A continuous alternating draw machine for extruded aluminium sections

Abstract

The application discloses a continuous and alternating traction machine for reverse extrusion aluminum profiles, relates to the aluminum profile traction technical field, and is based on a guide rail support, a material conveying support, two traction head assemblies and a saw bench assembly as a basic operation unit. In the traction head assembly, an arc-shaped clamping block and a material supporting rotary table with a horizontal part and a gradually changing arc-shaped part are key structures. The material supporting rotary table is provided with eccentric driving structures such as a rotating shaft, a telescopic air rod and the like. The operation of the equipment is divided into forward traction, variable speed cutting and variable speed traction stages. Through the adaptive clamping of the arc-shaped clamping block and the material supporting rotary table, combined with the dynamic adjustment of the traction speed and the rotating angle / direction of the material supporting rotary table, the accurate and alternating operation of the two traction head assemblies is realized. Meanwhile, the axial eccentricity and the arc-shaped adaptive structure of the material supporting rotary table are used to offset the shaking impact force in the instant of profile cutting, the stable and high-precision continuous traction of the reverse extrusion aluminum profiles, especially the thin-walled profiles, is realized, and the straightness of the products and the overall machining precision are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile traction technology, and specifically to a continuous alternating traction machine for reverse-extruded aluminum profiles. Background Technology

[0002] The key differences between aluminum profile traction machines and straightening machines include: the former is used in the extrusion molding process, while the latter is used in the finishing process during the extrusion cooling stage; secondly, the forces applied by the two are different, the former requires the application of dynamic synchronous traction force (which needs to match the extrusion speed), while the latter mainly applies static tensile force (to cause plastic deformation of the material). Refer to the assembly line involved in publication numbers CN101850377A and CN109226318A, where two traction heads alternately run on corresponding guide rails to complete the transfer of aluminum material; Regarding the dynamic traction force in the dual-traction head (continuous alternating traction method), the following points are added: First, referring to the technical content of publication number CN113245392A, two traction heads are used in conjunction with an electric saw to continuously traction the aluminum profile. Under the action of traction head P1, the aluminum profile needs to be completely coordinated with the extrusion speed to control the traction speed. After reaching a certain length, the aluminum profile is cut at a certain length using an electric saw, and traction continues through traction head P2. Meanwhile, traction head P1 continues to traction the cut aluminum profile for directional movement, and this process is repeated alternately. It should be noted that when the two traction units switch alternately, the reversal time under the traditional control method increases with the traction speed, causing the profile to lose stable traction force at the moment of switching. Profiles in a high-temperature plastic state are prone to bending and twisting, especially for thin-walled reverse-extrusion profiles, which significantly increases the risk of deformation and affects the straightness of the product. Secondly, there is the problem of swaying that may occur in the aluminum profile during the traction process, especially at the moment of cutting. This not only affects the traction force / speed between the traction head and the aluminum profile, but also exacerbates the swaying problem, leading to the risk of localized impact on the aluminum profile. This invention proposes a solution to this problem. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous alternating traction machine for reverse extrusion aluminum profiles. During the process of traction of aluminum profiles by dual traction heads, it is necessary to consider that at the moment when the dual traction heads switch traction modes, on the one hand, the difference in traction force / speed will cause local deformation of the profile in the high temperature plastic state, and on the other hand, it will also affect the swaying problem and aggravate the risk of profile deformation.

[0004] The objective of this invention can be achieved through the following technical solution: a continuous alternating traction machine for reverse extrusion aluminum profiles, comprising a guide rail support, a material conveying support, and a traction head assembly and a saw table assembly disposed in the guide rail support and the material conveying support. The number of traction head assemblies is two, and each includes an axial drive assembly, a rotating support arm assembly, and a motor assembly. Arc-shaped clamps and material-supporting turntables are respectively provided along the rotating support arm assembly and the motor assembly. The material-supporting turntables are respectively provided with a horizontal part and a gradually curved part along the traction direction of the aluminum profile. The arc-shaped clamps cooperate with the material-supporting turntables to complete the fixing action of the aluminum profile. The aluminum profile that has completed the fixing action is driven by the axial drive assembly to move alternately and directionally on the material conveying bracket. During the alternating movement, the traction speed of the traction head assembly, the rotation angle and rotation direction of the material-supporting turntable are adjusted according to the extrusion speed of the aluminum profile.

[0005] The configuration is further defined as follows: the arc-shaped clamping block and the material-supporting turntable rotate in a directional manner along the traction direction of the aluminum profile via the motor assembly, and the bending direction of the arc-shaped clamping block and the setting direction of the gradually curved part in the material-supporting turntable correspond to the traction direction of the aluminum profile.

[0006] The following configuration is further provided: an action shaft is provided at the rotation point of the material support turntable and the motor assembly, and the center point of the action shaft is not collinear with the center point of the gradient arc section.

[0007] The following configuration is further provided: the material support turntable has a long shaft through groove inside, corresponding to the length direction of the action shaft. The cross-section of the long shaft through groove is rectangular, and the groove width is equal to the outer diameter of the action shaft. Telescopic air rods are symmetrically installed in the long shaft through groove in the radial up and down direction, and the end of the telescopic air rod is connected to the inner wall of the long shaft through groove.

[0008] The further configuration is as follows: one end of the actuating shaft extends to the outside of the rotating arm assembly, and an air pump interface is provided at this end. When the material support turntable rotates in a directional manner through the motor assembly, the actuating shaft performs an axial eccentric movement through the air pump interface.

[0009] The continuous alternating traction machine is further configured to include a forward traction stage, a variable speed cutting stage, and a variable speed traction stage during operation. The two traction head assemblies are marked as P1 and P2 respectively along the traction direction of the aluminum profile. In the forward traction stage, the aluminum profile is clamped and fixed by the arc-shaped clamping block in P1 and the horizontal part in the material support turntable and is directionally conveyed on the material conveying bracket. The axial drive assembly moves axially in coordination with the basic speed of the aluminum profile. After completing the forward traction stage, the variable speed cutting stage and variable speed traction stage are entered simultaneously, with the variable speed cutting stage preceding the variable speed traction stage. In the variable speed cutting stage, the aluminum profile is cut by the saw table assembly. During the cutting of the aluminum profile, the material support turntable in P2 rotates in a directional manner and moves axially out of center. First, the gradually curved part of the material support turntable, together with the arc-shaped clamping block, completes the clamping and fixing of the aluminum profile and directional conveying on the material conveying bracket. During the directional conveying of the aluminum profile by P2, the material support turntable resets and restores the clamping and fixing method of the aluminum profile by the horizontal part of the material support turntable and the arc-shaped clamping block. During the process of P2 driving the directional conveying of aluminum profiles, P1 resets and re-enters the variable speed cutting stage and variable speed traction stage, and repeats the variable speed cutting stage and variable speed traction stage in this way.

[0010] Further configuration: During the variable speed cutting stage, adjust the traction speed of the traction head assembly, the rotation angle and rotation direction of the material support turntable according to the extrusion speed of the aluminum profile.

[0011] The present invention has the following beneficial effects: 1. Through the cyclical alternation design of the dual traction head assembly, combined with the control method of dynamically adjusting the traction speed, material support turntable rotation angle and rotation direction according to the real-time extrusion speed of the aluminum profile, the reversal time in the traditional traction head switching process is eliminated. This ensures that the aluminum profile in the high-temperature plastic state is always under stable dynamic traction force throughout the cutting and traction switching process, fundamentally solving the bending and twisting problem caused by the loss of traction force in the profile. This significantly improves the straightness of the thin-walled reverse extruded aluminum profile and meets the process requirements of high-speed extrusion production. 2. Relying on the switchable clamping structure of the horizontal part and the gradually curved part of the material support turntable, combined with the axial eccentric action of the action shaft and the pneumatic buffer design of the telescopic air rod, at the moment of cutting the aluminum profile, the wrapping fixation of the gradually curved part that matches the swaying trend of the profile can effectively offset the swaying impact force generated by cutting, and realize the instantaneous stabilization of the profile. At the same time, the buffer holding connection of the telescopic air rod can avoid hard contact between the material support turntable and the profile when resetting, which not only reduces the risk of local deformation of the profile, but also prevents scratches on the surface of the profile, and significantly improves the processing accuracy and surface quality of the reverse extruded aluminum profile. 3. The use of arc-shaped clamping blocks and surface contact clamping with the material support turntable significantly increases the contact area with the aluminum profile compared to traditional point / line clamping. This effectively avoids the problem of local stress concentration during traction, prevents local plastic deformation of the aluminum profile in a high-temperature plastic state, and provides a more uniform stress state for the profile, further ensuring the stability of the aluminum profile traction process and improving the overall product qualification rate. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a continuous alternating traction machine for reverse-extruded aluminum profiles proposed in this invention; Figure 2This is a schematic diagram of the traction head assembly in this invention; Figure 3 For the present invention Figure 2 The front view; Figure 4 This is a cross-sectional view of the material-supporting turntable in this invention; Figure 5 This is a schematic diagram of the movement of the material-supporting turntable relative to the arc-shaped clamping block in this invention.

[0014] In the diagram: 1. Guide rail bracket; 2. Traction head assembly; 201. Axial drive assembly; 202. Rotary arm assembly; 203. Motor assembly; 3. Saw table assembly; 4. Material conveying bracket; 5. Arc-shaped clamp; 6. Material support turntable; 7. Action shaft; 8. Telescopic air rod. Detailed Implementation

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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 the present invention.

[0016] Example 1: In the production process of reverse extrusion aluminum profiles, the traction machine, as the core equipment of the extrusion molding process, mainly works with the aluminum extruder to provide a traction force that dynamically matches the extrusion speed for the aluminum profiles in a high-temperature plastic state. Unlike the static tensile force applied by the straightening machine in the finishing stage, the core principle of the existing dual traction head continuous alternating traction technology is as follows: two traction heads (or more traction heads) are set up to alternately complete the traction and fixed-length cutting of the aluminum profile. One traction head (such as P1) completes directional traction in conjunction with the aluminum profile extrusion speed. When the profile reaches the preset length, the saw table assembly performs the cutting action, and the other traction head (such as P2) continues to pull the newly extruded profile. At the same time, the cut profile is continued to be transported by the original traction head, thereby realizing continuous production. It is important to note that the traction head needs to be equipped with a directional movement structure, such as a vertical guiding mechanism that moves the clamping structure (e.g., the arc-shaped clamping block 5 below) up and down, and two linear guiding mechanisms along the conveying direction and perpendicular to the conveying direction. Most of these are based on stepper motors, primarily to avoid positional interference when clamping aluminum materials. Figure 1 For example, assuming head P1 is pulling aluminum, head P2 needs to be moved upwards appropriately to avoid blocking the aluminum's path. When it's time to cut the aluminum, head P2 moves to the corresponding position and then adjusts itself vertically or horizontally to the set position without affecting the normal movement of the aluminum. Therefore, the setup methods for the two pulling heads are different. Figure 1One of the traction heads is a suspended guide rail, and the other is a conventional tooling table guide rail; The processing of thin-walled reverse-extruded aluminum profiles suffers from significant technical defects. Firstly, during the alternating switching of dual traction heads, the reversal time in traditional control methods increases with traction speed, causing the profile to lose stable traction force at the moment of switching. This can be understood as follows: during the sawing process, the aluminum profile needs to be in a "passively stationary" state to ensure a clean cut. However, the extruder cannot "forcefully change its extrusion speed" in conjunction with the traction process. Therefore, while the aluminum profile is being sawed "passively stationary," the extruder continues to extrude the aluminum profile, making the thin-walled profile in a high-temperature plastic state highly susceptible to bending and twisting, severely affecting the straightness of the product. Secondly, the aluminum profile experiences significant wobbling at the moment of cutting. This wobbling not only disrupts the dynamic matching of traction force and speed between the traction head and the profile but also exacerbates the risk of localized deformation of the profile, reducing product processing accuracy. To address these issues, the technical solution presented in this invention is proposed: This invention proposes a continuous alternating traction machine for reverse-extruded aluminum profiles. The machine is based on a guide rail support 1 and a material conveying support 4, and is configured with two traction head assemblies 2 and a saw table assembly 3 as basic working units. The traction head assembly 2 integrates an axial drive assembly, a rotating support arm assembly, and a motor assembly. An adaptive profile clamping structure is formed by setting an arc-shaped clamping block in the rotating support arm assembly and a material-supporting turntable with a horizontal section and a gradually curved section in the motor assembly. Simultaneously, an action shaft, a telescopic air rod, and an axial eccentric drive structure are designed at the material-supporting turntable. In conjunction with the cutting action of the saw table assembly, the machine operation is divided into three stages: forward traction, variable-speed cutting, and variable-speed traction. This achieves precise alternating operation of the two traction head assemblies. By dynamically adjusting the traction speed, the rotation angle and direction of the material-supporting turntable, and the shape of the clamping structure, the problems of long traction head switching time, loss of stable traction force in the profile, and increased deformation due to shaking during cutting in existing technologies are solved. This achieves stable and high-precision continuous traction of reverse-extruded aluminum profiles, especially thin-walled profiles.

[0017] Example 2: This example, in conjunction with the structural design of each core component in Example 1, details the complete operation process of the continuous alternating traction machine for reverse-extruded aluminum profiles of the present invention, as described below: The core working components of the traction machine of this invention are two identical traction head assemblies (labeled P1 and P2), each equipped with an axial drive assembly 201, a rotating arm assembly 202, and a motor assembly 203. The arc-shaped clamping block 5 on the rotating arm assembly 202 and the material-supporting turntable 6 on the motor assembly 203 form a profile clamping engagement. The material-supporting turntable 6 has a long shaft through groove adapted to the actuating rotating shaft 7, and telescopic air rods 8 are radially symmetrically installed within the groove. (Refer to...) Figure 4 and Figure 5Explanation: Essentially, the width of the long shaft through groove is just right to match the outer diameter of the actuating shaft 7. However, it needs to meet the eccentric rotation process generated by the subsequent telescopic air rod 8, so that its groove length is greater than the sum of the outer diameter of the actuating shaft 7 and the movement of the telescopic air rod 8. The actuating shaft 7 extends to the outside of the rotating arm assembly 202 and has an air pump interface, which can realize axial eccentric movement. Moreover, the center of the actuating shaft 7 is not on the same line as the center of the gradually curved part of the material support turntable 6, which provides a structural basis for the adaptive adjustment of the clamping structure. The saw table assembly 3 is set at the working connection position of the two traction head assemblies to complete the fixed-length cutting of the profile. It should be added that this embodiment mainly improves the aluminum material transmission process, but cannot interfere with the operation of the aluminum extruder (the key is the aluminum material extrusion speed / quantity). During operation, the forward traction stage begins: the P1 traction head assembly performs the main traction operation, and the motor assembly 203 drives the arc-shaped clamping block 5 to maintain the initial clamping state with the material support turntable 6. That is, the horizontal part of the material support turntable 6 is in contact with the arc-shaped clamping block 5, forming a surface contact clamping and fixing of the newly extruded high-temperature plastic aluminum profile. This clamping method increases the contact area with the profile, avoids local stress concentration caused by point / line clamping, and effectively prevents local deformation of the profile in the initial traction stage. At the same time, the axial drive assembly 201 moves synchronously axially according to the basic extrusion speed of the aluminum profile, providing a stable dynamic traction force for the profile, ensuring the speed matching between profile extrusion and traction, and avoiding profile bending and stretching deformation caused by speed difference from the source. This part is also the basic working process of the current extrusion traction machine. Once the aluminum profile is pulled to the preset length, the equipment simultaneously enters the variable speed cutting stage and the variable speed traction stage, with the variable speed cutting stage starting first. This stage is the core alternating operation of the equipment. The saw table assembly 3 starts and performs a fixed-length cutting action on the aluminum profile. At the moment of cutting, the profile is prone to shaking. At this time, the motor assembly 203 of the P2 traction head assembly immediately drives the material support turntable 6 to perform a directional rotation action. Essentially, it uses the material support turntable 6 and the arc-shaped clamping block 5 to complete the initial clamping. The key point is that at the same time, the air pump applies an axial eccentric driving force to it through the air pump interface of the rotating shaft 7. Platform 6 rotates and shifts around the actuating axis 7, and its gradually curved section quickly engages with the curved clamping block 5 to form a new clamping structure. Because the curvature of the gradually curved section matches the swaying tendency of the profile during cutting, and the actuating axis 7 and the center of the gradually curved section are not collinear, this clamping method can adaptively wrap and fix the swaying profile, offsetting the swaying impact force generated during cutting and achieving instantaneous profile stabilization. This solves the core problem of increased deformation due to swaying during cutting in existing technologies. However, its key feature lies in this process: firstly, the P2 traction head can adaptively change the traction speed to... Figure 3 and Figure 5For example, when the material support turntable 6 rotates clockwise, the relative horizontal height of the gradually curved part will be slightly higher than that of the conventional horizontal part. The purpose is to change the traction trajectory of the aluminum profile under high temperature plastic forming. Specifically, the aluminum profile forming gradually moves upward in an "uphill motion trend". The purpose is to use the rotation angle of the material support turntable 6, the adaptability speed change of the traction head assembly 2, and the preset base speed of the aluminum profile in the extruder to avoid stress concentration and deformation of the aluminum profile in local positions due to the difference in traction speed during the sawing process. It should also be added that: refer again Figure 4 and Figure 5 The rotating shaft 7 is not collinear with the running point of the gradually curved section. Its purpose is to change the pumping volume of the telescopic air rod 8 to cause the material-supporting turntable 6 to rotate upwards or downwards along the linear direction of the telescopic air rod 8 during its rotation. This aims to change the relative height of the gradually curved section / horizontal section. Figure 5 For example, if the material-supporting turntable 6 rotates clockwise, but the overall material-supporting turntable 6 tends to move downwards under the action of the telescopic air rod 8, then the actual "horizontal height" of the gradually curved section will not be higher than the horizontal section. Alternatively, the linear movement direction / linear movement distance of the telescopic air rod 8 relative to the material-supporting turntable 6 can be changed, thereby altering the relative height difference between the gradually curved section and the initial horizontal section. (Refer to...) Figure 5 The material support turntable 6, represented by the dashed and solid lines, is explained as follows: The solid line portion indicates the initial position, while the dashed line portion indicates the relative position after angular deflection and linear movement. The deflection direction / angle and linear movement stroke are determined based on the actual situation. Figure 5 The material support turntable 6 in the dotted line section is not the only position during the angle deflection action; it is also used to stabilize the high-temperature plastic aluminum profile and assist the differential traction process during the sawing process, and it can also have a pneumatic buffering function. Meanwhile, during the variable speed cutting stage, the equipment dynamically adjusts the traction speed of the P2 traction head assembly, the rotation angle and rotation direction of the material support turntable 6 according to the real-time extrusion speed of the aluminum profile, ensuring dynamic matching between the traction force and the extrusion speed, so that the profile is always under stable traction force during the cutting and switching of traction heads, avoiding the problem of losing traction force at the moment of switching in the existing technology. After the P2 traction head assembly completes the clamping of the profile with the gradually curved part and the arc-shaped clamping block 5 and directionally conveys it on the material conveying bracket 4, the material support turntable 6 returns to center along the long axis through groove under the reset action of the telescopic air rod 8, and restores the clamping mode of the horizontal part and the arc-shaped clamping block 5. This reset action is smooth and without impact. The buffer holding connection of the telescopic air rod 8 can avoid hard contact between the material support turntable 6 and the profile when reset, preventing scratches and secondary deformation of the profile surface. At the same time, the surface contact clamping of the horizontal part restores the stable force state of conventional traction, ensuring the accuracy of the subsequent traction process.

[0018] After the P2 traction head assembly completes the follow-up traction and resumes the normal clamping mode, the variable speed traction stage enters a stable operating state. At this time, the P1 traction head assembly completes the conveying operation of the cut profile and quickly resets under the coordinated action of the motor assembly 203, the axial drive component 201 and the telescopic air rod 8, waiting for the next variable speed cutting and traction operation command. This realizes the cyclical alternation of the P1 and P2 traction head assemblies in the variable speed cutting stage and the variable speed traction stage, and completes the continuous traction processing of the reverse extruded aluminum profile. The linear movement direction / linear movement distance of the telescopic air rod 8, the rotation state (direction and angle) of the material support turntable 6, and the conversion process between the traction speeds of the two traction head assemblies can be controlled by the PLC control system. The specific calculation process is not described in detail in this embodiment. This invention achieves three key technical effects through the coordinated operation of the aforementioned components: First, the alternating operation design of the traction head assembly 2, combined with dynamic adjustments to speed, rotation angle, and rotation direction, eliminates the switching time of the traction head in existing technologies, ensuring that the aluminum profile is always under stable dynamic traction force. This solves the problem of bending and twisting of high-temperature plastic profiles due to loss of traction force, and significantly improves the straightness of thin-walled reverse-extruded profiles. Second, the switching clamping of the horizontal part and the gradually curved part of the material support turntable 6, combined with the axial eccentric action and the buffer design of the telescopic air rod 8, achieves stable posture and adaptive fixation at the moment of profile cutting, offsetting the impact force of cutting sway and reducing the risk of local deformation of the profile. Third, the surface contact clamping design between the arc-shaped clamping block 5 and the material support turntable 6 avoids local stress concentration, prevents surface scratches and local plastic deformation during profile traction, and improves the overall processing accuracy and product quality of reverse-extruded aluminum profiles.

[0019] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the scope of the present invention.

[0020] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous alternating traction machine for reverse-extruded aluminum profiles, comprising a guide rail support (1), a material conveying support (4), a traction head assembly (2) disposed in the guide rail support (1), and a saw table assembly (3) disposed in the material conveying support (4), characterized in that, The number of traction head assemblies (2) is two, including an axial drive assembly (201), a rotary arm assembly (202), and a motor assembly (203). The arc-shaped clamping block (5) on the rotating arm assembly (202) and the material support turntable (6) on the motor assembly (203) form a profile clamping cooperation. The material support turntable (6) is provided with a horizontal part and a gradually curved part along the traction direction of the aluminum profile. The arc-shaped clamping block (5) cooperates with the material support turntable (6) to complete the fixing action of the aluminum profile. The aluminum profile is driven to move alternately in a direction on the material conveying bracket (4) through the axial drive assembly (201). During the alternate movement, the traction speed of the traction head assembly (2), the rotation angle and rotation direction of the material support turntable (6) are adjusted according to the extrusion speed of the aluminum profile. The arc-shaped clamp (5) and the material support turntable (6) rotate in a directional manner along the aluminum profile traction direction via the motor assembly (203), and the bending direction of the arc-shaped clamp (5) and the setting direction of the gradually curved part in the material support turntable (6) correspond to the aluminum profile traction direction. The rotating point of the material support turntable (6) and the motor assembly (203) is provided with an action shaft (7), and the action shaft (7) is not collinear with the center of the gradual arc section; The material support turntable (6) has a long shaft through groove inside that corresponds to the length direction of the action shaft (7). The cross-section of the long shaft through groove is rectangular, and the groove width is equal to the outer diameter of the action shaft (7). Telescopic air rods (8) are symmetrically installed in the long shaft through groove along the radial up and down direction. The end of the telescopic air rod (8) is connected to the inner wall of the long shaft through groove. One end of the actuating shaft (7) extends to the outside of the rotating arm assembly (202), and an air pump interface is provided at this end. When the material support turntable (6) rotates in a directional manner through the motor assembly (203), it performs an axial eccentric movement to the actuating shaft (7) through the air pump interface. The continuous alternating traction machine includes a forward traction stage, a variable speed cutting stage and a variable speed traction stage during operation. The two traction head assemblies (2) are marked as P1 and P2 respectively along the aluminum profile traction direction. In the forward traction stage, the aluminum profile is clamped and fixed by the arc-shaped clamp (5) in P1 and the horizontal part of the material support turntable (6) and directionally conveyed on the material conveying bracket (4). The axial drive assembly (201) moves axially in coordination with the basic speed of the aluminum profile. After completing the forward traction stage, the variable speed cutting stage and variable speed traction stage are entered simultaneously. The variable speed cutting stage is carried out before the variable speed traction stage. In the variable speed cutting stage, the aluminum profile is cut by the saw table assembly (3). During the process of cutting the aluminum profile, the material support turntable (6) in P2 performs directional rotation and axial eccentric action. First, the gradually curved part in the material support turntable (6) cooperates with the arc-shaped clamp (5) to complete the clamping and fixing of the aluminum profile and directional conveying on the material conveying bracket (4). During the process of P2 driving the directional conveying of the aluminum profile, the material support turntable (6) is reset and the clamping and fixing method of the aluminum profile by the horizontal part in the material support turntable (6) and the arc-shaped clamp (5) is restored. During the process of P2 driving the directional conveying of aluminum profiles, P1 resets and re-enters the variable speed cutting stage and variable speed traction stage, and repeats the variable speed cutting stage and variable speed traction stage in this way.

2. The continuous alternating traction machine for reverse-extruded aluminum profiles according to claim 1, characterized in that, During the variable speed cutting stage, the traction speed of the traction head assembly (2), the rotation angle and rotation direction of the material support turntable (6) are adjusted according to the extrusion speed of the aluminum profile.

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