Cutting positioning auxiliary device and method for aluminum alloy door and window frame

Abstract

The invention discloses a cutting and positioning auxiliary device and method for an aluminum alloy door and window frame, and relates to the technical field of aluminum alloy section cutting, the device comprises a cutting seat, two parallel first guide rails and an inclined rail forming a 45-degree included angle with the first guide rails are arranged on the upper portion of the cutting seat, and a rotating groove is further formed in the cutting seat; the number of the clamp mechanisms is two, the clamp mechanisms are arranged in the two first guide rails in a sliding mode respectively, and the two clamp mechanisms are fixedly connected through a U-shaped connecting handle. The distance measuring mechanism is fixedly arranged on one of the clamp mechanisms and comprises a U-shaped fixed plate fixedly arranged on the clamp mechanism; the sliding plate is slidably arranged at one end of the fixing plate, and a U-shaped plate is fixedly arranged on the side, close to the clamp mechanism, of the sliding plate; and through cooperation of the hydraulic telescopic rod and the pull rod, automatic reset of the sliding baffle and the sliding plate is achieved, it is ensured that the measuring benchmark is consistent before cutting every time, and it is ensured that high-precision positioning and measuring can be achieved before cutting every time.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy profile cutting technology, specifically to a cutting and positioning auxiliary device and method for aluminum alloy door and window frames. Background Technology

[0002] In the manufacturing process of aluminum alloy doors and windows, the cutting accuracy and efficiency of profiles directly affect the quality of the finished product and production costs. Traditional cutting equipment mostly uses fixed-angle cutting methods. If multi-angle cutting (such as 90° and 45°) is required, the clamps must be changed or the clamping position adjusted, which is cumbersome and prone to introducing errors. In addition, the positioning of existing equipment mostly relies on manual measurement or mechanical limits, which has limited accuracy and cannot meet the needs of cutting complex profiles with varying lengths. Although some automated equipment uses servo motors or optical measurement systems, they are expensive and complex to maintain, making them difficult to popularize in small and medium-sized enterprises.

[0003] Therefore, it is necessary to provide a cutting and positioning auxiliary device and method for aluminum alloy door and window frames to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a cutting and positioning auxiliary device for aluminum alloy door and window frames, comprising: a cutting seat, on which two parallel guide rails and a slanted rail at a 45° angle to the guide rails are provided on the upper part, and a rotating groove is also provided on the cutting seat; two clamping mechanisms are configured and slidably disposed in the two guide rails respectively, and the two clamping mechanisms are fixedly connected by a U-shaped connecting handle; a ranging mechanism is fixedly disposed on one of the clamping mechanisms, comprising: a fixing plate, which is U-shaped and fixedly disposed on the clamping mechanism; a sliding plate, which is slidably disposed at one end of the fixing plate, and a U-shaped plate is fixedly disposed on the side of the sliding plate close to the clamping mechanism; a sliding baffle, which is slidably disposed on the U-shaped plate; a hydraulic telescopic rod, whose two ends are fixedly connected to the sliding plate and the clamping mechanism respectively; and a cutting mechanism, comprising: a turntable, which is rotatably disposed in the rotating groove; and a cutting blade, which is rotatably disposed on the turntable, and whose cutting direction is radially toward the turntable.

[0005] Preferably, the turntable is provided with two guide rails II, a deflector rail I, and a deflector rail II. The two guide rails II are rotatable and can connect with the two guide rails I. The deflector rail I includes a straight rail I and a straight rail II, and the deflector rail II includes a straight rail III and a straight rail IV. The intersection of the straight rail I and the straight rail II and the intersection of the straight rail III and the straight rail IV are located on the same radial line of the turntable. The straight rail I and the straight rail III are parallel and of equal length. The straight rail I and the straight rail III are rotatable and can connect with the two guide rails I respectively. The straight rail II, the straight rail IV, and the guide rail II are parallel. The straight rail IV is rotatable and can connect with the inclined rail.

[0006] Preferably, the clamping mechanism includes a fixed base, a backrest plate, and a clamping plate. A slide rod is fixedly provided at the bottom of the fixed base and slides along the guide rail. The backrest plate is fixedly provided on the fixed base. The clamping plate is slidably provided on the fixed base, and a hydraulic cylinder for driving the clamping plate to slide is fixedly provided on the fixed base.

[0007] Preferably, the cutting seat has two guide grooves, a driving block is slidably disposed in the guide grooves, a driving rod is fixedly connected between the two driving blocks, and the driving rod is slidably connected to the U-shaped connecting handle.

[0008] Preferably, the U-shaped plate has slots on both sides along its length; a rectangular box is fixedly installed at the bottom of the sliding baffle, and ear plates are fixedly installed on both sides of the rectangular box. The ear plates are slidably installed along the slots. A rotating shaft is rotatably installed in the rectangular box. A gear one is fixedly installed on the rotating shaft, and a gear two is rotatably installed on the rotating shaft. A ratchet mechanism is provided between the gear two and the rotating shaft. The gear one and the gear two are the same size.

[0009] Preferably, a rack with its teeth facing upward is fixedly provided at the bottom of the fixing plate along its length direction, and the gear one meshes with the rack one; a rack with its teeth facing downward is provided on the side of the U-shaped plate near the rack one along its length direction, and the gear two meshes with the rack two.

[0010] Preferably, an electromagnetic brake for locking the rotating shaft is fixedly installed in the rectangular box, and an encoder is also installed in the rectangular box, with the output shaft of the encoder fixedly connected to the rotating shaft.

[0011] Preferably, the fixed plate has symmetrical sliding cavities on both sides along its length, and the sliding cavity penetrates the fixed plate near one end of the slide plate. An L-shaped pull rod is slidably disposed in the sliding cavity, and the sliding baffle can push the pull rod to slide.

[0012] A cutting and positioning method for aluminum alloy door and window frames includes the following steps:

[0013] S1. Place the aluminum alloy profile to be cut onto the two clamping mechanisms, and make one end of the profile fit against the sliding baffle.

[0014] S2. Push the profile to slide and drive the sliding baffle to slide. The sliding baffle further drives the first gear to roll along the first rack and the second gear to roll along the second rack, thereby driving the rotating shaft to rotate.

[0015] S3. The encoder detects the rotation angle of the shaft, and the linear movement distance of the profile is calculated by combining the pitch circle circumference of gear one and gear two.

[0016] S4. When the profile moves to the set cutting position, the electromagnetic brake is activated to lock the rotating shaft, and then the clamping plate is driven by the hydraulic cylinder to slide and clamp the profile.

[0017] S5. Drive the turntable to rotate according to the cutting angle of the profile, push the two clamping mechanisms to slide, and push the profile to the cutting blade for cutting;

[0018] S6. After cutting, push the two clamping mechanisms to reset and slide, release the clamping mechanisms and remove the profile, then drive the pull rod to reset and slide so that the sliding baffle resets and slides, and pull the slide plate to reset and slide through the hydraulic telescopic rod;

[0019] S7. Repeat steps S1 to S6 until all cutting operations are completed.

[0020] Compared with the prior art, the present invention provides a cutting and positioning auxiliary device and method for aluminum alloy door and window frames, which has the following beneficial effects:

[0021] First, the design of the second guide rail, the first direction-changing rail, and the second direction-changing rail on the turntable in this invention enables rapid switching between two cutting angles of 90° and 45° without the need to change the fixture or re-clamp the profile, thus significantly improving processing efficiency.

[0022] Secondly, the ranging mechanism uses gear-rack meshing, encoder and electromagnetic brake to accurately measure and lock the displacement of the profile, ensuring accurate cutting position and achieving high-precision positioning and measurement.

[0023] Third, the two clamping mechanisms are linked by a U-shaped connecting handle and a drive rod to ensure that the profile moves in parallel during the cutting process, avoiding skewing and further ensuring the accuracy of the cutting.

[0024] Fourth, the automatic reset of the sliding baffle and slide plate is achieved through the cooperation of the hydraulic telescopic rod and the pull rod, ensuring that the measurement benchmark is consistent before each cut and that high-precision positioning and measurement can be achieved before each cut. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the cutting seat in this invention;

[0027] Figure 3 This is a schematic diagram of the cutting mechanism in this invention;

[0028] Figure 4 This is a schematic diagram of the ranging mechanism in this invention;

[0029] Figure 5 This is a schematic diagram of the skateboard structure in this invention;

[0030] Figure 6 This is a schematic diagram of the sliding baffle in this invention;

[0031] Figure 7 This is a schematic diagram illustrating the rotation of the cutting mechanism in this invention;

[0032] In the diagram: 1. Cutting seat; 11. Guide rail one; 12. Inclined rail; 13. Rotating groove; 14. Guide groove; 15. Drive block; 16. Drive rod; 2. Clamping mechanism; 21. U-shaped connecting handle; 22. Fixed seat; 23. Backrest plate; 24. Clamping plate; 3. Distance measuring mechanism; 31. Fixed plate; 311. Rack one; 312. Pull rod; 32. Slide plate; 321. U-shaped plate; 322. Slot; 323. Rack two; 33. Sliding baffle 331. Rectangular box; 332. Ear plate; 333. Rotating shaft; 334. Gear 1; 335. Gear 2; 336. Electromagnetic brake; 337. Encoder; 34. Hydraulic telescopic rod; 4. Cutting mechanism; 41. Turntable; 411. Guide rail 2; 412. Directional rail 1; 413. Directional rail 2; 414. Straight rail 1; 415. Straight rail 2; 416. Straight rail 3; 417. Straight rail 4; 418. Guide plate; 42. Cutting blade. Detailed Implementation

[0033] Please see Figures 1 to 7 In this embodiment of the invention, a cutting and positioning auxiliary device for aluminum alloy door and window frames includes: a cutting base 1, which has two parallel guide rails 11 and a slanted rail 12 at a 45° angle to the guide rails 11 on its upper part, and a rotating groove 13 is also provided on the cutting base 1; two clamping mechanisms 2 are configured and slidably disposed in the two guide rails 11 respectively, and the two clamping mechanisms 2 are fixedly connected by a U-shaped connecting handle 21; and a ranging mechanism 3 is fixedly disposed on one of the clamping mechanisms 2, which includes: a fixing plate 31, which is U-shaped and fixedly disposed on the clamping mechanism 2;

[0034] A sliding plate 32 is slidably disposed on one end of the fixed plate 31, and a U-shaped plate 321 is fixedly disposed on the side of the sliding plate 321 near the clamping mechanism 2; a sliding baffle 33 is slidably disposed on the U-shaped plate 321; a hydraulic telescopic rod 34 is fixedly connected at both ends to the sliding plate 32 and the clamping mechanism 2 respectively; a cutting mechanism 4 includes: a turntable 41, which is rotatably disposed in the rotating groove 13, and its rotational power comes from an external driving mechanism, such as a gear ring mechanism, a worm gear and a hydraulic driving mechanism; and a cutting blade 42, which is rotatably disposed on the turntable 41, and its cutting direction is radial towards the turntable 41.

[0035] In this embodiment, the turntable 41 is provided with two guide rails 411, a deflector rail 412, and a deflector rail 413. The two guide rails 411 can rotate and connect with the two guide rails 11. The deflector rail 1 412 includes a straight rail 414 and a straight rail 415. The deflector rail 2 413 includes a straight rail 3 416 and a straight rail 417. The intersection of the straight rail 1 414 and the straight rail 2 415 and the intersection of the straight rail 3 416 and the straight rail 417 are located on the same radial line of the turntable 41. The straight rail 1 414 and the straight rail 3 416 are parallel and of equal length. The straight rail 1 414 and the straight rail 3 416 can rotate and connect with the two guide rails 11 respectively. The straight rails 415, the straight rail 417, and the guide rail 2 411 are arranged in parallel. The straight rail 417 can rotate and connect with the inclined rail 12.

[0036] It is important to note that, such as Figure 7As shown, the first guide rail 412 and the second guide rail 413 are two rails with corners. When a 90° cut is required on the profile, the turntable 41 is rotated so that the two guide rails 411 align with the first guide rail 11. Then, the clamping mechanism 2 is driven to slide and move the profile to the cutting blade 42 for cutting. When a 45° cut is required on the profile, the turntable 41 is driven to rotate so that the first straight rail 414 and the third straight rail 416 align with the two guide rails 11. During this process, the turntable 41 will rotate. At 45°, the rotation of turntable 41 will cause the cutting blade 42 to rotate together. After rotation, since straight rail 1 414 and straight rail 3 416 are of equal length, the guide rods in the two clamping mechanisms 2 will slide into straight rail 2 415 and straight rail 417 respectively. Then, under the action of straight rail 2 415 and straight rail 417, the two guide rods will slide obliquely relative to the cutting seat 1. The cutting direction of the cutting blade 42 is also oblique, thus cutting the profile at 45°. This is achieved through the simple sliding of turntable 41 and the specially designed guide rail 2 411. The first and second guide rails 412 and 413 can drive the profile to slide along a fixed cutting trajectory and cut at different angles. In particular, the first and second guide rails 412 and 413 on the turntable 41 and the inclined rail 12 on the cutting seat 1 can be set as track modules to generate different deflection angles, such as 30° and 60°, thereby cutting the profile at more angles and enhancing its versatility. In addition, the third straight rail 416 and one of the guide rails 411 have an overlapping part, resulting in a gap in this overlapping part. To ensure that the guide rod can slide accurately along the third straight rail 416 or the second guide rail 411, two pairs of guide plates 418 can be slidably set at the gap. The two pairs of guide plates 418 are parallel to the third straight rail 416 and the second guide rail 411, respectively. During cutting, the corresponding guide plates 418 can be driven to slide as needed to fill the gap in the third straight rail 416 or the second guide rail 411, thereby ensuring the normal sliding of the guide rod.

[0037] In this embodiment, the clamping mechanism 2 includes a fixed base 22, a backrest plate 23, and a clamping plate 24. A slide rod is fixedly provided at the bottom of the fixed base 22, and the slide rod is slidably provided along the guide rail 11. The backrest plate 23 is fixedly provided on the fixed base 22, and the clamping plate 24 is slidably provided on the fixed base 22. A hydraulic cylinder for driving the clamping plate 24 to slide is fixedly provided on the fixed base 22.

[0038] In this embodiment, the cutting seat 1 is provided with two guide grooves 14, and a driving block 15 is slidably disposed in the guide groove 14. A driving rod 16 is fixedly connected between the two driving blocks 15. The driving rod 16 is slidably connected to the U-shaped connecting handle 21. That is to say, the driving rod 16 always remains parallel to the cutting seat 1 when it slides. Therefore, the two clamping mechanisms 2 slide simultaneously when they slide, and the corresponding profile slides parallel to the cutting seat 1. When the profile is cut at 45°, that is, when the two clamping mechanisms 2 slide obliquely, the U-shaped connecting handle 21 will slide along the driving rod 16, thereby ensuring that the two clamping mechanisms 2 can drive the profile to slide obliquely and complete the oblique cutting work.

[0039] In addition, there are several ways to drive the drive block 15 along the guide groove 14. For example, a lead screw is rotatably set in the guide groove 14, and a nut that cooperates with the lead screw is set on the drive block 15. The drive block 15 slides along the guide groove 14 by driving the lead screw to rotate. Alternatively, a multi-stage telescopic rod is set between the drive block 15 and the end wall of the guide groove 14, and the drive block 15 is driven to slide along the guide groove 14 by the telescopic rod.

[0040] In this embodiment, slots 322 are provided on both sides of the U-shaped plate 321 along its length direction;

[0041] A rectangular box 331 is fixedly installed at the bottom of the sliding baffle 33. Ear plates 332 are fixedly installed on both sides of the rectangular box 331. The ear plates 332 are slidably installed along the slot 322. A rotating shaft 333 is rotatably installed in the rectangular box 331. A gear 1 334 is fixedly installed on the rotating shaft 333, and a gear 2 335 is rotatably installed on the rotating shaft 333. A ratchet mechanism is provided between the gear 2 335 and the rotating shaft 333. The gear 1 334 and the gear 2 335 are the same size.

[0042] In implementation, gear 334 and gear 335 can be regarded as a guide wheel, and this guide wheel does not slip. That is, the number of rotations of the guide wheel corresponds accurately to its displacement, thereby ensuring that the encoder 337 can accurately detect the displacement distance of the profile and ensure the accuracy of the clamping position and the cutting position.

[0043] In this embodiment, a rack 311 with its toothed surface facing upward is fixedly provided at the bottom of the fixing plate 31 along its length direction, and the gear 334 meshes with the rack 311; a rack 323 with its toothed surface facing downward is provided on the side of the U-shaped plate 321 near the rack 311 along its length direction, and the gear 335 meshes with the rack 323.

[0044] In this embodiment, an electromagnetic brake 336 for locking the rotating shaft 333 is fixedly installed in the rectangular box 331, and an encoder 337 is also installed in the rectangular box 331, with the output shaft of the encoder 337 fixedly connected to the rotating shaft 333.

[0045] In this embodiment, sliding cavities are symmetrically formed on both sides of the fixing plate 31 along its length direction, and the sliding cavity penetrates the fixing plate 31 at one end near the sliding plate 32. An L-shaped pull rod 312 is slidably disposed in the sliding cavity, and the sliding baffle 33 can push the pull rod 312 to slide.

[0046] A cutting and positioning method for aluminum alloy door and window frames includes the following steps:

[0047] S1. Place the aluminum alloy profile to be cut onto the two clamping mechanisms 2, and make one end of the profile fit against the sliding baffle 33;

[0048] S2. Push the profile to slide and drive the sliding baffle 33 to slide. The sliding baffle 33 further drives the gear 1 334 to roll along the rack 1 311 and the gear 2 335 to roll along the rack 2 323, thereby driving the rotating shaft 333 to rotate.

[0049] Specifically, since the tooth surfaces of rack 1 311 and rack 2 323 face opposite directions, the rotation of gear 1 334 is opposite to the rotation of gear 2 335. Since gear 1 334 is fixedly connected to shaft 333, when gear 1 334 meshes with rack 1 311, shaft 333 will definitely rotate. At this time, gear 2 335 will rotate relative to shaft 333 under the action of the ratchet mechanism. That is, the rotation of gear 1 334 will not drive gear 2 335 to rotate. In other words, in the initial state, sliding baffle 33 is located near the end of clamping mechanism 2, and gear 1 334 and gear 2 335 are meshed with rack 1 311 and rack 2 323 respectively. When the profile pushes sliding baffle 33 to slide, gear 1 334 will roll along rack 1 311 and drive shaft 333 to rotate, while gear 2 335... The sliding baffle 33 and rack 323 will be locked under the action of the ratchet mechanism, that is, the sliding baffle 33, U-shaped plate 321 and slide plate 32 will be locked. At this time, the sliding baffle 33 will slide and drive the slide plate 32 to slide together. Then, when the gear 334 disengages from the rack 311, the locking state between the sliding baffle 33 and U-shaped plate 321 is broken. The gear 335 will roll along the rack 323 under the action of the ratchet mechanism and drive the rotating shaft 333 and the gear 334 to rotate in the opposite direction. At this time, the slide plate 32 just slides to the farthest distance of the fixed plate 31. Therefore, the sliding baffle 33 slides along the U-shaped plate 321 and pulls the pull rod 312 to slide. Then, when the profile moves to the cutting position, the electromagnetic brake 336 will lock the rotating shaft 333, so that the rotating shaft 333 will no longer rotate, that is, the sliding baffle 33 will no longer slide.

[0050] S3. The rotation angle of the rotating shaft 333 is detected by the encoder 337, and the linear movement distance of the profile is calculated by combining the pitch circle circumference of the first gear 334 and the second gear 335.

[0051] It should be noted that since gear 1 334 and gear 2 335 drive the rotating shaft 333 to rotate in two directions, the encoder 337 adopts a dual-channel incremental encoder, which can realize bidirectional detection during the rotation of the rotating shaft 333.

[0052] S4. When the profile moves to the set cutting position, the electromagnetic brake 336 is activated to lock the rotating shaft 333, and then the clamping plate 24 is driven by the hydraulic cylinder to slide and clamp the profile.

[0053] S5. Drive the turntable 41 to rotate according to the cutting angle of the profile, push the two clamping mechanisms 2 to slide, and push the profile to the cutting blade 42 for cutting;

[0054] S6. After cutting, push the two clamping mechanisms 2 to reset and slide, release the clamping mechanisms 2 and remove the profile, then drive the pull rod 312 to reset and slide, so that the sliding baffle 33 resets and slides, and pull the slide plate 32 to reset and slide through the hydraulic telescopic rod 34. It should be noted that during the reset process of the sliding baffle 33 and the slide plate 32, first drive the pull rod 312 to reset and slide, so that the pull rod 312 drives the sliding baffle 33 to slide to the end of the U-shaped plate 321 away from the slide plate 32. At this time, the gear 1 334 will re-mesh with the rack 1 311, and then the gear 2 335 and the rack 2 323 will lock again under the action of the ratchet mechanism, that is, the sliding baffle 33 will lock with the slide plate 32. At this time, when the slide plate 32 is pulled by the hydraulic telescopic rod 34, it will drive the sliding baffle 33 to slide together, so that the sliding baffle 33 and the slide plate 32 can be reset to the initial position, thereby ensuring that the displacement of the profile is accurately calculated before each cutting operation, and further ensuring the accuracy of the cutting operation.

[0055] S7. Repeat steps S1 to S6 until all cutting operations are completed.

[0056] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting and positioning auxiliary device for aluminum alloy door and window frames, characterized in that, include: The cutting seat (1) has two parallel guide rails (11) and a slanted rail (12) at a 45° angle to the guide rails (11) on its upper part. The cutting seat (1) also has a rotating groove (13). Two clamping mechanisms (2) are configured and slidably disposed in the two guide rails (11), and the two clamping mechanisms (2) are fixedly connected by a U-shaped connecting handle (21); A ranging mechanism (3), which is fixedly mounted on one of the clamping mechanisms (2), includes: A fixing plate (31) is U-shaped and fixedly mounted on the clamping mechanism (2); A sliding plate (32) is slidably disposed at one end of the fixed plate (31), and a U-shaped plate (321) is fixedly disposed on the side of the plate close to the clamping mechanism (2); A sliding baffle (33) is slidably disposed on the U-shaped plate (321); A hydraulic telescopic rod (34) is fixedly connected at both ends to the slide plate (32) and the clamping mechanism (2); Cutting mechanism (4), comprising: A turntable (41) is rotatably disposed in the rotating groove (13); A cutting blade (42) is rotatably mounted on the turntable (41), and its cutting direction is radial towards the turntable (41).

2. The cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 1, characterized in that, The turntable (41) is provided with two guide rails (411), a deflector rail (412) and a deflector rail (413). The two guide rails (411) can rotate and connect with the two guide rails (11). The first deflection rail (412) includes a straight rail (414) and a straight rail (415). The second deflection rail (413) includes a straight rail (416) and a straight rail (417). The intersection of the straight rail (414) and the straight rail (415) and the intersection of the straight rail (3) and the straight rail (417) are located on the same radial line of the turntable (41). The straight rail (414) and the straight rail (416) are parallel and of equal length. The straight rail (414) and the straight rail (416) can rotate and connect with the two guide rails (11) respectively. The straight rail (415), the straight rail (417) and the guide rail (411) are parallel. The straight rail (417) can rotate and connect with the inclined rail (12).

3. The cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 1, characterized in that, The clamping mechanism (2) includes a fixed base (22), a backrest plate (23) and a clamping plate (24). A slide rod is fixedly provided at the bottom of the fixed base (22). The slide rod is slidably provided along the guide rail (11). The backrest plate (23) is fixedly provided on the fixed base (22). The clamping plate (24) is slidably provided on the fixed base (22). A hydraulic cylinder for driving the clamping plate (24) to slide is fixedly provided on the fixed base (22).

4. The cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 1, characterized in that, The cutting seat (1) has two guide grooves (14), and a driving block (15) is slidably arranged in the guide groove (14). A driving rod (16) is fixedly connected between the two driving blocks (15), and the driving rod (16) is slidably connected to the U-shaped connecting handle (21).

5. A cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 3, characterized in that, The U-shaped plate (321) has slots (322) on both sides along its length; A rectangular box (331) is fixedly installed at the bottom of the sliding baffle (33). Ear plates (332) are fixedly installed on both sides of the rectangular box (331). The ear plates (332) are slidably installed along the slot (322). A rotating shaft (333) is rotatably installed in the rectangular box (331). A gear one (334) is fixedly installed on the rotating shaft (333), and a gear two (335) is rotatably installed on the rotating shaft (333). A ratchet mechanism is provided between the gear two (335) and the rotating shaft (333). The gear one (334) and the gear two (335) are the same size.

6. The cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 5, characterized in that, The bottom of the fixing plate (31) is fixedly provided with a rack (311) with the tooth surface facing upward, and the gear (334) meshes with the rack (311); The U-shaped plate (321) has a rack two (323) with its tooth surface facing downward on the side near the rack one (311) along its length direction, and the gear two (335) meshes with the rack two (323).

7. A cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 6, characterized in that, An electromagnetic brake (336) for locking the rotating shaft (333) is fixedly installed in the rectangular box (331). An encoder (337) is also installed in the rectangular box (331), and the output shaft of the encoder (337) is fixedly connected to the rotating shaft (333).

8. A cutting and positioning auxiliary device for aluminum alloy door and window frames according to claim 7, characterized in that, The fixed plate (31) has symmetrical sliding cavities on both sides along its length direction, and the sliding cavity penetrates the fixed plate (31) to one end near the sliding plate (32). An L-shaped pull rod (312) is slidably disposed in the sliding cavity, and the sliding baffle (33) can push the pull rod (312) to slide.

9. A cutting and positioning method for aluminum alloy door and window frames, comprising using a cutting and positioning auxiliary device for aluminum alloy door and window frames as described in claim 8, characterized in that, Includes the following steps: S1. Place the aluminum alloy profile to be cut onto the two clamping mechanisms (2) and make one end of the profile fit against the sliding baffle (33); S2. Push the profile to slide and drive the sliding baffle (33) to slide. The sliding baffle (33) further drives the gear one (334) to roll along the rack one (311) and the gear two (335) to roll along the rack two (323), thereby driving the rotating shaft (333) to rotate. S3. The rotation angle of the rotating shaft (333) is detected by the encoder (337), and the linear movement distance of the profile is calculated by combining the pitch circle circumference of the first gear (334) and the second gear (335). S4. When the profile moves to the set cutting position, the electromagnetic brake (336) is activated to lock the rotating shaft (333), and then the clamping plate (24) is driven by the hydraulic cylinder to slide and clamp the profile. S5. Drive the turntable (41) to rotate according to the cutting angle of the profile, push the two clamping mechanisms (2) to slide, and push the profile to the cutting blade (42) for cutting; S6. After the cutting is completed, push the two clamping mechanisms (2) to reset and slide, release the clamping mechanism (2) and remove the profile, then drive the pull rod (312) to reset and slide so that the sliding baffle (33) resets and slides, and pull the slide plate (32) to reset and slide through the hydraulic telescopic rod (34); S7. Repeat steps S1 to S6 until all cutting operations are completed.

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