CN108160798A - Interior high pressure is cut somebody's hair - Google Patents
Interior high pressure is cut somebody's hair Download PDFInfo
- Publication number
- CN108160798A CN108160798A CN201810174697.2A CN201810174697A CN108160798A CN 108160798 A CN108160798 A CN 108160798A CN 201810174697 A CN201810174697 A CN 201810174697A CN 108160798 A CN108160798 A CN 108160798A
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- Prior art keywords
- push rod
- screw
- hair
- cut somebody
- high pressure
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- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 239000006052 feed supplement Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003806 hair structure Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of interior high pressures to cut somebody's hair, including：Push rod, has first end and the second end opposite with first end, one section composition tube chamber of the push rod from first end, which is furnished with liquid injecting mouth in push rod side；The first end of the push rod is connected with the sealing shroud for being docked with blank end；Connecting assembly, the middle part of the connecting assembly and the second end of push rod connect, and the both ends of connecting assembly are respectively with there are one screws；Leading screw is corresponded with screw, and about push rod to erect the plane of symmetry symmetrical for the two screw screw mechanisms cooperatively formed with corresponding side screw；And synchronous drive mechanism, output two leading screws of connection drive two leading screws, and the driving link of the synchronous drive mechanism is servo motor with synchronous.Interior high pressure according to the present invention is cut somebody's hair compact-sized, and it is high to push stability and Reliability comparotive.
Description
Technical field
The present invention relates to cut somebody's hair used in a kind of Internal High-pressure Forming Equipment.
Background technology
Internal high pressure forming is also hydroforming or Hydraulic shaping, is that one kind uses fluid as forming medium, passes through control
Interior pressure and material flow the material forming technique to reach shaped hollow part purpose.
Interior high-pressure molding is mainly used for pipe fitting（Pipe, square tube, shape tube etc.）Molding, corresponding Internal High-pressure Forming Equipment
Including mold, pressing device and Hydrodynamic unit, usual mold includes mold and lower mold, and mould is formed after being engaged at die joint
Has cavity.During processing, pipe is put into the cavity portion of lower mold, then transfers mold, and pipe is constrained in cavity.So
Each one positioned at pipe both ends, which cuts somebody's hair, afterwards withstands pipe respective end, provides pipe axial force, which is used for feed supplement.
One of those or two cut somebody's hair with hydraulic inlet, swollen for generating pipe for being filled into pipe
The liquid of shape, so that uniform wall thickness is obtained, have the feed supplement described in epimere.
In this it is found that fluid power is enough to be deformed pipe, that is to say, that there is very big pressure, thus, it cuts somebody's hair not
Pipe axial force is merely provided for, is provided outside the liquid with certain pressure intensity, also should be guaranteed that the sealing with pipe nozzle, this is close
The rank of envelope should be greater than being equal to the sealing grade that liquid pressure is allowed.If sealing grade is inadequate, shaping medium can be caused to lose
The defects of pressing, leading to insufficient pipe molding, corrugation, final product quality is unqualified in other words.
In general, cut somebody's hair should be engaged with blank end after generate based on type in face of close static seal, it is therefore, existing
It cuts somebody's hair the generally Driven by Hydraulic Cylinder by being capable of providing linear motion form.The impulse stroke of hydraulic cylinder is generally controlled based on stop
System, the axial feeding of workpiece can not accurately ensure.
Typically, as Chinese patent literature CN104438540A discloses a kind of low pressure internal high pressure forming dress of torsion beam
It puts, the first punch and the second punch realize positioning and sealing, and cut somebody's hair different from existing by circular conical surface and pipe,
Two forcer positions are fixed.The molding machine mainly by the extruding of a upper mold and two lower dies realize pipe molding rather than
Feed supplement is realized by the pusher cut somebody's hair, so as to so that forcer position is relatively fixed, solve the problems, such as axial to promote precision.
However, the universal individual of upper die and lower die is larger, as control object, control difficulty is with respect to bigger.Also, in general, upper mold
It is relatively fixed with position both after lower die pairing, given cavity can be formed, if dynamic control upper mold and lower die, in order to
Given cavity is obtained, manufacturing and designing difficulty all can be very big.
Chinese patent literature CN102172704A provides a kind of interior high pressure forming device, and punch is cut somebody's hair, by ball
Screw lead screw pair drives, and ball screw lead screw pair is then driven by feed servo motor, and servo motor cooperation ball-screw is several
The common driving device of lathe is controlled, precision is very high, and punch in other words is accurately fed so as to solve the problems, such as to cut somebody's hair.Only not
Silk rolling master screw mechanism needs the rotary motion of leading screw to be converted into the linear motion of screw, screw can by certain torque,
And making to cut somebody's hair has the tendency that torsion and leads to sealing engagement face discontinuity everywhere, influences sealing performance.In the patent document
In, rail brackets are also provided to be oriented to screw, but leading screw its rigidity under conditions of long length is not readily available
Ensure, although being also oriented in numerically-controlled machine tool using guide rail, leading screw rigidity is solved the problems, such as to connect, for example bed ways oneself
Body rigidity is very big, and the larger guide rail of setting rigidity is not easy in the side of cutting somebody's hair of interior high pressure forming device.
Invention content
The purpose of the present invention is to provide a kind of compact-sized, and push stability and the high interior high pressure of Reliability comparotive
It cuts somebody's hair.
A kind of interior high pressure is cut somebody's hair, including：
Push rod has first end and the second end opposite with first end, one section composition tube chamber of the push rod from first end, the pipe
Chamber is furnished with liquid injecting mouth in push rod side；The first end of the push rod is connected with the sealing shroud for being docked with blank end；
Connecting assembly, the middle part of the connecting assembly and the second end of push rod connect, and the both ends of connecting assembly are respectively with there are one silks
It is female；
Leading screw is corresponded with screw, and the two screw screw mechanisms cooperatively formed with corresponding side screw erect pair about push rod
Title face is symmetrical；And
Synchronous drive mechanism, output two leading screws of connection drive two leading screws, and the driving link of the synchronous drive mechanism is with synchronous
Servo motor.
Above-mentioned interior high pressure is cut somebody's hair, and optionally, two screw screw mechanisms are total to frame；
Rack corresponding to frame is matched there are four bearing block altogether, and two leading screws are respectively furnished with a pair of bearing.
Optionally, the side being connect in the middle part of connecting assembly with push rod is equipped with connecting seat.
Optionally, synchronous drive mechanism is located at the connecting assembly side opposite with connecting seat.
Optionally, synchronous drive mechanism is configured to：
Driving gear is assemblied on the output shaft of servo motor；
Two driven gears, the two driven gear numbers of teeth are identical, engaged with driving gear, and using the leading screw of corresponding side as gear shaft.
Optionally, the guide frame being oriented to push rod is further included.
Optionally, the guide frame is to be provided with pilot hole either the railroad shoe wherein pilot hole of guide sleeve or to lead
Guide hole guide rod pair or guide sleeve guide post pair are cooperatively formed to set and push rod.
In the present invention, with Chinese patent literature CN102172704A, also using screw screw mechanism as the drive cut somebody's hair
Dynamic part, difference is that the pusher section cut somebody's hair is driven by two leading screws, and the structure being configured is corresponding to two leading screws
Two screws are assemblied on a connecting assembly, and the middle part of connecting assembly is connect with push rod, and leading screw is to torque base caused by screw
Involve in the inside of two screw screw mechanisms and offset, push rod, the only axial thrust that push rod is obtained will not be acted on.Separately
Outside due to the presence of connecting assembly, two screw screw mechanisms live apart in the both sides of push rod, become smaller in the axial length of push rod, and
Under the conditions of existing for connecting assembly, support distances all become smaller overall stiffness, so as to which whole rigidity is easily guaranteed that, therefore, push away
The Reliability comparotive that bar pushes is high, in contrast, it is not easy to which unstability pushes stability and is improved.
Description of the drawings
Fig. 1 is that a kind of interior high pressure is cut somebody's hair structure diagram in one embodiment of the invention.
In figure：1. sealing shroud, 2. liquid injecting mouths, 3. push rods, 4. bearing blocks, 5. leading screws, 6. nut seats, 7.T type bars, 8. positioning
Nut, 9. bearing blocks, 10. bearings, 11. servo motors, 12. output shafts, 13. driving gears, 14. driven gears, 15. die holders.
Specific embodiment
A kind of interior high pressure with reference to shown in Figure of description 1 is cut somebody's hair, and for holding for blank end, and is perfused into pipe
The interior required liquid of high-pressure molding.
Although pipe is different, pipe axis may be space curve rather than plane curve or straight line, for
Pipe nozzle has determining axial direction, it is to be understood that the press direction cut somebody's hair in this field is the axis at pipe nozzle
To.
In Fig. 1, die holder 15 is a panel seat structure, for different pipes, may keep certain with horizontal plane
Angle, but since die holder 15 belongs to fixed setting structure, between horizontal plane having no effect on it there are angle fixes.It is assumed that
The axis of pipe is in the horizontal plane, then for die holder 15, bolt may be used and be fixed on the lathe bed of lathe.
The required axial push-in stroke of pipe molding is to determine, is not related to how to determine to promote in the present invention
Amount, but how to be accurately controlled push-in stroke under conditions of push-in stroke determines.
It cuts somebody's hair, although liquid compression ratio is very small, almost can be ignored, liquid usually makes for traditional hydraulic pressure
It is controlled with piston structure, piston structure is although sealing is very tight, but still can there are micro leakages.And for hydraulic pressure system
For system, a large amount of pipeline of generally use is attached, it is also necessary to independent hydraulic station be configured, integrally take up space larger, manage
Road connection can be there are more seal point, and whole leakage probability is also higher.For entire hydraulic system, if
There are leakage points in hydraulic oil transfer pipeline, can also influence it and promote precision, be that hydraulic pressure is typically based on what flow was promoted
Stroke Control.
In Chinese patent literature CN102172704A, cut somebody's hair using screw screw mechanism substitution hydraulic pressure, only it is pushed away
Head-tail directly constitutes screw, and leading screw is connect with tail portion of cutting somebody's hair, and due to cutting somebody's hair with certain stroke, causes in the axis cut somebody's hair
To the structure overhanging of institute's formation bar bar connection is long, and its configuration track of having nothing for it but.
The personnel of slightly machinery field experience both know about, and when rod piece overhanging is long, can generate natural deflection deformation, silk
Thick stick rotation easily generates electric shock, generated vibration influence sealing and propulsion precision when promoting.
In the construction shown in fig. 1, leading screw 5 is set parallel with push rod 3, and leading screw 5 is equipped with a pair, corresponding two silks
Thick stick 5 is lived apart in the both sides of push rod 3, and push head device bar bar can be greatly reduced and be connected to the axial length of push rod 3.
Specifically, it is push rod 3 first, push rod 3 is cut somebody's hair roughly the same with traditional in structure shown in Fig. 1, is one on the whole
A rod piece, matches the setting of runner, and at least part structure is configured to tube chamber.It should be noted that for rod piece, tube chamber portion
It is not that pipe fitting has smaller wall thickness like that divide, and essence only processes runner on rod piece.
Referring to Fig. 1, runner includes two parts, and a part is shaft orientation flowing channel, generally using drilling machine from one end of push rod 3
Direct pore-forming, another is radial flow path, can also use drilling machine straight forming, and two runners connect to form whole runner.
The centrifugation end of radial flow path is furnished with liquid injecting mouth 2, for connecting fluid pressure line.
It is readily apparent that shaft orientation flowing channel does not need to be too long, it is only necessary to avoid with the interference of pipe upper mold and lower die i.e.
Can, then it is the depth for matching shaft orientation flowing channel for the position of radial flow path, need to ensures that the two can connect.
Push rod 3 is also equipped with sealing shroud 1 in the left end of Fig. 1, and sealing shroud 1, will not for traditional cone seal head
Pipe pipe is caused to generate bulging.The taper surface of traditional cone seal head probes into pipe nozzle, and junction is toroid, when
When pressure of cutting somebody's hair is bigger, pipe nozzle can be influenced subsequent processing by distending.Sealing shroud 1 is then external member, and external member is used for handle
Pipe nozzle is included in, and the composition surface formed is larger, it is not easy to lead to pipe nozzle distortion.
The right end of push rod 3 in Fig. 1 connects a T-bar 7, and the main body of T-bar 7 is the rod piece vertical with the axis of push rod 3,
It is readily apparent that T-bar 7 can also form y-type structure, based on symmetrical, two arms of y-type structure are lived apart in the two of push rod 3
Side, and the perpendicular midship section about the axis of push rod 3 is symmetrical.
T-bar 7 is supplied to the axial reasoning of only push rod 3 of push rod 3, based on spiral lift by the constraint of two leading screws 5
Circumferential component caused by torque be cancelled in connecting assembly, without making push rod 3 by additional torque.
It is subject to corresponding, for T-bar 7, respectively there are one screw, nut seats 6, Ke Yili as shown in Figure 1 at both ends
Solution, in order to meet propulsion of the connecting assembly in 3 axial direction of push rod, the axis of nut seat 6 should be parallel with the axis of push rod 3, phase
Ying Di, the axis for matching the leading screw 5 for forming screw screw mechanism are also inevitable parallel with the axis of push rod 3.
In the construction shown in fig. 1, two leading screws 5 are connected as an assembly by the way that T-bar 7 is dynamic, form a frame knot
Structure, high and smaller in the axial length of push rod 3 more than the rigidity of single leading screw 5, whole stability is preferable.
In addition, for screw screw mechanism, because being connection, the cooperation of screw and leading screw has certain fit clearance,
Two leading screws 5 coordinate two screws to be based on movement and involve, can effectively eliminate it is radially unstable caused by fit clearance, so as to
Improve the stability in progradation.
Reference explanation book attached drawing 1 in aforementioned structure, actually contains two screw screw mechanisms, two screws in Fig. 1
Screw mechanism erects that the plane of symmetry is symmetrical about push rod 3, since the part promoted to push rod 3 is T-bar 7 shown in figure, T-bar 7
Be connected on two leading screws 5, constrained by two 5 centre-to-centre spacing of leading screw, push rod 3 be radially it is stable, pushed away without making
Bar 3 generates driving electric shock in progradation.
Leading screw 5 is driven by servo motor 11, can be accurately controlled the revolution of leading screw 5, so as to effectively control
The stroke of push rod 3 processed.
Servo motor 11 is usually equipped with rotary encoder, belongs to the motor of closed-loop control, does not need to that example is separately configured again
Such as grating scale measuring part, structure shown in comparison diagram 1 is cut somebody's hair with existing hydraulic pressure or screw screw mechanism is cut somebody's hair, and structure will
Compact many.
In addition, for two leading screws 5, identical specification is used, i.e. helix parameter is identical, and two leading screws 5 are adapted to
It needs to synchronize driving in the both ends of T-bar 7.In the construction shown in fig. 1, it is gear drive machine used by synchronous driving
Structure belongs to simplest lazy-tongs, it is clear that can be realized in simplest lazy-tongs, complicated lazy-tongs also can
It realizes.
Driving gear 13 forms central gear in Fig. 1, and two driven gears 14 are engaged with driving gear 13, can be engaged
Module is all identical, as long as the number of teeth is identical, then for gearratio with regard to identical, the number of teeth of two driven gears 14 is identical, is matched with same
The gearratio of one driving gear 13 is also identical.
Driving gear 13 is by being keyed the motor shaft in servo motor 11, i.e., on output shaft 12 shown in figure.It is driven
Gear 14 is circumferentially positioned using key connection realization in 5 end of leading screw, passes through the shaft shoulder and matches the realization axially position of location nut 8.
In the construction shown in fig. 1, two screw screw mechanisms are total to frame, i.e. common frame, die holder 15 as shown in Figure 1.
Rack corresponding to frame is matched there are four bearing block altogether, and bearing block 4 as shown in Figure 1, bearing block 9, two leading screws 5 are respectively matched
There is a pair of bearing.For in Chinese patent literature CN102172704A, one end of corresponding leading screw is because needing and progress of cutting somebody's hair
Thread fitting can not set bearing block at the end, and device overall stiffness is poor, and in structure as shown in Figure 1, in leading screw 5
Both ends can set bearing block, and without generating movement interference, overall stiffness is relatively good.
In some embodiments, the T-bar 7 shown in Fig. 1 may be constructed an overall structure with push rod 3, i.e., the two is straight
Welding is connect, forms a relatively large T-type structure.
In some embodiments, T-bar 7 is equipped with connecting seat, connecting seat with push rod 3 using releasable connection on T-bar 7
Using flange connection, can be attached by the end of bolt and push rod 3.
In addition, for push rod 3, it can also be further oriented to, to improve propulsion progress and structural reliability.
Preferably, push rod 3 is using circle member structure, then corresponding guide frame is is provided with pilot hole or guiding
Either guide sleeve cooperatively forms guide hole guide rod pair or guide sleeve guide post pair with push rod for the railroad shoe of set, wherein pilot hole.
Claims (7)
1. a kind of interior high pressure is cut somebody's hair, which is characterized in that including：
Push rod has first end and the second end opposite with first end, one section composition tube chamber of the push rod from first end, the pipe
Chamber is furnished with liquid injecting mouth in push rod side；The first end of the push rod is connected with the sealing shroud for being docked with blank end；
Connecting assembly, the middle part of the connecting assembly and the second end of push rod connect, and the both ends of connecting assembly are respectively with there are one silks
It is female；
Leading screw is corresponded with screw, and the two screw screw mechanisms cooperatively formed with corresponding side screw erect pair about push rod
Title face is symmetrical；And
Synchronous drive mechanism, output two leading screws of connection drive two leading screws, and the driving link of the synchronous drive mechanism is with synchronous
Servo motor.
2. interior high pressure according to claim 1 is cut somebody's hair, which is characterized in that two screw screw mechanisms are total to frame；
Rack corresponding to frame is matched there are four bearing block altogether, and two leading screws are respectively furnished with a pair of bearing.
3. interior high pressure according to claim 1 or 2 is cut somebody's hair, which is characterized in that one connect in the middle part of connecting assembly with push rod
Side is equipped with connecting seat.
4. interior high pressure according to claim 3 is cut somebody's hair, which is characterized in that synchronous drive mechanism is located at connecting assembly with connecting
The opposite side of seat.
5. interior high pressure according to claim 4 is cut somebody's hair, which is characterized in that synchronous drive mechanism is configured to：
Driving gear is assemblied on the output shaft of servo motor；
Two driven gears, the two driven gear numbers of teeth are identical, engaged with driving gear, and using the leading screw of corresponding side as gear shaft.
6. interior high pressure according to claim 1 is cut somebody's hair, which is characterized in that further includes the guiding knot being oriented to push rod
Structure.
7. interior high pressure according to claim 6 is cut somebody's hair, which is characterized in that the guide frame for be provided with pilot hole or
Either guide sleeve cooperatively forms guide hole guide rod pair or guide sleeve guide post pair with push rod for the railroad shoe of guide sleeve, wherein pilot hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174697.2A CN108160798A (en) | 2018-03-02 | 2018-03-02 | Interior high pressure is cut somebody's hair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174697.2A CN108160798A (en) | 2018-03-02 | 2018-03-02 | Interior high pressure is cut somebody's hair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108160798A true CN108160798A (en) | 2018-06-15 |
Family
ID=62510727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810174697.2A Pending CN108160798A (en) | 2018-03-02 | 2018-03-02 | Interior high pressure is cut somebody's hair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108160798A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001179749A (en) * | 1999-12-27 | 2001-07-03 | Sato Tekkosho:Kk | Molding die clamping device |
| CN102172704A (en) * | 2011-01-21 | 2011-09-07 | 西安交通大学 | Large-tonnage pipe internal high-pressure forming device |
| CN202438587U (en) * | 2012-03-02 | 2012-09-19 | 张家港合瑞车桥有限公司 | Combined sealing device for tube ends during hydraulic bulging |
| CN202517672U (en) * | 2012-04-01 | 2012-11-07 | 山东胜岳精密机械有限公司 | Electric injection transmission device for injection molding machine |
| CN202540654U (en) * | 2011-12-12 | 2012-11-21 | 宁波长飞亚塑料机械制造有限公司 | Synchronous double-lead-screw driving device of injection device of injection molding machine |
| CN205749349U (en) * | 2016-05-06 | 2016-11-30 | 扬州大学 | The dynamic force application apparatus of polycrystal X ray diffractometer sample stage |
| CN207929834U (en) * | 2018-03-02 | 2018-10-02 | 济南大学 | Interior high pressure is cut somebody's hair |
-
2018
- 2018-03-02 CN CN201810174697.2A patent/CN108160798A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001179749A (en) * | 1999-12-27 | 2001-07-03 | Sato Tekkosho:Kk | Molding die clamping device |
| CN102172704A (en) * | 2011-01-21 | 2011-09-07 | 西安交通大学 | Large-tonnage pipe internal high-pressure forming device |
| CN202540654U (en) * | 2011-12-12 | 2012-11-21 | 宁波长飞亚塑料机械制造有限公司 | Synchronous double-lead-screw driving device of injection device of injection molding machine |
| CN202438587U (en) * | 2012-03-02 | 2012-09-19 | 张家港合瑞车桥有限公司 | Combined sealing device for tube ends during hydraulic bulging |
| CN202517672U (en) * | 2012-04-01 | 2012-11-07 | 山东胜岳精密机械有限公司 | Electric injection transmission device for injection molding machine |
| CN205749349U (en) * | 2016-05-06 | 2016-11-30 | 扬州大学 | The dynamic force application apparatus of polycrystal X ray diffractometer sample stage |
| CN207929834U (en) * | 2018-03-02 | 2018-10-02 | 济南大学 | Interior high pressure is cut somebody's hair |
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Application publication date: 20180615 |
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