CN120212469A - A street lamp die-casting and intelligent die-casting production method thereof - Google Patents
A street lamp die-casting and intelligent die-casting production method thereof Download PDFInfo
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- CN120212469A CN120212469A CN202510556084.5A CN202510556084A CN120212469A CN 120212469 A CN120212469 A CN 120212469A CN 202510556084 A CN202510556084 A CN 202510556084A CN 120212469 A CN120212469 A CN 120212469A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/56—Cooling arrangements using liquid coolants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/56—Cooling arrangements using liquid coolants
- F21V29/57—Cooling arrangements using liquid coolants characterised by control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
本发明公开了一种路灯压铸件及其智能压铸生产方法，涉及路灯生产技术领域，包括灯壳主体，所述灯壳主体呈顶面封闭、底端开口结构，所述灯壳主体内部具有安装灯具的第一安装腔以及用于安装电器元件的第二安装腔，在所述灯壳主体侧壁上设置有用于与灯杆连接的安装部，在灯壳主体顶面设置有多个向外突出的散热鳍片，所述灯壳主体、第一安装腔、第二安装腔、安装部和散热鳍片一体压铸而成。本发明针对散热鳍片易过度冷却的问题，设计了专门的冷却通道和滑塞控制结构，结合温感调节组件，能根据压铸不同阶段散热鳍片区域的实际冷却需求，灵活调整冷却策略，有效改善散热鳍片因整体冷却导致的过度冷却问题，显著提高铸件质量。
The present invention discloses a street lamp die-casting and an intelligent die-casting production method thereof, which relates to the technical field of street lamp production, including a lamp housing body, wherein the lamp housing body is a structure with a closed top surface and an open bottom end, wherein the interior of the lamp housing body has a first mounting cavity for mounting a lamp and a second mounting cavity for mounting an electrical component, wherein a mounting portion for connecting to a lamp pole is provided on the side wall of the lamp housing body, and a plurality of heat dissipation fins protruding outward are provided on the top surface of the lamp housing body, wherein the lamp housing body, the first mounting cavity, the second mounting cavity, the mounting portion and the heat dissipation fins are integrally die-cast. Aiming at the problem that the heat dissipation fins are prone to overcooling, the present invention designs a special cooling channel and a sliding plug control structure, and combines with a temperature sensing adjustment component, so as to flexibly adjust the cooling strategy according to the actual cooling requirements of the heat dissipation fin area at different stages of die-casting, effectively improve the overcooling problem of the heat dissipation fins caused by overall cooling, and significantly improve the quality of the casting.
Description
Technical Field
The invention relates to the technical field of street lamp production, in particular to a street lamp die casting and an intelligent die casting production method thereof.
Background
In modern urban lighting systems, street lamps play a vital role. The lamp housing of the street lamp is used as a key component for protecting an internal light source, an electric element and realizing a good heat dissipation function, and the quality and the performance of the lamp housing directly influence the whole service life and the lighting effect of the street lamp. The die casting process is widely applied to the production of street lamp shells by virtue of the advantages of high efficiency, high precision and capability of manufacturing parts with complex shapes.
At present, a common lamp housing die-casting die generally adopts an integral cooling mode. Although this cooling strategy can achieve solidification of the casting to some extent, it has significant limitations. Taking a common heat dissipation fin on a street lamp housing as an example, the heat dissipation fin is generally integrally formed on the lamp housing, and the structure of the heat dissipation fin is lighter and thinner than other parts of the lamp housing. In the whole cooling process, the heat dissipation speed is far faster than that of the lamp shell main body part due to the large surface area and volume of the radiating fins, so that the radiating fins are easy to be excessively cooled.
Excessive cooling has a number of negative effects on lamp envelope quality. On the one hand, in the foundry goods inside, excessive cooling promotes the molten metal of radiator fin department to solidify fast, fuses poorly with the molten metal of follow-up filling, and then produces cold shut defect, and the cold shut not only seriously influences the appearance quality of lamp body, still can form stress concentration point at cold shut position, reduces the structural strength of lamp body, receives the external force effect such as blow, vibrations in the street lamp use, and cold shut department extremely probably initiates crack extension, finally leads to the lamp body to break, seriously influences the security and the life of street lamp. On the other hand, the excessive cooling causes abnormal change of the metal structure of the radiating fin area, the grain refinement is uneven, and segregation phenomenon is generated, so that the mechanical property of the material is reduced, the corrosion resistance of the area is obviously reduced, the radiating fin is more easily corroded by rainwater, salt and the like in an outdoor complex environment, and the overall service life of the lamp housing is shortened.
In view of this, the present application has been made.
Disclosure of Invention
The invention aims to provide a street lamp die casting and an intelligent die casting production method thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the street lamp die casting comprises a lamp housing main body, wherein the lamp housing main body is of a structure with a closed top surface and an open bottom end, a first mounting cavity for mounting a lamp and a second mounting cavity for mounting an electric element are formed in the lamp housing main body, a mounting part for connecting with a lamp post is arranged on the side wall of the lamp housing main body, a plurality of radiating fins protruding outwards are arranged on the top surface of the lamp housing main body, and the lamp housing main body, the first mounting cavity, the second mounting cavity, the mounting part and the radiating fins are integrally die-cast.
Further, the lamp body is made of an aluminum alloy material, wherein the aluminum alloy contains 90% of aluminum element, 4% of magnesium and 6% of silicon, so that the strength and the heat dissipation performance of the material are enhanced;
The height of the radiating fin is the height of the side wall of the lamp housing main body And the spacing between the adjacent radiating fins is 5mm-10mm;
The depth of the first installation cavity is 3mm-5mm, and the depth of the second installation cavity is 5mm-8mm.
An intelligent die casting production method comprises the following steps:
s1, mounting a designed die-casting die to a die-casting machine, and preheating the die to 180-220 ℃;
S2, heating the aluminum alloy raw material to 680-720 ℃ to enable the aluminum alloy raw material to be completely melted, and carrying out degassing and refining treatment to remove impurities and bubbles;
S3, injecting the melted aluminum alloy raw material into a pressing chamber of a die casting machine through a feeding device, starting the die casting machine, and pressing the aluminum alloy liquid into a die cavity at a high speed under the pressure of 50-80MPa, wherein the pressure maintaining time is 3-5S;
S4, in the die casting process, temperature and pressure data are collected in real time through temperature sensors and pressure sensors arranged at the die cavity, the pressing chamber and the key part of the die casting machine and are transmitted to a control system, and when the temperature or pressure data deviate from a preset range, the control system automatically adjusts the heating power, the injection speed and the pressure of the die casting machine, so that the stability of the die casting process is ensured;
S5, after die casting is completed, injecting cooling liquid into a cooling runner of the die through a liquid pump to cool the die to 80-120 ℃, starting a demoulding device, and ejecting the formed street lamp die casting out of the die through a thimble;
S6, a post-treatment step, namely deburring and polishing the die casting of the demoulded street lamp, detecting air tightness and appearance quality, and packaging and warehousing qualified products.
Further, the temperature sensor is a K-type thermocouple and is respectively arranged at the top, the bottom and the side wall of the die cavity, and a feed inlet and a discharge outlet of the pressing chamber;
the pressure sensor adopts a strain gauge type pressure sensor and is arranged on a shot cylinder and a pressure maintaining cylinder of the die casting machine;
When the temperature data deviate from the preset range plus or minus 5 ℃, the amplitude of the heating power is adjusted to be 5-10kW, when the pressure data deviate from the preset range plus or minus 3MPa, the amplitude of the injection speed is adjusted to be 0.1-0.3m/s, and the amplitude of the pressure is adjusted to be 2-5MPa;
In the step S6, deburring adopts a vibration grinding mode, the grinding time is 10-15min, and the grinding medium is alumina particles;
in the step S6, a helium leak detector is adopted for the air tightness detection, the detection pressure is 0.5-0.8MPa, the dwell time is 2-3min, and the leak rate is not more than 5 multiplied by 10 < -6 > Pa m < 3 >/S, which is regarded as qualified.
Further, in step S1, the die casting die includes the last mould and the lower mould of mutually supporting, go up the mould be equipped with lamp body main part bottom opening shape adaptation ' S protruding structure, the lower mould is equipped with lamp body main part top and the recess structure that cooling fin shape corresponds, upward be provided with on the mould and be used for to the inside injection port of injection aluminum alloy liquid of recess structure, upward all be provided with around protruding structure and recess structure setting ' S main cooling channel with the inside of lower mould, upward all be provided with on mould and the lower mould and communicate main cooling channel ' S notes liquid mouth and first liquid outlet.
Further, be located on the lower mould be connected with the main drain pipe on the first liquid outlet, the inside of lower mould is provided with the vice cooling channel of heat radiation fin position department in surrounding groove structure, still be provided with the second liquid outlet on the lower mould, second liquid outlet one end and vice cooling channel intercommunication, the other end is connected with the vice drain pipe, be connected with first shunt tube and second shunt tube on the lateral wall of main drain pipe, main drain pipe one end and vice cooling channel intercommunication are kept away from to first shunt tube, main drain pipe one end and vice drain pipe intercommunication are kept away from to the second shunt tube, the inside slidable mounting of main drain pipe has the slipplug, the runner has been seted up on the slipplug, runner and first shunt tube intercommunication when the slipplug down slides to the second position, the first shunt tube of slipplug outer wall shutoff, just runner and second shunt tube intercommunication, be provided with on the outer wall of lower mould and be used for adjusting the vertical slip of slipplug in order to open the sense adjustment subassembly of first shunt tube and second shunt tube.
Further, the temperature-sensing adjusting component comprises a rotating wheel rotatably arranged on the side wall of the lower die, a connecting rod is rotatably arranged on the outer end face of the rotating wheel, a sliding rod is slidably arranged on the bottom wall of the main liquid outlet pipe, and one end, far away from the rotating wheel, of the connecting rod is hinged with the sliding rod.
Further, the temperature-sensing adjusting component further comprises a first gear coaxially installed with the rotating wheel and a long rack arranged on the front end face of the lower die in a sliding mode, the long rack is connected with the first gear in a meshed mode, an installation shell is installed on the outer wall of the auxiliary liquid outlet pipe, a second gear meshed with the long rack is installed in the installation shell in a rotating mode, a third gear is coaxially installed on the second gear, an extension pipe radially extending along the side wall of the auxiliary liquid outlet pipe is arranged on the side wall of the auxiliary liquid outlet pipe, a shape memory metal sheet is installed in the extension pipe, and a short rack is connected to the shape memory metal sheet in a meshed mode.
Further, a sliding opening is formed in the side wall of the mounting shell, and the long rack is connected inside the sliding opening in a sliding mode.
Further, the first shunt tube is located on the side wall of the upper portion of the main liquid outlet tube, the second shunt tube is located on the side wall of the lower portion of the main liquid outlet tube, and the first shunt tube is located above the second shunt tube.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, a radiating mode of utilizing a main cooling channel to reflux cooling liquid is innovatively designed aiming at the problem that the radiating fins are easy to excessively cool, and the cooling liquid with a certain temperature after heat exchange in the main cooling channel is conveyed to an auxiliary cooling channel arranged around the radiating fins. The cooling strategies with different temperature differences have multiple advantages, in the initial stage of die casting, the heat radiating fins are in contact with high-temperature metal liquid, the heat radiating requirement is high, at the moment, the relatively low-temperature main cooling channel flows back to the cooling liquid to enter the auxiliary cooling channel, a large amount of heat can be rapidly taken away, the heating speed of the heat radiating fins is effectively restrained, the whole temperature of the die is gradually reduced along with the advancing of the die casting process, the temperature of the heat radiating fins is gradually reduced, the cooling liquid with a certain temperature continuously flows in at the moment, the quality defect of the heat radiating fins caused by excessive cooling is avoided, and compared with the traditional single-temperature cooling medium, the staged and self-adaptive cooling mode can more accurately match the heat radiating requirement of the heat radiating fins in different die casting stages, optimize the heat radiating effect, remarkably improve the casting quality, flexibly adjust the flow and the flow direction of the cooling liquid according to the actual temperature condition, and further ensure the adaptability of a cooling system and the optimization of the cooling effect of the area of the heat radiating fins.
2. According to the invention, a special cooling channel and a sliding plug control structure are designed aiming at the problem that the radiating fins are easy to be excessively cooled, and the cooling strategy can be flexibly adjusted according to the actual cooling requirements of the radiating fin areas in different stages of die casting by combining the temperature-sensing adjusting assembly, so that the excessive cooling problem of the radiating fins caused by integral cooling is effectively improved, the casting quality is obviously improved, the temperature-sensing adjusting assembly which is simple in structure and reliable in operation is also provided, and the reasonable distribution pipe position layout is further ensured, so that the adaptability of a cooling system and the optimization of the cooling effect of the radiating fin areas are further ensured.
Drawings
FIG. 1 is a schematic top view of a street lamp die casting according to the present invention;
FIG. 2 is a schematic view of the bottom view of the street lamp die casting of the present invention;
FIG. 3 is a schematic view of a die casting die according to the present invention;
FIG. 4 is a schematic cross-sectional view of a die casting die according to the present invention;
FIG. 5 is a schematic diagram showing the front view of the die casting die of the present invention;
FIG. 6 is a schematic cross-sectional view taken along section line A-A of FIG. 5;
FIG. 7 is a schematic elevational view of a temperature sensing and adjusting assembly in a die casting mold;
FIG. 8 is a schematic diagram of a rear view of a temperature sensing adjustment assembly in a die casting mold;
fig. 9 is a schematic cross-sectional view of a main drain pipe according to the present invention.
In the figure, 1, a lamp housing main body; 2, a first installation cavity, 3, a second installation cavity, 4, an installation part, 5, a heat radiation fin, 6, an upper die, 7, a lower die, 8, a material injection port, 9, a convex structure, 10, a groove structure, 11, a main cooling channel, 12, a secondary cooling channel, 13, a second liquid outlet, 14, a liquid injection port, 15, a first liquid outlet, 16, a main liquid outlet pipe, 17, a first shunt pipe, 18, a second shunt pipe, 19, a secondary liquid outlet pipe, 20, a rotating wheel, 21, a connecting rod, 22, a sliding rod, 23, a first gear, 24, a long rack, 25, an installation shell, 26, a sliding plug, 27, a second gear, 28, a third gear, 29, an extension pipe, 30, a shape memory metal sheet, 31, a short rack, 32 and a runner.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-9, the invention provides a technical scheme that a street lamp die casting comprises a lamp housing main body 1, wherein the lamp housing main body 1 is of a structure with a closed top surface and an open bottom end, a first mounting cavity 2 for mounting a lamp and a second mounting cavity 3 for mounting an electric element are arranged in the lamp housing main body 1, a mounting part 4 for connecting with a lamp post is arranged on the side wall of the lamp housing main body 1, a plurality of radiating fins 5 protruding outwards are arranged on the top surface of the lamp housing main body 1, and the lamp housing main body 1, the first mounting cavity 2, the second mounting cavity 3, the mounting part 4 and the radiating fins 5 are integrally die-cast.
Specifically, the special aluminum alloy material ensures that the lamp housing has good strength to resist external force, excellent heat dissipation performance prolongs the service life of internal elements, reasonable heat dissipation fin 5 size optimizes heat dissipation effect, and accurate installation cavity depth is convenient for the installation of lamps and lanterns and electric elements, and improves assembly precision.
The lamp body main body 1 is made of an aluminum alloy material, wherein the aluminum alloy contains 90% of aluminum element, 4% of magnesium and 6% of silicon, so that the strength and the heat dissipation performance of the material are enhanced;
The height of the radiating fins 5 is the height of the side wall of the lamp housing main body 1 And the spacing between the adjacent heat radiation fins 5 is 5mm-10mm;
The depth of the first installation cavity 2 is 3mm-5mm, and the depth of the second installation cavity 3 is 5mm-8mm.
Specifically, the present invention relates to a method for manufacturing a semiconductor device.
An intelligent die casting production method comprises the following steps:
s1, mounting a designed die-casting die to a die-casting machine, and preheating the die to 180-220 ℃;
S2, heating the aluminum alloy raw material to 680-720 ℃ to enable the aluminum alloy raw material to be completely melted, and carrying out degassing and refining treatment to remove impurities and bubbles;
S3, injecting the melted aluminum alloy raw material into a pressing chamber of a die casting machine through a feeding device, starting the die casting machine, and pressing the aluminum alloy liquid into a die cavity at a high speed under the pressure of 50-80MPa, wherein the pressure maintaining time is 3-5S;
S4, in the die casting process, temperature and pressure data are collected in real time through temperature sensors and pressure sensors arranged at the die cavity, the pressing chamber and the key part of the die casting machine and are transmitted to a control system, and when the temperature or pressure data deviate from a preset range, the control system automatically adjusts the heating power, the injection speed and the pressure of the die casting machine, so that the stability of the die casting process is ensured;
S5, after die casting is completed, injecting cooling liquid into a cooling runner of the die through a liquid pump to cool the die to 80-120 ℃, starting a demoulding device, and ejecting the formed street lamp die casting out of the die through a thimble;
S6, a post-treatment step, namely deburring and polishing the die casting of the demoulded street lamp, detecting air tightness and appearance quality, and packaging and warehousing qualified products.
Specifically, each step of the whole intelligent die-casting production method is tightly matched, the accurate control from the die and raw materials to the die-casting process is carried out, and then the intelligent monitoring adjustment, demoulding and post-treatment are carried out, so that the high-quality production of the street lamp die-casting is ensured, the rejection rate is reduced, the production efficiency is improved, and the product quality is stable and reliable.
The temperature sensor is a K-type thermocouple and is respectively arranged at the top, the bottom and the side wall of the die cavity, and a feed inlet and a discharge outlet of the pressing chamber;
The pressure sensor adopts a strain gauge type pressure sensor and is arranged on a shot cylinder and a pressure maintaining cylinder of the die casting machine;
When the temperature data deviate from the preset range plus or minus 5 ℃, the amplitude of the heating power is adjusted to be 5-10kW, when the pressure data deviate from the preset range plus or minus 3MPa, the amplitude of the injection speed is adjusted to be 0.1-0.3m/s, and the amplitude of the pressure is adjusted to be 2-5MPa;
In the step S6, deburring adopts a vibration grinding mode, the grinding time is 10-15min, and the grinding medium is alumina particles;
In the step S6, a helium leak detector is adopted for the air tightness detection, the detection pressure is 0.5-0.8MPa, the dwell time is 2-3min, and the leak rate is not more than 5 multiplied by 10 -6Pa·m3/S and is regarded as qualified.
Specifically, accurate sensor selection and mounting positions ensure that temperature and pressure data can be comprehensively and accurately acquired, reliable basis is provided for a control system, accurate adjustment of a die casting process is realized, and proper deburring and detection methods ensure the surface quality and air tightness of castings and improve the overall quality of products.
Referring to fig. 3 to 9, in step S1, the die casting mold includes an upper mold 6 and a lower mold 7 that are matched with each other, the upper mold 6 is provided with a protrusion structure 9 that is adapted to the shape of the opening at the bottom of the lamp body 1, the lower mold 7 is provided with a groove structure 10 corresponding to the shape of the top of the lamp body 1 and the heat sink 5, the upper mold 6 is provided with a material injection port 8 for injecting aluminum alloy liquid into the groove structure 10, the upper mold 6 and the lower mold 7 are both internally provided with a main cooling channel 11 that is disposed around the protrusion structure 9 and the groove structure 10, and the upper mold 6 and the lower mold 7 are both provided with a liquid injection port 14 and a first liquid outlet 15 that are communicated with the main cooling channel 11.
Specifically, the material injection port 8 of the upper die 6 is used for injecting aluminum alloy liquid, the upper die 6 and the lower die 7 are internally provided with a main cooling channel 11 around the bulge and the groove structure, cooling liquid circulation is realized through the liquid injection port 14 and the first liquid outlet 15, the whole die is preliminarily cooled, the die structure design is matched with the shape height of the lamp shell die casting, the accuracy of die casting molding is ensured, the main cooling channel 11 is arranged for preliminarily cooling the die, the casting is solidified and molded in a proper temperature environment, and the casting quality is improved.
Referring to fig. 3, fig. 4, fig. 5, fig. 6 and fig. 9, a main liquid outlet pipe 16 is connected to a first liquid outlet 15 on the lower die 7, a secondary cooling channel 12 surrounding the position of the heat dissipation fins 5 in the groove structure 10 is arranged in the lower die 7, a second liquid outlet 13 is further arranged on the lower die 7, one end of the second liquid outlet 13 is communicated with the secondary cooling channel 12, the other end of the second liquid outlet 13 is connected with a secondary liquid outlet pipe 19, a first shunt pipe 17 and a second shunt pipe 18 are connected to the side wall of the main liquid outlet pipe 16, one end of the first shunt pipe 17, which is far away from the main liquid outlet pipe 16, is communicated with the secondary cooling channel 12, one end of the second shunt pipe 18, which is far away from the main liquid outlet pipe 16, is communicated with the secondary liquid outlet pipe 19, a sliding plug 26 is slidably arranged in the main liquid outlet pipe 16, a runner 32 is arranged on the sliding plug 26, the runner 32 is communicated with the first shunt pipe 17 when the sliding plug 26 slides down to the second position, the first shunt pipe 17 is communicated with the second shunt pipe 18, and a first shunt pipe 18 is arranged on the outer wall of the lower die 7, and a plug assembly for adjusting the vertical sliding plug 26 to open the first shunt pipe 17 and the second shunt pipe 18.
Specifically, when the slide plug 26 slides down to the second position, the flow channel 32 is communicated with the second shunt pipe 18, and the cooling liquid flows to the auxiliary liquid outlet pipe 19, at the moment, the cooling key point can be adjusted according to the casting cooling condition, and the temperature-sensing adjusting component on the outer wall of the lower die 7 can adjust the slide plug 26 to slide according to the temperature change;
through the design of the cooling channel and the sliding plug 26, the targeted cooling of the area of the radiating fins 5 is realized, the radiating fins 5 are mainly cooled in the initial stage of die casting, the excessive cooling caused by the excessively fast heat dissipation is avoided, along with the promotion of the die casting process, the cooling strategy can be flexibly adjusted according to the actual temperature condition, the excessive cooling problem of the radiating fins 5 caused by the integral cooling is effectively improved, and the casting quality is improved.
Referring to fig. 3, 5, 7 and 8, the temperature sensing adjusting assembly comprises a rotary wheel 20 rotatably mounted on the side wall of the lower die 7, a connecting rod 21 is rotatably mounted on the outer end surface of the rotary wheel 20, a sliding rod 22 is slidably mounted on the bottom wall of the main liquid outlet pipe 16, and one end of the connecting rod 21, which is far away from the rotary wheel 20, is hinged with the sliding rod 22.
Specifically, when the rotating wheel 20 rotates, the connecting rod 21 drives the sliding rod 22 to slide, so that the sliding plug 26 is pushed to slide in the main liquid outlet pipe 16, the blocking or opening control of the first shunt pipe 17 and the second shunt pipe 18 is realized, the mechanically connected temperature-sensing adjusting component has a simple structure and reliable operation, the position of the sliding plug 26 can be flexibly controlled according to temperature change, the effective adjustment of the cooling mode of the area of the cooling fin 5 is realized, and the adaptability of a cooling system is improved.
Referring to fig. 3,5, 7 and 8, the temperature sensing adjusting assembly further comprises a first gear 23 coaxially installed with the rotary wheel 20 and a long toothed bar 24 slidably arranged on the front end surface of the lower die 7, the long toothed bar 24 is in meshed connection with the first gear 23, a mounting shell 25 is installed on the outer wall of the auxiliary liquid outlet pipe 19, a second gear 27 meshed with the long toothed bar 24 is rotatably installed inside the mounting shell 25, a third gear 28 is coaxially installed on the second gear 27, an extension pipe 29 extending along the radial direction of the second gear is arranged on the side wall of the auxiliary liquid outlet pipe 19, a shape memory metal sheet 30 is installed inside the extension pipe 29, a short toothed bar 31 is connected on the shape memory metal sheet 30, and the short toothed bar 31 is in meshed connection with the third gear 28.
Specifically, the shape memory metal sheet 30 in the side wall extension tube 29 of the auxiliary liquid outlet tube 19 deforms along with the temperature change, drives the connected short racks 31 to move, the short racks 31 are meshed with the third gear 28, when the temperature change occurs, the shape memory metal sheet 30 deforms, the rotating wheel 20 is driven to rotate through the transmission of the short racks 31, the third gear 28, the second gear 27, the long racks 24 and the first gear 23, and finally the position of the sliding plug 26 is adjusted, a set of cooling adjusting system capable of automatically responding to the temperature change is constructed by utilizing the characteristic that the shape memory metal sheet 30 is sensitive to the temperature, a cooling strategy can be automatically adjusted according to the temperature of the heat dissipation fin 5 in the die casting process without an additional complicated control system, and the intelligent degree and reliability of the cooling system are improved.
Referring to fig. 8, a sliding opening is formed in a side wall of the mounting case 25, and the long rack 24 is slidably coupled to the inside of the sliding opening.
Specifically, the long rack 24 is guided through the sliding port in the meshing transmission process with the first gear 23 and the second gear 27, so that the long rack 24 is ensured to stably move, and the transmission stability of the whole temperature-sensing adjusting assembly is further ensured;
the design of the sliding port provides a stable sliding track for the long rack 24, ensures the accuracy and reliability of transmission among all components of the temperature-sensing adjusting assembly, and avoids the influence on the adjusting precision of the position of the sliding plug 26 due to the problems of shaking of the long rack 24 and the like.
Referring to fig. 9, the first shunt tube 17 is located at the side wall of the upper portion of the main liquid outlet tube 16, the second shunt tube 18 is located at the side wall of the lower portion of the main liquid outlet tube 16, and the first shunt tube 17 is located above the second shunt tube 18.
Specifically, in the initial stage of die casting, the temperature of the die is higher, the heat dissipation requirement of the area of the heat dissipation fins 5 is high, and the cooling liquid flows into the auxiliary cooling channel 12 from the main liquid outlet pipe 16 through the first shunt pipe 17 preferentially to cool the heat dissipation fins 5, so that the temperature of the whole die is reduced, the temperature of the area of the heat dissipation fins 5 is relatively stable, the sliding plug 26 slides downwards, and the cooling liquid flows into the auxiliary liquid outlet pipe 19 through the second shunt pipe 18 to perform integral cooling fine adjustment on other parts or other parts;
The distribution pipe position layout design is combined with the sliding control of the sliding plug 26, so that the flow direction of the cooling liquid can be reasonably distributed according to the actual cooling requirements of the cooling fin 5 area in different stages of die casting, the cooling effect on the cooling fin 5 area is further optimized, and the casting quality is improved.
The lamp body 1 is constructed into a structure with a closed top surface and an open bottom end, a first mounting cavity 2 and a second mounting cavity 3 are accurately divided in the lamp body, the lamp body is respectively used for mounting a lamp and an electric element, the mounting positions of all components are ensured to be clear and do not interfere with each other, the mounting part 4 is arranged on the side wall of the lamp body 1 and is firmly connected with a lamp post, the integral mounting stability of the lamp is ensured, the radiating fins 5 protruding outwards are additionally arranged on the top surface of the lamp body 1, the radiating area is increased by utilizing the larger surface area of the radiating fins, the heat dissipation is promoted, and the lamp body 1, the first mounting cavity 2, the second mounting cavity 3, the mounting part 4 and the radiating fins 5 are formed into a tightly connected whole through an integral die-casting forming process, so that the connection strength and the tightness among all parts are ensured, the heat conduction path is optimized, and the radiating efficiency is improved;
Before die casting, the die casting die, namely an upper die 6 and a lower die 7 which are matched with each other, is accurately arranged on a die casting machine, the upper die 6 and the lower die 7 are preheated to enable the temperature to reach 180-220 ℃, the preheating operation can reduce the temperature difference between the aluminum alloy liquid which is injected subsequently and the die, reduce the flowing resistance of the aluminum alloy liquid in the process of filling a die cavity of the die, ensure that all parts of the die can be smoothly filled with the aluminum alloy liquid, improve the molding quality of castings, simultaneously, the aluminum alloy raw materials are heated to 680-720 ℃ to enable the aluminum alloy raw materials to be completely melted, and then the degassing and refining treatment are carried out, so that impurities and bubbles in the aluminum alloy liquid are removed through the treatment steps, the purity of the aluminum alloy liquid is improved, and a high-quality raw material basis is provided for producing high-quality die castings;
the method comprises the steps of accurately injecting molten and processed aluminum alloy raw materials into a pressure chamber of a die casting machine through feeding equipment, starting the die casting machine, and then pressing the aluminum alloy liquid into a die cavity at a high pressure of 50-80MPa, wherein after filling, the pressure maintaining time is kept for 3-5 seconds, in the process, the high pressure can enable the aluminum alloy liquid to tightly fill each detail of the die cavity, so that the dimensional accuracy and the surface quality of a casting are ensured, meanwhile, the pressure maintaining operation is beneficial to compacting the aluminum alloy liquid, defects such as shrinkage cavity and looseness in the casting are reduced, the compactness and the overall strength of the casting are improved, and K-type thermocouple temperature sensors are arranged at the top, the bottom and the side wall of the die cavity and at a feed inlet and a discharge outlet of the pressure chamber in the whole die casting process, and collect temperature data in real time;
After die casting, in order to enable the casting to be smoothly demolded and ensure the quality of the casting, a liquid pump is used for injecting cooling liquid into a main cooling channel 11 which is arranged in the die and surrounds a convex structure 9 and a groove structure 10, and a secondary cooling channel 12 which is arranged at the position of a lower die 7 surrounding a radiating fin 5, the cooling liquid circularly flows in the channels to absorb the heat of the die, so that the temperature of the die is reduced, when the die is cooled to 80-120 ℃, the casting is basically solidified and molded, a demolding device is started, a thimble is used for ejecting the molded street lamp die casting from the die, during the cooling process, the cooling liquid in the main cooling channel 11 exchanges heat with the whole die, the temperature is increased after absorbing a large amount of heat, then the cooling liquid with a certain temperature in the main cooling channel 11 is conveyed to the secondary cooling channel 12 after exchanging heat for radiating the radiating fin 5, and at the initial stage of die casting, the heat radiation fins 5 are contacted with high-temperature aluminum alloy liquid, the temperature rises sharply, at the moment, the relatively low-temperature main cooling channel 11 flows back to the cooling liquid to enter the auxiliary cooling channel 12, a large amount of heat can be taken away rapidly, the heating speed of the heat radiation fins 5 is effectively restrained, the quality problem caused by overhigh temperature is avoided, the whole temperature of the die gradually decreases along with the pushing of the die casting process, the temperature of the heat radiation fins 5 also decreases along with the gradual decrease, at the moment, the cooling liquid with a certain temperature continuously flows into the auxiliary cooling channel, a mild cooling environment is provided for the heat radiation fins 5, the quality defects such as cold insulation and cracks are avoided for the heat radiation fins 5 due to excessive cooling are avoided, the heat radiation requirements of the heat radiation fins 5 in the whole die casting process can be better met by utilizing different temperature cooling liquids to carry out staged and self-adaptive cooling modes according to different stages of die casting, the heat dissipation effect is optimized, and the casting quality is improved;
In order to further optimize the cooling effect on the cooling fins 5, a sliding plug 26 capable of sliding is arranged in the main liquid outlet pipe 16 of the lower die 7, a runner 32 is arranged on the sliding plug 26, in the initial position, the runner 32 is communicated with the first split pipe 17, the cooling liquid flowing back from the main cooling channel flows into the auxiliary cooling channel 12 preferentially through the first split pipe 17, the cooling fins 5 are subjected to key cooling, along with the change of the temperature of the die in the die casting process, a temperature-sensing adjusting assembly arranged on the outer wall of the lower die 7 starts to work, the temperature-sensing adjusting assembly comprises a rotating wheel 20 rotatably arranged on the side wall of the lower die 7, and a connecting rod 21 rotatably arranged on the outer end surface of the rotating wheel 20 is hinged with a sliding rod 22 slidably arranged on the bottom wall of the main liquid outlet pipe 16. When the temperature of the die changes, a shape memory metal sheet 30 arranged in an outer wall mounting shell 25 of a secondary liquid outlet pipe 19 is deformed due to the temperature change, a short toothed bar 31 connected with the shape memory metal sheet 30 is meshed with a third gear 28 rotatably arranged in the mounting shell 25, the third gear 28 rotates together with a second gear 27 coaxially arranged, the second gear 27 is meshed with a long toothed bar 24 slidably arranged on the front end surface of a lower die 7, the long toothed bar 24 is meshed with a first gear 23 coaxially arranged with a rotating wheel 20, through the series of transmission, when the temperature changes, the deformation of the shape memory metal sheet 30 drives the rotating wheel 20 to rotate, the rotating wheel 20 pushes a sliding rod 22 to slide through a connecting rod 21, and then a sliding plug 26 is driven to slide in a main liquid outlet pipe 16, when the sliding plug 26 slides down to a second position, the outer wall of the sliding plug 26 is plugged with the first shunt pipe 17, a runner 32 is communicated with the second shunt pipe 18, the flow direction of cooling liquid is changed at the moment, cooling emphasis is adjusted according to the actual cooling condition of a casting, through the cooperative work of the temperature sensing adjusting assembly and the sliding plug 26, the cooling effect of the cooling system can be further optimized according to the temperature change in the die casting, the cooling system and the cooling effect of the cooling system is further optimized, and the cooling quality is suitable for the cooling area is improved.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A street lamp die casting comprises a lamp housing main body (1), wherein the lamp housing main body (1) is of a structure with a closed top surface and an open bottom end, and is characterized in that a first mounting cavity (2) for mounting a lamp and a second mounting cavity (3) for mounting an electric element are formed in the lamp housing main body (1), a mounting part (4) for being connected with a lamp post is arranged on the side wall of the lamp housing main body (1), a plurality of radiating fins (5) protruding outwards are arranged on the top surface of the lamp housing main body (1), and the lamp housing main body (1), the first mounting cavity (2), the second mounting cavity (3), the mounting part (4) and the radiating fins (5) are formed through integral die casting.
2. The die casting of the street lamp as set forth in claim 1, wherein the lamp housing main body (1) is made of aluminum alloy, the aluminum alloy contains 90% of aluminum element, 4% of magnesium and 6% of silicon, so as to enhance the strength and heat dissipation performance of the material;
the height of the radiating fin (5) is the height of the side wall of the lamp housing main body (1) And the spacing between the adjacent radiating fins is 5mm-10mm;
The depth of the first installation cavity (2) is 3mm-5mm, and the depth of the second installation cavity (3) is 5mm-8mm.
3. An intelligent die casting production method for the street lamp die casting according to any one of claims 1-2, characterized by comprising the following steps:
s1, mounting a designed die-casting die to a die-casting machine, and preheating the die to 180-220 ℃;
S2, heating the aluminum alloy raw material to 680-720 ℃ to enable the aluminum alloy raw material to be completely melted, and carrying out degassing and refining treatment to remove impurities and bubbles;
S3, injecting the melted aluminum alloy raw material into a pressing chamber of a die casting machine through a feeding device, starting the die casting machine, and pressing the aluminum alloy liquid into a die cavity at a high speed under the pressure of 50-80MPa, wherein the pressure maintaining time is 3-5S;
S4, in the die casting process, temperature and pressure data are collected in real time through temperature sensors and pressure sensors arranged at the die cavity, the pressing chamber and the key part of the die casting machine and are transmitted to a control system, and when the temperature or pressure data deviate from a preset range, the control system automatically adjusts the heating power, the injection speed and the pressure of the die casting machine, so that the stability of the die casting process is ensured;
S5, after die casting is completed, injecting cooling liquid into a cooling runner of the die through a liquid pump to cool the die to 80-120 ℃, starting a demoulding device, and ejecting the formed street lamp die casting out of the die through a thimble;
S6, a post-treatment step, namely deburring and polishing the die casting of the demoulded street lamp, detecting air tightness and appearance quality, and packaging and warehousing qualified products.
4. The intelligent die casting production method of claim 3, wherein the temperature sensor is a K-type thermocouple and is respectively arranged at the top, the bottom and the side wall of the die cavity, and a feed inlet and a discharge outlet of the pressing chamber;
the pressure sensor adopts a strain gauge type pressure sensor and is arranged on a shot cylinder and a pressure maintaining cylinder of the die casting machine;
When the temperature data deviate from the preset range plus or minus 5 ℃, the amplitude of the heating power is adjusted to be 5-10kW, when the pressure data deviate from the preset range plus or minus 3MPa, the amplitude of the injection speed is adjusted to be 0.1-0.3m/s, and the amplitude of the pressure is adjusted to be 2-5MPa;
In the step S6, deburring adopts a vibration grinding mode, the grinding time is 10-15min, and the grinding medium is alumina particles;
in the step S6, a helium leak detector is adopted for the air tightness detection, the detection pressure is 0.5-0.8MPa, the dwell time is 2-3min, and the leak rate is not more than 5 multiplied by 10 < -6 > Pa m < 3 >/S, which is regarded as qualified.
5. The intelligent die casting production method according to claim 3, wherein in the step S1, the die casting die comprises an upper die (6) and a lower die (7) which are matched with each other, the upper die (6) is provided with a convex structure (9) which is matched with the shape of the opening at the bottom of the lamp housing main body (1), the lower die (7) is provided with a groove structure (10) which corresponds to the shape of the top of the lamp housing main body (1) and the shape of the radiating fins (5), the upper die (6) is provided with a material injection hole (8) for injecting aluminum alloy liquid into the groove structure (10), the inner parts of the upper die (6) and the lower die (7) are respectively provided with a main cooling channel (11) which is arranged around the convex structure (9) and the groove structure (10), and the upper die (6) and the lower die (7) are respectively provided with a liquid injection hole (14) and a first liquid outlet (15) which are communicated with the main cooling channel (11).
6. The intelligent die casting production method of claim 5, wherein a main liquid outlet pipe (16) is connected to the first liquid outlet (15) on the lower die (7), a secondary cooling channel (12) surrounding the position of the radiating fins (5) in the groove structure (10) is arranged inside the lower die (7), a second liquid outlet (13) is further arranged on the lower die (7), one end of the second liquid outlet (13) is communicated with the secondary cooling channel (12), the other end of the second liquid outlet is connected with a secondary liquid outlet pipe (19), a first shunt pipe (17) and a second shunt pipe (18) are connected to the side wall of the main liquid outlet pipe (16), one end of the first shunt pipe (17) is far away from the main liquid outlet pipe (16) and is communicated with the secondary cooling channel (12), a sliding plug (26) is arranged inside the main liquid outlet pipe (16), a sliding plug (26) is arranged on the lower die (26), when a runner (32) is arranged on the second liquid outlet (26), the first shunt pipe (17) and the second shunt pipe (26) are communicated with the second shunt pipe (32) when the first shunt pipe (26) is far from the second shunt pipe (32), the outer wall of the lower die (7) is provided with a temperature-sensing adjusting component for adjusting a sliding plug (26) to vertically slide so as to block/open the first shunt pipe (17) and the second shunt pipe (18).
7. The intelligent die casting production method of claim 6, wherein the temperature sensing adjusting assembly comprises a rotating wheel (20) rotatably mounted on the side wall of the lower die (7), a connecting rod (21) is rotatably mounted on the outer end face of the rotating wheel (20), a sliding rod (22) is slidably mounted on the bottom wall of the main liquid outlet pipe (16), and one end, far away from the rotating wheel (20), of the connecting rod (21) is hinged with the sliding rod (22).
8. The intelligent die casting production method of claim 7, wherein the temperature sensing adjusting assembly further comprises a first gear (23) coaxially arranged with the rotary wheel (20) and a long toothed bar (24) slidably arranged on the front end face of the lower die (7), the long toothed bar (24) is meshed with the first gear (23), a mounting shell (25) is arranged on the outer wall of the auxiliary liquid outlet pipe (19), a second gear (27) meshed with the long toothed bar (24) is rotatably arranged in the mounting shell (25), a third gear (28) is coaxially arranged on the second gear (27), an extension pipe (29) extending along the radial direction of the second gear is arranged on the side wall of the auxiliary liquid outlet pipe (19), a shape memory metal sheet (30) is arranged in the extension pipe (29), a short toothed bar (31) is connected to the shape memory metal sheet (30), and the short toothed bar (31) is meshed with the third gear (28).
9. The intelligent die casting production method as claimed in claim 8, wherein the side wall of the mounting shell (25) is provided with a sliding opening, and the long toothed bar (24) is connected inside the sliding opening in a sliding manner.
10. The intelligent die casting production method as claimed in claim 7, wherein the first shunt tube (17) is located on the side wall of the upper portion of the main liquid outlet tube (16), the second shunt tube (18) is located on the side wall of the lower portion of the main liquid outlet tube (16), and the first shunt tube (17) is located above the second shunt tube (18).
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| CN202510556084.5A CN120212469B (en) | 2025-04-29 | 2025-04-29 | Street lamp die casting and intelligent die casting production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120430780A (en) * | 2025-04-29 | 2025-08-05 | 广东中深精密科技有限公司 | Fault management method and system for door body die castings |
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| JP2011100672A (en) * | 2009-11-09 | 2011-05-19 | Nippon Light Metal Co Ltd | Heat sink |
| CN109882749A (en) * | 2019-03-05 | 2019-06-14 | 严伯勤 | A kind of LED street lamp bulb shell and its production technology |
| CN111578198A (en) * | 2020-06-07 | 2020-08-25 | 武汉钟码科技有限公司 | Long service life's LED ceiling lamp |
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