CN107274776B - A kind of Modular high-speed cutting experiment platform based on Hopkinson pressure bar device - Google Patents
A kind of Modular high-speed cutting experiment platform based on Hopkinson pressure bar device Download PDFInfo
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- CN107274776B CN107274776B CN201710426024.7A CN201710426024A CN107274776B CN 107274776 B CN107274776 B CN 107274776B CN 201710426024 A CN201710426024 A CN 201710426024A CN 107274776 B CN107274776 B CN 107274776B
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Abstract
The invention discloses a kind of Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, including pedestal and high-speed camera；Pedestal bottom plate is equipped with mounting hole；The side of pedestal vertical plate is fixed with cutter frame mechanism, is equipped with workpiece motion s direction control mechanism on pedestal bottom plate, positioned at the ipsilateral of cutter frame mechanism；Cutter frame mechanism includes the knife bar gland for being fixed on pedestal vertical plate side, and knife bar is fixed on pedestal vertical plate by fastening bolt, and blade is installed in the front end of knife bar；Workpiece motion s direction control mechanism includes bearing block, and the top of bearing block is equipped with the axially open penetrated through with axis hole, is equipped with the workpiece installation axle for being fixed with workpiece by linear bearing in axis hole, the top surface of bearing block is axially arranged with graduation mark along axis hole；Pedestal vertical plate is equipped with through-hole.Experiment porch structure of the present invention is simple, can cooperate the convenient and efficient completion high-speed cutting experiment of Hopkinson pressure bar test machine and the quick roll setting experiment of high-speed cutting, not need the experimental provision of special designing.
Description
Technical field
The invention belongs to metal cutting field, especially a kind of high-speed cutting for Hopkinson pressure bar device technique is real
Test platform.
Background technique
High-speed Machining Technology is the advanced manufacturing technology to emerge rapidly in recent ten years, represents modern processing
Main flow direction.High Speed Cutting Technique is with high in machining efficiency, cutting force is small, chip takes away big calorimetric and has little time to be transmitted to work
The features such as part keeps workpiece thermal deformation small.High cutting speed and high feed speed make the excited frequency of lathe much higher than " lathe-work
The intrinsic frequency of part-cutter " system, workpiece are in steady machining state, and part is made to obtain higher machining accuracy.So high speed
Machining it is increasingly extensive be applied to mold, aerospace and auto industry etc., and to achieve huge economic benefit.It is high
Fast cutting scheme is the basis of High-speed Machining Technology development, however still not about many phenomenon people in high-speed machining process
Know essential reason, high speed machining mechanism is also not it is clear that this seriously constrains the development and application of High-speed Machining Technology.It is right
It is very important cutting parameter in high-speed cutting processing cutting speed, cutting speed measurement directly influences cutting whether accurate
The confidence level of mechanism.Chip simulation pattern is the important research foundation for studying metal cutting plastic flow deformation, and quick roll setting is real
Proved recipe method is that research chip simulation is instantaneously plastically deformed and the important method of cutting scheme.It can be in the feelings for not changing cutting speed
Making tool-chip quick separating under condition is the key that research chip simulation situation；Experiment based on Hopkinson pressure bar loading technique
Device is usually used in studying high speed machining mechanism, but can not accomplish to need any replacement cutter according to research.It needs in summary
It is a kind of it is accurate measurement cutting speed and can be achieved as needed quick roll setting function, can be achieved tool geometrical parameter variation
High-speed cutting experiment.
The high-speed cutting experimental provision of Hopkinson pressure bar loading technique is difficult accurately to obtain the phase of cutter and workpiece at present
To speed, the existing high-speed cutting experiment based on Hopkinson pressure bar loading technique is that measurement bullet is accelerating barrel to go out mostly
Speed at mouthful, the i.e. instantaneous velocity when installation laser velocimeter measurement bullet in bullet exit flies out, then by cutting process
Regard steady-state process as, so bullet velocity is considered to the cutting speed of entire cutting process, and cutting process and unstable state
Journey, cutting beginning is larger to cutting end speed difference, can generate large error to cutting scheme is studied；Using plane-plane contact
Slideway controls cutting movement direction, and the friction of slideway mechanism is sliding friction；In addition, loading skill currently based on Hopkinson pressure bar
The high-speed cutting experimental provision of art is mostly used for the dedicated unit of certain function, installs and uses inconvenience, it is difficult to it is several to modify cutter
What parameter (such as tool geometry angle) or machining condition realize orthogonal cutting, inclined cutting, do not have versatility, it is also necessary to dedicated
Design cutter and fixture, not processing site uses cutter, does not have and changes the anterior angle of cutter, relief angle, sword as needed and incline
The cutting function at angle and cutter.
Quick roll setting method is to study the experimental method of metal cutting deformation process, mainly with cam mechanism or spring mechanism
Realize quick roll setting.But this method is chiefly used in carrying out machining on lathe, and Hopkinson pressure bar test machine is relative to lathe
Research high speed machining mechanism has the following advantages: realizing high speed, easily convenient for observation chip deformation.But it at present can not also be in Hopkinson
The quick roll setting experiment of high-speed cutting is realized on testing machine and replacement cutter is inconvenient.
Summary of the invention
The purpose of the present invention is to provide one kind based on Hopkinson pressure bar loading technique for studying high speed machining mechanism
Experimental provision, it is processing site using cutter that cutter frame mechanism, which can be realized cutting cutter for same, can need to adjust according to research
Cutter gland changes tool orthogonal rake, relief angle, cutting edge inclination and Tool in Cutting function to replace cutter in turn；Direction control mechanism makes work
Part, which moves to contact with tool in cutting sword along linear bearing direction, carries out cutting movement, and sliding friction is become rolling friction；Energy-absorbing
Buffer gear is slowed down using compressed air energy-absorbing, is shot cutting process using high-speed camera, is shot by high-speed camera
The scale value of groove corresponding shaft bearing seat high scale ruler in photo on workpiece calculates instantaneous cutting velocity；Cutter frame mechanism combines movement
Direction control mechanism, light cylinder and synchronzed press cylinder synchronzed press make incident bar and transmission bar be taken up in order of priority reversed shock work
Part is, it can be achieved that the quick roll setting experiment of high-speed cutting；Entire cutting process can use dynamometer measurement cutting force；Cutter frame mechanism, movement
On the base, pedestal and Hopkinson pressure bar test machine guide rail cooperate for direction control mechanism and energy-absorbing buffering mechanism all integrated installations
Using, it can be achieved that fast quick-detach, convenient and practical, it is not required to design specialized equipment, there is certain versatility.In addition, this experiment is flat
Platform can be according to experiment demand selection installation energy absorption device, if not applicable energy absorption device, cooperates the synchronzed press of Hopkinson pressure bar
The quick roll setting of cutting process can be achieved.
In order to solve the above-mentioned technical problem, a kind of Modular high-speed based on Hopkinson pressure bar device proposed by the present invention
Cutting experiment platform, including base supports mechanism and high-speed camera；The base supports mechanism includes three foot of pedestal and camera
Frame；The pedestal includes pedestal bottom plate and pedestal vertical plate；The pedestal bottom plate is equipped with mounting hole；The side of the pedestal vertical plate
It is fixed with cutter frame mechanism, is equipped with dynamometer on pedestal bottom plate, positioned at the ipsilateral of cutter frame mechanism, the upper surface of described dynamometer is equipped with
Workpiece motion s direction control mechanism；The cutter frame mechanism includes the knife bar gland for being fixed on pedestal vertical plate side, the knife
Bar gland is a concave shape pressing plate, and knife bar, the knife bar and the pedestal are equipped between the knife bar gland and pedestal vertical plate
Knife bar adjustment block is equipped between vertical plate, the knife bar gland is equipped with multiple bolts hole, and the knife bar passes through multiple fastening bolts
It is fixed on the pedestal vertical plate, the front end of the knife bar is equipped with blade；The workpiece motion s direction control mechanism includes fixing
Bearing block on the dynamometer, the bearing block are equipped with axis hole, and one end of the axis hole is equipped with step surface, the axis hole
The other end is equipped with circlip, and the top of the bearing block is equipped with the axially open penetrated through with the axis hole, and the axis hole is built-in
Equipped with open-type linear bearing, the open-type linear bearing is equipped with workpiece installation axle, and the workpiece installation axle is equipped with work
Part mounting groove, the width of the workpiece installation slot and the width of workpiece are transition fit；The top surface of the bearing block is along axis hole
It is axially arranged with graduation mark；The pedestal vertical plate is equipped with through-hole.
Further, in the present invention, the center line of the through-hole and the workpiece installation axle are coaxial, the diameter of the through-hole
Greater than the radial dimension H for arriving workpiece installation axle at the top of workpiece.
The experiment porch further includes energy-absorbing buffering mechanism, the energy-absorbing buffering mechanism include be arranged on pedestal bottom plate and
High-precision lifting platform positioned at the other side of pedestal vertical plate；Cylinder block, the cylinder block are installed on the high-precision lifting platform
Interior installation cylinder is equipped with piston in the cylinder, and the front end of the cylinder is equipped with cylinder head, and the rear end of the cylinder is equipped with
Tracheae, the escape pipe are equipped with valve, and piston rod is connected on the piston, and the front of the piston rod is coaxial cylinders,
Barrel at the top of the coaxial cylinders is equipped with axially grooved, width of the axially grooved width greater than workpiece；
The piston rod and the workpiece installation axle are coaxial.
The center line of the through-hole and the workpiece installation axle are coaxial, and the diameter of the through-hole is simultaneously greater than the cylinder head
Outer diameter and workpiece at the top of arrive workpiece installation axle radial dimension H.
The top of the knife bar gland is equipped with lateral bent plate, and the transverse direction bent plate rides on the top surface of pedestal vertical plate.
The knife bar gland includes the wing plate of two sides, and two elongated through-holes up and down are equipped on every side wing, described elongated
The length of through-hole is consistent in the horizontal direction, is set on the pedestal vertical plate there are four threaded hole, the knife bar gland passes through four spiral shells
Bolt is connected on pedestal vertical plate.
Compared with prior art, the beneficial effects of the present invention are:
(1) Modular high-speed cutting experiment platform is used, cutting system can be realized on existing Hopkinson pressure bar device
Fast Installation, the cutting apparatus install convenient of system hit incident bar using high velocity bullet, and incident bar striking work is to realize high speed
Cutting obtains high strain-rate.
(2) cutter frame mechanism designed can hold out against real tool with cutter gland and bolt, can also more tool changing as needed
Have and then change tool orthogonal rake, relief angle, cutting edge inclination, realizes the cutting processes such as orthogonal, oblique angle.
(3) direction of motion control mechanism controls the direction of motion using open-type linear bearing, and the accurate precision of the direction of motion is high,
Sliding friction, which is become rolling friction, can substantially reduce frictional force, reduce energy loss.
(4) present invention is taken pictures with high-speed camera, according to the correspondence position of the graduated scale of workpiece groove and bearing block in photo
It sets and shooting time can measure workpiece cutting speed, keep cutting speed more acurrate.
(5) make synchronzed press cylinder and light cylinder synchronzed press, cylinder piston hits transmission to projectile impact incident bar simultaneously
Bar, make incident bar and transmission bar successively reversed striking work, it can be achieved that high-speed cutting quick roll setting experiment；Make the workpiece being cut
Moment quick separating is realized with cutter.
(6) dynamometer can be installed below direction of motion control mechanism if you need to measure cutting force, cutting process can pass through
Dynamometer measurement cutting force.
(7) cutter frame mechanism, direction of motion control mechanism and buffering energy-absorbing mechanism all install concentratedly on the base, pedestal with
The cooperation of testing machine guide rail is not required to design special proprietary mechanism, it can be achieved that convenient and efficient use installation.
Detailed description of the invention
Fig. 1 is the schematic perspective view of high-speed cutting experiment porch of the present invention；
Fig. 2 is the schematic perspective view at another visual angle of high-speed cutting experiment porch shown in Fig. 1；
Fig. 3 is the schematic perspective view of base supports mechanism shown in Fig. 1；
Fig. 4 is high-speed cutting experiment porch front sectional view of the present invention；
Fig. 5 is the partial structurtes enlarged drawing of middle section in Fig. 4；
Fig. 6 is the schematic perspective view of the bearing block in the present invention in workpiece motion s direction control mechanism；
Fig. 7 is workpiece motion s direction control mechanism structure sectional view shown in this Fig. 5；
Fig. 8 is workpiece scheme of installation shown in Fig. 7；
Fig. 9 is workpiece motion s direction control mechanism schematic diagram of the present invention；
Figure 10 is knife bar gland structure schematic diagram shown in Fig. 1；
Figure 11 is the structural schematic diagram of piston rod shown in Fig. 5；
Figure 12 is that the quick roll setting experiment schematic diagram of high-speed cutting is carried out using high-speed cutting experiment porch of the present invention；
Figure 13 is to carry out cutting speed and cutting force measurement schematic diagram using high-speed cutting experiment porch of the present invention.
In figure:
1- pedestal, 2- pedestal bottom plate, 3- pedestal vertical plate, 4- mounting hole, 5- dynamometer, 6- knife bar gland, 61- are laterally curved
Plate, 62- wing plate, 63- elongated through-hole, 64- bolt, 7- knife bar, 8- knife bar adjustment block, 9- bolt hole, 10- fastening bolt, 11- knife
Piece, 12- bearing block, 13- axis hole, 14- axially open, 15- open-type linear bearing, 16- workpiece installation axle, the installation of 17- workpiece
Slot, 18- graduation mark, 19- through-hole, 20- workpiece, 21- high-precision lifting platform, 22- cylinder block, 23- cylinder, 24- piston, 25- gas
Cylinder cap, 26- escape pipe, 27- valve, 28- piston rod, 29- coaxial cylinders, 30- is axially grooved, 31- threaded hole, 32- rubber pad,
33- circlip, 34- incident bar, 35- bullet, the light cylinder of 36-, 37- synchronzed press cylinder, 38- cylinder piston, 39- transmission
Bar, 40- step surface.
Specific embodiment
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific
Embodiment is only explained the present invention, is not intended to limit the invention.
The present invention proposes a kind of Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, including pedestal branch
Support mechanism, high-speed camera, cutter frame mechanism, workpiece motion s direction control mechanism, base supports mechanism further include having energy-absorbing slow
Punch mechanism, wherein the base supports mechanism is taken the photograph for installing fixed each components and relevant each functional entity, the high speed
Camera can realize that basis cuts tool orthogonal rake, relief angle, cutting edge inclination and cutter for measuring instantaneous cutting velocity, the cutter frame mechanism
The needs of function are cut to adjust or change cutter, the workpiece motion s direction control mechanism is for controlling cutting speed direction, peace
It fills workpiece, workpiece is driven to make the cutting movement along linear bearing direction, the energy-absorbing buffering mechanism is used for speed-buffering.
Experiment porch structure of the present invention is simple, and the convenient and efficient completion high-speed cutting of Hopkinson pressure bar test machine can be cooperated real
It tests and is tested with the quick roll setting of high-speed cutting, do not need the experimental provision of special designing.Experiment porch of the present invention is set using modularization
Meter, if carry out the quick roll setting of high-speed cutting using experiment porch provided by the invention and test, including functional module be base
Seat supports mechanism, high-speed camera, cutter frame mechanism and workpiece motion s direction control mechanism, as shown in figure 12.If utilized
When experiment porch of the present invention carries out cutting speed and cutting force measurement, as shown in figure 13, then addition is inhaled on the basis of the said structure
It can buffer gear.
The base supports mechanism includes pedestal 1 and camera trivets；The pedestal 1 includes that pedestal bottom plate 2 and pedestal are vertical
Plate 3；The pedestal bottom plate 2 is equipped with mounting hole 4, which is Slotted bores, makes base by screw and first loading nut cooperation
Seat is fixed on machine tool guideway.The pedestal vertical plate 3 is equipped with through-hole 19.As shown in Figure 3.It can be in pedestal vertical plate 3 and pedestal
Reinforcing rib is set between bottom plate 2, to improve the rigidity of whole system.
As shown in Figure 1, Figure 2 and Figure 4, the side of the pedestal vertical plate 3 is fixed with cutter frame mechanism, on pedestal bottom plate 2, position
Ipsilateral in cutter frame mechanism is equipped with dynamometer 5, and the upper surface of described dynamometer 5 is equipped with workpiece motion s direction control mechanism.
As shown in Figure 1, the cutter frame mechanism includes the knife bar gland 6 for being fixed on 3 side of pedestal vertical plate, such as Figure 10 institute
Show, the knife bar gland 6 is a concave shape pressing plate, and the top of the knife bar gland 6 is equipped with lateral bent plate 61, and the transverse direction is curved
Plate 61 is bonded as reference for installation with the top surface on pedestal vertical plate 3, guarantees that top surface is parallel with pedestal bottom plate 2 on pedestal vertical plate 3
Degree can guarantee the verticality of the knife bar 7 with processing axis.As shown in Figure 10, the knife bar gland 6 includes the wing plate of two sides
62, two elongated through-holes 63 up and down are equipped on every side wing 62, the length of the elongated through-hole 63 is consistent in the horizontal direction, such as
Shown in Fig. 3, adjustment cutter gland 6 can be controlled using the elongated through-hole 63, sets that there are four threaded holes on the pedestal vertical plate 3
31, the knife bar gland 6 is connected on pedestal vertical plate 3 by four bolts 64, as shown in Figure 1, the knife bar gland 6 and pedestal
It is equipped with knife bar 7 between vertical plate 3, knife bar adjustment block 8, the knife bar gland 6 are equipped between the knife bar 7 and the pedestal vertical plate 3
Multiple bolts hole 9 are equipped with, the knife bar 7 is fixed on the pedestal vertical plate 3 by multiple fastening bolts 10, the knife bar 7
Front end blade 11 is installed, and the height of knife bar 7 can be adjusted freely, and blade can be guaranteed by unscrewing bolt 10 by gravity
Step face contact on 11 cutting edge and workpiece 20 is locked knife bar 7 to screwing bolts 10 after knife.The knife bar 7 uses knife
Bar gland 6 is fixedly mounted on pedestal vertical plate 3, knife bar adjustment block 8 for cutter frame mechanism install and use different-thickness knife bar and
Design.As shown in Figure 4.Cutter used in the present invention (including knife bar 7 and blade 11) is knife used in processing site
Tool (such as: right angle lathe tool), cutter can be replaced as needed, change tool orthogonal rake, relief angle, cutting edge inclination and Tool in Cutting function.
As shown in Figure 4 and Figure 5, the workpiece motion s direction control mechanism includes the bearing being fixed on the dynamometer 5
Seat 12, the bearing block 12 are equipped with axis hole 13, and one end of the axis hole 13 is equipped with step surface 40, as shown in fig. 7, the axis hole 13
The other end be equipped with circlip 33, the top of bearing block 12 is equipped with the axial direction that penetrates through with the axis hole 13 as described in Fig. 5 and Fig. 7
Opening 14 is equipped with open-type linear bearing 15 in the axis hole 13, and the open-type linear bearing is by circlip for hole 33
It is axially fixed in bearing block 12 with the step surface 40 of bearing block 12, the open-type linear bearing 15 is equipped with workpiece installation axle
16, the workpiece installation axle 16 is equipped with workpiece installation slot 17, and the width of the width and workpiece 20 of the workpiece installation slot 17 is
Transition fit；The top surface of the bearing block 12 is axially arranged with graduation mark 18 along axis hole, as shown in fig. 6, can be using in bearing
The graduated scale for having graduation mark 18 is pasted in 12 top surfaces of seat, which can require to be replaced according to different accuracy, the workpiece
Groove is carved on 20, the cutting depth of workpiece 20 is machined with step surface on the top by being machined in workpiece 20, such as Fig. 7 institute
Show.When experiment, the workpiece 20 with groove is inserted into the workpiece installation slot 17 of workpiece installation axle 16, is between the two transition
Cooperation, the bottom surface of workpiece 20 are bonded with the bottom surface of workpiece installation slot 17, and workpiece 20 is fixed on workpiece installation axle by jackscrew
On 16, as shown in Figure 8；Then, the workpiece installation axle 16 with workpiece 20 is attached to in graduated bearing block 12, utilizes work
For groove on part 20 and on bearing block 12 to good position, workpiece installation axle 16 can free skating in open-type linear bearing 15
Dynamic, bearing block 12 is bolted on dynamometer 5, as shown in Figure 9.If do not need measurement cutting force, can also use etc.
High cushion block replaces dynamometer 5.It, can be according to workpiece groove pair in the different moments photo that high-speed camera is shot in experiment
Answer graduated scale difference scale value that can calculate instantaneous cutting velocity, high-speed camera can also be used to shoot cutting deformation process.
As shown in Figure 4 and Figure 5, the center line of through-hole 19 and the workpiece installation axle 16 are coaxial on the pedestal vertical plate 3, institute
The diameter for stating through-hole 19 is greater than the radial dimension H that workpiece installation axle 16 is arrived at the top of workpiece 20, as shown in Figure 8.
As shown in Fig. 2, Fig. 4 and Fig. 5, the energy-absorbing buffering mechanism includes being arranged on pedestal bottom plate 2 and standing positioned at pedestal
The high-precision lifting platform 21 of the other side of plate 3, is equipped with cylinder block 22 on the high-precision lifting platform 21, the cylinder block 22 with
Fixation is bolted in high-precision lifting platform 21.Cylinder 23 is installed in the cylinder block 22, is equipped with work in the cylinder 23
Plug 24, the front end of the cylinder 23 are equipped with cylinder head 25, and the rear end of the cylinder 23 is equipped with escape pipe 26, on the escape pipe 26
Equipped with valve 27, buffer capacity of the energy-absorbing buffering mechanism to speed, the piston 24 is adjusted in the openings of sizes of control valve 27
Upper installation sealing ring, piston rod 28 is connected on the piston 24, and the piston 24 is equipped with mounting groove and the connection of sealing ring
The threaded hole of piston rod 28, the rear end of the piston rod 28 are equipped with external screw thread, and the front of the piston rod 28 is coaxial cylinders 29,
Rubber pad 32 of the bottom installation of the coaxial cylinders 29 for buffering, as shown in figure 5, the barrel at 29 top of the coaxial cylinders
Axially grooved 30 are equipped with, axially grooved 30 width is greater than the width of workpiece 20；The piston rod 26 and the workpiece
Installation axle 16 is coaxial, and the high-precision lifting platform 21, which is used to support and adjusts height, keeps piston rod 26 and workpiece installation axle 16 same
Axis.The center line of the through-hole 19 and the workpiece installation axle 16 are coaxial, described logical in order to avoid there is the interference between mechanism
The diameter in hole 19 is simultaneously greater than the radial dimension H that workpiece installation axle 16 is arrived at the top of the outer diameter and workpiece 20 of the cylinder head 25.
High-speed camera in the present invention is fixed on camera trivets, and when experiment, reality will be placed on camera trivets
It tests scene to image for cutting process, according to the photo and shooting interval of high-speed camera shooting, different moments workpiece pair
Instantaneous cutting velocity can be calculated by answering graduated scale not have to position, and the high-speed camera in the present invention can also be used to shoot chip deformation
Process.
Cutting speed and cutting force measurement are carried out using high-speed cutting experiment porch of the present invention, as shown in figure 13, on pedestal 1
Knife bar mechanism, workpiece motion s direction control mechanism and energy-absorbing buffering mechanism are installed, and Hopkinson pressure bar test machine is cooperated to use.
Light cylinder 36 emits high velocity bullet 35, and the bullet 35 hits incident bar 34, and 34 striking work of incident bar, 20 right end is such as schemed
Shown in 5, workpiece 20 drives workpiece installation axle 16 to slide in open-type linear bearing 15, and then workpiece 20 is along open-type linear bearing
The movement of 15 directions is contacted with tool in cutting sword carries out cutting movement, and piston rod 28 is hit in 20 left end of workpiece, by piston 24 in gas
The deceleration of compressed air energy-absorbing stops cutting movement in cylinder 23, and high-speed camera shoots entire cutting process.Pass through high-speed camera
The calculating (as shown in Figure 9) of the scale value of 12 high scale ruler of groove corresponding shaft bearing seat in the photo of machine shooting on workpiece 20 is instantaneously cut
Cut speed.Dynamometer 5 is for measuring cutting process cutting force.
When needing quick roll setting experiment to obtain chip simulation Transient deformation situation, that is, utilize experiment porch of the present invention
(without energy-absorbing buffering mechanism, the bolt that cylinder block is connect with high-precision lifting platform only need to be removed, by a whole set of energy-absorbing buffering mechanism
Dismounting) it is tested with the quick roll setting of Hopkinson pressure bar test machine cooperation progress high-speed cutting, as shown in figure 12, it will be fixed with
The camera trivets of high-speed camera are placed in experimental provision side for observing the image of cutting process cutting region；It will be equipped with
The experiment porch of knife bar 7 and workpiece 20 is placed in Hopkinson pressure bar test machine system, keeps synchronzed press cylinder and light cylinder same
Step pressurization obtains equal pressure, and cylinder piston and bullet are simultaneously emitted by, projectile impact incident bar, and cylinder piston hits transmission bar,
Distance by adjusting workpiece 20 in front/rear end apart from transmission bar 39 and incident bar 34 makes the first striking work 20 of incident bar 34
Right end, 39 striking work of transmission bar stops workpiece 20 rapidly to 20 move distance s of workpiece (length that s is less than workpiece 20) afterwards, real
The existing quick roll setting experiment of high-speed cutting.
Although above in conjunction with attached drawing, invention has been described, and the invention is not limited to above-mentioned specific implementations
Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to of the invention
Within protection.
Claims (6)
1. a kind of Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, including base supports mechanism and high speed
Video camera；It is characterized by:
The base supports mechanism includes pedestal (1) and camera trivets；The pedestal (1) includes pedestal bottom plate (2) and pedestal
Vertical plate (3)；The pedestal bottom plate (2) is equipped with mounting hole (4)；
The side of the pedestal vertical plate (3) is fixed with cutter frame mechanism, sets on pedestal bottom plate (2), positioned at the ipsilateral of cutter frame mechanism
Have dynamometer (5), the upper surface of described dynamometer (5) is equipped with workpiece motion s direction control mechanism；
The cutter frame mechanism includes the knife bar gland (6) for being fixed on pedestal vertical plate (3) side, and the knife bar gland (6) is
One concave shape pressing plate, between the knife bar gland (6) and pedestal vertical plate (3) be equipped with knife bar (7), the knife bar (7) with it is described
Knife bar adjustment block (8) are equipped between pedestal vertical plate (3), the knife bar gland (6) is equipped with multiple bolts hole (9), the knife bar
(7) it is fixed on the pedestal vertical plate (3) by multiple fastening bolts (10), the front end of the knife bar (7) is equipped with blade (11)；
The workpiece motion s direction control mechanism includes the bearing block (12) being fixed on the dynamometer (5), the bearing block
(12) axis hole (13) are equipped with, one end of the axis hole (13) is equipped with step surface (40), and the other end of the axis hole (13) is equipped with bullet
Property retaining ring (33), the top of the bearing block (12) is equipped with the axially open (14) penetrated through with the axis hole (13), the axis hole
(13) it is equipped with open-type linear bearing (15) in, the open-type linear bearing (15) is equipped with workpiece installation axle (16), institute
Workpiece installation axle (16) are stated equipped with workpiece installation slot (17)；The width of the workpiece installation slot (17) and the width of workpiece (20)
For transition fit；The top surface of the bearing block (12) is axially arranged with graduation mark (18) along axis hole；
The pedestal vertical plate (3) is equipped with through-hole (19).
2. the Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, feature exist according to claim 1
In coaxially, the diameter of the through-hole (19) is greater than workpiece for the center line of the through-hole (19) and the workpiece installation axle (16)
(20) the radial dimension H of workpiece installation axle (16) is arrived at top.
3. the Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, feature exist according to claim 1
In the experiment porch further includes energy-absorbing buffering mechanism, and the energy-absorbing buffering mechanism includes being arranged on pedestal bottom plate (2) and position
High-precision lifting platform (21) in the other side of pedestal vertical plate (3)；Cylinder block is installed on the high-precision lifting platform (21)
(22), cylinder (23) are installed in the cylinder block (22), are equipped with piston (24) in the cylinder (23), the cylinder (23)
Front end is equipped with cylinder head (25), and the rear end of the cylinder (23) is equipped with escape pipe (26), and the escape pipe (26) is equipped with valve
(27), it is connected with piston rod (28) on the piston (24), the front of the piston rod (28) is coaxial cylinders (29), described same
Barrel at the top of axis cylinder (29) is equipped with axially grooved (30), and the width of axially grooved (30) is greater than the width of workpiece (20)
Degree；
The piston rod (26) and the workpiece installation axle (16) are coaxial.
4. the Modular high-speed cutting experiment platform based on Hopkinson pressure bar device, feature exist according to claim 3
In coaxially, the diameter of the through-hole (19) is simultaneously greater than institute for the center line of the through-hole (19) and the workpiece installation axle (16)
State the radial dimension H that workpiece installation axle (16) are arrived at the top of the outer diameter and workpiece (20) of cylinder head (25).
5. according to claim 1 to 4 any Modular high-speed cutting experiment platforms based on Hopkinson pressure bar device,
It is characterized in that, the top of the knife bar gland (6) is equipped with lateral bent plate (61), and the transverse direction bent plate (61) rides over pedestal vertical plate
(3) on top surface.
6. according to claim 1 to 4 any Modular high-speed cutting experiment platforms based on Hopkinson pressure bar device,
Be characterized in that, the knife bar gland (6) includes the wing plate (62) of two sides, be equipped on every side wing (62) up and down two it is elongated logical
The length in hole (63), the elongated through-hole (63) is consistent in the horizontal direction, is set on the pedestal vertical plate (3) there are four threaded hole
(31), the knife bar gland (6) is connected on pedestal vertical plate (3) by four bolts (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP4171808B2 (en) * | 2006-06-30 | 2008-10-29 | 国立大学法人茨城大学 | High speed cutting test equipment |
| CN102110389B (en) * | 2010-11-22 | 2012-09-26 | 沈阳工业大学 | Dynamic metal cutting process-observable experimental device |
| CN102175549B (en) * | 2011-03-02 | 2013-04-17 | 中国科学院力学研究所 | High-speed cutting experiment device based on Hopkinson pressure lever loading technology |
| CN102539265A (en) * | 2012-02-13 | 2012-07-04 | 中国科学院力学研究所 | High-speed cutting experiment device based on light-gas gun loading technique |
| CN103163037B (en) * | 2013-02-07 | 2015-04-29 | 中国科学院力学研究所 | High-speed restrained cutting experimental device based on split Hopkinson pressure bar loading technology |
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