end contact of drift body；Piston is made to continue
Continuous downward rapid movement, promotes push rod body and the jumper bar also sharp downward movement of drift body, rushing of jumper bar
Power makes the projection of workpiece separate with workpiece shearing, to realize by the punching in workpiece extroversion workpiece.
The hydro piercing method of holding workpiece wall flatness the most according to claim 9, its feature exists
In, described initial distance is more than described first distance and described second distance sum.
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| CN106270100B (en) * | 2015-06-23 | 2018-09-04 | 宝山钢铁股份有限公司 | Hydro piercing method for flanging and sectional type punching flanging device |
| CN105563532A (en) * | 2016-01-29 | 2016-05-11 | 郑建平 | Material cutting device |
| CN105619478A (en) * | 2016-01-29 | 2016-06-01 | 郑建平 | Intelligently controlled material cutting machine |
| CN107552634A (en) * | 2016-06-30 | 2018-01-09 | 比亚迪股份有限公司 | A kind of hydro piercing device and hydro piercing technique |
| CN106270129A (en) * | 2016-08-29 | 2017-01-04 | 天津市天锻压力机有限公司 | A kind of novel holing method based on internal high pressure forming |
| CN110883220A (en) * | 2019-11-12 | 2020-03-17 | 河南星光机械制造有限公司 | Cold extrusion die and machining method of small-collapse-angle fine-blanking part |
| CN112170610B (en) * | 2020-09-15 | 2021-12-14 | 安徽江淮汽车集团股份有限公司 | Liquid-filling forming die and liquid-filling forming method |
| CN112692150A (en) * | 2020-12-11 | 2021-04-23 | 星火智慧(杭州)信息科技有限公司 | Divide water collector internal expanding machine |
| CN114309229B (en) * | 2021-12-27 | 2022-12-02 | 中国科学院金属研究所 | Forming-punching-flanging integrated impact hydraulic forming die and method |
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