Plastic steel notch polishing device for producing and manufacturing plastic steel doors and windows

Abstract

The invention relates to the technical field of polishing devices, in particular to a plastic steel notch polishing device for producing and manufacturing plastic steel doors and windows, an automatic compensation structure is arranged at a polishing wheel, the automatic compensation structure is used for compensating a gap between the polishing wheel and the plastic steel doors and windows in real time, and the automatic compensation structure is in linkage with a protection structure. The protection structure is used for achieving stalling of the grinding wheel, the automatic compensation structure comprises a hollow shaft rotationally connected into the supporting plate, a first empty bin is arranged at the bottom of the hollow shaft, a first spring is arranged in the first empty bin, and a supporting shaft is slidably connected to the bottom of the first empty bin in the vertical direction; and by means of centrifugal force change caused by quality reduction after the grinding wheel is abraded, a second spring is triggered to reset to push a movable rod, then a wedge-shaped block is driven to drive a supporting shaft and the grinding wheel to move downwards, and real-time compensation of the gap between the grinding wheel and the plastic-steel door and window is achieved. Manual shutdown adjustment is not needed, production process interruption is avoided, and manual operation errors are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polishing devices, in particular to a plastic steel cut polishing device for plastic steel door and window production and manufacturing, which belongs to the improvement of polishing device parts. BACKGROUND

[0002] When producing plastic steel doors and windows, the cut part needs to be polished flat, such as the patent "a deburring device for plastic steel profile" of CN223172627U, which includes a polishing machine body, the polishing machine body is installed with an adjusting assembly, the adjusting assembly is used to drive the polishing machine body to make reciprocating motion, so as to reduce the labor intensity caused by the worker holding the polishing machine body, the polishing machine body is driven to polish the plastic steel profile by the reciprocating movement of the sliding seat on the slide rod, the traditional way of holding the polishing machine body to polish the plastic steel profile is changed, the polishing machine body is driven to move reciprocally by the cooperation of the sliding seat and the slide rod, which effectively saves manpower and increases the efficiency of deburring the plastic steel profile.

[0003] 1、The deburring device relies on the bottom surface of the polishing wheel to be in contact with the cut end surface of the plastic steel door and window to achieve burr removal. However, in the long-term polishing process, the polishing wheel will gradually thin out due to continuous wear and tear. Since the device lacks an automatic compensation structure after the polishing wheel is worn out, a gap is inevitably formed between the thinned polishing wheel and the plastic steel window part, which causes the polishing wheel to be unable to effectively contact the surface of the workpiece, resulting in incomplete burr polishing, decreased workpiece machining precision, and excessive roughness. The operator needs to manually adjust and eliminate the gap, which interrupts the production process, reduces the overall processing efficiency, and has large manual adjustment errors. The manual adjustment method is difficult to adapt to large-scale and continuous production requirements, which seriously affects the quality and production efficiency of plastic steel door and window production and manufacturing.

[0004] 2、When the polishing wheel gradually thins out and reaches the critical wear threshold, if the motor still drives the excessively worn polishing wheel to continue rotating during operation, the excessively worn polishing wheel cannot guarantee the polishing precision, which easily causes burr residues on the workpiece and uneven surface processing quality; at the same time, due to the decrease in the thickness of the polishing wheel, there may be a safety hazard of splashing and flying, which threatens the personal safety of the operator, and there is a lack of automatic stop control mechanism when the polishing wheel reaches the critical wear threshold, which further leads to the decrease in the safety of the operation. SUMMARY

[0005] The purpose of the present application is to solve the problems in the background art, and to provide a plastic steel cut polishing device for plastic steel door and window production and manufacturing.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: A plastic steel cutting and polishing device for plastic steel door and window production and manufacturing, comprising: a bearing frame, a workbench, a supporting rod, a mounting shell, a polishing machine body, the polishing machine body comprises a motor, a polishing wheel, the polishing machine body is installed in the inside of the mounting shell through the supporting plate, the motor is fixedly connected with the supporting plate through the supporting block, the polishing wheel is provided with an automatic compensation structure, the automatic compensation structure is used for real-time compensation of the gap between the polishing wheel and the plastic steel door and window, the automatic compensation structure is linked with a protection structure, the protection structure is used for realizing the stop of the polishing wheel, the automatic compensation structure comprises a hollow shaft rotatably connected in the supporting plate, the bottom of the hollow shaft is provided with a first empty warehouse, the inside of the first empty warehouse is provided with a first spring, the bottom of the first empty warehouse is slidably connected with a supporting shaft in the vertical direction, and the polishing wheel is installed at the bottom of the supporting shaft.

[0007] As a further scheme of the present application, the automatic compensation structure further comprises a groove provided at the top of the polishing wheel, one end of the groove is fixedly connected with a second spring and slidably connected with a movable rod, the second spring is fixedly connected with the movable rod, the outside of the hollow shaft is fixedly connected with a disc, the disc penetrates a sliding groove, and a wedge-shaped block is slidably connected along the sliding groove, the top end of the movable rod is in contact with the wedge-shaped block, the outside of the supporting shaft is fixedly connected with an extension rod, and the bottom surface of the wedge-shaped block is in contact with the extension rod.

[0008] As a further scheme of the present application, the protection structure comprises a rotating shaft which is hollow at the bottom of the motor, the top of the rotating shaft inner cavity is provided with a third spring, and the rotating shaft is slidably connected with an insertion block in the vertical direction, the top of the insertion block is cylindrical, and the bottom of the insertion block is square, the top of the hollow shaft is provided with a square groove, the bottom of the insertion block extends out of the rotating shaft and is inserted into the inside of the square groove, and the top end of the hollow shaft is provided with a second empty warehouse at the bottom of the square groove.

[0009] As a further scheme of the present application, the protection structure further comprises a slot between the first empty warehouse and the second empty warehouse, a cross rod is slidably arranged in the slot, the cross rod is provided with a magnet, the top of the wedge-shaped block penetrates the sliding groove, and the wedge-shaped block is fixedly connected with the cross rod.

[0010] As a further scheme of the present application, the bottom of the supporting plate is provided with a dust collection structure, the dust collection structure comprises a circular cover installed at the bottom of the supporting plate, the top and the bottom of the circular cover are hard covers, the middle of the circular cover is a folding section, the top and the bottom of the circular cover are respectively provided with an annular first plate and a second plate, and the second plate is provided with a falling groove and a flow guide groove.

[0011] As a further scheme of the present application, the dust collection structure further comprises a circular dust collection box installed at the bottom of the circular cover, and the falling groove is located at the top of the dust collection box.

[0012] As a further scheme of the present application, an arc-shaped inclined plate is fixed at the edge of the top of the disc, and the circular cover.

[0013] As a further scheme of the present application, a hollow rod is fixed at the bottom of the circular cover, the inside of the hollow rod is provided with a No. 4 spring and is slidingly connected with a bent rod, one end of the bent rod is fixedly connected with the bottom of the folding section, the bent rod is fixed with a folding rod, the folding rod is located above the disc and cooperates with the inclined plate.

[0014] The plastic steel notch polishing device for plastic steel door and window production and manufacturing has the beneficial effects that: 1. The device triggers the No. 2 spring reset to drive the movable rod, and then drives the wedge block to drive the supporting shaft and the polishing wheel to move downward, to realize real-time compensation of the gap between the polishing wheel and the plastic steel door and window, without manual shutdown adjustment, avoiding interruption of the production process, reducing manual operation errors, adapting to large-scale and continuous production needs, effectively solving the problems of incomplete burr polishing and insufficient machining precision caused by the gap generated by the wear of the polishing wheel in the traditional device, and significantly improving the quality and efficiency of plastic steel door and window production.

[0015] 2. The automatic compensation structure is linked with the protection structure, when the wear of the polishing wheel reaches the critical threshold, the wedge block drives the magnet of the cross rod to completely enter the No. 2 empty chamber, drives the plug to separate from the square slot of the hollow shaft through the magnetic attraction force, so that the rotating shaft of the motor idles and the polishing wheel automatically stops. This design avoids the problem of uneven workpiece quality caused by the continuous operation of the excessively worn polishing wheel, and eliminates the safety hazard of the broken and scattered polishing wheel after thinning, providing protection for the personal safety of the operator and making up for the defects of the traditional device lacking critical wear automatic control mechanism.

[0016] 3. Relying on the power of the rotating polishing wheel, the circular cover is driven to reciprocatingly expand and retract through the cooperation of the inclined plate and the folding rod, forming a complete dust collection closed loop. When expanding, the circular cover forms a closed channel, and the flow guide groove guides the dust to gather directionally; when retracting, the space compression promotes the dust to fall off the airflow due to inertia, and finally collects into the dust collection box through the falling groove. No additional power is needed throughout the process, realizing efficient interception and collection of dust, effectively improving the dust pollution problem of polishing operation and optimizing the operation environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The appearance view of the polishing device is provided in the present application; Figure 2 The appearance view of the polishing device is provided in the present application; Figure 3 The appearance view of the polishing device is provided in the present application; Figure 2 The cross-sectional view is provided in the present application; Figure 4 The application provides a circular cover Figure 2 The display diagram after the circular cover is removed; Figure 5 The application provides a circular cover Figure 3 The schematic diagram of a partial structure; Figure 6 The application provides a circular cover Figure 5 The enlarged view of A of the circular cover; Figure 7 The application provides a circular cover and the schematic diagram of the inside of the circular cover; Figure 8 The application provides a circular cover Figure 7 The sectional view.

[0018] In the figure: 1, a bearing frame; 2, a supporting rod; 3, a mounting shell; 4, a grinder body; 5, a motor; 6, a grinding wheel; 7, a supporting plate; 8, a supporting block; 9, a workbench; 10, a hollow shaft; 11, a first hollow cavity; 12, a first spring; 13, a supporting shaft; 14, a groove; 15, a second spring; 16, a movable rod; 17, a disc; 18, a sliding groove; 19, a wedge-shaped block; 20, an extension rod; 21, a rotating shaft; 22, a third spring; 23, an insertion block; 24, a square groove; 25, a second hollow cavity; 26, a slot; 27, a cross rod; 28, a magnet; 29, a circular cover; 30, a folding section; 31, a first plate; 32, a second plate; 33, a falling groove; 34, a flow guide groove; 35, a dust collecting box; 36, an inclined plate; 37, a hollow rod; 38, a fourth spring; 39, a bent rod; and 40, a folding rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0021] A PVC window and door manufacturing device for grinding and polishing PVC cut edges includes: a support frame 1, a worktable 9, a support rod 2, a mounting shell 3, and a grinding machine body 4. The grinding machine body 4 includes a motor 5 and a grinding wheel 6. The grinding machine body 4 is mounted inside the mounting shell 3 via a support plate 7. The motor 5 and the support plate 7 are fixedly connected via a support block 8. This part references the content of patent CN223172627U and will not be described again here. The grinding wheel 6 can be bolted to the bottom of the support shaft 13 for easy installation and disassembly.

[0022] Specifically, during the work, the PVC window and door are placed on top of the workbench 9, and the cut end of the PVC end face that needs to be ground is placed at the bottom of the grinding wheel 6. The motor 5 drives the grinding wheel 6 to rotate and grind the burrs at the cut end.

[0023] The difference lies in the fact that the grinding wheel 6 is equipped with an automatic compensation structure. This automatic compensation structure is used to compensate for the gap between the grinding wheel 6 and the PVC window / door in real time. The automatic compensation structure is linked to a protection structure, which stops the grinding wheel 6 from rotating. This allows for grinding operations on PVC windows / doors without stopping the machine.

[0024] Specifically, the automatic compensation structure includes a hollow shaft 10 rotatably connected inside the support plate 7. The bottom of the hollow shaft 10 is provided with a first empty chamber 11. A first spring 12 is provided inside the first empty chamber 11. The bottom of the first empty chamber 11 is slidably connected to a support shaft 13 in the vertical direction. The grinding wheel 6 is installed at the bottom of the support shaft 13. The automatic compensation structure also includes a groove 14 provided on the top of the grinding wheel 6. A second spring 15 is fixed inside the groove 14 and slidably connected to a movable rod 16. The second spring 15 is fixedly connected to the movable rod 16.

[0025] Furthermore, a disc 17 is fixed to the outside of the hollow shaft 10, a groove 18 is passed through the disc 17, and a wedge block 19 is slidably connected along the groove 18. The top end of the movable rod 16 contacts the wedge block 19. An extension rod 20 is fixed to the outside of the support shaft 13, and the bottom surface of the wedge block 19 contacts the extension rod 20.

[0026] The above workflow is as follows: As the grinding wheel 6 wears down and becomes lighter, compared to its intact state, the centrifugal force decreases while maintaining the same rotational speed. The rotation of the grinding wheel 6 generates centrifugal force. In the intact state, the movable rod 16 experiences a greater centrifugal force, causing the second spring 15 to be stretched further. Figure 5 As shown.

[0027] However, as the grinding wheel 6 wears down, its thickness decreases and its mass diminishes. At this point, the centrifugal force on the movable rod 16 decreases with the reduction in mass, causing the stretched second spring 15 to partially return to its original position. Then, the movable rod 16... Figure 5 The position moves to the left. When the movable rod 16 moves, it pushes against the wedge block 19 and moves in the slide groove 18. Then the wedge block 19 acts on the extension rod 20, which in turn carries the support shaft 13 down in the first empty chamber 11 of the hollow shaft 10. The first spring 12 facilitates the subsequent reset of the support shaft 13.

[0028] The distance the support shaft 13 descends is directly proportional to the magnitude of the centrifugal force. Consequently, the descent of the support shaft 13 is also directly proportional to the wear of the grinding wheel 6. The more severe the wear of the grinding wheel 6, the more the support shaft 13 descends with the grinding wheel 6. This allows for real-time adjustment of the descent distance of the grinding wheel 6 based on the amount of wear during operation, enabling real-time automatic compensation for wear. This helps to overcome the first drawback in the background technology.

[0029] Specifically, the protective structure includes a hollow rotating shaft 21 at the bottom of the motor 5. A No. 3 spring 22 is provided at the top of the inner cavity of the rotating shaft 21, and a plug 23 is slidably connected to the rotating shaft 21 in the vertical direction. The top of the plug 23 is cylindrical, and the bottom of the plug 23 is square. A square groove 24 is provided at the top of the hollow shaft 10, and the bottom of the plug 23 extends out of the rotating shaft 21 and is inserted into the interior of the square groove 24.

[0030] Furthermore, a second empty compartment 25 is provided at the top of the hollow shaft 10 at the bottom of the square groove 24.

[0031] In addition, the protective structure also includes a slot 26 that runs between the first empty compartment 11 and the second empty compartment 25. A crossbar 27 slides inside the slot 26. A magnet 28 is provided on the crossbar 27. The top of the wedge block 19 passes through the sliding groove 18. The wedge block 19 is fixedly connected to the crossbar 27.

[0032] The above workflow is as follows: Figure 5 , 6 When the wedge block 19 moves, it moves the crossbar 27. When the wedge block 19 moves to its maximum movable range, it indicates that the grinding wheel 6 has reached its wear threshold. The wedge block 19, along with the magnet 28 on the crossbar 27, completely enters the interior of the second empty chamber 25. Since the insert block 23 is made of iron, the magnetic attraction generated after it fully enters is strong. Under the action of the magnetic attraction, the third spring 22 is stretched. At this time, the insert block 23 descends within the rotating shaft 21. Then, the bottom (square) of the insert block 23 moves from inside the square groove 24 into the interior of the second empty chamber 25, while the top (cylindrical) of the insert block 23 enters the square groove 24. The top of the insert block 23 does not contact the square groove 24 at all. Therefore, when the rotating shaft 21 rotates, it will cause the insert block 23 to rotate freely, thus preventing the hollow shaft 10 from rotating and causing the grinding wheel 6 to stop rotating. Through the cooperation of the above structure, it will only stop rotating when the grinding wheel 6 reaches the wear threshold, thereby solving the second drawback in the background technology.

[0033] Specifically, the bottom of the support plate 7 is provided with a dust collection structure, which includes a circular cover 29 installed at the bottom of the support plate 7. The top and bottom of the circular cover 29 are rigid covers, and the middle of the circular cover 29 is a folding section 30. The folding section 30 facilitates the lengthening and shortening of the circular cover 29. The top and bottom of the circular cover 29 are respectively provided with annular plate 31 and plate 32. The plate 32 is provided with a drop groove 33 and a guide groove 34.

[0034] Furthermore, the dust collection structure also includes a circular dust collection box 35 installed at the bottom of the circular cover 29. The dust collector 35 is detachable, for example, the dust collector 35 is snapped into the bottom of the circular cover 29 for easy disassembly. The drop groove 33 is located at the top of the dust collection box 35. An arc-shaped inclined plate 36 is fixed at the edge of the top of the disc 17. The dust collection box 35 can be installed at the bottom of the circular cover 29 by magnetic attraction or bolts.

[0035] In addition, a hollow rod 37 is fixed to the bottom of the circular cover 29. A No. 4 spring 38 is installed inside the hollow rod 37 and a bent rod 39 is slidably connected thereto. One end of the bent rod 39 is fixedly connected to the bottom of the folding section 30. A folding rod 40 is fixed to the bent rod 39. The folding rod 40 is located above the disc 17 and cooperates with the inclined plate 36.

[0036] The above workflow is as follows: Figure 3 , 8 When the circular cover 29 is fully unfolded, it is like... Figure 3 The rotation of the hollow shaft 10 will cause the disc 17 and the inclined plate 36 to rotate synchronously. During the rotation, the inclined plate 36 will come into contact with the folding rod 40, and then it will cause the bent rod 39 to slide upward in the hollow rod 37 and compress the fourth spring 38. In turn, the rise of the bent rod 39 will drive the unfolded circular cover 29 to retract and close.

[0037] The circular cover 29 reciprocates by unfolding and retracting the middle folding section 30, forming a complete closed loop for dust collection: when it descends and unfolds, the folding section 30 expands to form a vertical closed channel, which confines the dust generated by the grinding wheel 6 grinding the cut of the plastic steel door and window within the ring to prevent it from spreading. The expansion of the channel also drives the external air to flow upward, carrying the dust along the wall of the circular cover 29. In conjunction with the guide groove 34 on the second plate 32 (the bottom of the groove is inclined downward to the drop groove 33), the dust is guided to converge in a direction to the drop groove 33 and initially fall into the dust collection box 35. The annular first plate 31 blocks the dust-laden airflow generated by grinding from moving upward indefinitely, preventing the dust from leaking out from the top gap of the circular cover 29.

[0038] When retracted, the folding section 30 retracts upward, rapidly compressing the internal space. The airflow velocity increases sharply and the flow direction changes. Dust particles, due to inertia, impact the walls of the cover and the guide channel 34, separating from the airflow under inertial impact. Specifically, when the airflow suddenly changes direction and speed due to space compression, larger dust particles will continue to maintain their original motion trend due to inertia, thus detaching from the airflow, impacting the wall, and settling, achieving separation from the airflow and falling into the drop trough 33, further ensuring that the dust falls into the dust collection box 35. This reciprocating combination of unfolding and enclosing dust guidance and retraction achieves efficient dust interception and collection, all achieved by the force of the rotating grinding wheel 6, realizing efficient energy utilization.

[0039] It needs to be explained that, such as Figure 8As shown, the trough 33 is designed with an incline, with a large opening at the top and a small opening at the bottom. The large opening at the top allows dust to fall in easily, while the small opening at the bottom can block the airflow, preventing the dust inside the dust collector 35 from being blown out. It is equivalent to a one-way valve that only allows inflow and not outflow. Then, the dust collection box 35 can be removed periodically to empty the dust inside.

[0040] Working principle: The PVC window / door is placed on the workbench 9. After the motor 5 starts, the rotating shaft 21, the insert block 23, and the square groove 24 at the top of the hollow shaft 10 drive the hollow shaft 10, the support shaft 13, and the grinding wheel 6 to rotate synchronously, grinding the burrs on the cut of the PVC window / door. After the grinding wheel 6 wears down, the centrifugal force on the movable rod 16 decreases. The second spring 15 resets and pushes the movable rod 16 to move, causing the wedge block 19 to slide along the slide groove 18 of the disc 17. The wedge block 19 acts on the extension rod 20, causing the support shaft 13 to slide down along the first empty chamber 11 of the hollow shaft 10. The first spring 12 assists in resetting. The descent of the support shaft 13 compensates for the gap between the grinding wheel 6 and the workpiece in real time, ensuring the grinding fit. When the grinding wheel 6 wears to the threshold, the wedge block 19 moves to its maximum stroke, causing the crossbar 27 to slide along the slot 26, allowing the magnet 28 to enter the second empty chamber 25. The magnetically attracted iron insert 23 overcomes the tension of the third spring 22 and descends along the rotating shaft 21. The bottom of the insert 23 disengages from the square slot 24, and the rotating shaft 21 will only drive the insert 23 to rotate freely at this time. The hollow shaft 10 and the grinding wheel 6 stop rotating, avoiding safety hazards and accuracy problems. Simultaneously, the hollow shaft 10 drives the disc 17 and the inclined plate 36 to rotate. The inclined plate 36 periodically cooperates with the folding rod 40 to push the bent rod 39 to slide along the hollow rod 37 and compress the fourth spring 38, driving the folding section 30 of the circular cover 29 to reciprocate in unfolding and retracting: when unfolded, a closed channel is formed, the first plate 31 blocks the dust from escaping upwards, and the dust is guided by the guide channel 34 to the lower drop channel 33 and initially enters the dust collection box 35; when retracted, the space is compressed, and the dust is separated from the airflow due to inertia and impacts the cover wall, and falls completely into the dust collection box 35 through the lower drop channel 33 to complete efficient dust collection.

[0041] The above are merely preferred embodiments 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 plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows, comprising: The assembly includes a support frame (1), a workbench (9), a support rod (2), a mounting shell (3), and a grinding machine body (4). The grinding machine body (4) includes a motor (5) and a grinding wheel (6). The grinding machine body (4) is installed inside the mounting shell (3) via a support plate (7). The motor (5) and the support plate (7) are fixedly connected via a support block (8). The grinding wheel (6) is equipped with an automatic compensation structure, which is used to compensate for the distance between the grinding wheel (6) and the plastic steel door / window in real time. The automatic compensation structure is linked to a protective structure, which is used to stop the grinding wheel (6). The automatic compensation structure includes a hollow shaft (10) rotatably connected inside the support plate (7). A first empty chamber (11) is provided at the bottom of the hollow shaft (10). A first spring (12) is provided inside the first empty chamber (11). A support shaft (13) is slidably connected to the bottom of the first empty chamber (11) in the vertical direction. The grinding wheel (6) is installed at the bottom of the support shaft (13).

2. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 1, characterized in that, The automatic compensation structure also includes a groove (14) on the top of the grinding wheel (6), a second spring (15) is fixed inside the groove (14) and a movable rod (16) is slidably connected to it, the second spring (15) is fixedly connected to the movable rod (16), and a disc (17) is fixed to the outside of the hollow shaft (10).

3. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 2, characterized in that, The automatic compensation structure also includes a disk (17) through which a groove (18) passes, and a wedge block (19) is slidably connected along the groove (18). The top of the movable rod (16) contacts the wedge block (19). An extension rod (20) is fixed to the outside of the support shaft (13). The bottom surface of the wedge block (19) contacts the extension rod (20).

4. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 1, characterized in that, The protective structure includes a hollow rotating shaft (21) at the bottom of the motor (5), a No. 3 spring (22) is provided at the top of the inner cavity of the rotating shaft (21), and a plug (23) is slidably connected to the rotating shaft (21) in the vertical direction. The top of the plug (23) is cylindrical and the bottom of the plug (23) is square. A square groove (24) is provided at the top of the hollow shaft (10). The bottom of the plug (23) extends out of the rotating shaft (21) and is inserted into the interior of the square groove (24). A second empty chamber (25) is provided at the bottom of the square groove (24) at the top of the hollow shaft (10).

5. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 3, characterized in that, The protective structure also includes a slot (26) that runs between the first empty compartment (11) and the second empty compartment (25). A crossbar (27) slides inside the slot (26). A magnet (28) is provided on the crossbar (27). The top of the wedge block (19) passes through the sliding groove (18). The wedge block (19) is fixedly connected to the crossbar (27).

6. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 1, characterized in that, The bottom of the support plate (7) is provided with a dust collection structure, which includes a circular cover (29) installed at the bottom of the support plate (7). The top and bottom of the circular cover (29) are hard covers, and the middle of the circular cover (29) is a folded section (30).

7. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 6, characterized in that, The top and bottom of the circular cover (29) are respectively provided with a first plate (31) and a second plate (32), and the second plate (32) is provided with a drop groove (33) and a guide groove (34).

8. The plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 7, characterized in that, The dust collection structure also includes a circular dust collection box (35) installed at the bottom of the circular cover (29), and the drop groove (33) is located at the top of the dust collection box (35).

9. A plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 6, characterized in that, A hollow rod (37) is fixed to the bottom of the circular cover (29). A No. 4 spring (38) is installed inside the hollow rod (37) and a bent rod (39) is slidably connected thereto. One end of the bent rod (39) is fixedly connected to the bottom of the folding section (30). A folding rod (40) is fixed to the bent rod (39).

10. A plastic steel cutting edge grinding device for manufacturing plastic steel doors and windows according to claim 2, characterized in that, An arc-shaped inclined plate (36) is fixed at the top edge of the disk (17).

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