CN100503067C - Squeezing needle circulating wind heater - Google Patents
Squeezing needle circulating wind heater Download PDFInfo
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- CN100503067C CN100503067C CNB2007101298499A CN200710129849A CN100503067C CN 100503067 C CN100503067 C CN 100503067C CN B2007101298499 A CNB2007101298499 A CN B2007101298499A CN 200710129849 A CN200710129849 A CN 200710129849A CN 100503067 C CN100503067 C CN 100503067C
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- heater
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- circulating wind
- squeezing needle
- temperature
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Abstract
The present invention discloses one kind of circulating air extruded-needle heater, which is one cylindrical heater with a casing, a heat insulating layer inside the casing, an axial through hole for inserting the extruded needle communicated to the inside heating chamber and an air inlet in the tangent direction of the inside heating chamber. The heater has the features of fast heating speed, homogeneous heating and capacity of raising produce efficiency.
Description
Technical field
The present invention relates to a kind of heater of producing the extruding pin of tubing, can shorten and produce tubing large needle time of staying temperature, enhance productivity.
Background technology
The non-cutting time of tubing production be in all products non-cutting time the longest, it is extruding pin time of staying temperature that tubing is produced 90% of non-cutting time.
12500 tons of hydraulic press φ 650 recipients are joined three kinds of specification extruding pins, 500 of φ and are joined a kind of specification extruding pin.The extruding gauge is big: long 2825mm, diameter phi 250, φ 300, φ 360,1.1～2.0 tons of Heavy Weights.Heating up behind the machine on the present extruding pin is the extruding pin to be put in lean on a tube radiation heating in the tube, and this radiation heating mode heat time heating time and speed are wayward, and temperature homogeneity is wayward.So the heating-up time is long, general 4～6 classes, if time of staying temperature can cause vexed car inadequately or the broken needle accident occur, so tubing production just restricts the production efficiency of 12500 tons of hydraulic presses always.
Though utilize flame direct baking heat temperature raising rapid, this mode of heating extruding pin is heated inhomogeneous, the easy hot-spot of extruding pin, thereby do not have practical value.
Summary of the invention
Purpose of the present invention just is to provide a kind of extruding pin heater, this heater homogeneous heating and easy control of temperature, thereby can shorten extruding pin time of staying temperature, improve to rise and produce efficient.
The present invention adopts following technical scheme: a kind of squeezing needle circulating wind heater, comprise a cylindric heater, cylindric heater is made of the heat-insulation layer in shell body and the shell body, place, cylindric heater two end cap axle center has the through hole of inserting the extruding pin to communicate with the inner heating clamber of cylindric heater, be provided with the air inlet that advances hot blast to heating clamber at cylindric heater barrel, the air intake direction of air inlet is the tangential direction of heating clamber in the described cylindric heater.
At described air inlet place a burner can be installed, the air intake of described burner is connected with blower fan, and fuel inlet connects coal gas or fuel-supply pipes such as natural gas, fuel oil.
This extruding pin heater, reasonable in design, adopt the tangential direction air intake, hot-air rotates to make in the whole heating clamber in heater does not have the dead angle, and temperature is even, guarantees extruding pin thermally equivalent, adopt the hot blast heating-up temperature to control easily, thereby have the characteristics of quick heating, and extruding pin time of staying temperature can be reduced to about 4 hours by original 32～48 hours, and intensification efficient has improved about 9 times.Production efficiency has brought up to 96%～98% by original 60%～70%.
Description of drawings
Fig. 1 is the partial cutaway structural representation of squeezing needle circulating wind heater of the present invention.
Fig. 2 is the partial cutaway schematic diagram of the right view of squeezing needle circulating wind heater shown in Figure 1.
Fig. 3 is extruding pin programming rate curve.
Fig. 4 A is a LF21R tube surfaces high power photo;
Fig. 4 B is a 2A12T4 tube surfaces high power photo;
Fig. 5 A is a LF21R tubing macrograph end to end;
Fig. 5 B is a 2A12T4 tubing macrograph end to end.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2, it is a kind of squeezing needle circulating wind heater, comprise a rack-mount cylindric heater, heater is made of the heat-insulation layer in metal shell body 1 and the shell body 2, place, cylindric heater two end cap axle center has the through hole 11 of inserting the extruding pin to communicate with inner heating clamber 9, be provided with the air inlet 8 that advances hot blast to heating clamber 9 at the heater barrel, the air intake direction of air inlet 8 is the tangential direction of circle heating clamber 9 in the heater, form the tangent line air intake like this, the hot blast that air inlet is blown into forms circulating current in heating clamber, temperature is even everywhere to make heating clamber, so that the extruding pin that inserts in the heating clamber is evenly heated.
For ease of temperature element is installed, the thermometer hole 10 of temperature elements such as thermal resistance or thermocouple are installed is arranged on the tube wall of heater middle part.
Heat-insulation layer 2 used insulation materials can adopt asbestos, good heat insulation and high temperature resistant.
Hot blast can be from other firing equipment.Adopt among the present invention at burner 6 of air inlet 8 places installation, utilize fuel combustion directly to produce hot blast at the air inlet place as thermal source, the air intake 7 of burner 6 is connected with blower fan 12 to feed compressed air, fuel inlet 5 connection coal gas or natural gas, fuel pipe.Utilize fuel in burner 6, to mix the combustion chambers burn that is incorporated in burner and produce high-temperature hot-air, directly be blown in the heating clamber of heater with compressed air.This mode compact conformation, the hot-air that produces directly enters heating clamber, can obtain higher temperature, and heats up rapidly, and can control the fuel straying quatity easily to control the heating clamber temperature neatly by control valve and temperature controller, this temperature control system is fairly simple.
Whole heater can be installed on the frame 4, and blower fan 12 and temperature conditioning unit 3 are installed in the frame.Make a whole set of heater conveniently moving like this.
The effect of this squeezing needle circulating wind heater is described with an experimental example below.
1, equipment and materials situation
Used extruding pin situation: φ 250 extruding pins estimate to produce the tubing specification: LF21R φ 300 * 55 and 2A12 φ 170 * 20.
Squeezing needle circulating wind heater parameter: external diameter 1382mm, long 1300mm.
2, the extruding pin adds thermal control
The heating process parameter sees Table 1
Table 1 extruding pin heating process parameter
| Specification | 450 ℃ of |
500 ℃ of constant temperatures | Gas pressure | The gas pressure flow | Extruding pin temperature range |
| φ 250 | 2 |
1 hour | 5000～6000Pa | 15M
3/ |
400～430 |
| φ | |||||
| 300 | 2 hours | 1.5 hour | 5000～7000Pa | 15M
3/ |
400～440℃ |
| φ 360 | 2 hours | 2 hours | 6000～8000Pa | 15M
3/ |
400～450℃ |
Extruding pin programming rate curve map 3.
3, tubing production
The heating of extruding pin is after 180 minutes, and heater is removed, and produces LF21R φ 300 * 55,2A12 φ 170 * 20 tubing.
LF21R manages first material process condition: 480 ℃ of ingot temperature, 450 ℃ of tube temperature, 7800 tons of extruding forces, extrusion speed 1.1m/min.
First material process condition of 2A12: 440 ℃ of ingot temperature, 450 ℃ of tube temperature, 11000 tons of extruding forces, extrusion speed 0.4m/min.
4, tubing check
The tubing that squeezes out carries out physical and chemical inspection: low power is not seen defective; Mirco structure is burning not; Performance indications see Table 2;
LF21R tube surfaces high power photo is shown in Fig. 4 A, and 2A12T4 tube surfaces high power photo is shown in Fig. 4 B; LF21R end to end macrograph shown in Fig. 5 A, 2A12T4 end to end macrograph shown in Fig. 5 B.
Table 2 pipe performance index
| Specification | Alloy state | ∑b(MPa) | σ0.2(MPa) | δ |
| φ300×55 | LF21R | 132 | 75 | 35 |
| φ300×55 | LF21R | 132 | 76 | 34.5 |
| φ170×20 | 2A12T4 | 525 | 405 | 15.5 |
By table 2 and Fig. 4, Fig. 5 as can be seen, the tubing of Jia Re extruding pin production satisfies the requirement of tubing delivery standard GB/T4437.1-2000 in this way.
5, conclusion
Extruding pin heater is after test and using, and respond well, time of staying temperature was reduced to about 4 hours by original 32～40 hours, and intensification efficient has improved 9 times.Production efficiency has brought up to 96%～98% by original 60%～70%.
After adding the hot extrusion pin and produce tubing with heater, because there is not temperature problem on the low side in the extruding pin, thereby first material is not easy to take place vexed car, avoided the extruding pin because of vexed car is out of shape, and causes unloading to get off or pushes pin and scrap, and improved production efficiency.
Because of having shortened extruding pin time of staying temperature, the conversion that solid material and hollow material are produced can be more frequent, increased the flexibility of scheduling of production, improved the efficient of whole year production.The easier adaptation of our factory market and the needs that satisfy defence and military have strengthened the ability that forge plant is survived.
Claims (5)
1, a kind of squeezing needle circulating wind heater, it is characterized in that: comprise a cylindric heater, cylindric heater is made of the heat-insulation layer in shell body and the shell body, place, cylindric heater two end cap axle center has the through hole of inserting the extruding pin to communicate with the inner heating clamber of cylindric heater, be provided with the air inlet that advances hot blast to heating clamber at cylindric heater barrel, the air intake direction of air inlet is the tangential direction of heating clamber in the described cylindric heater.
2, squeezing needle circulating wind heater as claimed in claim 1 is characterized in that: at described air inlet place a burner is installed, the air intake of described burner is connected with blower fan, and fuel inlet connects fuel-supply pipe.
3, squeezing needle circulating wind heater as claimed in claim 2 is characterized in that: described cylindric heater is installed on the frame, and temperature conditioning unit and described blower fan are installed in the frame.
4, as described squeezing needle circulating wind heater one of in the claim 1 to 3, it is characterized in that: on the tube wall at described cylindric heater middle part, have thermometer hole to be used to install temperature element.
5, as described squeezing needle circulating wind heater one of in the claim 1 to 3, it is characterized in that: described heat-insulation layer is asbestos.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101298499A CN100503067C (en) | 2007-07-27 | 2007-07-27 | Squeezing needle circulating wind heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101298499A CN100503067C (en) | 2007-07-27 | 2007-07-27 | Squeezing needle circulating wind heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101077509A CN101077509A (en) | 2007-11-28 |
| CN100503067C true CN100503067C (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101298499A Active CN100503067C (en) | 2007-07-27 | 2007-07-27 | Squeezing needle circulating wind heater |
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| Country | Link |
|---|---|
| CN (1) | CN100503067C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680846A (en) * | 2021-08-24 | 2021-11-23 | 中南大学 | Integral forming device and method for wall plate with ribs |
| CN114309113A (en) * | 2021-12-09 | 2022-04-12 | 山东兖矿轻合金有限公司 | Extrusion needle for aluminum alloy seamless tube extruder and online heating method thereof |
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2007
- 2007-07-27 CN CNB2007101298499A patent/CN100503067C/en active Active
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| Publication number | Publication date |
|---|---|
| CN101077509A (en) | 2007-11-28 |
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