Finishing system and finishing process for steel with flaw detection surface defects

Abstract

The invention relates to a finishing system and a finishing process for flaw detection surface defect steel, the finishing system comprises a magnetic detection front feeding rack, a magnetic detection front input roller bed, a magnetic particle flaw detector, a magnetic detection rear output roller bed, a magnetic detection rear discharging rack, a transition roller bed and a transition rack which are connected in sequence, the magnetic detection front feeding rack is connected with the magnetic detection rear output roller bed, and the magnetic detection front feeding rack is connected with the magnetic detection rear discharging roller bed; the transition rack is connected with the qualified product discharging rack, the input roller way before magnetic detection serves as a manual grinding area, and rolling of steel is manually ground through the input roller way before magnetic detection. According to the invention, the labor intensity of workers is reduced, the grinding efficiency is improved, the dependence on a travelling crane is reduced, the operation efficiency is greatly improved, and the finishing capacity of the combined flaw detection line is released.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel production, more particularly, it relates to a finishing system and finishing process for steel with surface defects. BACKGROUND

[0002] Steel detection mainly refers to using non-destructive testing technology, especially ultrasonic flaw detection technology, to detect the internal and surface defects of metal bars to ensure that the material quality meets the industrial standards. At present, the steel with surface defects detected by the combined detection finishing line is lifted away from the combined detection line by the crane for grinding operation. When grinding on the offline grinding rack, the round steel cannot automatically rotate and relies on manual rotation to find defects. The manual labor intensity is high, the grinding efficiency is low, and after grinding, the defective material needs to be lifted to the combined detection finishing line by the crane for re-detection operation. The transfer of logistics needs the crane to complete, and the overall efficiency is low, which has great dependence on the crane. Therefore, the grinding of the steel with surface defects detected needs a lot of manpower and resources. In actual production, in order to ensure the operation of the same rolling batch, the combined detection line often needs to be stopped for waiting operation, which seriously affects the operation efficiency of the combined detection finishing line. With the continuous expansion of the market demand for detection and finishing materials, the production line equipment is in an overload state. It is necessary to optimize and innovate the existing finishing process of "offline grinding + combined detection re-detection" to release the finishing capacity of the combined detection line. SUMMARY

[0003] In view of the deficiencies in the prior art, the purpose of the present application is to provide a finishing system and finishing process for steel with surface defects detected, which reduces the manual labor intensity, improves the grinding efficiency, reduces the dependence on the crane, greatly improves the operation efficiency, and is beneficial to release the finishing capacity of the combined detection line.

[0004] The above technical purpose of the present application is realized by the following technical scheme: A finishing system for steel with surface defects detected, comprising a magnetic detection front feeding rack, a magnetic detection front input roller, a magnetic particle flaw detector, a magnetic detection rear output roller, a magnetic detection rear discharging rack, a transition roller and a transition rack connected in sequence, wherein the magnetic detection front feeding rack is connected with the ultrasonic detection rear output roller, the transition rack is connected with the qualified product discharging rack, the magnetic detection front input roller serves as a manual grinding area, and the rolling of the steel is manually ground by using the magnetic detection front input roller.

[0005] In one embodiment, the magnetic detection front feeding rack comprises a rack body, a feeding and stirring mechanism, a material blocking mechanism and a discharging and stirring mechanism arranged on the rack body.

[0006] In one of the embodiments, the finishing system further comprises a grinding and pushing device, which is arranged between the magnetic detection front input roller way and the magnetic particle flaw detector, and comprises a pushing arm, a lifting device and a horizontal moving device.

[0007] In one of the embodiments, an inclined pair of wheel roller way is arranged in the grinding and pushing device, which can drive the round steel to rotate automatically when the round steel has defects, and the inclined pair of wheel roller way can be reversed.

[0008] In one of the embodiments, the magnetic particle flaw detector is used to detect cracks and various tiny defects in any direction on the outer surface and near surface of the round steel, and the surface detection accuracy includes: the longitudinal defect detection depth is 0.1 mm, the ring defect detection depth is 0.1 mm, and the point defect detection depth is 0.1 mm, and there is no end detection blind area.

[0009] In one of the embodiments, the flaw detection speed of the magnetic particle flaw detector is 5-10 m / min, and the roller way conveying speed is ≤45 m / min.

[0010] A finishing process for detecting surface defects of steel is as follows: The round steel enters the loading rack before straightening, and then enters the straightening unit and the chamfering unit for straightening and chamfering, and then is detected by the magnetic flux leakage flaw detector and the ultrasonic flaw detector, and the qualified product is weighed and packaged along the output roller way after the ultrasonic detection and enters the qualified product unloading rack; The unqualified product is weighed and packaged along the output roller way after the ultrasonic detection and enters the magnetic detection front input roller way for manual grinding, and then enters the magnetic particle flaw detector for re-detection, and the qualified round steel after re-detection is weighed and packaged along the transition roller way and the transition rack and enters the qualified product unloading rack, and the unqualified product is output to the offline station through the output roller way after the magnetic detection.

[0011] In summary, the present application has the following advantages: The round steel can rotate automatically when the defects are ground, which reduces the labor intensity, improves the grinding efficiency, and does not need to use the crane to lift the surface defect material away from the combined flaw detection finishing line, and the surface defect material does not need to be lifted to the combined flaw detection line by the crane after manual grinding, which reduces the dependence on the crane, and the re-detection of the surface defect material is carried out on the magnetic particle flaw detector, which does not affect the flaw detection operation of the combined flaw detection finishing line, greatly improves the operation efficiency, releases the finishing capacity of the combined flaw detection line, and can be widely applied to the same type of production line of the excellent special steel. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a flow chart of the prior art process; Figure 2 is a flow chart of the finishing process of the present application; Figure 3 is a schematic diagram of the pre-magnetic exploration feeding rack; Figure 4 is another schematic diagram of the pre-magnetic exploration feeding rack; Figure 5 is a schematic diagram of the pre-magnetic exploration input roller table as a whole; Figure 6 is another schematic diagram of the pre-magnetic exploration input roller table; Figure 7 is a schematic diagram of the grinding and shoveling device as a whole; Figure 8 is a schematic diagram of the grinding and shoveling device; Figure 1 ; Figure 9 is a schematic diagram of the grinding and shoveling device; Figure 2 .

[0013] In the figure: 1, pre-magnetic exploration feeding rack, 11, rack body, 12, feeding and shoveling mechanism, 13, material blocking mechanism, 14, discharging and shoveling mechanism; 2, pre-magnetic exploration input roller table; 3, grinding and shoveling device, 31, shoveling arm, 32, lifting device, 33, horizontal moving device, 34, obliquely placed pair of roller table. DETAILED DESCRIPTION

[0014] The present application will be described in detail below in combination with the drawings and examples.

[0015] It is worth noting that the orientation words such as "up", "down" and the like involved in this paper are relative to the perspective of the drawings and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions.

[0016] As shown in Figures 2-9 , the present application proposes a finishing system for detecting surface defects of steel materials, which comprises a pre-magnetic exploration feeding rack 1, a pre-magnetic exploration input roller table 2, a magnetic particle detector, a post-magnetic exploration output roller table, a post-magnetic exploration discharging rack, a transition roller table and a transition rack connected in sequence, wherein the pre-magnetic exploration feeding rack 1 is connected with the post-exploration output roller table, the transition rack is connected with the qualified product discharging rack, the pre-magnetic exploration input roller table 2 serves as a manual grinding area, and manual grinding is performed on the tumbling of the steel materials by using the pre-magnetic exploration input roller table 2.

[0017] As shown in Figure 1As shown, the existing conventional finishing process is: the steel is lifted by a crane to the pre-straightening loading platform, and then the steel enters the straightening unit and chamfering unit in turn for straightening and chamfering, and then the steel enters the leakage magnetic flaw detector and the ultrasonic flaw detector through the pre-flaw detection conveyor roller. After the flaw detection is completed, the steel is output through the post-ultrasonic flaw detection output roller. At this time, the unqualified products enter the unqualified product unloading platform and are lifted by the crane to the grinding platform for manual grinding. After the grinding is completed, they are lifted again by the crane to the front chamfering unit for chamfering again and then flaw detection again; the qualified products directly enter the qualified product unloading platform and will be processed later.

[0018] It can be seen that the existing process relies entirely on the crane to handle defective products, which has low production efficiency and often causes the joint flaw detection line to stop and wait for operation.

[0019] like Figure 2 As shown, the finishing system of the present invention is applicable to the existing combined flaw detection line, forming a grinding flaw detection line for unqualified products parallel to the flaw detection process of qualified products. After the steel leaves the ultrasonic flaw detector, it is screened on the output roller after the ultrasonic detection. It is easy to understand that the structure of the loading platform 1 before magnetic detection is the same as that of the unloading platform for qualified products. Qualified products enter the subsequent unloading platform for qualified products, and unqualified products enter the loading platform 1 before magnetic detection. From then on, qualified products and unqualified products are transported along two paths, which greatly reduces the dependence of unqualified products on driving.

[0020] In some embodiments, the pre-magnetic detection loading platform 1 includes a platform body 11 and a loading and discharging mechanism 12, a blocking mechanism 13 and a unloading and discharging mechanism 14 arranged on the platform body 11. The function of the pre-magnetic detection loading platform 1 is to receive a single round steel bar that fails the surface flaw detection on the conveyor roller after the ultrasonic flaw detection, and transfer the single round steel bar to the pre-magnetic particle flaw detection roller. In the present invention, the pre-magnetic detection loading platform 1 is an existing conventional platform for transferring rods, such as Figures 3-4 As shown, the present invention does not limit the specific structure of the front loading stand 1 before magnetic detection.

[0021] The post-magnetic detection unloading stand and the transition stand of the present invention are similar in structure to the pre-magnetic detection loading stand 1 , and the present invention does not impose any limitation thereto.

[0022] In some embodiments, as Figures 7-9 As shown, the finishing system also includes a grinding and material-discharging device 3, which is arranged between the magnetic detection front input roller 2 and the magnetic particle inspection machine to facilitate manual grinding. The grinding and material-discharging device 3 includes a material-discharging arm 31, a lifting device 32, and a transverse device 33. The lifting device 32 and the transverse device 33 are both pneumatically driven.

[0023] In some embodiments, an inclined pair of rollers 34 is provided in the grinding and material removing device 3, which can drive the round steel to rotate automatically when grinding defects of the round steel, wherein the inclined pair of rollers 34 can rotate forward and reverse.

[0024] In some embodiments, the magnetic particle flaw detector is used to detect cracks and various micro-defects in any direction on the outer surface and near surface of round steel, wherein the surface detection accuracy includes: longitudinal defect detection depth of 0.1 mm, ring defect detection depth of 0.1 mm, and point defect detection depth of 0.1 mm, and no end detection blind area.

[0025] Further, the flaw detection speed of the magnetic particle flaw detector is 5-10 m / min, and the roller conveying speed is ≤45 m / min.

[0026] The magnetic particle flaw detector is a conventional flaw detection device, which includes a magnetizing device, a magnetizing transformer and a magnetizing power supply system, an automatic part conveying system, a magnetic suspension liquid spraying and recycling system, a darkroom and lighting system, and the like. The device adopts automatic, manual and point operation modes. When manual, single-step independent operation of each function can be performed; when automatic, the device automatically executes the internal program of PLC to realize the automation of a series of actions such as automatic detection of workpiece feeding, feeding, spraying, magnetization, manual observation and inspection, demagnetization, sorting, unloading and stopping.

[0027] The magnetic detection front input roller 2 of the present application is shown in Figures 5-6 The magnetic detection front input roller 2 of the present application is shown in

[0028] Based on the above finishing system, the present application further provides a finishing process for detecting surface defects of steel, as follows: The round steel enters the feeding rack before straightening, and then enters the straightening unit and the chamfering unit in sequence for straightening and chamfering, and then is subjected to flaw detection treatment by the magnetic flux leakage flaw detector and the ultrasonic flaw detector. The qualified product passes through the post-flaw detection output roller and enters the qualified product unloading rack for packaging and weighing treatment; The unqualified product passes through the post-flaw detection output roller and enters the magnetic detection front feeding rack 1, and then enters the magnetic detection front input roller 2 for manual grinding. After the manual grinding is completed, the round steel is subjected to re-detection by the magnetic particle flaw detector. The qualified product after re-detection passes through the magnetic detection rear output roller and enters the magnetic detection rear unloading rack, and then enters the qualified product unloading rack through the transition roller and the transition rack for subsequent packaging and weighing treatment. The unqualified product after re-detection is output to the offline station through the magnetic detection rear output roller.

[0029] The present invention adds a pre-magnetic detection loading platform 1, a pre-magnetic detection input roller 2, a magnetic particle inspection machine, a post-magnetic detection output roller, a post-magnetic detection unloading platform and other devices. For round steel with defects on the inspection surface, the newly added pre-magnetic detection loading platform 1 is transported to the pre-magnetic detection conveying roller via the online, and the surface defects are manually ground on the pre-magnetic detection input roller 2. After the defective material is ground, the defective material is magnetically inspected by the newly added magnetic particle inspection machine, and the head is aligned after the magnetic particle inspection. The qualified material of the magnetic particle inspection passes through the magnetic detection unloading platform, the transition roller, the transition platform, and is sent to the original post-super-inspection conveying roller for the same finishing process as the defect-free material of the combined inspection. The round steel that fails the magnetic particle inspection is output to the offline workstation via the post-magnetic detection output roller, and is transferred to the defect collection basket via the material shifting device. After the round steel reaches a certain number, it is transported by crane to the finishing-related process. The new finishing process of "online grinding + magnetic particle inspection and re-inspection" manually grinds surface defects on the input roller 2 before magnetic inspection. The input roller before magnetic inspection adopts an inclined wheel roller 34. The round steel can rotate automatically when the defects are ground, which reduces the labor intensity and improves the grinding efficiency. There is no need for a crane to lift the ground surface defective material away from the combined flaw detection and finishing line. After the defective material is manually ground, there is no need for a crane to lift it to the combined flaw detection line, which reduces the dependence on the crane. At the same time, the ground defective material is re-inspected on the magnetic particle inspection machine, which will not affect the flaw detection operation of the combined flaw detection and finishing line, greatly improves the operation efficiency, and releases the finishing capacity of the combined flaw detection line. The present invention can be promoted and applied in the same type of production lines of high-quality steel.

[0030] The technical solutions of the present invention are described in detail below through examples.

[0031] Taking the finishing of ￠45mm round bars as an example, the steps are as follows: 1000 ￠45mm round bars were selected and divided into two groups, each with 500 bars. The first group was processed using the existing process, i.e., the comparative example, while the second group was processed using the finishing process of the present invention, i.e., the embodiment. Comparative Example The first group of Ø45 round bars is hoisted onto the straightening loading platform, unbundled, and information such as steel type and rolling batch number is verified. The Ø80 two-roller straightening machine straightens the incoming material with a straightening accuracy of 1mm / m. The straightened round steel is transferred to the straightening and unloading platform through the material transfer device; the round steel on the straightening and unloading platform is transferred to the input roller before flaw detection through the material transfer device; The round steel is inspected by magnetic flux leakage detector and ultrasonic flaw detector, with magnetic flux leakage detection on the surface and ultrasonic flaw detection on the inside; The qualified products that have passed the flaw detection pass the output roller after the ultra-detection and enter the qualified product unloading platform for collection, bundling, weighing and storage; The surface defect material, i.e. unqualified product, is put into the unqualified product unloading rack through the material pushing device, and the unqualified product is manually ground on the offline grinding rack, and the grinding operation is performed by manually rotating the round steel to find the defect; The round steel manually ground on the offline grinding rack is adjusted to the straightening unloading rack, and the ground round steel on the straightening unloading rack is pushed to the flaw detection input roller by the material pushing device; The ground round steel is jointly detected by the magnetic flux leakage flaw detector and the ultrasonic flaw detector, and the surface defect material is re-detected; The round steel qualified in the re-detection is collected, baled, weighed and stored in the warehouse through the post-ultrasonic detection output roller and the qualified product unloading rack. The finishing time of the comparative example is shown in Table 1. Embodiment

[0032] The second group of Ø45 round bars is hung to the straightening feeding rack, the bale is unwound, and the steel grade, rolling batch number and other information are checked; the incoming material is straightened by the Ø80 two-roll straightening machine, and the straightening accuracy is 1mm / m; The straightened round steel is pushed to the straightening unloading rack by the material pushing device; and the round steel on the straightening unloading rack is pushed to the pre-flaw detection input roller by the material pushing device; The round steel is jointly detected by the magnetic flux leakage flaw detector and the ultrasonic flaw detector, and the surface is detected by the magnetic flux leakage flaw detector and the internal part is detected by the ultrasonic flaw detector; The qualified product qualified in the flaw detection is collected, baled, weighed and stored in the warehouse through the post-ultrasonic detection output roller and the qualified product unloading rack; The surface defect material, i.e. unqualified product, is put into the pre-magnetic flaw feeding rack 1 through the material pushing device, and the unqualified product is pushed to the pre-flaw detection input roller 2 by the grinding pushing device 3, and the surface defect material is manually ground on the pre-flaw detection input roller 2. The round steel can be rotated during grinding, and the roller can be moved forward and backward to move the round bar, which can improve the grinding efficiency and reduce the labor intensity; The ground round steel is put into the magnetic powder flaw detector through the pre-magnetic flaw conveying roller, the surface defect is found by the fluorescent magnetic powder, the round steel qualified in the re-detection is put into the magnetic flaw unloading rack by the material pushing device, and the unqualified round steel is collected in the unqualified collection frame; The round steel qualified in the re-detection is pushed to the transition roller by the material pushing device, and the round steel is pushed to the transition rack by the material pushing device; The round steel qualified in the re-detection is pushed to the original post-ultrasonic detection output roller by the material pushing device, and the qualified product unloading is collected, baled, weighed and stored in the warehouse. The finishing time of the embodiment is shown in Table 1. Table 1: Action time of new and old finishing processes Group Specification / mm Count Manual finishing time min Joint defect detection waiting time min Joint defect detection time min Total finishing time min Finishing count per minute First group Φ45 500 27 16 98 114 4.39 Second group Φ45 500 18 0 92 92 5.42 The artificial grinding time of the second group, i.e. the example, is 18 minutes, which is 9 minutes less than that of the first group, i.e. the comparison; the waiting time of the second group in the joint flaw detection is 0 minute, which is 16 minutes less than that of the first group; the joint flaw detection time of the second group is 92 minutes, which is 6 minutes less than that of the first group; the finishing time of the second group for finishing the whole batch of materials is 92 minutes, which is 22 minutes less than that of the first group; The finishing number per minute of the second group is 5.42 per minute, which is 1.03 per minute higher than that of the first group, and the production efficiency is increased by 23.46%.

[0033] It can be seen that the finishing process of the application saves the grinding time, reduces the labor intensity, improves the grinding efficiency, and runs the surface defect material through the online roller conveying mode, which gets rid of the dependence on the travelling crane, and the defect material re-detection is carried out on the magnetic particle flaw detector, which reduces the waiting and re-detection operation of the joint flaw detection finishing line, greatly improves the finishing line operation efficiency, releases the finishing capacity of the joint flaw detection line, and the application can be popularized and applied in the same type production line of the high-quality steel.

[0034] The above is only the preferred embodiment of the application, and the protection scope of the application is not limited to the above-mentioned embodiments, and any technical scheme falling within the idea of the application belongs to the protection scope of the application. It should be noted that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the application should also be considered as the protection scope of the application.

Claims

1. A finishing system for detecting surface defects in steel, characterized in that: The invention comprises a magnetic detection front loading platform (1), a magnetic detection front input roller (2), a magnetic particle inspection machine, a magnetic detection rear output roller, a magnetic detection rear unloading platform, a transition roller and a transition platform, wherein the magnetic detection front loading platform (1) is connected to the ultra-high detection rear output roller, the transition platform is connected to the qualified product unloading platform, and the magnetic detection front input roller (2) is used as an artificial grinding area, and the magnetic detection front input roller (2) is used to perform artificial grinding on the rolling of steel.

2. The finishing system for detecting surface defects of steel according to claim 1, characterized in that: The front loading platform (1) for magnetic detection comprises a platform body (11), a loading and dispensing mechanism (12), a blocking mechanism (13), and a unloading and dispensing mechanism (14) arranged on the platform body (11).

3. The finishing system for detecting surface defects of steel according to claim 1, characterized in that: The device also includes a grinding and material-selecting device (3), which is arranged between the magnetic detection front input roller (2) and the magnetic particle flaw detector. The grinding and material-selecting device (3) includes a material-selecting arm (31), a lifting device (32) and a transverse movement device (33).

4. The finishing system for detecting surface defects of steel according to claim 1, characterized in that: An inclined pair of rollers (34) is provided in the grinding and material removing device (3) to drive the round steel to rotate automatically when grinding defects on the round steel, wherein the inclined pair of rollers (34) can rotate forward and reverse.

5. The finishing system for detecting surface defects of steel according to claim 1, characterized in that: The magnetic particle inspection machine can detect cracks and various minor defects in any direction on the outer surface and near the surface of round steel. The surface inspection accuracy includes: longitudinal defect detection depth of 0.1 mm, circumferential defect detection depth of 0.1 mm, point defect detection depth of 0.1 mm, and no end detection blind area.

6. The finishing system for detecting surface defects of steel materials according to claim 5, characterized in that: The detection speed of the magnetic particle detector is 5-10 m / min, and the roller conveyor speed is ≤45 m / min.

7. A finishing process for steel with surface defects detected, characterized in that: The round steel is inspected using the finishing system according to any one of claims 1 to 6 as follows: The round steel enters the pre-straightening loading platform, and then enters the straightening unit and chamfering unit in turn for straightening and chamfering. Then it is inspected by magnetic flux leakage detector and ultrasonic flaw detector. The qualified products pass the inspection along the output roller after ultrasonic inspection and enter the qualified product unloading platform for packaging and weighing. Unqualified products that fail the flaw detection enter the loading platform (1) before magnetic detection along the output roller after the ultra-scanning, enter the input roller before magnetic detection (2) for manual grinding, and enter the magnetic particle flaw detector for re-inspection after completing the manual grinding. After the re-inspection, qualified round steel products enter the unloading platform after magnetic detection through the output roller after magnetic detection, and qualified products enter the qualified product unloading platform along the transition roller and transition platform, and undergo subsequent packaging and weighing processing. The re-inspected unqualified products are output to the offline workstation through the output roller after magnetic detection.

Images