Feeding structure for an aluminium profile extrusion press

Abstract

The application discloses an aluminum profile extruding machine feeding structure and relates to the technical field of extruding machine feeding, which comprises a scrap collecting box body, a hot air heat insulation and blowing assembly and a roller conveying assembly. An upper arc plate and a lower arc plate form a cylindrical containing cavity which can be turned open and closed. A rotary driving element can lift the upper arc plate to quickly feed and maintain. The hot air assembly sprays vortex hot air through skew holes on different surfaces to form a hot air heat insulation layer to reduce the temperature drop of the aluminum bar during transfer, and the aluminum scrap is blown away in the whole region. When the aluminum bar rotates, the rollers frictionally cooperate with the vortex airflow to double remove the surface aluminum scrap, and the aluminum scrap is uniformly collected into the scrap collecting box body. The application solves the multiple defects of the existing maintenance difficulty of the heat preservation channel, the large temperature drop of the aluminum bar and the aluminum scrap residue, and considers the multiple functions of heat preservation, scrap removal, self-centering and rapid operation and maintenance. The application is suitable for the transfer of aluminum alloy short bars of multiple specifications and can greatly improve the yield rate of extruded profiles and the production line operation rate.

Description

Technical Field

[0001] This invention relates to the field of extrusion press feeding technology, specifically to a feeding structure for an aluminum profile extrusion press. Background Technology

[0002] In the full-process extrusion production of aluminum profiles, aluminum bars are heated to 480–510°C in a gas-fired long bar hot shearing furnace, and then cut into short bars of fixed length by a hot shearing machine. These short bars are then transported through a transfer channel to the extrusion cylinder of the extrusion press for extrusion forming. The temperature stability and surface cleanliness during the aluminum bar transfer stage directly determine the extrusion production efficiency and the yield of finished profiles. Both existing mainstream transfer schemes have significant inherent defects: (1) Open bare roller transfer scheme Traditional uninsulated bare roller conveyors rely solely on ordinary rollers to transport hot-sheared short bars, without any enclosed insulation structure. The ambient air in the workshop continuously exchanges heat with the high-temperature aluminum bars via convection. In winter, under drafty conditions, the temperature drop of the aluminum bars over a 1-meter transport distance can reach 15-35°C. When the surface temperature of the aluminum bars falls below the lower limit of the extrusion process, it directly leads to a sudden increase in extrusion pressure, bar blockage, die clogging, profile twisting, orange peel-like surface texture, and out-of-tolerance dimensional defects. Simultaneously, there is no collection structure for aluminum shavings and oxide scale detached from the aluminum bars, scattering on the workshop floor and in the gaps of the roller conveyor. High-temperature aluminum shavings coming into contact with oil stains are highly flammable, posing a significant fire safety hazard. Without a chip removal structure, aluminum shavings enter the die's distribution holes with the aluminum bars, causing permanent scratches and black spots on the profile surface, increasing the scrap rate of hard alloy profiles.

[0003] (2) Integrated fixed enclosed insulated passage solution To reduce temperature drop, the industry has developed a fully enclosed fixed insulated roller conveyor system. This system uses steel plates and high-temperature resistant insulation cotton to completely enclose the roller conveyor. While this reduces heat dissipation to some extent, it also introduces several irreconcilable drawbacks: ① The maintenance and cleaning are extremely difficult: The shell is a fixed structure welded as a whole, and the internal rollers, insulation layer and aluminum shavings accumulation area are completely sealed. When aluminum shavings adhere to the roller and insulation cotton falls off and blocks the channel, the entire insulation shell needs to be disassembled. The downtime for a single cleaning is 2 to 4 hours, which seriously occupies continuous production capacity. Aluminum shavings accumulate inside the sealed shell for a long time. The heat dissipation of the sealed space is poor. The high temperature aluminum shavings are very easy to spontaneously combust, and the fire cannot be detected in time. ② The insulation method is simple and the heat exchange loss is still serious: relying only on the outer layer of insulation cotton to isolate external radiation heat dissipation, the aluminum rod is in large-area contact with the metal roller, and heat is continuously lost through metal conduction; there is no active airflow insulation structure inside the channel, and the surface of the aluminum rod is in direct contact with the cylinder wall for heat conduction, resulting in excessive core surface temperature difference during long-distance transport. ③ No automatic chip removal function, aluminum chips continue to accumulate: There is no blowing structure inside the channel, so the oxide scale and aluminum chips adhering to the surface of the aluminum rod cannot be peeled off and continue to accumulate between the roller and the cylinder wall. Long-term use will jam the roller and cause the aluminum rod conveying to be stuck. ④ The aluminum rod cannot rotate on its own, resulting in blind spots in local heat dissipation and chip removal: The aluminum rod is conveyed in a fixed posture on the roller conveyor, and the bottom of the aluminum rod is in contact with the roller for a long time. This area continuously conducts heat and cools down over a large area. At the same time, the aluminum chips adhering to the bottom are not blown away by airflow and remain on the surface of the profile, making it impossible to eliminate defects in the finished product.

[0004] In addition, in the few existing technologies that use jet purging for heat preservation channels, the jet holes are all vertically aligned with the outer wall of the aluminum rod. The airflow can only purify a local area in one direction and cannot form a full-area vortex, thus limiting the purging range.

[0005] Chinese invention patent CN112828396A discloses an aluminum profile processing device, which includes an arc-shaped conveyor table with a roller mounting groove at the top. A movable roller is installed inside the roller mounting groove, and the movable roller is connected to a transmission gear via a rolling rod. An aluminum ingot cutting blade assembly is fixedly installed at the bottom of a lifting hydraulic cylinder. A heating box is embedded at the top of a fixed support plate, with a bidirectional lead screw passing through one end of the heating box. A rotating groove is opened inside the heating box, and a rotating wheel is installed inside the rotating groove. The movable roller drives the aluminum ingot to move into the heating box. This solution facilitates the rapid transport of the cut aluminum ingot into the heating box and solves the technical problem of uneven heating caused by partial heating of the aluminum ingot during heating through circulating heating.

[0006] Although the above technical solution provides a secondary heating method for the cut aluminum ingots, the purpose of heating is to ensure that the aluminum ingots are heated evenly before being put into production, and it cannot take into account both the technical effects of aluminum ingot heat preservation and aluminum shavings treatment.

[0007] In summary, existing aluminum profile conveying and feeding structures cannot simultaneously meet the four core requirements of heat preservation and temperature control, automatic cleaning of aluminum chips throughout the entire process, axial self-centering of aluminum bars, and rapid opening and closing for maintenance. They suffer from multiple defects such as low yield, large capacity loss, numerous safety hazards, and high operation and maintenance costs. There is an urgent need for an aluminum profile extrusion press feeding structure to solve the problems existing in the current technology. Summary of the Invention

[0008] The purpose of this invention is to provide a technical solution for the feeding structure of an aluminum profile extrusion press, so as to solve the technical problem that the existing aluminum profile transfer feeding structure cannot simultaneously meet the four major requirements of heat preservation and temperature control, automatic cleaning of aluminum chips throughout the entire area, axial self-centering of aluminum bars, and rapid opening and closing for maintenance.

[0009] To achieve the above objectives, the present invention provides the following technical solution: The feeding structure of the aluminum profile extrusion press includes a chip collection box, a hot air insulation blowing assembly, and a roller conveyor assembly; A support is fixedly installed on the bottom inner side of the chip collection box. A lower arc plate is mounted on the support above the support. An upper arc plate is matched and fastened on the upper arc plate. The upper and lower arc plates together form a cylindrical receiving cavity that extends along the axis. The receiving cavity is a transfer channel for high-temperature aluminum short rods. The upper and lower arc plates are connected at two joint boundaries, with a rotation boundary and a separation boundary respectively. A rotation drive is installed near the rotation boundary. The output end of the rotation drive is fixedly connected to the upper arc plate and is used to drive the upper arc plate to rotate upward around the rotation boundary. After the upper arc plate is fully rotated and lifted, the top of the receiving cavity is fully open, which can be used to feed aluminum rods and carry out maintenance and cleaning of the internal roller conveyor and hot air components. The rotation drive reverses and drives the upper arc plate to reset. The upper and lower arc plates close and seal along the separation boundary to form a closed and insulated conveying space. The hot air insulation purging assembly includes an annular groove, an annular flow groove, jet oblique holes, air distribution pipe, and air inlet pipe; multiple sets of annular grooves are equally spaced along the axial direction on the inner sidewall of the receiving cavity, and annular flow grooves are opened at positions corresponding to the annular grooves inside the sidewall of the receiving cavity; several jet oblique holes are equally spaced along the circumference at the bottom of each set of annular grooves, and the axis of the jet oblique holes is not intersecting with the central axis of the receiving cavity. The gas distribution pipe is fixedly arranged along the outer side of the upper arc plate. A connecting groove is opened inside the upper arc plate. Both ends of the gas distribution pipe are sealed and connected to all the annular flow grooves through the connecting grooves. The middle of the gas distribution pipe is connected to the fixed air inlet pipe. The air inlet pipe is connected to the hot air supply pipe. The hot air supply pipe can be directly connected to the hot air outlet of the aluminum rod heating furnace or an independent air heating device. After the hot air enters the gas distribution pipe through the air inlet pipe, it is evenly distributed to each group of annular flow grooves and finally sprayed obliquely into the cavity through the jet oblique hole. The oblique airflow forms an annular vortex airflow around the outer wall of the aluminum rod inside the cavity. On the one hand, the vortex airflow forms a continuous hot air insulation layer between the aluminum rod and the inner wall of the cavity, blocking the aluminum rod from radiating and conducting heat dissipation to the cylinder wall. On the other hand, the vortex airflow continuously acts on the outer wall of the aluminum rod, driving the aluminum rod to rotate at a low speed around its own central axis. The roller conveyor assembly includes multiple sets of mounting slots and rollers; several sets of mounting slots are arranged in a circumferential ring on the inner wall of the lower arc plate, and rollers can be rotatably assembled in each set of mounting slots. The axis of the rollers is inclined to the central axis of the receiving cavity and they are not parallel; along the axial extension direction of the receiving cavity, the inside of the receiving cavity is divided into two sections, M section and N section. All rollers in the M section and all rollers in the N section are arranged in a planar symmetrical manner. When the aluminum rod is conveyed inside the receiving cavity, the outer wall of the aluminum rod forms a line contact support with the roller surface. The roller transforms the surface contact support between the aluminum rod and the inner wall of the receiving cavity into a line contact support, which greatly reduces the heat loss of the aluminum rod to the cylinder wall. At the same time, a sandwich space is formed between the aluminum rod and the roller, which allows the vortex hot air to circulate. The hot air sandwich continuously wraps around the outer wall of the aluminum rod, further stabilizing the temperature of the aluminum rod. When the aluminum rod is driven to rotate by the vortex airflow, the inclined rollers rotate synchronously with the aluminum rod. The rollers generate a reaction thrust along the axial direction of the receiving cavity on the aluminum rod. The axial thrust generated by the rollers in the M and N areas is completely opposite. When the aluminum rod is axially offset by external force, the number of contacts between the aluminum rod and the rollers in the M and N areas will be different. The opposing thrusts on both sides will form a resultant force difference, which will automatically correct the aluminum rod to the axial center position of the receiving cavity, realizing self-centering conveying without additional limiting components. The vortex airflow continuously sweeps the outer wall of the aluminum rod, and the aluminum rod rotates simultaneously, causing line contact friction with the roller surface. The roller scrapes off the aluminum chips and oxide scale adhering to the surface of the aluminum rod. The airflow and mechanical friction work together to form a dual chip removal effect. The peeled aluminum chips are discharged from the openings at both ends of the receiving cavity under the action of the vortex pressure difference inside the receiving cavity, and finally fall into the chip collection box for centralized collection, avoiding the aluminum chips from scattering and accumulating.

[0010] This invention features a temperature regulating valve and an infrared temperature probe connected in series on the air inlet pipe. The infrared temperature probe collects the temperature of the hot air inside the pipe in real time, and the temperature regulating valve automatically adjusts the flow rate of the hot air entering the pipe based on the temperature data fed back by the temperature probe. This keeps the temperature of the hot air injected into the receiving cavity stably controlled at 450-480°C, which is slightly lower than the temperature range of the aluminum rod extrusion process. This avoids local overheating of the aluminum rod caused by high-temperature hot air, and at the same time prevents low-temperature cold air from contacting the aluminum rod and causing an aggravated temperature drop.

[0011] This invention limits the tilt angle of the roller relative to the central axis of the receiving cavity to 5° to 10°. This angle range can balance the axial thrust of the roller on the aluminum rod and the frictional resistance of the aluminum rod's rotation: when the tilt angle is less than 5°, the axial thrust is insufficient and the self-centering correction effect of the aluminum rod fails; when the tilt angle is greater than 5°, the frictional force of the aluminum rod's rotation increases significantly, and the vortex airflow is difficult to drive the aluminum rod to rotate at a uniform speed, resulting in a decrease in the chip removal and overall heat preservation effects; the 5° to 10° tilt range can simultaneously meet the dual requirements of self-centering limit and low-resistance rotation.

[0012] The present invention embeds a high-temperature resistant flexible sealing strip into the mating end face at the separation interface; after the upper arc plate and the lower arc plate are closed, the sealing strip fills the mating gap, reducing the leakage of internal hot air from the gap and ensuring the stability of the eddy current.

[0013] The present invention provides negative pressure exhaust ports on both sides of the chip collection box, and negative pressure dust removal fans are connected to the negative pressure exhaust ports. The negative pressure fans continuously create a negative pressure environment at both ends of the receiving cavity, which, together with the internal vortex airflow, forms a directional airflow field, accelerating the discharge of aluminum chips from both ends of the receiving cavity, improving the aluminum chip collection efficiency, and preventing aluminum chips from accumulating in the receiving cavity for a long time.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features a rapidly flip-open cavity structure, completely solving the problems of difficult maintenance of enclosed channels and the risk of aluminum shavings igniting. Utilizing a flip-up upper arc plate structure, the upper arc plate can be lifted with a single click by rotating the drive component, completely opening the top of the cavity. No disassembly of any housing components is required, allowing operators to directly perform aluminum rod feeding, roller replacement, aluminum shavings cleaning from the cylinder wall, and hot air assembly maintenance, significantly improving the continuous operation rate of the production line. An external, independent shavings collection box is provided to collect all detached aluminum shavings, preventing them from scattering and accumulating in the roller gaps, thus eliminating the fire safety hazard of spontaneous combustion of high-temperature aluminum shavings at the source.

[0015] 2. This invention designs an eccentric inclined hole vortex hot air structure, simultaneously achieving low-loss heat preservation and full-area airflow chip removal, solving the dual problems of temperature drop during aluminum rod transport and aluminum chip residue. Existing technologies rely solely on passive heat insulation with an outer layer of insulation cotton. This invention forms a continuous annular vortex hot air layer surrounding the aluminum rod through eccentric arrangement of jet inclined holes. The hot air forms a dynamic air curtain between the aluminum rod and the cylinder wall, blocking the heat dissipation path. The vortex airflow surrounds the aluminum rod without dead angles, and combined with the low-speed rotation of the aluminum rod, it can cover the entire outer wall area of ​​the aluminum rod, eliminating blind spots. High-temperature hot air is used, and there is no low-temperature cold air contacting the aluminum rod, causing localized cooling.

[0016] 3. This invention features a symmetrical inclined roller conveyor with a self-centering structure, eliminating the need for additional limiting components to achieve automatic centering of the aluminum rods and simplifying the equipment structure. The invention employs a symmetrical inclined roller layout in zones M and N, relying on the reverse axial thrust difference generated by the rollers during the aluminum rod's rotation to automatically correct its position. Regardless of whether the aluminum rod deviates towards the feed or discharge end, it can return to center under the action of the thrust difference, eliminating the risk of axial movement and falling. The invention also eliminates the need for independent limiting and guiding components, reducing equipment procurement costs and friction points. A hot air circulation interlayer is formed between the rollers and the aluminum rod, allowing vortex-like hot air to pass through the interlayer and envelop the bottom of the aluminum rod, eliminating the bottom heat dissipation blind spot.

[0017] 4. This invention designs a dual chip removal mechanism of airflow blowing + roller friction, which significantly reduces the surface defect rate of profiles. On the one hand, the vortex hot air continuously peels off the loose oxide scale and aluminum chips on the surface of the aluminum rod. On the other hand, during the rotation of the aluminum rod, the roller continuously scrapes off the aluminum dross that is tightly adhered to the bottom of the aluminum rod. The two work together to achieve deep chip removal throughout the entire area. The peeled aluminum chips are quickly discharged into the chip collection box under the combined action of vortex pressure difference and negative pressure at both ends. The aluminum chips will not enter the extrusion die with the aluminum rod. Attached Figure Description

[0018] Figure 1 This is a three-dimensional assembly view of the overall external structure of the aluminum profile extrusion press feeding structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the closed state of the receiving cavity after the chip collection box body is removed according to the present invention; Figure 3 This is a three-dimensional schematic diagram of the cavity in the open state after the chip collection box body has been removed according to the present invention; Figure 4 This is a top view of the aluminum profile extrusion press feeding structure of the present invention; Figure 5 for Figure 3 The top view corresponding to the open state of the cavity shown; Figure 6 for Figure 4 A radial section view obtained by cutting along section AA.

[0019] The following are the labeling elements in the diagram: 101, chip collection box; 102, upper arc plate; 103, lower arc plate; 104, rotation junction; 105, separation junction; 106, rotation drive component; 201, annular groove; 202, annular flow groove; 203, jet oblique hole; 204, air distribution pipe; 205, air inlet pipe; 301, mounting groove; 302, roller; 303, M zone; 304, N zone. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: As Figures 1-6 As shown, the present invention provides a technical solution for the feeding structure of an aluminum profile extrusion press, comprising three core modules: a chip collection box 101, a hot air insulation blowing assembly, and a roller conveyor assembly.

[0022] The chip collection box 101 is a rectangular closed box structure. The bottom plane inside the box is welded and fixed with steel support components. The lower arc plate 103 is bolted on the upper part of the support components. The lower arc plate 103 is a lower semi-circular arc steel plate. The upper arc plate 102 is matched and fastened on the upper part of the lower arc plate 103. The upper arc plate 102 is an upper semi-circular arc steel plate. The two are joined together to form a complete cylindrical receiving cavity.

[0023] The upper arc plate 102 and the lower arc plate 103 have two butt joints on the left and right sides, namely the rotation junction 104 and the separation junction 105, respectively. A rotation drive component 106 is installed near the rotation junction 104. In this embodiment, the rotation drive component is a swing hydraulic cylinder. The cylinder body of the swing hydraulic cylinder is fixed to the side wall of the chip collection box 101, and the end of the rotating shaft of the swing hydraulic cylinder is fixedly connected to the outer wall of the upper arc plate 102 near the rotation junction 104. When the rotating shaft of the swing hydraulic cylinder rotates, it causes the upper arc plate 102 to flip and lift upwards along the rotation junction 104, completely opening the top of the receiving cavity. Figure 3 In the open state, the operator can directly place the hot-sheared high-temperature aluminum short bars horizontally into the receiving cavity, while simultaneously visually inspecting and cleaning the aluminum dross adhering to the internal rollers 302 and air jet orifices 203; the rotating shaft of the swing hydraulic cylinder rotates in the opposite direction, driving the upper arc plate 102 to return to its original position downwards. The upper arc plate 102 and the lower arc plate 103 are completely fitted together along the separation interface 105, forming a sealed conveying channel in the receiving cavity. Figure 2 Closed state; in another embodiment, the rotation drive is replaced by a high-temperature resistant motor or a motor assembly with a heat-insulating protective structure instead of a swing hydraulic cylinder.

[0024] The hot air insulation purging assembly is integrated on the inner and outer sides of the upper arc plate 102 and the lower arc plate 103: six sets of annular grooves 201 are equidistantly opened along the inner wall of the upper arc plate 102 and the lower arc plate 103, and each set of annular grooves 201 is arranged along the circumferential arc; an annular flow groove 202 is opened inside the upper arc plate 102 and the lower arc plate 103, and the annular flow groove 202 is a closed annular hollow channel; 12 jet oblique holes 203 are evenly opened along the circumferential direction on the bottom groove wall of each set of annular grooves 201, and the axis of all jet oblique holes 203 is not intersecting with the central axis of the receiving cavity. After the airflow is ejected, it is injected into the receiving cavity along the circumferential direction, and the multiple sets of oblique holes jet air synchronously to form a continuous annular vortex.

[0025] An arc-shaped gas distribution pipe 204 is axially fixed to the outer side of the upper arc plate 102. A connecting groove is pre-embedded inside the upper arc plate 102, and the connecting groove runs horizontally through all the annular flow grooves 202. The two ends of the gas distribution pipe 204 are respectively sealed and welded to the two ends of the connecting groove. The middle of the gas distribution pipe 204 is vertically connected to the air inlet pipe 205. The air inlet pipe 205 extends upward through the chip collection box 101 and is connected to the hot air recovery pipeline of the aluminum rod heating furnace. It directly uses high-temperature hot air of about 480℃ as the air source, without the need for additional air heating. Hot air flow path: heating furnace hot air → air inlet pipe 205 → gas distribution pipe 204 → connecting groove → each group of annular flow grooves 202 → jet oblique hole 203 → vortex airflow is formed inside the receiving cavity.

[0026] All roller conveyor components are assembled on the inner walls of the upper arc plate 102 and the lower arc plate 103. The inner walls of the upper arc plate 102 and the lower arc plate 103 are arranged in a circular array along the arc. 18 sets of mounting slots 301 are arranged in a circular array. Each set of mounting slots 301 is equipped with a set of rotatable rollers 302. The rollers 302 are made of high-temperature resistant and wear-resistant alloy steel. The axes of all rollers 302 are inclined to the opposite plane from the central axis of the receiving cavity and are not parallel. The receiving cavity is divided into two sections, M section 303 and N section 304, along the midpoint of the axis. All rollers in M ​​section 303 are arranged to the right at an angle, and all rollers in N section 304 are arranged to the left at an angle. The rollers in the two sections have a planar symmetrical mirror structure.

[0027] Complete equipment workflow: 1. Feeding stage: Control the rotation drive component 106 to rotate the shaft, and the upper arc plate 102 flips upward to open the receiving cavity. Figure 3 (State), the high-temperature aluminum short rods cut by the hot shearing machine are placed inside the receiving cavity by a manual / robotic arm above the rollers 302 in the M zone 303 and N zone 304. The bottom of the aluminum rod forms multi-point line contact support with multiple sets of rollers 302. 2. Closing and heat preservation stage: The rotating drive component 106 rotates in reverse, the upper arc plate 102 closes downward, the separation junction 105 is sealed, the hot air supply pipeline is started, the high temperature hot air is introduced into the air distribution pipe 204 through the air inlet pipe 205, and distributed to all the jet oblique holes 203 to be sprayed out obliquely, forming a surrounding vortex hot air layer on the outer wall of the aluminum rod. 3. Conveying Self-Centering Stage: The vortex airflow continuously impacts the outer wall of the aluminum rod, driving the aluminum rod to rotate at a low speed around its own axis; when the aluminum rod rotates, the friction force drives the roller 302 to rotate synchronously and passively, the inclined roller 303 in zone M generates an axial thrust on the aluminum rod, and the inclined roller 304 in zone N generates a reverse thrust in zone M; if the aluminum rod is shifted towards the feeding end by external force, the number of contacts between the aluminum rod and the roller 304 in zone N increases and the number of contacts between the aluminum rod and the roller 303 in zone M decreases, and the difference in reverse thrust pushes the aluminum rod towards the middle of the receiving cavity; if the aluminum rod shifts towards the discharge end, the thrust in zone M is dominant, and the aluminum rod is automatically corrected to be centered, without the need for additional limit baffles throughout the process; 4. Dual chip removal and collection stage: The vortex hot air continuously blows the outer wall of the aluminum rod to peel off the loose aluminum chips; during the rotation of the aluminum rod, the roller 302 continuously scrapes off the oxide scale that is tightly attached to the bottom of the aluminum rod; under the action of the vortex pressure difference inside the receiving cavity, the peeled aluminum chips fall from the openings at both ends of the receiving cavity and finally settle to the bottom of the chip collection box 101 for centralized collection. The side door of the chip collection box 101 is opened periodically to clean the aluminum chips uniformly. 5. Maintenance and cleaning stage: When the production line is shut down to clean aluminum shavings and replace worn rollers 302, the rotating drive 106 is restarted to lift the upper arc plate 102, and the receiving cavity is fully opened. The operator can directly reach in to clean the aluminum shavings on the cylinder wall and the surface of rollers 302, replace the damaged rollers 302, and close the cavity after the operation is completed to resume production.

[0028] In Example 2, based on Example 1, an electric temperature regulating valve and an infrared temperature probe are connected in series on the air intake pipe 205. The detection end of the infrared temperature probe extends into the air intake pipe 205 to collect the real-time temperature of the hot air and transmit the temperature signal to the production line PLC control system. The PLC presets a standard hot air temperature range of 450-480℃. When the temperature probe detects that the hot air temperature is higher than 480℃, the control system controls the temperature regulating valve to close the pipe opening and reduce the hot air flow. When the temperature probe detects that the hot air temperature is lower than 450℃, the control system controls the regulating valve to open the pipe and increase the hot air supply.

[0029] This embodiment precisely stabilizes the temperature of the hot air inside the cavity, avoiding the problem of localized overheating of the aluminum rod surface caused by instantaneous overheating of the hot air in the heating furnace. It also prevents the loss of insulation effect due to excessively low hot air temperature, making it suitable for the extrusion production of temperature-sensitive high-strength aluminum alloys. The remaining structure and workflow are completely consistent with Embodiment 1.

[0030] In Example 3, based on Example 1, the tilt angle of roller 302 relative to the central axis of the receiving cavity is set to 7°. At this tilt angle, the axial thrust of roller 302 on aluminum rod is moderate, and the frictional resistance of aluminum rod driven by vortex airflow is smaller. This ensures the rapid centering correction performance after aluminum rod deviates, and also maintains the stable low-speed rotation of aluminum rod, ensuring the whole-area chip removal and uniform heat preservation effect.

[0031] Example 4, based on the combination of Examples 2 and 3, makes two optimizations and upgrades: 1. Grooves are cut on the upper and lower mating surfaces at the separation junction 105, and high-temperature resistant flexible aluminum silicate sealing strips are embedded in them. After the upper arc plate 102 is closed, the sealing strips completely fill the mating gaps, blocking the leakage of internal hot air and further reducing the temperature drop during aluminum rod transfer. 2. Square negative pressure exhaust ports are opened on the opposite side walls of the chip collection box 101. The exhaust ports are connected to an industrial negative pressure dust removal fan through pipes. The fan continuously creates a negative pressure environment at both ends of the receiving cavity, which, together with the internal vortex airflow, forms a directional airflow field, accelerating the discharge of aluminum chips from both ends of the receiving cavity to the outside, preventing aluminum chips from suspending and accumulating in the vortex area in the middle of the receiving cavity, improving the aluminum chip collection efficiency, and adapting to 24-hour uninterrupted continuous mass production lines.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An aluminium profile extrusion press feed structure characterised in that: Includes a chip collection box (101), a hot air blowing and heat insulation assembly, and a roller conveyor assembly; The chip collection box (101) is provided with an openable cylindrical cavity. The cavity is formed by an upper arc plate (102) and a lower arc plate (103) that cooperate with each other. The upper arc plate (102) can be flipped open or closed relative to the lower arc plate (103) to realize the opening and closing of the cavity. The hot air blowing insulation component is disposed on the inner wall of the receiving cavity; The hot air blowing insulation assembly includes an annular groove (201), an annular flow groove (202), jet inclines (203), air distribution pipe (204), and air inlet pipe (205); the inner side wall of the receiving cavity is provided with an annular groove (201), the inner wall of the receiving cavity is provided with an annular flow groove (202) communicating with the annular groove (201), the bottom of the annular groove (201) is provided with several jet inclines (203), the air distribution pipe (204) connects to all the annular flow grooves (202), and the air inlet pipe (205) is connected to an external hot air source; the air outlet direction of the jet inclines (203) is arranged opposite to the axis of the receiving cavity, and the hot air ejected forms a vortex airflow surrounding the aluminum rod in the receiving cavity; The roller conveyor assembly includes multiple sets of rollers (302) arranged at an inclination inside the receiving cavity. The axis of the rollers (302) is not parallel to the axis of the receiving cavity. The receiving cavity is divided into two symmetrical inclined roller sections along the axial direction. The two roller sections generate axial thrust in opposite directions on the aluminum rod. The roller (302) forms a line contact support with the outer wall of the aluminum rod. The roller (302) converts the surface contact support between the aluminum rod and the wall of the cavity into a line contact support, reducing the heat conduction area of ​​the aluminum rod to the cavity wall. A sandwich space is formed between the roller (302) and the aluminum rod that allows hot air to circulate. The vortex airflow drives the aluminum rod to rotate and blows away aluminum chips on the surface of the aluminum rod. The inclined roller area automatically corrects the axial position of the aluminum rod through the thrust difference, so that the aluminum rod is kept in the middle of the receiving cavity for conveying. The aluminum chips that are blown off enter the chip collection box (101) under the action of airflow to complete the centralized collection.

2. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: A rotation junction (104) and a separation junction (105) are provided between the upper arc plate (102) and the lower arc plate (103). A rotation drive (106) is installed at the rotation junction (104). The rotation drive (106) drives the upper arc plate (102) to rotate around the rotation junction (104) as the axis of rotation to open the receiving cavity.

3. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: The aluminum rod rotates continuously under the drive of the vortex airflow. During the rotation of the aluminum rod, the outer wall of the aluminum rod continuously rubs against the surface of the roller (302). The roller (302) produces a mechanical scraping effect on the surface of the aluminum rod. The mechanical scraping function of the roller (302) and the vortex airflow blowing function of the hot air blowing insulation component work together to form a dual chip removal function.

4. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: The accommodating cavity is axially divided into M zone (303) and N zone (304). The inclined rollers (302) in M ​​zone (303) and N zone (304) are arranged in a planar symmetrical manner. When the aluminum rod is axially offset, the number of contacts between the aluminum rod and the rollers (302) in M ​​zone (303) and N zone (304) will be different. The aluminum rod will be automatically centered and positioned without guides by the difference in reverse axial thrust.

5. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: A temperature probe and a temperature regulating valve are installed on the air inlet pipe (205). The temperature probe detects the hot air temperature in real time, and the temperature regulating valve automatically adjusts the hot air flow rate according to the temperature feedback result to stabilize the hot air temperature inside the cavity.

6. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: The roller (302) is tilted at an angle of 5° to 10° relative to the axis of the receiving cavity. This reduces the frictional resistance of the aluminum rod's rotation while ensuring the aluminum rod's self-centering and correction capabilities, and adapts to the stable drive of the vortex airflow to rotate the aluminum rod.

7. The feeding structure of an aluminum profile extrusion press according to claim 2, characterized in that: A high-temperature resistant seal is provided at the junction (105) of the upper arc plate (102) and the lower arc plate (103). When the upper arc plate (102) and the lower arc plate (103) are closed, the seal seals the joint gap.

8. The feeding structure of an aluminum profile extrusion press according to claim 1, characterized in that: The chip collection box (101) is provided with negative pressure exhaust structures at both ends. The negative pressure exhaust structures, together with the internal vortex airflow, form a directional airflow field to accelerate the discharge and collection of aluminum chips from both ends of the receiving cavity.

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