A local precision zinc scraping device for galvanized steel sheet

Abstract

The utility model relates to metal sheet processing technical field, concretely relates to a kind of local precision zinc scraping device for galvanized steel sheet.The rack is equipped with a slide rail, fixed seat is movably arranged on the slide rail, and a screw hole is equipped on the edge of fixed seat and adjusting plate, fixed seat and adjusting plate are connected by a screw rod through corresponding screw hole, adjusting wheel is fixedly arranged at one end of screw rod, and lifting adjusting structure is formed, a connecting shaft is arranged on adjusting plate, the connecting shaft passes through fixed seat, tool holder seat is hingedly connected with one end of connecting shaft, a group of locking bolts for locking the hinged part of tool holder seat and connecting shaft are arranged on tool holder seat, and tool head is fixedly arranged on tool holder seat.The above structure can efficiently, cleanly and accurately scrape off the zinc layer of the welding area of galvanized steel sheet, without damaging the steel plate base material and without dust pollution, thereby significantly improving the subsequent welding quality, improving production efficiency and product yield.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet processing technology, specifically to a local precision zinc scraping device for galvanized steel sheets. Background Technology

[0002] Galvanized steel sheets are widely used in industries such as steel structure construction, automobiles, and home appliances due to their excellent corrosion resistance. These galvanized steel sheets typically need to be processed into profiles or components with specific cross-sectional shapes through roll forming production lines, and their longitudinal seams are welded together in subsequent stations using methods such as high-frequency welding.

[0003] The presence of a galvanized layer (mainly composed of zinc) poses a serious challenge to welding quality:

[0004] Welding defects can occur because zinc's melting point (approximately 420°C) is much lower than that of steel (approximately 1500°C). At the high temperatures of welding, the zinc layer vaporizes, producing zinc vapor. If this vapor is trapped in the molten pool, it can easily lead to defects in the weld such as porosity, lack of fusion, and zinc inclusions, severely reducing the mechanical properties and sealing performance of the weld.

[0005] Contamination of electrodes and equipment: In processes such as high-frequency welding, vaporized zinc can contaminate welding electrodes and inductors, shortening their service life and increasing maintenance costs and downtime.

[0006] Affecting welding stability: Zinc vapor interferes with the stability of the electric arc or high-frequency current, leading to instability in the welding process and requiring frequent adjustments to process parameters.

[0007] Currently, the industry typically employs the following methods to address this issue:

[0008] Mechanical grinding method: This method uses an angle grinder or grinding wheel to grind the welded area offline or online. This method is labor-intensive, inefficient, produces uneven grinding depth and width, easily damages the steel substrate, and generates dust pollution. It cannot meet the cycle time and quality requirements of modern high-speed production lines.

[0009] Chemical pickling: This method involves soaking or coating the zinc layer with a strong acid (such as hydrochloric acid) to dissolve it. This method causes significant environmental pollution, requires wastewater treatment, is highly dangerous, and the acid may corrode untreated areas of the steel plate and production line equipment. The process is complex and difficult to integrate into a continuous production line.

[0010] The whole stripping method removes the zinc layer of the entire roll of sheet by means of flame heating, but this method completely loses the anti-corrosion advantages of galvanized sheet and is only used in situations where the whole sheet needs to be painted at the end, which is very limited. Utility Model Content

[0011] The purpose of this invention is to solve the above-mentioned problems by proposing a local precision zinc scraping device for galvanized steel sheets.

[0012] To achieve the above objectives, this utility model provides the following technical solution:

[0013] A local precision zinc scraping device for galvanized steel sheets includes a frame, characterized by further including a sheet positioning and guiding mechanism for positioning and guiding and maintaining the stability of the sheet position, a zinc scraping execution mechanism for local precision zinc scraping, and a zinc shavings treatment mechanism for cleaning zinc shavings. The sheet positioning and guiding mechanism, the zinc scraping execution mechanism, and the zinc shavings treatment mechanism are all mounted on the frame. The zinc scraping execution mechanism includes a cutter head, a cutter head seat, an adjusting plate, and a fixed seat. The frame is provided with a slide rail, and the fixed seat is movably mounted on the slide rail. A screw hole is provided on the edge of the fixed seat and on the adjusting plate. The fixed seat and the adjusting plate are connected by a lead screw passing through the corresponding screw hole. An adjusting wheel is fixedly mounted on one end of the lead screw to form a lifting and adjusting structure. A connecting shaft is provided on the adjusting plate, and the connecting shaft passes through the fixed seat. The cutter head seat is hinged to one end of the connecting shaft. A set of locking bolts is provided on the cutter head seat for locking the hinged part of the cutter head seat and the connecting shaft. The cutter head is fixedly mounted on the cutter head seat.

[0014] Preferably, a set of balancing rollers are symmetrically arranged on both sides of the cutter head.

[0015] Preferably, the zinc chip treatment mechanism includes a cleaning nozzle and a negative pressure chip suction port. The negative pressure chip suction port is located on one side of the cutter head seat, corresponding to the position of the cutter head. The cleaning nozzle is located in front of the negative pressure chip suction port and is connected to a dust collection pipe.

[0016] Preferably, the plate positioning and guiding mechanism includes a transmission roller for driving the plate and at least one set of guide rollers. The guide rollers are located behind the transmission roller station and are positioned above and below to clamp the plate. Both ends of the guide rollers are rotatably connected to the positioning plate. The positioning plate is adjustablely mounted on the frame by adjusting screws.

[0017] The present invention provides a local precision zinc scraping device for galvanized steel sheets, which has the following advantages:

[0018] 1. Clean and efficient: It adopts the method of "mechanical scraping + immediate treatment of dust and waste", which produces almost no dust pollution, keeps the working environment clean, and centrally recycles and treats zinc scrap, making it environmentally friendly and efficient.

[0019] 2. Zero damage to the substrate: By precisely controlling the cutting depth and angle of the scraper, it is possible to achieve a precise operation that "scrapes only the zinc layer without damaging the steel substrate", resulting in a uniform removal effect and providing a perfect interface for welding.

[0020] 3. High-efficiency online integration: The device operates stably and can be directly integrated into a high-speed roller pressing production line. It has a high degree of automation and its production efficiency is perfectly matched with the production line cycle time.

[0021] 4. Low maintenance cost: The scraper head is a standard part, which is easy to replace and has low cost; there are no consumables (such as grinding wheels) and no chemical reagents are consumed, resulting in low long-term use cost.

[0022] 5. Improved welding quality: The clean, zinc-free surface to be welded completely eliminates the influence of zinc vapor, resulting in very few defects such as weld porosity and spatter, high weld strength, and stable and reliable product quality.

[0023] 6. High adaptability: By adjusting the scraper angle, it can adapt to different thicknesses of galvanized coating (such as GI, GL, AZ150, etc.) and different plate thicknesses. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the zinc scraping actuator of this utility model; Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] See attached document Figure 1-2 A local precision zinc scraping device for galvanized steel sheets includes a frame 1, a sheet positioning and guiding mechanism for positioning and guiding and maintaining the stability of the sheet position, a zinc scraping execution mechanism for local precision zinc scraping, and a zinc shavings treatment mechanism for cleaning zinc shavings. The sheet positioning and guiding mechanism, the zinc scraping execution mechanism, and the zinc shavings treatment mechanism are all mounted on the frame 1. The zinc scraping execution mechanism includes a cutter head 2, a cutter head seat 21, an adjusting plate 3, and a fixed seat 4. The frame 1 is provided with a slide rail 11, and the fixed seat 4 is movably mounted on the slide rail 11. On the upper part, the edge of the fixed seat 4 and the adjusting plate 3 are provided with a screw hole. The fixed seat 4 and the adjusting plate 3 are connected by a screw rod 31 passing through the corresponding screw hole. An adjusting wheel 32 is fixedly installed at one end of the screw rod 31 to form a lifting and adjusting structure. A connecting shaft 33 is provided on the adjusting plate 3. The connecting shaft 33 passes through the fixed seat 4. The cutter head seat 21 is hinged to one end of the connecting shaft 33. A set of locking bolts 22 for locking the hinge part of the cutter head seat 21 and the connecting shaft 33 is provided on the cutter head seat 21. The cutter head is fixedly installed on the cutter head seat.

[0028] A set of balance rollers 23 are symmetrically arranged on both sides of the cutter head.

[0029] The zinc dust removal mechanism includes a cleaning nozzle 5 and a negative pressure dust suction port 6. The negative pressure dust suction port 6 is located on one side of the cutter head seat 21, corresponding to the position of the cutter head 2. The cleaning nozzle 5 is located in front of the negative pressure dust suction port 6 and is connected to a dust collection pipe 7.

[0030] The plate positioning and guiding mechanism includes a transmission roller 8 for driving the plate and at least one set of guide rollers 9. The guide rollers 9 are located behind the position of the transmission roller 8 and are positioned above and below to clamp the plate. The two ends of the guide rollers 9 are rotatably connected to the positioning plate 91. The positioning plate 91 is adjustablely mounted on the frame 1 by adjusting the screw 92.

[0031] Working principle:

[0032] During processing, the sheet metal 10 is placed on the transmission roller 8 for transmission, with one end entering the guide roller 9 and being clamped by the guide roller 9. The clamping thickness of the guide roller 9 is controlled by rotating the adjusting screw 92 to control the raising and lowering of the positioning plate 91 according to different thicknesses. One side of the sheet metal 10 rests against the positioning plate 91 for lateral positioning. Of course, this is the most basic positioning. In this embodiment, a set of lateral adjusting rollers 93 is added to clamp the sheet metal 10 for lateral positioning. Then, the angle and depth of the cutter head 2 are adjusted to determine the zinc scraping thickness. When scraping zinc, the cleaning nozzle 5 first sprays air onto the surface of the sheet metal 10 to remove impurities and dust from the surface of the sheet metal 10. Then, while scraping zinc, the negative pressure chip suction port 6 simultaneously sucks up the zinc chips to maintain surface cleanliness. The zinc chips are collected through the dust collection pipe 7 to complete the entire process.

[0033] When adjusting the cutter head 2, axial adjustment is achieved by rotating the adjusting wheel 32 to control the raising and lowering of the adjusting plate 3, while circumferential adjustment is achieved by rotating the connecting shaft 33 and then tightening the bolt 41 on the fixed seat 4 for positioning. The cutting angle of the cutter head 2 can be adjusted by loosening the locking bolt 22 and rotating the cutter head seat 21 for small angle adjustment, and by loosening the fixing bolts 211 on both sides of the cutter head seat 21 and rotating the cutter head 2 to re-lock it.

[0034] Of course, this application mainly protects the mechanical structure. In actual use, the various actuators can be controlled by electromechanical combinations in existing technologies such as PLC controllers, production line encoders, edge trackers, and multi-dimensional adjustable servo motors, which can further improve accuracy and operating efficiency.

[0035] This embodiment can achieve the following practical technical indicators and effects:

[0036] 1. Zinc removal effect: Zinc layer removal rate ≥99.8%, with no scratches or damage to the steel plate substrate.

[0037] 2. Geometric accuracy: Except for the zinc strip position accuracy of ±0.3mm, the width control accuracy is ±0.1mm.

[0038] 3. Surface quality: The surface is flat and smooth after scraping, without defects such as burrs or flanging.

[0039] 4. Production efficiency: The processing speed is synchronized with the production line, reaching up to 60-120m / min.

[0040] 5. Environmental protection indicators: Dust concentration in the work area <2mg / m³ 3 (Far superior to national occupational health standards).

[0041] 6. Welding quality: The porosity of the weld is reduced to <0.5%, and the weld strength reaches more than 98% of the strength of the base material.

[0042] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A local precision zinc scraping device for galvanized steel sheets, comprising a frame, characterized in that: It also includes a plate positioning and guiding mechanism for positioning and guiding and maintaining the stability of the plate station, a zinc scraping execution mechanism for localized and precise zinc scraping, and a zinc shavings treatment mechanism for cleaning zinc shavings. The plate positioning and guiding mechanism, the zinc scraping execution mechanism, and the zinc shavings treatment mechanism are all mounted on the frame. The zinc scraping execution mechanism includes a cutter head, a cutter head seat, an adjusting plate, and a fixed seat. The frame is provided with a slide rail, and the fixed seat is movably mounted on the slide rail. The edge of the fixed seat and the adjusting plate are each provided with a screw hole. The fixed seat and the adjusting plate are connected by a lead screw passing through the corresponding screw hole. An adjusting wheel is fixedly mounted on one end of the lead screw to form a lifting and adjusting structure. The adjusting plate is provided with a connecting shaft, which passes through the fixed seat. The cutter head seat is hinged to one end of the connecting shaft. The cutter head seat is provided with a set of locking bolts for locking the hinged part of the cutter head seat and the connecting shaft. The cutter head is fixedly mounted on the cutter head seat.

2. The local precision zinc scraping device for galvanized steel sheets according to claim 1, characterized in that: A set of balancing rollers is symmetrically arranged on both sides of the cutter head.

3. The local precision zinc scraping device for galvanized steel sheets according to claim 1 or 2, characterized in that: The zinc chip handling mechanism includes a cleaning nozzle and a negative pressure chip suction port. The negative pressure chip suction port is located on one side of the cutter head seat, corresponding to the position of the cutter head. The cleaning nozzle is located in front of the negative pressure chip suction port and is connected to a dust collection pipe.

4. The local precision zinc scraping device for galvanized steel sheets according to claim 1 or 2, characterized in that: The plate positioning and guiding mechanism includes a transmission roller for driving the plate and at least one set of guide rollers. The guide rollers are located behind the transmission roller station and are positioned above and below to clamp the plate. Both ends of the guide rollers are rotatably connected to the positioning plate. The positioning plate is adjustablely mounted on the frame by adjusting screws.

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