Bullet shell appearance detection equipment

Abstract

The invention discloses bullet shell appearance detection equipment, and relates to the field of automatic detection. The invention discloses bullet shell appearance detection equipment which comprises an automatic feeding module, a detection module and a discharging module, the automatic feeding module is used for achieving automatic conveying and direction regulation of bullet shells. The detection module is used for performing all-directional appearance defect detection and size detection on the bullet shell; the discharging module is used for outputting qualified products and unqualified products after detection in a classified mode. The method has the advantages that the detection rate is higher, the omission ratio is 0, the over-detection rate is smaller than 3%, and the qualification rate is larger than or equal to 99%; the layout is more reasonable, the maintenance convenience is higher, and the distance between all the structures and the edge of the rack is smaller than or equal to 500 mm; and the efficiency is higher, and the productivity per minute can reach 100 PPM.

Description

Technical Field

[0001] This invention belongs to the field of automated inspection technology, specifically, it relates to a bullet casing appearance inspection equipment. Background Technology

[0002] Existing bullet inspection equipment has certain technical defects: due to the special shape and structure of the bullet casing, the application of visual inspection and imaging technology is greatly increased, resulting in technical bottlenecks in the detection of subtle defects on specific curved surfaces. Therefore, there are still shortcomings such as low detection rate of many inspection items and lack of detection functions, which are somewhat inadequate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automated detection that can overcome or at least partially solve the above problems.

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is: a bullet casing appearance inspection device, comprising:

[0005] Automatic feeding module, detection module and unloading module;

[0006] The automatic feeding module is used to realize the automatic conveying and orientation of bullet casings;

[0007] The detection module is used to perform all-round appearance defect detection and size detection on the bullet casing.

[0008] The feeding module is used to classify and output qualified and unqualified products after inspection.

[0009] Furthermore, the automatic feeding module includes a feeding and tilting hopper, a product step elevator, a product orientation adjustment feeding robot, an orderly feeding buffer conveyor, a transfer feeding robot, and a high-speed switching product detection platform.

[0010] Furthermore, the material loading and turning hopper has a storage capacity of ≥1000 pieces and can automatically identify and adjust the placement direction of bullet casings.

[0011] Furthermore, the transfer and loading robot is a one-grab-six-type structure, used to simultaneously grab bullet casings on the orderly loading buffer conveyor and transfer them to the high-speed switching product testing platform.

[0012] Furthermore, the inspection module includes a first appearance inspection station, a second appearance inspection station, an inner hole appearance inspection station, a third appearance inspection station, a fourth appearance inspection station, a first product size inspection station, a second product size inspection station, a product tip appearance inspection station, and a product bottom appearance inspection station.

[0013] Furthermore, the detection module achieves a pixel accuracy of 0.02mm for size detection and 0.01mm for appearance defect detection, with a pass rate of ≥99%, a false negative rate of 0, and a pass rate of ≤3%.

[0014] Furthermore, the high-speed switching product testing platform in the testing module is driven by a single servo motor and works in conjunction with a double cam mechanism to achieve up-down and back-and-forth movement, thereby completing the transfer of products between various testing stations.

[0015] Furthermore, the product's outer surface appearance inspection in the detection module adopts a bowl-shaped light source combined with a horizontal coaxial lighting method.

[0016] Furthermore, the inner hole appearance inspection station is used to detect defects such as blackening, pitting, and pressed-in metal in the inner hole of the bullet casing, and the product tip appearance inspection station is used to detect tip-related defects such as large tips, small tips, through tips, and protruding tips.

[0017] Furthermore, the feeding module includes a feeding and pushing mechanism, a product transfer conveyor belt, two NG rejection mechanisms on both sides, and an OK product output bin, which can realize the separate classification and rejection of ten NG types; the distance between all structures of this equipment and the edge of the frame is ≤500mm, and the production capacity per minute can reach 100PPM.

[0018] To achieve the above objectives, the present invention provides the following technical solution: a bullet casing appearance inspection equipment, comprising three main modules: an automatic feeding module, an inspection module, and an unloading module;

[0019] The process implementation steps are as follows:

[0020] 1. The automatic feeding module consists of a feeding and tilting hopper, a product step elevator, a product orientation adjustment feeding robot, an orderly feeding buffer conveyor, a transfer feeding robot (one grabber for six) and a high-speed switching product detection platform. The push plate feeding mechanism has a large capacity of ≥1000 pieces in the hopper, and automatically detects and adjusts the product orientation.

[0021] 2. The automatic inspection module consists of four inspection stations: No. 1 for appearance inspection, No. 2 for appearance inspection, No. 3 for appearance inspection, No. 4 for appearance inspection, No. 1 for product size inspection, No. 2 for product size inspection, No. 1 for product tip appearance inspection, and No. 1 for product bottom appearance inspection. It achieves comprehensive product inspection requirements, with a size inspection pixel accuracy of 0.02mm, an appearance defect detection pixel accuracy of 0.01mm, an inspection pass rate of ≥99%, zero missed inspections, and ≤3% over-inspection.

[0022] 3. The unloading module consists of an unloading and pushing mechanism, a product transfer conveyor belt, NG rejection on both sides, and OK product output falling into the material box, which can realize the separate classification and rejection of ten NG types. Attached Figure Description

[0023] In the attached diagram:

[0024] Figure 1 This is a three-dimensional structural diagram of a bullet casing appearance inspection device proposed in this invention. Figure 1 ;

[0025] Figure 2 This is a top view schematic diagram of a bullet casing appearance inspection device proposed in this invention;

[0026] Figure 3 This invention provides a bullet casing appearance inspection device. Figure 2 A schematic diagram of the structure of part A;

[0027] Figure 4 This is a schematic diagram of the automatic feeding module in a bullet casing appearance inspection equipment proposed in this invention;

[0028] Figure 5 This is a schematic diagram of the automatic feeding module and the detection module in the bullet casing appearance inspection equipment proposed in this invention;

[0029] Figure 6 This invention provides a bullet casing appearance inspection device. Figure 5 A structural diagram of section B;

[0030] Figure 7 This is a three-dimensional structural diagram of a bullet casing appearance inspection device proposed in this invention. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the unloading module in a bullet casing appearance inspection equipment proposed in this invention.

[0032] In the diagram: 1. Feeding and tilting hopper; 2. Product step-type elevator; 3. Product orientation adjustment feeding robot; 4. Orderly feeding buffer conveyor mechanism; 5. Transfer feeding robot; 6. High-speed switching product inspection platform; 7. No. 1 appearance inspection station; 8. No. 2 appearance inspection station; 9. Inner hole appearance inspection station; 10. No. 3 appearance inspection station; 11. No. 4 appearance inspection station; 12. No. 1 product size inspection station; 13. No. 2 product size inspection station; 14. Product tip appearance inspection station; 15. Product bottom appearance inspection station; 16. Unloading and pushing mechanism; 17. Product transfer conveyor belt; 18. OK product output box; 19. NG rejection mechanism on both sides. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] Example: Refer to Figure 1 , Figure 2 A bullet casing appearance inspection device, comprising:

[0035] Automatic feeding module, detection module and unloading module;

[0036] The automatic feeding module is used to realize the automatic conveying and orientation of bullet casings;

[0037] The inspection module is used to perform all-round appearance defect inspection and dimensional inspection on bullet casings;

[0038] The unloading module is used to classify and output qualified and unqualified products after inspection.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the automatic feeding module includes a feeding and tilting hopper 1, a product step elevator 2, a product orientation adjustment feeding robot 3, an orderly feeding buffer conveyor 4, a transfer feeding robot 5, and a high-speed switching product detection platform 6.

[0040] The feeding and tilting hopper 1 can automatically identify the orientation of the bullet casings and adjust accordingly.

[0041] The transfer and loading robot 5 has a one-grab-six-type structure, used to simultaneously grab bullet casings on the orderly loading buffer conveyor mechanism 4 and transfer them to the high-speed switching product inspection platform 6.

[0042] like Figure 5 , Figure 6 As shown, the inspection module includes a first appearance inspection station 7, a second appearance inspection station 8, an inner hole appearance inspection station 9, a third appearance inspection station 10, a fourth appearance inspection station 11, a first product size inspection station 12, a second product size inspection station 13, a product tip appearance inspection station 14, and a product bottom appearance inspection station 15.

[0043] The detection module has a pixel accuracy of 0.02mm for size detection and 0.01mm for appearance defect detection.

[0044] The high-speed switching product testing platform 6 in the testing module is driven by a single servo motor and works in conjunction with a double cam mechanism to achieve up-down and back-and-forth movement, so as to complete the transfer of products between various testing stations.

[0045] The product's outer surface appearance inspection in the inspection module uses a bowl-shaped light source combined with a horizontal coaxial lighting method.

[0046] The inner hole appearance inspection station 9 is used to inspect for defects such as blackening, pitting, and pressed metal in the inner hole of the bullet casing. The product tip appearance inspection station 14 is used to inspect for defects such as large tips, small tips, through tips, and protruding tips.

[0047] like Figure 7 , Figure 8 As shown, the unloading module includes an unloading and pushing mechanism 16, a product transfer conveyor belt 17, two NG rejection mechanisms 19 on both sides, and an OK product output box 18, which can realize the separate classification and rejection of ten NG types.

[0048] I. Overall Equipment Composition

[0049] This ammunition casing appearance inspection equipment consists of three core modules: an automatic feeding module, an inspection module, and an unloading module. These modules work together to complete the entire process of ammunition casing inspection, from automatic feeding and all-around inspection to classified unloading. All structures are ≤500mm from the edge of the frame, with a rational layout and convenient maintenance. It boasts a production capacity of up to 100 PPM per minute, meeting the high-quality, high-efficiency production and inspection needs of the military industry.

[0050] II. Detailed Structure and Functions of Each Module

[0051] (a) Automatic feeding module

[0052] The automatic feeding module includes a feeding and tilting hopper 1, a product step elevator 2, a product orientation adjustment feeding robot 3, an orderly feeding buffer conveyor 4, a transfer feeding robot 5, and a high-speed switching product detection platform 6. All components work together to achieve large-capacity storage, orderly conveying, and orientation alignment of bullet casings.

[0053] The feeding and tilting hopper 1 is a large-capacity hopper with a storage capacity of ≥1000 pieces, which can meet the feeding requirements of batch testing. After the bullet casings are manually transported to the tilting hopper, the hopper tilts and quantitatively introduces the internal material into the product step elevator 2. The product step elevator 2 is responsible for lifting the bullet casings one by one to the designated position so that the product orientation adjustment feeding robot 3 can perform orientation detection. The product orientation adjustment feeding robot 3 can automatically identify the placement direction of the bullet casings and automatically adjust products with inconsistent orientations based on the identification results, ensuring that all products are transferred to the orderly feeding buffer conveyor 4 for temporary buffering in a unified direction. The transfer feeding robot 5 adopts a one-grab-six-type structure, which can simultaneously grab six bullet casings on the orderly feeding buffer conveyor 4 and accurately transfer them to the high-speed switching product testing platform 6, laying the foundation for subsequent efficient testing.

[0054] (II) Detection Module

[0055] The inspection module is the core module for realizing all-round inspection of bullet casings. It includes the first appearance inspection station 7, the second appearance inspection station 8, the inner hole appearance inspection station 9, the third appearance inspection station 10, the fourth appearance inspection station 11, the first product size inspection station 12, the second product size inspection station 13, the product tip appearance inspection station 14, and the product bottom appearance inspection station 15, which can comprehensively cover the needs of appearance defect inspection and size inspection of bullet casings.

[0056] The high-speed product switching inspection platform 6 is driven by a single servo motor and uses a dual-cam mechanism to achieve up-down and back-and-forth movement, enabling it to move products transferred by the transfer and loading robot 5 one by one to each inspection station. At locations requiring circumferential inspection, a servo linkage mechanism drives the product rotation mechanism 9 to achieve uniform circumferential rotation, ensuring no blind spots in the inspection. The product's outer surface appearance inspection uses a bowl-shaped light source combined with a coaxial horizontal lighting method, effectively reducing the impact of curved surface reflections during image imaging, improving product image quality, and thus ensuring the detection rate and stability of the inspection.

[0057] The specific inspection contents of each inspection station are as follows: Inner hole appearance inspection station 9 is used to inspect defects such as blackening, pitting, and pressed metal in the inner hole of the bullet casing; Product tip appearance inspection station 14 is used to inspect defects related to the tip, such as large tip, small tip, through tip, and protruding tip; Product bottom appearance inspection station 15 is used to inspect related appearance defects at the bottom; Stations 1 to 4 are used in conjunction to inspect the outer surface of the bullet casing for appearance defects that should not exceed the specimen size, such as rust, exposed steel (copper layer peeling), line marks, dents, cuts, dust inclusions, oil stains, water stains, unflared openings, large breaks at the mouth, arc-shaped defects, and D-tip cracks; Product size inspection station 12 and Product size inspection station 13 are used to inspect the length and other dimensional parameters of the bullet casing.

[0058] The detection accuracy and performance indicators of this detection module are as follows: the pixel accuracy for size detection reaches 0.02mm, the pixel accuracy for appearance defect detection reaches 0.01mm, the pass rate is ≥99%, the missed detection rate is 0%, and the over-detection rate is ≤3%.

[0059] (III) Material feeding module

[0060] The unloading module includes an unloading and pushing mechanism 16, a product transfer conveyor belt 17, two NG rejection mechanisms 19 on both sides, and an OK product output box 18, which mainly realizes the classification and output of products after the inspection is completed.

[0061] The feeding and pushing mechanism 16 pushes the bullet casings after inspection from the high-speed switching product inspection platform 6 to the product transfer conveyor belt 17. During the conveying process on the product transfer conveyor belt 17, the NG rejection mechanisms 19 on both sides classify and reject ten different NG types according to the defect type information fed back by the inspection module, and blow the corresponding unqualified products into the corresponding material box. The qualified products continue to be conveyed with the conveyor belt and finally fall into the OK product output box 18 to complete the collection.

[0062] III. Process Implementation Steps

[0063] The feeding process is as follows: manual laborers transport bullet casings to the automatic feeding module's feeding and tilting hopper 1. The hopper tilts and quantitatively feeds the material into the product step elevator 2. The elevator lifts the bullet casings one by one to the designated position. The product orientation adjustment feeding robot 3 judges the product orientation and automatically adjusts it. Then, the product is placed on the orderly feeding buffer conveyor 4 for buffering. The transfer feeding robot 5 grabs the products on the buffer conveyor in a one-grab-six manner and transfers them to the high-speed switching product detection platform 6.

[0064] Inspection process: Driven by a single servo motor and a double cam mechanism, the high-speed switching product inspection platform 6 transfers products one by one to each inspection station. Images are acquired by using a bowl-shaped light source in conjunction with a horizontal coaxial lighting method. Each inspection station completes appearance defect inspection and size inspection respectively. Products that need to be rotated during the inspection process are rotated at a uniform speed through a servo linkage mechanism.

[0065] Material feeding process: The feeding and pushing mechanism 16 pushes the inspected products to the product transfer conveyor belt 17. The NG rejection mechanism 19 on both sides sorts and rejects unqualified products. Qualified products are transported to the OK product output box 18 to complete the entire inspection process.

[0066] The advantages of this device are as follows:

[0067] (1) Higher detection rate, 0% false negative rate, <3% over-test, and ≥99% pass rate.

[0068] (2) The layout is more reasonable and the maintenance is more convenient. The distance between all structures and the edge of the rack is ≤500mm.

[0069] (3) It is more efficient, with a production capacity of up to 100PPM per minute.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A bullet casing appearance inspection device, characterized in that, include: Automatic feeding module, detection module and unloading module; The automatic feeding module is used to realize the automatic conveying and orientation of bullet casings; The detection module is used to perform all-round appearance defect detection and size detection on the bullet casing. The feeding module is used to classify and output qualified and unqualified products after inspection.

2. The bullet casing appearance inspection equipment according to claim 1, characterized in that, The automatic feeding module includes a feeding and tilting hopper (1), a product step elevator (2), a product orientation adjustment feeding robot (3), an orderly feeding buffer conveyor (4), a transfer feeding robot (5), and a high-speed switching product detection platform (6).

3. The bullet casing appearance inspection equipment according to claim 2, characterized in that, The feeding and tilting hopper (1) can automatically identify the placement direction of the bullet casing and make adjustments.

4. The bullet casing appearance inspection equipment according to claim 3, characterized in that, The transfer loading robot (5) has a one-grab-six-type structure and is used to simultaneously grab bullet casings on the orderly loading buffer conveyor mechanism (4) and transfer them to the high-speed switching product testing platform (6).

5. The bullet casing appearance inspection equipment according to claim 3, characterized in that, The inspection module includes a first appearance inspection station (7), a second appearance inspection station (8), an inner hole appearance inspection station (9), a third appearance inspection station (10), a fourth appearance inspection station (11), a first product size inspection station (12), a second product size inspection station (13), a product tip appearance inspection station (14), and a product bottom appearance inspection station (15).

6. The bullet casing appearance inspection equipment according to claim 2, characterized in that, The detection module has a size detection pixel accuracy of 0.02mm and an appearance defect detection pixel accuracy of 0.01mm.

7. The bullet casing appearance inspection equipment according to claim 2, characterized in that, The high-speed switching product testing platform (6) in the testing module is driven by a single servo motor and works in conjunction with a double cam mechanism to achieve up-down and back-and-forth movement, so as to complete the transfer of products between various testing stations.

8. The bullet casing appearance inspection equipment according to claim 2, characterized in that, The detection module uses a bowl-shaped light source combined with a horizontal coaxial lighting method for inspecting the appearance of the product's outer surface.

9. The bullet casing appearance inspection equipment according to claim 5, characterized in that, The inner hole appearance inspection station (9) is used to detect defects such as blackening, pitting, and pressed metal in the inner hole of the bullet casing. The product tip appearance inspection station (14) is used to detect defects such as large tip, small tip, through tip, and protruding tip.

10. The bullet casing appearance inspection equipment according to claim 2, characterized in that, The feeding module includes a feeding and pushing mechanism (16), a product transfer conveyor belt (17), two NG rejection mechanisms (19) on both sides, and an OK product output box (18), which can realize the separate classification and rejection of ten NG types.

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