A fully automatic electromagnetic sanding center

Abstract

The present invention discloses a full-automatic electromagnetic sanding center, comprising a frame and a conveyor bed, and is characterized in that a segmented pressure roller detection unit, a transverse sanding unit, a longitudinal sanding unit, a polishing unit and a dust removal unit are sequentially arranged on the frame, and a transverse sanding unit + a longitudinal sanding unit + a longitudinal sanding unit are adopted to form a full-automatic electromagnetic sanding center. A modular design concept is adopted, and the center can be combined according to the needs of different customers. During the sanding process, this combination method can form criss-cross sanding lines on the surface of the board, eliminate the sanding lines that cannot be eliminated when there is only longitudinal sanding, and can better interrupt the fibers on the surface of the wood to obtain a better flat and smooth sanded surface.

Description

Technical Field

[0001] The invention belongs to the technical field of sanding machines, and in particular relates to a full-automatic electromagnetic sanding center. Background Art

[0002] At present, the commonly used sanding machine on the market is a fixed thickness sanding machine. Uneven boards can be turned into boards of uniform thickness after being sanded. After the surface of a flat board is covered with veneer or painted, the board will be slightly deformed such as warping. In this case, if a traditional fixed thickness sanding machine is used for sanding, sand leakage or sand leakage will occur. The electromagnetic sanding center can perform equal removal sanding according to the shape of the board surface, which can ensure that the entire surface of the board is sanded and the edges and corners of the board are not sanded.

[0003] At present, most of the fixed thickness sanding machines on the market are longitudinal sanding machines. In this way, the traces left by the sand grains of the sand belt will remain on the surface of the board. When the surface quality requirements are high, such sanding machines are difficult to meet the market demand. Criss-cross sanding can effectively improve the sanding quality of the board surface. There will be criss-cross sanding patterns during the sanding process, and when there is a thickness difference in different parts of the same workpiece, sand penetration or uneven sanding is prone to occur.

[0004] Therefore, the prior art needs further research. Summary of the invention

[0005] The purpose of the present invention is to provide a fully automatic electromagnetic sanding center, which aims to solve the problem of sanding lines, thickness differences at different parts of the same workpiece, and sanding penetration or uneven sanding at the edge of the plate.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: a fully automatic electromagnetic sanding center, including a frame and a conveyor bed, on which a segmented roller detection unit, a horizontal sanding unit, a vertical sanding unit, a polishing unit and a dust removal unit are sequentially arranged;

[0007] The segmented roller detection unit includes a roller box, a plurality of segmented roller assemblies, the segmented roller assembly includes a roller triangle plate, a detection roller, and a detection sensor arranged in the roller box, the detection sensor passes through the roller box and is arranged corresponding to the roller triangle plate;

[0008] The transverse sand unit includes a transverse sand assembly, an electromagnetic pressure beam assembly and a dust removal assembly, wherein the dust removal assembly is arranged on one side of the transverse sand assembly, the transverse sand assembly includes a sand belt assembly and a lining belt assembly, and the electromagnetic pressure beam assembly is arranged above the lining belt assembly;

[0009] The longitudinal sanding unit comprises a steel roller, a first tensioning roller and a second tensioning roller arranged from bottom to top, a lining belt is wound between the steel roller and the first tensioning roller, an abrasive belt is wound between the steel roller and the second tensioning roller, an electromagnetic pressure beam assembly is arranged between the steel roller and the first tensioning roller, a support beam is arranged below the second tensioning roller, and a guide shaft and a plurality of tensioning airbags are arranged between the support beam and the second tensioning roller;

[0010] The dust removal unit includes a cyclone assembly, which includes an air inlet pipe, a rotating sleeve and an air outlet pipe. The rotating sleeve is connected to the air inlet pipe through a bearing. The rotating sleeve, the air inlet pipe and the air outlet pipe form a ventilation channel. Cyclone holes are arranged at both ends of the air outlet pipe.

[0011] A tension spring buffer assembly is arranged at one end of the pressure roller triangle plate, and the other end is connected to the detection pressure roller. The middle part of the pressure roller triangle plate is connected to the pressure roller box by arranging a connecting block, and a linear guide rail is arranged between the pressure roller triangle plate and the pressure roller box.

[0012] The tension spring buffer assembly includes a tension spring and a spring hanger arranged on one side of the pressure roller box, one end of the tension spring is connected to the spring hanger, and the other end is connected to the pressure roller triangular plate, one side of the linear guide rail is fixedly connected to the bottom of the pressure roller box, and the other end is adjacent to the pressure roller triangular plate, and there is a gap between the pressure roller triangular plate and the linear guide rail.

[0013] The electromagnetic pressure beam assembly comprises an electromagnetic pressure beam, which comprises a pressure beam box, a plurality of electromagnetic cylinders arranged inside the pressure beam box, and the electromagnetic cylinder comprises a cylinder body, a moving iron core arranged inside the cylinder body, and a piston rod.

[0014] The pressure beam box body includes a partition, which divides the pressure beam box body into an upper box body and a lower box body. A plurality of pressure plates are arranged in the lower box body, and the pressure plates are connected to the piston rod. The lower box body includes a support plate, and a plurality of arc-shaped spring pressure plates are arranged on the support plate. One end of the spring pressure plate is fixed to the bottom of the support plate, and the other end is arranged corresponding to the pressure plate.

[0015] A coil is arranged between the moving iron core and the cylinder body, a return spring is sleeved on the piston rod, one end of the piston rod is connected to the moving iron core, and the other end is connected to the pressure plate, the spring pressure plate includes a connecting end, a buffer end and a pressure plate end, one end of the buffer end is connected to the connecting end, and the other end is connected to the pressure plate end, and the spring pressure plate is connected to the support plate through the connecting end.

[0016] The dust removal component comprises a dust blowing bracket for fixing the rotary blowing component, the dust blowing bracket is provided with a dust removal port corresponding to the rotary blowing unit, and the rotary blowing hole is provided below the air outlet pipe.

[0017] The tensioning airbag comprises an upper mounting plate, a lower mounting plate and an airbag body. One side of the upper mounting plate is connected to the second tensioning roller, and the other side is connected to the support beam.

[0018] The longitudinal sand units are provided with two, and the electromagnetic pressure beam assembly of one of the longitudinal sand units is provided with a lifting mechanism.

[0019] The lifting mechanism is arranged on the upper part of the pressure beam box body, and a connecting rod is arranged between the lifting mechanisms. The lifting mechanism includes a lifting guide sleeve, a lifting guide shaft, a lifting screw and a ball nut. A reducer is arranged at one end of the lifting screw, and the other end is connected to the lifting guide shaft. The ball nut is arranged between the lifting screw and the lifting guide shaft.

[0020] The beneficial effects of the present invention are:

[0021] 1. The fully automatic electromagnetic sanding center is formed by horizontal sanding unit + vertical sanding unit + vertical sanding unit + polishing unit. It adopts a modular design concept and can be combined according to the needs of different customers. During the sanding process, this combination can form criss-cross sanding patterns on the surface of the board, eliminating the sanding patterns that could not be eliminated when there was only vertical sanding. It can better interrupt the fibers on the surface of the wood to obtain a smoother and smoother sanded surface.

[0022] 2. Dust removal components are set at the corresponding positions of the horizontal sanding unit, vertical sanding unit and polishing unit. When in use, the conveyor bed is connected to a vacuum pump with a vacuum adsorption function, which can achieve sanding of small-sized plates. The conveyor belt is equipped with a cleaning device to ensure that the conveyor belt is kept clean, which is very important in paint sanding to prevent slipping during the sanding process due to the smooth surface of the conveyor belt; at the same time, it also ensures that the surface of the sanded plate is clean.

[0023] 3. Set up a segmented roller detection unit. When a wooden board is conveyed, the board contacts the roller, and the segmented roller assembly swings with the middle of the roller triangle as the fulcrum until it reaches balance. The upper surface of the roller triangle of the segmented roller assembly is flush with the linear guide rail at the bottom of the roller box, so that multiple groups of segmented roller assemblies are on the same horizontal plane. The detection signal is transmitted to the computer through the proximity switch corresponding to the segmented roller assembly, and then the output pressure of the electromagnetic cylinder is controlled to achieve high-precision segmented detection.

[0024] 4. Set up a computer-controlled electromagnetic pressure beam system, which can adjust the sanding pressure of each independent pressure block in the pressure beam in milliseconds, and can obtain a maximum tolerance compensation of 2 mm in the same workpiece or between workpieces with varying thickness tolerances, ensuring no sanding through. The matrix of staggered pressure blocks ensures a soft and smooth transition of the plate, avoiding sanding lines. Compared with the previous pneumatic pressure beam system, it will not be damaged by water and oil in the air path. The wide pressure beam can obtain uniform and consistent sanding force.

[0025] 5. The spring pressure piece is set under the sanding pad. The sanding pad is a manganese steel plate. When sanding, the sanding pad is in close contact with the lining belt and the sanding belt. On the one hand, it increases the resilience. On the other hand, according to the principle of following the high and the low, it prevents the occurrence of sand leakage. Flexible materials such as felt and sponge are glued between the manganese steel plate and the graphite cloth. The resilience of the material itself is used to better compensate for the uneven sanding amount caused by the deformation of the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of a segmented pressure roller detection unit;

[0028] Figure 3 yes Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0029] Figure 4 It is a schematic diagram of the structure of the press roller triangle plate;

[0030] Figure 5 It is a schematic diagram of the structure of the horizontal sand unit;

[0031] Figure 6 It is a schematic diagram of the structure of the electromagnetic pressure beam assembly;

[0032] Figure 7 yes Figure 6 Schematic diagram of the local structure;

[0033] Figure 8 It is a schematic diagram of the electromagnetic cylinder structure;

[0034] Fig. 9 It is a schematic diagram of the cross-sectional structure of the electromagnetic cylinder;

[0035] Fig.10 yes Figure 6 A schematic diagram of the enlarged structure of B;

[0036] Fig.11 yes Figure 7 Schematic diagram of the enlarged structure of C in the middle;

[0037] Fig.12 It is a schematic diagram of the structure of the first longitudinal sand unit;

[0038] Fig.13 yes Fig.12 Schematic diagram of the local structure;

[0039] Fig.14 It is a schematic diagram of the partial cross-sectional structure of the lifting mechanism.

[0040] 100, segmented pressure roller detection unit; 1, pressure roller box; 101, detection sensor; 102, linear guide; 103, support; 2, segmented pressure roller assembly; 201, pressure roller triangle plate; 202, detection pressure roller; 3, tension spring buffer assembly; 301, tension spring; 302, spring hanger; 200, cross sand unit; 4, cross sand assembly; 401, sand belt assembly; 412, sand belt tensioner; 402, lining belt assembly; 422, lining belt tensioner; 403, cross sand drive motor; 404, cross grinding wheel; 5, electromagnetic pressure beam assembly; 501, pressure beam box; 511, partition; 512, upper box; 513, support plate; 514, pressure plate; 521, cylinder; 522, moving iron core; 523, piston rod; 524, coil; 525, reset spring; 531, connection end; 532, buffer end; 533, pressure plate end; 502, electromagnetic cylinder; 503, spring pressure plate; 504, guide rod; 505, sanding pad; 551, manganese steel plate; 552, felt; 553, sponge; 554, graphite cloth; 300, first longitudinal sanding unit; 6, steel rod; 601, first tensioning roller; 602, second tensioning roller; 7, support beam; 701, guide shaft; 702, tensioning airbag; 721, upper mounting plate; 722, lower mounting plate; 723, airbag body; 9, lifting mechanism; 901, connecting rod; 902, lifting guide sleeve; 903, lifting guide shaft; 904, lifting screw; 905, ball screw nut; 906, reducer; 400, polishing unit; 500, dust removal unit; 600, second longitudinal sanding unit; 700, frame; 800, conveyor bed. DETAILED DESCRIPTION

[0041] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0042] like Figure 1-14 As shown, a fully automatic electromagnetic sanding center includes a frame 700 and a conveyor bed 800, on which a segmented roller detection unit 100, a transverse sanding unit 200, a first longitudinal sanding unit 300, a polishing unit 400 and a dust removal unit 500 are sequentially arranged;

[0043] The segmented roller detection unit 100 includes a roller box 1, a plurality of segmented roller assemblies 2, the segmented roller assembly 2 includes a roller triangle plate 201, a detection roller 202 and a detection sensor 101 disposed in the roller box 1, the detection sensor 101 passes through the roller box 1 and is disposed corresponding to the roller triangle plate 201;

[0044] A tension spring buffer assembly 3 is provided at one end of the roller triangle plate 201, and the other end is connected to the detection roller 202. The middle part of the roller triangle plate 201 is connected to the roller box 1 by providing a connecting block 203, and a linear guide rail 102 is provided between the roller triangle plate 201 and the roller box 1. The tension spring buffer assembly 3 includes a tension spring 301 and a spring hanger 302 provided on one side of the roller box 1. One end of the tension spring 301 is connected to the spring hanger 302, and the other end is connected to the roller triangle plate 201. One side of the linear guide rail 102 is fixedly connected to the bottom of the roller box 1, and the other end is adjacent to the roller triangle plate 201. There is a gap between the roller triangle plate 201 and the linear guide rail 102.

[0045] Supports 103 are provided on both sides of the pressing roller box 1 , the segmented pressing roller assembly 2 is provided between the supports 103 , and the segmented pressing roller detection unit 100 is fixed to the frame 700 via the supports 103 .

[0046] Specifically, the segmented roller detection unit 100 is installed at the front end of the sanding machine through the support 103. When a wooden board is conveyed, the wooden board contacts the detection roller 202, and the segmented roller assembly 2 swings with the middle of the roller triangle plate 201 as the fulcrum, that is, it swings with the connecting block 203 as the fulcrum until it reaches balance. The upper surface of the roller triangle plate 201 of the segmented roller assembly 2 is flush with the linear guide rail 102 at the bottom of the roller box 1, so that multiple groups of segmented roller assemblies 2 are on the same horizontal plane. The detection sensor 101 corresponding to the segmented roller assembly 2 detects the distance between the corresponding segmented roller assembly 2 and the proximity switch 6, and the detection signal of the roller is transmitted to the computer. The computer calculates to adapt to the sanding of plates of different thicknesses and prepares for subsequent sanding.

[0047] The transverse sand unit 200 includes a transverse sand frame, a transverse sand assembly 4, and an electromagnetic pressure beam assembly 5. The transverse sand assembly 4 includes a sanding belt assembly 401 and a lining belt assembly 402. The electromagnetic pressure beam assembly 5 is arranged above the lining belt assembly 402; the sanding belt assembly 401 includes a sanding belt and a sanding belt tensioner 412, and the lining belt assembly 402 includes a lining belt and a lining belt tensioner 422. A transverse sand driving motor 403 and a transverse grinding wheel 404 are arranged on the transverse sand frame. A triangle is formed between the transverse grinding wheel 404 and the lining belt tensioner 412. The transverse grinding wheel 404 and the lining belt tensioner 422 form a triangle. The lining belt is arranged on the inner side of the sanding belt.

[0048] Specifically, the horizontal sand drive motor 403 and the horizontal grinding wheel 404 are driven by a new type of poly-V belt. Compared with the previous V-belt, the poly-V belt has good shock resistance and impact resistance, and the transmission is smoother and more efficient. A lining belt is arranged inside the sand belt, and the lining belt can cut the sanding lines to obtain a better sanding effect. The lining belt can also increase the service life of the sand belt.

[0049] The electromagnetic pressure beam assembly 5 includes an electromagnetic pressure beam, which includes a pressure beam box 501, a plurality of electromagnetic cylinders 502 arranged inside the pressure beam box 501, and the electromagnetic cylinder 502 includes a cylinder 521, a moving iron core 522 and a piston rod 523 arranged inside the cylinder 521. The pressure beam box 501 includes a partition 511, which divides the pressure beam box 501 into an upper box 512 and a lower box. A plurality of pressure plates 514 are arranged in the lower box, and the pressure plates 514 are connected to the piston rod 523. The lower box includes a support plate 513, and a plurality of arc-shaped spring pressure plates 503 are arranged on the support plate 513. One end of the spring pressure plate 503 is fixed to the bottom of the support plate 513, and the other end is arranged corresponding to the pressure plate 514. A coil 524 is arranged between the moving iron core 522 and the cylinder body 521, and a return spring 525 is sleeved on the piston rod 523. One end of the piston rod 523 is connected to the moving iron core 522, and the other end is connected to the pressure plate 514. The spring compression plate 503 includes a connecting end 531, a buffer end 532 and a pressure plate end 533. One end of the buffer end 532 is connected to the connecting end 531, and the other end is connected to the pressure plate end 533. The spring compression plate 503 is connected to the support plate 513 via the connecting end.

[0050] A sanding pad 505 is arranged between the bottom plate of the pressure beam box 501 and the spring pressing plate 503, and a guide rod 504 is arranged between the bottom of the pressure beam box 501 and the sanding pad 505, and the sanding pad 505 is sleeved on the guide rod 504. Under the joint action of the spring pressing plate 503 and the electromagnetic cylinder 502, the sanding pad 505 moves up and down along the guide rod 505. The sanding pad 505 is a manganese steel plate 551, and felt 552, sponge 553 and graphite cloth 554 are sequentially adhered on the manganese steel plate 551 from top to bottom. The manganese steel plate 551 ensures strength, and the material itself has buffering performance and good resilience. In addition, the felt 552 and the sponge 553 are flexible materials themselves, which can better compensate for the inconsistent thickness of the plate caused by plate deformation. The lubrication performance of the graphite cloth 554 itself is good, which ensures that there will be no jamming during the sanding process.

[0051] The first longitudinal sanding unit 300 includes a steel rod 6, a first tensioning roller 601 and a second tensioning roller 602 arranged from bottom to top, a lining belt is wound between the steel rod 6 and the first tensioning roller 601, an abrasive belt is wound between the steel rod 6 and the second tensioning roller 602, an electromagnetic pressure beam assembly 5 is arranged between the steel rod 6 and the first tensioning roller 601, a support beam 7 is arranged below the second tensioning roller 602, and a guide shaft 701 and a plurality of tensioning airbags 702 are arranged between the support beam 7 and the second tensioning roller 602;

[0052] The tensioning airbag 702 includes an upper mounting plate 721 , a lower mounting plate 722 and an airbag body 723 . One side of the upper mounting plate 721 is connected to the second tensioning roller 602 , and the other side is connected to the support beam 7 .

[0053] There are two longitudinal sand units, namely a first longitudinal sand unit 300 and a second longitudinal sand unit 600 . The electromagnetic pressure beam assembly of the first longitudinal sand unit 300 is provided with a lifting mechanism 9 .

[0054] The lifting mechanism 9 is arranged on the upper part of the pressure beam box 501, and a connecting rod 901 is arranged between the lifting mechanism 9. The lifting mechanism 9 includes a lifting guide sleeve 902, a lifting guide shaft 903, a lifting screw 904 and a ball nut 905. A reducer 906 is arranged at one end of the lifting screw 904, and the other end is connected to the lifting guide shaft 903. The ball nut 905 is arranged between the lifting screw 904 and the lifting guide shaft 903.

[0055] The electromagnetic pressure beam assembly 5 is provided with a lifting mechanism 9, which can realize precise adjustment of the lifting and lowering, and can facilitate the user to adjust the sanding amount during use.

[0056] The dust removal unit 500 includes a cyclone assembly, which includes an air inlet pipe, a rotating sleeve and an air outlet pipe. The rotating sleeve is connected to the air inlet pipe through a bearing. The rotating sleeve, the air inlet pipe and the air outlet pipe form a ventilation channel. Cyclone holes are arranged at both ends of the air outlet pipe. The dust removal unit 500 also includes a dust blowing bracket for fixing the cyclone assembly. The dust blowing bracket is provided with a dust removal port corresponding to the cyclone assembly. The cyclone hole is arranged below the air outlet pipe.

[0057] The second longitudinal sanding unit 600 has the same structure as the first longitudinal sanding unit 300, except that it does not include a lifting mechanism. In addition, the polishing unit is a prior art, so it will not be described in detail.

[0058] Working principle:

[0059] The plate is transported from the conveyor bed 800 to the segmented roller detection unit 100. After being detected by the segmented roller detection unit 100, it enters the horizontal sanding unit 200, the first longitudinal sanding unit 300, the second longitudinal sanding unit 600 and the polishing unit 400 in sequence. The horizontal sanding unit 200, the first longitudinal sanding unit 300 and the second longitudinal sanding unit 600 are all provided with an electromagnetic pressure beam assembly 5. The different parts of the plate are detected by the segmented roller detection unit 100, and the detection signal is transmitted to the computer, and then the output pressure of the electromagnetic cylinder 502 of the electromagnetic pressure beam assembly 5 is controlled. The electromagnetic cylinder 502 is correspondingly provided with a matrix staggered pressure plate 514 to ensure a soft and smooth transition of the plate and avoid sanding lines. At the same time, the same workpiece or workpieces with varying thickness tolerances can obtain a tolerance compensation of up to 2 mm to ensure that there is no sand penetration. Compared with the previous pneumatic system, it will not be damaged due to water and oil in the air path. The electromagnetic cylinder 502 is set in a wide pressure beam box to obtain a uniform and consistent sanding force. The transverse sanding unit 200, the first longitudinal sanding unit 300 and the second longitudinal sanding unit 600 are all provided with lining belts, which can cut the sanding lines to obtain better sanding effects and increase the service life of the sanding belts. The electromagnetic pressure beam assembly 5 is provided to effectively avoid the plate sanding phenomenon caused by plate deformation.

[0060] Specifically, the electromagnetic pressure beam assembly 5 receives a signal, and the electromagnetic cylinder 502 of the electromagnetic pressure beam assembly 5 is energized. According to the electromagnetic principle, piston rods 523 of different lengths are extended, and corresponding pressures are output accordingly to push down the pressure plate 514, thereby further compressing the lining belt. The sanding belt is pressed against the surface of the workpiece through the lining belt to perform sanding on the surface of the workpiece. While sanding, the dust removal unit 500 works, and high-pressure gas is blown into the air inlet pipe through an external air pump. Rotary blowing holes are provided on both sides of the air inlet pipe. The air outlet pipe rotates with the rotating sleeve as the axis through the action of the airflow to realize rotary blowing. At the same time, sanding debris enters the dust removal cover from the dust removal port to ensure the cleanliness of the sanding belt surface.

[0061] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A fully automatic electromagnetic sanding center, comprising a frame and a conveyor bed, characterized in that: The frame is provided with a segmented roller detection unit, a transverse sanding unit, a longitudinal sanding unit, a polishing unit and a dust removal unit in sequence; The segmented roller detection unit includes a roller box, a plurality of segmented roller assemblies, the segmented roller assembly includes a roller triangle plate, a detection roller, and a detection sensor arranged in the roller box, the detection sensor passes through the roller box and is arranged corresponding to the roller triangle plate; The transverse sand unit includes a transverse sand assembly, an electromagnetic pressure beam assembly and a dust removal assembly, wherein the dust removal assembly is arranged on one side of the transverse sand assembly, the transverse sand assembly includes a sand belt assembly and a lining belt assembly, and the electromagnetic pressure beam assembly is arranged above the lining belt assembly; The longitudinal sanding unit comprises a steel roller, a first tensioning roller and a second tensioning roller arranged from bottom to top, a lining belt is wound between the steel roller and the first tensioning roller, an abrasive belt is wound between the steel roller and the second tensioning roller, an electromagnetic pressure beam assembly is arranged between the steel roller and the first tensioning roller, a support beam is arranged below the second tensioning roller, and a guide shaft and a plurality of tensioning airbags are arranged between the support beam and the second tensioning roller; The dust removal unit includes a cyclone blowing assembly, which includes an air inlet pipe, a rotating sleeve and an air outlet pipe. The rotating sleeve is connected to the air inlet pipe through a bearing. The rotating sleeve, the air inlet pipe and the air outlet pipe form a ventilation channel. Cyclone blowing holes are arranged at both ends of the air outlet pipe. A tension spring buffer assembly is arranged at one end of the pressure roller triangular plate, and the other end is connected to the detection pressure roller. The middle part of the pressure roller triangular plate is connected to the pressure roller box by arranging a connecting block, and a linear guide rail is arranged between the pressure roller triangular plate and the pressure roller box. The tension spring buffer assembly includes a tension spring and a spring hanger arranged on one side of the pressure roller box, one end of the tension spring is connected to the spring hanger, and the other end is connected to the pressure roller triangular plate, one side of the linear guide rail is fixedly connected to the bottom of the pressure roller box, and the other end is adjacent to the pressure roller triangular plate, and there is a gap between the pressure roller triangular plate and the linear guide rail.

2. A fully automatic electromagnetic sanding center as claimed in claim 1, characterized in that: The electromagnetic pressure beam assembly comprises an electromagnetic pressure beam, which comprises a pressure beam box, a plurality of electromagnetic cylinders arranged inside the pressure beam box, and the electromagnetic cylinder comprises a cylinder body, a moving iron core arranged inside the cylinder body, and a piston rod.

3. A fully automatic electromagnetic sanding center as claimed in claim 2, characterized in that: The pressure beam box body includes a partition, which divides the pressure beam box body into an upper box body and a lower box body. A plurality of pressure plates are arranged in the lower box body, and the pressure plates are connected to the piston rod. The lower box body includes a support plate, and a plurality of arc-shaped spring pressure plates are arranged on the support plate. One end of the spring pressure plate is fixed to the bottom of the support plate, and the other end is arranged corresponding to the pressure plate.

4. A fully automatic electromagnetic sanding center as claimed in claim 3, characterized in that: A coil is arranged between the moving iron core and the cylinder body, a return spring is sleeved on the piston rod, one end of the piston rod is connected to the moving iron core, and the other end is connected to the pressure plate, the spring pressure plate includes a connecting end, a buffer end and a pressure plate end, one end of the buffer end is connected to the connecting end, and the other end is connected to the pressure plate end, and the spring pressure plate is connected to the L-shaped side wall through the connecting end.

5. A fully automatic electromagnetic sanding center as claimed in claim 1, characterized in that: The dust removal component comprises a dust blowing bracket for fixing the rotary blowing component, a dust removal port is arranged on the dust blowing bracket corresponding to the rotary blowing component, and the rotary blowing hole is arranged below the air outlet pipe.

6. A fully automatic electromagnetic sanding center as claimed in claim 1, characterized in that: The tensioning airbag comprises an upper mounting plate, a lower mounting plate and an airbag body. One side of the upper mounting plate is connected to the second tensioning roller, and the other side is connected to the support beam.

7. A fully automatic electromagnetic sanding center as claimed in claim 1, characterized in that: The longitudinal sand units are provided with two, and the electromagnetic pressure beam assembly of one of the longitudinal sand units is provided with a lifting mechanism.

8. A fully automatic electromagnetic sanding center as claimed in claim 7, characterized in that: The lifting mechanism is arranged on the upper part of the pressure beam box body, and a connecting rod is arranged between the lifting mechanisms. The lifting mechanism includes a lifting guide sleeve, a lifting guide shaft, a lifting screw and a ball nut. A reducer is arranged at one end of the lifting screw, and the other end is connected to the lifting guide shaft. The ball nut is arranged between the lifting screw and the lifting guide shaft.

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