CN108941234A - A kind of control method of the extruded velocity of microchannel aluminium flat conduit - Google Patents
A kind of control method of the extruded velocity of microchannel aluminium flat conduit Download PDFInfo
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- CN108941234A CN108941234A CN201810743109.2A CN201810743109A CN108941234A CN 108941234 A CN108941234 A CN 108941234A CN 201810743109 A CN201810743109 A CN 201810743109A CN 108941234 A CN108941234 A CN 108941234A
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- Prior art keywords
- flat conduit
- aluminium flat
- acceleration
- microchannel aluminium
- extruded velocity
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Classifications
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- 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
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with 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
- 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
- B21C23/10—Making finned tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a kind of control methods of the extruded velocity of microchannel aluminium flat conduit, including 1), using extrusion equipment to raw material aluminium bar squeeze, and after extruding starts, microchannel aluminium flat conduit extruded velocity is increased since 0 with the even acceleration of the first acceleration A 1；2) when, monitoring that microchannel aluminium flat conduit extruded velocity reaches stabilized speed V1, extrusion equipment control microchannel aluminium flat conduit is at the uniform velocity squeezed out with stabilized speed V1, with duration that stabilized speed V1 is at the uniform velocity squeezed out for T；3), extrusion equipment is controlled microchannel aluminium flat conduit extruded velocity and is increased since V1 with the even acceleration of the second acceleration A 2, until microchannel aluminium flat conduit extruded velocity reaches maximum speed Vmax, is then at the uniform velocity squeezed out with maximum speed Vmax.The present invention is automatically controlled using extrusion equipment, and segmentation controls microchannel aluminium flat conduit extruded velocity, and control precision is high, stable equipment operation, and flat tube reinforcing rib position feed sufficiently, is not easy that reinforcing rib is made to deform, the stability of product is strong.
Description
Technical field
The present invention relates to a kind of control methods of the extruded velocity of microchannel aluminium flat conduit.
Background technique
Microchannel aluminium flat conduit is mainly used for the heat exchanger in air conditioning for automobiles and domestic air conditioning, and function is as air conditioner coolant
Flow pipe.Air conditioner industry mainly has two o'clock to the performance requirement of flat tube: size requires and burst pressure requirement.Size requirement
It is normally stored down to 0.01mm, the requirement of some models flat tube burst pressure can be more than 30MPa.Micro-channel flat size is most rambunctious
It is exactly Rib Thickness, and flat tube burst pressure is influenced also very greatly by Rib Thickness.So flat tube Rib Thickness is
One of most important performance of product, and one of performance being most difficult to ensure.
The Rib Thickness of flat tube is difficult to control, and main cause is: the extrusion ratio of micro-channel flat is very big, many models
Extrusion ratio be more than 500, in extrusion process, frictional resistance is very big, it is easy to it is under feeding flat tube reinforcing rib occur, cause plus
Strengthening tendons become infundibulate from rectangle, and Rib Thickness exceeds lower tolerance, and flat tube burst pressure does not reach requirement.It (remarks: squeezes
Than characterizing from raw material aluminium bar to the deformation extent of product flat tube, the sectional area of aluminium bar is expressed as divided by the sectional area of flat tube)
By collecting a large amount of product data, discovery reinforcing rib deformation, which occurs mainly in, squeezes the initial stage, that is, squeezes speed
Spend the improvement stage.Analyze reason are as follows: squeeze the initial stage, raw material aluminium bar longest, resistance when extruding is maximum, and extrusion speed
It is being promoted, is needing squeeze pressure to overcome resistance and provide an acceleration for product.The stage is easy to happen squeeze pressure cannot
Meet demand deforms so that flat tube reinforcing rib is under feeding.Current pressing method is manually controlled mainly by worker, artificially
Factor influences very big, it is difficult to guarantee the stability of reinforcing rib.
Summary of the invention
The purpose of the present invention is to provide a kind of control methods of the extruded velocity of microchannel aluminium flat conduit, solve the prior art
In the extrusion of microchannel aluminium flat conduit is manually controlled by worker, extruded velocity is difficult to control, and stability is poor, leads to microchannel aluminium flat conduit
Reinforcing rib deformation, flat tube size burst pressure are unsatisfactory for the technical issues of requiring.
In order to solve the above-mentioned technical problem the present invention, adopts the following technical scheme that
A kind of control method of the extruded velocity of microchannel aluminium flat conduit, includes the following steps:
1), raw material aluminium bar is squeezed using extrusion equipment, produces microchannel aluminium flat conduit；It is micro- logical after extruding starts
Road aluminium flat conduit extruded velocity is increased since 0 with the even acceleration of the first acceleration A 1, extrusion equipment real-time monitoring microchannel aluminium flat conduit
Extruded velocity；
2) when, monitoring that microchannel aluminium flat conduit extruded velocity reaches stabilized speed V1, it is flat that extrusion equipment controls microchannel aluminium
Pipe is at the uniform velocity squeezed out with stabilized speed V1, with duration that stabilized speed V1 is at the uniform velocity squeezed out for T；
3), extrusion equipment is controlled microchannel aluminium flat conduit extruded velocity and is increased since V1 with the even acceleration of the second acceleration A 2,
Reach maximum speed Vmax to microchannel aluminium flat conduit extruded velocity, then at the uniform velocity squeezed out with maximum speed Vmax, until raw material aluminium
Stick extruding terminates；
First acceleration A 1, the unit of the second acceleration A 2 are m/s2, the unit of V1, Vmax are m/s, duration
The unit of T is s.
Existing fashion of extrusion is manually controlled mainly by worker, and human factor influences very big, it is difficult to guarantee the stabilization of product
Property.If the experience of worker is insufficient, it is too fast to squeeze initial stage speed-raising, it is possible to generate the generation under feeding of flat tube reinforcing rib
Deformation, causes flat tube size and burst pressure undesirable.The present invention is automatically controlled using extrusion equipment, by controller
Software section improve, Discrete control is carried out to microchannel aluminium flat conduit extruded velocity, control precision is high, and equipment operation is steady
It is fixed, make the stage squeeze pressure meet demand, flat tube reinforcing rib position feed sufficiently, is not easy that reinforcing rib is made to deform, eliminate
The influence of human factor, the stability of product are strong.
It is using the reason of Discrete control: squeezes the initial stage, raw material aluminium bar longest, resistance when extruding is maximum, and
Extrusion speed is being promoted, and is needed squeeze pressure to overcome resistance and is provided an acceleration for product.The stage is easy to happen extruding
Pressure is unable to the case where meet demand, deforms so that flat tube reinforcing rib is under feeding.Discrete control is used to extrusion speed,
Extrusion speed from 0 accelerate to setting value after, speed is not further added by, keep constant-speed operation.The constant-speed operation stage does not need to squeeze
Pressure provides acceleration, and squeeze pressure only needs to overcome resistance, and squeeze pressure is made to readily satisfy demand, avoid the occurrence of flat tube and add
Strengthening tendons are under feeding to deform.After flat tube constant-speed operation for a period of time after, part aluminium bar has been squeezed into flat tube, aluminium bar length
Reduce, resistance reduces, and at this time flat tube speed increases, and squeeze pressure is enough to overcome resistance not one acceleration of flat tube offer.
Moreover, automatically controlling extrusion process by equipment, control precision is high, and stable equipment operation eliminates human factor
It influences, the stability of product is strong.The extrusion equipment is existing equipment, and specific structure repeats no more, model XJ-2500T, purchase
In company of Wuxi Yuanchang Machinery Co., Ltd..
It is further improved, before extruding starts, by input terminal by the first acceleration A 1, the second acceleration A 2, stabilized speed
V1, maximum speed Vmax and each parameter value of duration T input to the controller of extrusion equipment.It is flat according to microchannel aluminium to be extruded
The specification of pipe sets the first acceleration A 1, the second acceleration A 2, stabilized speed V1, maximum speed on extrusion equipment in advance
Vmax and each parameter value of duration T, then the controller of extrusion equipment is squeezed according to setup parameter automatic running.
It is further improved, the stabilized speed V1 is less than microchannel aluminium flat conduit spray zinc and starts speed.Because when flat tube squeezes out
When stabilized speed V1 is less than spray zinc starting speed, spray zinc equipment not will start, and flat tube is not spray zinc, belongs to technique and scraps, i.e.,
So that this part flat tube reinforcing rib is occurred under feeding, client will not be flowed into.Spraying zinc starting speed is 0.5m/s, stabilized speed
The range of V1 is 0.33-0.42m/s.Portion extrusion aluminium profile product has higher requirement to corrosion resistance, produces to improve
The corrosion resistance of product, general treating method is in extrusion process, using spray zinc equipment in microchannel aluminium flat conduit in industry
Surface sprays one layer of zinc.When spraying zinc starting speed indicates spray zinc equipment starting, microchannel aluminium flat conduit extruded velocity.When microchannel aluminium
When flat tube extruded velocity is less than spray zinc starting speed, spray zinc equipment is in close state, not to microchannel aluminium flat conduit extruded velocity
Surface carries out spray zinc, this section that microchannel aluminium flat conduit end does not spray zinc belongs to technique and scraps section.Usually spray zinc starting speed is
0.5m/s, the setting range of stabilized speed V1 are 0.33-0.42m/s.
It is further improved, the range of first acceleration A 1 is 0.02-0.05m/s2, the range of the second acceleration A 2 is
0.02-0.08m/s2, the range of A1 and A2 are determined according to the summary of the characteristic and long-term production experience of extrusion equipment, upper
It states in parameter area, flat tube reinforcing rib position feed sufficiently, is not easy that reinforcing rib is made to deform, the stability of product is strong.And it is micro-
The meter Chong Yue of channel aluminium flat conduit is big, and the first acceleration A 1,2 value of the second acceleration A are smaller.Meter Chong refers to every meter of microchannel aluminium flat conduit
Weight, when the timing of extrusion speed one, meter Chong Yue is big, indicates that the flat tube weight of extrusion per second is bigger.
It is further improved, the range of the maximum speed Vmax is 0.75-1.67m/s.The range of Vmax is by extrusion equipment
Characteristic and the characteristic of flat tube comprehensive determine.
It is further improved, the range of the duration T is 5-15s.The range of choice of T will reach two o'clock requirement: first is that
Its lower limit will make after stablizing the time, and squeeze pressure has decreasing trend, indicate that squeeze pressure has surplus energy to provide one for flat tube
Acceleration；Second is that its upper limit will make microchannel aluminium flat conduit end, actually not spraying new length≤process stipulation does not spray zinc length.Because
The stabilized speed V1 of flat tube is less than spray zinc starting speed, i.e. in the constant-speed operation stage, flat tube, which does not spray zinc, to be scrapped, so when
Between cannot be too long, otherwise scrap too many, increase production cost.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is automatically controlled using extrusion equipment, is improved by the software section to controller, initial squeezing
In the stage, raw material aluminium bar longest, resistance when extruding is maximum, and extrusion speed is constantly being promoted, and squeeze pressure is needed to overcome resistance
Power simultaneously provides an acceleration for product, is controlled by segmentation microchannel aluminium flat conduit extruded velocity, and control precision is high, if
It is standby stable, make the stage squeeze pressure meet demand, flat tube reinforcing rib position feed sufficiently, is not easy to become reinforcing rib
Shape, eliminates the influence of human factor, and the stability of product is strong.
Detailed description of the invention
Fig. 1 is microchannel aluminium flat conduit end face.
Fig. 2 is to manually control the microchannel aluminium flat conduit end face squeezed out in embodiment one.
Fig. 3 is the microchannel aluminium flat conduit end face that equipment automatic-extrusion is used in embodiment one.
Fig. 4 is to manually control the microchannel aluminium flat conduit end face squeezed out in embodiment two.
Fig. 5 is the microchannel aluminium flat conduit end face that equipment automatic-extrusion is used in embodiment two.
Specific embodiment
To keep the purpose of the present invention and technical solution clearer, below in conjunction with the embodiment of the present invention to skill of the invention
Art scheme is clearly and completely described.
Embodiment one:
Yangzhou Rui Sile composite material Co., Ltd is the enterprise of a production microchannel aluminium flat conduit.The a certain type of company
Number flat tube has certain probability that the deformation of flat tube reinforcing rib occurs, such as schemes as shown in Figure 1, manually controlling fashion of extrusion using existing
(Fig. 2 is the microchannel aluminium flat conduit Cross Section Morphology figure using image measurer shooting) shown in 2, leads to flat tube size and burst pressure
It is undesirable.
It is squeezed using using method of controlling extrusion of the present invention:
1) stabilized speed V1 is set as 0.33m/s (20m/min).
2) the model flat tube rice weight is 75.3g/m, belongs to the bigger model of rice weight, the first acceleration A 1 is in setting range
Inside take smaller value 0.02m/s2。
3) duration T is set as 10s.
4) the second acceleration A 2 takes smaller value 0.03m/s within the set range2。
5) maximum speed Vmax takes smaller value 0.83m/s (50m/min) within the set range.
After the completion of setting, extrusion equipment produces the model flat tube according to setting program automatically, and flat tube does not occur in production and adds
The case where strengthening tendons are severely deformed, and flat tube size and burst pressure meet the requirements, as shown in figure 3, Fig. 3 is clapped using image measurer
The microchannel aluminium flat conduit Cross Section Morphology figure taken the photograph.
Embodiment two:
The a certain model flat tube of company, Rib Thickness requires 0.16 ± 0.04mm, because of the model flat tube Rib Thickness
It is too small, fashion of extrusion is manually controlled using existing, flat tube reinforcing rib deforms and even cracks, and leads to flat tube size and explosion
Pressure is undesirable, as shown in figure 4, Fig. 4 is the microchannel aluminium flat conduit Cross Section Morphology figure using image measurer shooting.
It is squeezed using using method of controlling extrusion of the present invention:
1) stabilized speed V1 is set as 0.33m/s (20m/min).
2) the model flat tube rice weight is 31.7g/m, belongs to the medium model of rice weight, the first acceleration A 1 is within the set range
Take median 0.04m/s2。
3) duration T is set as 10s.
4) the second acceleration A 2 of setting takes median 0.05m/s within the set range2。
5) maximum speed Vmax takes median 1m/s (60m/min) within the set range.
After the completion of setting, extrusion equipment produces the model flat tube according to setting program automatically, and flat tube does not occur in production and adds
The case where strengthening tendons are severely deformed or even crack, and flat tube size and burst pressure meet the requirements, as shown in figure 5, Fig. 5 is using image
The microchannel aluminium flat conduit Cross Section Morphology figure of measuring instrument shooting.
Embodiment three:
The a certain model flat tube of company manually controls fashion of extrusion, flat tube size and burst pressure stability using existing
It is medium, it can satisfy requirement substantially.
It is squeezed using using method of controlling extrusion of the present invention:
1) stabilized speed V1 is set as 0.33m/s (20m/min).
2) the model flat tube rice weight is 26.3g/m, belongs to the lesser model of rice weight, the first acceleration A 1 is within the set range
Take the larger value 0.05m/s2。
3) duration T is set as 10s.
4) the second acceleration A 2 takes the larger value 0.08m/s within the set range2.
5) maximum speed Vmax takes the larger value 1.33m/s (80m/min) within the set range
After the completion of setting, extrusion equipment produces the model flat tube, flat tube size and burst pressure according to setting program automatically
It has good stability, produces and the vocational skills of worker are required to reduce, the labor intensity of worker also has and reduces to a certain degree.
Do not done in the present invention illustrate be the prior art or can be realized by the prior art, and the present invention
Described in specific implementation case be only preferable case study on implementation of the invention, practical range not for the purpose of limiting the invention.
Equivalent changes and modifications made by i.e. all contents according to scope of the present invention patent all should be used as technology scope of the invention.
Claims (6)
1. a kind of control method of the extruded velocity of microchannel aluminium flat conduit, which comprises the steps of:
1), raw material aluminium bar is squeezed using extrusion equipment, produces microchannel aluminium flat conduit；After extruding starts, microchannel aluminium
Flat tube extruded velocity is increased since 0 with the even acceleration of the first acceleration A 1, and extrusion equipment real-time monitoring microchannel aluminium flat conduit squeezes out
Speed；
2) when, monitoring that microchannel aluminium flat conduit extruded velocity reaches stabilized speed V1, extrusion equipment control microchannel aluminium flat conduit with
Stabilized speed V1 is at the uniform velocity squeezed out, with duration that stabilized speed V1 is at the uniform velocity squeezed out for T；
3), extrusion equipment is controlled microchannel aluminium flat conduit extruded velocity and is increased since V1 with the even acceleration of the second acceleration A 2, until micro-
Channel aluminium flat conduit extruded velocity reaches maximum speed Vmax, is then at the uniform velocity squeezed out with maximum speed Vmax, until raw material aluminium bar squeezes
Pressure terminates；
First acceleration A 1, the unit of the second acceleration A 2 are m/s2, the unit of V1, Vmax are m/s, the list of duration T
Position is s.
2. the control method of the extruded velocity of microchannel aluminium flat conduit according to claim 1, which is characterized in that extruding starts
Before, it is by input terminal that the first acceleration A 1, the second acceleration A 2, stabilized speed V1, maximum speed Vmax and duration T is each
Parameter value inputs to the controller of extrusion equipment.
3. the control method of the extruded velocity of microchannel aluminium flat conduit according to claim 2, which is characterized in that the stabilization
Speed V1 is less than microchannel aluminium flat conduit spray zinc and starts speed；Spraying zinc starting speed is 0.5m/s, and the range of stabilized speed V1 is
0.33-0.42m/s。
4. the control method of the extruded velocity of microchannel aluminium flat conduit according to claim 3, which is characterized in that described first
The range of acceleration A 1 is 0.02-0.05m/s2, the range of the second acceleration A 2 is 0.02-0.08m/s2, and microchannel aluminium flat conduit
Meter Chong Yue it is big, the first acceleration A 1,2 value of the second acceleration A are smaller.
5. the control method of the extruded velocity of microchannel aluminium flat conduit according to claim 4, which is characterized in that the maximum
The range of speed Vmax is 0.75-1.67m/s.
6. the control method of the extruded velocity of microchannel aluminium flat conduit according to claim 5, which is characterized in that described lasting
The range of time T is 5-15s, and it is related that zinc length value is not sprayed in duration T and the process stipulation of microchannel aluminium flat conduit end, makes micro- lead to
Actually not spraying new length≤process stipulation does not spray zinc length for road aluminium flat conduit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743109.2A CN108941234A (en) | 2018-07-06 | 2018-07-06 | A kind of control method of the extruded velocity of microchannel aluminium flat conduit |
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| CN201810743109.2A CN108941234A (en) | 2018-07-06 | 2018-07-06 | A kind of control method of the extruded velocity of microchannel aluminium flat conduit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109977610A (en) * | 2019-04-16 | 2019-07-05 | 扬州瑞斯乐复合金属材料有限公司 | A kind of judgment method of microchannel aluminium flat conduit necking recess |
| CN111014330A (en) * | 2019-12-17 | 2020-04-17 | 扬州瑞斯乐复合金属材料有限公司 | Production method of micro-channel aluminum flat tube |
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| CN107008764A (en) * | 2016-01-28 | 2017-08-04 | 湖南恒佳铝业有限公司 | Air conditioning for automobiles and the cooling microchannel aluminium flat conduit continuous extruding technology of domestic air conditioning |
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| DE3307415A1 (en) * | 1983-03-02 | 1984-09-06 | Mannesmann Rexroth GmbH, 8770 Lohr | Arrangement for controlling the tensile force of an extruded bar emerging from an extrusion press and passed through a calibrating device |
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| CN111014330A (en) * | 2019-12-17 | 2020-04-17 | 扬州瑞斯乐复合金属材料有限公司 | Production method of micro-channel aluminum flat tube |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181207 |
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