A cutting device for plastic steel door and window profile machining capable of multiple group cutting

Abstract

The application relates to the plastic steel profile machining technical field and discloses a plastic steel door and window profile machining cutting device capable of carrying out multiple-group cutting, which comprises a cutting machine workbench, the top of the cutting machine workbench is respectively fixedly connected with a clamping air cylinder and a lifting air cylinder, the top end of the lifting air cylinder is fixedly connected with an electric guide rail, and the outer surface of the electric guide rail is slidably connected with an electric sliding frame; the inside of the electric sliding frame is slidably connected with a cutting machine shell, the inside of the cutting machine shell is rotationally connected with a rotating shaft, and the circumferential outer surface of the rotating shaft is fixedly connected with a cutting saw blade. The plastic steel door and window profile machining cutting device capable of carrying out multiple-group cutting can effectively solve the problem in the prior art that, along with the long-term use of the cutting saw blade, the friction can cause the hard alloy material of the saw blade tooth tip to gradually wear, the worn tooth tip is difficult to effectively cut the profile material, burrs are easily generated, the flatness of the profile cut is reduced, and the difficulty of subsequent door and window frame and sash splicing alignment is increased.

Description

Technical Field

[0001] This invention relates to the field of PVC profile processing technology, specifically to a cutting device for processing PVC door and window profiles capable of multiple cuts. Background Technology

[0002] Plastic steel profiles, also known as PVC profiles, are a type of building material widely used due to their excellent physical properties such as rigidity, elasticity, corrosion resistance, and aging resistance. They are often used as a substitute for non-ferrous metals such as copper, zinc, and aluminum. In building construction, they are mainly used for doors, windows, railings, pipes, and ceiling materials. During the processing of plastic steel door and window profiles, CNC cutting equipment is usually used to cut the profiles to the specified length to ensure that the geometric dimensions of the door and window frames meet the design specifications.

[0003] Currently, in the cutting process of PVC window and door profiles, a rotating cutting saw blade is usually used to cut the PVC window and door profiles. The saw blade teeth rub against the profile surface quickly and generate a lot of heat. With long-term use of the cutting saw blade, the friction will cause the carbide material of the saw blade teeth to wear down gradually. The worn teeth are difficult to cut the profile material effectively and are prone to producing burrs, thereby reducing the flatness of the profile cut and increasing the difficulty of alignment when splicing the window and door frames. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a cutting device for processing PVC window and door profiles that can perform multiple cuts, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a cutting device for processing PVC window and door profiles capable of multiple cuts, comprising: A cutting machine workbench, wherein a clamping cylinder and a lifting cylinder are fixedly connected to the top of the cutting machine workbench respectively, an electric guide rail is fixedly connected to the top of the lifting cylinder, and an electric sliding frame is slidably connected to the outer surface of the electric guide rail. The electric sliding frame is slidably connected to a cutting machine housing, and a rotating shaft is rotatably connected to the inside of the cutting machine housing. A cutting saw blade is fixedly connected to the outer circumference of the rotating shaft. A drive motor is fixedly connected to the outer surface of the cutting machine housing, and the output shaft of the drive motor is fixedly connected to the rotating shaft. A lifting groove is provided on the outer surface of the electric sliding frame, and a lifting wheel is rotatably connected to the outer surface of the cutting machine housing. The lifting wheel is slidably connected inside the lifting groove.

[0006] Furthermore, a top wheel is rotatably connected to the top of the cutting machine housing, and an upper flat rail, a lower flat rail, and a lifting inclined rail are provided inside the electric guide rail, with the top wheel slidably connected inside the upper flat rail.

[0007] Furthermore, a trapezoidal telescopic frame is slidably connected inside the electric guide rail, and a first spring is fixedly connected between the trapezoidal telescopic frame and the electric guide rail.

[0008] Furthermore, the cutting saw blade includes a fixed blade, which is fixedly connected to the outer circumference of the rotating shaft. A fixed cutting head is fixedly connected to the outer surface of the fixed blade. A telescopic blade is slidably connected inside the fixed blade. A telescopic cutting head is fixedly connected to the outer surface of the telescopic blade. An adjusting ring is rotatably connected to the outer circumference of the rotating shaft. An adjusting groove is formed on the outer surface of the adjusting ring. The telescopic blade is slidably connected to the adjusting groove.

[0009] Furthermore, a push-pull wheel is rotatably connected to the outer surface of the telescopic blade, and a turning ring is rotatably connected to the outer circumference of the rotating shaft. A turning guide rail is provided inside the turning ring, and the push-pull wheel is slidably connected inside the turning guide rail.

[0010] Furthermore, the actuating guide rail includes a central arc rail, an inner arc rail, an outer arc rail, and a connecting inclined rail, and the push-pull wheel is slidably connected inside the central arc rail.

[0011] Furthermore, a gear ring is fixedly connected to the outer surface of the actuating ring, a gear is rotatably connected to the inner wall of the cutting machine housing, the gear meshes with the gear ring, a rotating block is rotatably connected to the outer surface of the cutting machine housing, the rotating block is fixedly connected to the gear, a connecting rod is rotatably connected to the outer surface of the rotating block, a lifting rod is rotatably connected to the top of the connecting rod, a lifting rail is fixedly connected to the outer surface of the cutting machine housing, and the lifting rod is slidably connected to the lifting rail.

[0012] Furthermore, a support rod is slidably connected to the outer surface of the electric sliding frame, a locking block is fixedly connected to the bottom end of the support rod, a second spring is fixedly connected between the support rod and the electric sliding frame, and a protruding strip is fixedly connected to the outer surface of the electric guide rail.

[0013] Furthermore, a slide block is fixedly connected to the outer surface of the electric slide frame, and the support rod is slidably connected to the electric slide frame through the slide block.

[0014] Furthermore, a pawl is rotatably connected to the inner wall of the gear ring, and a ratchet is fixedly connected to the outer circumferential surface of the rotating shaft.

[0015] The technical solution provided by this invention has the following advantages compared with the prior art: 1. This invention controls the electric sliding frame to slide back and forth along the outer surface of the electric guide rail, so that the rotating cutting saw blade first cuts the upper half of the PVC profile at a higher height, and then cuts the lower half of the PVC profile at a lower height. After the upper half is cut, the saw blade is briefly separated from the profile, and the cutting area is exposed to the air, allowing some heat to dissipate. When cutting the lower half, the initial temperature is lower, reducing the heat accumulation effect. When making a one-time through cut, the contact time between the blade and the material is longer, and friction generates more heat. The staged cutting shortens the single continuous cutting time by interrupting the contact, reducing the average temperature, thereby reducing the thermal damage to the cutting saw blade, slowing down the wear rate of the cutting saw blade, improving the flatness of the PVC profile cut, and facilitating the subsequent splicing and alignment of door and window frames.

[0016] 2. In this invention, during the cutting of the upper part of the profile by setting the cutting saw blade, the number of effective teeth on the cutting saw blade is relatively large, the cutting cross-section of the upper part of the PVC profile is relatively small, less debris is generated during cutting, the cutting force is distributed to more teeth, the local stress of the teeth is reduced, the material deformation is reduced, and the flatness of the profile cut is improved. During the cutting of the lower part of the profile by setting the cutting saw blade, the number of effective teeth on the cutting saw blade is relatively small, the tooth pitch is relatively large, the cutting cross-section of the lower part of the PVC profile is relatively large, and more debris is generated during cutting. By increasing the tooth pitch, the chips have enough space to be thrown out of the cutting zone, reducing heat accumulation, lowering the saw blade temperature, further reducing the thermal damage of the cutting saw blade, and slowing down the wear rate of the cutting saw blade.

[0017] 3. This invention uses alternating fixed and telescopic cutter heads on the cutting saw blade to cut the lower half of the profile, making the cutting load on both more even. This helps to maintain a balanced wear rate between the fixed and telescopic cutter heads, thus avoiding excessive wear on the fixed cutter head and insignificant wear on the telescopic cutter head. When the fixed cutter head wears excessively while the telescopic cutter head wears insignificantly, the cutting force fluctuates, affecting the cutting accuracy and quality. Therefore, when cutting the upper half of the profile later, while ensuring the cutting efficiency of the cutting saw blade on the upper half of the profile, it can also effectively reduce the cutting error caused by the difference in saw tooth wear. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the plastic-steel profile in an embodiment of the present invention; Figure 3 This is a schematic diagram of the slide block structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the drive motor in an embodiment of the present invention; Figure 5 This is a schematic diagram of the lifting wheel in an embodiment of the present invention; Figure 6 This is a schematic diagram of the trapezoidal telescopic frame in an embodiment of the present invention; Figure 7 This is a schematic diagram of the lifting inclined rail in an embodiment of the present invention; Figure 8 This is a schematic diagram of the lifting rod in an embodiment of the present invention; Figure 9 This is a schematic cross-sectional view of the cutting machine housing in an embodiment of the present invention; Figure 10 This is a schematic diagram of the gear structure in an embodiment of the present invention; Figure 11 This is a schematic diagram of the right-side structure of the gear ring in an embodiment of the present invention; Figure 12 This is a schematic diagram of the ratchet structure in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the rotating ring in an embodiment of the present invention; Figure 14 This is a schematic diagram of the right-side structure of the guide rail in an embodiment of the present invention; Figure 15 This is a schematic diagram of the structure for fixing the blade in an embodiment of the present invention; Figure 16 This is a right-side view of the fixed blade structure in an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of the adjusting ring in an embodiment of the present invention; Figure 18 This is a schematic diagram of the telescopic cutter head in the retracted state in an embodiment of the present invention; Figure 19 This is a schematic diagram of the telescopic cutter head in the extended state in an embodiment of the present invention; Figure 20 This is a schematic diagram of the card block structure in an embodiment of the present invention.

[0020] The labels in the diagram represent: 1. Cutting machine worktable; 11. Clamping cylinder; 12. Lifting cylinder; 13. Electric guide rail; 14. Plastic steel profile; 2. Electric sliding frame; 21. Cutting machine housing; 22. Rotary shaft; 23. Cutting saw blade; 24. Drive motor; 25. Lifting wheel; 26. Lifting groove; 3. Top wheel; 31. Upper horizontal rail; 32. Lower horizontal rail; 33. Lifting inclined rail; 34. Trapezoidal telescopic frame; 35. First spring; 4. Fixed blade; 41. Fixed blade head; 42. Extension... 43. Telescopic blade; 44. Adjusting ring; 45. Adjusting slant groove; 5. Push-pull wheel; 51. Actuating ring; 52. Actuating guide rail; 521. Middle arc rail; 522. Inner arc rail; 523. Outer arc rail; 524. Connecting slant rail; 53. Gear ring; 54. Gear; 55. Rotating block; 56. Connecting rod; 57. Lifting rod; 58. Lifting straight rail; 6. Support rod; 61. Locking block; 62. Second spring; 63. Protruding strip; 7. Slide seat; 8. Ratchet; 81. Pawl. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments. Example 1:

[0023] Please see Figures 1-20 This invention provides a technical solution: a cutting device for processing PVC window and door profiles capable of multiple cuts, comprising: The cutting machine workbench 1 has a clamping cylinder 11 and a lifting cylinder 12 fixedly connected to its top. The top of the lifting cylinder 12 is fixedly connected to an electric guide rail 13, and an electric slide frame 2 is slidably connected to the outer surface of the electric guide rail 13. The cutting machine housing 21 is slidably connected inside the electric slide frame 2, and a rotating shaft 22 is rotatably connected inside the cutting machine housing 21. A cutting saw blade 23 is fixedly connected to the outer circumference of the rotating shaft 22. A drive motor 24 is fixedly connected to the outer surface of the cutting machine housing 21, and the output shaft of the drive motor 24 is fixedly connected to the rotating shaft 22. A lifting groove 26 is opened on the outer surface of the electric slide frame 2, and a lifting wheel 25 is rotatably connected to the outer surface of the cutting machine housing 21. The lifting wheel 25 is slidably connected inside the lifting groove 26.

[0024] The top of the cutting machine housing 21 is rotatably connected to a top wheel 3. The electric guide rail 13 has an upper flat rail 31, a lower flat rail 32 and a lifting inclined rail 33 inside. The top wheel 3 is slidably connected inside the upper flat rail 31.

[0025] The electric guide rail 13 has a trapezoidal telescopic frame 34 that slides inside it, and a first spring 35 is fixedly connected between the trapezoidal telescopic frame 34 and the electric guide rail 13.

[0026] As a further embodiment of the present invention, such as Figure 6 As shown, during the upward movement of the top wheel 3 along the right lifting inclined rail 33, the top wheel 3 squeezes the trapezoidal telescopic frame 34 and slides inside the electric guide rail 13. After the top wheel 3 moves to the right end of the upper flat rail 31, under the elastic action of the first spring 35, the first spring 35 pushes the trapezoidal telescopic frame 34 to reset, so that the top wheel 3 slides to the left along the upper flat rail 31.

[0027] The cutting saw blade 23 includes a fixed blade 4, which is fixedly connected to the outer circumference of the rotating shaft 22. A fixed blade head 41 is fixedly connected to the outer surface of the fixed blade 4. A telescopic blade 42 is slidably connected inside the fixed blade 4. A telescopic blade head 43 is fixedly connected to the outer surface of the telescopic blade 42. An adjusting ring 44 is rotatably connected to the outer circumference of the rotating shaft 22. An adjusting groove 45 is provided on the outer surface of the adjusting ring 44. The telescopic blade 42 is slidably connected to the adjusting groove 45.

[0028] As a further embodiment of the present invention, such as Figure 16 and Figure 17 As shown, since the telescopic blade 42 is slidably connected to the adjusting groove 45, multiple telescopic blades 42 can synchronously retract or extend inside the fixed blade 4.

[0029] The outer surface of the telescopic blade 42 is rotatably connected to a push-pull wheel 5, and the outer circumferential surface of the rotating shaft 22 is rotatably connected to a toggle ring 51. The inside of the toggle ring 51 is provided with a toggle guide rail 52, and the push-pull wheel 5 is slidably connected inside the toggle guide rail 52. The toggle guide rail 52 includes a middle arc rail 521, an inner arc rail 522, an outer arc rail 523 and a connecting inclined rail 524, and the push-pull wheel 5 is slidably connected inside the middle arc rail 521.

[0030] As a further embodiment of the present invention, such as Figure 14 As shown, by controlling the guide rail 52 to rotate counterclockwise around the rotating shaft 22, the push-pull wheel 5 moves closer to the rotating shaft 22, moves away from the rotating shaft 22, moves closer to the rotating shaft 22, and so on, in a reciprocating cycle.

[0031] A gear ring 53 is fixedly connected to the outer surface of the actuating ring 51. A gear 54 is rotatably connected to the inner wall of the cutting machine housing 21, and the gear 54 meshes with the gear ring 53. A rotating block 55 is rotatably connected to the outer surface of the cutting machine housing 21, and the rotating block 55 is fixedly connected to the gear 54. A connecting rod 56 is rotatably connected to the outer surface of the rotating block 55, and a lifting rod 57 is rotatably connected to the top of the connecting rod 56. A lifting rail 58 is fixedly connected to the outer surface of the cutting machine housing 21, and the lifting rod 57 is connected to the lifting rail 58. The straight rail 58 is slidably connected; the outer surface of the electric slide frame 2 is slidably connected to the support rod 6, the bottom end of the support rod 6 is fixedly connected to the locking block 61, the support rod 6 and the electric slide frame 2 are fixedly connected to the second spring 62, the outer surface of the electric guide rail 13 is fixedly connected to the protrusion 63; the outer surface of the electric slide frame 2 is fixedly connected to the slide seat 7, and the support rod 6 is slidably connected to the electric slide frame 2 through the slide seat 7; the inner wall of the gear ring 53 is rotatably connected to the pawl 81, and the outer circumference of the rotating shaft 22 is fixedly connected to the ratchet 8.

[0032] As a further embodiment of the present invention, such as Figure 10 and Figure 11 As shown, by setting ratchet 8 and pawl 81, during the counterclockwise rotation of the rotating shaft 22, the rotating shaft 22 drives the gear ring 53 and the actuating ring 51 to rotate synchronously through ratchet 8 and pawl 81.

[0033] Working principle: First step: In practical applications, such as Figure 1 and Figure 2 As shown, by placing the plastic steel profile 14 to be cut onto the table surface of the cutting machine worktable 1, and activating the four clamping cylinders 11, the four clamping cylinders 11 fix the plastic steel profile 14 to the top of the cutting machine worktable 1, preventing the plastic steel profile 14 from moving or vibrating during cutting. Figure 3 , Figure 4 and Figure 5As shown, by starting the drive motor 24, the drive motor 24 drives the rotating shaft 22 to rotate inside the cutting machine housing 21 via the output shaft. The rotating shaft 22 drives the cutting saw blade 23 on its outer circumference to rotate around the axis of the rotating shaft 22, causing the cutting saw blade 23 to rotate rapidly inside the cutting machine housing 21. By controlling the electric sliding frame 2 to slide forward along the outer surface of the electric guide rail 13, the electric sliding frame 2 pushes the lifting wheel 25 to move along the electric guide rail 13 via the lifting groove 26 on its outer surface. The lifting wheel 25 drives the cutting machine housing 21 to move along the electric guide rail 13, and the cutting machine housing 21 drives its top... The top wheel 3 slides along the upper horizontal rail 31. Under the limiting action of the upper horizontal rail 31, the cutting machine housing 21 and the electric slide frame 2 remain relatively stationary. The electric slide frame 2 drives the cutting machine housing 21 and the cutting saw blade 23 below it to move closer to the four sets of plastic steel profiles 14, so that the cutting saw blade 23 cuts into the upper part of the plastic steel profiles 14. After the cutting saw blade 23 separates from the four sets of plastic steel profiles 14, the electric slide frame 2 continues to slide forward along the electric guide rail 13. The electric slide frame 2 drives the top wheel 3 to continue moving along the upper horizontal rail 31, so that the top wheel 3 moves closer to the left lifting inclined rail 33 along the upper horizontal rail 31 (see...). Figure 7 As the top wheel 3 slides downward along the left lifting inclined rail 33, the cutting machine housing 21 moves vertically downward relative to the electric sliding frame 2, causing the cutting machine housing 21 to drive the internal rotating shaft 22 and cutting saw blade 23 to move vertically downward relative to the electric sliding frame 2. After the top wheel 3 moves to the left end of the lower horizontal rail 32 (see...), Figure 7 By controlling the electric sliding frame 2 to slide in the opposite direction along the outer surface of the electric guide rail 13, the electric sliding frame 2 pushes the lifting wheel 25 to move along the electric guide rail 13 through the lifting groove 26 on its outer surface. The lifting wheel 25 drives the cutting machine housing 21 to move along the electric guide rail 13. The cutting machine housing 21 drives the top wheel 3 at its top to slide along the lower flat rail 32. Under the limiting action of the lower flat rail 32, the cutting machine housing 21 and the electric sliding frame 2 remain relatively stationary. The electric sliding frame 2 drives the cutting machine housing 21 and the cutting saw blade 23 below it to move closer to the four sets of plastic steel profiles 14 again, so that the cutting saw blade 23 cuts into the lower half of the plastic steel profiles 14. After the cutting saw blade 23 separates from the four sets of plastic steel profiles 14, the electric sliding frame 2 continues to slide in the opposite direction along the electric guide rail 13. The electric sliding frame 2 drives the top wheel 3 to continue to move along the lower flat rail 32, so that the top wheel 3 moves closer to the right lifting inclined rail 33 along the lower flat rail 32 (see Figure 7 As the top wheel 3 slides upward along the right-side lifting inclined rail 33, the cutting machine housing 21 moves vertically upward relative to the electric sliding frame 2, causing the cutting machine housing 21 to drive the internal rotating shaft 22 and cutting saw blade 23 to move vertically upward relative to the electric sliding frame 2. After the top wheel 3 moves to the right end of the upper horizontal rail 31 (see...), Figure 7Then, control the electric sliding frame 2 to slide forward along the outer surface of the electric guide rail 13 again...; In this way, by controlling the electric sliding frame 2 to slide back and forth along the outer surface of the electric guide rail 13, the rotating cutting saw blade 23 can first be at a higher height to cut the upper half of the PVC profile 14, and then at a lower height to cut the lower half of the PVC profile 14. After the upper half is cut, the saw blade and the profile are briefly separated, and the cutting area is exposed to the air, so the heat can be partially dissipated. When cutting the lower half, the initial temperature is lower, which reduces the heat accumulation effect. When cutting through in one go, the contact time between the blade and the material is longer, and friction generates more heat. The staged cutting shortens the single continuous cutting time by interrupting the contact, reduces the average temperature, thereby reducing the thermal damage of the cutting saw blade 23, slowing down the wear rate of the cutting saw blade 23, improving the flatness of the cut of the PVC profile 14, and facilitating the subsequent splicing and alignment of door and window frames.

[0034] Second process: In practical applications, such as Figure 3 and Figure 20 As shown, during the forward sliding of the electric slide frame 2 along the electric guide rail 13, the top of the support rod 6 gradually approaches the protrusion 63. After the top of the support rod 6 contacts the protrusion 63, under the squeezing action of the protrusion 63, the locking block 61 at the bottom of the support rod 6 separates from the lifting rod 57. The lifting rod 57 can then slide freely up and down along the lifting rail 58. After the top of the support rod 6 separates from the protrusion 63, the drive motor 24 stops working, the cutting saw blade 23 stops rotating, and under the elastic action of the second spring 62, the second spring 62 pulls the support rod 6 along the slide block 7 towards the electric slide frame 2. The support rod 6 drives the locking block 61 at its bottom to contact the lifting rod 57, thereby limiting the lifting rod 57 (the lifting rod 57 and the electric slide frame 2 remain relatively stationary). Subsequently, during the first vertical downward movement of the cutting machine housing 21 relative to the electric slide frame 2, with the cutting machine housing 21 as a reference, the lifting rod 57 moves vertically upward relative to the cutting machine housing 21, as shown. Figure 8 , Figure 9 and Figure 10 As shown, the upward-moving lifting rod 57 drives the top end of the connecting rod 56 to move upward, and the bottom end of the connecting rod 56 drives the rotating block 55 to rotate around the axis of the rotating block 55. The rotating block 55 drives the gear 54 to rotate around the axis of the gear 54. The gear 54 drives the gear ring 53 to rotate around the axis of the gear ring 53. The gear ring 53 drives the actuating ring 51 to rotate on the outer circumference of the rotating shaft 22. Figure 12 , Figure 13 and Figure 14As shown, the rotating actuating ring 51 drives the actuating guide rail 52 to rotate counterclockwise around the axis of the rotating shaft 22, causing the push-pull wheel 5 to slide in sequence with the middle arc rail 521, the connecting inclined rail 524, and the inner arc rail 522. During the sliding connection between the push-pull wheel 5 and the middle arc rail 521, the telescopic blade 42 and the telescopic cutter head 43 are limited, and the telescopic blade 42 and the telescopic cutter head 43 remain relatively stationary with respect to the fixed blade 4 and the fixed cutter head 41 (see reference). Figure 15 During the sliding connection between the push-pull wheel 5 and the connecting inclined rail 524, the connecting inclined rail 524 pushes the telescopic blade 42 and telescopic cutter head 43 closer to the rotating shaft 22 through the push-pull wheel 5. After the push-pull wheel 5 slides into contact with the inner arc rail 522, it again limits the telescopic blade 42 and telescopic cutter head 43, keeping them relatively stationary with respect to the fixed blade 4 and fixed cutter head 41 (see...). Figure 18 With the telescopic cutter head 43 in the retracted state, the locking block 61 separates from the lifting rod 57, allowing the lifting rod 57 to slide freely up and down along the lifting rail 58. The drive motor 24 then starts working, and the cutting saw blade 23... Figure 18 The rotating state shown cuts the lower half of the profile. Similarly, during the first vertical upward movement of the cutting machine housing 21 relative to the electric sliding frame 2, the push-pull wheel 5 sequentially slides and connects with the inner arc rail 522, the connecting inclined rail 524, and the middle arc rail 521, causing the cutting saw blade 23 to... Figure 15 The status shown indicates that the cutting saw blade 23 is... Figure 15 The cutting machine rotates in the indicated state to cut the upper half of the profile. Then, during the second vertical downward movement of the cutting machine housing 21 relative to the electric sliding frame 2, the push-pull wheel 5 sequentially slides and connects with the central arc rail 521, the connecting inclined rail 524, and the outer arc rail 523, causing the cutting saw blade 23 to... Figure 19 The status shown indicates that the telescopic cutter head 43 is in the extended state, and the cutting saw blade 23 is in the forward position. Figure 19 The cutting blade rotates as shown to cut the lower half of the profile. Then, during the second vertical upward movement of the cutting housing 21 relative to the electric sliding frame 2, the cutting saw blade 23 returns to its original position. Figure 15 As shown, the cutting saw blade 23 is in the state indicated. Figure 15 The blade rotates as shown to cut the upper half of the profile...; In this way, the cutting saw blade 23 can be used to cut the upper half of the profile. Figure 15 As shown, when rotating, the number of effective teeth on the cutting saw blade 23 is relatively large, such as... Figure 2 As shown, the upper half of the PVC profile 14 has a smaller cutting cross-section, resulting in fewer chips during cutting. The cutting force is distributed to more teeth, reducing local stress on the teeth, minimizing material deformation, and improving the smoothness of the profile cut. During the cutting process of the lower half of the profile by the cutting saw blade 23, the cutting saw blade 23... Figure 18or Figure 19 When rotating as shown, the number of effective teeth on the cutting saw blade 23 is relatively small, and the tooth pitch is relatively large, such as... Figure 2 As shown, the lower half of the plastic steel profile 14 has a larger cutting cross section, resulting in more chips during cutting. By increasing the tooth pitch, the chips have enough space to be thrown out of the cutting zone, reducing heat accumulation, lowering the saw blade temperature, further reducing thermal damage to the cutting saw blade 23, and slowing down the wear rate of the cutting saw blade 23.

[0035] As a further embodiment of the present invention, during the first cutting of the lower half of the profile by the cutting saw blade 23, the telescopic cutter head 43 is controlled to retract inward, and the cutting saw blade 23 cuts the lower half of the profile through the exposed fixed cutter head 41. During the second cutting of the lower half of the profile by the cutting saw blade 23, the telescopic cutter head 43 is controlled to extend outward, and the cutting saw blade 23 cuts the lower half of the profile through the exposed telescopic cutter head 43...; in this way, the cutting saw blade 23 alternately uses the fixed cutter head 41 and the telescopic cutter head 43 to cut the profile. Cutting the lower half of the material makes the cutting load on both the fixed cutter head 41 and the telescopic cutter head 43 more even, which helps to keep the wear rate of the fixed cutter head 41 and the telescopic cutter head 43 balanced. This avoids excessive wear of the fixed cutter head 41 and insignificant wear of the telescopic cutter head 43. When the fixed cutter head 41 is excessively worn and the telescopic cutter head 43 is insignificantly worn, the cutting force will fluctuate, affecting the cutting accuracy and quality. Therefore, when cutting the upper half of the profile in the subsequent process, while ensuring the cutting efficiency of the cutting saw blade 23 on the upper half of the profile, the cutting error caused by the difference in saw tooth wear can also be effectively reduced.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting device for processing PVC window and door profiles capable of multiple cuts, comprising a cutting machine worktable (1), characterized in that: The top of the cutting machine workbench (1) is fixedly connected to a clamping cylinder (11) and a lifting cylinder (12). The top of the lifting cylinder (12) is fixedly connected to an electric guide rail (13). The outer surface of the electric guide rail (13) is slidably connected to an electric slide frame (2). The electric sliding frame (2) is slidably connected to a cutting machine housing (21), and a rotating shaft (22) is rotatably connected to the inside of the cutting machine housing (21). A cutting saw blade (23) is fixedly connected to the outer circumference of the rotating shaft (22). A drive motor (24) is fixedly connected to the outer surface of the cutting machine housing (21). The output shaft of the drive motor (24) is fixedly connected to the rotating shaft (22). A lifting groove (26) is provided on the outer surface of the electric sliding frame (2). A lifting wheel (25) is rotatably connected to the outer surface of the cutting machine housing (21). The lifting wheel (25) is slidably connected inside the lifting groove (26).

2. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 1, characterized in that: The top of the cutting machine housing (21) is rotatably connected to a top wheel (3). The electric guide rail (13) has an upper flat rail (31), a lower flat rail (32) and a lifting inclined rail (33) inside. The top wheel (3) is slidably connected inside the upper flat rail (31).

3. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 1, characterized in that: The electric guide rail (13) is internally slidably connected to a trapezoidal telescopic frame (34), and a first spring (35) is fixedly connected between the trapezoidal telescopic frame (34) and the electric guide rail (13).

4. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 1, characterized in that: The cutting saw blade (23) includes a fixed blade (4), which is fixedly connected to the outer circumference of the rotating shaft (22). A fixed blade head (41) is fixedly connected to the outer surface of the fixed blade (4). A telescopic blade (42) is slidably connected inside the fixed blade (4). A telescopic blade head (43) is fixedly connected to the outer surface of the telescopic blade (42). An adjusting ring (44) is rotatably connected to the outer circumference of the rotating shaft (22). An adjusting groove (45) is provided on the outer surface of the adjusting ring (44). The telescopic blade (42) is slidably connected to the adjusting groove (45).

5. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 4, characterized in that: The outer surface of the telescopic blade (42) is rotatably connected to a push-pull wheel (5), and the outer circumferential surface of the rotating shaft (22) is rotatably connected to a toggle ring (51). The inside of the toggle ring (51) is provided with a toggle guide rail (52), and the push-pull wheel (5) is slidably connected inside the toggle guide rail (52).

6. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 5, characterized in that: The actuating guide rail (52) includes a middle arc rail (521), an inner arc rail (522), an outer arc rail (523), and a connecting inclined rail (524). The push-pull wheel (5) is slidably connected inside the middle arc rail (521).

7. A cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 5, characterized in that: A gear ring (53) is fixedly connected to the outer surface of the actuating ring (51). A gear (54) is rotatably connected to the inner wall of the cutting machine housing (21). The gear (54) meshes with the gear ring (53). A rotating block (55) is rotatably connected to the outer surface of the cutting machine housing (21). The rotating block (55) is fixedly connected to the gear (54). A connecting rod (56) is rotatably connected to the outer surface of the rotating block (55). A lifting rod (57) is rotatably connected to the top of the connecting rod (56). A lifting rail (58) is fixedly connected to the outer surface of the cutting machine housing (21). The lifting rod (57) is slidably connected to the lifting rail (58).

8. The cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 1, characterized in that: The outer surface of the electric sliding frame (2) is slidably connected to a support rod (6), the bottom end of the support rod (6) is fixedly connected to a locking block (61), a second spring (62) is fixedly connected between the support rod (6) and the electric sliding frame (2), and a protrusion (63) is fixedly connected to the outer surface of the electric guide rail (13).

9. A cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 8, characterized in that: The outer surface of the electric sliding frame (2) is fixedly connected to a sliding seat (7), and the support rod (6) is slidably connected to the electric sliding frame (2) through the sliding seat (7).

10. A cutting device for processing PVC window and door profiles capable of multiple cuts according to claim 7, characterized in that: The inner wall of the gear ring (53) is rotatably connected to a pawl (81), and the outer circumferential surface of the rotating shaft (22) is fixedly connected to a ratchet (8).

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