Corrosion-resistant die steel and surface defect detection equipment thereof

Abstract

The invention relates to the technical field of die steel detection, in particular to corrosion-resistant die steel and surface defect detection equipment thereof.The corrosion-resistant die steel comprises a machine base, conveying assemblies are movably installed at the two ends of the top of the machine base, a detection bin is integrally formed in the middle section of the top of the machine base, and a partition plate is integrally formed in the detection bin; a baking cavity and a coating cavity are formed between the two side walls of the detection bin and the partition plate respectively. The defect position of the surface of the die steel is permeated through covering of a medium, the problem that the outer surface of the die steel cannot be completely covered is avoided, the medium on the surface of the die steel is scraped and extruded through a scraping ring, the permeation depth of the medium to the die steel is increased, and after the medium on the surface of the die steel is solidified, the surface of the die steel is solidified. The medium covering the surface of the die steel is scraped off through the cleaning wheel, meanwhile, the medium at the defect position of the surface of the die steel is reserved, the reserved medium marks the defect position, and the defects that manual detection is low in efficiency and poor in accuracy, and the detection result is greatly influenced by subjective factors are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of mold steel detection, in particular to a corrosion-resistant mold steel and surface defect detection equipment thereof. Background Art

[0002] Corrosion-resistant mold steel plays a vital role in industrial production, especially in the automotive, aviation, and precision instrument manufacturing industries. Due to its characteristics of working in harsh environments, the quality requirements for corrosion-resistant mold steel are extremely strict. Surface defect detection is one of the key links in ensuring the quality of mold steel, which directly affects the service life of the mold and the quality of the final product.

[0003] The traditional surface defect detection method is to detect through manual vision, but this method has the disadvantages of low efficiency, poor accuracy, and the detection results are greatly affected by subjective factors. With the advancement of technology, the existing detection device uses detection cameras for detection, but when the size of the mold steel changes, the position of the detection camera is changed to ensure that the detection camera is evenly distributed on the outer surface of the mold steel. However, the detection range of the detection camera is always the same, so that the position between two adjacent detection cameras cannot be detected, resulting in the detection camera being unable to completely cover the mold steel surface, resulting in the inability to effectively detect the mold steel. At the same time, after detection by the detection camera, the surface of the mold steel needs to be marked, but the detection camera can only determine whether there are defects on the mold steel surface, and cannot mark the mold steel, so that manual intervention is still required in the marking process, resulting in the disadvantages of low efficiency, poor accuracy, and the detection results are greatly affected by subjective factors. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a corrosion-resistant die steel and a surface defect detection device thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A surface defect detection device for corrosion-resistant mold steel comprises a machine base, with conveying assemblies movably mounted at both ends of the top of the machine base. A detection chamber is integrally formed in the middle section of the top of the machine base, and a partition is integrally formed inside the detection chamber. A baking chamber and a coating chamber are respectively provided between the two side walls of the detection chamber and the partition. A feed port is provided on the side wall of the coating chamber, and a discharge port is provided on the side wall of the baking chamber, and the discharge port extends through the machine base.

[0007] A covering assembly is movably installed inside the covering cavity, and the covering assembly includes a covering wheel, a scraping ring and a soft rubber plate. The covering wheel is rotatably installed inside the covering cavity, the scraping ring is slidably installed inside the covering cavity, a turntable is rotatably installed on the side wall of the scraping ring, and the soft rubber plate is rotatably installed between the turntable and the covering wheel;

[0008] A cleaning assembly is movably installed inside the baking chamber, and the cleaning assembly includes a cleaning wheel, a heating wire and an inclined plate. The cleaning wheel is rotatably installed inside the baking chamber, and the heating wire is fixedly installed inside the baking chamber and is located between the cleaning wheel and the partition. The inner wall of the cleaning wheel is provided with a plurality of evenly distributed chip collection grooves, and the inclined plate is slidably installed inside the chip collection groove.

[0009] In the above-mentioned corrosion-resistant mold steel surface defect detection equipment, the side wall of the covering wheel is provided with a plurality of evenly distributed through holes, a side plate is integrally formed between every two through holes, and the soft rubber plate and the through holes are alternately arranged.

[0010] In the above-mentioned corrosion-resistant die steel surface defect detection equipment, a plurality of evenly distributed discharge grooves are provided on the side of the cleaning wheel close to the discharge port, a chip discharge groove is provided between every two of the discharge grooves, and the chip discharge groove and the chip collection groove are connected to each other.

[0011] In the above-mentioned corrosion-resistant mold steel surface defect detection equipment, the side wall of the scraper ring is integrally formed with a sliding rod, the side wall of the sliding rod is integrally formed with a slip ring, the inner wall of the slip ring is provided with a semicircular convex tooth segment, and the bottom of the inclined plate is integrally formed with a convex rack, the convex rack is located outside the chip collecting groove and is engaged with the semicircular convex tooth segment.

[0012] In the above-mentioned corrosion-resistant mold steel surface defect detection equipment, the sliding rod passes through the partition, the inner wall of the cleaning wheel is provided with a bidirectional screw groove, the side wall of the slip ring is integrally formed with a sliding ball, and the sliding ball is slidably installed inside the bidirectional screw groove, and a spring is provided between the bottom of the inclined plate and the chip collection groove.

[0013] In the above-mentioned corrosion-resistant mold steel surface defect detection equipment, the side walls of the coating wheel and the cleaning wheel are fixedly installed with gear ring 1 and gear ring 2 respectively, the bottom of the machine base is fixedly installed with motor 2 and motor 3, the output shafts of motor 2 and motor 3 are fixedly connected with gear 2 and gear 3 respectively, the gear ring 1 and gear 2 are meshed with each other, and the gear ring 2 and gear 3 are meshed with each other.

[0014] In the above-mentioned corrosion-resistant mold steel surface defect detection equipment, the conveying assembly includes conveying roller 1 and conveying roller 2, the conveying roller 1 is rotatably installed on the top of the machine base, and the bottom of the machine base is fixedly installed with motor 1, and the output shaft of motor 1 and conveying roller 2 are fixedly connected, and gear 1 is fixedly installed on the top of each of conveying roller 1 and conveying roller 2, and the two gears 1 are engaged with each other.

[0015] A corrosion-resistant die steel has the following chemical composition and weight percentage: C 0.4-0.6%, Al 0.7-2.2%, Si 0.6-1%, Ti 1-1.5%, Mn 0.5-0.7%, Mo 0.8-2.5%, Cr 8.5-10.5%, V 0.1-1.25%, Ni 2.75-5%, Nb 0.05-1.25%, S 0.01-0.03%, P 0.01-0.027%, and the balance is Fe and unavoidable impurities.

[0016] Compared with the existing technology, the advantages of the present invention are:

[0017] 1. The side plates are driven to rotate by the covering wheel, and the side plates transport the bottom medium to a higher place, so that the medium covers the mold steel surface at a higher place, and penetrates the position of the mold steel surface defects through the coverage of the medium, avoiding the phenomenon of failure to completely cover the mold steel surface.

[0018] 2. The cleaning wheel drives the scraper ring to slide back and forth, so that the scraper ring scrapes and squeezes the medium on the surface of the mold steel, increasing the penetration depth of the medium into the mold steel. At the same time, the reciprocating movement of the scraper ring shakes the medium to prevent the medium from settling.

[0019] 3. After the medium on the surface of the mold steel solidifies, the cleaning wheel drives the side wall of the discharge trough to scrape off the medium covering the outer surface of the mold steel, making the surface of the mold steel smooth and tidy. At the same time, the medium at the defective position on the surface of the mold steel is retained, so that the retained medium marks the defective position, avoiding the shortcomings of low efficiency and poor accuracy of manual inspection, and the inspection results being greatly affected by subjective factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Figure 4 It is a partial cross-sectional view of the overall structure of the present invention;

[0024] Figure 5 It is a structural cross-sectional view of the machine base in the present invention;

[0025] Figure 6 Schematic diagram of the structure of the coating wheel in the present invention;

[0026] Figure 7 Schematic diagram of the structure of the scraper ring in the present invention;

[0027] Figure 8 Schematic diagram of the structure of the cleaning wheel in the present invention;

[0028] Figure 9 This is a schematic diagram of the back structure of the cleaning wheel of the present invention;

[0029] Figure 10 Schematic diagram of the structure of the inclined plate in the present invention;

[0030] Figure 11 It is a structural schematic diagram of the conveying component in the present invention.

[0031] In the figure: 1. Machine base; 11. Inspection chamber; 111. Discharge port; 112. Feed port; 113. Baking chamber; 114. Coating chamber; 115. Partition; 121. Conveyor roller 1; 122. Conveyor roller 2; 123. Gear 1; 124. Motor 1; 21. Coating wheel; 211. Motor 2; 212. Gear ring 1; 213. Gear 2; 214. Through hole; 215. Side plate; 22. Scraper ring; 221. Heating wire; 222. Slide rod; 223. Slip ring; 224. Slide ball; 225. Semicircular convex tooth segment; 226. Turntable; 227. Soft rubber plate; 23. Cleaning wheel; 231. Motor three; 232. Gear ring two; 233. Gear three; 234. Discharge chute; 235. Chip discharge chute; 236. Bidirectional screw groove; 237. Chip collection groove; 31. Inclined plate; 311. Spring one; 312. Convex rack. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Example 1

[0035] Reference Figure 1 - Figure 11 As shown, a surface defect detection device for corrosion-resistant mold steel includes a base 1, with conveying assemblies movably mounted at both ends of the top of the base 1. An inspection chamber 11 is integrally formed in the middle section of the top of the base 1, and a partition 115 is integrally formed inside the inspection chamber 11. A baking chamber 113 and a coating chamber 114 are respectively provided between the two side walls of the inspection chamber 11 and the partition 115. A feeding port 112 is provided on the side wall of the coating chamber 114, and a discharging port 111 is provided on the side wall of the baking chamber 113. The discharging port 111 passes through the base 1.

[0036] A covering assembly is movably installed inside the covering cavity 114. The covering assembly includes a covering wheel 21, a scraper ring 22, and a soft rubber plate 227. The covering wheel 21 is rotatably installed inside the covering cavity 114. The scraper ring 22 is slidably installed inside the covering cavity 114. A rotating disk 226 is rotatably installed on the side wall of the scraper ring 22. The soft rubber plate 227 is rotatably installed between the rotating disk 226 and the covering wheel 21.

[0037] A cleaning assembly is movably installed inside the baking chamber 113, and the cleaning assembly includes a cleaning wheel 23, a heating wire 221 and an inclined plate 31. The cleaning wheel 23 is rotatably installed inside the baking chamber 113, and the heating wire 221 is fixedly installed inside the baking chamber 113 and is located between the cleaning wheel 23 and the partition 115. The inner wall of the cleaning wheel 23 is provided with a number of evenly distributed chip collecting grooves 237, and the inclined plate 31 is slidably installed inside the chip collecting groove 237.

[0038] Among them, the feed port 112 is connected to the external medium cavity, so that the medium enters the interior of the coating cavity 114 through the feed port 112. At the same time, the height of the medium in the coating cavity 114 is consistent with the height of the feed port 112, so that the interior of the coating cavity 114 contains air and medium. The medium is a colored paste-like fluid. The heating wire 221 increases the temperature inside the baking cavity 113 to solidify the medium.

[0039] like Figure 2 、 Figure 6 and Figure 8 As shown, the side walls of the coating wheel 21 and the cleaning wheel 23 are fixedly installed with gear ring 1 212 and gear ring 2 232 respectively, the bottom of the machine base 1 is fixedly installed with motor 211 and motor 3 231, the output shafts of motor 211 and motor 3 231 are fixedly connected with gear 2 213 and gear 3 233 respectively, gear ring 1 212 and gear 2 213 are meshed with each other, and gear ring 2 232 and gear 3 233 are meshed with each other.

[0040] like Figure 4 and Figure 6As shown, the side wall of the covering wheel 21 is provided with a plurality of evenly distributed through holes 214 , a side plate 215 is integrally formed between every two through holes 214 , and the soft rubber plates 227 and the through holes 214 are alternately arranged.

[0041] Among them, the working principle of the coating wheel 21 is: the motor 211 drives the coating wheel 21 to rotate, and the coating wheel 21 drives the side plate 215 to rotate, so that the side plate 215 stirs the medium inside the coating cavity 114 to prevent the medium from settling. At the same time, the side plate 215 transports the medium at the bottom to a high place, so that the medium covers the surface of the mold steel at a high place. At this time, the medium covers the defective position on the surface of the mold steel.

[0042] like Figure 3 、 Figure 4 and Figure 8 As shown, a plurality of evenly distributed discharge grooves 234 are provided on one side of the cleaning wheel 23 close to the discharge port 111 , a chip discharge groove 235 is provided between every two discharge grooves 234 , and the chip discharge groove 235 and the chip collecting groove 237 are communicated with each other.

[0043] Among them, the working principle of the cleaning wheel 23 is: the motor three 231 drives the cleaning wheel 23 to rotate, and the cleaning wheel 23 rotates on the outside of the mold steel, so that the side wall of the discharge trough 234 scrapes off the medium coated on the outer surface of the mold steel, making the outer surface of the mold steel smooth and tidy. At the same time, the position of the surface defect still retains the medium, and the retained medium marks the defect position. The medium scraped off the side wall of the discharge trough 234 is discharged to the inside of the discharge port 111 through the discharge trough 234. In the process of the cleaning wheel 23 rotating, the cleaning wheel 23 gets the inner wall to squeeze the outer surface of the mold steel, so that the medium on the surface of the mold steel falls into the inside of the chip collecting groove 237, and is discharged after being discharged to the inside of the chip discharge groove 235 through the inclined plate 31.

[0044] like Figure 7-10 As shown, the side wall of the scraper ring 22 is integrally formed with a slide rod 222, the side wall of the slide rod 222 is integrally formed with a slip ring 223, the inner wall of the slip ring 223 is provided with a semicircular convex tooth segment 225, and the bottom of the inclined plate 31 is integrally formed with a convex rack 312, which is located outside the chip collecting groove 237 and meshes with the semicircular convex tooth segment 225.

[0045] like Figure 3 、 Figure 4 and Figure 10 As shown, the slide rod 222 passes through the partition 115, a bidirectional screw groove 236 is provided on the inner wall of the cleaning wheel 23, a sliding ball 224 is integrally formed on the side wall of the slip ring 223, and the sliding ball 224 is slidably installed inside the bidirectional screw groove 236, and a spring 311 is provided between the bottom of the inclined plate 31 and the chip collecting groove 237.

[0046] Among them, the working principle of the scraper ring 22 is: when the cleaning wheel 23 drives the slip ring 223 to slide back and forth through the bidirectional screw groove 236 and the sliding ball 224, the slip ring 223 drives the scraper ring 22 to slide back and forth, so that the scraper ring 22 scrapes and squeezes the medium on the surface of the mold steel inside the coating cavity 114, so that the medium coated on the surface of the mold steel passing through the scraper ring 22 will not drip into the inside of the detection chamber 11, and the penetration depth of the medium into the mold steel is increased, and at the same time, the reciprocating movement of the scraper ring 22 shakes the medium between the coating wheel 21 and the scraper ring 22 to avoid medium precipitation.

[0047] Further references Figure 4 、 Figure 6 and Figure 7 To illustrate, the working principle of the soft rubber sheet 227 is: the coating wheel 21 drives the soft rubber sheet 227 to rotate around the mold steel, so that the soft rubber sheet 227 stirs the medium between the coating wheel 21 and the scraper ring 22 to further prevent the medium from settling.

[0048] Further reference Figure 3 、 Figure 7 and Figure 10 To explain, the working principle of the inclined plate 31 is: the cleaning wheel 23 drives the inclined plate 31 to rotate, the convex rack 312 and the semicircular convex tooth segment 225 engage with each other, and the inclined plate 31 vibrates, and the medium inside the chip collecting groove 237 is discharged by the vibration of the inclined plate 31. The semicircular convex tooth segment 225 is only in the lower half of the slip ring 223, so that when the inclined plate 31 follows the cleaning wheel 23 to move to the middle section, the inclined plate 31 discharges the medium inside the chip collecting groove 237 to the inside of the next chip collecting groove 237 to prevent the medium from falling onto the surface of the mold steel.

[0049] like Figure 2 、 Figure 3 and Figure 11 As shown, the conveying assembly includes a conveying roller 121 and a conveying roller 2 122. The conveying roller 121 is rotatably mounted on the top of the machine base 1. A motor 124 is fixedly mounted on the bottom of the machine base 1. The output shaft of the motor 124 is fixedly connected to the conveying roller 2 122. A gear 123 is fixedly mounted on the top of each of the conveying rollers 121 and 122, and the two gears 123 are engaged with each other.

[0050] The working principle and usage of the first embodiment are explained in detail below: the conveying assembly drives the mold steel through the inspection chamber 11, so that the mold steel enters the coating cavity 114 and the baking cavity 113 in turn, and the coating wheel 21 and the cleaning wheel 23 rotate. When the mold steel enters the coating cavity 114, the coating wheel 21 drives the side plate 215 to rotate, and the side plate 215 transports the bottom medium to a high place, so that the medium covers the mold steel surface at a high place, so that the medium penetrates the position of the surface defect of the mold steel, and the cleaning wheel 23 drives the scraping ring 22 to slide back and forth, so that the scraping ring 22 scrapes and squeezes the medium on the surface of the mold steel, thereby increasing the penetration depth of the medium into the mold steel. At the same time, the scraping ring 22 moves back and forth to shake the medium to prevent the medium from settling. After the mold steel enters the baking cavity 113, the heating wire 221 bakes the medium on the surface of the mold steel, so that the medium solidifies. The cleaning wheel 23 drives the scraping ring 22 to slide back and forth, so that the scraping ring 22 scrapes and squeezes the medium on the surface of the mold steel, thereby increasing the penetration depth of the medium into the mold steel. At the same time, the scraping ring 22 moves back and forth to shake the medium to prevent the medium from settling. 3 drives the side wall of the discharge trough 234 to scrape off the medium coated on the outer surface of the mold steel, making the mold steel surface smooth and tidy, while retaining the medium at the defective position of the mold steel surface, so that the retained medium marks the defective position, and the scraped medium falls into the inside of the discharge trough 234 and the chip collecting trough 237. The discharge trough 234 and the discharge port 111 are connected to each other, so that the medium inside the discharge trough 234 is discharged to the inside of the discharge port 111. The cleaning wheel 23 drives the inclined plate 31 to rotate, and the slip ring 223 drives the inclined plate 31 to vibrate through the semicircular convex tooth segment 225 and the convex rack 312, so that the medium inside the chip collecting trough 237 is discharged to the inside of the chip discharge trough 235 through the vibration of the inclined plate 31. The chip discharge trough 235 and the discharge port 111 are connected to each other, so that the medium inside the chip discharge trough 235 is discharged to the inside of the discharge port 111. The medium remaining on the mold steel surface passing through the detection chamber 11 is the defect on the mold steel surface.

[0051] Example 2

[0052] A corrosion-resistant mold steel has the following chemical composition and weight percentage: C 0.4-0.6%, Al 0.7-2.2%, Si 0.6-1%, Ti 1-1.5%, Mn 0.5-0.7%, Mo 0.8-2.5%, Cr 8.5-10.5%, V 0.1-1.25%, Ni 2.75-5%, Nb 0.05-1.25%, S 0.01-0.03%, P 0.01-0.027%, and the balance is Fe and unavoidable impurities.

[0053] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A corrosion-resistant die steel surface defect detection device, comprising a machine base (1), characterized in that: Conveying components are movably mounted at both ends of the top of the machine base (1); a detection chamber (11) is integrally formed in the middle section of the top of the machine base (1); a partition (115) is integrally formed inside the detection chamber (11); a baking chamber (113) and a coating chamber (114) are respectively provided between the two side walls of the detection chamber (11) and the partition (115); a feeding port (112) is provided on the side wall of the coating chamber (114); a discharging port (111) is provided on the side wall of the baking chamber (113); and the discharging port (111) passes through the machine base (1); A covering assembly is movably installed inside the covering cavity (114), and the covering assembly includes a covering wheel (21), a scraping ring (22) and a soft rubber plate (227). The covering wheel (21) is rotatably installed inside the covering cavity (114), and the scraping ring (22) is slidably installed inside the covering cavity (114). A rotating disk (226) is rotatably installed on the side wall of the scraping ring (22), and the soft rubber plate (227) is rotatably installed between the rotating disk (226) and the covering wheel (21). A cleaning assembly is movably installed inside the baking chamber (113), and the cleaning assembly includes a cleaning wheel (23), a heating wire (221) and an inclined plate (31). The cleaning wheel (23) is rotatably installed inside the baking chamber (113), and the heating wire (221) is fixedly installed inside the baking chamber (113) and is located between the cleaning wheel (23) and the partition (115). The inner wall of the cleaning wheel (23) is provided with a plurality of evenly distributed chip collecting grooves (237), and the inclined plate (31) is slidably installed inside the chip collecting groove (237).

2. The corrosion-resistant mold steel surface defect detection device according to claim 1, characterized in that: The side wall of the covering wheel (21) is provided with a plurality of evenly distributed through holes (214), a side plate (215) is integrally formed between every two through holes (214), and the soft rubber plates (227) and the through holes (214) are alternately arranged.

3. The surface defect detection equipment for corrosion-resistant mold steel according to claim 1, characterized in that: A plurality of evenly distributed discharge grooves (234) are provided on one side of the cleaning wheel (23) close to the discharge port (111), a chip discharge groove (235) is provided between every two of the discharge grooves (234), and the chip discharge grooves (235) and the chip collection groove (237) are communicated with each other.

4. The corrosion-resistant die steel surface defect detection device according to claim 1, characterized in that: The side wall of the scraper ring (22) is integrally formed with a slide rod (222), the side wall of the slide rod (222) is integrally formed with a slip ring (223), the inner wall of the slip ring (223) is provided with a semicircular convex tooth segment (225), and the bottom of the inclined plate (31) is integrally formed with a convex rack (312), the convex rack (312) is located outside the chip collecting groove (237) and meshes with the semicircular convex tooth segment (225).

5. The corrosion-resistant die steel surface defect detection device according to claim 4, characterized in that: The sliding rod (222) passes through the partition (115), the inner wall of the cleaning wheel (23) is provided with a bidirectional screw groove (236), the side wall of the sliding ring (223) is integrally formed with a sliding ball (224), and the sliding ball (224) is slidably installed inside the bidirectional screw groove (236), and a spring (311) is provided between the bottom of the inclined plate (31) and the chip collecting groove (237).

6. The corrosion-resistant die steel surface defect detection device according to claim 1, characterized in that: The side walls of the coating wheel (21) and the cleaning wheel (23) are fixedly mounted with a first gear ring (212) and a second gear ring (232), respectively; the bottom of the machine base (1) is fixedly mounted with a second motor (211) and a third motor (231); the output shafts of the second motor (211) and the third motor (231) are fixedly connected with a second gear (213) and a third gear (233), respectively; the first gear ring (212) and the second gear (213) are meshed with each other, and the second gear ring (232) and the third gear (233) are meshed with each other.

7. The corrosion-resistant die steel surface defect detection device according to claim 1, characterized in that: The conveying assembly comprises a conveying roller 1 (121) and a conveying roller 2 (122); the conveying roller 1 (121) is rotatably mounted on the top of the machine base (1); a motor 1 (124) is fixedly mounted on the bottom of the machine base (1); an output shaft of the motor 1 (124) and the conveying roller 2 (122) are fixedly connected; a gear 1 (123) is fixedly mounted on the top of each of the conveying roller 1 (121) and the conveying roller 2 (122); and the two gears 1 (123) are meshed with each other.

8. A corrosion-resistant die steel, characterized by: The mold steel has the following chemical composition and weight percentage: C0.4-0.6%, Al0.7-2.2%, Si0.6-1%, Ti1-1.5%, Mn0.5-0.7%, Mo0.8-2.5%, Cr8.5-10.5%, V0.1-1.25%, Ni2.75-5%, Nb0.05-1.25%, S0.01-0.03%, P0.01-0.027%, and the balance is Fe and unavoidable impurities.

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