CN108787772A - A kind of medical fine tubing extrusion process - Google Patents
A kind of medical fine tubing extrusion process Download PDFInfo
- Publication number
- CN108787772A CN108787772A CN201710444857.6A CN201710444857A CN108787772A CN 108787772 A CN108787772 A CN 108787772A CN 201710444857 A CN201710444857 A CN 201710444857A CN 108787772 A CN108787772 A CN 108787772A
- Authority
- CN
- China
- Prior art keywords
- core bar
- sleeve
- extruding mold
- fine tubing
- extrusion process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/217—Tube extrusion presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/04—Mandrels
Abstract
The present invention provides a kind of medical fine tubing extrusion process, which includes extruding mold sleeve, limit core bar, pressure ram and sleeve jacking block composition.It is characterized in that, extruding mold sleeve and limit core bar are made of multigroup different dimensions respectively, by matching extruding mold sleeve and limit core bar specification, adjust the diameter and wall thickness of tubing output, under the active force of sleeve jacking block, pressure ram is pushed, completes medical fine tubing extrusion forming.
Description
Technical field
The present invention relates to technical field of metal material preparation, a kind of medical fine tubing extrusion process is suitable for gold
Belong to microcapillary extrusion forming.
Background technology
Extrusion molding has the superiority and reliability of bigger with it than other pressure processing methods such as rolling, forging in recent years
It is developed rapidly, the inductile hardly possible that extrusion forming can process rolling or forging method processing is had any problem or even can not be processed
The metal or alloy of deformation, extrusion forming processing have very big flexibility, and replacing extrusion die can complete in an equipment
Variously-shaped, specification production, gets out complete extrusion die, easy to operation when replacing extrusion die, take
When it is few, effect is high, in production, technological process is short, production operation is convenient, the conjunction for multi items, small lot, more specifications
Golden material processing is the most economic and practical.
Light metal has good compression properties, can be squeezed by different extrusion process and different mould structures
Type, in the past 30 years, the extrusion forming of light metal bar, tubing, wire rod production capacity on obtain lasting growth, squeeze
It is molded over proportion shared in light metal processing material also in rapid growth, global light metal squeeze wood in 2011 is up to 18,000,000 t/a
Left and right, accounts for 40% or more of world's light metal material total amount, and China is that light metal squeezes big country, China's light metal pipe in 2011,
Stick, type, wire rod annual capacity realize yield year up to 10,000,000 t/a or so up to 12,000,000 t/a or more, in recent years light metal squeeze wood
It is also being continually incremented, light-alloy squeeze wood purposes is very extensive, is related to the various aspects of production and living, is aerospace, army
The civilian important foundation material of engineer's device, petrochemical industry, business.
While the metal extrusion yield of sustainable growth, there is also some crucial technical barriers, such as
When metal superfine tube extrusion is molded, since diameter is small, wall thickness is thin, support strength is low, in extrusion forming, it may appear that eccentric,
Phenomena such as rupture, corrugation, lead to that fine tubing is unqualified or yield rate is low, in order to ensure above-mentioned metal superfine tube extrusion molding
Product quality and batch production, design and develop out it is a set of it is novel, efficient metal pipe material extrusion process is very necessary.
Invention content
The present invention provides a kind of medical fine tubing extrusion process, which includes extruding mold sleeve (1), limit core bar
(2), pressure ram (3) and sleeve jacking block (4) composition.It is characterized in that, extruding mold sleeve (1) and limit core bar (2) have respectively it is multigroup
Different dimensions compositions, by matching extruding mold sleeve (1) and limit core bar (2) specification, the diameter and wall of adjustment tubing output
Thickness pushes pressure ram (3) under the active force of sleeve jacking block (4), completes medical fine tubing extrusion forming.
To achieve the above object, the technical solution adopted by the present invention is：By being positioned to limit core bar (2), pre- anti-extrusion
When movement due to limit core bar (2) or wobble effects squeeze pipe workpiece quality, limited in core bar (2) by the raising of maximum possible
The diameter of supporting rod (2-2), the support strength of enhancing limit core bar (2), effectively reduces after by force effect, limit core bar (2)
Mobile or shaking, the stability of limit core bar (2) are an important factor for influencing fine pipe workpiece quality.
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that limit core bar (2) has limiting platform (2-
3), supporting rod (2-2) and core print (2-1) composition, wherein limiting platform (2-3) are adjustment extruding mold sleeve (1) and limit core print (2-
1) the important benchmark of relative position, can constrain the vertical and horizontal displacement of limit core bar (2), and supporting rod (2-2) is to ensure that pipe
The key component of material concentricity, higher support strength can greatly improve the stability of extruding, and core print (2-1) uses short distance
From orthodrome streamlined structure improves inner hole of pipe size, tolerance and inner wall surface matter while ensureing material flowability
Amount.
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that extruding mold sleeve (1) is squeezed according to fine tubing
Compressive strain process is divided into：Spacing zone (1-4), auxiliary deformation area (1-3), accurate deformed area (1-1), shaping area (1-2) and cutting
Area (1-5), the cooperation of spacing zone (1-4) and limiting platform (2-3) determine the structure size of output tubing, auxiliary deformation area (1-3)
Middle pipe provides basis for next step deformation and supports, accurate deformed area (1- with the raising creeping deformation of extruding force or temperature
1) it is most important link in entire fine tube extrusion, is the extruding mold sleeve with big streamline, best bright finish, precise measure
Inner wall and limit core bar core print composition, shaping area (1-2) is low-angle taper pore structure, is crimp and qualitative point of cooling
Battery limit (BL), can make that the pipe of plastic deformation carries out natural cooling under the premise of not influencing tube surfaces quality or cooling device is cold
But, it completes to cut according to scale or other needs after extruding is qualitative and cut region when Crop Area (1-5).
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that limit core bar (2) core print (2-1) by
Setting face (2-1-1), deformation plance (2-1-2), predeformation face (2-1-3) and supporting surface (2-1-4) composition, extrusion tube blank pass through branch
Support face (2-1-4) starts, through predeformation face (2-1-3) creeping deformation, after deformation plance (2-1-2), in setting face (2-1-1)
Solidating simultaneously completes fine tubing extrusion forming.
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that metal superfine tube extrusion can be completed
Especially in low-temperature alloy application aspect, the pipe diameter that can be squeezed is ranging from：1.2 ~ 4mm, tube wall thickness ranging from 0.2 ~
0.6mm。
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that extrusion billet is cylindrical barrel structure,
Extruding mold sleeve (1) and limit core bar (2) are made of one group of different series specification respectively, make the diameter range of extrusion billet be：
20mm ~ 100mm, endoporus ranging from 5 ~ 10mm, length range are 30 ~ 200mm.
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that pressure ram (3) is mainly by squeezing rod
(3-1), sliding groove (3-2) form, and squeezing rod (3-1) is slidably matched with extruding mold sleeve (1) lumen orifice, sliding groove (3-2) and limit
Position core bar (2) is slidably matched.
The above-mentioned medical fine tubing extrusion process of one kind, which is characterized in that sleeve jacking block (4) is by connecting stud (4-
1) and adaptive device (4-2) composition, this patent embodiment select 20T forcing presses to squeeze fine tubing, in order to pressure head
Proper fit, adaptive device are designed as sleeve-shaped jacking block, can be matched on different extrusion equipments and make different connection structures.
Description of the drawings
Fig. 1, extrusion structure schematic diagram.
Fig. 2, extruding mold sleeve structural schematic diagram.
Fig. 3, limit core bar core head structure schematic diagram.
Fig. 4, medical microcapillary crimp mechanism figure.
Reference sign：
1, extruding mold sleeve 2, limit core bar 3, pressure ram
4, sleeve jacking block 5, fine tubing 6, cavity
1-1, precision deformed area 1-2, shaping area 1-3, auxiliary deformation area
1-4, spacing zone 1-5, Crop Area 2-1, core print
2-2, supporting rod 2-3, limiting platform 2-1-1, setting face
2-1-2, deformation plance 2-1-3, predeformation face 2-1-4, supporting surface
3-1, squeezing rod 3-2, sliding groove 4-1, connecting stud 4-2, adaptive device.
Specific implementation mode
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
A kind of medical fine tubing extrusion process as shown in Figure 1, including extruding mold sleeve (1), limit core bar (2), squeeze
Extruding mold sleeve (1) is mounted in 20T extrusion equipments work axle sleeve, then selects by compression bar (3) and sleeve jacking block (4) first
The pressure ram (3) to match with extruding mold sleeve (1) is selected, the limit core bar (2) that reselection matches with pressure ram (3) will limit
After core bar (2) is mounted on pressure ram (3), it is an entirety to be connected through a screw thread with sleeve jacking block (4) assembly, through sleeve jacking block
(4) sleeve of one end is fixed on the pressure head front of extrusion equipment, corrects the pressure head of extrusion equipment and the straightness of axle sleeve and coaxial
Extruding metal pipe is penetrated on limit core bar (2) after accurate, adjusts the displacement of extrusion equipment pressure head, make pressure ram by degree
(3) and extruding mold sleeve (1) reaches position appropriate, finally adjusts temperature regulating device, sets the soaking time of suitable temperature, to temperature
After start extruder, compressed metal pipe fine tubing of completion after extruding mold sleeve (1) and limit core bar (2) are qualitative is squeezed into
Type.
In the present embodiment, in conjunction with Fig. 2, needs to prepare Φ 2 × 0.2mm light metal alloy microcapillaries, squeeze metal superfine pipe
When material, accurate deformed area in the extruding mold sleeve (1)（1-1）Diameter dimension is Φ 2mm, cavity（6）A diameter of Φ 40mm, height
For 50mm, cavity（6）, auxiliary deformation area（1-3）, accurate deformed area（1-1）It is connected gliding surfaces roughness and is less than 0.4 μm.
In conjunction with Fig. 1, Fig. 3, a diameter of Φ 6mm of supporting rod (2-2) in the limit core bar (2), supporting rod (2-2) with limit
Platform（2-3）It is structure as a whole and junction has 2.0 × 45 ° of chamferings, the other end of supporting rod (2-2) to have core print（2-1）, core print
Middle setting face（2-1-1）A diameter of Φ 1.6mm, core print（2-1）It is by deformation plance between supporting rod (2-2)（2-1-2）With
Predeformation face（2-1-3）Curve transition, limit core bar (2) overall surface roughness are less than 0.4 μm, and smooth surface can make material
Stream is dynamic more smooth.
As shown in Figure 1, having Φ 6mm through-holes, squeezing rod (3- on the pressure ram (3) generally step round shape and central shaft
1) it is cylinder, there are spill sliding groove (3-2), wherein squeezing rod in back end cylindrical side（3-1）A diameter of Φ 40mm 0/-
0.02mm is highly 55mm, sliding groove（3-2）Width δ 16mm are highly 50mm, and sliding groove has 2.0 × 45 ° with central through hole
Chamfering, it is desirable that pressure ram (3) entirety outer surface and central through hole roughness are less than 0.4 μm.The present embodiment extruding is in existing 20T
It is carried out on extrusion equipment, extruder top is Φ 100mm cylinders, is produced by size and is matched with extruder top and pressure ram (3)
Sleeve jacking block (4), be mutually permanently connected by screw thread and screw.
In conjunction with Fig. 1, Fig. 4, need to prepare Φ 2 × 0.2mm light metal alloy microcapillaries, pipe is cylindrical barrel, outer diameter
For Φ 40mm, internal diameter is Φ 6mm, is highly 40mm, is installed on first on limit core bar (2), adjusts extrusion equipment top
It is moved to pressure ram (3) and extruding mold sleeve (1) matching position, pipe is made to be in extruding mold sleeve cavity (6), adjusts temperature regulating device
Heating temperature is set to 420 DEG C of soaking time 30min, to temperature after start extruder top pressure ram (3) pushed to make pipe crowded
Pressing mould sleeve (1) inner cavity is completed metal superfine tube extrusion by crush zone, predeformation area, deformed area and shaping area and is molded, and
Crop Area scale 500mm is cut off, and is detected through magnifying glass and micrometer, fine tubing appearance and size, concentricity and surface state symbol
Design requirement is closed, it being capable of the continuously extruded metal superfine tubing of small lot.
The above is only presently preferred embodiments of the present invention, is not imposed any restrictions to the present invention, every according to the present invention
Technical spirit changes any simple modification, change and equivalent structure made by above example, still falls within skill of the present invention
In the protection domain of art scheme.
Claims (4)
1. a kind of medical fine tubing extrusion process, which includes extruding mold sleeve (1), limit core bar (2), pressure ram
(3) it is formed with sleeve jacking block (4).
2. it is characterized in that, extruding mold sleeve (1) and limit core bar (2) are made of multigroup different dimensions respectively, pass through apolegamy
Extruding mold sleeve (1) and limit core bar (2) specification, the diameter and wall thickness of adjustment tubing output, the active force in sleeve jacking block (4)
Under, pressure ram (3) is pushed, medical fine tubing extrusion forming is completed.
3. the medical fine tubing extrusion process of one kind according to claim 1, which is characterized in that limit core bar (2)
It is made of limiting platform (2-3), supporting rod (2-2) and core print (2-1), wherein core print (2-1) is located at the front end supporting rod (2-2),
Core print size is the hole size of medical fine tubing, and ranging from 0.8 ~ 3.6mm, supporting rod (2-2) size range is 5 ~ 10mm.
4. the medical fine tubing extrusion process of one kind according to claim 1, which is characterized in that extruding mold sleeve (1)
It is to be relatively fixed structure with limit core bar (2), when stress squeezes, core bar is not moved with flowing is squeezed, and is effectively controlled according to this micro-
Appearance and size, cylindricity, concentricity and the inside and outside wall surface smoothness of tubule material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710290372 | 2017-04-28 | ||
| CN2017102903726 | 2017-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108787772A true CN108787772A (en) | 2018-11-13 |
Family
ID=64094532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710444857.6A Pending CN108787772A (en) | 2017-04-28 | 2017-06-14 | A kind of medical fine tubing extrusion process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB884410A (en) * | 1959-06-02 | 1961-12-13 | Ti Group Services Ltd | Manufacture of beryllium tubes |
| US4137745A (en) * | 1976-03-05 | 1979-02-06 | Muratov Rustem I | Device for extruding hollow articles |
| CN101549361A (en) * | 2009-05-08 | 2009-10-07 | 重庆大学 | Rare-earth magnesium alloy seamless thin wall tubule hot-extrusion method and its specialized mold |
| CN202270753U (en) * | 2011-10-25 | 2012-06-13 | 邹平县长山型材有限公司 | Seamless tube forming device |
| CN203235774U (en) * | 2013-05-17 | 2013-10-16 | 太原重工股份有限公司 | Combined die for extruding aluminum alloy tube |
| CN203803957U (en) * | 2014-02-28 | 2014-09-03 | 山东兖矿轻合金有限公司 | Special-shaped aluminium alloy seamless square tube extrusion die |
-
2017
- 2017-06-14 CN CN201710444857.6A patent/CN108787772A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB884410A (en) * | 1959-06-02 | 1961-12-13 | Ti Group Services Ltd | Manufacture of beryllium tubes |
| US4137745A (en) * | 1976-03-05 | 1979-02-06 | Muratov Rustem I | Device for extruding hollow articles |
| CN101549361A (en) * | 2009-05-08 | 2009-10-07 | 重庆大学 | Rare-earth magnesium alloy seamless thin wall tubule hot-extrusion method and its specialized mold |
| CN202270753U (en) * | 2011-10-25 | 2012-06-13 | 邹平县长山型材有限公司 | Seamless tube forming device |
| CN203235774U (en) * | 2013-05-17 | 2013-10-16 | 太原重工股份有限公司 | Combined die for extruding aluminum alloy tube |
| CN203803957U (en) * | 2014-02-28 | 2014-09-03 | 山东兖矿轻合金有限公司 | Special-shaped aluminium alloy seamless square tube extrusion die |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181113 |
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| WD01 | Invention patent application deemed withdrawn after publication |