CN207941814U - A kind of magnesium alloy precision tube temperature control drawing mechanism - Google Patents
A kind of magnesium alloy precision tube temperature control drawing mechanism Download PDFInfo
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- CN207941814U CN207941814U CN201820117928.1U CN201820117928U CN207941814U CN 207941814 U CN207941814 U CN 207941814U CN 201820117928 U CN201820117928 U CN 201820117928U CN 207941814 U CN207941814 U CN 207941814U
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- magnesium alloy
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- temperature control
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Abstract
The utility model discloses a kind of magnesium alloy precision tube temperature control drawing mechanisms; including drawing outer mould inner core die; drawing outer mould has inside cavity; drawing outer mould side is provided with coil fixing device; it is fixedly installed load coil on coil fixing device, galvanic couple mounting hole is offered inside drawing outer mould, temperature thermocouple is installed in the galvanic couple mounting hole; the side of drawing outer mould is provided with atmosphere protection cover, and argon gas input pipe is provided on the atmosphere protection cover.This kind of magnesium alloy precision tube temperature control drawing mechanism has the advantages that not available for technique and the simple in structure, prior arts such as implementation cost is low, easy to implement, processing quality is good.
Description
Technical field
The utility model is related to metal material processing field, especially a kind of magnesium alloy precision tube temperature control drawing mechanism.
Background technology
Magnesium alloy has many advantages, such as that density is low, pyroconductivity is high, damping is good, Cutting free, is counted as this century most
The engineering material for having development prospect, is applied in numerous areas such as Aeronautics and Astronautics, automobile, medical instruments.Due to
The characteristics of specific strength height, degradable absorption, magnesium alloy is seen as one of the best candidate material of the following new type medical equipment, especially
It is the innovation development of recent degradable angiocarpy bracket, even more promote magnesium alloy medical instruments field progress.
But the Patterns for Close-Packed Hexagonal Crystal structure of magnesium and magnesium alloy so that in deformation process, slip system starts less, affects it for it
Plastic deformation ability.Therefore, magnesium alloy is as device material, mostly by the techniques such as forging, extruding, drawing, rolling carry out at
Type is processed, and relatively reasonable deformation temperature is highly beneficial to the molding of magnesium alloy.However, at present for magnesium alloy
Processing is substantially using first preheating and then being processed, so in process since heat loss causes material to lose temperature, to
Influence the deformability of magnesium alloy.Therefore, in the deformation process of magnesium alloy, by the control to magnesium alloy temperature, to realize
Material precisely deforms.Based on such a thinking, it is necessary to it is reasonably heated during magnesium alloy deformation and from
Dynamic temperature control, to ensure that magnesium alloy is deformed within the scope of specific temperature, effectively to adjust the deformational behavior of magnesium alloy.
Magnesium alloy pipe is the important raw and processed materials of novel vascular stent exploitation, very high to the dimension precision requirement of tubing.
It is mainly drawing to be directed to the processing of this magnesium alloy precision tube at present, and during the drawing process, the influence of temperature is extremely important.
At ambient temperature, since the tube reducing of drawing die deforms, understand in the apparent deformation cumulative effect of internal surface of pipe generation, and room temperature
The low deformability of lower magnesium alloy can lead to the interim release that deformation is accumulated, to generate gauffer and concave-convex in inner surface
State influences pipe workpiece quality.However, with the raising of deformation temperature, the deformation plasticity of magnesium alloy will be obviously improved, and closed
Within the temperature range of reason, magnesium alloy can obtain the matching of best deformation performance and intensity, so control magnesium alloy deformation temperature
Degree is very significant to improving pipe workpiece quality.Therefore, actual needs are based on, develop a kind of magnesium alloy temperature control drawing process and
Its corresponding temperature control drawing mechanism is very valuable, can improve the precision and production efficiency of magnesium alloy precision tube,
Exploitation to novel degradable medical instrument is also great meaning.
It is lacked in view of this, the purpose of this utility model is to provide a kind of new technical solutions with solving existing technology
It falls into.
Utility model content
For overcome the deficiencies in the prior art, the utility model provides a kind of magnesium alloy precision tube temperature control drawing mechanism,
Solves magnesium alloy drawing deformation energy force difference of the existing technology, magnesium alloy pipe surface easy tos produce gauffer and concave-convex
The technological deficiencies such as state, tube-drawing be of poor quality.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of magnesium alloy precision tube temperature control drawing process, comprises the following steps that：
Step 1：Base head is processed, the base head of magnesium alloy pipe is first subjected to sensing heating to 200-250 DEG C, carries out twirl head
Processing, is then put into magnesium alloy pipe inner cavity by the inner core die for being coated with high-temperature lubricating grease；
Step 2：The magnesium alloy pipe assembled is put into and is coated with high temperature grease by the cooperation of pattern and magnesium alloy pipe
The inside cavity of the drawing outer mould of fat, and the inner core die front end is made to be located in the inside cavity of drawing outer mould, magnesium alloy pipe
Twirl head position be fixed on drawing head, the inner core die end is fixed on drawing equipment, and by laser positioning, makes inner core die
Axis and the axis of inside cavity of drawing outer mould coincide；
Step 3：Temperature control drawing is set to the induction heating temperature of magnesium alloy pipe as 210-280 DEG C, with 10-30 L/
Min rates are passed through argon gas to the space of magnesium alloy pipe sensing heating and continue 1-5 minutes, then start to add magnesium alloy pipe
Heat starts to carry out drawing to magnesium alloy pipe after the temperature of magnesium alloy pipe is stablized；
Step 4：Heat treatment carries out vacuum annealing process after every two passages processing to the magnesium-alloy tube machined；
Step 5：Aligning and surface polishing treatment, the magnesium-alloy tube obtained after drawing processing are thrown through aligning and surface clean
Final magnesium alloy pipe product is obtained after light.
As an improvement of the above technical solution, in the step 1, using the method for sensing heating to magnesium alloy pipe
Base head position carries out heating and the base head of magnesium alloy pipe position is heated to 220 DEG C.
As a further improvement of the above technical scheme, in the step 3, the drawing rate to magnesium alloy pipe is
The deflection of 150-600 mm/min, every time drawing of the magnesium alloy pipe are 10-30%.
As a further improvement of the above technical scheme, in the step 3, its temperature in magnesium alloy pipe drawing process
Fluctuation is at ± 5 DEG C.
As a further improvement of the above technical scheme, in the step 4, the annealing temperature of the molding magnesium-alloy tube of drawing
Degree is 300-360 DEG C, and the annealing time of magnesium-alloy tube is 10-20min.
As a further improvement of the above technical scheme, the yield strength of the molding magnesium alloy pipe of drawing is 150-
220MPa, the tensile strength 250-290MPa of magnesium alloy pipe, the outer diameter error of magnesium alloy pipe is in ± 0.04mm.
The utility model additionally provides a kind of magnesium alloy precision tube temperature control drawing mechanism, including drawing outer mould and cooperation
There is inside cavity, the inner core die may pass through the inside cavity simultaneously for the inner core die of the drawing outer mould, the drawing outer mould
It is magnesium alloy pipe to coordinate the drawing outer mould that magnesium alloy pipe is drawn into type, and the setting of drawing outer mould side is wired
Fixing device is enclosed, load coil is fixedly installed on the coil fixing device, galvanic couple is offered inside drawing outer mould
Mounting hole is equipped with temperature thermocouple, the temperature thermocouple and load coil in the galvanic couple mounting hole with being combined structure
As the automatic temp controller of the magnesium alloy precision tube temperature control drawing mechanism, the side of drawing outer mould is provided with atmosphere guarantor
Shield, argon gas input pipe is provided on the atmosphere protection cover, and the coil fixing device and load coil are located at described
Inside atmosphere protection cover.
As an improvement of the above technical solution, the inside cavity both ends of the drawing outer mould are respectively arranged with orthodrome transition
Slope structure and small arc-shaped transition slope structure, the inside cavity are hollow cylindrical cavity.
As a further improvement of the above technical scheme, the distance of the temperature thermocouple waits for the magnesium alloy pipe of drawing
Vertical range is 1.5-2.5mm, the diameter 30-60mm of the load coil, the length 50-150mm of load coil.
As a further improvement of the above technical scheme, the inner core die is elongated pole, and one end of inner core die is fixed on
On drawing equipment, in the inside cavity of the other end merging drawing outer mould of inner core die, the axis of the inside cavity of the drawing outer mould
The axis of line and inner core die overlaps, the argon gas input pipe on the atmosphere protection cover have it is multiple, multiple argon gas input pipes along
The radially spaced 60 ° of distributions of atmosphere protection cover.
The utility model has the beneficial effects that：The utility model provides a kind of magnesium alloy precision tube temperature control drawbench
Structure can enough ensure that magnesium alloy pipe exists by this kind of magnesium alloy precision tube temperature control drawing mechanism in processing magnesium alloy tubing process
Drawing pipes work is carried out in the environment of temperature control, the drawing that magnesium alloy pipe can be effectively promoted in the environment of constant high temperature becomes
Shape ability avoids magnesium alloy pipe surface from gauffer and deformation of unevenness occur, and the significant increase processing quality of magnesium alloy pipe has
Effect improves the market competitiveness of magnesium alloy pipe, has expanded its application range, user experience is more preferable.
In short, this kind of magnesium alloy precision tube temperature control drawing mechanism solves magnesium alloy drawing deformation of the existing technology
Can force difference, magnesium alloy pipe surface easy to produce gauffer and the technological deficiencies such as rough pattern, tube-drawing be of poor quality.
Description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the assembling schematic diagram of magnesium alloy precision tube temperature control drawing mechanism in the utility model.
Specific implementation mode
The technique effect of the design of the utility model, concrete structure and generation is carried out below with reference to embodiment and attached drawing
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
The other embodiment that art personnel are obtained without creative efforts belongs to the model of the utility model protection
It encloses.In addition, all connection/connection relations arrived involved in patent, not singly refer to component and directly connect, and referring to can be according to specific
Performance, by adding or reducing couple auxiliary, to form more preferably coupling structure.Each skill in the utility model creation
Art feature, can be with combination of interactions, referring to Fig.1 under the premise of not conflicting conflict.
A kind of magnesium alloy precision tube temperature control drawing process, comprises the following steps that：
Step 1：Base head is processed, the base head of magnesium alloy pipe 2 is first subjected to sensing heating to 200-250 DEG C, carries out twirl head
Processing, is then put into 2 inner cavity of magnesium alloy pipe by the inner core die 1 for being coated with high-temperature lubricating grease；
Step 2：The magnesium alloy pipe 2 assembled is put into and is coated with high temperature lubricating by the cooperation of pattern and magnesium alloy pipe 2
The inside cavity of the drawing outer mould 3 of grease, and 1 front end of the inner core die is made to be located in the inside cavity of drawing outer mould 3, magnesium alloy
The twirl head position of pipe 2 is fixed on drawing head, and 1 end of the inner core die is fixed on drawing equipment, and by laser positioning, makes
The axis of inner core die 2 and the axis of the inside cavity of drawing outer mould 3 coincide；
Step 3：Temperature control drawing is set to the induction heating temperature of magnesium alloy pipe 2 as 210-280 DEG C, with 10-30 L/
Min rates are passed through argon gas to the space of 2 sensing heating of magnesium alloy pipe and continue 1-5 minutes, then start to magnesium alloy pipe 2
Heating starts to carry out drawing to magnesium alloy pipe 2 after the temperature of magnesium alloy pipe 2 is stablized；
Step 4：Heat treatment carries out vacuum annealing process after every two passages processing to the magnesium-alloy tube machined；
Step 5：Aligning and surface polishing treatment, the magnesium-alloy tube obtained after drawing processing are thrown through aligning and surface clean
Final magnesium alloy pipe product is obtained after light.
Preferably, in the step 1, the base head position of magnesium alloy pipe 2 is heated using the method for sensing heating
And the base head of magnesium alloy pipe 2 position is heated to 220 DEG C.
Preferably, in the step 3, the drawing rate to magnesium alloy pipe 2 is 150-600 mm/min, and the magnesium closes
The deflection of 2 every time drawing of golden pipe is 10-30%.
Preferably, in the step 3, its temperature fluctuation is at ± 5 DEG C in 2 drawing process of magnesium alloy pipe.
Preferably, in the step 4, the annealing temperature of the molding magnesium-alloy tube of drawing is 300-360 DEG C, magnesium-alloy tube
Annealing time be 10-20min.
Preferably, the yield strength of the molding magnesium alloy pipe of drawing is 150-220MPa, and the tension of magnesium alloy pipe is strong
250-290MPa is spent, the outer diameter error of magnesium alloy pipe is in ± 0.04mm.
Based on above-mentioned magnesium alloy precision tube temperature control drawing process, it is accurate that the utility model additionally provides a kind of magnesium alloy
Tubing temperature control drawing mechanism, including drawing outer mould 3 and the inner core die 1 for coordinating the drawing outer mould 3, the drawing outer mould
3 there is inside cavity, the inner core die 1 may pass through the inside cavity and coordinate the drawing outer mould 3 by 2 drawing of magnesium alloy pipe
It is shaped to magnesium alloy pipe, 3 side of drawing outer mould is provided with coil fixing device 4, consolidates on the coil fixing device 4
Surely it is provided with load coil 5, galvanic couple mounting hole is offered inside drawing outer mould 3, is equipped in the galvanic couple mounting hole
Temperature thermocouple 6, the temperature thermocouple 6 and load coil 5, which match to be combined, is configured to the magnesium alloy precision tube temperature control
The side of the automatic temp controller of drawing mechanism, drawing outer mould 3 is provided with atmosphere protection cover 7, is set on the atmosphere protection cover 7
It is equipped with argon gas input pipe 8, the coil fixing device 4 and load coil 5 are located inside the atmosphere protection cover 7.
Preferably, the inside cavity both ends of the drawing outer mould 3 are respectively arranged with orthodrome transition slope structure 31 and small
Arc transition slope structure 32, the inside cavity are hollow cylindrical cavity.
Preferably, the distance of the temperature thermocouple 6 waits for that the vertical range of the magnesium alloy pipe 2 of drawing is 1.5-2.5mm,
The diameter 30-60mm of the load coil 5, the length 50-150mm of load coil 5.
Preferably, the inner core die 1 is elongated pole, and one end of inner core die 1 is fixed on drawing equipment, inner core die 1
The other end is placed in the inside cavity of drawing outer mould 3, the axis of the axis and inner core die 1 of the inside cavity of the drawing outer mould 3
It overlaps, the argon gas input pipe 8 on the atmosphere protection cover 7 has multiple, and multiple argon gas input pipes 8 are along 7 diameter of atmosphere protection cover
It is distributed to spaced 60 °.
Specific embodiment is chosen in the present embodiment with diameter phi 26mm, the Mg-4Zn-0.8Y-0.4Nd magnesium of wall thickness 1mm
Alloy pipe processes diameter phi 3.0mm, the tubing of wall thickness 0.2mm as processing pipe, using temperature control drawing process.
The tubing for choosing the φ 26mm wall thickness 1mm that length is 600mm, using load coil 5 by tubing end 30mm
Length quickly heats up to 210 DEG C, carries out twisting head processing, obtains the twirl Head Section of φ 20mm；The φ 19mm of high temperature grease will be coated with
Inner core die 1 is put into tubing inner cavity, and the magnesium alloy pipe assembled is put into the φ that drawing outer mould 3 is coated with high-temperature lubricating grease
Membrane cavity in 21mm, and 1 front end of inner core die is made to be located at inner membrance intracavitary, it twists head position and is fixed on drawing head, 1 end of inner core die is fixed
In drawing equipment, and by laser positioning, 1 axis of inner core die and 3 inner membrance cavity axis of drawing outer mould is made to coincide；Setting induction
Heating temperature is 240 DEG C, with 20 L/min rates to argon gas is passed through 3 minutes inside atmosphere protection cover 7, begins to warm up, waits for temperature
Stablize and start drawing after 240 DEG C, drawing rate is 200 mm/min；Drawing outer mould 3 and inner core die are replaced after drawing
1, repeat more than process；When total deformation is more than 50%, vacuum annealing heat treatment is carried out.Integrated artistic is as follows：
Temperature control is drawn to φ 21mm × 1.0mm, is drawn to φ 18mm × 0.8mm, vacuum annealing process 360 DEG C/15 again
Minute；
Temperature control is drawn to φ 14mm × 0.8mm, is drawn to φ 12mm × 0.6mm, vacuum annealing process 360 DEG C/15 again
Minute；
Temperature control is drawn to φ 8mm × 0.6mm, is drawn to φ 6mm × 0.4mm, 360 DEG C/15 points of vacuum annealing process again
Clock；
Temperature control is drawn to φ 5mm × 0.6mm, is drawn to φ 4mm × 0.3mm, 360 DEG C/15 points of vacuum annealing process again
Clock；
Temperature control is drawn to φ 3mm × 0.3mm, is drawn to φ 3mm × 0.2mm, 360 DEG C/15 points of vacuum annealing process again
Clock.
It is to be illustrated to the preferable implementation of the utility model, but the utility model creation is not limited to institute above
Embodiment is stated, those skilled in the art can also make various be equal without departing from the spirit of the present invention
Deformation is replaced, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of magnesium alloy precision tube temperature control drawing mechanism, it is characterised in that：Including drawing outer mould（3）And the cooperation drawing
Pull out outer mould（3）Inner core die（1）, the drawing outer mould（3）With inside cavity, the inner core die（1）It may pass through in described
Die cavity simultaneously coordinates the drawing outer mould（3）By magnesium alloy pipe（2）Drawing is shaped to magnesium alloy pipe, the drawing outer mould
（3）Side is provided with coil fixing device（4）, the coil fixing device（4）On be fixedly installed load coil（5）,
Drawing outer mould（3）Inside offers galvanic couple mounting hole, and temperature thermocouple is equipped in the galvanic couple mounting hole（6）, the survey
Warm galvanic couple（6）And load coil（5）It is configured to the automatic of the magnesium alloy precision tube temperature control drawing mechanism with being combined
Temperature regulating device, drawing outer mould（3）Side be provided with atmosphere protection cover（7）, the atmosphere protection cover（7）On be provided with argon gas
Input pipe（8）, the coil fixing device（4）And load coil（5）Positioned at the atmosphere protection cover（7）It is internal.
2. a kind of magnesium alloy precision tube temperature control drawing mechanism according to claim 1, it is characterised in that：Outside the drawing
Pattern（3）Inside cavity both ends be respectively arranged with orthodrome transition slope structure（31）And small arc-shaped transition slope structure（32）,
The inside cavity is hollow cylindrical cavity.
3. a kind of magnesium alloy precision tube temperature control drawing mechanism according to claim 1, it is characterised in that：The thermometric heat
Galvanic couple（6）Distance wait for the magnesium alloy pipe of drawing（2）Vertical range be 1.5-2.5mm, the load coil（5）'s
Diameter 30-60mm, load coil（5）Length 50-150mm.
4. a kind of magnesium alloy precision tube temperature control drawing mechanism according to claim 1, it is characterised in that：The inner core die
（1）For elongated pole, inner core die（1）One end be fixed on drawing equipment, inner core die（1）The other end be placed in drawing outer mould
（3）Inside cavity in, the drawing outer mould（3）Inside cavity axis and inner core die（1）Axis overlap, the atmosphere is protected
Shield（7）On argon gas input pipe（8）With multiple, multiple argon gas input pipes（8）Along atmosphere protection cover（7）It is radial mutual
Every 60 ° of distributions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820117928.1U CN207941814U (en) | 2018-01-23 | 2018-01-23 | A kind of magnesium alloy precision tube temperature control drawing mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820117928.1U CN207941814U (en) | 2018-01-23 | 2018-01-23 | A kind of magnesium alloy precision tube temperature control drawing mechanism |
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| CN207941814U true CN207941814U (en) | 2018-10-09 |
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| CN201820117928.1U Active CN207941814U (en) | 2018-01-23 | 2018-01-23 | A kind of magnesium alloy precision tube temperature control drawing mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015113A (en) * | 2018-01-23 | 2018-05-11 | 北京大学深圳研究院 | A kind of magnesium alloy precision tube temperature control drawing process and its temperature control drawing mechanism |
| CN111229856A (en) * | 2019-12-31 | 2020-06-05 | 南京理工大学 | Continuous twisting and drawing device and method for preparing isomeric magnesium alloy bar |
-
2018
- 2018-01-23 CN CN201820117928.1U patent/CN207941814U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015113A (en) * | 2018-01-23 | 2018-05-11 | 北京大学深圳研究院 | A kind of magnesium alloy precision tube temperature control drawing process and its temperature control drawing mechanism |
| CN111229856A (en) * | 2019-12-31 | 2020-06-05 | 南京理工大学 | Continuous twisting and drawing device and method for preparing isomeric magnesium alloy bar |
| CN111229856B (en) * | 2019-12-31 | 2022-03-08 | 南京理工大学 | Continuous twisting and drawing device and method for preparing isomeric magnesium alloy bar |
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