A laser cutting device and method for sheet metal processing

Abstract

This invention belongs to the field of laser cutting technology and relates to a laser cutting device and method for sheet metal processing. The device includes a pair of retainers mounted on a mounting rod, which can move closer together to fix the sheet metal to be cut. Each retainer includes a mounting shell and multiple clamping plates arranged sequentially from bottom to top and movably disposed inside the mounting shell. The clamping plates on both sides of the sheet metal provide horizontal clamping force, while the clamping plate above the sheet metal provides downward pressure. The clamping plates on both sides of the sheet metal do not require a large preload to fix it, thus avoiding bending deformation of thin sheet metal due to increased cutout area caused by part separation and the influence of the preload of the horizontal clamps. Furthermore, the clamping plates with smaller clamping force can also help release the stress caused by slight thermal expansion of the sheet metal due to the high temperature generated during cutting.

Description

Technical Field

[0001] This invention relates to the field of laser cutting, and in particular to a laser cutting device and method for sheet metal processing. Background Technology

[0002] Laser cutting is a device that uses a high-energy-density light beam to cut workpieces. It has many advantages such as high precision, fast cutting speed, small heat-affected zone, and easy automation, and is therefore widely used in many industrial fields.

[0003] Sheet metal is a common processing object for laser cutting equipment. When processing sheet metal with laser cutting equipment, the sheet metal needs to be fixed on the laser cutting bed first to prevent it from moving during the cutting process and affecting the cutting accuracy. Then, a high-energy-density laser beam is used to cut the parts from the sheet metal. To ensure cutting accuracy, a certain preload is applied to the sheet metal during the fixing process to ensure reliable fixation. However, when processing thin and soft sheet metal (such as solid wood and cork; solid wood is used to process handicrafts, models, etc., where the hollow area is large after the workpiece falls; cork is used to process coasters, handicrafts, etc., where the hollow area is large after the workpiece falls), the laser beam cuts the parts from the sheet metal, and the parts separate from the sheet metal under the action of gravity. The hollow area of ​​the sheet metal increases, making the sheet metal more prone to bending and deformation under the preload applied by the fixture, thus affecting the accuracy of subsequent cutting. Summary of the Invention

[0004] Therefore, the purpose of this invention is to solve the problem that sheet metal is prone to bending and deformation during laser cutting due to the increase in the cut area and the pre-tightening force of the clamp. This invention provides a laser cutting device for sheet metal processing, in which a clamping plate with its side wall facing the sheet metal abuts against the side wall of the sheet metal, and a clamping plate located above the sheet metal tilts and presses the sheet metal in place. The sheet metal can be fixed without a large pre-tightening force, thereby avoiding the above-mentioned situation.

[0005] In a first aspect, to solve the above-mentioned technical problems, the present invention provides a laser cutting device for sheet metal processing, including a laser cutting bed, a mounting rod provided on the laser cutting bed, and a pair of supports, the pair of supports being disposed on the mounting rod, and the pair of supports being movable to move closer together to fix the sheet metal to be cut; each of the supports includes: Mounting housing; Multiple clamping plates are arranged sequentially from bottom to top and are movably disposed inside the mounting shell; The clamping plate is movably configured to have a first state and a second state: In the first state: the clamping plate remains horizontal, and its sidewall abuts against the sidewall of the plate; In the second state: the clamping plate moves to an inclined state, and its side edge presses against the top of the plate; When the two backing plates move closer to the board: any clamping plate with a sidewall area facing the sidewall of the board maintains the first state; the remaining clamping plates located above the board are arranged at an angle in sequence, each pressing against the top of the board in the second state.

[0006] Preferably, the mounting shell has a plurality of first guide grooves inside, and the plurality of first guide grooves are arranged one-to-one with the clamping plate; the first guide groove is used to guide the movement of the clamping plate, and includes a horizontal part and an inclined part that are connected to each other.

[0007] Preferably, the clamping plate switches to a first state when it moves along the horizontal portion, and switches to a second state when it moves along the inclined portion.

[0008] Preferably, the mounting shell is further provided with a plurality of second guide grooves, and the plurality of second guide grooves are provided in a one-to-one correspondence with the plurality of clamping plates; the ends of the clamping plates move along the inclined portion, and the middle portion of the clamping plates moves along the second guide grooves, so that the side edges of the clamping plates press against the top of the plate.

[0009] Preferably, the mounting housing is further provided with multiple levels of push blocks, each level of push block corresponding to one of the clamping plates; each level of push block is used to push the corresponding clamping plate to move along the inclined portion.

[0010] Preferably, the multiple push blocks are distributed in series along the vertical direction and move sequentially from top to bottom.

[0011] Preferably, each of the push blocks is provided with a transmission rod, and the transmission rod located on the upper push block extends into the adjacent lower push block; when any of the clamping plates moves along the horizontal part, the clamping plate decouples the corresponding push block from the transmission rod of the upper push block.

[0012] Preferably, the mounting housing is further provided with a push rod, which spans between the clamping plate and the corresponding push block; the end of the push rod is embedded in the corresponding push block to support the stop block, and the stop block is slidably installed in the push block and is used to couple with the upper-level push rod.

[0013] Preferably, the mounting housing is further provided with a drive rod and a clamping block. The drive rod is used to drive the clamping block to move and fix the backing to the mounting rod. When the drive rod rotates, it can drive the uppermost push block to move in a direction perpendicular to the mounting housing.

[0014] Secondly, to solve the above problems, the present invention also provides a method for laser cutting sheet metal, which is based on the laser cutting equipment for sheet metal processing described above, and includes the following steps: S1. The sheet material to be cut is placed at the cutting station of the laser cutting machine; S2. Drive the backrest towards the side wall of the board, and keep the clamping plate in the side wall area horizontal, pressing against the board from the side. S3. The uppermost clamping plate moves to an inclined position first, extending to the outside of the mounting shell, with its side edges approaching the plate. S4. The remaining clamps located above the plate move from top to bottom to an inclined state, extending to the outside of the mounting shell, embedding between the upper clamp and the plate, bearing the downward pressure of the upper clamp, and transmitting it to the top of the plate. S5. Until the upper clamping plate adjacent to the clamping plate that abuts against the side wall of the plate is embedded between the inclined clamping plate and the plate, the clamping plate bears the downward pressure of the upper clamping plates and transmits the downward pressure to the top of the plate, pressing against the plate from the top.

[0015] Compared with the prior art, the above-described technical solution of the present invention has the following advantages: The laser cutting equipment and method for sheet metal processing described in this invention involves a clamping plate with its sidewalls facing the sheet metal, which abuts against the sidewalls of the sheet metal. A certain pre-tightening force is applied to the sheet metal through the clamping plate. Multiple clamping plates located above the sheet metal move to an inclined state. The multiple inclined clamping plates are arranged and abut against each other in sequence. The side edge of the lowest clamping plate in the inclined state abuts against the top of the sheet metal, transmitting the pressure of the upper clamping plate to the top of the sheet metal, thereby pressing the sheet metal down. The clamping plate above the sheet metal cooperates with the clamping plate that abuts against the sidewalls of the sheet metal to fix the sheet metal. The clamping plates located on both sides of the sheet metal do not need to provide a large pre-tightening force to fix the sheet metal, thereby avoiding bending deformation of thin sheet metal due to the increase of the hollow area caused by the separation of parts and the influence of the pre-tightening force of the horizontal clamp. In addition, the clamping plate with a smaller clamping force can also help the sheet metal release the stress caused by the slight thermal expansion due to the high temperature generated by cutting. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the force exerted on the plate when it is fixed, according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the laser cutting equipment provided in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a laser cutting bed with a concealed cover plate provided in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the laser cutting bed provided in a preferred embodiment of the present invention; Figure 5This is a schematic diagram of the transverse cross-sectional structure of the mountain-supporting end provided in a preferred embodiment of the present invention; Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 This is a schematic cross-sectional view of the end of the mounting shell provided in a preferred embodiment of the present invention; Figure 8 This is a schematic diagram of the connection structure between the push rod and the push block provided in a preferred embodiment of the present invention; Figure 9 yes Figure 8 Enlarged view at point B in the middle; Figure 10 This is a schematic diagram of the structure of the mountain-supporting end of the first guide groove according to a preferred embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the push block and the first tenon rod in a preferred embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the slider and the first guide groove in a preferred embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the clamping plate and the first guide groove provided in a preferred embodiment of the present invention; Figure 14 This is a schematic diagram of the internal structure of the pusher block provided in a preferred embodiment of the present invention.

[0018] Explanation of reference numerals in the accompanying drawings: 1. Laser cutting bed; 11. Mounting shell; 111. Clamping plate; 112. First tenon; 113. Second tenon; 114. Partition; 115. Clamping block; 116. Drive rod; 117. Gear; 118. Support platform; 119. Slider; 12. Mounting rod; 13. Support bar; 14. Push block; 141. Push rod; 142. Transmission rod; 143. Stop block; 144. First guide groove; 145. Second guide groove; 146. Horizontal part; 147. Inclined part; 148. Tooth block; 149. Movable sleeve; 15. Refractory brick; 16. Cover plate. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0020] Example 1: Refer to Figure 1-4 As shown, this embodiment of the invention discloses a laser cutting device for sheet metal processing, including a laser cutting bed 1, a mounting rod 12 on the laser cutting bed 1, and a pair of supports, which are mounted on the mounting rod 12 and can move together to fix the sheet metal to be cut; each support includes: Mounting housing 11; Multiple clamping plates 111 are arranged sequentially from bottom to top and are movably disposed inside the mounting shell 11; The clamping plate 111 is movably configured to have a first state and a second state: In the first state: the plywood 111 remains horizontal, and its sidewall abuts against the sidewall of the board; In the second state: the clamping plate 111 moves to an inclined state, and its side edge presses against the top of the plate; When the two support plates move closer to the board: any clamping plate 111 with a sidewall area directly facing the sidewall of the board maintains the first state; the remaining clamping plates 111 located above the board are arranged at an angle, each pressing against the top of the board in the second state (e.g., Figure 10 and Figure 13 (As shown).

[0021] Specifically, the laser cutting bed 1 is provided with multiple mounting rods 12, and multiple serrated support bars 13 are provided on the mounting rods 12. Clamping blocks 115 are symmetrically slidably provided on the mounting shell 11. The mounting shell 11 is provided with a support platform 118 whose top surface is flush with the top surface of the support bars 13. A spring is provided between the clamping plate 111 and the mounting shell 11.

[0022] Furthermore, during the clamping process, the plate to be cut is placed on the laser cutting bed 1. The operator moves the two support plates, causing them to move closer to the plate within the gaps of the support bars 13. The sidewalls of the plate push against the clamping plates 111, whose sidewalls are directly opposite each other, and move them into the mounting housing 11. The spring between the clamping plates 111 and the mounting housing 11 is compressed, and the spring applies a certain pressure to the sidewalls of the plate through the clamping plates 111 (equivalent to the preload force for clamping the plate). The clamping plates 111 on the two support plates, whose sidewalls are directly opposite the sidewalls of the plate, cooperate to clamp the opposite sidewalls of the plate, clamping the plate horizontally. Then, the two clamping blocks 115 on the mounting housing 11 are driven to move closer to the mounting rod 12. The two clamping blocks 115 cooperate to fix the mounting housing 11 to the mounting rod 12. The two support plates clamp the plate, located in... Multiple clamping plates 111 on the upper part of the plate move to an inclined state. The multiple inclined clamping plates 111 are arranged and abut against each other in sequence. The side edge of the lowest clamping plate 111 in the inclined state abuts against the top of the plate, transmitting the concentrated pressure of the upper clamping plate 111 to the top of the plate. The inclined clamping plates 111 cooperate with the support platform 118 on the mounting shell 11 to clamp the plate. The clamping plates 111 on the upper part of the plate cooperate with the clamping plates 111 that abut against the side wall of the plate to fix the plate. The clamping plates 111 on both sides of the plate do not need to provide a large pre-tightening force to fix the plate, thereby avoiding the bending deformation of the thin plate due to the increase of the hollow area caused by the separation of parts and the influence of the pre-tightening force of the horizontal clamp. In addition, the clamping plates 111 with smaller clamping force can also help the plate release the stress caused by the slight thermal expansion due to the high temperature generated by cutting.

[0023] Furthermore, in the above embodiment, the width of the multiple clamping plates 111 can decrease sequentially from top to bottom. During clamping, the sidewall of the plate pushes against the clamping plate 111, which has a portion of its sidewall facing it, and moves into the mounting shell 11. The spring between the clamping plate 111 and the mounting shell 11 is compressed, and the spring applies a certain pressure to the sidewall of the plate through the clamping plate 111. The multiple clamping plates 111 located above the plate move to an inclined state, and the inclination angles of the multiple clamping plates 111 are approximately the same. The side edges of the multiple clamping plates 111 are all in contact with the top of the plate, distributing the downward pressure applied to the plate by the multiple clamping plates 111 to multiple contact points. This can protect the surface of the plate when processing plates with relatively soft surface textures, and prevent the surface of the plate from being damaged by the downward pressure provided by the upper clamping plate 111.

[0024] Furthermore, in the above embodiment, the mounting shell 11 is provided with a plurality of horizontally arranged partitions 114. The partitions 114 are located between adjacent clamping plates 111. During the clamping operation, the clamping plate 111 facing the side wall of the plate moves into the mounting shell 11 and is embedded between the partitions 114. The partitions 114 keep the clamping plate 111 in a horizontal state so that the side wall of the clamping plate 111 is in horizontal contact with the side wall of the plate, ensuring that the clamping force on both sides of the plate is in the horizontal direction.

[0025] As another embodiment provided by the present invention, such as Figure 10-13 As shown, the mounting housing 11 has multiple first guide grooves 144 inside, and the multiple first guide grooves 144 are arranged one-to-one with the clamping plate 111. The first guide groove 144 is used to guide the movement of the clamping plate 111, and includes a horizontal part 146 and an inclined part 147 that are connected. When the clamping plate 111 moves along the horizontal part 146, it switches to the first state, and when the clamping plate 111 moves along the inclined part 147, it switches to the second state.

[0026] Specifically, the clamping plate 111 has coaxially distributed first tenon rods 112 on the side walls on both sides. The first tenon rods 112 are adapted to the first guide groove 144. The horizontal part 146 of the first guide groove 144 is provided with a slider 119. A spring is provided between the slider 119 and the mounting shell 11.

[0027] Furthermore, before clamping, the first tenon 112 of the clamping plate 111 is located at the connection between the horizontal part 146 and the inclined part 147 of the first guide groove 144, and the first tenon 112 is in contact with the side wall of the slider 119.

[0028] During clamping, the sidewall of the plate pushes against the clamping plate 111, which is directly opposite the sidewall, and moves into the mounting shell 11. The first tenon 112 on the clamping plate 111 moves along the horizontal part 146 of the first guide groove 144, pushing the slider 119 to compress the spring between the slider 119 and the mounting shell 11. The spring applies a certain pressure to the sidewall of the plate through the slider 119 and the clamping plate 111. The clamping plate 111 located above the plate is driven, and the first tenon 112 on it moves obliquely upward along the inclined part 147 of the first guide groove 144 (towards the upper part of the middle of the plate), so that the clamping plate 111 gradually becomes inclined, and then the side edge at its end contacts the top of the plate, providing downward pressure to the plate and fixing it. Multiple clamping plates 111 cooperate to fix the plate from the side and top surfaces respectively, ensuring the stability of the plate during processing.

[0029] As another embodiment provided by the present invention, such as Figure 12 As shown, the interior of the mounting shell 11 is also provided with a plurality of second guide grooves 145, and the plurality of second guide grooves 145 are arranged in a one-to-one correspondence with a plurality of clamping plates 111; the ends of the clamping plates 111 move along the inclined portion 147, and the middle portion of the clamping plates 111 moves along the second guide grooves 145, so that the side edges of the clamping plates 111 press against the top of the plate.

[0030] Specifically, coaxially distributed second tenons 113 are provided on the side walls of opposite sides of the clamping plate 111, and the second tenons 113 are adapted to the second guide groove 145.

[0031] Furthermore, during the clamping operation, the side wall of the plate pushes against the clamping plate 111, which has a portion of its side wall directly opposite it, and moves it into the mounting shell 11. The first tenon 112 on the clamping plate 111 moves along the horizontal portion 146 of the first guide groove 144, and the second tenon 113 moves along the horizontal second guide groove 145. The clamping plate 111, located above the plate, is driven to move under the constraint of the first guide groove 144 and the second guide groove 145. The first tenon 112 moves obliquely upward along the inclined portion 147 of the first guide groove 144, and the second tenon 113 moves along the horizontal second guide groove 145, so that the clamping plate 111 rotates around the second tenon 113 as an axis. The side edge of the clamping plate 111 at the outer end of the mounting shell 11 approaches the top of the plate. The inclined clamping plate 111, in conjunction with the support platform 118, clamps the plate and further fixes it.

[0032] As another embodiment provided by the present invention, such as Figure 10-11 As shown, multiple push blocks 14 are also movably arranged inside the mounting housing 11, each push block 14 corresponding to a clamping plate 111; each push block 14 is used to push the corresponding clamping plate 111 to move along the inclined portion 147.

[0033] Specifically, each push block 14 is directly opposite the first tenon 112 of the corresponding clamping plate 111.

[0034] Furthermore, during the clamping operation, the side wall of the plate pushes the clamping plate 111, which is directly opposite the side wall, into the mounting shell 11. The push block 14 corresponding to the clamping plate 111 above the plate moves outward from the mounting shell 11. The push block 14 pushes the first tenon 112 to move obliquely upward along the inclined part 147 of the first guide groove 144. The corresponding clamping plate 111 gradually becomes inclined, and the second tenon 113 on it moves along the second guide groove 145. The clamping plate 111 rotates around the second tenon 113 as the axis and becomes inclined. The lower side edge located on the outside of the mounting shell 11 moves closer to the top of the plate, thereby cooperating with the support platform 118 on the mounting shell 11 to clamp the plate, and then cooperating with the clamping plate 111 that fixes the side wall of the plate to further fix the plate.

[0035] As another embodiment provided by the present invention, such as Figure 10-11 As shown, the multi-stage push blocks 14 are connected in series in the vertical direction and move step by step from top to bottom. Each push block 14 is provided with a transmission rod 142. The transmission rod 142 located on the upper push block 14 extends into the adjacent lower push block 14. When any clamping plate 111 moves along the horizontal part 146, the clamping plate 111 decouples the corresponding push block 14 from the transmission rod 142 of the upper push block 14.

[0036] Specifically, multiple push blocks 14 are connected in series in terms of power, and the upper push block 14 drives the lower push block 14 to move. The side wall of the push block 14 close to the first tenon 112 is covered with an elastic rubber layer to buffer the contact between the push block 14 and the first tenon 112, and to allow the clamping plate 111 and the first tenon 112 to have a certain amount of room to move.

[0037] Furthermore, during the clamping operation, the sidewall of the plate pushes a portion of the clamping plate 111, which is directly opposite the sidewall, into the mounting housing 11. This portion of the clamping plate 111 causes the corresponding push block 14 to decouple from the upper push block 14 and is pushed by the first tenon 112 to move inward into the mounting housing 11. Then, the uppermost push block 14 moves outward into the mounting housing 11 and pushes the first tenon 112 of the corresponding clamping plate 111 along the inclined portion 147 of the first guide groove 144. The clamping plate 111 first becomes inclined, and its side edge at the end located on the outside of the mounting housing 11 approaches the top of the plate. The upper push block 14 is driven by the transmission rod. 142 moves with the lower push block 14, which pushes the corresponding clamping plate 111 to move outward of the mounting shell 11 and inserts between the upper clamping plate 111 and the top of the plate. During the movement, it will contact the upper clamping plate 111 and push the tilt angle of the upper clamping plate 111 to decrease. The pressure of the upper clamping plate 111 is transmitted to the lower clamping plate 111 and then acts on the top of the plate through the lower clamping plate 111. Multiple clamping plates 111 located above the plate are stacked layer by layer. The downward pressure is transmitted to the top of the plate through the inclined clamping plate 111 adjacent to the horizontal state, and the plate is clamped in conjunction with the support platform 118 on the mounting shell 11.

[0038] As another embodiment provided by the present invention, such as Figure 7-9 As shown in Figure 14, a push rod 141 is also provided inside the mounting housing 11. The push rod 141 spans between the clamping plate 111 and the corresponding push block 14. The end of the push rod 141 is embedded in the corresponding push block 14 to support the stop block 143. The stop block 143 is slidably installed in the push block 14 and is used to couple with the upper push rod 141.

[0039] Specifically, the push block 14 has a waist-shaped notch adapted to the transmission rod 142. The transmission rod 142 on the upper push block 14 extends into the waist-shaped notch of the adjacent lower push block 14. The push rod 141 is slidably mounted on the mounting shell 11. One end of the push rod 141 is directly opposite the corresponding clamping plate 111, and the other end extends into the interior of the corresponding push block 14, with a ramp at the end. A return spring is provided between the push rod 141 and the mounting shell 11. The bottom end of the stop block 143 has a ramp adapted to the ramp at the end of the transmission rod 142. The top of the stop block 143 has ramps and grooves that fit with the transmission rod 142 on the side walls on both sides. A return spring is provided between the push block 14 and the mounting shell 11. A movable sleeve 149 is slidably mounted inside the push block 14, sleeved on the outside of the stop block 143. A spring is provided between the movable sleeve 149 and the push block 14.

[0040] Furthermore, during the clamping operation, the sidewall of the plate pushes a portion of the clamping plate 111, which is directly opposite the sidewall, into the mounting housing 11. This clamping plate 111 pushes the corresponding push rod 141, causing the push rod 141 to move outwards towards the corresponding push block 14. The stop block 143 moves downwards along the slope of the push rod 141, retracting into the push block 14 and disengaging from the transmission rod 142, thus decoupling the push block 14 from the upper-level push block 14. The push blocks 14 corresponding to the clamping plates 111 above the plate are all coupled to the upper-level push blocks 14. The uppermost push block 14 moves and pushes the corresponding push rod 14. As the clamping plate 111 moves along the inclined portion 147, the transmission rod 142 on the upper push block 14 couples with the stop block 143 on the lower push block 14. The groove on the stop block 143 engages with the transmission rod 142 to prevent the stop block 143 from falling into the interior of the push block 14 after separating from the push rod 141. The transmission rod 142 compresses the spring between the movable sleeve 149 and the push block 14 through the stop block 143 and the movable sleeve 149. The push block 14 is pushed by the spring to move outward of the mounting housing 11, which in turn pushes the first tenon 112 on the corresponding clamping plate 111 to move along the inclined portion 147.

[0041] As another embodiment provided by the present invention, such as Figure 6 , 11 As shown, a drive rod 116 and a clamping block 115 are also movably disposed on the mounting shell 11. The drive rod 116 is used to drive the clamping block 115 to move and fix the backing to the mounting rod 12. When the drive rod 116 rotates, it can drive the uppermost push block 14 to move in the direction perpendicular to the mounting shell 11.

[0042] Specifically, the end of the drive rod 116 extends to the outside of the mounting housing 11 and is provided with a knob. The clamping block 115 is provided with a protrusion extending into the interior of the mounting housing 11. The bottom of the mounting housing 11 is provided with a sliding groove for the protrusion to slide. The protrusion is provided with a threaded hole that matches the drive rod 116. The two ends of the drive rod 116 are respectively provided with threads. The drive rod 116 is provided with a gear 117. The uppermost push block 14 is provided with a toothed block 148 that meshes with the gear 117.

[0043] Furthermore, during the clamping operation, the plate to be cut is placed on the laser cutting bed 1. The operator moves the two supports so that they move closer to the plate within the gap of the support bar 13. The side wall of the plate pushes against the clamping plate 111, which has a part of its side wall facing it, and moves into the mounting shell 11. The spring between the clamping plate 111 and the mounting shell 11 is compressed. The spring applies a certain pressure to the side wall of the plate through the clamping plate 111, clamping the plate horizontally. During the movement, the clamping plate 111 pushes the corresponding push rod 141. The other end of the push rod 141 separates from the stop block 143 in the corresponding push block 14. Under the action of gravity, the stop block 143 retracts into the push block 14, and then separates from the transmission rod 142 of the adjacent upper push block 14.

[0044] Next, rotating the knob drives the drive rod 116 to rotate. The thread on the drive rod 116 pushes the clamping block 115 towards the mounting rod 12, thereby fixing the backing onto the laser cutting bed 1. At the same time, the gear 117 on the drive rod 116 pushes the toothed block 148 on the uppermost push block 14 to move. The uppermost push block 14 moves in a direction perpendicular to the mounting shell 11. This push block 14 pushes the first tenon 112 of the uppermost clamping plate 111 to move along the inclined portion 147 of the first guide groove 144, and the second tenon 113 to move along the second guide groove 145. The uppermost clamping plate 111 gradually becomes inclined, and its side edge located on the outside of the mounting shell 11 moves closer to the top of the plate. The upper push block 14, through its transmission... Rod 142 drives the adjacent lower push block 14 to move. The lower push block 14 pushes the first tenon rod 112 on the corresponding clamping plate 111 to move along the inclined part 147 of the corresponding first guide groove 144, gradually becoming inclined. The clamping plate 111 is embedded between the upper clamping plate 111 and the top of the plate, thereby bearing the downward force applied by the upper clamping plate 111 and continuing to transmit the downward pressure downward until the upper clamping plate 111 adjacent to the clamping plate 111 that abuts against the side wall of the plate is embedded between the inclined clamping plate 111 and the plate. The clamping plate 111 bears the downward pressure of the multiple upper clamping plates 111 and transmits the downward pressure to the top of the plate. It cooperates with the support platform 118 on the mounting shell 11 to clamp and fix the plate in the vertical direction.

[0045] Multiple clamping plates 111 are used to fix the plate from the left and right sides and the top and bottom sides of the plate. Only a small pre-tightening force is needed to fix the plate, which avoids bending and deformation of the plate due to the increase of the hollow area during the cutting process and the combined effect of the clamping pre-tightening force, thereby ensuring the processing accuracy of laser cutting.

[0046] After processing, the knob is rotated in the opposite direction. The thread on the drive rod 116 drives the clamping block 115 to move away from the mounting rod 12. The gear 117 on the drive rod 116 drives the gear block 148 and the uppermost push block 14 to move towards the inside of the mounting shell 11. The clamping plate 111 corresponding to the push block 14 is released. Then, the lower push block 14 is reset under the action of the return spring. All the tilted clamping plates 111 are released. At this time, the backrest can be pushed away from the plate to remove the cut plate from the laser cutting machine 1. The lower clamping plate 111 is also reset under the action of the spring, corresponding to the push rod 14. 1. Reset and insert into the corresponding push block 14. The ramp at the end of the push rod 141 pushes the stop block 143 upward. During the reset process, the transmission rod 142 on the upper push block 14 moves along the ramp at the end of the stop block 143, pushing the stop block 143 downward. After the transmission rod 142 passes the stop block 143, the stop block 143 moves upward under the push of the push rod 141, so that the lower push block 14 and the upper push block 14 are recoupled. After the upper clamping plate 111 loses its rear support, it moves obliquely downward along the inclined part 147 under the action of gravity, gradually returning to a horizontal state, ready for the next clamping operation.

[0047] As another embodiment provided by the present invention, such as Figure 2-3 As shown, a slope made of refractory bricks 15 is provided below the laser cutting bed 1, and the surface of the slope is covered with a cover plate 16, which is made of aluminum alloy.

[0048] Specifically, when processing metal sheets, the sheet is clamped and fixed by a backrest, and then laser cutting is performed on the metal sheet. The cut workpiece separates from the metal sheet and falls onto the ramp, sliding along the ramp to the outside of the laser cutting bed 1. At the same time, a very small amount of high-temperature waste generated during the cutting process is collected by the cover plate 16, and the refractory bricks 15 provide heat insulation to prevent the high-temperature waste from affecting the bed of the laser cutting bed 1. The cover plate 16 can be replaced after a period of use.

[0049] Example 2: A method for laser cutting sheet metal, based on the laser cutting equipment for sheet metal processing in Example 1, includes the following steps: S1. The plate to be cut is placed at the cutting station of the laser cutting machine 1. The plate to be cut is placed on the machine and the operator moves the two supports so that the supports move closer to the plate in the gap of the support bar 13. S2. The side wall of the plate pushes the clamping plate 111, which is directly opposite to the side wall, into the mounting shell 11. The spring between the clamping plate 111 and the mounting shell 11 is compressed. The spring applies a certain pressure to the side wall of the plate through the clamping plate 111, clamping the plate in the horizontal direction. During the movement, the clamping plate 111 pushes the corresponding push rod 141. The other end of the push rod 141 separates from the stop block 143 in the corresponding push block 14. Under the action of gravity, the stop block 143 retracts into the push block 14 and then separates from the transmission rod 142 of the adjacent upper push block 14. S3. Rotating the knob drives the drive rod 116 to rotate. The thread on the drive rod 116 pushes the clamping block 115 to move closer to the mounting rod 12, thereby fixing the backing onto the laser cutting bed 1. At the same time, the gear 117 on the drive rod 116 pushes the toothed block 148 on the uppermost push block 14 to move. The uppermost push block 14 moves in a direction perpendicular to the mounting shell 11. The push block 14 pushes the first tenon 112 of the uppermost clamping plate 111 to move along the inclined part 147 of the first guide groove 144 and the second tenon 113 to move along the second guide groove 145. The uppermost clamping plate 111 gradually becomes inclined, and its side edge located on the outside of the mounting shell 11 moves closer to the top of the plate. S4. The upper push block 14 drives the adjacent lower push block 14 to move through the transmission rod 142 on it. The lower push block 14 pushes the first tenon 112 on the corresponding clamping plate 111 to move along the inclined part 147 of the corresponding first guide groove 144, gradually becoming inclined. The clamping plate 111 is embedded between the upper clamping plate 111 and the top of the plate, thereby bearing the downward force applied by the upper clamping plate 111 and continuing to transmit the downward pressure downward. S5. Until the upper clamping plate 111 adjacent to the clamping plate 111 that abuts against the side wall of the plate is inserted between the inclined clamping plate 111 and the plate, the clamping plate 111 bears the downward pressure of the upper clamping plates 111 and transmits the downward pressure to the top of the plate, and cooperates with the support plate 118 on the mounting shell 11 to clamp and fix the plate in the vertical direction.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A laser cutting device for sheet metal processing, comprising a laser cutting bed, wherein a mounting rod is provided on the laser cutting bed, characterized in that, It also includes a pair of retainers, which are disposed on the mounting rod and are movable to be brought together to secure the sheet metal to be cut; each retainer includes: Mounting housing; Multiple clamping plates are arranged sequentially from bottom to top and are movably disposed inside the mounting shell; The clamping plate is movably configured to have a first state and a second state: In the first state: the clamping plate remains horizontal, and its sidewall abuts against the sidewall of the plate; In the second state: the clamping plate moves to an inclined state, and its side edge presses against the top of the plate; When the two backing plates move closer to the board: any clamping plate with a sidewall area facing the sidewall of the board maintains the first state; the remaining clamping plates located above the board are arranged at an angle in sequence, each pressing against the top of the board in the second state.

2. The laser cutting equipment for sheet metal processing according to claim 1, characterized in that: The mounting housing has multiple first guide grooves inside, and each of the multiple first guide grooves corresponds to one of the clamping plates; the first guide groove is used to guide the movement of the clamping plate, and includes a horizontal part and an inclined part that are connected to each other.

3. The laser cutting equipment for sheet metal processing according to claim 2, characterized in that: When the clamp moves along the horizontal portion, it switches to the first state; when the clamp moves along the inclined portion, it switches to the second state.

4. The laser cutting equipment for sheet metal processing according to claim 2, characterized in that: The mounting housing is further provided with a plurality of second guide grooves, which are respectively provided with a plurality of clamping plates; the ends of the clamping plates move along the inclined portion, and the middle portion of the clamping plates moves along the second guide grooves, so that the side edges of the clamping plates press against the top of the plate.

5. The laser cutting equipment for sheet metal processing according to claim 2, characterized in that: The mounting housing is also movably provided with multiple levels of push blocks, each level of push block corresponding to one of the clamping plates; each level of push block is used to push the corresponding clamping plate to move along the inclined portion.

6. The laser cutting equipment for sheet metal processing according to claim 5, characterized in that: The multi-level push blocks are distributed in series along the vertical direction and move sequentially from top to bottom.

7. The laser cutting equipment for sheet metal processing according to claim 5, characterized in that: Each of the push blocks is provided with a transmission rod, and the transmission rod located on the upper push block extends into the adjacent lower push block; when any of the clamping plates moves along the horizontal part, the clamping plate decouples the corresponding push block from the transmission rod of the upper push block.

8. The laser cutting equipment for sheet metal processing according to claim 5, characterized in that: The mounting housing is also provided with a push rod, which spans between the clamping plate and the corresponding push block; the end of the push rod is embedded in the corresponding push block to support the stop block, and the stop block is slidably installed in the push block and is used to couple with the upper-level push rod.

9. A laser cutting device for sheet metal processing according to claim 5, characterized in that: The mounting shell is also movably provided with a drive rod and a clamping block. The drive rod is used to drive the clamping block to move and fix the backing to the mounting rod. When the drive rod rotates, it can drive the uppermost push block to move in a direction perpendicular to the mounting shell.

10. A method for laser cutting sheet metal, characterized in that: The laser cutting equipment for sheet metal processing based on any one of claims 1-9 includes the following steps: S1. The sheet material to be cut is placed at the cutting station of the laser cutting machine; S2. Drive the backrest towards the side wall of the board, and keep the clamping plate in the side wall area horizontal, pressing against the board from the side. S3. The uppermost clamping plate moves to an inclined position first, extending to the outside of the mounting shell, with its side edges approaching the plate. S4. The remaining clamps located above the plate move from top to bottom to an inclined state, extending to the outside of the mounting shell, embedding between the upper clamp and the plate, bearing the downward pressure of the upper clamp, and transmitting it to the top of the plate. S5. Until the upper clamping plate adjacent to the clamping plate that abuts against the side wall of the plate is embedded between the inclined clamping plate and the plate, the clamping plate bears the downward pressure of the upper clamping plates and transmits the downward pressure to the top of the plate, pressing against the plate from the top.

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