Double-sided polishing device for door and window frame

Abstract

The double-face grinding device for the door and window frame relates to the field of door and window grinding and comprises a grinding cylinder, a circular tool groove is formed in the top face of the grinding cylinder, a lower grinding disc is rotatably arranged in the grinding cylinder, the rotating axis of the lower grinding disc is vertically arranged, and a top face grinding mechanism is arranged above the grinding cylinder. The top face grinding mechanism comprises a rotationally-arranged upper grinding disc, the upper grinding disc and the lower grinding disc are coaxially arranged, the upper grinding disc has the freedom degree of moving in the axial direction of the grinding barrel, four sets of adjustable limiting mechanisms are evenly distributed on the side wall of the circular tool groove in the circumferential direction of the grinding barrel, and each adjustable limiting mechanism comprises a sliding rod and an abutting block. The sliding rod is slidably arranged on the grinding cylinder in a penetrating mode and has the freedom degree of moving along the center of the rectangular tool groove, the end, close to the circle center of the grinding cylinder, of the sliding rod is fixedly provided with an abutting block, the tool is located on the outer wall of the door and window frame, the upper grinding face and the lower grinding face of the door and window frame are completely exposed, double-face grinding of the door and window frame is completed, and the grinding efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of door and window grinding, and specifically to a double-sided grinding device for door and window frames. Background Art

[0002] In the field of building door and window manufacturing, the processing quality of door and window frames has a crucial impact on the overall performance and service life of doors and windows. As one of the key processes in door and window frame processing, grinding aims to remove burrs and defects on the frame surface, making the surface smooth and flat, and laying a good foundation for subsequent processes such as painting and assembly. Door and window frames are generally formed into rectangular frames by means of split splicing or integral casting. For split manufacturing, the surface of each component needs to be ground, and for integral casting, the entire rectangular frame needs to be ground. However, there will be some unevenness or burrs on the surface of the cast aluminum. Therefore, grinding operations are essential. Currently, the grinding method is to clamp the door and window frame through a tooling mechanism, and then gradually grind the exposed upper surface with a grinding head. Then, the tooling method is changed to make the bottom surface of the door and window frame face up, and finally, the side surfaces of the rectangular frame are ground. The upper and lower surfaces of the rectangular frame need to be ground in multiple times and cannot be ground into shape at one time. This grinding method has low efficiency, requires workers to frequently adjust the tooling position of the door and window frame, has a large labor intensity, and the grinding efficiency needs to be further improved. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a double-sided grinding device for door and window frames to solve the deficiencies of the prior art.

[0004] The purpose of the present invention is achieved through the following technical solutions: A double-sided grinding device for door and window frames, including a grinding cylinder. A circular tooling groove is opened on the top surface of the grinding cylinder. A lower grinding disk is rotatably arranged inside the grinding cylinder, and the rotation axis of the lower grinding disk is vertically arranged. A top surface grinding mechanism is arranged above the grinding cylinder. The top surface grinding mechanism includes a rotatably arranged upper grinding disk, and the upper grinding disk is coaxially arranged with the lower grinding disk. The upper grinding disk has a degree of freedom to move along the axial direction of the grinding cylinder. Four groups of adjustable limiting mechanisms are evenly arranged along the circumferential direction of the side wall of the circular tooling groove. The adjustable limiting mechanism includes a sliding rod and an abutting block. The sliding rod is slidably inserted through the grinding cylinder, and the sliding rod has a degree of freedom to move along the center of the rectangular tooling groove. An abutting block is fixed at one end of the sliding rod close to the center of the grinding cylinder;

[0005] Multiple groups of grinding control mechanisms are arranged in the circular tooling groove. The multiple groups of grinding control mechanisms are evenly distributed along the circumferential direction of the grinding cylinder. The grinding control mechanism includes a high-precision displacement sensor and a control board. The control board has a degree of freedom to move along the axial direction of the grinding cylinder. The control board is located on the moving path of the upper grinding disc. The high-precision position sensor is installed directly below the control board.

[0006] Further, the adjustable limit mechanism further includes a rack, a ratchet shaft and a pawl. A through hole is provided in the side wall of the grinding cylinder at the position where the sliding rod is arranged. The sliding rod slides through the through hole. The ratchet shaft is located in the through hole and is rotatably connected to the grinding cylinder. A rack is fixed on the sliding rod. A gear and a ratchet are sleeved on the ratchet shaft. The gear meshes with the rack. The ratchet cooperates with the pawl. The cooperation between the pawl and the ratchet enables the sliding rod to move only unidirectionally close to the center of the rectangular tooling groove.

[0007] Further, a deflection shaft is slidably penetrated through the pawl. An installation hole is provided in the inner bottom wall of the through hole. A torsion spring is fixedly sleeved at the bottom of the deflection shaft. The deflection shaft is assembled in the installation hole. Two foot holes are provided in the inner wall of the installation hole. Two torsion feet of the torsion spring are respectively adapted in the two foot holes. A limit shaft is arranged between the pawl and the ratchet. The limit shaft is fixedly connected to the grinding cylinder. When the pawl is adapted in the ratchet groove of the ratchet, the limit shaft contacts the pawl.

[0008] Further, the adjustable limit mechanism further includes a hollow downward pressure shaft and a spring. The hollow downward pressure shaft is coaxial with the deflection shaft, and the inner hole diameter of the hollow downward pressure shaft is larger than the diameter of the deflection shaft. An unlocking spring is sleeved on the deflection shaft. A spring disc is fixedly sleeved on the deflection shaft. The spring disc is located below the pawl. Two ends of the unlocking spring are respectively connected to the spring disc and the pawl. A stepped groove is provided at the top of the grinding cylinder. The hollow downward pressure shaft slides through the stepped groove. A spring mounting plate is fixed on the hollow downward pressure shaft. The spring is sleeved on the hollow downward pressure shaft. One end of the spring is connected to the spring mounting plate, and the other end is connected to the step of the stepped groove.

[0009] Further, the adjustable limit mechanism further includes a return spring. The return spring is arranged outside the grinding cylinder. Two ends of the return spring are respectively connected to the grinding cylinder and the sliding rod.

[0010] Further, the grinding control mechanism further includes a lead screw. An annular cavity is provided in the grinding cylinder. The circular tooling groove is located inside the annular cavity. The lead screw is vertically arranged in the annular cavity. The lead screw is rotatably connected to the grinding cylinder. A lead screw slider is threadedly sleeved on the lead screw. A vertical groove is provided in the inner wall of the circular tooling groove. The vertical groove communicates with the annular cavity. One end of the control board penetrates into the annular cavity through the vertical groove to connect the lead screw slider. A pressure sensor is embedded on the top surface of the control board.

[0011] Further, an internal gear ring is rotatably arranged in the annular cavity. An external gear ring is fixedly sleeved on the internal gear ring. A driving gear is sleeved on the lead screw. The driving gear meshes with the internal gear ring. A driving motor is installed on the outer wall of the grinding cylinder. A driving window communicating with the annular cavity is formed on the outer wall of the grinding cylinder. An output shaft of the driving motor is connected with a driving gear, and the driving gear meshes with the external gear ring.

[0012] Further, the top surface grinding mechanism further includes a lifting cross beam, a lifting mounting plate and a pressure detection ring. The lifting mounting plate is arranged below the lifting cross beam. The upper grinding disc is rotatably installed on the lifting mounting plate. The pressure detection ring is rotatably sleeved on the upper grinding disc. The pressure detection ring is fixedly connected with the lifting mounting plate through a connecting rod.

[0013] Further, a first cylinder is vertically installed on the lifting cross beam. A telescopic shaft of the first cylinder is connected with the lifting cross beam. A grinding main shaft is coaxially fixed on the top of the upper grinding disc. The grinding main shaft is rotatably connected with the lifting mounting plate through a bearing. A grinding gear is sleeved on the grinding main shaft. A grinding motor is installed on the lifting mounting plate. An output shaft of the grinding motor is connected with a main grinding gear, and the main grinding gear meshes with the grinding gear.

[0014] Further, the top surface grinding mechanism further includes a main support column. A second cylinder is arranged in the main support column. A telescopic shaft of the second cylinder is connected with the lifting cross beam.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The grinding tooling is arranged on the outer wall of the door and window frame. The abutting blocks of the four groups of adjustable limiting mechanisms respectively contact the four outer side walls of the door and window frame to maintain the stability of the door and window frame. Secondly, the upper grinding disc and the lower grinding disc respectively contact the upper and lower surfaces of the door and window frame for grinding. At the same time, the upper grinding disc and the lower grinding disc also play a limiting role on the door and window frame, so that the door and window frame will not shift up and down. Further, the tooling of the abutting blocks enables the door and window frame not to shift left and right, maintaining the grinding stability. The working position of the tooling is on the outer wall of the door and window frame, so that the upper and lower grinding surfaces of the door and window frame can be completely exposed, and at the same time, the double sides of the door and window frame are ground, with high grinding efficiency.

[0017] 2. The high-precision displacement sensor and pressure sensor in the grinding control mechanism can control the grinding amount of the door and window frame. Through transmission structures such as the lead screw, internal gear ring, and external gear ring, the height of the control board can be accurately adjusted, and further the downward displacement distance of the upper grinding disc can be accurately controlled, avoiding the situation of excessive or insufficient grinding.

[0018] 3. The application of power components such as drive motors and cylinders realizes the automated operation of multiple links in the grinding process, including positioning, grinding, and control. The device can flexibly adjust the working parameters of each component through the control system according to the specifications and grinding requirements of different door and window frames, with strong adaptability and flexibility, and can well meet the production needs of high efficiency, precision, and flexibility in modern door and window manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural view of a double-sided grinding device for a door and window frame according to the present invention Figure 1 ;

[0020] Figure 2 is Figure 2 an enlarged view at C in

[0021] Figure 3 is Figure 2 an enlarged view at D in

[0022] Figure 4 is a schematic structural view of a double-sided grinding device for a door and window frame according to the present invention Figure 2 ;

[0023] Figure 5 is a schematic structural view of a grinding cylinder in a double-sided grinding device for a door and window frame according to the present invention;

[0024] Figure 6 is Figure 5 a sectional view taken along the line A-A in

[0025] Figure 7 is Figure 6 an enlarged view at E in

[0026] Figure 8 is Figure 5 a sectional view taken along the line B-B in

[0027] Figure 9 is Figure 8 an enlarged view at F in

[0028] Figure 10 is a schematic structural view of a deflection shaft in a double-sided grinding device for a door and window frame according to the present invention;

[0029] In the figure, 1 - grinding cylinder, 2 - circular tooling groove, 3 - lower grinding disc, 4 - upper grinding disc, 5 - sliding rod, 6 - abutting block, 7 - high-precision position sensor, 8 - control board, 9 - rack, 10 - ratchet shaft, 11 - pawl, 12 - through hole, 13 - gear, 14 - ratchet, 15 - deflection shaft, 16 - limiting shaft, 17 - hollow downward pressure shaft, 18 - spring, 19 - stepped groove, 20 - spring mounting plate, 21 - return spring, 22 - lead screw, 23 - annular cavity, 24 - lead screw slider, 25 - vertical groove, 26 - pressure sensor, 27 - internal gear ring, 28 - external gear ring, 29 - driving gear, 30 - driving motor, 31 - driving gear, 32 - lifting cross beam, 33 - lifting mounting plate, 34 - pressure detection ring, 35 - connecting rod, 36 - first cylinder, 37 - grinding spindle, 38 - grinding gear, 39 - grinding motor, 40 - main grinding gear, 41 - main support column, 42 - second cylinder, 43 - unlocking spring, 44 - spring disc. Detailed implementation mode

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] Embodiment 1

[0032] As Figures 1 to 10As shown in the figure, a double-sided grinding device for a door and window frame includes a grinding cylinder 1. A circular tooling groove 2 is formed in the top surface of the grinding cylinder 1. A lower grinding disc 3 is rotatably arranged in the grinding cylinder 1. The rotation axis of the lower grinding disc 3 is vertically arranged. A top surface grinding mechanism is arranged above the grinding cylinder 1. The top surface grinding mechanism includes a rotatably arranged upper grinding disc 4. The upper grinding disc 4 is coaxially arranged with the lower grinding disc 3. The upper grinding disc 4 has a degree of freedom to move along the axial direction of the grinding cylinder 1. Four groups of adjustable limiting mechanisms are evenly arranged along the circumferential direction of the side wall of the circular tooling groove 2. The adjustable limiting mechanism includes a sliding rod 5 and an abutting block 6. The sliding rod 5 is slidably inserted through the grinding cylinder 1. The sliding rod 5 has a degree of freedom to move along the center of the rectangular tooling groove 2. An abutting block 6 is fixed at one end of the sliding rod 5 close to the center of the grinding cylinder 1. Place the door and window frame in the circular tooling groove 2 so that the four side walls of the door and window frame roughly correspond to the four groups of adjustable limiting mechanisms. Then move the sliding rods 5 of the four groups of adjustable limiting mechanisms in sequence so that the abutting blocks 6 contact the outer side walls of the door and window frame. The thickness of the abutting block 6 is less than the thickness of the door and window frame after grinding. The top surface of the abutting block 6 is located below the top surface of the door and window frame, and the bottom surface of the abutting block 6 does not contact the lower grinding disc 3. After the door and window frame is tooled, the top and bottom surfaces of the door and window frame are in a completely exposed state. Then the upper grinding disc 4 moves downward so that the upper grinding disc 4 and the lower grinding disc 3 respectively contact the upper and lower surfaces of the door and window frame for grinding. At the same time, the upper grinding disc 4 and the lower grinding disc 3 also play a limiting role on the door and window frame, so that the door and window frame will not shift up and down. Then, through the tooling of the abutting block 6, the door and window frame will not shift left and right, maintaining the grinding stability. The tooling position is on the outer wall of the door and window frame, so that the upper and lower grinding surfaces of the door and window frame can be completely exposed, and at the same time, the double sides of the door and window frame are ground, with a high grinding efficiency. Specifically, a lower main shaft is coaxially fixed at the bottom of the lower grinding disc 3. The lower main shaft is rotatably connected to the grinding cylinder 1. The lower main shaft is driven by a motor, so that the lower grinding disc 3 rotates at a high speed to complete the grinding of the bottom surface of the door and window frame.

[0033] Embodiment 2

[0034] On the basis of Embodiment 1, as Figures 1 to 4As shown in the figure, multiple sets of grinding control mechanisms are arranged in the circular tooling groove 2. The multiple sets of grinding control mechanisms are evenly distributed along the circumferential direction of the grinding cylinder 1. The grinding control mechanism includes a high-precision displacement sensor 7 and a control board 8. The control board 8 has the freedom to move axially along the grinding cylinder 1. The control board 8 is located on the moving path of the upper grinding disc 4. The high-precision position sensor 7 is installed directly below the control board 8. To achieve the precision grinding of the door and window frame and avoid over-grinding or insufficient grinding amount, the grinding amount is controlled by multiple sets of grinding control mechanisms to achieve the precise grinding of the door and window frame. Specifically, first, the upper grinding disc 4 is moved downward to contact the door and window frame, and then the control board 8 is moved upward to contact the bottom surface of the upper grinding disc 4. The height position of the control board 8 at this time is measured by the high-precision position sensor 7, which is the initial positioning point. Then, the control board 8 is moved downward according to the specified grinding amount of the door and window frame. The moving precision of the control board 8 is feedback by the high-precision position sensor 7. When the moving amount of the control board 8 is equal to the grinding amount of the door and window frame, the movement of the control board 8 is stopped, that is, the control of the grinding amount is completed. During the process of grinding the door and window frame, the upper grinding disc 4 will gradually move downward to grind the door and window frame. When the upper grinding disc 4 contacts the control board 8, the upper grinding disc 4 is blocked by the control board 8 and cannot continue to move downward. Thus, the grinding precision of the door and window frame is controlled by mechanical limiting, which improves the grinding precision.

[0035] Embodiment Three

[0036] On the basis of Embodiment Two, as Figures 1 to 8As shown, the grinding control mechanism further includes a lead screw 22. An annular cavity 23 is provided inside the grinding cylinder 1. The circular tooling groove 2 is located inside the annular cavity 23. The lead screw 22 is vertically arranged in the annular cavity 23. The lead screw 22 is rotationally connected to the grinding cylinder 1. A lead screw slider 24 is threadedly sleeved on the lead screw 22. A vertical groove 25 is formed on the inner wall of the circular tooling groove 2. The vertical groove 25 communicates with the annular cavity 23. One end of the control board 8 passes through the vertical groove 25 into the annular cavity 23 to connect the lead screw slider 24. A pressure sensor 26 is embedded on the top surface of the control board 8. An internal gear ring 27 is rotatably arranged in the annular cavity 23. An external gear ring 28 is fixedly sleeved on the internal gear ring 27. A driving gear 29 is sleeved on the lead screw 22. The driving gear 29 meshes with the internal gear ring 27. A driving motor 30 is installed on the outer wall of the grinding cylinder 1. A driving window communicating with the annular cavity 23 is formed on the outer wall of the grinding cylinder 1. The output shaft of the driving motor 30 is connected with a driving gear 31. The driving gear 31 meshes with the external gear ring 28. By driving the driving gear 31 to rotate through the driving motor 30, the driving gear 31 drives the internal gear ring 27 to rotate through the engagement with the external gear ring 28. The internal gear ring 27 drives the driving gears 29 of multiple groups of grinding control mechanisms to rotate. The driving gears 29 drive the lead screw 22 to rotate. Since the control board 8 is slidably matched with the vertical groove 25, the rotational freedom of the control board 8 is restricted, so that the lead screw slider 24 can drive the control board 8 to move linearly along the axial direction of the lead screw 22, completing the adjustment of the height position of the control board 8. When setting the grinding amount, the control board 8 moves upward. Whether the control board 8 contacts the upper grinding disc 4 is judged through the pressure value detected by the pressure sensor 26, and the initial positioning point can be accurately determined. Then, the driving motor 30 rotates reversely to drive the control board 8 to move downward. The downward movement amount of the control board 8 is detected through the high-precision position sensor 7, so that the grinding amount of the door and window frame can be accurately adjusted, and the grinding precision is relatively high.

[0037] Embodiment Four

[0038] On the basis of Embodiment Three, as Figures 1 to 4As shown in the figure, the top surface grinding mechanism further includes a lifting cross beam 32, a lifting mounting plate 33 and a pressure detection ring 34. A lifting mounting plate 33 is arranged below the lifting cross beam 32. The upper grinding disc 4 is rotatably mounted on the lifting mounting plate 33. The pressure detection ring 34 is rotatably sleeved on the upper grinding disc 4. The pressure detection ring 34 is fixedly connected to the lifting mounting plate 33 through a connecting rod 35. During the grinding process, the upper grinding disc 4 is in a high-speed rotation state. When the upper grinding disc 4 contacts the control board 8 and the high-precision position sensor 7, the control board 8 and the high-precision position sensor 7 will be worn, resulting in the damage and failure of the high-precision position sensor 7. Therefore, a pressure detection ring 34 is rotatably sleeved on the upper grinding disc 4. The bottom surface of the pressure detection ring 34 is flush with the bottom surface of the upper grinding disc 4. The pressure detection ring 34 is connected to the lifting mounting plate 33 through a connecting rod 35, restricting the rotational freedom of the pressure detection ring 34, and the pressure detection ring 34 does not affect the rotation of the upper grinding disc 4. By the pressure detection ring 34 contacting the detection shaft of the high-precision position sensor 7, the grinding position control of the upper grinding disc 4 is completed without damaging the high-precision position sensor 7, realizing high-precision grinding operation.

[0039] Furthermore, a first cylinder 36 is vertically installed on the lifting cross beam 32. The telescopic shaft of the first cylinder 36 is connected to the lifting cross beam 32. The top of the upper grinding disc 4 is coaxially fixed with a grinding main shaft 37. The grinding main shaft 37 is rotatably connected to the lifting mounting plate 33 through a bearing. A grinding gear 38 is sleeved on the grinding main shaft 37. A grinding motor 39 is installed on the lifting mounting plate 33. The output shaft of the grinding motor 39 is connected with a grinding main gear 40. The grinding main gear 40 meshes with the grinding gear 38. The top surface grinding mechanism further includes a main support column 41. A second cylinder 42 is arranged inside the main support column 41. The telescopic shaft of the second cylinder 42 is connected to the lifting cross beam 32. The grinding motor 39 drives the grinding main shaft 37 to rotate through the meshing of the grinding main gear 40 and the grinding gear 38. The grinding main shaft 37 drives the upper grinding disc 4 to rotate to complete the grinding of the top surface of the door and window frame. During feeding, the second cylinder 42 drives the lifting cross beam 32 to move downward, so that there is enough space between the upper grinding disc 4 and the lower grinding disc 3 for the door and window frame to be fed into the circular tooling groove 2. After the door and window frame is fed, the second cylinder 42 drives the upper grinding disc 4 to move downward, so that the upper grinding disc 4 quickly approaches the door and window frame downward. At the same time, the first cylinder 36 drives the lifting mounting plate 33 to move downward, so that the upper grinding disc 4 slowly moves downward to determine the grinding amount. The hydraulic value of the first cylinder 36 is used to judge whether the pressure detection ring 34 contacts the high-precision position sensor 7 on the control board 8, and then the grinding amount is determined by moving the control board 8. Finally, the grinding motor 39 is started, and the first cylinder 36 drives the upper grinding disc 4 to move downward to complete the grinding operation of the door and window frame.

[0040] Example Five

[0041] On the basis of Example Four, asFigures 1 to 10 As shown in the figure, the adjustable limit mechanism further includes a rack 9, a ratchet shaft 10 and a pawl 11. A through hole 12 is provided on the side wall of the grinding cylinder 1 at the position where the sliding rod 5 is arranged. The sliding rod 5 slides through the through hole 12. The ratchet shaft 10 is located in the through hole 12 and is rotatably connected to the grinding cylinder 1. A rack 9 is fixed on the sliding rod 5. A gear 13 and a ratchet 14 are sleeved on the ratchet shaft 10. The gear 13 meshes with the rack 9. The ratchet 14 cooperates with the pawl 11. The cooperation between the pawl 11 and the ratchet 14 enables the sliding rod 5 to move only unidirectionally closer to the center of the rectangular tooling groove 2. A deflecting shaft 15 slides through the pawl 11. An installation hole is provided on the inner bottom wall of the through hole 12. A torsion spring is fixedly sleeved at the bottom of the deflecting shaft 15. The deflecting shaft 15 is assembled in the installation hole. Two foot holes are provided on the inner wall of the installation hole. The two torsion feet of the torsion spring are respectively fitted in the two foot holes. A limit shaft 16 is arranged between the pawl 11 and the ratchet 14. The limit shaft 16 is fixedly connected to the grinding cylinder 1. When the pawl 11 is fitted in the ratchet groove of the ratchet 14, the limit shaft 16 contacts the pawl 11. The cooperation between the pawl 11 and the ratchet 14 restricts the freedom of the sliding rod 5 to move outward, so that the sliding rod 5 can only move inward, that is, the sliding rod 5 can only move closer to the center of the grinding cylinder 1. Initially, the area of the region surrounded by the abutting blocks 6 of the four groups of adjustable limit mechanisms is larger than the size of the door and window frame. The door and window frame is placed between the abutting blocks 6. Push one end of the sliding rod 5 on the outside of the grinding cylinder 1, so that the sliding rod 5 drives the gear 13 to rotate through the rack 9. The gear 13 drives the ratchet shaft 10 to rotate. The ratchet shaft 10 drives the ratchet 14 to rotate. Since the ratchet 14 moves in the forward direction, the pawl 11 can adapt to deflection, so that the deflecting shaft 15 compresses the torsion spring and deflects, and further enables the sliding rod 5 to move smoothly closer to the door and window frame. When the sliding rod 5 contacts the door and window frame, stop moving the sliding rod 5. The deflecting shaft 15 drives the pawl 11 to reset under the reaction force of the torsion spring, so that the pawl 11 is fitted in the ratchet groove of the ratchet 14, thereby locking the freedom of the sliding rod 5 to move in the reverse direction. When the sliding rod 5 moves outward, the ratchet 14 needs to rotate in the reverse direction, and the reverse rotation of the ratchet 14 will interfere with the pawl 11, thereby restricting the reverse rotation of the ratchet 14, and thus driving to restrict the freedom of the sliding rod 5 to move outward. When the abutting block 6 contacts the door and window frame, the freedom of the sliding rod 5 to move inward is restricted by the door and window frame, and the freedom of the sliding rod 5 to move outward is restricted by the ratchet 14, so that the position of the sliding rod 5 can be locked, and further the effect of driving the tooling door and window frame can be achieved. The limit shaft 16 mainly bears the pressure generated by the pawl 11 when the ratchet 14 rotates in the reverse direction, avoiding the force-bearing position of the ratchet 14 and the pawl 11 at the mating part of the ratchet groove, and prolonging the service life of the ratchet 14 and the pawl 11.

[0042] Embodiment Six

[0043] On the basis of Embodiment Five, the adjustable limit mechanism further includes a hollow downward pressing shaft 17 and a spring 18. The hollow downward pressing shaft 17 is coaxial with the deflection shaft 15, and the inner hole diameter of the hollow downward pressing shaft 17 is larger than the diameter of the deflection shaft 15. An unlocking spring 43 is sleeved on the deflection shaft 15, and a spring disc 44 is fixedly sleeved on the deflection shaft 15. The spring disc 44 is located below the pawl 11. The two ends of the unlocking spring 43 are respectively connected to the spring disc 44 and the pawl 11. A stepped groove 19 is formed at the top of the grinding cylinder 1. The hollow downward pressing shaft 17 slidably passes through the stepped groove 19. A spring mounting plate 20 is fixed on the hollow downward pressing shaft 17. The spring 18 is sleeved on the hollow downward pressing shaft 17. One end of the spring 18 is connected to the spring mounting plate 20, and the other end is connected to the step of the stepped groove 19. The adjustable limit mechanism further includes a return spring 21. The return spring 21 is arranged outside the grinding cylinder 1. The two ends of the return spring 21 are respectively connected to the grinding cylinder 1 and the sliding rod 5. A guiding groove is formed in the side wall of the deflection shaft 15 along its own axial direction. A guiding tooth is fixed in the inner hole of the pawl 11. The guiding tooth is slidably fitted in the guiding groove, so that there is only a linear movement degree of freedom between the deflection shaft 15 and the pawl 11, and there is no rotational degree of freedom, ensuring that the position of the pawl 11 will not deviate, so that the pawl 11 can cooperate with the ratchet 14 smoothly. During tooling, the sliding rod 5 is moved inward. When the sliding rod 5 moves, the return spring 21 will be compressed. After grinding is completed, the top surface grinding mechanism moves upward and then presses the hollow downward pressing shaft 17 downward, so that the hollow downward pressing shaft 17 squeezes the spring 18 and moves downward. The hollow downward pressing shaft 17 pushes the pawl 11 downward. When the pawl 11 moves downward, the unlocking spring 43 will be compressed, so that the pawl 11 disengages from the ratchet 14, breaking the cooperation state between the ratchet 14 and the pawl 11, thereby unlocking the reverse rotation degree of freedom of the ratchet 14. At this time, under the reaction force of the return spring 21, the sliding rod 5 moves outward, so that the sliding rod 5 can be reset to loosen the window frame and wait for tooling of the next window frame. After the sliding rod 5 is reset, the hollow downward pressing shaft 17 is released. The hollow downward pressing shaft 17 is reset upward under the reaction force of the spring 18, and the pawl 11 is reset under the reaction force of the unlocking spring 43, so that the pawl 11 cooperates with the ratchet 14 again, so that the next window frame can be tooled. Specifically, during implementation, the installation position of the hollow downward pressing shaft 17 is located outside the annular cavity 23 to avoid interference between the hollow downward pressing shaft 17 and the external gear ring 28, so that the grinding control mechanism and the adjustable limit mechanism will not interfere with each other.

Claims

1. A double-sided grinding device for a door and window frame, characterized in that, It includes a grinding cylinder (1). A circular tooling groove (2) is provided on the top surface of the grinding cylinder (1). A lower grinding disc (3) is rotatably arranged in the grinding cylinder (1). The rotation axis of the lower grinding disc (3) is vertically arranged. A top surface grinding mechanism is provided above the grinding cylinder (1). The top surface grinding mechanism includes a rotatably arranged upper grinding disc (4). The upper grinding disc (4) is coaxially arranged with the lower grinding disc (3). The upper grinding disc (4) has a degree of freedom of moving along the axial direction of the grinding cylinder (1). Four groups of adjustable limiting mechanisms are evenly distributed along the circumferential direction of the side wall of the circular tooling groove (2). The adjustable limiting mechanism includes a sliding rod (5) and an abutting block (6). The sliding rod (5) slidably penetrates through the grinding cylinder (1). The sliding rod (5) has a degree of freedom of moving along the center of the rectangular tooling groove (2). An abutting block (6) is fixed at one end of the sliding rod (5) close to the center of the grinding cylinder (1). Multiple groups of grinding control mechanisms are arranged in the circular tooling groove (2). The multiple groups of grinding control mechanisms are evenly distributed along the circumferential direction of the grinding cylinder (1). The grinding control mechanism includes a high-precision displacement sensor (7) and a control board (8). The control board (8) has a degree of freedom of moving along the axial direction of the grinding cylinder (1). The control board (8) is located on the moving path of the upper grinding disc (4). The high-precision position sensor (7) is installed directly below the control board (8).

2. The double-sided grinding device for a door and window frame according to claim 1, characterized in that, The adjustable limiting mechanism further includes a rack (9), a ratchet shaft (10) and a pawl (11). A through hole (12) is provided on the side wall of the grinding cylinder (1) at the position where the sliding rod (5) is arranged. The sliding rod (5) slidably penetrates through the through hole (12). The ratchet shaft (10) is located in the through hole (12) and is rotatably connected to the grinding cylinder (1). A rack (9) is fixed on the sliding rod (5). A gear (13) and a ratchet (14) are sleeved on the ratchet shaft (10). The gear (13) meshes with the rack (9). The ratchet (14) cooperates with the pawl (11). The cooperation between the pawl (11) and the ratchet (14) enables the sliding rod (5) to move only unidirectionally close to the center of the rectangular tooling groove (2).

3. The double-sided grinding device for a door and window frame according to claim 2, characterized in that, A deflecting shaft (15) slidably penetrates through the pawl (11). An installation hole is provided on the inner bottom wall of the through hole (12). A torsion spring is fixedly sleeved at the bottom of the deflecting shaft (15). The deflecting shaft (15) is assembled in the installation hole. Two foot holes are provided on the inner wall of the installation hole. The two torsion feet of the torsion spring are respectively fitted in the two foot holes. A limiting shaft (16) is arranged between the pawl (11) and the ratchet (14). The limiting shaft (16) is fixedly connected to the grinding cylinder (1). When the pawl (11) is fitted in the ratchet groove of the ratchet (14), the limiting shaft (16) contacts the pawl (11).

4. A double-sided grinding device for a door and window frame according to claim 3, characterized in that, The adjustable limit mechanism further includes a hollow downward pressing shaft (17) and a spring (18). The hollow downward pressing shaft (17) is coaxial with the deflection shaft (15), and the inner hole diameter of the hollow downward pressing shaft (17) is larger than the diameter of the deflection shaft (15). An unlocking spring (43) is sleeved on the deflection shaft (15), and a spring disc (44) is fixedly sleeved on the deflection shaft (15). The spring disc (44) is located below the pawl (11). The two ends of the unlocking spring (43) are respectively connected to the spring disc (44) and the pawl (11). A stepped groove (19) is formed at the top of the grinding cylinder (1). The hollow downward pressing shaft (17) slidably passes through the stepped groove (19). A spring mounting plate (20) is fixed on the hollow downward pressing shaft (17). The spring (18) is sleeved on the hollow downward pressing shaft (17). One end of the spring (18) is connected to the spring mounting plate (20), and the other end is connected to the step of the stepped groove (19).

5. A double-sided grinding device for a door and window frame according to claim 4, characterized in that The adjustable limit mechanism further includes a reset spring (21). The reset spring (21) is arranged outside the grinding cylinder (1). The two ends of the reset spring (21) are respectively connected to the grinding cylinder (1) and the sliding rod (5).

6. The double-sided grinding device for a door and window frame according to claim 1, characterized in that, The grinding control mechanism further includes a lead screw (22). An annular cavity (23) is arranged inside the grinding cylinder (1). The circular tooling groove (2) is located inside the inner ring of the annular cavity (23). The lead screw (22) is vertically arranged inside the annular cavity (23). The lead screw (22) is rotatably connected to the grinding cylinder (1). A lead screw slider (24) is threadedly sleeved on the lead screw (22). A vertical groove (25) is formed on the inner wall of the circular tooling groove (2). The vertical groove (25) communicates with the annular cavity (23). One end of the control board (8) passes through the vertical groove (25) and penetrates into the annular cavity (23) to be connected to the lead screw slider (24). A pressure sensor (26) is embedded on the top surface of the control board (8).

7. The double-sided grinding device for a door and window frame according to claim 6, wherein, An internal gear ring (27) is rotatably arranged inside the annular cavity (23). An external gear ring (28) is fixedly sleeved on the internal gear ring (27). A driving gear (29) is sleeved on the lead screw (22). The driving gear (29) meshes with the internal gear ring (27). A driving motor (30) is installed on the outer wall of the grinding cylinder (1). A driving window communicating with the annular cavity (23) is formed on the outer wall of the grinding cylinder (1). The output shaft of the driving motor (30) is connected to a driving gear (31). The driving gear (31) meshes with the external gear ring (28).

8. The double-sided grinding device for a door and window frame according to claim 1, characterized in that, The top surface grinding mechanism further includes a lifting cross beam (32), a lifting mounting disc (33) and a pressure detection ring (34). The lifting mounting disc (33) is arranged below the lifting cross beam (32). The upper grinding disc (4) is rotatably installed on the lifting mounting disc (33). The pressure detection ring (34) is rotatably sleeved on the upper grinding disc (4). The pressure detection ring (34) is fixedly connected to the lifting mounting disc (33) through a connecting rod (35).

9. The double-sided grinding device for a door and window frame according to claim 8, wherein, A first cylinder (36) is vertically installed on the lifting cross beam (32). The telescopic shaft of the first cylinder (36) is connected to the lifting cross beam (32). A grinding main shaft (37) is coaxially fixed to the top of the upper grinding disc (4). The grinding main shaft (37) is rotatably connected to the lifting mounting disc (33) through a bearing. A grinding gear (38) is sleeved on the grinding main shaft (37). A grinding motor (39) is installed on the lifting mounting disc (33). The output shaft of the grinding motor (39) is connected with a grinding main gear (40), and the grinding main gear (40) meshes with the grinding gear (38).

10. A double-sided grinding device for a door and window frame according to claim 8, characterized in that, The top surface grinding mechanism further includes a main support column (41). A second cylinder (42) is arranged inside the main support column (41). The telescopic shaft of the second cylinder (42) is connected to the lifting cross beam (32).

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