CCD (Charge Coupled Device) positioning and deviation rectifying die-cutting machine

Abstract

The invention discloses a CCD (Charge Coupled Device) positioning deviation-rectifying die-cutting machine, which particularly relates to the technical field of machining equipment, and comprises a rack, a lower die holder mounted on the rack, an upper die holder arranged above the lower die holder in a lifting manner, and a stamping driving mechanism for driving the upper die holder to lift, and further comprises a visual inspection assembly fixedly mounted above the upper die holder, the upper die base is arranged on the rack, is static relative to the rack and is used for collecting a positioning mark image on a material belt to be subjected to die cutting, and the light-transmitting die cutting assembly comprises an upper cutting die fixedly installed at the bottom of the upper die base. According to the CCD positioning and deviation rectifying die-cutting machine, the visual detection assembly is fixedly installed above the upper die base and is static relative to the rack, image blurring caused by vibration along with high-frequency lifting of the upper die base is avoided, meanwhile, in-situ image collection over a die-cutting station is achieved in cooperation with a shooting hole formed in the upper cutting die and a light-transmitting hole in the upper die base, and the effect that the die-cutting efficiency is improved is achieved. And the accuracy and the real-time performance of image processing are improved.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and in particular to a CCD positioning and correction die-cutting machine. Background Technology

[0002] Die-cutting machines are widely used processing equipment in industries such as packaging, printing, electronic labels, and flexible circuit boards. Their main function is to cut rolls or sheets of raw materials into predetermined shapes through the cooperation of upper and lower dies. As downstream consumer electronics and medical devices move towards miniaturization and high precision, the dimensional tolerance requirements for die-cutting are becoming increasingly stringent. Currently, most traditional die-cutting machines on the market use mechanical positioning. These machines typically have mechanical gauges or lateral pushers positioned before and after the die-cutting station, using physical contact to correct the position of the material strip. However, in actual production, due to tension fluctuations, uneven thickness, or cumulative errors during long-distance transport, the pattern to be processed or the pre-printed positioning cursor often shifts relative to the die-cutting tool. This mechanical positioning method is not only cumbersome to adjust, requiring repeated manual adjustments of the gauge position during material changes, but it is also highly susceptible to reference shifts due to vibration or high-speed operation, resulting in a large number of defective products. To address these issues, a few improved die-cutting machines have introduced CCD vision inspection systems. The existing technology has the following problems: Most existing CCD die-cutting devices employ an open-loop or semi-closed-loop control mode that uses detection followed by compensation. For example, some devices install the CCD sensor at the front end of the die-cutting station, using it only for pre-alignment during material feeding. After detecting a deviation, a separate correction platform corrects it, and then the feeding mechanism delivers the material strip into the die-cutting station. While this structure improves positioning accuracy to some extent, the physical distance between the detection position and the die-cutting execution position cannot eliminate instantaneous errors caused by secondary conveying or platform vibration. Furthermore, the equipment has a complex structure, occupies a large space, and is costly.

[0003] In addition, some existing technologies attempt to fix the CCD sensor above the upper mold base and acquire images by opening an observation window on the upper mold base or upper die. However, in practical applications, this method is limited by installation space, often resulting in a narrow field of view, difficulty in light source arrangement, and the high-frequency vibration of the camera as the upper mold moves up and down can easily cause image blurring, affecting the accuracy and real-time performance of image processing. Summary of the Invention

[0004] The main objective of this invention is to provide a CCD positioning and correction die-cutting machine that can effectively solve the problems of existing CCD die-cutting devices being unable to eliminate the instantaneous error caused by secondary transport due to the physical distance between the detection position and the die-cutting execution position, as well as the image blurring and impact on processing accuracy caused by the high-frequency lifting and lowering vibration of the camera with the upper mold.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A CCD positioning and correction die-cutting machine includes a frame, a lower die base mounted on the frame, an upper die base that is vertically and flexibly disposed above the lower die base, and a stamping drive mechanism for driving the upper die base to rise and fall. It also includes a vision inspection component, which is fixedly installed above the upper die base and is relatively stationary with respect to the frame, for acquiring images of positioning marks on the strip to be die-cut.

[0006] The light-transmitting die-cutting assembly includes an upper die fixedly installed at the bottom of the upper die base. The upper die has at least one imaging hole extending through its thickness direction. The upper die base has a light-transmitting hole at the position corresponding to the imaging hole, which is adapted to the optical path of the visual inspection assembly.

[0007] The correction mechanism is installed on the lower die base and is used to carry and drive the strip to be die-cut to make micro-adjustments in the X-axis and Y-axis directions in the horizontal plane.

[0008] The vision controller is electrically connected to both the vision detection component and the correction actuator, and is used to receive image information, analyze deviation values, and control the action of the correction actuator.

[0009] Preferably, the vision inspection component includes at least one CCD industrial camera and an auxiliary light that provides illumination for it. The CCD industrial camera is fixedly connected to the frame or the fixed part of the stamping drive mechanism by a rigid bracket, and its lens is vertically downward and aligned with the light-transmitting hole.

[0010] Preferably, the shooting hole and the light-transmitting hole are coaxially arranged in the vertical direction, and the aperture of the shooting hole is larger than the field of view of the CCD industrial camera, and a transparent protective lens is embedded in the light-transmitting hole.

[0011] Preferably, the correction actuator includes a drive box one fixed on the lower mold base, a servo motor one fixedly mounted at one end of the drive box one, the output shaft of which passes through the inner cavity of the drive box one and is mounted on a ball screw one, a drive box two threadedly mounted on the outer wall of the ball screw one, a limit slide rod one fixedly mounted between the two sides of the inner cavity of the drive box one, the drive box two slidably connected to the limit slide rod one, a servo motor two fixedly mounted at one end of the drive box two, the output shaft of which passes through the inner cavity of the drive box two and is mounted on a ball screw two, a correction plate threadedly mounted on the outer wall of the ball screw two, a limit slide rod two fixedly mounted between the two sides of the inner cavity of the drive box two, the correction plate slidably connected to the limit slide rod two.

[0012] Preferably, the stamping drive mechanism includes a hydraulic cylinder fixedly installed on the top of the frame, the output end of which is fixedly connected to the top of the upper die base. The stamping drive mechanism also includes a plurality of guide rods fixedly installed on the top of the lower die base, and the upper die base is slidably connected to the guide rods.

[0013] Preferably, the vision controller controls the vision inspection component to acquire images when the upper die holder rises to its highest point and the upper die is completely separated from the material strip within one stamping work cycle.

[0014] Preferably, it also includes a human-machine interface electrically connected to the vision controller, used to display positioning mark images, set reference positions, and manually control the action of the correction actuator.

[0015] Preferably, the vision inspection component includes two CCD industrial cameras arranged at intervals along the conveying direction of the material strip, each corresponding to a positioning mark on the material strip to be die-cut.

[0016] Preferably, auxiliary demolding modules are provided on both sides of the upper die. The auxiliary demolding module includes a retraction box, in which a spring is fixedly installed. A limiting slide is fixedly installed at the bottom end of the spring. The limiting slide is slidably connected to the inner cavity of the retraction box. A pushing block is fixedly installed at the bottom of the retraction box. The bottom end of the pushing block penetrates to the bottom of the retraction box and extends to the bottom surface of the upper die.

[0017] Preferably, both drive box one and drive box two are hollow structures, and ball screw one and ball screw two are rotatably connected to drive box one and drive box two respectively through bearings.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a CCD positioning and correction die-cutting machine, in which the vision detection component is fixedly installed above the upper die base and is relatively stationary with respect to the machine frame, avoiding image blurring caused by high-frequency lifting and vibration of the upper die base. At the same time, in conjunction with the imaging hole opened in the upper die and the light-transmitting hole of the upper die base, in-situ image acquisition is realized directly above the die-cutting station, improving the accuracy and real-time performance of image processing.

[0019] This invention provides a CCD positioning and correction die-cutting machine. The correction actuator directly carries the material strip at the die-cutting station to make micro-adjustments in the X and Y axes. The vision controller analyzes the deviation in real time based on the acquired image and drives the correction, eliminating the physical distance between the detection position and the die-cutting execution position, realizing closed-loop control, and effectively compensating for the instantaneous error in the conveying process.

[0020] This invention provides a CCD positioning and correction die-cutting machine. Its vision controller acquires images when the upper die holder rises to its highest point and the upper die is completely separated from the material strip, avoiding interference from the stamping action on visual inspection and ensuring the stability of the acquired images. At the same time, the auxiliary demolding modules set on both sides of the upper die use spring reset to push the push block, effectively preventing the material strip from sticking and improving the continuity and reliability of automated production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the upper mold base structure of the present invention; Figure 3 This is a schematic diagram of the corrective actuator structure of the present invention; Figure 4 This is a schematic diagram of the visual inspection component structure of the present invention; Figure 5 This is a schematic diagram of the stamping drive mechanism of the present invention; Figure 6 This is a schematic diagram of the auxiliary demolding module structure of the present invention.

[0022] In the diagram: 1. Frame; 2. Lower mold base; 3. Upper mold base; 31. Light transmission hole; 4. Stamping drive mechanism; 41. Hydraulic cylinder; 42. Guide rod; 5. Vision inspection component; 51. Rigid bracket; 52. CCD industrial camera; 53. Fill light; 6. Transparent die-cutting component; 61. Upper die; 62. Imaging hole; 63. Transparent protective lens; 64. Auxiliary demolding module; 641. Retraction box; 642. Spring; 643. Limiting slide plate; 644. Push block; 7. Correction actuator; 71. Drive box one; 72. Servo motor one; 73. Ball screw one; 74. Limiting slide bar one; 75. Drive box two; 76. Servo motor two; 77. Ball screw two; 78. Limiting slide bar two; 79. Correction plate; 8. Vision controller; 9. Human-machine interface. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown, a CCD positioning and correction die-cutting machine includes a frame 1, a lower die base 2 fixedly installed on the frame 1, an upper die base 3 vertically disposed above the lower die base 2, and a stamping drive mechanism 4 for driving the upper die base 3 to rise and fall.

[0025] refer to Figure 1 and Figure 4The die-cutting machine also includes a vision inspection component 5, which is fixedly installed above the upper die base 3 and stationary relative to the frame 1. It is used to collect images of positioning marks on the strip to be die-cut. Specifically, the vision inspection component 5 includes at least one CCD industrial camera 52 and a supplementary light 53 that provides illumination for it. The CCD industrial camera 52 is fixedly connected to the frame 1 or the fixed part of the stamping drive mechanism 4 by a rigid bracket 51, and its lens is set vertically downward.

[0026] like Figure 1 and Figure 2 As shown, the die-cutting machine also includes a light-transmitting die-cutting assembly 6, which includes an upper die 61 fixedly mounted on the bottom of the upper die base 3. The upper die 61 has at least one imaging hole 62 extending through its thickness direction. The upper die base 3 has a light-transmitting hole 31 corresponding to the position of the imaging hole 62, which is adapted to the light path of the vision inspection assembly 5. The lens of the CCD industrial camera 52 is vertically downward aligned with the light-transmitting hole 31. The imaging hole 62 and the light-transmitting hole 31 are coaxially arranged in the vertical direction, and the aperture of the imaging hole 62 is larger than the field of view of the CCD industrial camera 52 to ensure that the camera can completely capture the positioning mark image on the strip. In addition, a transparent protective lens 63 is embedded in the light-transmitting hole 31 to protect the vision inspection assembly 5 from external dust or foreign objects.

[0027] like Figure 1 and Figure 3 As shown, the die-cutting machine also includes a correction actuator 7, which is mounted on the lower die base 2 and is used to carry and drive the die-cut strip to make micro-adjustments in the X-axis and Y-axis directions in the horizontal plane. In this embodiment, the correction actuator 7 includes a drive box 71 fixed on the lower die base 2. A servo motor 72 is fixedly mounted on one end of the drive box 71. The output shaft of the servo motor 72 passes through the inner cavity of the drive box 71 and a ball screw 73 is fixedly mounted thereon. A drive box 75 is threaded onto the outer wall of the ball screw 73. A limiting slide bar 74, parallel to and of the same length as the ball screw 73, is fixedly mounted between the two sides of the inner cavity of the drive box 71. The drive box 75 is slidably connected to the limiting slide bar 74. This achieves guidance in the X-axis direction. A servo motor 76 is fixedly installed at one end of the drive box 2 75. The output shaft of the servo motor 76 passes through the inner cavity of the drive box 2 75 and a ball screw 77 is fixedly installed thereon. A correction plate 79 is threaded on the outer wall of the ball screw 77. A limiting slide rod 78, parallel to and of the same length as the ball screw 77, is fixedly installed between the two sides of the inner cavity of the drive box 2 75. The correction plate 79 and the limiting slide rod 78 are slidably connected to each other, thereby achieving guidance in the Y-axis direction. Both the drive box 1 71 and the drive box 2 75 are hollow structures. The ball screw 1 73 and the ball screw 2 77 are rotatably connected to the drive box 1 71 and the drive box 2 75 respectively through bearings to ensure the smoothness of the transmission.

[0028] like Figure 1 and Figure 5 As shown, the stamping drive mechanism 4 includes a hydraulic cylinder 41 fixedly installed on the top of the frame 1. The output end of the hydraulic cylinder 41 is fixedly connected to the top of the upper die holder 3. In order to achieve precise guidance, the stamping drive mechanism 4 also includes several guide rods 42 fixedly installed on the top of the lower die holder 2. The upper die holder 3 is slidably connected to these guide rods 42 under the drive of the hydraulic cylinder 41 and makes reciprocating linear motion in the vertical direction.

[0029] Continue to refer to Figure 1 The die-cutting machine also includes a vision controller 8 and a human-machine interface 9. The vision controller 8 is electrically connected to the vision inspection component 5 and the correction actuator 7, respectively. It is used to receive image information collected by the vision inspection component 5, analyze and calculate the deviation value between the positioning mark on the die-cutting strip and the preset reference position, and control the action of the correction actuator 7 according to the deviation value. The human-machine interface 9 is electrically connected to the vision controller 8 and is used to display the positioning mark image, allow the operator to set the reference position, and manually control the action of the correction actuator 7.

[0030] In a preferred embodiment, in order to achieve multi-point positioning of the strip, the vision inspection component 5 includes two CCD industrial cameras 52 arranged at intervals along the conveying direction of the strip, each corresponding to a positioning mark on the strip to be die-cut.

[0031] During the stamping process, the vision controller 8 controls the vision inspection component 5 to acquire images when the upper die holder 3 rises to its highest point and the upper die 61 is completely separated from the material strip within one stamping cycle, so as to avoid the image clarity being affected by mechanical vibration.

[0032] like Figure 2 and Figure 6 As shown, to prevent the strip from sticking to the upper die 61 after stamping, auxiliary demolding modules 64 are provided on both sides of the upper die 61. The auxiliary demolding module 64 includes a retraction box 641. A spring 642 is fixedly installed in the inner cavity of the retraction box 641. A limiting slide plate 643 is fixedly installed at the bottom end of the spring 642. The limiting slide plate 643 is slidably connected to the inner cavity of the retraction box 641. A pushing block 644 is fixedly installed at its bottom. The bottom end of the pushing block 644 extends through the bottom of the retraction box 641 and extends below the bottom surface of the upper die 61. When the upper die base 3 descends to stamp, the pushing block 644 is compressed by the reaction force of the strip, causing the limiting slide plate 643 to slide upward in the retraction box 641. When the upper die base 3 rises, the spring 642 returns to its original position, pushing the limiting slide plate 643 and the pushing block 644 downward, thereby pushing off the strip that may stick to the upper die 61 and achieving auxiliary demolding.

[0033] The working principle of this CCD positioning and correction die-cutting machine will be explained in detail below.

[0034] like Figure 1-6 As shown, firstly, the reference position of the positioning mark on the die-cutting strip is set through the human-machine interface 9. During operation, the stamping drive mechanism 4 drives the upper die base 3 to rise to its highest point. At this time, the upper die 61 is completely detached from the strip. The CCD industrial camera 52 of the vision inspection component 5 captures the image of the positioning mark on the strip below through the light-transmitting hole 31 of the upper die base 3 and the imaging hole 62 of the upper die 61. The captured image information is sent to the vision controller 8. The vision controller 8 processes the image and calculates the deviation values ​​of the actual position of the current positioning mark from the preset reference position in the X and Y axes. Subsequently, the vision controller 8 sends... The correction actuator 7 issues a control command, and the servo motor 72 and servo motor 76 act according to the command, driving the correction plate 79 to make precise micro-adjustments in the X and Y axes through the ball screw 73 and ball screw 77 respectively, until the positioning mark on the strip coincides with the reference position. After the correction is completed, the stamping drive mechanism 4 drives the upper die holder 3 to descend, and the upper die 61 cooperates with the lower die holder 2 to complete the die cutting and stamping of the strip. After the stamping is completed, the upper die holder 3 rises again, and the push block 644 of the auxiliary demolding module 64 pushes the strip away from the upper die 61 under the action of the spring 642, completing one work cycle.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A CCD positioning and correction die-cutting machine, comprising a frame (1), a lower die base (2) mounted on the frame (1), an upper die base (3) vertically disposed above the lower die base (2), and a stamping drive mechanism (4) for driving the upper die base (3) to rise and fall, characterized in that: It also includes: a vision inspection component (5), which is fixedly installed above the upper mold base (3) and is relatively stationary with respect to the frame (1), for collecting images of positioning marks on the material strip to be die-cut; The light-transmitting die-cutting assembly (6) includes an upper die (61) fixedly installed at the bottom of the upper die base (3). The upper die (61) has at least one shooting hole (62) that penetrates its thickness direction. The upper die base (3) has a light-transmitting hole (31) that is adapted to the light path of the visual inspection assembly (5) at the position corresponding to the shooting hole (62). The correction actuator (7) is installed on the lower die base (2) and is used to carry and drive the die-cut strip to make micro-adjustments in the X-axis and Y-axis directions in the horizontal plane; The vision controller (8) is electrically connected to the vision detection component (5) and the correction actuator (7) respectively, and is used to receive image information, analyze deviation values ​​and control the action of the correction actuator (7).

2. The CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The visual inspection component (5) includes at least one CCD industrial camera (52) and a supplementary light (53) that provides illumination for it. The CCD industrial camera (52) is fixedly connected to the frame (1) or the fixed part of the stamping drive mechanism (4) by a rigid bracket (51), and its lens is vertically downward aligned with the light-transmitting hole (31).

3. The CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The shooting hole (62) and the light-transmitting hole (31) are coaxially arranged in the vertical direction, and the aperture of the shooting hole (62) is larger than the field of view of the CCD industrial camera (52). A transparent protective lens (63) is embedded in the light-transmitting hole (31).

4. The CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The correction actuator (7) includes a drive box one (71) fixed on the lower mold base (2). A servo motor one (72) is fixedly installed at one end of the drive box one (71). Its output shaft passes through the inner cavity of the drive box one (71) and is fitted with a ball screw one (73). A drive box two (75) is threaded onto the outer wall of the ball screw one (73). A limit slide rod one (74) is fixedly installed between the two sides of the inner cavity of the drive box one (71). The drive box two (75) 75) is slidably connected to the limiting slide bar 1 (74). One end of the drive box 2 (75) is fixedly installed with a servo motor 2 (76), whose output shaft passes through the inner cavity of the drive box 2 (75) and is installed with a ball screw 2 (77). The outer wall of the ball screw 2 (77) is threaded with a correction plate (79). The two sides of the inner cavity of the drive box 2 (75) are fixedly installed with a limiting slide bar 2 (78). The correction plate (79) is slidably connected with the limiting slide bar 2 (78).

5. A CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The stamping drive mechanism (4) includes a hydraulic cylinder (41) fixedly installed on the top of the frame (1), whose output end is fixedly connected to the top of the upper die base (3). The stamping drive mechanism (4) also includes several guide rods (42) fixedly installed on the top of the lower die base (2). The upper die base (3) is slidably connected to the guide rods (42).

6. A CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The vision controller (8) controls the vision inspection component (5) to acquire images when the upper die holder (3) rises to the highest point and the upper die (61) is completely separated from the strip during a stamping work cycle.

7. A CCD positioning and correction die-cutting machine according to claim 1, characterized in that: It also includes a human-machine interface (9) electrically connected to the vision controller (8) for displaying positioning mark images, setting reference positions, and manually controlling the action of the correction actuator (7).

8. A CCD positioning and correction die-cutting machine according to claim 1, characterized in that: The vision inspection component (5) includes two CCD industrial cameras (52) arranged at intervals along the conveying direction of the material strip, which correspond to two positioning marks on the material strip to be die-cut.

9. A CCD positioning and correction die-cutting machine according to claim 1, characterized in that: Both sides of the upper die (61) are provided with auxiliary demolding modules (64). The auxiliary demolding module (64) includes a retraction box (641), in which a spring (642) is fixedly installed. A limiting slide plate (643) is fixedly installed at the bottom of the spring (642). The limiting slide plate (643) is slidably connected to the inner cavity of the retraction box (641). A push block (644) is fixedly installed at the bottom of the push block (644). The bottom end of the push block (644) extends through to the bottom of the retraction box (641) and extends to the bottom surface of the upper die (61).

10. A CCD positioning and correction die-cutting machine according to claim 4, characterized in that: Both drive box one (71) and drive box two (75) are hollow structures. The ball screw one (73) and ball screw two (77) are rotatably connected to drive box one (71) and drive box two (75) respectively through bearings.

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