Metal casting surface defect detection device

Abstract

The invention discloses a metal casting surface defect detection device, and relates to the technical field of metal casting surface defect detection, the metal casting surface defect detection device comprises an operation table, the lower end of the operation table is provided with an operation box, and the lower end of the operation box is fixedly provided with a plurality of groups of supporting legs. In the process of detecting the surface defects of the metal casting, through mutual cooperation of the moving assembly, the adjusting assembly, the control assembly and other components, rapid detection of the surface defects of the metal casting is completed through an image recognition method, in the detection process, through transmission, the shooting angle of the image collecting lens is adjusted in a self-adaptive mode, and the detection precision is improved. Through the adjusting effect, the included angle between the image collecting lens and the step slope surface of the metal casting is reduced, the phenomenon that when the step slope surface of the metal casting is shot, the color is too bright or shadows exist is avoided, the shooting effect is guaranteed, and the precision of metal casting surface defect detection is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal casting surface defect detection, in particular to a metal casting surface defect detection device. Background Art

[0002] Image recognition is a method for detecting surface defects of metal castings. During the detection process, the image of the metal casting surface is obtained using an image acquisition lens, and then compared with the built-in standard metal casting surface database based on image analysis technology. The surface feature differences are quantified through a specific algorithm, thereby inferring the results of the metal casting surface detection.

[0003] In the process of detecting surface defects of metal castings by image recognition method, due to the presence of steps at a certain angle on some workpieces, the image acquisition lens will produce an angle with the surface of the step position when shooting, causing some areas to have high light reflections, making the color brighter, while other areas may be in shadow, affecting the shooting effect and further reducing the accuracy of metal casting surface defect detection. For this reason, we propose a metal casting surface defect detection device. Summary of the invention

[0004] The object of the present invention is to provide a metal casting surface defect detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a metal casting surface defect detection device, comprising an operating table, an operating box is installed at the lower end of the operating table, a plurality of supporting legs are fixed at the lower end of the operating box, an L-shaped frame is fixed at the upper end of the operating table, an image acquisition lens for detecting surface defects of the inclined step on the workpiece is arranged between the L-shaped frame and the operating table, and further comprising:

[0006] A limiting component is arranged on the operating table for limiting the position of the workpiece to be inspected after placement, a lifting component is arranged between the L-shaped frame and the image acquisition lens for lifting and lowering the image acquisition lens, and a control component is arranged on the image acquisition lens for adaptively controlling the angle between the image acquisition lens and the workpiece during the detection process.

[0007] Preferably, the control component includes a lifting frame, which is located above the image acquisition lens, and a cylinder for lifting the lifting frame is arranged on the L-shaped frame, and a slider is connected to the lifting frame through a sliding component, and a connecting plate is arranged below the slider, and a telescopic component for assisting the telescopic connection is arranged between the slider and the connecting plate, and a rotating component for assisting the rotatable connection of the image acquisition lens is arranged between the connecting plate and the upper end of the image acquisition lens, and two groups of mounting blocks are symmetrically arranged on both sides of the image acquisition lens, and L-shaped positioning rods for positioning during the detection process are fixed on the two groups of mounting blocks, and an adjustment component for adjusting the spacing between the two groups of mounting blocks is arranged on the image acquisition lens.

[0008] Preferably, the sliding assembly comprises a mounting rod slidably connected to the sliding block, the mounting rod is fixed inside the lifting frame, and a mounting spring is sleeved on the outer side of the mounting rod.

[0009] Preferably, the telescopic assembly includes multiple groups of first sleeves fixed to the upper end of the connecting plate, the first sleeves are slidably connected to the first sliding rod, one end of the first sliding rod is fixed to the slider, and the outer side of each group of the first sleeves is provided with a connecting spring, and the two ends of the connecting spring are respectively connected to the slider and the connecting plate.

[0010] Preferably, the rotating assembly includes a mounting frame fixed to the lower end of the connecting plate, and a connecting block is rotatably connected to the mounting frame via a resetting assembly, and the connecting block is fixed to the upper end of the image acquisition lens.

[0011] Preferably, the adjustment component includes two groups of support frames fixed to one side of the image acquisition lens, the two groups of support frames are rotatably connected with double-headed threaded tubes, and the threads at both ends of the double-headed threaded tubes are arranged in opposite directions, and the two ends of the double-headed threaded tubes are threadedly engaged with threaded rods, one end of the two groups of threaded rods are respectively fixed to two groups of mounting blocks, and a guide component for guiding during the adjustment process is arranged between the support frame and the mounting block.

[0012] Preferably, a mounting sleeve is fixed on the double-headed threaded tube, and an anti-slip protrusion is provided on the mounting sleeve.

[0013] Preferably, the guide assembly includes two groups of second sleeves fixed on the support frame, the two groups of second sleeves are slidably connected with second sliding rods, and one end of the two groups of second sliding rods are respectively fixed to the two groups of mounting blocks.

[0014] Preferably, the reset assembly includes a reset shaft rotatably connected to the connecting block, the mounting frame is fixed on the reset shaft, a retaining ring is fixed on the reset shaft, a torsion spring is sleeved on the outer side of the reset shaft, and both ends of the torsion spring are respectively connected to the retaining ring and the mounting frame.

[0015] Preferably, the limit assembly includes a plurality of groups of T-slots opened on the upper surface of the operating table, the T-slots are slidably connected with T-blocks, the T-blocks are fixed with limit blocks for limiting one side of the workpiece, the limit blocks and the T-blocks are provided with threaded holes, and the threaded holes are threadedly connected with T-bolts.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the process of metal casting surface defect detection operation of the present invention, the moving component, the adjusting component and the control component cooperate with each other to complete the rapid detection of metal casting surface defects by image recognition method, and in the detection process, the shooting angle of the image acquisition lens is adaptively adjusted through transmission, and the angle between the image acquisition lens and the step slope surface of the metal casting is reduced through the adjustment effect, so as to avoid the color being too bright or the existence of shadow when shooting the step slope surface of the metal casting, thereby ensuring the shooting effect and further improving the accuracy of metal casting surface defect detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0020] Figure 3 It is a schematic diagram of the control component structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the regulating component of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the telescopic assembly and the rotating assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the sliding assembly of the present invention;

[0024] Figure 7 It is a schematic diagram of the state before detection of the present invention;

[0025] Figure 8 This is a diagram showing the state in which the end of a single set of L-shaped positioning rods abuts against the inclined surface of the workpiece step during the detection process of the present invention;

[0026] Fig. 9 This is a state diagram of the image acquisition lens after adaptive steering during the detection process of the present invention.

[0027] In the figure: 1, operating table; 2, operating box; 3, supporting leg; 4, L-shaped frame; 5, image acquisition lens; 601, T-slot; 602, T-block; 603, limit block; 604, threaded hole; 605, T-bolt; 701, lifting frame; 702, cylinder; 703, slider; 704, connecting plate; 705, mounting block; 706, L-shaped positioning rod; 801, mounting rod; 802, mounting spring; 901, first sleeve; 902, first slide rod; 903, connecting spring; 1001, mounting frame; 1002, connecting block; 1101, supporting frame; 1102, double-headed threaded pipe; 1103, threaded rod; 1104, mounting sleeve; 1201, second sleeve; 1202, second slide rod; 1301, reset shaft; 1302, retaining ring; 1303, torsion spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1-Figure 9 , a metal casting surface defect detection device shown in the figure includes an operating table 1, an operating box 2 is installed at the lower end of the operating table 1, a plurality of supporting legs 3 are fixed to the lower end of the operating box 2, an L-shaped frame 4 is fixed to the upper end of the operating table 1, and an image acquisition lens 5 for detecting surface defects of the inclined step on the workpiece is arranged between the L-shaped frame 4 and the operating table 1;

[0031] It should be noted here that: the image acquisition method surface defect detection is a common detection method, which mainly includes an image acquisition lens 5, a data processing module and a control system, wherein the image acquisition lens 5, a data processing module and a control system are mainly used as conventional technical means in the detection process, and are used as prior art in this application, and no further elaboration is made here;

[0032] Also includes:

[0033] A limiting component is arranged on the operating table 1 for limiting the position of the workpiece to be inspected after placement, a lifting component is arranged between the L-shaped frame 4 and the image acquisition lens 5 for lifting the image acquisition lens 5, and a control component is arranged on the image acquisition lens 5 for adaptively controlling the angle between the image acquisition lens 5 and the workpiece during the inspection process;

[0034] The control component includes a lifting frame 701, which is located above the image acquisition lens 5. A cylinder 702 for lifting the lifting frame 701 is provided on the L-shaped frame 4. A slider 703 is connected to the lifting frame 701 through a sliding component. A connecting plate 704 is provided below the slider 703. A telescopic component for assisting the telescopic connection is provided between the slider 703 and the connecting plate 704. A rotating component for assisting the rotatable connection of the image acquisition lens 5 is provided between the connecting plate 704 and the upper end of the image acquisition lens 5. Two groups of mounting blocks 705 are symmetrically provided on both sides of the image acquisition lens 5. L-shaped positioning rods 706 for positioning during the detection process are fixed on the two groups of mounting blocks 705. An adjusting component for adjusting the distance between the two groups of mounting blocks 705 is provided on the image acquisition lens 5.

[0035] It should be noted here that: during the process of metal casting surface defect detection, the moving component, the adjusting component and the control component cooperate with each other to complete the rapid detection of metal casting surface defects by image recognition method, and during the detection process, the shooting angle of the image acquisition lens 5 is adaptively adjusted through transmission. Through the adjustment effect, the angle between the image acquisition lens 5 and the step slope surface of the metal casting is reduced to avoid the color being too bright or the existence of shadows when shooting the step slope surface of the metal casting, thereby ensuring the shooting effect and further improving the accuracy of metal casting surface defect detection.

[0036] Preferably, the sliding assembly includes a mounting rod 801 slidably connected to the slider 703, the mounting rod 801 is fixed inside the lifting frame 701, and a mounting spring 802 is sleeved on the outer side of the mounting rod 801;

[0037] It should be noted here that the sliding and resetting of the slider 703 are facilitated by the mounting rod 801 and the mounting spring 802 .

[0038] Preferably, the telescopic assembly includes a plurality of groups of first sleeves 901 fixed to the upper end of the connecting plate 704, a first slide bar 902 is slidably connected to the first sleeve 901, one end of the first slide bar 902 is fixed to the slider 703, and a connecting spring 903 is sleeved on the outer side of each group of first sleeves 901, and both ends of the connecting spring 903 are respectively connected to the slider 703 and the connecting plate 704;

[0039] It should be noted here that: the first sleeve 901 and the first slide rod 902 facilitate the telescopic connection between the connecting plate 704 and the slider 703, and the connecting spring 903 facilitates the reset of the connecting plate 704 and the slider 703 after the contraction movement.

[0040] Preferably, the rotating assembly includes a mounting frame 1001 fixed to the lower end of the connecting plate 704, and a connecting block 1002 is rotatably connected to the mounting frame 1001 through a reset assembly, and the connecting block 1002 is fixed to the upper end of the image acquisition lens 5;

[0041] It should be noted here that: the mounting frame 1001 , the torque shaft and the connecting block 1002 facilitate the rotatable connection between the connecting plate 704 and the image acquisition lens 5 .

[0042] Preferably, the adjustment component includes two groups of support frames 1101 fixed to one side of the image acquisition lens 5, the two groups of support frames 1101 are rotatably connected with double-headed threaded tubes 1102, and the threads at both ends of the double-headed threaded tubes 1102 are arranged in opposite directions, the two ends of the double-headed threaded tubes 1102 are threadedly engaged with threaded rods 1103, one end of the two groups of threaded rods 1103 are respectively fixed to the two groups of mounting blocks 705, and a guide component for guiding during the adjustment process is arranged between the support frame 1101 and the mounting block 705; the guide component includes two groups of second sleeves 1201 fixed to the support frame 1101, the two groups of second sleeves 1201 are slidably connected with second slide bars 1202, and one end of the two groups of second slide bars 1202 are respectively fixed to the two groups of mounting blocks 705;

[0043] It should be noted here that: the double-headed threaded tube 1102 is rotated. Since the threads at both ends of the double-headed threaded tube 1102 are arranged in opposite directions, during the rotation of the double-headed threaded tube 1102, the two groups of threaded rods 1103 are respectively meshed with each other at the two ends of the double-headed threaded tube 1102 and the two groups of second sliding rods 1202 and the sliding guiding effect of the second sleeve 1201 are used to make the two groups of mounting blocks 705 move closer to or away from each other after being subjected to force. During the movement, the spacing between the L-shaped positioning rods 706 on the two groups of mounting blocks 705 is adjusted. By adjusting the spacing, it is convenient to perform adaptive rotation operation on the inclined surfaces of the steps on metal castings of different widths.

[0044] Preferably, a mounting sleeve 1104 is fixed on the double-ended threaded tube 1102, and an anti-slip protrusion is provided on the mounting sleeve 1104;

[0045] It should be noted here that the installation sleeve 1104 and the anti-skid protrusions on the installation sleeve 1104 facilitate the rotation operation of the double-headed threaded tube 1102.

[0046] Preferably, the reset assembly includes a reset shaft 1301 rotatably connected to the connection block 1002, the mounting frame 1001 is fixed to the reset shaft 1301, a retaining ring 1302 is fixed to the reset shaft 1301, a torsion spring 1303 is sleeved on the outer side of the reset shaft 1301, and both ends of the torsion spring 1303 are respectively connected to the retaining ring 1302 and the mounting frame 1001;

[0047] It should be noted here that: during the rotation process, the reset shaft 1301 is driven to rotate by the mounting frame 1001. During the rotation of the reset shaft 1301, the torsion spring 1303 is driven to deform and generate elastic force through the retaining ring 1302. The elastic force of the torsion spring 1303 facilitates the subsequent resetting of the reset shaft 1301 and the connecting block 1002.

[0048] Preferably, the limiting assembly includes a plurality of groups of T-slots 601 provided on the upper surface of the operating table 1, a T-block 602 is slidably connected to the T-slot 601, a limiting block 603 for limiting the position of one side of the workpiece is fixed to the T-block 602, a threaded hole 604 is provided on the limiting block 603 and the T-block 602, and a T-bolt 605 is threadedly connected to the threaded hole 604;

[0049] It should be noted here that: during the process of working on the surface defects of metal castings, the metal castings to be inspected are placed above the operating table 1. After placement, the T-blocks 602 on each group of T-slots 601 are pushed. During the pushing process, the limit blocks 603 on the multiple groups of T-blocks 602 are respectively abutted against the two sides of the placed metal castings. After the abutment is completed, the T-bolts 605 are rotated. During the rotation of the T-bolts 605, one end of the T-bolts 605 is abutted against the inner side of the T-slot 601. Through the abutment and extrusion effect, the limit blocks 603 on each group of T-blocks 602 are kept abutting against the two sides of the metal casting, so that the metal casting is limited and fixed above the operating table 1.

[0050] In this scheme: a metal casting surface defect detection device comprises the following steps:

[0051] During the process of detecting the surface defects of metal castings, the metal castings to be detected are placed on the top of the operating table 1. After the placement is completed, the T-blocks 602 on each group of T-slots 601 are pushed. During the pushing process, the limit blocks 603 on the multiple groups of T-blocks 602 are respectively abutted against the two sides of the placed metal castings. After the abutment is completed, the T-bolts 605 are rotated. During the rotation of the T-bolts 605, one end of the T-bolts 605 is abutted against the inner side of the T-slots 601. Through the abutment and extrusion effect, the limit blocks 603 on each group of T-blocks 602 are kept abutting against the two sides of the metal castings, so that the metal castings are limited and fixed above the operating table 1.

[0052] After the metal casting is limitedly installed, the inclined surface of the step on the metal casting is placed directly below the image acquisition lens 5, and the lifting frame 701 is driven to descend by the cylinder 702. During the descent of the lifting frame 701, the image acquisition lens 5 is driven to move downward by the connection of the sliding component, the telescopic component and the rotating component. After the image acquisition lens 5 is descended, the surface of the inclined surface of the step of the metal casting clamped and fixed on the operating table 1 is photographed by the image acquisition lens 5. After the shooting is completed, the image is transmitted and compared with the built-in standard metal casting surface database based on image analysis technology, and the surface feature difference is quantified by a specific algorithm, so as to infer the result of metal casting surface detection;

[0053] In the process of photographing the step slope surface of the metal casting through the image acquisition lens 5, as the image acquisition lens 5 descends, the lower end of one set of L-shaped positioning rods 706 abuts against the relatively high position of the step slope surface of the metal casting (see FIG. Figure 8 After the image acquisition lens 5 continues to descend, the image acquisition lens 5 is rotated by the sliding connection of the slider 703, the telescopic connection between the slider 703 and the connecting plate 704, and the rotatable connection of the rotating assembly to the image acquisition lens 5. During the rotation of the image acquisition lens 5, the end of another group of L-shaped positioning rods 706 on the image acquisition lens 5 is offset against the lower position of the stepped inclined surface of the metal casting (see FIG. Fig. 9 The shooting angle of the image acquisition lens 5 is adaptively adjusted, and the angle between the image acquisition lens 5 and the step slope surface of the metal casting is reduced through the adjustment, so as to avoid the color being too bright or the existence of shadows when shooting the step slope surface of the metal casting, thereby ensuring the shooting effect and further improving the accuracy of metal casting surface defect detection.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal casting surface defect detection device, comprising: An operating table (1), wherein an operating box (2) is installed at the lower end of the operating table (1), a plurality of groups of supporting legs (3) are fixed to the lower end of the operating box (2), an L-shaped frame (4) is fixed to the upper end of the operating table (1), and an image acquisition lens (5) for detecting surface defects of inclined steps on a workpiece is arranged between the L-shaped frame (4) and the operating table (1); It is characterized by further comprising: A limiting component is arranged on the operating table (1) for limiting the position of a workpiece to be inspected after placement; a lifting component is arranged between the L-shaped frame (4) and the image acquisition lens (5) for lifting the image acquisition lens (5); and a control component is arranged on the image acquisition lens (5) for adaptively controlling the angle between the image acquisition lens (5) and the workpiece during the inspection process.

2. A metal casting surface defect detection device according to claim 1, characterized in that: The control component comprises a lifting frame (701), wherein the lifting frame (701) is located above the image acquisition lens (5); a cylinder (702) for lifting the lifting frame (701) is arranged on the L-shaped frame (4); a slider (703) is connected to the lifting frame (701) via a sliding component; a connecting plate (704) is arranged below the slider (703); a telescopic component for assisting telescopic connection is arranged between the slider (703) and the connecting plate (704); a rotating component for assisting rotatable connection of the image acquisition lens (5) is arranged between the connecting plate (704) and the upper end of the image acquisition lens (5); two groups of mounting blocks (705) are symmetrically arranged on both sides of the image acquisition lens (5); L-shaped positioning rods (706) for positioning during detection are fixed on the two groups of mounting blocks (705); and an adjusting component for adjusting the spacing between the two groups of mounting blocks (705) is arranged on the image acquisition lens (5).

3. A metal casting surface defect detection device according to claim 2, characterized in that: The sliding assembly comprises a mounting rod (801) slidably connected to a slider (703), the mounting rod (801) being fixed inside the lifting frame (701), and a mounting spring (802) being sleeved on the outer side of the mounting rod (801).

4. A metal casting surface defect detection device according to claim 3, characterized in that: The telescopic assembly comprises a plurality of groups of first sleeves (901) fixed to the upper end of a connecting plate (704), a first sliding rod (902) being slidably connected to the first sleeves (901), one end of the first sliding rod (902) being fixed to a slider (703), a connecting spring (903) being sleeved on the outer side of each group of the first sleeves (901), and two ends of the connecting spring (903) being respectively connected to the slider (703) and the connecting plate (704).

5. A metal casting surface defect detection device according to claim 4, characterized in that: The rotating assembly comprises a mounting frame (1001) fixed to the lower end of the connecting plate (704); a connecting block (1002) is rotatably connected to the mounting frame (1001) via a resetting assembly; and the connecting block (1002) is fixed to the upper end of the image acquisition lens (5).

6. A metal casting surface defect detection device according to claim 5, characterized in that: The adjustment component comprises two groups of support frames (1101) fixed to one side of the image acquisition lens (5); the two groups of support frames (1101) are rotatably connected with double-headed threaded tubes (1102); the threads at both ends of the double-headed threaded tubes (1102) are arranged in opposite directions; the two ends of the double-headed threaded tubes (1102) are threadedly engaged with threaded rods (1103); one end of the two groups of threaded rods (1103) are respectively fixed to two groups of mounting blocks (705); and a guide component for guiding during the adjustment process is arranged between the support frames (1101) and the mounting blocks (705).

7. A metal casting surface defect detection device according to claim 6, characterized in that: A mounting sleeve (1104) is fixed on the double-ended threaded tube (1102), and an anti-slip protrusion is provided on the mounting sleeve (1104).

8. A metal casting surface defect detection device according to claim 6, characterized in that: The guide assembly comprises two groups of second sleeves (1201) fixed on the support frame (1101), the two groups of second sleeves (1201) are slidably connected with second sliding rods (1202), and one end of the two groups of second sliding rods (1202) are respectively fixed to the two groups of mounting blocks (705).

9. The metal casting surface defect detection device according to claim 5, characterized in that: The reset assembly comprises a reset shaft (1301) rotatably connected to a connecting block (1002); the mounting frame (1001) is fixed to the reset shaft (1301); a retaining ring (1302) is fixed to the reset shaft (1301); a torsion spring (1303) is sleeved on the outer side of the reset shaft (1301); and two ends of the torsion spring (1303) are respectively connected to the retaining ring (1302) and the mounting frame (1001).

10. The metal casting surface defect detection device according to claim 1, characterized in that: The limiting assembly comprises a plurality of groups of T-slots (601) formed on the upper surface of the operating table (1); a T-block (602) is slidably connected to the T-slots (601); a limiting block (603) for limiting the position of one side of a workpiece is fixed to the T-block (602); threaded holes (604) are formed on the limiting block (603) and the T-block (602); and a T-bolt (605) is threadedly connected to the threaded hole (604).

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