Semi-closed tubular aluminum profile heat treatment device

Abstract

The utility model discloses a semi-closed tubular aluminum profile heat treatment device, and belongs to the technical field of aluminum profile heat treatment. A middle supporting frame is arranged at one end of the bottom of the inner side of the box body; a rotating disc is rotationally connected to the middle supporting frame; annular teeth are arranged in the middle of the rotating disc on the opposite side of a hollow column; a plurality of groups of limiting columns surround the outer side of the annular teeth; the gear set comprises a first gear and a third chain wheel, a first chain is arranged on the third chain wheel, a first driving device is arranged on the outer side of the box body, the extending end of the first driving device penetrates through the inner side of the box body to be sequentially provided with a second gear, a third gear and the third gear which are in meshed connection with the annular teeth, and the second gear is in meshed connection with the first gear. A telescopic supporting mechanism is arranged in the second through hole. The heat treatment device can be used for carrying out heat treatment on a plurality of groups of aluminum pipes and removing impurities on the surfaces of the aluminum pipes, so that the aluminum pipes are heated more uniformly, and the heat treatment efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to aluminium alloy heat treatment technical field, concretely speaking, especially relate to a semi -closed tubular aluminium alloy heat treatment device. BACKGROUND

[0002] Aluminium alloy is widely used in aerospace, automobile, building and other fields because of its small density, high specific strength, good corrosion resistance and other advantages. But the initial aluminium alloy organization and performance have the shortage, is difficult to meet the complex working condition demand. Heat treatment can change the organization structure of aluminium alloy by controlling heating, holding and cooling process, wherein the heating part is the main step.

[0003] The patent with the authorized announcement number "CN221117500U" discloses an aluminium alloy heat treatment device. The aluminium alloy heat treatment device comprises a treatment box, a rotating mechanism, a pushing-out mechanism and two closing mechanisms are arranged on the treatment box. The rotating mechanism comprises a fixed shaft, a first motor, a sliding sleeve, a fixed disc and a plurality of placing rods. The fixed shaft is rotatably installed in the treatment box. The first motor is fixedly installed on the outer wall of the treatment box. The output shaft of the first motor is fixedly connected with one end of the fixed shaft. The sliding sleeve is slidably sleeved on the fixed shaft. The fixed disc is fixedly sleeved on the sliding sleeve. The plurality of placing rods are fixedly installed on the fixed disc. The above patent solves the problem of placing aluminium alloy separately, but can only heat treat aluminium alloy of one size. If there are impurities on the aluminium alloy, they cannot be cleaned in time, which will make the heat treatment of the aluminium alloy insufficient.

[0004] In view of the above technical problems, the present application provides a solution. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of overcoming the deficiency of the prior art and provides a semi-closed tubular aluminium alloy heat treatment device which can heat treat multiple groups of aluminium pipes and remove impurities on the surface of the aluminium pipes, so that the aluminium pipes are heated more uniformly and the heat treatment efficiency is higher.

[0006] The semi-closed tubular aluminum profile heat treatment device, including a box, the inside of the box is provided with a telescopic support mechanism, the inside of the box is fixedly connected with a heater at the top, one end of the bottom of the inside of the box is fixedly connected with a middle support frame, the middle support frame is in the shape of "L", one end of the middle support frame is parallel to the opening direction of the box, a turntable is rotatably connected to the middle support frame, the turntable is fixedly connected with a hollow column towards the opening direction of the box, the opposite side of the hollow column is fixedly connected with a ring gear in the middle of the turntable, a plurality of limiting columns are arranged around the outer side of the ring gear, a gear set is rotatably connected to the limiting columns, the gear set includes gear one and gear three, the gear three is meshingly connected with chain one, the outside of the box is fixedly connected with a driving device one, the protruding end of the driving device one is fixedly connected with gear two and gear three in sequence through the inside of the box, the gear three is meshingly connected with the ring gear, the gear two is meshingly connected with the gear one, the same number of through holes two as the limiting columns are arranged on the turntable outside the limiting columns, the through holes two are rotatably connected with telescopic support mechanisms.

[0007] Preferably, the telescopic support mechanism includes a hollow tube rotatably connected with the through hole two, one end of the hollow tube is fixedly connected with a chain wheel two through the turntable, the chain wheel two is meshingly connected with the chain one, two groups of through holes one are arranged on the hollow tube, each group of through holes one has four openings, four-way sliders are slidingly connected in each group of through holes one, four connecting rods three are rotatably connected to the four-way sliders, support plates are rotatably connected to one end of the connecting rods three, the connecting rods three on the two four-way sliders on the same side are fixed on the same support plate, an inner bidirectional screw is nestedly connected in the middle of the hollow tube, the four-way sliders are threadedly connected with the inner bidirectional screw, the inner bidirectional screw is provided with an inner hexagonal hole towards the opening side of the box.

[0008] Preferably, the middle support frame is provided with side support frames fixedly connected with the box on both sides, screws are rotatably connected to the side support frames, clamping devices are threadedly connected to the screws, the clamping devices are in the shape of circular arc half-enclosing structure, the inside of the clamping devices abuts against both sides of the turntable, two rotating wheels are rotatably connected to the inside of the clamping devices, the rotating wheels abut against the side surfaces of the turntable, the screws are rotatably connected with the box, the screws are fixedly connected with chain wheels one through one side of the box, the upper part of the driving device one is provided with a rear support plate fixedly connected with the box, the rear support plate is fixedly connected with a driving device two, a chain wheel four is fixedly connected to the protruding end of the driving device two, chain two is meshingly connected to the chain wheel four, the chain two is meshingly connected with the two chain wheels one.

[0009] Preferably, the bottom of the central support frame is provided with two slide rails on both sides, and a telescopic cleaning mechanism is slidably connected to the two slide rails. The telescopic cleaning mechanism includes a slide plate, a connecting rod one rotatably connected to the slide plate and a connecting rod two slidably connected to the slide plate. The connecting rod one and the connecting rod two are rotatably connected, and a cleaning plate is rotatably connected to one end of the connecting rod two. The connecting rod one and the connecting rod two are respectively rotatably connected to the middle of their bottoms. A double-acting screw is threaded between the two rotation limits. One end of the double-acting screw is provided with a rotatable limit. The bottom of the central support frame is provided with an adjustment hole, and the adjustment hole and the double-acting screw are on the same axis.

[0010] Preferably, two sprockets 6 are rotatably connected in the middle of the two slide rails, a drive device 3 is fixedly connected to the bottom of the drive device 1, the drive device 3 is perpendicular to the drive device 1, a sprocket 5 is fixedly connected to the extended end of the drive device 3, a chain 3 is meshed on the sprocket 5, the chain 3 passes through the housing and meshes with the two sprockets 6, and the bottom of the slide plate is fixedly connected to the chain 3 on one side.

[0011] Preferably, two tracks are fixedly connected to the upper and lower ends of the box opening, and a door is slidably connected between the two tracks.

[0012] Preferably, a slot is provided on one side of the bottom of the hollow column, and the width of the slot is the same as the width of the central support frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the setting of multiple sets of telescopic support mechanisms, can be adjusted to match aluminum tubes of different sizes for processing, preventing uneven heat treatment caused by aluminum tubes of excessive size always having only one side facing the heater during the rotation of the turntable.

[0015] 2. This utility model has a telescopic cleaning mechanism at the bottom of the box. By adjusting the internal bidirectional screw, aluminum tubes of different sizes can be cleaned. Cleaning can be carried out during cooling or during heat treatment to clean impurities generated during heat treatment.

[0016] 3. This utility model can make the turntable rotate and drive all the telescopic support mechanisms on the turntable to rotate through a single driving device, or make each telescopic support mechanism on the turntable rotate independently, ensuring that the aluminum tube on the telescopic support mechanism is heated evenly and heat-treated better. This results in faster heating, shorter heat treatment time, and greater time savings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the rear structure of the box body of this utility model;

[0020] Figure 4 This is a detailed internal view of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of the structure of section A;

[0022] Figure 6 for Figure 4 Enlarged view of the structure of section B;

[0023] Figure 7 This is an exploded view of the internal structure of this utility model;

[0024] Figure 8 Exploded view of each part of the telescopic support mechanism;

[0025] Figure 9 This is a detailed structural diagram of the internal structure of this utility model;

[0026] Figure 10 This is a schematic diagram of the internal side structure of this utility model;

[0027] Figure 11 for Figure 10 Enlarged view of the structure of section C;

[0028] In the diagram, 1. Box body; 101. Track; 102. Door; 103. Central support frame; 104. Side support frame; 105. Adjustment hole; 106. Rear support plate; 2. Telescopic cleaning mechanism; 201. Cleaning plate; 202. Connecting rod one; 203. Slide plate; 204. Two-way lead screw; 205. Rotation limit; 206. Connecting rod two; 3. Lead screw; 301. Clamping device; 3011. Rotating wheel; 302. Sprocket one; 4. Telescopic support mechanism; 401. Sprocket two; 402. Four-way slider; 403. Through hole one; 404. Connecting rod three; 4. 05. Support plate; 406. Internal double-acting lead screw; 407. Internal hexagonal hole; 408. Hollow tube; 5. Heater; 6. Turntable; 601. Through hole two; 602. Limiting post; 603. Ring gear; 604. Gear set; 6041. Gear one; 6042. Sprocket three; 605. Chain one; 606. Hollow column; 7. Drive device one; 701. Gear two; 702. Gear three; 8. Drive device two; 801. Sprocket four; 9. Chain two; 10. Drive device three; 1001. Sprocket five; 1002. Chain three; 1003. Sprocket six. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figures 1 to 11 As shown, a semi-enclosed tubular aluminum profile heat treatment device includes a housing 1. The aluminum profile is heat-treated inside the housing 1. A telescopic support mechanism 4 is provided inside the housing 1. A heater 5 is fixedly connected to the top inner side of the housing 1. The heater 5 mainly serves as a heat source to diffuse heat outward to heat the aluminum profile. A central support frame 103 is fixedly connected to one end of the bottom inner side of the housing 1. The central support frame 103 is L-shaped, and one end of the central support frame 103 is parallel to the opening direction of the housing 1. A turntable 6 is rotatably connected to the central support frame 103. A hollow column 606 is fixedly connected to the turntable 6 facing the opening direction of the housing 1. The main function of the hollow column 606 is to increase the contact area of ​​the central support frame 103 of the turntable 6 and prevent damage to the turntable 6 during rotation. A ring tooth 603 is fixedly connected to the middle of the turntable 6 on one side opposite the hollow column 606. Multiple sets of limiting posts 602 surround the outer side of the ring tooth 603. A gear set 604 is rotatably connected to the limiting posts 602. The gear set 604 includes a gear 6041 and a sprocket 6042. A chain 605 is meshed on the sprocket 6042. A drive device 7 is fixedly connected to the outer side of the housing 1. The extended end of the drive device 7 passes through the inner side of the housing 1 and is sequentially fixedly connected to gears 701 and 702. Gear 702 meshes with the ring tooth 603, driving the turntable 6 to rotate, causing multiple telescopic support mechanisms 4 to revolve around the central support frame 103. Gear 701 meshes with gear 6041, driving a single telescopic support mechanism 4 to rotate. The turntable outside the limiting posts 602 has the same number of through holes 601 as the limiting posts 602. Telescopic support mechanisms 4 are rotatably connected within the through holes 601.

[0032] like Figure 7 and 8As shown, the telescopic support mechanism 4 includes a hollow tube 408 rotatably connected to the second through hole 601. One end of the hollow tube 408 passes through the turntable 6 and is fixedly connected to a second sprocket 401. The second sprocket 401 is meshed with a chain 605. Two sets of first through holes 403 are provided on the hollow tube 408. Each set of first through holes 403 has four openings. A four-way slider 402 is slidably connected in each set of first through holes 403. The four-way slider 402 can slide back and forth inside the first through hole 403. Four connecting rods 404 are rotatably connected to the four-way slider 402. One end of the connecting rod 404 is rotatably connected to the support plate 405. The connecting rods 404 on the two four-way sliders 402 on the same side are fixed to the same support plate 405. An inner double-acting screw 406 is nested in the middle of the hollow tube 408. The four-way slider 402 is threadedly connected to the inner double-acting screw 406. The inner double-acting screw 406 has an internal hexagonal hole 407 on the side facing the opening of the housing 1. By rotating the internal hexagonal hole 407, the inner double-acting screw 406 can be rotated, which drives the two sets of four-way sliders 402 to move towards the middle at the same time or to both sides at the same time, so that the support plate 405 can support aluminum profiles of different sizes.

[0033] like Figure 4 , Figure 6 and Figure 9 As shown, the central support frame 103 has side support frames 104 fixedly connected to the housing 1 on both sides. A lead screw 3 is rotatably connected to the side support frame 104, and a clamping device 301 is threaded onto the lead screw 3. The clamping device 301 has an arc-shaped semi-enclosed structure. The two sides inside the clamping device 301 abut against the two sides of the turntable 6, surrounding the turntable 6. Rotation of the lead screw 3 enables the turntable 6 to slide and extend on the central support frame 103, facilitating the placement and removal of aluminum profiles. Two rotating wheels 3011 are rotatably connected inside the clamping device 301. The rotating wheels 3011 abut against the sides of the turntable 6. When the turntable 6 rotates around the central support frame 103, the rotating wheels 3011 rotate with the turntable 6, reducing friction between them. The lead screw 3 is rotatably connected to the housing 1. The lead screw 3 passes through one side of the housing 1 and is fixedly connected to a sprocket 302. The upper part of the drive device 7 is provided with a rear support plate 106 fixedly connected to the housing 1. The drive device 8 is fixedly connected to the rear support plate 106. The extended end of the drive device 8 is fixedly connected to a sprocket 801. The sprocket 801 is meshed with a chain 9. The chain 9 is meshed with the two sprockets 302. The advantage of this design is that only one drive device 8 is needed to control the two lead screws 3 to rotate synchronously, so as to realize the extension and retraction of the turntable 6.

[0034] like Figure 10 and Figure 11As shown, the bottom of the central support frame 103 is provided with two slide rails on both sides. A telescopic cleaning mechanism 2 is slidably connected to the two slide rails. The telescopic cleaning mechanism 2 includes a sliding plate 203. A connecting rod 1 202 and a sliding connecting rod 206 are rotatably connected to the sliding plate 203. The connecting rod 1 202 and the connecting rod 206 are rotatably connected, and the connecting rod 1 202 is slidably connected to the cleaning plate 201. One end of the connecting rod 206 is rotatably connected to the cleaning plate 201. The bottom of the connecting rod 1 202 and the connecting rod 206 are... The two rotating limiters 205 are rotatably connected to each other, and a double-acting screw 204 is threaded between the two rotating limiters. One end of the double-acting screw 204 is provided with a rotatable limiter. The bottom of the middle support frame 103 is provided with an adjustment hole 105. The adjustment hole 105 and the double-acting screw 204 are on the same axis. By rotating the double-acting screw 204, the connecting rod 1 202 and the connecting rod 206 can be brought closer or further apart, so as to realize the extension and retraction of the cleaning plate 201, so as to realize the impurity removal treatment of aluminum profiles of different sizes.

[0035] Two sprockets 1003 are rotatably connected between the two slide rails. Drive device 10 is fixedly connected to the bottom of drive device 7. Drive device 10 is perpendicular to drive device 7. Sprocket 51001 is fixedly connected to the extended end of drive device 310. Chain 31002 is meshed on sprocket 51001. Chain 31002 passes through the housing 1 and meshes with the two sprockets 1003. The bottom of the slide plate 203 is fixedly connected to one side of chain 31002. The advantage of this design is that by rotating drive device 310, chain 31002 is driven to rotate, which can drive the telescopic cleaning mechanism 2 fixed on chain 31002 to reciprocate. Furthermore, by placing drive device 310 on the outside of housing 1, the high temperature inside housing 1 can prevent drive device 310 from being damaged.

[0036] Two tracks 101 are fixedly connected to the upper and lower ends of the opening of the housing 1, and a door 102 is slidably connected between the two tracks 101. The door 102 can be opened and closed by sliding. A slot is provided on one side of the bottom of the hollow column 606. The width of the slot is the same as the width of the central support frame 103. The reason for this design is that when the turntable 6 moves out of the housing, the hollow column 606 can also come out of the inside, preventing the turntable 6 from not coming out completely due to the hollow column 606.

[0037] Those skilled in the art can use existing technologies they possess, such as installing appropriate mechanical limit switches or photoelectric sensors, to limit the specified positions of each actuator during the following operation process; to achieve automated operation, this utility model can use numerical control technology or PLC to control the actions of each actuator.

[0038] Working process: Slide door 102 to both sides, start drive device 28 to rotate, the lead screws 3 on both sides rotate, the clamping device 301 on the lead screw 3 pushes the turntable 6 to move outward. When the telescopic support mechanism 4 is completely moved out of the box 1, the aluminum tube is nested on the telescopic support mechanism 4. Use an electric screwdriver to turn the internal hexagonal hole 407. The internal bidirectional lead screw 406 drives the two four-way sliders 402 to move towards the middle. The connecting rod 3 404 on the four-way sliders 402 pushes the support plate 405 to expand outward until the support plate 405 stops expanding when it abuts against the inside of the aluminum tube. Start drive device 28 to rotate the lead screw 3, which in turn drives the turntable 6 and the telescopic support mechanism 4 to move into the box 1. At this time, the electric screwdriver passes through the adjustment hole 105 to rotate the bidirectional lead screw 204, which raises the cleaning plate 201. When the cleaning plate 201 abuts against the aluminum tube, the rotation stops and the door 102 is closed.

[0039] Start drive device 7. Drive device 7 drives gears 701 and 702 to rotate. Gear 702 drives ring gear 603 to rotate, and turntable 6 begins to rotate. Gear 701 drives gear 6041 to rotate, sprocket 6042 drives chain 605 to rotate, and chain 605 drives telescopic support mechanism 4 to rotate, thus causing the aluminum tubes to start rotating. Start drive device 10. Drive device 10 drives chain 1002 to reciprocate. Telescopic cleaning mechanism 2, fixed on chain 1002, telescopically moves, and cleaning plate 201 begins to clean impurities on different aluminum tubes. After cleaning, heater 5 is started. Heater 5 performs uniform heat treatment on multiple aluminum tubes. Impurities generated on the aluminum tubes during the heat treatment process are also cleaned by cleaning plate 201.

[0040] After the aluminum tube has undergone heat treatment, turn off heater 5, open door 102, start drive device 8, rotate screw 3, and move telescopic support mechanism 4 out of the box 1 to proceed to the next step.

[0041] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A semi-enclosed tubular aluminum profile heat treatment device, comprising a housing (1), characterized in that: The box (1) is equipped with a telescopic support mechanism (4) inside. A heater (5) is fixedly connected to the top of the inner side of the box (1). A middle support frame (103) is fixedly connected to one end of the bottom of the inner side of the box (1). The middle support frame (103) is "L" shaped. One end of the middle support frame (103) is parallel to the opening direction of the box (1). A turntable (6) is rotatably connected to the middle support frame (103). A hollow column (606) is fixedly connected to the turntable (6) facing the opening direction of the box (1). A ring tooth (603) is fixedly connected to the middle of the turntable (6) on the opposite side of the hollow column (606). Multiple sets of limiting posts (602) surround the outer side of the ring tooth (603). A gear set (604) is rotatably connected to the limiting post (602). The gear set (604) includes a gear one (6041) and a sprocket three (6042). The sprocket three (6042) 2) A chain 1 (605) is meshed with the upper part. A drive device 1 (7) is fixedly connected to the outside of the box (1). The extended end of the drive device 1 (7) passes through the inside of the box (1) and is fixedly connected to gear 2 (701) and gear 3 (702) in sequence. Gear 3 (702) meshes with ring gear (603). Gear 2 (701) meshes with gear 1 (6041). The turntable outside the limiting post (602) is provided with the same number of through holes 2 (601) as the limiting post (602). A telescopic support mechanism (4) is rotatably connected inside the through holes 2 (601).

2. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 1, characterized in that: The telescopic support mechanism (4) includes a hollow tube (408) rotatably connected to the second through hole (601). One end of the hollow tube (408) passes through the turntable (6) and is fixedly connected to a sprocket (401). The sprocket (401) meshes with a chain (605). The hollow tube (408) has two sets of first through holes (403). Each set of first through holes (403) has four openings. A four-way slider (402) is slidably connected in each set of first through holes (403). The four-way slider (402) rotates on the first through hole (402). The device is connected by four connecting rods (404), one end of which is rotatably connected to a support plate (405). The connecting rods (404) on the two four-way sliders (402) on the same side are fixed on the same support plate (405). The hollow tube (408) is nested with an inner double-acting screw (406). The four-way slider (402) is threadedly connected to the inner double-acting screw (406). The inner double-acting screw (406) has an internal hexagonal hole (407) on the side facing the opening of the box (1).

3. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 1, characterized in that: The central support frame (103) has side support frames (104) fixedly connected to the housing (1) on both sides. A lead screw (3) is rotatably connected to the side support frame (104). A clamping device (301) is threadedly connected to the lead screw (3). The clamping device (301) has an arc-shaped semi-enclosed structure. The two sides inside the clamping device (301) abut against the two sides of the turntable (6). Two rotating wheels (3011) are rotatably connected inside the clamping device (301). The rotating wheels (3011) abut against the sides of the turntable (6). The lead screw (3) is rotatably connected to the housing (1). The lead screw (3) passes through one side of the housing (1) and is fixedly connected to a sprocket (302). The upper part of the drive device (7) is provided with a rear support plate (106) fixedly connected to the housing (1). The rear support plate (106) is fixedly connected to a drive device (8). The extended end of the drive device (8) is fixedly connected to a sprocket (801). The sprocket (801) is meshed with a chain (9). The chain (9) is meshed with two sprockets (302).

4. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 1, characterized in that: The central support frame (103) has two slide rails on both sides of its bottom. A telescopic cleaning mechanism (2) is slidably connected to the two slide rails. The telescopic cleaning mechanism (2) includes a slide plate (203). A connecting rod 1 (202) is rotatably connected to the slide plate (203), and a connecting rod 2 (206) is slidably connected to it. The connecting rod 1 (202) and the connecting rod 2 (206) are rotatably connected. A cleaning plate (201) is rotatably connected to one end of the connecting rod 2 (206). The connecting rod 1 (202) and the cleaning plate (201) are slidably connected. Rotation limiters (205) are rotatably connected to the bottom middle of the connecting rod 1 (202) and the connecting rod 2 (206). A two-way screw (204) is threaded between the two rotation limiters. A rotatable limiter is provided at one end of the two-way screw (204). An adjustment hole (105) is provided at the bottom of the central support frame (103). The adjustment hole (105) and the two-way screw (204) are on the same axis.

5. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 4, characterized in that: Two sprockets (1003) are rotatably connected in the middle of the two slide rails. The bottom of the drive device (7) is fixedly connected to the drive device (10). The drive device (10) is perpendicular to the drive device (7). The extended end of the drive device (10) is fixedly connected to the sprocket (1001). The chain (1002) is meshed on the sprocket (1001). The chain (1002) passes through the box (1) and meshes with the two sprockets (1003). The bottom of the slide plate (203) is fixedly connected to the chain (1002) on one side.

6. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 1, characterized in that: The box (1) has two tracks (101) fixedly connected at the top and bottom ends of the opening, and a door (102) is slidably connected between the two tracks (101).

7. The heat treatment apparatus for semi-enclosed tubular aluminum profiles according to claim 1, characterized in that: The hollow column (606) has a slot on one side of its bottom, and the width of the slot is the same as the width of the central support frame 103.

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