A strip gap adjustment device in amorphous strip production

Abstract

The utility model relates to a kind of non-crystalline strip production spray strip gap adjusting device, including spray stand, cooling roll is installed on the stand, nozzle is located above cooling roll, laser grating is fixedly installed on the stand after nozzle, the light emitted by laser grating can cover the lower end of nozzle and the upper end of cooling roll in vertical height, ground glass is set on the stand before nozzle, scale is processed on ground glass plate, the ground glass is fixedly connected on support, support both ends are rotatably connected on left and right two supports by damping shaft, support is fixedly connected on stand.The device is simple in structure, easy to adjust, and can improve efficiency and avoid quality problems in non-crystalline strip production.

Description

Technical Field

[0001] This utility model relates to the production of amorphous ribbon, and in particular to a spray gap adjustment device in the production of amorphous ribbon. Background Technology

[0002] The single-roll quenching method is currently the most mainstream process for the industrial production of amorphous ribbons (such as iron-based, cobalt-based, and silicon-based amorphous alloy ribbons). Its core principle is to achieve rapid contact between the high-temperature molten material and the surface of a high-speed rotating cooling roller, thus achieving 10... 5 -10 6 Ultra-fast solidification at K / s inhibits crystal nucleation and growth, ultimately yielding amorphous ribbons. This process offers advantages such as simple equipment, high production efficiency, and stable ribbon quality, and is widely used in transformer cores, sensors, magnetic components, and other fields. The core principle for amorphous ribbon formation is **"cooling rate > critical cooling rate"** (the critical value varies for different alloys; for example, iron-based amorphous ribbons require >10 K / s). 5The single-roller rapid cooling method, with a temperature of 1000–1600℃ (50–150℃ above the liquidus temperature), achieves its effect through the synergistic action of three key elements: First, precise delivery of high-temperature melt: alloy raw materials (such as Fe-Si-B, Co-Fe-B, etc.) are heated to 1300–1600℃ in an induction furnace to form a uniform melt, avoiding strip defects caused by unmelted particles; Second, efficient heat conduction interface: the melt is sprayed through a nozzle slit (width 1–1.5 mm, thickness 0.2–0.5 mm) at a certain pressure (0.03–0.08 MPa) onto the surface of a copper alloy cooling roller (thermal conductivity >380 W / (m・K)), utilizing the high thermal conductivity of the copper roller to quickly remove heat; Third, stable dynamic contact: the cooling roller rotates at a high speed of 20–60 m / s, causing the melt to form a continuous "molten pool" on the roller surface, and rapidly solidify into a strip (thickness 15–35 μm, width 20–200 mm) as the roller moves. (mm), and then separated from the roller surface by a peeling device to complete continuous production. In the production of amorphous ribbon, the spray gap refers to the working distance between the nozzle and the cooling roller surface. When the roller surface and the nozzle are parallel and horizontal, the spray gap is a very important process parameter. If the spray gap is too small, it will easily lead to friction and blockage between the nozzle and the roller surface, causing ribbon defects; if the spray gap is too large, the cooling rate will be insufficient, the amorphization will be incomplete, the ribbon will be too thick, and it will be prone to crystallization. Therefore, the spray gap needs to be adjusted to a suitable range before production. The adjustment of the spray gap is achieved by adjusting and moving the nozzle. The conventional adjustment of the gap is to measure the gap size with a feeler gauge after adjusting the nozzle. Then adjustments are made based on the measurement results until the requirements are met. This method requires multiple measurements and adjustments, which is quite cumbersome. Furthermore, the feeler gauge comes into contact with and rubs against the cooling roller surface during measurement, negatively impacting the surface finish (roughness) of localized points on the cooling roller. Surface finish is a crucial performance indicator for cooling rollers; increased roughness increases the thermal resistance between the roller surface and the melt, reduces the cooling rate, and easily leads to strip crystallization. It can also cause indentations and scratches on the strip surface, affecting the stacking coefficient and magnetic properties. Additionally, it can easily lead to strip adhesion, edge cracking, or roll entanglement, reducing production stability. Existing technologies also use laser / eddy current sensors to measure the distance between the nozzle ends and the roller surface, adjusting to the target value via a motor-driven mechanism. This method is complex and costly. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned problems in the adjustment of the spray gap in the production of amorphous ribbon, and to provide a spray gap adjustment device for the production of amorphous ribbon.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted: A spray gap adjustment device for amorphous ribbon production includes a spray machine base, a cooling roller installed on the machine base, a nozzle located above the cooling roller, a laser grating fixedly installed on the machine base behind the nozzle, the light emitted by the laser grating can cover the lower end of the nozzle and the upper end of the cooling roller in vertical height, a frosted glass is provided on the machine base in front of the nozzle, the frosted glass plate is processed with scale, the frosted glass is fixedly connected to a bracket, the two ends of the bracket are rotatably connected to two supports on the left and right sides through damping shafts, and the supports are fixedly connected to the machine base.

[0005] Furthermore, the two ends of the bracket are rotatably connected to two supports via 90-degree or 180-degree positioning hinges.

[0006] Furthermore, the laser grating port is equipped with a cover.

[0007] The positive and beneficial technical effects of this utility model are as follows: the device has a simple structure and is easy to adjust. When used in the production of amorphous ribbon, it can improve efficiency and avoid quality problems. A detailed description is provided below with reference to specific implementation methods. Attached Figure Description

[0008] Figure 1 This is an overall schematic diagram of the present invention. Detailed Implementation

[0009] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.

[0010] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: base; 2: cooling roller; 3: nozzle; 4: laser grating; 5: frosted glass; 6: bracket; 7: damping shaft; 8: support.

[0011] As shown in the attached figure, an amorphous ribbon production spray gap adjustment device includes a spray machine base 1, a cooling roller 2 mounted on the base 1, a nozzle 3 located above the cooling roller, and a laser grating 4 fixedly mounted on the base behind the nozzle 3. The laser grating opening is fitted with a cover to prevent contamination when not in use. The light emitted by the laser grating can vertically cover the lower end of the nozzle and the upper end of the cooling roller. A frosted glass plate 5 is mounted on the base in front of the nozzle, with graduations machined on it. The frosted glass is fixedly connected to a bracket 6, and both ends of the bracket are rotatably connected to two supports via damping shafts 7. The supports are fixedly connected to the base.

[0012] In this embodiment, the two ends of the bracket are rotatably connected to two supports via 90-degree or 180-degree positioning hinges.

[0013] The laser grating of this invention can be made using a cross-shaped red light grating purchased online, and the frosted glass can be marked with laser to create the scale.

[0014] When using this device, turn the frosted glass to a vertical position, turn on the laser grating, and light will shine onto the frosted glass through the gap between the nozzle and the cooling roller. The size of the light in the opposite direction measured by the scale on the frosted glass is the size of the gap. Adjust the nozzle according to this size, and the size of the gap will change synchronously. This can be observed in real time through the scale on the frosted glass. Adjust it to the required range. After adjustment, flip the frosted glass upward to move it away from the cooling roller, and production can begin.

[0015] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.

Claims

1. A spray gap adjustment device for amorphous ribbon production, comprising a spray machine base, a cooling roller mounted on the base, and a nozzle positioned above the cooling roller, characterized in that: A laser grating is fixedly installed on the base behind the nozzle. The light emitted by the laser grating can cover the lower end of the nozzle and the upper end of the cooling roller in vertical height. A frosted glass plate is set on the base in front of the nozzle. The frosted glass plate is machined with scales. The frosted glass is fixedly connected to the bracket. The two ends of the bracket are rotatably connected to the left and right supports through damping shafts. The supports are fixedly connected to the base.

2. The spray gap adjustment device for amorphous ribbon production according to claim 1, characterized in that: The two ends of the bracket are rotatably connected to two supports via 90-degree or 180-degree positioning hinges.

3. The spray gap adjustment device for amorphous ribbon production according to claim 1, characterized in that: The laser grating port is equipped with a cover.

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