Automatic piece cutting machine and piece cutting method thereof

Abstract

The invention relates to the technical field of automatic cutting, in particular to an automatic piece cutting machine and a piece cutting method thereof.The automatic piece cutting machine comprises a three-axis moving mechanism and a piece cutting mechanism, the piece cutting mechanism is fixedly arranged at the output end of the three-axis moving mechanism, and a piece cutting table is fixedly arranged at the bottom of the three-axis moving mechanism. The X-axis moving unit and the Z-axis moving unit are accurately controlled through an electronic numerical control system, so that the X-axis moving unit and the Z-axis moving unit cooperate to drive the piece cutting mechanism to move along the X axis and the Z axis, and meanwhile, the Y-axis moving unit drives the piece cutting mechanism to move downwards along the Z axis, so that a circular blade is tightly attached to the upper surface of an automobile interior trim skin material to roll, and the cutting efficiency is improved. In the process, the circular blade is rotationally connected with the assembly block through the follow-up tool rest and the notch follow-up rotating shaft, it is guaranteed that when the assembly block moves along the X axis and the Y axis, the notch of the circular blade is always kept consistent with the overall advancing direction of the assembly block, and it is guaranteed that the cut notch of the cut automotive trim skin is smooth.

Description

Technical Field

[0001] This invention relates to the field of automatic cutting technology, specifically to an automatic cutting machine and its cutting method. Background Technology

[0002] Automotive interior panel fabrication pieces are key components in seat upholstery production, and their design and manufacturing process directly affect the appearance, comfort, and production efficiency of the seats. In addition, panel fabrication technology is also widely used in modification scenarios such as center console and other interior component wrapping.

[0003] Currently, there are two main methods for cutting sheet materials: manual cutting and computer-aided cutting. Manual cutting has long been phased out of the market because its precision and efficiency cannot meet market demands. Computer-aided cutting, which is now widely used, typically uses a carbon dioxide laser cutter for cutting, such as the commonly available models "ETD-1390" and "ETD-1610". Although these devices have excellent cutting performance, their initial investment cost is high, and they require regular maintenance of the pipelines and the equipment's operating status. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic cutting machine and a cutting method thereof to solve the problems mentioned in the background art.

[0005] This invention provides the following technical solution: an automatic cutting machine, comprising: Three-axis moving mechanism; A cutting mechanism, fixedly mounted at the output end of a three-axis moving mechanism, is used for cutting pieces. The cutting mechanism includes: An assembly block is fixedly mounted at the bottom of the output end of the three-axis moving mechanism; The cutter follows the rotating shaft, and the cutter is vertically rotatable inside the assembly block; A follower tool holder, which is fixedly installed on the lower part of the outer wall of the follower rotating shaft of the cutting edge; The U-shaped groove is located at the end of the follower tool holder away from the cutting follower shaft; A circular blade, which is rotatably mounted inside a U-shaped groove; A cutting table is fixedly installed at the bottom of the three-axis moving mechanism to provide fixed support for the three-axis moving mechanism.

[0006] As a preferred embodiment of the present invention, the three-axis moving mechanism includes: X-axis moving unit, which is fixedly installed on the top of the cutting table, is used to drive the cutting mechanism to move along the X-axis direction; The Z-axis moving unit is fixedly installed at the output end of the X-axis moving unit and is used to drive the cutting mechanism to move along the Z direction; The Y-axis moving unit is fixedly installed at the output end of the Z-axis moving unit and is used to drive the cutting mechanism to move along the Y-axis direction.

[0007] As a preferred embodiment of the present invention, the cutting mechanism further includes: A reset cylinder is fixedly installed on the top of the cut follow-up rotating shaft; An end face cam groove is formed at the top of the reset cylinder; The fixing seat is fixedly installed on the top of the assembly block; Top plate, which is fixedly installed on the top of the fixed base; A linear cylinder, which is fixedly installed on the top of the top plate; A pusher block, which is fixedly installed at the bottom end of the output rod of the linear cylinder; The lifting block is fixedly installed at the bottom of the push block; The U-shaped sheet metal bracket is fixedly installed on one side of the lifting block near the reset cylinder. A pivot pin is fixedly installed on the side of the U-shaped sheet metal bracket away from the lifting block.

[0008] As a preferred embodiment of the present invention, the cutting mechanism further includes: An active magnetic block is fixedly installed at the bottom of a U-shaped sheet metal bracket. Angle code, which is fixedly installed on one side of the fixed base near the reset cylinder and located at the bottom of the active magnetic block; A sliding rod, which is vertically slidably disposed inside the corner bracket; Sheet metal sheet, which is fixedly installed on the top of the slide bar; The driven magnetic block is fixedly installed on the top of the sheet metal sheet and located directly below the active magnetic block.

[0009] As a preferred embodiment of the present invention, the cutting mechanism further includes: A torsion limiting insert is fixedly installed on the top end of the sheet metal sheet away from the fixing seat; A torque limiting slot is provided at the bottom edge of the reset cylinder, and its specifications and position are adapted to the torque limiting insert.

[0010] As a preferred embodiment of the present invention, a pressure roller is rotatably mounted on the outer wall of the shaft pin, the outer wall of the pressure roller is in rolling connection with the surface of the end face cam groove, the opening height of the end face cam groove trajectory decreases sequentially towards the fixed seat, and the position of the circular blade corresponds to the highest position of the end face cam groove trajectory.

[0011] As a preferred embodiment of the present invention, the corner bracket has two mounting holes at the top, and the two mounting holes are symmetrically arranged about the central axis of the corner bracket. A linear sliding sleeve is fixedly installed inside each of the two mounting holes. There are two sliding rods, and the outer walls of the two sliding rods are slidably connected to the inner walls of the two linear sliding sleeves respectively.

[0012] As a preferred embodiment of the present invention, springs are sleeved around the periphery of each slide rod. The springs are fixedly installed between the top of the linear slide sleeve and the bottom of the sheet metal plate. The elastic force of the two springs is less than the magnetic force of the driven magnetic block and the active magnetic block.

[0013] As a preferred embodiment of the present invention, two linear guide rails are fixedly installed on one side of the fixed base near the lifting block. The two linear guide rails are symmetrically arranged about the central axis of the fixed base. Linear sliders are slidably installed around the periphery of each linear guide rail. The linear sliders are fixedly connected to the lifting block by bolts.

[0014] A cutting method for an automatic cutting machine, comprising the following steps: S1. Lay the automotive interior leather material flat on the top of the cutting table in a suitable position; S2. Drive the cutting mechanism to move downward along the Y-axis through the three-axis moving mechanism, so that the circular blade is in close contact with the upper surface of the car interior leather. Then, drive the cutting mechanism to move along the X-axis and Z-axis, and move the cutting mechanism together to cut the car interior leather material into the required pattern. S3. After cutting the piece, the output rod of the linear cylinder pushes the push block and the lifting block downwards. The lifting block drives the U-shaped sheet metal bracket, the shaft pin and the pressure roller to move downwards together. During the downward movement of the pressure roller, it squeezes the end face of the end face cam groove, causing the reset cylinder to rotate until the pressure roller moves to the lowest position of the end face cam groove path. The reset cylinder stops rotating, causing the circular blade to return to the initial cutting position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses an electronic numerical control system to precisely control the X-axis and Z-axis moving units, enabling them to work together to drive the cutting mechanism to move along the X and Z axes. Simultaneously, the Y-axis moving unit drives the cutting mechanism to move downward along the Z axis, causing the circular blade to roll close to the upper surface of the automotive interior leather material, thereby cutting the leather material into the desired shape. During this process, the circular blade is rotatably connected to the assembly block through a follower blade holder and a cutting follower shaft, ensuring that the cutting edge of the circular blade is always consistent with the overall travel direction of the assembly block when the assembly block moves along the X and Y axes, thus ensuring a smooth cut on the cut automotive interior leather piece.

[0016] 2. After the cutting is completed, the output rod of the linear cylinder pushes the push block and the lifting block downwards. Since the lifting block is slidably connected to the two linear guide rails through two linear sliders, the movement of the lifting block can be more stable. The downward movement of the lifting block drives the U-shaped sheet metal bracket, the shaft pin and the pressure roller to move down together. During the downward movement of the pressure roller, the end face of the end face cam groove is squeezed, causing the reset cylinder to rotate. When the pressure roller moves to the lowest position of the end face cam groove path, the reset cylinder stops rotating. During this process, the reset cylinder drives the circular blade to rotate together through the connection between the cutting follower shaft and the follower blade holder, so that the circular blade returns to the initial cutting position, so that it can start cutting directly when cutting the next automotive interior skin.

[0017] 3. During the downward movement of the U-shaped sheet metal bracket of this invention, the active magnetic block is also moved downward, gradually approaching the top of the driven magnetic block. This makes the magnetic force between the active and driven magnetic blocks more significant until the active magnetic block attracts the driven magnetic block upward. During this process, the driven magnetic block moves the torsion limiting rod upward, and the sheet metal sheet can maintain greater stability through the sliding connection between the two sliding rods and the linear sliding sleeve. At the same time, the upward movement of the sheet metal sheet causes the two springs to be stretched and accumulate elastic force, and the torsion limiting rod moves upward and finally gets stuck inside the torsion limiting slot, thereby thoroughly limiting the torsion of the reset cylinder and preventing the circular blade from deflecting during the cutting process, thus ensuring the accuracy of the automotive interior skin cutting piece.

[0018] 4. In this invention, after the initial cut, the output rod of the linear cylinder drives the push block, lifting block, U-shaped sheet metal bracket, shaft pin, pressure roller, and active magnetic block to return to their original positions. Then, as the pressure roller separates from the end face cam groove, the return cylinder can rotate freely, facilitating the adjustment of the cutting path direction of the circular blade. At the same time, after the active magnetic block moves upward, the distance between it and the driven magnetic block increases, and the magnetic force between them weakens. This causes the two stored springs to release their rebound force, pulling the sheet metal piece and the torsion limiting rod downward, causing the torsion limiting rod to exit from the torsion limiting slot, releasing the torsion limiting on the return cylinder, thereby preventing interference with the normal cutting path of the circular blade during subsequent cutting processes. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the automatic cutting machine of the present invention; Figure 2 This is a front view structural diagram of the automatic cutting machine of the present invention; Figure 3 This is a schematic diagram of the three-axis moving mechanism of the automatic cutting machine of the present invention; Figure 4 This is a first-view structural schematic diagram of the cutting mechanism of the automatic cutting machine of the present invention; Figure 5 This is a second-view structural schematic diagram of the cutting mechanism of the automatic cutting machine of the present invention; Figure 6 This is a third-view structural schematic diagram of the cutting mechanism of the automatic cutting machine of the present invention; Figure 7 This is an enlarged structural schematic diagram of the cutting mechanism of the automatic cutting machine of the present invention; Figure 8 The automatic cutting machine of the present invention Figure 7 A schematic diagram of the unfolded structure of the components; Figure 9 This is a schematic diagram of the structure of the reset cylinder of the automatic cutting machine of the present invention.

[0020] In the diagram: 100, Three-axis moving mechanism; 101, X-axis moving unit; 102, Z-axis moving unit; 103, Y-axis moving unit; 200, Cutting piece mechanism; 201, Assembly block; 202, Cutting follower shaft; 203, Follower blade holder; 204, U-shaped groove; 205, Circular blade; 206, Return cylinder; 207, End face cam groove; 208, Fixed base; 209, Top plate; 2010, Linear cylinder; 2011, Push block; 20 12. Lifting block; 2013. U-shaped sheet metal bracket; 2014. Shaft pin; 2015. Pressure roller; 2016. Active magnetic block; 2017. Corner bracket; 2018. Mounting hole; 2019. Slide rod; 2020. Sheet metal piece; 2021. Driven magnetic block; 2022. Torque limiting rod; 2023. Torque limiting slot; 2024. Spring; 2026. Linear sliding sleeve; 2027. Linear guide rail; 2028. Linear slider; 300. Cutting table. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-9 The technical solution provided by the present invention specifically includes the following embodiments: An automatic piece cutting machine includes a three-axis moving mechanism 100 and a piece cutting mechanism 200. The piece cutting mechanism 200 is fixedly installed at the output end of the three-axis moving mechanism 100 and is used for cutting pieces. The piece cutting table 300 is fixedly installed at the bottom of the three-axis moving mechanism 100 and is used for fixed support of the three-axis moving mechanism 100. The three-axis moving mechanism 100 includes an X-axis moving unit 101, a Z-axis moving unit 102, and a Y-axis moving unit 103. The X-axis moving unit 101 is fixedly mounted on the top of the cutting table 300 and is used to drive the cutting mechanism 200 to move along the X-axis direction. The Z-axis moving unit 102 is fixedly mounted on the output end of the X-axis moving unit 101 and is used to drive the cutting mechanism 200 to move along the Z-axis direction. The Y-axis moving unit 103 is fixedly mounted on the output end of the Z-axis moving unit 102 and is used to drive the cutting mechanism 200 to move along the Y-axis direction. The cutting mechanism 200 includes an assembly block 201, a cutting follower shaft 202, a follower knife holder 203, a U-shaped groove 204, and a circular blade 205. The assembly block 201 is fixedly installed at the bottom of the output end of the three-axis moving mechanism 100. The cutting follower shaft 202 is vertically rotatably installed inside the assembly block 201. The follower knife holder 203 is fixedly installed on the lower part of the outer wall of the cutting follower shaft 202. The U-shaped groove 204 is opened at the end of the follower knife holder 203 away from the cutting follower shaft 202. The circular blade 205 is rotatably installed inside the U-shaped groove 204.

[0023] Specifically, the automotive interior leather material is laid flat on top of the cutting table 300. The X-axis moving unit 101 and the Z-axis moving unit 102 are precisely controlled by the electronic numerical control system, so that the X-axis moving unit 101 and the Z-axis moving unit 102 work together to drive the cutting mechanism 200 to move along the X-axis and Z-axis. At the same time, the Y-axis moving unit 103 drives the cutting mechanism 200 to move downward along the Z-axis, so that the circular blade 205 rolls close to the upper surface of the automotive interior leather material, thereby cutting the leather material into the required pattern. During this process, the circular blade 205 is rotatably connected to the assembly block 201 through the follower blade holder 203 and the cutting follower rotating shaft 202, ensuring that the cutting edge of the circular blade 205 is always consistent with the overall travel direction of the assembly block 201 when the assembly block 201 moves along the X-axis and Y-axis, so as to ensure that the cut edge of the cut automotive interior leather piece is smooth.

[0024] For further details, please refer to [link / reference]. Figures 6-8 As shown: The cutting mechanism 200 also includes a reset cylinder 206, an end face cam groove 207, a fixed seat 208, a top plate 209, a linear cylinder 2010, a push block 2011, a lifting block 2012, a U-shaped sheet metal bracket 2013, a shaft pin 2014, a linear guide rail 2027, and a linear slider 2028. The reset cylinder 206 is fixedly installed on the top of the cutting follow-up rotating shaft 202. The end face cam groove 207 is formed on the top of the reset cylinder 206. The fixed seat 208 is fixedly installed on the top of the assembly block 201. The top plate 209 is fixedly installed on the top of the fixed seat 208. The linear cylinder 2010 is fixedly installed on the top of the top plate 209. The push block 2011 is fixedly installed on the bottom end of the output rod of the linear cylinder 2010. The lifting block 2012 is fixedly installed on the bottom of the push block 2011. The U-shaped sheet metal bracket 2013 is fixedly installed on the lifting block 2028. On one side of block 2012 near the reset cylinder 206, pin 2014 is fixedly installed on the side of U-shaped sheet metal bracket 2013 away from lifting block 2012. A pressure roller 2015 is rotatably installed on the outer wall of pin 2014. The outer wall of pressure roller 2015 is in rolling connection with the surface of end face cam groove 207. The height of the end face cam groove 207 trajectory decreases sequentially towards the fixed seat 208. The position of circular blade 205 corresponds to the highest position of the end face cam groove 207 trajectory. Two linear guide rails 2027 are fixedly installed on the side of fixed seat 208 near lifting block 2012. The two linear guide rails 2027 are symmetrically arranged about the central axis of fixed seat 208. Linear sliders 2028 are slidably installed on the periphery of linear guide rails 2027. The linear sliders 2028 are fixedly connected to lifting block 2012 by bolts.

[0025] Specifically, after the automotive interior panel fabric is cut, the Y-axis moving unit 103 drives the cutting mechanism 200 to reset upwards along the Y-axis, separating the circular blade 205 from the cut automotive interior panel fabric. Then, the X-axis moving unit 101 and the Z-axis moving unit 102 drive the cutting mechanism 200 to reset. During this process, since the circular blade 205 separates upwards from the automotive interior panel fabric, it will not cause damage to the cut automotive interior panel fabric. After the X-axis moving unit 101 and the Z-axis moving unit 102 drive the cutting mechanism 200 to reset, the CNC system controls the air pump to deliver high-pressure gas into the linear cylinder 2010, causing the output rod of the linear cylinder 2010 to push the push block 2011 and the lifting block 2012 downwards. Because the lifting block 2012 moves through two... The linear slider 2028 is slidably connected to the two linear guide rails 2027, thus ensuring a more stable movement of the lifting block 2012. The downward movement of the lifting block 2012 causes the U-shaped sheet metal bracket 2013, the shaft pin 2014, and the pressure roller 2015 to move downward together. During the downward movement of the pressure roller 2015, it presses the end face of the end face cam groove 207, causing the reset cylinder 206 to rotate. When the pressure roller 2015 moves to the lowest position of the path of the end face cam groove 207, the reset cylinder 206 stops rotating. During this process, the reset cylinder 206 drives the circular blade 205 to rotate together through the connection between the cutting follower shaft 202 and the follower knife holder 203, so that the circular blade 205 returns to the initial cutting position, so that it can start cutting directly when cutting the next automotive interior skin.

[0026] For further details, please refer to [link / reference]. Figure 8 and Figure 9 As shown: The cutting mechanism 200 also includes an active magnetic block 2016, a corner bracket 2017, a mounting hole 2018, a slide rod 2019, a sheet metal sheet 2020, a driven magnetic block 2021, a torque-limiting insert 2022, and a torque-limiting slot 2023. The active magnetic block 2016 is fixedly installed at the bottom of the U-shaped sheet metal bracket 2013. The corner bracket 2017 is fixedly installed on one side of the fixing base 208 near the reset cylinder 206 and located at the bottom of the active magnetic block 2016. The slide rod 2019 is vertically slidably disposed inside the corner bracket 2017. The sheet metal sheet 2020 is fixedly installed at the top of the slide rod 2019. The driven magnetic block 2021 is fixedly installed at the top of the sheet metal sheet 2020 and located directly below the active magnetic block 2016. The torque-limiting insert 2022 is fixedly installed on the top of the sheet metal sheet 2020 away from the fixing base 208. At the end, the torque limiting slot 2023 is opened at the bottom edge of the reset cylinder 206, and its specifications and position are adapted to the torque limiting plug 2022. The top of the corner bracket 2017 has two mounting holes 2018, which are symmetrically arranged about the central axis of the corner bracket 2017. A linear sliding sleeve 2026 is fixedly installed inside each of the two mounting holes 2018. There are two sliding rods 2019, and the outer walls of the two sliding rods 2019 are slidably connected to the inner walls of the two linear sliding sleeves 2026 respectively. A spring 2024 is sleeved around each of the sliding rods 2019. The springs 2024 are fixedly installed between the top of the linear sliding sleeve 2026 and the bottom of the sheet metal piece 2020. The elastic force of the two springs 2024 is less than the magnetic force of the driven magnetic block 2021 and the active magnetic block 2016.

[0027] Specifically, as the U-shaped sheet metal bracket 2013 moves downward, it drives the active magnetic block 2016 downward as well, causing the active magnetic block 2016 to gradually approach the top of the driven magnetic block 2021. This makes the magnetic force between the active magnetic block 2016 and the driven magnetic block 2021 more significant, until the active magnetic block 2016 attracts the driven magnetic block 2021 upward. During this process, the driven magnetic block 2021 drives the torsion limiting rod 2022 upward as well. The sheet metal piece 2020 maintains greater stability through the sliding connection between the two sliding rods 2019 and the linear sliding sleeve 2026. At the same time, the upward movement of the sheet metal piece 2020 causes the two springs 2024 to be stretched and accumulate elastic force. The torsion limiting rod 2022 moves upward and eventually engages inside the torsion limiting slot 2023, thereby completely limiting the torsion of the reset cylinder 206 and preventing the circular blade 205 from deflecting during the cutting process. To ensure the precision of the automotive interior leather cutting pieces, after the initial cut, the output rod of the linear cylinder 2010 drives the push block 2011, lifting block 2012, U-shaped sheet metal bracket 2013, shaft pin 2014, pressure roller 2015, and active magnetic block 2016 to return to their original position. Then, as the pressure roller 2015 separates from the end face cam groove 207, the return cylinder 206 can rotate freely, facilitating the adjustment of the cutting path direction of the circular blade 205. At the same time, after the active magnetic block 2016 moves upward, the distance between it and the driven magnetic block 2021 increases, and the magnetic force between them weakens. This causes the two stored springs 2024 to release their rebound force, pulling the sheet metal piece 2020 and the torque limiting rod 2022 downward. This causes the torque limiting rod 2022 to exit from the torque limiting slot 2023, releasing the torque limitation on the return cylinder 206, thereby preventing interference with the normal cutting of the circular blade 205 during subsequent cutting processes.

[0028] A cutting method for an automatic cutting machine, comprising the following steps: S1. Lay the automotive interior leather material flat on the top of the cutting table at a suitable position; S2. The three-axis moving mechanism 100 drives the cutting mechanism 200 to move downward along the Y-axis, so that the circular blade 205 is in close contact with the upper surface of the car interior leather. Then, the three-axis moving mechanism 100 drives the cutting mechanism 200 to move along the X-axis and Z-axis, and moves the cutting mechanism 200 together to cut the car interior leather material into the required pattern. S3. After cutting, the output rod of the linear cylinder 2010 pushes the push block 2011 and the lifting block 2012 downwards. The lifting block 2012 moves downwards, causing the U-shaped sheet metal bracket 2013, the shaft pin 2014 and the pressure roller 2015 to move downwards together. During the downward movement of the pressure roller 2015, it squeezes the end face of the end face cam groove 207, causing the reset cylinder 206 to rotate until the pressure roller 2015 moves to the lowest position of the path of the end face cam groove 207. The reset cylinder 206 stops rotating, causing the circular blade 205 to return to the initial cutting position.

[0029] When the automatic cutting machine of this invention is working, the automotive interior leather material is laid flat on top of the cutting table 300. Through precise control of the X-axis moving unit 101 and the Z-axis moving unit 102 by the electronic numerical control system, the X-axis moving unit 101 and the Z-axis moving unit 102 work together to drive the cutting mechanism 200 to move along the X and Z axes. Simultaneously, the Y-axis moving unit 103 drives the cutting mechanism 200 to move downwards along the Z axis, causing the circular blade 205 to roll close to the upper surface of the automotive interior leather material, thereby cutting the leather material into the desired shape. During this process, the circular blade 205 is rotatably connected to the assembly block 201 through the follower blade holder 203 and the cutting follower rotating shaft 202, ensuring that the assembly block 201 moves along the X and Y axes. The cutting edge of the circular blade 205 is always aligned with the overall travel direction of the assembly block 201 to ensure a smooth cut on the cut automotive interior panel. After the automotive interior panel is cut, the Y-axis moving unit 103 drives the cutting mechanism 200 to reset upward along the Y-axis, separating the circular blade 205 from the cut automotive interior panel. Then, the X-axis moving unit 101 and the Z-axis moving unit 102 drive the cutting mechanism 200 to reset to its initial position. During this process, since the circular blade 205 separates upward from the automotive interior panel, it will not damage the cut automotive interior panel. Then, the cut automotive interior panel and scrap material at the top of the cutting table 300 are removed, and the next piece of material is placed. When the X-axis moving unit 101 and the Z-axis moving unit 102 drive the cutting mechanism 200 to reset, the CNC system controls the air pump to deliver high-pressure gas into the linear cylinder 2010, causing the output rod of the linear cylinder 2010 to push the push block 2011 and the lifting block 2012 downwards. Since the lifting block 2012 is slidably connected to the two linear guide rails 2027 through two linear sliders 2028, the movement of the lifting block 2012 can be ensured to be more stable. The downward movement of the lifting block 2012 drives the U... The sheet metal bracket 2013, shaft pin 2014, and pressure roller 2015 move downwards together. During this downward movement, the pressure roller 2015 presses against the end face of the end face cam groove 207, causing the reset cylinder 206 to rotate. When the pressure roller 2015 reaches the lowest position along the path of the end face cam groove 207, the reset cylinder 206 stops rotating. During this process, the reset cylinder 206, through the connection between the cutting follower shaft 202 and the follower tool holder 203, drives the circular blade 205 to rotate, causing the circular blade 205 to return to its original position. The initial cutting position is designed to facilitate direct cutting when cutting a piece of automotive interior paneling. As the U-shaped sheet metal bracket 2013 moves downwards, it also moves the active magnetic block 2016 downwards, gradually bringing it closer to the top of the driven magnetic block 2021. This strengthens the magnetic force between the active and driven magnetic blocks 2016 until the active magnetic block 2016 attracts the driven magnetic block 2021 upwards. During this process, the driven magnetic block 2021 drives the torque-limiting... The insert rod 2022 moves upward together, and the sheet metal sheet 2020 can maintain greater stability through the sliding connection between the two slide rods 2019 and the linear slide sleeve 2026. At the same time, the upward movement of the sheet metal sheet 2020 causes the two springs 2024 to be stretched and accumulate elastic force, while the torque limiting insert rod 2022 moves upward and finally gets into the torque limiting slot 2023, thereby completely limiting the torque of the reset cylinder 206 and preventing the circular blade 205 from deflecting during the cutting process, thus ensuring the accuracy of the automotive interior skin cutting piece; After the cut is initiated, the output rod of the linear cylinder 2010 drives the push block 2011, the lifting block 2012, the U-shaped sheet metal bracket 2013, the shaft pin 2014, the pressure roller 2015, and the active magnetic block 2016 to return to their original position. Then, as the pressure roller 2015 separates from the end face cam groove 207, the return cylinder 206 can rotate freely, facilitating the adjustment of the cutting path direction of the circular blade 205. At the same time, after the active magnetic block 2016 moves upward, the distance between it and the driven magnetic block 2021 increases, and the magnetic force between them weakens. This causes the two stored springs 2024 to release their rebound force, pulling the sheet metal piece 2020 and the torque limiting rod 2022 downward. This causes the torque limiting rod 2022 to exit from the torque limiting slot 2023, releasing the torque limitation on the return cylinder 206 and preventing interference with the normal cutting of the circular blade 205 during subsequent cutting processes.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An automatic piece cutting machine, characterized in that, include: Three-axis moving mechanism (100); A cutting mechanism (200) is fixedly mounted at the output end of a three-axis moving mechanism (100) for cutting pieces. The cutting mechanism (200) includes: Assembly block (201), said assembly block (201) is fixedly disposed at the bottom of the output end of the three-axis moving mechanism (100); A cut follower shaft (202) is vertically rotatable inside the assembly block (201); Follower tool holder (203), which is fixedly installed on the lower part of the outer wall of the cutting follower rotating shaft (202); U-shaped groove (204), the U-shaped groove (204) is formed at one end of the follower tool holder (203) away from the cutting follower shaft (202); A circular blade (205) is rotatably mounted inside a U-shaped groove (204); A cutting table (300) is fixedly installed at the bottom of the three-axis moving mechanism (100) to provide fixed support for the three-axis moving mechanism (100).

2. The automatic cutting machine according to claim 1, characterized in that, The three-axis moving mechanism (100) includes: X-axis moving unit (101), the X-axis moving unit (101) is fixedly installed on the top of the cutting table (300) and is used to drive the cutting mechanism (200) to move along the X-axis direction; Z-axis moving unit (102), which is fixedly installed at the output end of X-axis moving unit (101) and is used to drive the cutting mechanism (200) to move along the Z direction; Y-axis moving unit (103), which is fixedly installed at the output end of Z-axis moving unit (102), is used to drive the cutting mechanism (200) to move along the Y-axis direction.

3. An automatic piece cutting machine according to claim 2, characterized in that, The cutting mechanism (200) also includes: A reset cylinder (206) is fixedly installed on the top of the cut follower shaft (202); End face cam groove (207), the end face cam groove (207) is formed on the top of the reset cylinder (206); A fixing seat (208) is fixedly installed on the top of the assembly block (201); Top plate (209), which is fixedly installed on the top of the fixed base (208); A linear cylinder (2010) is fixedly installed on the top of the top plate (209); Push block (2011), which is fixedly installed at the bottom end of the output rod of linear cylinder (2010); A lifting block (2012) is fixedly installed at the bottom of the push block (2011); U-shaped sheet metal bracket (2013), said U-shaped sheet metal bracket (2013) is fixedly installed on one side of the lifting block (2012) near the reset cylinder (206); A pivot pin (2014) is fixedly installed on the side of the U-shaped sheet metal bracket (2013) away from the lifting block (2012).

4. An automatic piece cutting machine according to claim 3, characterized in that, The cutting mechanism (200) also includes: An active magnetic block (2016) is fixedly installed at the bottom of a U-shaped sheet metal bracket (2013); Angle code (2017) is fixedly installed on one side of the fixed base (208) near the reset cylinder (206) and located at the bottom of the active magnetic block (2016); A slide bar (2019) is vertically slidably disposed inside the corner bracket (2017); Sheet metal sheet (2020), said sheet metal sheet (2020) is fixedly installed on the top of slide bar (2019); The driven magnetic block (2021) is fixedly installed on the top of the sheet metal sheet (2020) and located directly below the active magnetic block (2016).

5. An automatic piece cutting machine according to claim 4, characterized in that, The cutting mechanism (200) also includes: Torque limiting plug (2022), said torque limiting plug (2022) is fixedly installed on the top end of the sheet metal sheet (2020) away from the fixed seat (208); Torque limiting slot (2023) is provided at the bottom edge of the reset cylinder (206) and its specifications and position are adapted to the torque limiting plug (2022).

6. An automatic piece cutting machine according to claim 5, characterized in that, A pressure roller (2015) is rotatably mounted on the outer wall of the shaft pin (2014). The outer wall of the pressure roller (2015) is in rolling connection with the surface of the end face cam groove (207). The height of the end face cam groove (207) trajectory decreases sequentially towards the fixed seat (208). The position of the circular blade (205) corresponds to the highest position of the end face cam groove (207) trajectory.

7. An automatic piece cutting machine according to claim 6, characterized in that, The corner bracket (2017) has two mounting holes (2018) at its top. The two mounting holes (2018) are symmetrically arranged about the central axis of the corner bracket (2017). A linear sliding sleeve (2026) is fixedly installed inside each of the two mounting holes (2018). There are two sliding rods (2019), and the outer walls of the two sliding rods (2019) are slidably connected to the inner walls of the two linear sliding sleeves (2026).

8. An automatic piece cutting machine according to claim 7, characterized in that, Springs (2024) are fitted around the slide rod (2019). The springs (2024) are fixedly installed between the top of the linear slide sleeve (2026) and the bottom of the sheet metal sheet (2020). The elastic force of the two springs (2024) is less than the magnetic force of the driven magnetic block (2021) and the active magnetic block (2016).

9. An automatic cutting machine according to claim 8, characterized in that, Two linear guide rails (2027) are fixedly installed on one side of the fixed base (208) near the lifting block (2012). The two linear guide rails (2027) are symmetrically arranged about the central axis of the fixed base (208). Linear sliders (2028) are slidably installed on the periphery of each linear guide rail (2027). The linear sliders (2028) are fixedly connected to the lifting block (2012) by bolts.

10. A cutting method for an automatic cutting machine, using the automatic cutting machine according to any one of claims 1-9, characterized in that, The steps are as follows: S1. Lay the automotive interior leather material flat on the top of the cutting table (300) at a suitable position; S2. The three-axis moving mechanism (100) drives the cutting mechanism (200) to move downward along the Y-axis, so that the circular blade (205) is in close contact with the upper surface of the car interior leather. Then, the three-axis moving mechanism (100) drives the cutting mechanism (200) to move along the X-axis and Z-axis, and moves the cutting mechanism (200) together to cut the car interior leather material into the required pattern. S3. After cutting the piece, the output rod of the linear cylinder (2010) pushes the push block (2011) and the lifting block (2012) downwards. The lifting block (2012) moves downwards, causing the U-shaped sheet metal bracket (2013), the shaft pin (2014) and the pressure roller (2015) to move downwards together. During the downward movement of the pressure roller (2015), it squeezes the end face of the end face cam groove (207), causing the reset cylinder (206) to rotate until the pressure roller (2015) moves to the lowest position of the path of the end face cam groove (207). The reset cylinder (206) stops rotating, causing the circular blade (205) to return to the initial cutting position.

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