Numerical control bending machine for aluminum alloy sheet metal parts

Abstract

The invention discloses a numerical control bending machine for aluminum alloy sheet metal parts, and relates to the technical field of intelligent manufacturing equipment. Comprising a case, a sliding block, a clamp, a lower die, a rear stop finger, an adjusting driving frame and a notch finishing and protecting device, a detection mechanism is in stable contact with the groove edge of a V-shaped groove through the light folding structural design of a self-adaptive detection piece, and subsequent accurate touch acquisition of the abrasion state of the groove edge is facilitated. By means of a force sensing link composed of the rotating block, the bent shaft, the stress spring and the piezoelectric crystal, height changes caused by groove edge abrasion can be converted into electric signal changes, and real-time quantitative detection of the abrasion degree is achieved. The self-adaptive detection piece is continuously attached to the groove wall in the moving process, the scraper on the self-adaptive detection piece synchronously and mechanically scrapes attached stains, the synergistic cleaning effect is achieved through blowing and scraping, automatic, accurate and efficient cleaning and maintenance of the V-shaped groove are completed under the condition that manual intervention is not needed, the equipment cleaning quality is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing equipment technology, specifically a CNC bending machine for aluminum alloy sheet metal parts. Background Technology

[0002] Bending machines are key pieces of equipment used for forming and processing sheet metal. By applying controllable force to the sheet metal, they shape it at a specific angle along a predetermined bending line. They are fundamental manufacturing equipment in industries such as sheet metal manufacturing, equipment manufacturing, transportation, power cabinets, and appliance housings. With the development of intelligent manufacturing technology, modern bending machines have gradually evolved from traditional single forming equipment into intelligent processing platforms with process planning, data interaction, and quality monitoring capabilities.

[0003] During long-term operation, the lower die of existing bending machines is prone to wear due to repeated contact and friction with the sheet metal. If this wear is not detected and maintained in time, it can scratch the sheet metal being processed subsequently. In addition, residual oil, dust, and other impurities on the sheet metal surface are easily pressed into the V-groove of the lower die during bending, gradually forming an adhesion layer. This can also cause scratches or localized tearing on the sheet metal surface, thereby reducing the quality of the finished product after bending. Summary of the Invention

[0004] The purpose of this invention is to provide a CNC bending machine for aluminum alloy sheet metal parts to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CNC bending machine for aluminum alloy sheet metal parts, comprising a machine housing, a sliding block slidably mounted on the machine housing, a plurality of clamps mounted on the bottom end of the sliding block, an upper die mounted on the clamps, a lower die mounted on the machine housing, a rear stop finger mounted on the machine housing, an adjustment drive frame mounted on the machine housing, and a slot protection device mounted on the adjustment drive frame. The slot protection device includes a protection housing, which is mounted on an adjustment drive frame. A connection terminal is installed at the bottom of the protection housing, and a second rotating shaft is installed on the connection terminal. Adaptive detection elements are symmetrically and rotatably installed on the second rotating shaft, and an air outlet terminal is installed on the protection housing.

[0006] The machine housing contains a control system that can control the entire bending machine.

[0007] During operation, the operator first pushes one end of the sheet metal part against the rear stop finger to determine the bending reference position. Then, the control system drives the sliding block to move downwards along the column guide mechanism, causing the clamp and upper die below it to descend synchronously. As the V-grooves on the upper and lower dies gradually engage and approach each other, the upper die applies an increasing pressing force to the sheet metal part, causing it to complete the bending process along the predetermined bending line.

[0008] Furthermore, the groove protection device also includes a first rotating shaft, which is rotatably installed inside the protection housing. A speed-increasing element is rotatably installed on the first rotating shaft, and the speed-increasing element meshes with the adjusting drive frame for transmission. A drive shaft is rotatably installed inside the protection housing, with a cleaning fan installed at one end of the drive shaft and a bevel gear installed at the other end of the drive shaft. The bevel gear meshes with the speed-increasing element for transmission.

[0009] The maintenance modes are divided into cleaning maintenance and wear maintenance. When it is necessary to clean and maintain the V-groove of the lower mold, the control system activates the electric telescopic rod. The output shaft of the electric telescopic rod drives the support to descend. The support drives the groove protection device to descend through the lead screw and slide bar. The protection housing drives the adaptive detection component to descend through the connecting terminal.

[0010] In the initial position, the two symmetrically arranged adaptive detection components remain horizontal. As the groove alignment device continues to descend, the front ends of the adaptive detection components rest against the groove edges on both sides of the V-shaped groove. During the further descent of the connecting terminal, the adaptive detection components begin to deflect at their rotational connection with the connecting terminal, gradually folding inward from a horizontal position to form a V-shape. When the connecting terminal descends to the bottom of the groove, the two adaptive detection components are completely in contact with the groove wall, forming a V-shape with the same angle as the V-shaped groove. The scraper mounted on them also accurately adheres to the groove wall, entering the cleaning operation state.

[0011] Then, the control system activates the drive motor, which drives the output shaft to rotate the lead screw. The lead screw, through its threads, causes the entire protective housing to slide on the slide bar. Simultaneously, the entire protective housing moves the speed-increasing component, and the rack drives the speed-increasing component to rotate through several gear teeth. The speed-increasing component drives the bevel gear to rotate through its conical teeth. Because the diameter of the first disc on the speed-increasing component is larger than that of the second disc, a transmission amplification effect is created. The speed-increasing component amplifies the rotational speed of the gear teeth, and through the conical teeth, it drives the bevel gear to obtain a higher rotational speed. The bevel gear drives the cleaning fan to rotate at high speed through the drive shaft. The cleaning fan drives the airflow inside the entire protective housing to be ejected rapidly from the air outlet terminal. The V-shaped jet nozzle on the air outlet terminal shapes the airflow into a flow pattern that conforms to the V-shaped groove, allowing the airflow to accurately sweep the walls of the V-shaped groove. Meanwhile, the entire housing drives the adaptive detection component to move through the connecting terminals. The scraper on the adaptive detection component slides close to the groove wall, and the groove edge on the scraper scrapes off the stains adhering to the V-groove. The roller edge on the scraper then scrapes the rotating roller to keep it clean. At the same time, the stains scraped off the rotating roller slide down the upper surface of the scraper, and the blowing airflow blows away the dust and scraped stains in the V-groove, thus completing the automatic cleaning and maintenance of the V-groove.

[0012] Furthermore, the adaptive detection component includes a rotating block and a wear detector. The rotating block is rotatably mounted on a second rotating shaft, a rotating rod is mounted on the rotating block, a rotating roller is rotatably mounted on the rotating rod, the wear detector is mounted on a connecting terminal, one end of the wear detector is connected to the rotating block, and a scraper is mounted on the rotating block.

[0013] Furthermore, the wear detector includes a housing, which is mounted on a connection terminal. A piezoelectric crystal is installed inside the housing, and a force plate is mounted on the piezoelectric crystal. A bent shaft is slidably mounted on the housing, with one end of the bent shaft connected to a rotating block. A force spring is installed between the bent shaft and the force plate.

[0014] When wear maintenance is required on the sides of the V-groove, the control system drives the electric telescopic rod in the same sequence as the cleaning maintenance, causing the support and groove edge protection device to descend. The connecting terminal then drives the adaptive detection component downwards. The adaptive detection component is first supported and positioned at the groove edge, then deflected under the downward pressure of the connecting terminal, gradually folding from a horizontal state into a V-shape. The difference is that in the wear maintenance mode, the deflection angle only needs to form a slight V-shape; it does not need to continue pressing down to a position completely against the groove wall, ensuring that the rollers of the adaptive detection component make full contact with the V-groove edge.

[0015] In wear maintenance mode, the control system also drives the slotted protection device to move along the slide bar direction via a lead screw. When the adaptive detection component folds inward, the rotating block on it drives the bent shaft to slide inside the housing, simultaneously compressing the force spring. After the force spring is compressed, the elastic force is transmitted to the piezoelectric crystal through the force plate, causing the piezoelectric crystal to generate an electrical signal proportional to the compressive strength.

[0016] As the groove alignment device continues to slide, the adaptive detection component sequentially slides over different positions in the V-shaped groove. When the adaptive detection component moves to a groove section with wear, the deflection angle of the adaptive detection component decreases due to the reduced groove wall height. The corresponding deflection angle of the rotating block also decreases synchronously, resulting in a reduction in the amount of slippage of the bent shaft within the housing. Consequently, the compression of the force spring decreases, the pressure transmitted to the piezoelectric crystal weakens, and the strength of the electrical signal output by the piezoelectric crystal decreases accordingly.

[0017] The control system monitors the changes in the electrical signal of the piezoelectric crystal in real time and determines the degree of wear of the V-groove based on the decrease in signal strength. When the wear exceeds a set threshold and the attenuation of the electrical signal exceeds a preset range, the control system automatically issues a maintenance or replacement prompt, and the lower mold is determined to be unusable. This achieves automatic detection and maintenance determination of the wear degree of the lower mold's V-groove.

[0018] Furthermore, the speed-increasing component is provided with a first disk and a second disk, the diameter of the first disk is larger than that of the second disk, the second disk is provided with a number of gear teeth, and the speed-increasing component is driven by meshing with the adjusting drive frame through the gear teeth. The first disk is provided with a number of conical teeth, and the speed-increasing component is driven by meshing with bevel gears through the conical teeth.

[0019] Furthermore, the adjustment drive frame includes two adjustment cylinders, which are symmetrically mounted on the chassis. An angle motor is mounted on the output shaft of the adjustment cylinder, an electric telescopic rod is mounted on the output shaft of the angle motor, a support is mounted on the output shaft of the electric telescopic rod, a lead screw is rotatably mounted between the supports, a slide rod is mounted between the supports, a rack is mounted at the bottom of the slide rod, the rack meshes with a speed-increasing element through several gear teeth, the lead screw is threaded, the lead screw is threaded to the protective housing, the protective housing is slidably connected to the slide rod, a drive motor is mounted on the support, and the output shaft of the drive motor is connected to the lead screw.

[0020] The output shaft of the angle motor can drive the electric telescopic rod to deflect. In the initial state, the electric telescopic rod is in a horizontal state, and the entire adjustment drive frame and the slot protection device on it are placed horizontally on one side of the lower mold. When the lower mold needs to be maintained, the control system starts the angle motor, and the output shaft of the angle motor drives the electric telescopic rod to rotate, so that the electric telescopic rod rotates to a vertical state. The entire adjustment drive frame and the slot protection device are simultaneously in a vertical state and located above the lower mold. Subsequently, the control system activates the adjusting cylinder, and the output shaft of the adjusting cylinder drives the adjusting drive frame and the groove maintenance device to move horizontally via the electric telescopic rod until the connecting terminal on the groove maintenance device is aligned with the center of the lower mold V-groove, thus completing the position adjustment before maintenance.

[0021] Furthermore, the scraper is provided with a grooved blade and a roller blade, the tip of which is in contact with the rotating roller.

[0022] Furthermore, symmetrical inclined grooves are provided on the air outlet terminal, and the two inclined grooves form a V-shaped air jet port.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. The electric telescopic rod is driven by an angle motor to switch between horizontal and vertical positions, so that the adjustment drive frame and the slot protection device can automatically rotate to the top of the lower mold during operation and be stored horizontally to the side when not in operation, without occupying bending space.

[0024] 2. Through the deformable structure of the adaptive detection component, the cleaning mechanism can automatically fit into the V-shaped groove wall during the descent process, realizing the groove self-alignment and tight fit with the groove wall, improving the adaptability and reliability of the cleaning operation.

[0025] 3. Relying on the multi-stage transmission amplification of rack, speed increaser and bevel gear, the cleaning fan achieves high-speed rotation and powerful directional airflow output. Combined with the V-shaped jet nozzle that matches the trough shape, it can efficiently blow clean the trough wall.

[0026] 4. The slightly folded structure design of the adaptive detection component ensures stable contact between the detection mechanism and the edge of the V-groove, facilitating accurate tactile acquisition of the wear condition of the groove edge. Utilizing a force sensing link composed of a rotating block, bent shaft, force spring, and piezoelectric crystal, the height change caused by groove edge wear can be converted into an electrical signal change, enabling real-time quantitative detection of the wear degree.

[0027] 5. The adaptive detection component continuously adheres to the groove wall during movement, and the scraper on it simultaneously mechanically removes the attached dirt, so that blowing and scraping form a synergistic cleaning effect. It can complete the automatic, precise and efficient cleaning and maintenance of the V-groove without human intervention, improve the cleaning quality of the equipment and reduce maintenance costs. Attached Figure Description

[0028] Figure 1 This is a perspective view of the bending machine of the present invention; Figure 2 This is a perspective view of the bending machine of the present invention; Figure 3 This is a perspective view of the adjustment drive frame of the present invention; Figure 4 This is a perspective view of the groove protection device of the present invention; Figure 5 This is a perspective view of the speed-increasing component of the present invention; Figure 6 This is a perspective view of the air outlet terminal of the present invention; Figure 7 This is a perspective view of the connection terminal of the present invention; Figure 8 This is a perspective view of the adaptive detection component of the present invention; Figure 9 This is a perspective view of the wear detector of the present invention.

[0029] In the diagram: 1. Chassis; 2. Sliding block; 3. Fixture; 4. Lower mold; 5. Rear stop finger; 6. Adjustment drive frame; 7. Groove protection device; 61. Adjustment cylinder; 62. Angle motor; 63. Electric telescopic rod; 64. Support; 65. Drive motor; 66. Lead screw; 67. Slide rod; 68. Rack; 71. Protection housing; 72. First rotating shaft; 73. Speed ​​increaser; 74. Drive shaft; 75. Cleaning fan; 76. Air outlet terminal; 77. 78. Connecting terminal; 79. Adaptive detection component; 70. Bevel gear; 731. Gear tooth; 732. Conical tooth; 761. Inclined groove; 771. Second rotating shaft; 781. Rotating block; 782. Rotating rod; 783. Rotating roller; 784. Wear detector; 785. Scraper; 7851. Groove blade; 7852. Roller blade; 7841. Housing; 7842. Bent shaft; 7843. Force-bearing spring; 7844. Force-bearing plate; 7845. Piezoelectric crystal. Detailed Implementation

[0030] 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.

[0031] like Figures 1-9 As shown, the present invention provides a CNC bending machine for aluminum alloy sheet metal parts: including a machine housing 1, a sliding block 2 slidably installed on the machine housing 1, a plurality of clamps 3 installed at the bottom of the sliding block 2, an upper die installed on the clamps 3, a lower die 4 installed on the machine housing 1, a rear stop finger 5 installed on the machine housing 1, an adjustment drive frame 6 installed on the machine housing 1, and a slot protection device 7 installed on the adjustment drive frame 6; The slot straightening device 7 includes a straightening housing 71, which is mounted on the adjusting drive frame 6. A connecting terminal 77 is installed at the bottom of the straightening housing 71, and a second rotating shaft 771 is installed on the connecting terminal 77. Adaptive detection elements 78 are symmetrically and rotatably mounted on the second rotating shaft 771. An air outlet terminal 76 is installed on the straightening housing 71. A control system is installed inside the machine housing 1, which can control the entire bending machine.

[0032] During operation, the operator first pushes one end of the sheet metal part against the rear stop finger 5 to determine the bending reference position. Then, the control system drives the sliding block 2 to move downwards along the column guide mechanism. The sliding block 2 drives the clamp 3 and the upper die below it to descend synchronously. As the V-grooves on the upper and lower dies 4 gradually engage and approach each other, the upper die applies a gradually increasing pressing force to the sheet metal part, causing it to complete the bending process along the predetermined bending line.

[0033] The adjustment drive frame 6 includes two adjustment cylinders 61, which are symmetrically mounted on the housing 1. An angle motor 62 is mounted on the output shaft of the adjustment cylinder 61, an electric telescopic rod 63 is mounted on the output shaft of the angle motor 62, a support 64 is mounted on the output shaft of the electric telescopic rod 63, a lead screw 66 is rotatably mounted between the supports 64, and a slide rod 67 is mounted between the supports 64. A rack 68 is mounted at the bottom end of the slide rod 67, and the rack 68 is driven by a number of gear teeth 731 meshing with the speed increaser 73. The lead screw 66 is threaded and is threaded to the protective housing 71. The protective housing 71 is slidably connected to the slide rod 67. A drive motor 65 is mounted on the support 64, and the output shaft of the drive motor 65 is connected to the lead screw 66.

[0034] The groove cleaning and protection device 7 also includes a first rotating shaft 72, which is rotatably installed inside the cleaning and protection housing 71. A speed-increasing element 73 is rotatably installed on the first rotating shaft 72. The speed-increasing element 73 meshes with the adjusting drive frame 6 for transmission. A drive shaft 74 is rotatably installed inside the cleaning and protection housing 71. A cleaning fan 75 is installed at one end of the drive shaft 74, and a bevel gear 79 is installed at the other end of the drive shaft 74. The bevel gear 79 meshes with the speed-increasing element 73 for transmission.

[0035] The adaptive detection component 78 includes a rotating block 781 and a wear detector 784. The rotating block 781 is rotatably mounted on a second rotating shaft 771. A rotating rod 782 is mounted on the rotating block 781. A rotating roller 783 is rotatably mounted on the rotating rod 782. The wear detector 784 is mounted on a connecting terminal 77. One end of the wear detector 784 is connected to the rotating block 781. A scraper 785 is mounted on the rotating block 781.

[0036] The speed-increasing component 73 is provided with a first disk and a second disk. The diameter of the first disk is larger than that of the second disk. The second disk is provided with a number of gear teeth 731. The speed-increasing component 73 is driven by meshing with the adjusting drive frame 6 through the gear teeth 731. The first disk is provided with a number of conical teeth 732. The speed-increasing component 73 is driven by meshing with the bevel gear 79 through the conical teeth 732.

[0037] The scraper 785 is provided with a grooved blade 7851 and a roller blade 7852, the tip of which is in contact with the rotating roller 783.

[0038] The exhaust terminal 76 is symmetrically provided with inclined grooves 761, and the two inclined grooves 761 form a V-shaped air jet.

[0039] The wear detector 784 includes a housing 7841, which is mounted on a connection terminal 77. A piezoelectric crystal 7845 is installed inside the housing 7841, and a force plate 7844 is mounted on the piezoelectric crystal 7845. A bent shaft 7842 is slidably mounted on the housing 7841, one end of which is connected to a rotating block 781. A force spring 7843 is installed between the bent shaft 7842 and the force plate 7844.

[0040] The working principle of this invention: The output shaft of the angle motor 62 can drive the electric telescopic rod 63 to deflect. In the initial state, the electric telescopic rod 63 is in a horizontal state, and the entire adjustment drive frame 6 and the slot protection device 7 on it are horizontally placed on one side of the lower mold 4. When the lower mold 4 needs to be maintained, the control system starts the angle motor 62, and the output shaft of the angle motor 62 drives the electric telescopic rod 63 to rotate, so that the electric telescopic rod 63 rotates to a vertical state. The entire adjustment drive frame 6 and the slot protection device 7 are simultaneously in a vertical state and located above the lower mold 4. Subsequently, the control system activates the adjusting cylinder 61. The output shaft of the adjusting cylinder 61 drives the adjusting drive frame 6 and the slot maintenance device 7 to move horizontally via the electric telescopic rod 63 until the connecting terminal 77 on the slot maintenance device 7 is aligned with the center of the V-shaped slot of the lower mold 4, thus completing the position adjustment before maintenance.

[0041] The maintenance modes are divided into cleaning maintenance and wear maintenance. When the lower mold 4V groove needs to be cleaned and maintained, the control system activates the electric telescopic rod 63. The output shaft of the electric telescopic rod 63 drives the support 64 to descend. The support 64 drives the groove protection device 7 to descend through the lead screw 66 and the slide rod 67. The protection housing 71 drives the adaptive detection component 78 to descend through the connecting terminal 77.

[0042] In the initial position, the two symmetrically arranged adaptive detection elements 78 remain horizontal. As the groove alignment device 7 continues to descend, the front ends of the adaptive detection elements 78 rest against the groove edges on both sides of the V-shaped groove. During the further descent of the connecting terminal 77, the adaptive detection elements 78 begin to deflect at their rotatable connection with the connecting terminal 77, gradually folding inward from a horizontal position to form a V-shape. When the connecting terminal 77 descends to the bottom of the groove, the two adaptive detection elements 78 are completely in contact with the groove wall, forming a V-shape with the same angle as the V-shaped groove. The scraper 785 mounted on them also accurately adheres to the groove wall, entering the cleaning operation state.

[0043] Subsequently, the control system activates the drive motor 65, which drives the output shaft to rotate the lead screw 66. The lead screw 66, through its thread, causes the protective housing 71 to slide on the slide bar 67. The protective housing 71 simultaneously drives the speed increaser 73 to move. The rack 68 drives the speed increaser 73 to rotate through several gear teeth 731. The speed increaser 73 drives the bevel gear 79 to rotate through the conical teeth 732. Since the diameter of the first disc on the speed increaser 73 is larger than that of the second disc, a transmission amplification effect is formed. The speed increaser 73 amplifies the rotational speed of the gear teeth 731, and through the conical teeth 732, it drives the bevel gear 79 to obtain a higher rotational speed. The bevel gear 79 drives the cleaning fan 75 to rotate at high speed through the drive shaft 74. The cleaning fan 75 drives the airflow inside the protective housing 71 to be quickly ejected from the air outlet 76. The V-shaped jet nozzle on the air outlet 76 shapes the airflow into a flow state that fits the V-shaped groove, so that the airflow accurately sweeps the wall of the V-shaped groove.

[0044] Meanwhile, the housing 71 drives the adaptive detection element 78 to move via the connection terminal 77. The scraper 785 on the adaptive detection element 78 slides close to the groove wall. The groove blade 7851 on the scraper 785 scrapes off the dirt adhering to the V-groove. The roller blade 7852 on the scraper 785 scrapes the rotating roller 783 to keep the rotating roller 783 clean. At the same time, the dirt scraped off on the rotating roller 783 slides off the upper surface of the scraper 785. The blowing airflow blows away the dust and scraped dirt in the V-groove, thereby completing the automatic cleaning and maintenance of the V-groove.

[0045] When wear maintenance is required on the sides of the V-groove, the control system drives the electric telescopic rod 63 in the same sequence as the cleaning maintenance, causing the support 64 and the groove edge protection device 7 to descend. The connecting terminal 77 then drives the adaptive detection element 78 downwards. The adaptive detection element 78 is first positioned at the groove edge, and then deflects under the pressure of the connecting terminal 77, gradually folding from a horizontal state into a V-shape. The difference is that in the wear maintenance mode, the deflection angle only needs to form a slight V-shape; it does not need to continue pressing down to a position completely in contact with the groove wall, ensuring that the roller 783 of the adaptive detection element 78 makes full contact with the V-groove edge.

[0046] In wear maintenance mode, the control system also drives the slotted end-protection device 7 to move along the slide bar 67 via the lead screw 66. When the adaptive detection element 78 folds inward, the rotating block 781 on it causes the bent shaft 7842 to slide within the housing 7841, simultaneously compressing the force spring 7843. After being compressed, the force spring 7843 transmits the elastic force to the piezoelectric crystal 7845 through the force plate 7844, causing the piezoelectric crystal 7845 to generate an electrical signal proportional to the compressive strength.

[0047] As the groove straightening device 7 continues to slide, the adaptive detection element 78 slides sequentially across different positions of the V-shaped groove. When the adaptive detection element 78 moves to a groove section with wear, the deflection angle of the adaptive detection element 78 decreases due to the reduced groove wall height. The corresponding deflection angle of the rotating block 781 also decreases synchronously, resulting in a reduction in the amount of sliding of the bent shaft 7842 within the housing 7841. Consequently, the compression of the force spring 7843 decreases, weakening the pressure transmitted to the piezoelectric crystal 7845, and consequently reducing the strength of the electrical signal output by the piezoelectric crystal 7845.

[0048] The control system monitors the changes in the electrical signal of the piezoelectric crystal 7845 in real time and determines the degree of wear of the V-groove based on the decrease in signal strength. When the wear exceeds a set threshold and the attenuation of the electrical signal exceeds a preset range, the control system automatically issues a maintenance or replacement prompt, and the lower mold 4 is determined to be unable to continue normal use. This achieves automatic detection and maintenance determination of the wear degree of the V-groove of the lower mold 4.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A CNC bending machine for aluminum alloy sheet metal parts, comprising a machine housing (1), wherein a sliding block (2) is slidably mounted on the machine housing (1), a plurality of clamps (3) are mounted on the bottom end of the sliding block (2), an upper die is mounted on the clamps (3), a lower die (4) is mounted on the machine housing (1), and a rear stop finger (5) is mounted on the machine housing (1), characterized in that: An adjustment drive frame (6) is installed on the chassis (1), and a slot protection device (7) is installed on the adjustment drive frame (6). The slot protection device (7) includes a protection housing (71), which is mounted on an adjustment drive frame (6). A connection terminal (77) is installed at the bottom of the protection housing (71), and a second rotating shaft (771) is installed on the connection terminal (77). An adaptive detection element (78) is symmetrically and rotatably installed on the second rotating shaft (771). An air outlet terminal (76) is installed on the protection housing (71).

2. The CNC bending machine for aluminum alloy sheet metal parts according to claim 1, characterized in that: The groove cleaning device (7) further includes a first rotating shaft (72), which is rotatably installed inside the cleaning housing (71). A speed-increasing element (73) is rotatably installed on the first rotating shaft (72). The speed-increasing element (73) meshes with the adjusting drive frame (6). A drive shaft (74) is rotatably installed inside the cleaning housing (71). A cleaning fan (75) is installed at one end of the drive shaft (74), and a bevel gear (79) is installed at the other end of the drive shaft (74). The bevel gear (79) meshes with the speed-increasing element (73).

3. The CNC bending machine for aluminum alloy sheet metal parts according to claim 1, characterized in that: The adaptive detection component (78) includes a rotating block (781) and a wear detector (784). The rotating block (781) is rotatably mounted on a second rotating shaft (771). A rotating rod (782) is mounted on the rotating block (781). A rotating roller (783) is rotatably mounted on the rotating rod (782). The wear detector (784) is mounted on a connecting terminal (77). One end of the wear detector (784) is connected to the rotating block (781). A scraper (785) is mounted on the rotating block (781).

4. A CNC bending machine for aluminum alloy sheet metal parts according to claim 3, characterized in that: The wear detector (784) includes a housing (7841) mounted on a connecting terminal (77). A piezoelectric crystal (7845) is installed inside the housing (7841). A force plate (7844) is mounted on the piezoelectric crystal (7845). A bent shaft (7842) is slidably mounted on the housing (7841). One end of the bent shaft (7842) is connected to a rotating block (781). A force spring (7843) is installed between the bent shaft (7842) and the force plate (7844).

5. A CNC bending machine for aluminum alloy sheet metal parts according to claim 2, characterized in that: The speed-increasing component (73) is provided with a first disk and a second disk respectively. The diameter of the first disk is larger than that of the second disk. The second disk is provided with a number of gear teeth (731). The speed-increasing component (73) is driven by meshing with the adjusting drive frame (6) through the gear teeth (731). The first disk is provided with a number of conical teeth (732). The speed-increasing component (73) is driven by meshing with the bevel gear (79) through the conical teeth (732).

6. A CNC bending machine for aluminum alloy sheet metal parts according to claim 5, characterized in that: The adjustment drive frame (6) includes two adjustment cylinders (61), which are symmetrically mounted on the housing (1). An angle motor (62) is mounted on the output shaft of each adjustment cylinder (61), an electric telescopic rod (63) is mounted on the output shaft of each angle motor (62), a support (64) is mounted on the output shaft of each electric telescopic rod (63), a lead screw (66) is rotatably mounted between the supports (64), and a sliding rod is mounted between the supports (64). (67) A rack (68) is installed at the bottom end of the slide rod (67). The rack (68) meshes with the speed increaser (73) through several gear teeth (731). The lead screw (66) is threaded. The lead screw (66) is threaded to the protective housing (71). The protective housing (71) is slidably connected to the slide rod (67). A drive motor (65) is installed on the support (64). The output shaft of the drive motor (65) is connected to the lead screw (66).

7. A CNC bending machine for aluminum alloy sheet metal parts according to claim 4, characterized in that: The scraper (785) is provided with a grooved blade (7851) and a roller blade (7852), the tip of which is in contact with the rotating roller (783).

8. A CNC bending machine for aluminum alloy sheet metal parts according to claim 1, characterized in that: The air outlet terminal (76) is symmetrically provided with inclined grooves (761), and the two inclined grooves (761) form a V-shaped air outlet.

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