Aluminum profile cutting device

Abstract

The invention discloses an aluminum profile cutting device and relates to the field of aluminum profile machining, the aluminum profile cutting device comprises a base table, a cutting assembly, a positioning assembly and a supporting assembly, a bearing block used for bearing an aluminum profile is arranged in the middle of the base table, the positioning assembly comprises two oppositely-arranged positioning plates, and the two positioning plates slide oppositely to clamp the two ends of the aluminum profile; the supporting assembly comprises two supporting blocks which slide in the directions close to each other and away from each other, the supporting blocks are connected with the aluminum profile in an inserted mode and matched with the aluminum profile in a sliding mode, and the two supporting blocks slide to the cutting position of the aluminum profile to support the cutting position of the aluminum profile. Supporting wheels are rotationally connected to the peripheral sides of the supporting blocks, the supporting wheels elastically ascend and descend on the supporting blocks, driving assemblies for driving the supporting wheels to rotate by 90 degrees are arranged on the supporting blocks, and locking pieces for locking the ascending and descending actions of the supporting wheels are further arranged on the supporting blocks. By means of the aluminum profile cutting device, the cutting end face of an aluminum profile can be smoother.

Description

Technical Field

[0001] This application relates to the field of aluminum profile processing, and in particular to an aluminum profile cutting device. Background Art

[0002] Square tube aluminum profiles are aluminum materials with a square cross-section. After extrusion molding, the aluminum profiles need to be cut to obtain aluminum profiles of the required length.

[0003] When cutting aluminum profiles, the saw blade will generate a squeezing force on the cutting position of the aluminum profile. After cutting, it will cause the cutting end face of the aluminum profile to deform, that is, the cutting end face of the aluminum profile is not flat after cutting, which is not conducive to subsequent processing such as welding. Summary of the Invention

[0004] In order to make the cutting end face of the aluminum profile more flat after cutting, this application provides an aluminum profile cutting device.

[0005] An aluminum profile cutting device provided by this application adopts the following technical solutions:

[0006] An aluminum profile cutting device includes a base, a cutting assembly, a positioning assembly, and a support assembly. A supporting block for supporting the aluminum profile is arranged in the middle of the base. The positioning assembly includes two relatively arranged positioning plates, and the two positioning plates slide towards each other to clamp the two ends of the aluminum profile. The support assembly includes two support blocks that slide in the direction of approaching and separating from each other. The support blocks are inserted into and slidably matched with the aluminum profile, and the two support blocks slide to the cutting position of the aluminum profile to support the cutting position of the aluminum profile. Support wheels are rotatably connected to the circumferences of the support blocks, and the support wheels elastically lift on the support blocks. A driving assembly for driving the support wheels to rotate 90 degrees is arranged on the support blocks, and a locking member for locking the lifting action of the support wheels is also arranged on the support blocks.

[0007] By adopting the above technical solution, the aluminum profile is placed on the supporting block, and then the two positioning plates slide towards each other and abut against both ends of the aluminum profile to achieve the positioning of the aluminum profile. Then the two supporting blocks slide, and the supporting blocks extend into the aluminum profile. When the supporting blocks move, the supporting wheels rollingly cooperate with the inner wall of the aluminum profile. When the supporting blocks move to the cutting position of the aluminum profile, the driving assembly drives the whole supporting wheels to rotate 90 degrees. At this time, the supporting wheels play a supporting role for the aluminum profile, and the locking member locks the lifting action of the supporting wheels, which can prevent the elastic lifting of the supporting wheels during the cutting process, that is, improve the stability of the support, and thus contribute to making the cutting end face of the aluminum profile flatter. In this application, if the supporting wheels with elastic lifting are not adopted and the supporting blocks are directly used for support, the plug-in fit between the supporting blocks and the aluminum profile can only adopt clearance fit to ensure that the supporting blocks can be smoothly inserted into the aluminum profile. However, the clearance fit will cause the supporting blocks to be unable to effectively support the aluminum profile. Therefore, through the elastic supporting wheels, it can be ensured that the supporting wheels abut against the inner wall of the aluminum profile, and when the supporting blocks are inserted, it also plays a role of rolling cooperation, which is convenient for the insertion of the supporting blocks into the aluminum profile. Since in the initial state, the supporting wheels rollingly cooperate with the inner wall of the aluminum profile, when the supporting blocks move in place, the highest point of the supporting wheels supports the aluminum profile. However, at this time, the semicircle in front of the highest point of the supporting wheels will be located within the cutting end face, which will hinder the cutting action. Therefore, the supporting wheels are driven to rotate 90 degrees to avoid the position of the saw blade.

[0008] Preferably, the cutting assembly includes a saw blade and a first lead screw slide table vertically arranged on the base table. A driving motor is arranged on the slide seat of the first lead screw slide table, and the driving motor drives the saw blade to rotate.

[0009] By adopting the above technical solution, the first lead screw slide table drives the saw blade to lift, and the driving motor drives the saw blade to rotate, so that the cutting action of the aluminum profile can be realized.

[0010] Preferably, the positioning assembly further includes two groups of positioning wheels. Any group of positioning wheels includes at least two positioning wheels. The two groups of positioning wheels are distributed on both sides of the aluminum profile and both slide along the direction of approaching and departing from the aluminum profile.

[0011] By adopting the above technical solution, the aluminum profile is placed on the supporting block. The positioning wheels first slide and abut against the side of the aluminum profile to correct the position of the aluminum profile. Then the two positioning plates slide and abut against the end face of the aluminum profile to correct the position of the aluminum profile again, so as to ensure that the cutting position of the aluminum profile is moved below the saw blade.

[0012] Preferably, a second lead screw slide is provided on the base, the positioning plate is arranged on the slide of the second lead screw slide, the positioning plate is L-shaped, and an avoidance opening for avoiding the support block is formed in the vertical part of the positioning plate; a third lead screw slide is also provided on the base, the positioning wheel is rotatably connected to the slide of the third lead screw slide, and the rotation axis of the positioning wheel is vertical.

[0013] By adopting the above technical solution, when the third lead screw slide operates, it can drive the positioning wheel to abut against the side of the aluminum profile. When the second lead screw slide operates, it can drive the positioning plate to slide and gradually abut against the end face of the aluminum profile. Then, the support block slides through the avoidance opening and can be inserted and matched with the aluminum profile.

[0014] Preferably, a long rod cylinder is provided on the base, and the support block is fixedly connected to the end of the piston rod of the long rod cylinder.

[0015] By adopting the above technical solution, when the long rod cylinder operates, it can drive the support block to slide.

[0016] Preferably, a lifting groove is formed in the support block, a lifting rod is slidably connected in the lifting groove, a support wheel is rotatably connected to the end of the lifting rod, a compression spring is installed on the bottom wall of the lifting groove, one end of the compression spring is connected to the bottom wall of the lifting groove, and the other end of the compression spring is connected to the end of the lifting rod.

[0017] By adopting the above technical solution, in the initial state, the area enclosed by the highest points where the support wheels are far from the support block is slightly larger than the cross-sectional area of the inner hole of the aluminum profile. When the support block enters the aluminum profile, the support wheels are compressed into the aluminum profile, and the support wheels are pressed tightly against the inner wall of the aluminum profile. That is, through this elastic lifting, the support wheels can be tightly abutted against the aluminum profile; if a spring is not used for elastic support, if there are errors in the processing of the aluminum profile, the support wheels cannot ensure tight abutment against the inner wall of the aluminum profile.

[0018] Preferably, a driven gear is rotatably connected in the lifting groove, a positioning groove is formed in the inner ring of the driven gear, a positioning block is arranged on the circumference of the lifting rod, and the lifting rod is inserted and slidably matched with the driven gear, and the positioning block is inserted and slidably matched with the positioning groove; the driving assembly includes a toothed belt, a driving gear and a support gear. An installation groove is formed in the support block, four support gears are provided, and are distributed at the four corners of one side wall of the installation groove. The toothed belt is wound around all the support gears, the driving gear is meshed with the toothed belt, and a servo motor for driving the driving gear to rotate is installed in the installation groove; a driving rack is fixedly connected to the toothed belt, and the driving rack is meshed with the driven gear.

[0019] By adopting the above technical solution, after the support block moves to the cutting position of the aluminum profile, the servo motor drives the driving gear to rotate. The driving gear drives the toothed belt to rotate, the toothed belt drives the driving rack to move, and the driving rack drives the driven gear to rotate. Through the limitation of the positioning block and the positioning groove, the lifting rod can be driven to rotate 90 degrees, that is, the rotation of the support wheel is realized.

[0020] Preferably, a locking groove is formed in the inner wall of the lifting groove. The locking member is arranged as a locking block. A connecting block is arranged on the lifting rod. A sliding groove is formed in the connecting block. The locking block is slidably matched with the sliding groove. A contact spring is arranged in the locking groove. One end of the contact spring is connected to the inner wall of the sliding groove, and the other end of the contact spring is connected to the locking block. A first wedge surface is formed at the end of the locking block, and a second wedge surface is formed on one side of the notch of the locking groove.

[0021] By adopting the above technical solution, in the initial state, the locking block is in a contracted state, and the end of the locking block abuts against the inner wall of the lifting groove. When the driven gear drives the lifting rod to rotate 90 degrees, the locking block just moves to the locking groove. At this time, under the action of the contact spring, the locking block extends into the locking groove and is inserted into the locking groove. At this time, with the cooperation of the locking groove and the locking block, the locking and limiting of the lifting action of the lifting rod can be realized; after the cutting action is completed, the driven gear reverses, and under the cooperation of the first wedge surface and the second wedge surface, the locking block disengages from the locking groove and resets.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. After the aluminum profile is positioned, the support block extends into the aluminum profile. At this time, the support wheel abuts against the inner wall of the aluminum profile and forms a rolling fit. When the support block moves to the cutting position of the aluminum profile, the support wheel rotates 90 degrees. By the support of all the support wheels on the cutting end face of the aluminum profile, it helps to improve the flatness of the cutting end face of the aluminum profile;

[0024] 2. With the rotation of the toothed belt, the support wheels around the support block can be driven to rotate 90 degrees synchronously. And when the support wheel rotates, the locking block rotates into the locking groove synchronously to lock the lifting rod, preventing vibration during cutting, resulting in the floating of the support wheel and affecting the flatness of the end face of the aluminum profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the structure of the support block in the embodiment of the present application;

[0027] Figure 3This is a schematic cross-sectional view of the support block in the embodiment of the present application, mainly showing the structure of the driving component;

[0028] Figure 4 This is a schematic cross-sectional view of the support block in the embodiment of the present application, mainly showing the structure of the lifting rod;

[0029] Figure 5 This is a partial schematic view of the embodiment of the present application, mainly showing the structure of the driven gear;

[0030] Figure 6 This is a partial schematic view of the embodiment of the present application, a top view schematic of the support block, mainly showing the structure of the locking block and the locking groove.

[0031] Reference numerals: 1, base; 11, supporting block; 12, second lead screw slide; 13, third lead screw slide; 14, long rod cylinder; 2, cutting assembly; 21, saw blade; 22, first lead screw slide; 3, positioning assembly; 31, positioning plate; 311, avoidance opening; 32, positioning wheel; 4, support assembly; 41, support block; 411, installation groove; 5, support wheel; 6, driving assembly; 61, toothed belt; 611, driving rack; 62, driving gear; 63, supporting gear; 7, lifting groove; 71, compression spring; 72, driven gear; 721, positioning groove; 73, locking groove; 731, second wedge surface; 8, lifting rod; 81, sliding block; 82, positioning block; 83, connecting block; 831, sliding groove; 832, abutting spring; 9, servo motor; 10, locking block; 101, first wedge surface. Detailed implementation manners

[0032] The following will Figure 1-6 make a further detailed description of the present application in conjunction with the attached

[0033] The embodiment of the present application discloses an aluminum profile cutting device.

[0034] Referring to Figure 1 , the aluminum profile cutting device includes a base 1, a cutting assembly 2, a positioning assembly 3 and a support assembly 4. A supporting block 11 for supporting the aluminum profile is fixedly connected to the middle of the base 1.

[0035] The cutting assembly 2 includes a saw blade 21 and a first lead screw slide 22. The first lead screw slide 22 is installed on the base 1 in the vertical direction. A driving motor is installed on the slide of the first lead screw slide 22, and the driving motor drives the saw blade 21 to rotate. The saw blade 21 is located above the supporting block 11, and a cutting opening for avoiding the saw blade 21 is opened on the supporting block 11.

[0036] The positioning component 3 includes a positioning plate 31 and positioning wheels 32. There are two positioning plates 31. The two positioning plates 31 are arranged oppositely and slide in the directions of approaching and separating from each other. There are two groups of positioning wheels 32. Each group has at least two positioning wheels 32. The two groups of positioning wheels 32 are distributed on both sides of the aluminum profile, and the positioning wheels 32 slide in the directions of approaching and separating from the aluminum profile.

[0037] During the actual working process, the aluminum profile is placed on the supporting block 11. The positioning wheels 32 slide and gradually abut against the aluminum profile, so that the aluminum profile is aligned. Then the two positioning plates 31 slide, and the positioning plates 31 abut against the ends of the aluminum profile. Subsequently, the aluminum profile is driven to move, and the position of the aluminum profile can be corrected again.

[0038] Two second lead screw sliders 12 are installed on the base 1, corresponding to the two positioning plates 31 one by one. The positioning plates 31 are L-shaped. The horizontal part of the positioning plate 31 is fixedly connected to the slider of the second lead screw slider 12. An avoidance opening 311 is formed in the vertical part of the positioning plate 31. A third lead screw slider 13 is also installed on the base 1. The number of the third lead screw sliders 13 is the same as and corresponds to the number of the positioning wheels 32 one by one. The positioning wheels 32 are rotatably connected to the slider of the third lead screw slider 13, and the rotation axis of the positioning wheels 32 is vertical.

[0039] The third lead screw slider 13 operates to drive the positioning wheels 32 to move and gradually abut against the aluminum profile. At this time, the positioning wheels 32 form a rolling fit with the aluminum profile. Then the second lead screw slider 12 operates, and the two positioning plates 31 slide towards each other and drive the aluminum profile to slide. At this time, the aluminum profile slides under the guiding action of the positioning wheels 32.

[0040] The support component 4 includes two support blocks 41. The two support blocks 41 slide in the directions of approaching and separating from each other. Two long rod cylinders 14 are installed on the base 1, corresponding to the two support blocks 41 one by one. The support blocks 41 are fixedly installed at the ends of the piston rods of the corresponding long rod cylinders 14.

[0041] Refer to Figure 1 、 Figure 2 and Figure 3 , support wheels 5 are rotatably connected to the circumferences of the support blocks 41, and the support wheels 5 elastically lift on the support blocks 41. Here, the lifting movement is referenced to the surface of the support blocks 41. A driving component 6 for driving the support wheels 5 to rotate 90 degrees is arranged in the support blocks 41, and a locking member for locking the lifting action of the support wheels 5 is also arranged in the support blocks 41.

[0042] After the position of the aluminum profile is positioned, the support blocks 41 slide. The two support blocks 41 slide through the avoidance openings 311 and extend into the aluminum profile. During the movement, the support wheels 5 rollingly cooperate with the inner wall of the aluminum profile. When reaching the cutting position, the driving assembly 6 drives the support wheels 5 to rotate 90 degrees as a whole to support the aluminum profile. At the same time, the locking member locks the lifting action of the support wheels 5 to avoid affecting the stability due to elastic lifting during cutting, thereby improving the flatness of the cut end face of the aluminum profile. If the support blocks 41 directly using non-elastic support wheels 5 are adopted, insertion needs to be achieved through clearance fit, but the clearance will cause support failure. The elastic support wheels 5 can not only elastically press against the inner wall of the aluminum profile, but also reduce the resistance through rolling cooperation during insertion. In addition, after the support wheels 5 in the initial rolling state reach the position, the front semi-circle of the highest point will hinder cutting, and rotating 90 degrees can avoid the position of the saw blade 21.

[0043] Refer to Figure 2 、 Figure 3 and Figure 4 As shown in, a lifting groove 7 is formed in the support block 41. A lifting rod 8 is slidably connected in the lifting groove 7. The support wheel 5 is rotatably connected to the end of the lifting rod 8. A sliding block 81 adapted to the size of the lifting groove 7 is formed at one end of the lifting rod 8 away from the support wheel 5. A compression spring 71 is installed on the bottom wall of the lifting groove 7, and the other end of the compression spring 71 is connected to the sliding block 81.

[0044] In the initial state, the enclosed area formed by the highest point of the support wheel 5 away from the support block 41 is slightly larger than the cross-section of the inner hole of the aluminum profile. When the support block 41 is inserted into the aluminum profile, the support wheel 5 is elastically contracted under extrusion and enters the inner cavity of the aluminum profile. At the same time, it is tightly pressed against the inner wall of the aluminum profile through elastic force. This elastic lifting design can adapt to the machining error of the inner hole of the aluminum profile to ensure that the support wheel 5 always maintains effective contact with the inner wall. If the elastic support of the spring is cancelled, when there is a tolerance in the size of the inner hole of the aluminum profile, the support wheel 5 may have a gap with the inner wall due to the inability to adaptively adjust, resulting in support failure or inaccurate positioning, affecting the flatness of the cut end face of the aluminum profile after cutting.

[0045] Refer to Figure 3 、 Figure 4 and Figure 5, a driven gear 72 is rotatably connected to the lifting groove 7 through a bearing. A positioning groove 721 is formed in the inner ring of the driven gear 72. A positioning block 82 is arranged on the circumferential side of the lifting rod 8. The lifting rod 8 is inserted and slidably engaged with the driven gear 72, and the positioning block 82 is inserted and slidably engaged with the positioning groove 721. When the lifting rod 8 moves up and down, the positioning block 82 will not disengage from the positioning groove 721. The driving assembly 6 includes a toothed belt 61, a driving gear 62 and a supporting gear 63. An installation groove 411 is formed in the supporting block 41. Four supporting gears 63 are arranged at the four corners of one side wall of the installation groove 411. The toothed belt 61 is wound around the four supporting gears 63. A servo motor 9 is installed in the installation groove 411. The driving gear 62 is fixedly installed on the output shaft of the servo motor 9. The driving gear 62 is engaged with the toothed belt 61. Driving racks 611 are fixedly connected to the four sides of the toothed belt 61. The driving racks 611 are engaged with the corresponding driven gears 72.

[0046] After the supporting block 41 slides to the cutting position of the aluminum profile, the servo motor 9 drives the driving gear 62 to rotate. The driving gear 62 drives the driving rack 611 to move through the transmission of the toothed belt 61. The driving rack 611 is engaged with the driven gear 72, converting linear motion into rotational motion. Due to the limiting effect of the positioning block 82 and the positioning groove 721, the rotation of the driven gear 72 drives the lifting rod 8 to rotate synchronously by 90 degrees, thereby realizing the attitude switching of the supporting wheel 5, changing it from the initial rolling fit state to the supporting state.

[0047] Refer to Figure 4 , Figure 5 and Figure 6 , a locking groove 73 is formed in the inner wall of the lifting groove 7. The locking member is set as a locking block 10. A connecting block 83 is fixedly connected to the lifting rod 8. A sliding groove 831 is formed in the connecting block 83. The locking block 10 is slidably engaged with the sliding groove 831. A contact spring 832 is arranged in the sliding groove 831. One end of the contact spring 832 is connected to the inner wall of the sliding groove 831, and the other end is connected to the locking block 10. A first wedge surface 101 is formed at the end of the locking block 10, and a second wedge surface 731 is formed on one side of the notch of the locking groove 73.

[0048] In the initial state, the locking block 10 is in a contracted state, and its end abuts against the inner wall of the lifting groove 7. When the driven gear 72 drives the lifting rod 8 to rotate by 90°, the locking block 10 rotates and moves to the position of the locking groove 73 synchronously with the lifting rod 8. At this time, the contact spring 832 pushes the locking block 10 into the locking groove 73. Through the insertion and engagement of the locking block 10 and the locking groove 73, the locking and limiting of the lifting action of the lifting rod 8 are realized, preventing the supporting wheel 5 from undergoing elastic displacement due to vibration during the cutting process.

[0049] After cutting is completed, the driven gear rotates in the reverse direction, and the lifting rod 8 rotates in reverse accordingly. The first wedge surface 101 of the locking block 10 interacts with the second wedge surface 731 of the locking groove 73. Under the guiding thrust of the wedge surface, the locking block 10 overcomes the elastic force of the abutting spring 832, disengages from the locking groove 73 and resets, releasing the limit on the lifting rod 8. At this time, the supporting wheel 5 switches back to rolling rotation so that the supporting block 41 can withdraw from the aluminum profile.

[0050] The implementation principle of an aluminum profile cutting device according to an embodiment of the present application is as follows: Place the aluminum profile on the supporting block 11, then move the positioning wheel 32 to abut against the side of the aluminum profile, and then move the two positioning plates 31 towards each other to drive the aluminum profile to move and abut against the end face of the aluminum profile to achieve the positioning of the aluminum profile; Move the supporting block 41 and insert it into the aluminum profile. During this process, the supporting wheel 5 rolls and cooperates with the inner wall of the aluminum profile. When the supporting block 41 moves to the cutting position, the servo motor drives the driving gear 62 to rotate. The driving gear 62 drives the toothed belt 61 to rotate. The toothed belt 61 drives the driving rack 611 to move. The driving rack 611 drives the driven gear 72 to rotate, and then drives the supporting wheel 5 to rotate 180 degrees. During the rotation process, the locking block 10 enters the locking groove 73 to lock the lifting action of the supporting wheel 5. Then, the saw blade 21 descends to achieve the cutting action of the aluminum profile; By supporting the aluminum profile with the supporting wheel 5, it helps to improve the flatness of the cutting end face of the aluminum profile.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An aluminum profile cutting device, characterized in that: It includes a base (1), a cutting assembly (2), a positioning assembly (3) and a support assembly (4). A supporting block (11) for supporting the aluminum profile is arranged in the middle of the base (1). The positioning assembly (3) includes two oppositely arranged positioning plates (31). The two positioning plates (31) slide towards each other to clamp the two ends of the aluminum profile. The support assembly (4) includes two support blocks (41) that slide in the directions of approaching and separating from each other. The support blocks (41) are inserted into and slidably engaged with the aluminum profile. The two support blocks (41) slide to the cutting position of the aluminum profile to support the cutting position of the aluminum profile. Support wheels (5) are rotatably connected to the circumferences of the support blocks (41), and the support wheels (5) elastically move up and down on the support blocks (41). A driving assembly (6) for driving the support wheels (5) to rotate by 90 degrees is arranged on the support blocks (41). The support blocks (41) are also provided with locking members for locking the lifting actions of the support wheels (5).

2. The aluminum profile cutting device according to claim 1, characterized in that: The cutting assembly (2) includes a saw blade (21) and a first lead screw slide (22) vertically arranged on the base (1). A driving motor is arranged on the slide of the first lead screw slide (22), and the driving motor drives the saw blade (21) to rotate.

3. An aluminum profile cutting device according to claim 1, characterized in that: The positioning assembly (3) further includes two groups of positioning wheels (32). Any group of positioning wheels (32) includes at least two positioning wheels (32). The two groups of positioning wheels (32) are distributed on both sides of the aluminum profile and slide in the directions of approaching and separating from the aluminum profile.

4. An aluminum profile cutting device according to claim 3, characterized in that: A second lead screw slide (12) is arranged on the base (1). The positioning plate (31) is arranged on the slide of the second lead screw slide (12). The positioning plate (31) is L-shaped, and an avoidance opening (311) for avoiding the support block (41) is formed in the vertical part of the positioning plate (31). A third lead screw slide (13) is also arranged on the base (1). The positioning wheel (32) is rotatably connected to the slide of the third lead screw slide (13), and the rotation axis of the positioning wheel (32) is vertical.

5. An aluminum profile cutting device according to claim 1, characterized in that: A long rod cylinder (14) is arranged on the base (1). The support block (41) is fixedly connected to the end of the piston rod of the long rod cylinder (14).

6. The aluminum profile cutting device according to claim 1, characterized in that: A lifting groove (7) is formed in the support block (41). A lifting rod (8) is slidably connected in the lifting groove (7). The support wheel (5) is rotatably connected to the end of the lifting rod (8). A compression spring (71) is installed on the bottom wall of the lifting groove (7). One end of the compression spring (71) is connected to the bottom wall of the lifting groove (7), and the other end of the compression spring (71) is connected to the end of the lifting rod (8).

7. An aluminum profile cutting device according to claim 6, characterized in that: A driven gear (72) is rotatably connected in the lifting groove (7). A positioning groove (721) is formed in the inner ring of the driven gear (72). A positioning block (82) is arranged on the circumferential side of the lifting rod (8). The lifting rod (8) is inserted and slidably matched with the driven gear (72), and the positioning block (82) is inserted and slidably matched with the positioning groove (721). The driving assembly (6) includes a toothed belt (61), a driving gear (62) and a supporting gear (63). An installation groove (411) is formed in the supporting block (41). Four supporting gears (63) are arranged at the four corners on one side wall of the installation groove (411). The toothed belt (61) is wound around all the supporting gears (63). The driving gear (62) is engaged with the toothed belt (61). A servo motor (9) for driving the driving gear (62) to rotate is installed in the installation groove (411). A driving rack (611) is fixedly connected to the toothed belt (61), and the driving rack (611) is engaged with the driven gear (72).

8. An aluminum profile cutting device according to claim 7, characterized in that: A locking groove (73) is formed in the inner wall of the lifting groove (7). The locking member is set as a locking block (10). A connecting block (83) is arranged on the lifting rod (8). A sliding groove (831) is formed in the connecting block (83). The locking block (10) is slidably matched with the sliding groove (831). A contact spring (832) is arranged in the locking groove (73). One end of the contact spring (832) is connected to the inner wall of the sliding groove (831), and the other end of the contact spring (832) is connected to the locking block (10). A first wedge surface (101) is formed at the end of the locking block (10), and a second wedge surface (731) is formed on one side of the notch of the locking groove (73).

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