A flexible suspension grinding device for welding seams of aluminum profiles
By designing flexible suspension grinding equipment on the welds of aluminum profiles, the problems of low grinding efficiency and unstable grinding amount in the prior art are solved, and efficient positioning grinding of four corners of two doors and windows and extending the life of the grinding sheet is achieved. .
Patent Information
- Application Number
- CN202110386258.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-04-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2041-04-12
AI Technical Summary
The existing aluminum door and window weld cleaning and grinding machines can only clean one corner joint at a time, which is inefficient in grinding efficiency, and the grinding amount caused by wear of the grinding sheet is unstable, affecting the surface accuracy.
A flexible suspension grinding equipment for welding welds of aluminum profiles is designed, including an adjustable grinding device and door and window positioning device, which can position the four corners of two doors and windows at the same time, and adjust the contact between the grinding sheet and the profile through a floating cylinder. Ensure consistency of grinding volume.
The four corners of the two doors and windows are simultaneously positioned and polished, which improves the grinding efficiency, extends the service life of the grinding sheet, and ensures the consistency and stability of surface accuracy.
Smart Images
Figure CN112935988B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to door and window polishing equipment. Background Art
[0002] The existing aluminum door and window weld cleaning and grinding machines can only clean one corner of the door and window at a time, and the grinding efficiency is too slow; and the existing aluminum door and window weld cleaning and grinding machines often grind to a fixed depth on the product surface according to a set grinding amount. If the surface size tolerance of the product to be grinded is slightly large, or the grinding sheet becomes thinner after repeated use, the originally set grinding amount will not be achieved, the door and window welds cannot be effectively polished, the grinding effect will be significantly different, and a better surface grinding accuracy cannot be obtained. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a flexible suspension grinding device for aluminum profile welding seams, so that two corners of two doors and windows can be positioned in one positioning operation.
[0004] In order to solve the above technical problems, the present invention includes a frame, a workbench arranged on the frame and a grinding device arranged on the frame. The grinding device is arranged on the frame in an adjustable position in three directions of up and down, left and right, and front and back. A door and window positioning device is arranged on the workbench. The door and window positioning device includes two sets of door and window positioning blocks, each set of door and window positioning blocks includes two fixed support plates and two movable clamping plates, and the two sets of door and window positioning blocks share a fixed support plate and a movable clamping plate.
[0005] Preferably, the door and window positioning device includes three fixed backing plates and three movable pressing plates, the three fixed backing plates are a first fixed backing plate, a second fixed backing plate and a third fixed backing plate, the three movable pressing plates are a first movable pressing plate, a second movable pressing plate and a third movable pressing plate, the three fixed backing plates are all fixed on a workbench, the three movable pressing plates are all arranged on the workbench by a driving mechanism and are movable up and down, the first fixed backing plate is provided with a first positioning surface, the second fixed backing plate is provided with a second positioning surface, the third fixed backing plate is provided with a third positioning surface and a fourth positioning surface which are opposite to each other, the first positioning surface and the third positioning surface form a right-angle positioning surface, the second positioning surface and the fourth positioning surface form a right-angle positioning surface, the first positioning surface and the second positioning surface are in the same plane or parallel, the second movable pressing plate is used for pressing the frame edges of two doors and windows positioned on the third positioning surface and the fourth positioning surface, the first movable pressing plate and the third movable pressing plate are respectively used for pressing the frame edges of two doors and windows facing the third positioning surface and the fourth positioning surface.
[0006] Preferably, the three movable clamping plates are all arranged on the workbench through a clamping cylinder, the cylinder body of the clamping cylinder is fixed on the lower side of the bottom surface of the workbench, the three movable clamping plates are respectively fixed on the piston rods of the corresponding clamping cylinders, and the three movable clamping plates are located above the workbench.
[0007] Preferably, the grinding device includes a grinding frame, a grinding motor arranged on the grinding frame and a grinding plate arranged on the main shaft of the grinding motor. The grinding motor is arranged on the grinding frame through a floating mechanism and an angle adjustment mechanism. The floating mechanism includes a floating plate arranged on the grinding frame for sliding up and down and a floating cylinder for pushing the floating plate to slide up and down on the grinding frame. The angle adjustment mechanism includes a motor connecting plate for installing the grinding motor and an angle adjustment cylinder. The motor connecting plate is connected to the floating plate for rotating up and down. Both ends of the angle adjustment cylinder are respectively hinged to the floating plate and the motor connecting plate. The angle adjustment cylinder is used to push the motor connecting plate to rotate up and down on the floating plate.
[0008] Preferably, the cylinder body of the floating cylinder is fixed to the lower part of the grinding frame, the piston rod of the floating cylinder faces upward, and the floating plate is connected to the piston rod of the floating cylinder.
[0009] Preferably, the cylinder body of the floating cylinder is fixed on the upper part of the grinding frame, the piston rod of the floating cylinder faces downward, and the floating plate is connected to the piston rod of the floating cylinder.
[0010] Preferably, the floating cylinder is connected to a self-balancing regulating circuit, which includes a first air supply pipeline and a second air supply pipeline, in which a first solenoid valve and a pressure reducing valve are connected in series, and in which a second solenoid valve and an electric proportional valve are connected in series. The first air supply pipeline connects the air source and the upper chamber of the floating cylinder, and the second air supply pipeline connects the air source and the lower chamber of the floating cylinder. The first air supply pipeline and the second air supply pipeline are connected in parallel and then connected to the air source through a filter pressure reducing valve.
[0011] Preferably, two parallel vertical guide shafts are fixed on the grinding frame, shaft sleeves are provided on the guide shafts, the floating plate is fixedly connected to the two shaft sleeves, and the angle adjustment cylinder is located between the two guide shafts.
[0012] Preferably, the frame is provided with a left-right movable seat for moving left-right, the left-right movable seat is provided with a front-back movable seat for moving forward and backward, the front-back movable seat is provided with an upper and lower movable plate for moving up and down, and the grinding frame is arranged on the upper and lower movable plates for rotating left-right.
[0013] Preferably, the present invention includes a sheet changing mechanism arranged at the lower side of the workbench, the sheet changing mechanism includes a sheet barrel and a sheet clamping mechanism, the sheet barrel and the sheet clamping mechanism are arranged on a movable plate, the movable plate is connected to an extension cylinder driving the movable plate to move left and right, a sheet bearing plate is arranged in the sheet barrel, a sheet ejection cylinder driving the sheet bearing plate to lift is arranged below the sheet bearing plate, the sheet clamping mechanism includes a sheet clamp controlled by a cylinder to open and close up and down, the sheet clamp is connected to a clamping extension cylinder controlling the horizontal movement of the sheet clamp, and a sheet changing operation channel is arranged above the sheet barrel. The sheet changing mechanism can automatically change sheets, enhancing the automatic intelligence of the equipment.
[0014] The beneficial effects of the present invention are as follows: the door and window positioning device of the present invention can position two doors and windows at the same time, and the two corners of each door and window are accurately fixed on the workbench. One positioning operation can realize the positioning of the two corners of the two doors and windows, and realize the positioning and grinding of four corners at one time, and the grinding efficiency is increased to 4 times the original. In the case of using flexible suspension mechanics to control the grinding device, the position of the grinding sheet is controlled by setting a floating cylinder, and the contact between the grinding sheet and the profile surface is adjusted by the floating cylinder, so that the grinding sheet can achieve the designed grinding amount after wear. Under the condition of a certain amount of wear, the grinding effect will not be affected by the wear of the grinding sheet, and the service life of the grinding sheet is extended. It can also ensure that the workpiece being processed will not produce obvious quality fluctuations due to slight changes in its own size or relative position, ensuring the consistency, stability and reliability of automated grinding and polishing. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;
[0016] Figure 2 It is a main structural schematic diagram of the present invention;
[0017] Figure 3 It is a schematic structural diagram of the grinding device and the moving mechanism of the present invention;
[0018] Figure 4 yes Figure 3 The main view;
[0019] Figure 5 It is a schematic diagram of the structure of the door and window positioning device of the present invention;
[0020] Figure 6 It is a structural schematic diagram of the film changing device of the present invention;
[0021] Figure 7 It is a schematic diagram of the main structure of the grinding device of the present invention;
[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the grinding device of the present invention;
[0023] Fig. 9 is a schematic diagram of a self-balancing regulating circuit of a grinding device of the present invention;
[0024] In the figure: 1, frame, 2, moving mechanism, 3, workbench, 4, operation box, 5, sheet changing mechanism, 6, grinding device, 2-1, front and rear moving motor, 2-2, front and rear moving screw and nut mechanism, 2-3, front and rear movable seat, 2-4, left and right moving seat, 2-5, rack, 2-6, left and right moving motor, 2-7, up and down moving screw and nut mechanism, 2-8, up and down moving motor, 2-9, rotating cylinder, 2-10, upper and lower movable plates, 3-1, window frame, 3-2, third fixed support plate, 3-3, second fixed support plate, 3-4, first fixed support plate, 3-5, movable clamping plate, 3-6, clamping cylinder, 5-1, fixed plate, 5-2, movable plate, 5-3, cylinder fixed plate, 5-4, clamping and extending cylinder, 5-5, clamping cylinder, 5-6, clamping plate, 5-7, extending cylinder, 5-8, grinding disc barrel, 5-9, grinding disc ejection cylinder, 6-1, grinding motor, 6-2, grinding disc, 6-3, Motor connecting plate, 6-4, lower fixed plate, 6-5, floating plate, 6-6, guide shaft, 6-7, bushing, 6-8, connecting plate, 6-9, upper fixed plate, 6-10, angle adjustment cylinder, 6-11, cylinder connecting plate, 6-12, floating cylinder, 6-13, connecting pin, 6-14, filter pressure reducing valve, 6-15, pressure reducing valve, 6-16, first solenoid valve, 6-17, first air supply pipeline, 6-18, second solenoid valve, 6-19, electric proportional valve, 6-20, second air supply pipeline. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] like Figure 1 and Figure 2 The flexible suspended grinding equipment for welding seams of aluminum profiles shown includes a frame 1, a moving mechanism 2, a workbench 3, an operating box 4, a film changing mechanism 5 and a grinding device 6, wherein the moving mechanism 2, the workbench 3, the operating box 4 and the film changing mechanism 5 are all arranged on the frame 1.
[0027] like Figure 3 and Figure 4As shown, the moving mechanism 2 includes a front-to-back moving motor 2-1, a front-to-back moving screw and nut mechanism 2-2, a front-to-back movable seat 2-3, a left-to-right moving seat 2-4, a rack 2-5, a left-to-right moving motor 2-6, an up-and-down moving screw and nut mechanism 2-7, an up-and-down moving motor 2-8, a rotating cylinder 2-9 and an up-and-down movable plate 2-10, the rack 2-5 is fixed on the frame 1, the left-to-right moving motor 2-6 is fixed on the left-to-right moving seat 2-4, the left-to-right moving seat 2-4 is arranged on the frame 1 for left-and-right movement, and the left-to-right moving motor 2-6 is connected to a gear meshing with the rack 2-5. The left-right movable seat 2-4 is provided with a front-and-rear movable seat 2-3 that moves forward and backward, a front-and-rear movable motor 2-1 is fixed on the front-and-rear movable seat 2-3, and the front-and-rear movable motor 2-1 is connected to the left-and-right movable seat 2-4 through a front-and-rear movable lead screw nut mechanism 2-2, and an upper and lower movable plate 2-10 that moves up and down is provided on the front-and-rear movable seat 2-3, an upper and lower movable plate 2-10 is fixed with an upper and lower movable motor 2-8, and the upper and lower movable motor 2-8 is connected to the front-and-rear movable seat 2-3 through an upper and lower movable lead screw nut mechanism 2-7, and a rotating cylinder 2-9 is installed on the upper and lower movable plates 2-10, and a grinding device 6 is installed on the upper and lower movable plates 2-10 through the rotating cylinder 2-9, and the grinding device 6 is pushed by the rotating cylinder 2-9 to rotate left and right on the upper and lower movable plates 2-10. The rotating cylinder 2-9 can also be replaced by a servo motor.
[0028] like Figure 6 As shown, the sheet changing mechanism 5 is arranged at the lower side of the workbench, and the sheet changing mechanism 5 includes a fixed plate 5-1, a movable plate 5-2, a cylinder fixed plate 5-3, a clamping and extending cylinder 5-4, a clamping cylinder 5-5, a clamping plate 5-6, an extending cylinder 5-7, a grinding sheet barrel 5-8 and a grinding sheet ejecting cylinder 5-9. The fixed plate 5-1 is fixed on the frame 1, the movable plate 5-2 is horizontally slidably arranged on the fixed plate 5-1, the movable plate 5-2 slides on the fixed plate 5-1 through the extending cylinder 5-7, the cylinder fixed plate 5-3 is fixed on the movable plate 5-2, the clamping and extending cylinder 5-4 is fixed on the cylinder fixed plate 5-3, the clamping and extending cylinder 5-4 is connected to the grinding sheet clamp, and the grinding sheet clamp package It includes a clamping cylinder 5-5 and two upper and lower clamping plates 5-6. The clamping cylinder 5-5 controls the upper clamping plate 5-6 to move up and down. The upper clamping plate is fixed on the clamping cylinder 5-5, and the old grinding sheet on the grinding motor 6-1 is torn off by the clamping plate; a grinding sheet bearing plate is arranged in the grinding sheet barrel 5-8, and a grinding sheet ejecting cylinder 5-9 for driving the grinding sheet bearing plate to rise and fall is arranged below the grinding sheet bearing plate. The grinding sheet ejecting cylinder 5-9 extends out to eject the new grinding sheet from the grinding sheet barrel 5-8, so that it is attached to the position where the grinding sheet is installed on the grinding motor 6-1; a sheet changing operation channel is arranged above the grinding sheet barrel 5-8, so that the grinding device 6 and the sheet changing mechanism 5 can be connected through the sheet changing operation channel to realize sheet changing.
[0029] like Figure 5As shown, a door and window positioning device is arranged on the workbench 3, and the door and window positioning device includes three fixed backing plates and three movable clamping plates 3-5. The three fixed backing plates are the first fixed backing plate 3-4, the second fixed backing plate 3-3 and the third fixed backing plate 3-2, and the three movable clamping plates are the first movable clamping plate, the second movable clamping plate and the third movable clamping plate. The three fixed backing plates are all fixed on the workbench 3, and the three movable clamping plates are all arranged on the workbench 3 so as to move up and down by the clamping cylinder 3-6. The cylinder body of the clamping cylinder 3-6 is fixed on the lower side of the bottom surface of the workbench 3, and the three movable clamping plates 3-5 are respectively fixed on the piston rods of the corresponding clamping cylinders 3-6, and the three movable clamping plates 3-5 are located above the workbench 3. The first fixed backing plate 3-4 is provided with a first positioning surface, the second fixed backing plate 3-3 is provided with a second positioning surface, the third fixed backing plate 3-2 is provided with a third positioning surface and a fourth positioning surface which are opposite to each other, the first positioning surface and the third positioning surface form a right-angle positioning surface, the second positioning surface and the fourth positioning surface form a right-angle positioning surface, the first positioning surface and the second positioning surface are in the same plane or parallel, the second movable clamping plate is used for clamping the frame edges of the two window frames 3-1 positioned on the third positioning surface and the fourth positioning surface, the first movable clamping plate and the third movable clamping plate are respectively used for clamping the frame edges of the two window frames 3-1 facing the third positioning surface and the fourth positioning surface.
[0030] like Figure 7-9 The flexible suspension mechanical control grinding device shown includes a grinding frame, a grinding motor 6-1 arranged on the grinding frame, and a grinding sheet 6-2 arranged on the main shaft of the grinding motor 6-1. The grinding frame includes a vertically arranged connecting plate 6-8, a horizontally arranged upper fixing plate 6-9 is fixed to the upper end of the connecting plate 6-8, and a horizontally arranged lower fixing plate 6-4 is fixed to the lower end of the connecting plate 6-8.
[0031] The grinding motor 6-1 is arranged on the grinding frame through a floating mechanism and an angle adjustment mechanism. The floating mechanism includes a floating plate 6-5 which is slidably arranged on the grinding frame and a floating cylinder 6-12 for pushing the floating plate 6-5 to slide up and down on the grinding frame. The angle adjustment mechanism includes a motor connecting plate 6-3 and an angle adjustment cylinder 6-10 for installing the grinding motor 6-1. The motor connecting plate 6-3 is connected to the floating plate 6-5 by a connecting pin 6-13 for rotating up and down. The two ends of the angle adjustment cylinder 6-10 are respectively hinged to the floating plate 6-5 and the motor connecting plate 6-3. A cylinder connecting plate 6-11 is fixed on the motor connecting plate 6-3. The piston rod of the angle adjustment cylinder 6-10 is hinged to the cylinder connecting plate 6-11. The angle adjustment cylinder 6-10 is used to push the motor connecting plate 6-3 to rotate up and down on the floating plate 6-5. Two parallel vertical guide shafts 6-6 are fixed on the upper fixed plate 6-9 and the lower fixed plate 6-4, and shaft sleeves 6-7 are arranged on the guide shafts 6-6. The floating plate 6-5 is fixedly connected with the two shaft sleeves 6-7, and the angle adjustment cylinder 6-10 is located between the two guide shafts 6-6.
[0032] The cylinder body of the floating cylinder 6-12 is fixed on the lower fixed plate 6-4, the piston rod of the floating cylinder 6-12 faces upward, and the floating plate 6-5 is connected to the piston rod of the floating cylinder 6-12.
[0033] As another implementation: the cylinder body of the floating cylinder 6-12 can also be fixed on the upper fixed plate 6-9, the piston rod of the floating cylinder 6-12 faces downward, and the floating plate 6-5 is connected to the piston rod of the floating cylinder 6-12.
[0034] The floating cylinder 6-12 is connected with a self-balancing regulating circuit, such as Figure 3 As shown, the self-balancing regulating circuit includes a first air supply pipeline 6-17 and a second air supply pipeline 6-20. The first air supply pipeline 6-17 is connected in series with a first solenoid valve 6-16 and a pressure reducing valve 6-15. The second air supply pipeline 6-20 is connected in series with a second solenoid valve 6-18 and an electric proportional valve 6-19. The first air supply pipeline 6-17 is connected to the air source and the upper chamber of the floating cylinder 6-12, and the second air supply pipeline 6-20 is connected to the air source and the lower chamber of the floating cylinder 6-12. The upper chamber refers to the chamber above the piston of the floating cylinder 6-12, and the lower chamber refers to the chamber below the piston of the floating cylinder 6-12. Regardless of whether the piston rod of the floating cylinder 6-12 is set upward or downward, the first air supply pipeline 6-17 is connected to the upper chamber, and the second air supply pipeline 6-20 is connected to the lower chamber. After the first air supply pipeline 6-17 and the second air supply pipeline 6-20 are connected in parallel, they are connected to the air source through the filter pressure reducing valve 6-14.
[0035] like Figure 3 As shown, the floating cylinder 6-12 is realized by adjusting the air intake through the pressure regulating valve, so that the gravity of the supported workpiece and the lifting force are balanced, and even if the grinding disc is worn, it can still be effectively and smoothly ground. The control method of the floating cylinder 6-12 controls the pressure on the rod side of the floating cylinder 6-12 through the pressure reducing valve 6-15 and the first solenoid valve 6-16; the air pressure on the rodless side is controlled by the second solenoid valve 6-18 and the electrical proportional valve 6-19. After the pressure reducing valve 6-15 and the electrical proportional valve 6-19 set the intake pressure respectively, the grinding disc 6-2 contacts the surface of the workpiece, and the grinding work begins. During the grinding process, when the grinding disc 6-2 is worn, the grinding disc 6-2 and the workpiece will A gap is created, and then due to the gravity of the grinding mechanism, the grinding sheet 6-2 is pressed against the profile again, and then the extended rod of the floating cylinder 6-12 will retract a little bit, and the pressure in the lower chamber of the floating cylinder will fluctuate. At this time, the electrical proportional valve will detect the pressure fluctuation and can adjust the air pressure by itself. The electrical proportional valve 6-19 reduces the intake pressure, while the pressure reducing valve 6-15 maintains the original pressure. At this time, the pressure imbalance at both ends will cause the pressure on the rod side to increase and press downward, so as to achieve pressure balance after the grinding sheet is in contact with the surface of the workpiece.
[0036] The grinding sheet 6-2 is in a horizontal state, so it is convenient to replace the grinding sheet, and the angle of the grinding sheet 6-2 is adjusted by the angle adjustment cylinder 6-10.
[0037] Working principle: two door frames or two window frames are fixed on the workbench 3 by the door and window positioning device, the position of the grinding device 6 is adjusted by adjusting the moving mechanism, the angle of the grinding sheet is adjusted by the angle adjustment cylinder 6-10, and the pressing force of the grinding sheet 6-2 on the working surface is controlled by moving the motor up and down. When the grinding sheet 6-2 is worn, the floating cylinder 6-12 automatically adjusts the position of the grinding sheet. When changing the sheet, adjust the level of the grinding sheet 6-2 by the angle adjustment cylinder 6-10, move the grinding device 6 to the grinding sheet barrel 5-8, adjust the grinding sheet barrel 5-8 to be opposite to the grinding sheet on the grinding motor 6-1 by extending the cylinder 5-7, open the grinding sheet clamp, and push the grinding sheet clamp to clamp the grinding sheet by the clamping extension cylinder 5-4. The clamping cylinder 5-5 controls the clamping. When the clamping extension cylinder 5-4 is retracted, the grinding sheet is torn off, and the grinding sheet ejection cylinder 5-9 is extended to eject the new grinding sheet from the grinding sheet barrel 5-8 so that it is attached to the position where the grinding sheet is installed on the grinding motor 6-1.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A flexible suspension grinding device for welding seams of aluminum profiles, comprising a frame, a workbench arranged on the frame, and a grinding device arranged on the frame, wherein the grinding device is arranged on the frame in an adjustable manner in three directions: up and down, left and right, and front and back, and a door and window positioning device is arranged on the workbench, characterized in that: The door and window positioning device comprises two sets of door and window positioning blocks, each set of door and window positioning blocks comprises two fixed backing plates and two movable pressing plates, and the two sets of door and window positioning blocks share one fixed backing plate and one movable pressing plate; The grinding device comprises a grinding frame, a grinding motor arranged on the grinding frame and a grinding sheet arranged on the main shaft of the grinding motor. The grinding motor is arranged on the grinding frame through a floating mechanism and an angle adjustment mechanism. The floating mechanism comprises a floating plate arranged on the grinding frame for sliding up and down and a floating cylinder for pushing the floating plate to slide up and down on the grinding frame. The angle adjustment mechanism comprises a motor connecting plate for installing the grinding motor and an angle adjustment cylinder. The motor connecting plate is connected to the floating plate for rotating up and down. Both ends of the angle adjustment cylinder are respectively hinged to the floating plate and the motor connecting plate. The angle adjustment cylinder is used to push the motor connecting plate to rotate up and down on the floating plate. The cylinder body of the floating cylinder is fixed to the lower part of the grinding frame, the piston rod of the floating cylinder faces upward, and the floating plate is connected to the piston rod of the floating cylinder; or: the cylinder body of the floating cylinder is fixed to the upper part of the grinding frame, the piston rod of the floating cylinder faces downward, and the floating plate is connected to the piston rod of the floating cylinder; The floating cylinder is connected to a self-balancing regulating circuit, which includes a first air supply pipeline and a second air supply pipeline. The first air supply pipeline is connected in series with a first solenoid valve and a pressure reducing valve, and the second air supply pipeline is connected in series with a second solenoid valve and an electrical proportional valve. The first air supply pipeline connects the air source and the upper chamber of the floating cylinder, and the second air supply pipeline connects the air source and the lower chamber of the floating cylinder. The first air supply pipeline and the second air supply pipeline are connected in parallel and then connected to the air source through a filter pressure reducing valve.
2. The aluminum profile welding seam flexible suspension grinding equipment according to claim 1 is characterized in that: The door and window positioning device includes three fixed backing plates and three movable clamping plates, the three fixed backing plates are a first fixed backing plate, a second fixed backing plate and a third fixed backing plate, the three movable clamping plates are a first movable clamping plate, a second movable clamping plate and a third movable clamping plate, the three fixed backing plates are all fixed on a workbench, and the three movable clamping plates are all arranged on the workbench by a driving mechanism and can be moved up and down, the first fixed backing plate is provided with a first positioning surface, the second fixed backing plate is provided with a second positioning surface, the third fixed backing plate is provided with a third positioning surface and a fourth positioning surface which are opposite to each other, the first positioning surface and the third positioning surface form a right-angle positioning surface, the second positioning surface and the fourth positioning surface form a right-angle positioning surface, the first positioning surface and the second positioning surface are in the same plane or parallel, the second movable clamping plate is used to clamp the frame edges of two doors and windows positioned on the third positioning surface and the fourth positioning surface, and the first movable clamping plate and the third movable clamping plate are respectively used to clamp the frame edges of two doors and windows facing the third positioning surface and the fourth positioning surface.
3. The aluminum profile welding seam flexible suspension grinding equipment according to claim 2 is characterized in that: The three movable clamping plates are all arranged on the workbench through a clamping cylinder, the cylinder body of the clamping cylinder is fixed on the lower side of the bottom surface of the workbench, and the three movable clamping plates are respectively fixed on the piston rods of the corresponding clamping cylinders. The three movable clamping plates are located above the workbench.
4. The aluminum profile welding seam flexible suspension grinding equipment according to claim 1 is characterized in that: Two parallel vertical guide shafts are fixed on the grinding frame, shaft sleeves are arranged on the guide shafts, the floating plate is fixedly connected with the two shaft sleeves, and the angle adjustment cylinder is located between the two guide shafts.
5. The aluminum profile welding seam flexible suspension grinding equipment according to claim 1 is characterized in that: The frame is provided with a left-right movable seat for moving left-right, the left-right movable seat is provided with a front-back movable seat for moving front-back, the front-back movable seat is provided with an upper and lower movable plate for moving up and down, and the grinding frame is arranged on the upper and lower movable plates for rotating left-right.
6. The aluminum profile welding seam flexible suspension grinding equipment according to claim 1 is characterized in that: The invention comprises a sheet changing mechanism arranged at the lower side of the workbench, the sheet changing mechanism comprises a sheet grinding barrel and a sheet clamping mechanism, the sheet grinding barrel and the sheet clamping mechanism are arranged on a movable plate, the movable plate is connected to an extending cylinder which drives the movable plate to move left and right, a sheet grinding bearing plate is arranged in the sheet grinding barrel, a sheet grinding bearing plate is arranged below the sheet grinding bearing plate, a sheet grinding bearing plate ejecting cylinder which drives the sheet grinding bearing plate to be lifted and lowered is arranged, the sheet clamping mechanism comprises a sheet grinding clamp which is controlled to open and close up and down by a cylinder, the sheet grinding clamp is connected to a clamping extending cylinder which controls the horizontal movement of the sheet grinding clamp, and a sheet changing operation channel is arranged above the sheet grinding barrel.