Square tube aluminum profile cutting device with switchable clamping and transmission

Abstract

This invention relates to a square aluminum profile cutting device with switchable clamping and transmission capabilities. It includes: a table saw frame, a worktable mounted on the table saw frame, and a vertically adjustable circular saw mounted on the upper part of the worktable. It also includes a profile clamping device fixed to the worktable and multiple detachable transmission devices fixed to the profile clamping device. The transmission devices perform transmission, while the profile clamping devices perform clamping. During this process, the transmission devices switch from transmission to clamping, and simultaneously rotate at a certain angle to form an angle with the descending circular saw blade. This ensures that the cutting force is no longer directly applied to the plane of the square aluminum profile. This invention utilizes simultaneous rotation and linkage in two directions for clamping the profile, with only one power source. The circular saw can be easily controlled by setting a travel position switch, thus ensuring the reliability and safety of the clamping. It is economical, reliable, and easy to promote.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial processing, and in particular relates to a square tube aluminum profile cutting device with switchable clamping and transmission for square tube aluminum profiles. Background Art

[0002] The applicant's prior invention patent application announcement number: CN201911297727.X An aluminum miter saw bracket, as well as similar products, use a large amount of thin-walled square tube aluminum profiles as raw materials. The general national standard square tube aluminum profile is 6 meters long when it leaves the factory. It is cut according to the required length during use. Currently, circular saws are basically used. China's invention patent application publication number CN109663973A discloses a movable automatic circular saw for aluminum profiles, which improves the processing accuracy and quality of the cutting device, improves the degree of automation and production efficiency of the equipment, and is particularly suitable for cutting high-temperature thin aluminum profiles with a thickness of 0.3mm to 0.8mm. However, for aluminum profiles with a wall thickness of less than 4mm and a side length of more than 50, the upper plane will be concave to varying degrees during cutting. This situation is more likely to occur as the wall thickness is smaller, as shown in the attached Figure 6 As shown, this is due to the vertical effect of the saw blade's feed force on the plane of the aluminum profile during cutting. When the saw blade becomes old and blunt, the concave deformation will be aggravated, which will affect the subsequent welding or assembly processing and needs to be corrected.

[0003] On the other hand, in the cutting and unloading device, the feeding transmission device is independently set, relying on the dead weight of the material, and setting the driving force at the bottom for transmission. Such a transmission method that relies solely on dead weight is prone to deviation and slippage, affecting effective transmission, and realizes a separate transmission function. For example, a circular saw cutting copper and aluminum rod production line disclosed in Chinese invention patent application publication number CN110340440A has a transmission method designed in this way. Our company has summarized from practice and adopted different transmission methods to solve this problem.

[0004] Our company has previously had an invention patent authorization announcement number CN103252529B that disclosed an automatic pipe cutting machine, which solved the problems of material picking and pushing in the process of automatic cutting of long pipes. At present, based on this and combining the above-mentioned processing defects, our company's designers have once again proposed a new technical solution. Summary of the invention

[0005] In view of the above problems, the present invention provides a square tube aluminum profile cutting device with switchable clamping and transmission, which can effectively reduce deformation after cutting. The transmission part of the square tube adopts upper and lower contact with the square tube, and the transmission is realized by the upper drive, and the transmission part can provide clamping effect during cutting.

[0006] The invention objective of the present invention is achieved through the following technical solutions: A clamping and transmission switchable square tube aluminum profile cutting device, which comprises: a table saw frame, a workbench installed on the table saw frame, and a circular saw arranged on the upper part of the workbench and can be raised and lowered, and it also comprises a profile clamping device fixed on the workbench, and a plurality of transmission devices detachably fixed on the profile clamping device;

[0007] The transmission device performs transmission, and after the square tube aluminum profile is transmitted to the set length, the profile clamping device performs clamping. At this time, the transmission device switches from the transmission state to the clamping state, and while clamping, the profile clamping device rotates a certain angle by itself to form a certain angle with the saw blade of the descending circular saw, that is, the starting point of the saw blade cutting is turned to the intersection of the plane and facade of the square tube aluminum profile, so that the cutting force is no longer directly applied to the plane of the square tube aluminum profile.

[0008] Preferably, the transmission device is generally divided into a main part and an auxiliary part. The main part is a chain plate transmission component, and the transmission actuator is a chain plate structure made of hard rubber. On the one hand, the hard rubber material can ensure sufficient friction during transmission, and on the other hand, as a pressing part, the texture is softer than the profile and will not cause scratches on the profile surface.

[0009] As a preferred embodiment, the profile clamping device has two static working states: waiting to be transmitted and waiting to be cut. The two working states are switched by rotating each other. Its main structural parts include: a long fixed mold fixed on the worktable, a movable mold matched with the fixed mold, and the two are relatively rotatably connected to abut against the square tube aluminum profile, and a clamping assembly used to drive the movable mold to rotate and clamp the square tube aluminum profile at the same time. The clamping assembly drives the movable mold to rotate and clamps the aluminum profile at the same time. After the movable mold rotates with the aluminum profile, it forms an inclination angle with the saw blade, thereby realizing the position adjustment during cutting.

[0010] Preferably, a groove with an arc-shaped cross section is provided at the center of the fixed mold, and an arc-shaped cylindrical surface matching the groove is provided at the center of the movable mold. The two are pivotally connected at the outer ends by setting a hanging ear. The fixed mold is provided with an inclined surface facing outward, and the clamping assembly is provided on the side opposite to the inclined surface. The overall cross section of the movable mold is a semicircular with a missing corner, and the shape of the missing corner is a right angle. The two surfaces of the right angle are a standing surface and a flat surface. The design of the split fixed mold and movable mold is convenient for processing and later maintenance.

[0011] Preferably, the auxiliary part of the transmission device is installed in the flat surface, and a plurality of long strip installation grooves are provided in the flat surface. Partition plates are provided on both sides of the installation groove in the long direction, and a plurality of groups of mandrel installation holes are provided between the two partition plates. The auxiliary part is arranged in the flat surface to roll with the profile on the bottom surface, and the transmission wheel can also sink below the flat surface to not contact the profile, so that the auxiliary part does not affect the upper and lower clamping of the profile.

[0012] Preferably, the auxiliary part of the transmission device includes: a displaceable transmission wheel assembly sleeved in each group of mandrel mounting holes. The displaceable transmission wheel assembly is designed to achieve overall ascent and descent of the transmission wheel through displacement, so as to switch the transmission wheel to contact or separate from the bottom surface of the profile.

[0013] Preferably, the clamping assembly includes: a closed end hinged to two or more thrust cylinders below the work surface, one end hinged to the telescopic rod of the thrust cylinder, the middle hinged to the movable mold through a hinge seat, the other end is a free end for pressing the side contact piece of the square tube aluminum profile, and the upper contact piece that can slide relatively and fit the outer surface of the movable mold. The clamping assembly presses the profile from the side and top, and the traditional clamping generally only clamps from the side, so the technical solution of the present invention has better stability.

[0014] Preferably, both end faces of the upper abutment have an extension section extending toward the arc center, an arc groove is provided in the extension section, a notch with the same arc as the extension section is provided in the movable mold, a pin is provided in the notch to pass through the arc groove in the extension section, so that the two can fit tightly and slide without separation, and the position of the pin in the arc groove can be adjusted, specifically by screwing and fixing, and after loosening, the position is changed and fixed again by screwing; a connecting piece is provided at the upper end of the upper abutment, and the connecting piece is used to connect the main part of the transmission device, and a compression spring is provided at the lower end of the upper abutment. The clamping of the entire profile is rigid in the lateral direction, because the main resistance during cutting is in the lateral direction, and the upper and lower parts are only used as auxiliary pressing, and the main purpose of the upper and lower pressing is to reduce vibration, so it is set as elastic clamping.

[0015] As a preferred embodiment, a reset elastic member is hung on one side of the fixed mold opposite to the inclined surface, and the other end of the reset elastic member is hung below the hinge seat. The reset elastic member assists the cylinder in retracting and brings the movable mold back to its original position.

[0016] Preferably, the displaceable transmission wheel assembly includes a transmission wheel, a transmission wheel core shaft rotatably connected to the transmission wheel and exposed on both sides with a tapered end, and a reset spring sleeved on one side of the transmission wheel core shaft; the distal end of the transmission wheel core shaft on which the reset spring is installed is the touch end, and the taper of the exposed tapered parts on both sides of the transmission wheel core shaft is set in the same direction, and the diameter of the side away from the reset spring is relatively large and the diameter of the other side is relatively small. The principle of displacement is to use the position change of the tapered diameter to achieve the overall lifting of the transmission wheel after displacement, and to achieve displacement through the push and release of the reset spring and the touch end, so that the upper part is also clamped when clamped laterally, and the upper part is also loosened after the lateral release to return to the initial slight contact to only play the role of transmitting friction.

[0017] In summary, the present invention has the following advantages compared with the prior art:

[0018] The transmission device of the present invention can be switched to auxiliary clamping of profiles during transmission, and the profile clamping device can rotate together with the square tube aluminum profile to be cut. After rotation, the contact is through the entire long surface, and the contact area is large and the stability is good. Therefore, the overall clamping is a wrap-around clamp for the profile, and the cutting angle with the saw blade is also changed in the clamping state, that is, the starting point of the saw blade cutting is changed to the intersection of the plane and the vertical surface of the square tube aluminum profile. In this way, the cutting force is no longer directly applied to the plane of the square tube aluminum profile, thereby effectively reducing the concave deformation of the cutting surface.

[0019] In addition, the present invention utilizes rotation and simultaneous clamping in two directions to clamp the profile, and only one power source is used. With the reduction of components, the synchronization of clamping is enhanced, and a stroke position switch can be easily set to further control the start and stop of the circular saw, thereby ensuring the reliability of clamping and the safety of the circular saw when starting. The overall structure has been achieved through many practices, is economical and reliable, and is conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0023] Figure 4 It is a schematic diagram of a part of the structure of the present invention in a state to be cut;

[0024] Figure 5 It is an exploded view of the parts of the profile clamping device;

[0025] Figure 6 A schematic diagram of defects in prior art processing in the background art;

[0026] Figure 7 This is an exploded view of the parts of the profile clamping device from another perspective;

[0027] Figure 8 It is a schematic diagram of the structure of the profile clamping device when viewed from an oblique side angle from above;

[0028] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0029] Fig.10 for Figure 7 A partial enlarged view of point C in the middle.

[0030] Markings in the figure:

[0031] Square tube aluminum profile 001, hinge seat 002, mounting groove 003, partition 004, core shaft mounting hole 005, connecting beam 006, pin 007, hanging ear 01, table saw frame 100, workbench 200, circular saw 400, profile clamping device 500, fixed mold 510, movable mold 520, vertical support surface 521, flat surface 522, reset elastic member 523, clamping assembly 530, thrust cylinder 531, lateral resistance member 532, upper resistance member 533, connecting member 534, compression spring 535, transmission device 600, displaceable transmission wheel assembly 610, chain plate transmission assembly 620, chain plate structure 621, transmission wheel 611, transmission wheel core shaft 612, reset spring 613, touch end 614. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0033] Example 1

[0034] like Figure 1 As shown, a square tube aluminum profile cutting device with switchable clamping and transmission, based on the traditional feeding device, focuses on the following improvements: 1. Changing the cutting angle to reduce the concave deformation of the cutting surface; 2. The transmission part realizes two different functions of clamping or transmission after the cutting angle is converted; the rest such as the fixed length mechanism, the stacking mechanism, etc. are not within the scope of improvement, and the description is omitted. The main structure includes: a table saw frame 100, a workbench 200 installed on the table saw frame 100, a circular saw 400 arranged in the middle of the workbench and capable of being raised and lowered in a certain space on the upper part, a profile clamping device 500 symmetrically fixed on the workbench with the saw blade of the circular saw 400 as the center, and a plurality of transmission devices 600 detachably fixed on the profile clamping device 500.

[0035] When in use, the transmission device 600 performs transmission, and after the square tube aluminum profile is transmitted to the set length, the profile clamping device 500 performs clamping, and while clamping, the profile clamping device 500 automatically rotates a certain angle to form a certain angle with the saw blade of the descending circular saw 400, that is, the starting point of the saw blade cutting is turned to the intersection of the plane and the vertical surface of the square tube aluminum profile, so that the cutting force is no longer directly applied to the plane of the square tube aluminum profile, thereby effectively reducing the concave of the cutting plane;

[0036] like Figure 1 , Figure 3 , Figure 4 As shown, the transmission device 600 is generally divided into two parts: a main part and an auxiliary part. The main part is a chain plate transmission component 620, and the transmission actuator is a chain plate structure 621 made of hard rubber. Figure 4 , Figure 8As shown, the profile clamping device 500 has two static working states: ready for transmission and ready for cutting. The two working states are switched by rotating relative to each other. Figure 8 The profile clamping device 500 does not completely clamp the square tube aluminum profile 001, and is in a state of cooperating with the transmission device 600 to transmit the square tube aluminum profile 001; Figure 4 The profile clamping device 500 is in a state where the square tube aluminum profile 001 is clamped and the profile clamping device 500 itself is rotated and ready to be cut; its main structural parts are as follows Figure 7 The structure shown in the figure includes: a long strip fixed mold 510 fixed on the work surface, a movable mold 520 matched with the fixed mold 510 and connected to the fixed mold 510 so as to be relatively rotatable and used to abut against the square tube aluminum profile, and a clamping assembly 530 used to push the movable mold 520 to rotate and clamp the square tube aluminum profile at the same time;

[0037] Figure 7 As shown, a groove with an arc-shaped cross-section is provided at the center of the fixed mold 510, and an arc-shaped cylinder matching the groove is provided at the center of the movable mold 520. The two are pivotally connected at the outer ends by setting a hanging ear 01. The fixed mold 510 is provided with an inclined surface facing outward, and the space reserved above the inclined surface is used for the rotation space of the movable mold 520. The clamping assembly 530 is arranged on the side opposite to the inclined surface; the overall cross-section of the movable mold 520 is a semicircular with a missing corner, and the shape of the missing corner is a right angle. The two surfaces of the right angle are a vertical supporting surface 521 and a flat facing surface 522. The two working surfaces together form a backrest for the square tube aluminum profile, which is used for the square tube aluminum profile to abut when sliding or clamping.

[0038] The auxiliary part of the transmission device 600 is installed in the flat surface 522, such as Figure 8-9 As shown, a plurality of long strip-shaped installation grooves 003 are provided in the flat surface 522, and a partition plate 004 is provided on both sides of the installation groove 003 in the long direction, and a plurality of groups of mandrel installation holes 005 are arranged at intervals between the two partition plates 004; the auxiliary part of the transmission device 600 includes: a displaceable transmission wheel assembly 610 sleeved in each group of mandrel installation holes 005;

[0039] like Figure 2 , Figure 4 , Figure 7 As shown, the clamping assembly 530 includes: a closed end hinged to more than two thrust cylinders 531 below the work surface, one end hinged to the telescopic rod of the thrust cylinder 531, the middle hinged to the movable mold 520 through the hinge seat 002, the other end is a free end for pressing the other tube aluminum profile 532, and an upper resistance member 533 that can slide relatively and fit the outer surface of the movable mold 520;

[0040] like Figure 7As shown, both end faces of the upper abutment 533 have an extension section extending toward one side of the arc center, an arc groove is provided in the extension section, and a notch with the same arc as the extension section is provided in the movable mold 520, and a pin 007 is provided in the notch to pass through the arc groove in the extension section, so that the two can fit tightly and slide without separation. The position of the pin 007 in the arc groove can be adjusted, specifically by screwing and fixing it, and changing the position after loosening and fixing it again by screwing. This adjustment is to match the height of the profile; a connecting piece 534 is provided at the upper end of the upper abutment 533, and the connecting piece 534 is used to connect the transmission device The main part of the transmission device 600 is provided with a compression spring 535 at the lower end of the upper resistance piece 533. The compression spring 535 has two functions. One is that when the profile clamping device 500 is in the state of waiting for transmission, the compression spring 535 makes the main part of the transmission device 600 on the upper resistance piece 533 maintain appropriate friction pressure contact with the square tube aluminum profile; the other is that when the profile clamping device 500 is turned from the state of waiting for transmission to the state of waiting for cutting, the square tube aluminum profile flips upward, and the compression spring 535 is greatly compressed to push the driven pressure piece 533 in the opposite direction to form a complete compression between the main part of the transmission device 600 and the square tube aluminum profile; Figure 7 As shown, each lateral resistance member 532 is combined together by setting a connecting beam 006, so that relatively few cylinders can complete the driving and ensure the synchronization of the action.

[0041] The opposite side of the inclined surface in the fixed mold 510 is connected to a reset elastic member 523, and the other end of the reset elastic member 523 is connected below the hinge seat 002. The reset elastic member 523 causes the thrust cylinder 531 to retract and then drives the movable mold 520 to reset.

[0042] like Figure 9-10 As shown, the displaceable transmission wheel assembly 610 includes: a transmission wheel 611, a transmission wheel spindle 612, a return spring 613, and a touch end 614;

[0043] The transmission wheel core shaft 612 is rotatably connected to the transmission wheel 611 and is exposed on both sides and has a conical end. The reset spring 613 is sleeved on one side of the transmission wheel core shaft 612; the far end of the side where the reset spring is installed on the transmission wheel core shaft 612 is the touch end 614, and the tapers of the exposed conical parts on both sides of the transmission wheel core shaft 612 are set in the same direction, and the diameter of the side away from the reset spring 613 is relatively large, and the diameter of the other side is relatively small;

[0044] After installation, the tapered parts at both ends of the transmission wheel mandrel 612 are respectively inserted into the mandrel installation hole 005 on one side, see Fig. 9, the transmission wheel 611 falls into the mounting groove 003 with a certain position displacement along the axial direction of the core shaft mounting hole 005, and the reset spring 613 is provided with a countersunk hole for accommodation at the position corresponding to each core shaft mounting hole 005 on the side away from the vertical support surface 521 in the movable mold 520, and part of the reset spring 613 and the touch end 614 are exposed to the countersunk hole. At this time, the contact between the tapered parts at both ends of the transmission wheel core shaft 612 and the core shaft mounting hole 005 is the diameter tending to the small end, and the central axis of the transmission wheel 611 is lowered relative to the central axis of the core shaft mounting hole 005. That is, the overall height of the transmission wheel 611 is reduced, and the transmission wheel 611 is set to a maximum height slightly lower than the upper surface of the mounting groove 003. In this way, when the profile is in the state of being cut in the clamping device 500, the transmission wheel 611 does not contact the bottom surface of the square tube aluminum profile, and its clamping is not affected;

[0045] When the external force is removed, under the elastic force of the return spring 613, the contact between the tapered parts at both ends of the transmission wheel mandrel 612 and the mandrel mounting hole 005 changes to a larger diameter end. At this time, the overall height of the transmission wheel 611, which is opposite to the above, is increased, and the increase is higher than the upper surface of the mounting groove 003. In this way, when the profile clamping device 500 is in the waiting state, it switches to the function of assisting the chain plate transmission assembly 620 to move and transmit the square tube aluminum profile. Here, the force applied to the touch end 614 is in conflict with the connecting beam 006, so that when the lateral conflicting member 532 performs the clamping action, the transmission wheel 611 can be triggered synchronously to move, realizing the function of assisting transmission.

[0046] Cutting process simulation:

[0047] 1. Figure 1 As shown, the square tube aluminum profile 001 enters the workpiece profile clamping device 500 through the external transmission device. Here, the workpiece profile clamping device 500 is first preset with a height matching the square tube aluminum profile 001. Figure 2 This is accomplished by limiting the position of the pin 007 shown in FIG.

[0048] 2. Figure 1As shown, the square tube aluminum profile 001 continues to move forward through the transmission device 600. After reaching the set position (or the position set by the fixed length mechanism), the thrust cylinder 531 is actuated, driving the lateral abutment 532 to move until it abuts against the side wall of the square tube aluminum profile 001. The thrust cylinder 531 continues to move upward, pushing the movable mold 520 to overcome the elastic force of the reset elastic member 523 and rotate. At the same time, the upper wall of the square tube aluminum profile 001 presses against the chain plate transmission assembly 620 to make it overcome the elastic force of the compression spring 535 and rotate together with the upper abutment 533. At the same time, the connecting beam 006 also abuts against the touch end 614, so that the movable transmission wheel assembly 610 moves forward, and the transmission wheel 611 descends until the movable mold 520 is completely fitted with the inclined surface of the fixed mold 510. At this time, the square tube aluminum profile 001 is clamped on both the side and the top surface.

[0049] 3. Figure 4 As shown, the square tube aluminum profile 001 has formed an inclination angle. After the circular saw 400 is started to complete the cutting, the thrust cylinder 531 retracts and the movable mold 520 is reset; the stacking mechanism collects the cut aluminum profiles.

[0050] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A square tube aluminum profile cutting device with switchable clamping and transmission, comprising: A table saw frame (100), a workbench (200) mounted on the table saw frame (100), and a circular saw (400) arranged on the upper part of the workbench and capable of being raised and lowered, characterized in that: It also includes a profile clamping device (500) fixed on the workbench, and a plurality of transmission devices (600) detachably fixed on the profile clamping device (500); The transmission device (600) performs transmission, and after the square tube aluminum profile is transmitted to a set length, the profile clamping device (500) performs clamping. At this time, the transmission device (600) switches from the transmission state to the clamping state, and while clamping, the profile clamping device (500) automatically rotates a certain angle to form a certain angle with the saw blade of the descending circular saw (400), that is, the starting point of the saw blade cutting is turned to the intersection of the plane and the vertical surface of the square tube aluminum profile, so that the cutting force no longer acts directly on the plane of the square tube aluminum profile; The transmission device (600) is generally divided into two parts: a main part and an auxiliary part. The main part is a chain plate transmission component (620), and the transmission actuator is a chain plate structure (621) made of hard rubber. The profile clamping device (500) has two static working states, namely, ready to be transferred and ready to be cut. The two working states are switched by rotating relative to each other. Its main structural parts include: a long strip-shaped fixed die (510) fixed on a work surface, a movable die (520) matched with the fixed die (510) and connected to the fixed die (510) so as to be relatively rotatable and used to abut against the square tube aluminum profile, and a clamping assembly (530) used to push the movable die (520) to rotate and clamp the square tube aluminum profile at the same time. The fixed mold (510) is provided with a groove with an arc-shaped cross section at the center, and the movable mold (520) is provided with an arc-shaped cylindrical surface matching the groove at the center. The two are pivotally connected at the outer ends by arranging a hanging ear (01). The fixed mold (510) is provided with an inclined surface facing outward, and the clamping assembly (530) is arranged on the side opposite to the inclined surface. The movable mold (520) has an overall cross section of a semicircular with a missing corner, and the shape of the missing corner is a right angle. The two surfaces of the right angle are a standing surface (521) and a flat surface (522).

2. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 1 is characterized in that: The auxiliary part of the transmission device (600) is installed in the flat surface (522), and a plurality of long strip installation grooves (003) are provided in the flat surface (522). Partition plates (004) are provided on both sides of the installation grooves (003) in the long direction, and a plurality of groups of core shaft installation holes (005) are arranged at intervals between the two partition plates (004).

3. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 2 is characterized in that: The auxiliary part of the transmission device (600) comprises: a displaceable transmission wheel assembly (610) sleeved in each group of spindle mounting holes (005).

4. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 1 is characterized in that: The clamping assembly (530) comprises: a closed end hinged to more than two thrust cylinders (531) below the work surface, one end hinged to a telescopic rod of the thrust cylinder (531), the middle hinged to the movable mold (520) via a hinge seat (002), the other end being a free end, a lateral resistance member (532) for pressing the other tube aluminum profile, and an upper resistance member (533) that is relatively slidable and fits on the outer surface of the movable mold (520).

5. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 4 is characterized in that: Both end surfaces of the upper resistance member (533) have an extension section extending toward one side of the arc center, an arc groove is provided in the extension section, and a notch with the same arc as the extension section is provided in the movable mold (520), and a pin (007) is provided in the notch to pass through the arc groove in the extension section, so that the two can fit tightly and slide without separation, and the position of the pin (007) in the arc groove can be adjusted, specifically, it is fixed by screwing, and after loosening, the position is changed and fixed again by screwing; the upper end of the upper resistance member (533) is provided with a connecting member (534), and the connecting member (534) is used to connect the main part of the transmission device (600), and the lower end of the upper resistance member (533) is provided with a compression spring (535).

6. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 4 is characterized in that: The opposite side of the inclined surface in the fixed mold (510) is hung with a resetting elastic member (523), and the other end of the resetting elastic member (523) is hung below the hinge seat (002).

7. The square tube aluminum profile cutting device with switchable clamping and transmission according to claim 3 is characterized in that: The displaceable transmission wheel assembly (610) comprises a transmission wheel (611), a transmission wheel core shaft (612) rotatably connected to the transmission wheel (611), the transmission wheel core shaft (612) having two sides exposed and a conical end, and a return spring (613) sleeved on one side of the transmission wheel core shaft (612); the far end of the transmission wheel core shaft (612) on which the return spring is mounted is a trigger end (614), and the tapered portions exposed on both sides of the transmission wheel core shaft (612) are arranged in the same direction, with the diameter of the side away from the return spring (613) being relatively larger and the diameter of the other side being relatively smaller.

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