Dot matrix quenching positioning method based on letterpress printing and ball rolling principle
By using modular splicing and rolling contact point design, the problems of poor cooling uniformity and insufficient plate shape control during steel strip quenching were solved, achieving uniform cooling across the entire cross section and high surface quality, while reducing production costs and environmental impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JUJIA IND SHANGHAI CO LTD
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-31
AI Technical Summary
Existing steel strip quenching methods suffer from problems such as poor cooling uniformity, difficulty in quenching thick plates, insufficient plate shape control, rigid width adaptation, inability to adapt to irregularly shaped steel strips, and the complexity and poor environmental performance of traditional lead quenching processes.
The dot matrix quenching positioning method based on the principle of movable type printing and ball rolling is adopted. Through the modular splicing structure and the design of rolling contact points, the steel strip surface and the template are precisely fitted and cooled in all directions. Ordinary water medium is used instead of expensive or toxic coolant to ensure uniform cooling and high surface quality of steel strip during quenching.
It achieves uniform cooling across the entire cross-section of the steel strip, avoids surface scratches, reduces production costs, improves equipment compatibility and environmental friendliness, and meets high surface quality requirements.
Smart Images
Figure CN122484445A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of metallurgical heat treatment technology, and in particular to a dot matrix quenching positioning method based on the principles of movable type printing and ball rolling. Background Technology
[0002] Steel strip quenching is a key process in the metallurgical heat treatment field to strengthen materials and improve their mechanical properties such as hardness, toughness, and strength. With the development of engineering machinery, marine engineering, high-end equipment manufacturing, and the automotive industry, higher demands are placed on the continuous quenching of wide and conventionally sized steel strips, especially in terms of uniform cooling across the entire cross-section, precise control of the strip shape, and flexible adaptation to equipment width. Currently, the quenching positioning methods widely used in the industry mainly include roller guides, integral pallet supports, tin plate isolation cooling, lead quenching, lead-bismuth alloy quenching, and conventional spray quenching. For 1250 / 1500mm conventional coils, 1.0-12mm thick, covering continuous quenching and cooling of hot-rolled / pickled / cold-rolled / flattened strips, the traditional fixed-point support structure in existing technologies has the following core pain points: The fixed point is in rigid contact, which is easy to scratch the surface: Traditional positioning structures mostly use the fixed point to slide contact with the steel strip surface. When the coil passes through, it is in sliding friction, which is easy to scratch the surface. In particular, it cannot meet the strict requirements of cold rolled coil for high surface quality.
[0003] Low efficiency and high cost of model changeover: The fixed-point structure cannot be quickly adapted to coils of different thicknesses. When changing models, the entire support structure needs to be replaced, which results in long debugging time, high cost, and poor production line flexibility.
[0004] Cooling media are expensive and not environmentally friendly: Traditional processes often use special quenching fluids such as PAG, which have high procurement costs and are difficult to dispose of waste liquid, which does not conform to the industry trend of energy conservation and cost reduction.
[0005] Insufficient plate shape control: Traditional structures have difficulty ensuring that the upper and lower support surfaces are strictly coplanar, making it easy for the rolled plate to shift during operation and causing plate shape defects such as warping and edge waviness after cooling.
[0006] In addition, most existing quenching equipment is designed with a fixed width, which cannot be flexibly adjusted according to the actual width of the steel strip, resulting in poor equipment compatibility. Summary of the Invention
[0007] The main objective of this invention is to provide a dot matrix quenching positioning method based on the principles of movable type printing and ball rolling. This method can effectively solve the problems of poor cooling uniformity, difficulty in quenching thick plates, insufficient plate shape control, rigid width adaptation, inability to adapt to irregularly shaped steel strips, and the complexity and poor environmental performance of traditional lead quenching processes in existing steel strip quenching methods.
[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A dot-matrix quenching positioning method based on the principles of movable type printing and ball bearing rolling includes quenching the steel strip to be quenched through the coolant in a quenching equipment. The quenching equipment includes an upper template and a lower template, each composed of multiple standard modules horizontally spliced together. Adjacent standard modules are positioned by locating pins. This modular splicing structure allows for flexible adjustment of the template size according to the actual width of the steel strip, eliminating the need to replace the main equipment, thus improving production compatibility and reducing equipment investment costs.
[0009] Both the upper and lower templates are equipped with multiple detachable rolling contact points arranged in a dot matrix pattern. These rolling contact points are bearings or steel balls, and each rolling contact point is fitted with a lifting adjustment sleeve and a locking nut at its bottom. The independent lifting and adjusting of the dot matrix rolling contact points allows for precise conformity to the surface contour of the steel strip, effectively solving the quenching positioning problem of irregularly shaped steel strips. Simultaneously, the rolling contact follow-up method significantly reduces frictional resistance, preventing scratches on the steel strip surface.
[0010] The upper and lower templates are respectively installed on the upper and lower moving frames of the quenching equipment, with the rolling contact points of the upper and lower templates vertically aligned and an adjustable gap between them. This symmetrical positioning structure ensures that the steel strip is subjected to uniform force across the entire surface during quenching, which helps to suppress warping and wave deformation.
[0011] Specifically, the method includes the following steps: S1. Modular template adaptation: Based on the standard width of the coil to be cooled, standard modules are spliced horizontally to form the upper and lower templates. Adjacent standard modules are positioned by positioning pins and locked with bolts to ensure that the overall flatness of the template after splicing is ≤±0.1mm. S2. Coplanar rolling contact point assembly: Removable rolling contact points are arranged in an equally spaced dot matrix on the upper and lower templates. The rolling contact points are bearings or steel balls. Each rolling contact point is installed through a lifting adjustment sleeve. The height of all rolling contact points is adjusted so that the rolling contact points of the upper and lower templates form strictly coplanar support surfaces. The gap between the upper and lower support surfaces is precisely matched with the thickness of the coil to be cooled. The locking nut is tightened to ensure that the coil does not move when passing through. S3. Water-based cooling system adaptation: The assembled upper and lower templates are immersed in a common water-based cooling system, and the water temperature is maintained at a constant level by a circulating pump, replacing the traditional PAG quenching fluid and reducing production costs. S4. Continuous cooling operation: The heated hot-rolled coil, pickled coil, cold-rolled coil, and flat plate are passed through the coplanar gap between the upper and lower templates at a uniform speed. The water medium wraps around the coil in all directions through the gap between the rolling contact points. At the same time, the rolling contact points roll with the coil, converting sliding friction into rolling friction, avoiding scratches on the surface of the coil, and ensuring that the flatness of the coil meets the standard after cooling.
[0012] As a preferred technical solution, the standard modules are horizontally spliced by bolts, and locating pins are provided between adjacent standard modules to ensure the flatness accuracy of the template after splicing, thereby improving the flatness of the plate shape during thick plate quenching.
[0013] As a preferred technical solution, the rolling contact points are arranged in an equally spaced dot matrix on the upper and lower templates, and the spacing is adjusted according to the thickness of the steel strip. For thick plates, the spacing can be appropriately widened to improve the coolant flow efficiency, while for thin plates, the spacing can be reduced to enhance the uniformity of support.
[0014] As a preferred technical solution, guide columns are installed around both the upper and lower templates. The guide columns are fixed to the quenching equipment, which can effectively prevent the templates from shifting during the quenching process and ensure that the upper and lower contact points are always vertically aligned.
[0015] As a preferred technical solution, the lifting and adjusting sleeve is a threaded lifting sleeve, with its lower end fixed to the template and its upper end connected to the rolling contact point. This threaded lifting structure can achieve micron-level height adjustment, facilitating precise matching of the contour requirements of flat steel strips or curved or irregularly shaped steel strips.
[0016] As a preferred technical solution, when the rolling contact point is a bearing, the bearing surface has a hardened layer, and the bearing is fixed to the template by detachable bolts. The hardened layer improves the wear resistance of the bearing and is suitable for large-scale continuous quenching production.
[0017] As a preferred technical solution, when the rolling contact point is a steel ball, the bottom of the steel ball has a threaded connecting rod, which is screwed into the mounting hole on the template. The steel ball has a simple structure and is easy to replace, making it particularly suitable for thin plates or high-precision steel strips with high surface quality requirements.
[0018] As a preferred technical solution, the adjustable gap between the upper and lower templates is matched with the thickness of the steel strip, and the gap range can cover steel strip thicknesses of 1.0-12mm, realizing universal quenching for wide thickness specifications.
[0019] As a preferred technical solution, the method further includes the step of switching the type of rolling contact point: disassembling the currently installed bearing or steel ball, replacing it with another type of rolling contact point, and readjusting the height. This quick switching function allows the same equipment to be compatible with both bearing matrix and steel ball matrix modes, greatly improving the flexibility of the production line and reducing switching time.
[0020] As a preferred technical solution, the coolant is a circulating constant-temperature coolant, the temperature of which is maintained constant by a circulating pump. Constant-temperature circulating cooling ensures consistent heat exchange conditions for the steel strip during its movement, which is beneficial for obtaining a uniform quenched structure.
[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides a dot matrix quenching positioning method based on the principle of movable type printing and ball rolling. It adopts a modular splicing structure, which can flexibly increase or decrease the number of standard modules according to the actual width of the steel strip without replacing the main body of the equipment, thereby improving production compatibility and reducing equipment investment costs. At the same time, guide columns are provided around the upper and lower templates to ensure that the templates are vertically aligned, suppressing warping and wave deformation during the quenching process of the steel strip, and obtaining a flat plate shape.
[0022] 2. This invention provides a dot matrix quenching positioning method based on the principle of movable type printing and ball rolling. By arranging dot matrix rolling contact points that can be grouped and adjusted coplanarly, a strictly coplanar support surface can be formed to ensure that there is no movement during conventional coil quenching and to obtain a high flatness plate shape. The contact points roll with the steel strip, converting sliding friction into rolling friction, greatly reducing frictional resistance and avoiding scratches on the steel strip surface.
[0023] 3. This invention provides a dot matrix quenching positioning method based on the principle of movable type printing and ball rolling. The upper and lower templates are immersed in ordinary industrial circulating water. The coolant wraps the steel strip in all directions through the gaps between the rolling contact points, realizing synchronous and rapid heat exchange between the surface and the core. This overcomes the limitation of unidirectional heat conduction in traditional surface quenching, meets the requirement of full-section quenching of thick steel strips, and eliminates the need for expensive media such as PAG or toxic media such as lead, significantly reducing costs and environmental impact, making it green and environmentally friendly. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the dot matrix quenching positioning method of the present invention; Figure 2 This is a schematic diagram of the quenching equipment of the present invention. Detailed Implementation
[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0026] Example 1: Continuous cooling of 1.5mm cold-rolled coil This embodiment provides a dot-matrix quenching positioning method based on the principle of movable type printing and ball rolling, specifically including the following steps: Modular template splicing: Standardized modules are used to splice together to form upper and lower templates with a width of 1250mm. The modules are positioned by positioning pins and locked by M16 bolts. After splicing, the flatness of the template is ≤±0.1mm and the height difference of the joint is ≤0.05mm.
[0027] Rolling contact point layout: GCr15 steel balls with a diameter of 20mm are selected as contact points and arranged in an evenly spaced matrix with a spacing of 20mm. Taking the center of the template as the reference, the height of all steel balls is adjusted in groups to ensure that the upper and lower support surfaces are strictly coplanar. The upper and lower gaps are adjusted to 1.5mm and locked with nuts. The height difference between adjacent steel balls is ≤0.05mm.
[0028] Water-based cooling system: The entire template is immersed in ordinary industrial circulating water, and the water temperature is maintained at 30±1℃ by a circulating pump and plate heat exchanger, without the need to add PAG quenching fluid.
[0029] Continuous cooling operation: The 1.5mm cold-rolled coil heated to 850℃ is passed through the gap of the template at a uniform speed of 1.0m / min. The water medium wraps around the coil in all directions through the gap of the steel balls. The steel balls roll with the coil and the frictional resistance is ≤3N / cm².
[0030] Results verification: After cooling, the flatness error of the coil is ≤ ±0.15mm, with no warping or edge waviness, no scratches on the surface, and uniform core hardness, fully meeting the quality requirements of cold-rolled coils. The production cost is reduced by more than 60% compared to the PAG process.
[0031] Example 2: Continuous cooling of 10mm hot-rolled flat plate This embodiment is basically the same as Embodiment 1, except that: The steel strip to be quenched is a 10mm thick, 1500mm wide hot-rolled sheet. Hardened bearings with an outer diameter of 30mm are used at the contact points, spaced 40mm apart. The templates are constructed using standardized modular splicing to form upper and lower templates with a width of 1500mm, achieving a flatness of ≤±0.1mm. The upper and lower support surfaces are adjusted to be coplanar, with a gap of 10mm, and then locked in place. The water cooling system maintains a water temperature of 35±1℃. The 10mm hot-rolled sheet, heated to 900℃, is passed through the template gap at a uniform speed of 0.6m / min; the bearings roll with the sheet without scratching. After cooling, the flatness error of the coil is ≤±0.2mm, the entire cross-section is fully quenched, the hardness is uniform, and the changeover time is only 25 minutes, significantly improving debugging efficiency.
[0032] Example 3: Rapid switching of rolling contact points This embodiment demonstrates two methods for quickly switching between dot matrix modes, as detailed below: The current equipment uses a steel ball dot matrix mode and needs to be switched to a bearing dot matrix mode to adapt to thick plate production. The operation steps are as follows: Stop the equipment, drain the coolant, and disassemble the upper and lower templates; Use a wrench to disassemble each steel ball and remove all steel balls; Clean the mounting holes at the contact points on the template and check if the threads are intact; Install a hardened bearing with an outer diameter of 30mm, which is secured by removable bolts; Reassemble the template, using the template center as a reference, and adjust the height of all bearings in groups to form a strictly coplanar support surface, thus completing the switchover.
[0033] For switching from 1.0mm cold-rolled coil to 8mm hot-rolled coil, the entire changeover process takes ≤30 minutes, without the need to replace the main template, greatly improving the flexibility of the production line.
[0034] The working principle of this dot matrix quenching and positioning method based on movable type printing and ball rolling is explained in detail below.
[0035] like Figure 1 , Figure 2 As shown, based on the modular splicing principle of movable type printing and the rolling positioning principle of a ballpoint pen, standardized dot matrix templates are flexibly spliced into a symmetrical dot matrix positioning structure according to the actual width of the steel strip to be quenched. Removable bearings or large-diameter steel balls are evenly distributed on the templates as contact points, forming a high-density or wide-spacing dot matrix support surface. Before quenching, according to the thickness and flatness requirements of the steel strip, all contact points are efficiently adjusted to be strictly coplanar through group adjustment and benchmark positioning, forming a precise planar support, which is then fixed using a locking mechanism. The assembled and adjusted upper and lower templates are immersed in ordinary industrial circulating water. The steel strip, heated at high temperature, passes continuously and uniformly through the reserved gap between the upper and lower templates. At this time, the upper and lower contact points apply a uniform dot matrix from the upper and lower surfaces of the steel strip, respectively. The system utilizes a support force and, with the aid of rolling elements such as bearings or steel balls, transforms the sliding friction between the steel strip and the template into rolling friction. This achieves precise guidance and positioning of the steel strip across the entire surface while reducing resistance and surface scratches. Simultaneously, coolant, through the gaps between contact points, completely envelops the entire surface and sides of the steel strip, enabling rapid heat exchange between the surface and core. This overcomes the limitation of traditional surface quenching where heat can only be conducted in one direction, thus achieving uniform quenching and cooling of the entire cross-section during continuous movement. When it is necessary to change the steel strip specifications, there is no need to replace the main equipment. Simply increase or decrease the number of splicing modules to change the equipment width, regroup and adjust the coplanar height of the contact points, or quickly change between the bearing / steel ball matrix modes to repeat the above-mentioned positioning and cooling synergy process.
[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A dot-matrix quenching positioning method based on the principles of movable type printing and ball bearing rolling, comprising quenching the steel strip to be quenched by passing it through the coolant of a quenching equipment, characterized in that: The quenching equipment includes an upper template and a lower template, which are each composed of multiple standard modules spliced together horizontally, and adjacent standard modules are positioned by positioning pins. Both the upper and lower templates are provided with multiple detachable rolling contact points in a dot matrix pattern. The rolling contact points are bearings or steel balls, and each rolling contact point is equipped with a lifting adjustment sleeve and a locking nut at its bottom. The upper and lower templates are respectively installed on the upper and lower movable frames of the quenching equipment, and the rolling contact points of the upper and lower templates are vertically aligned, with an adjustable gap between the upper and lower templates. The method includes the following steps: S1. Modular template adaptation: Based on the standard width of the coil to be cooled, standard modules are spliced together laterally to form the upper and lower templates. Adjacent standard modules are positioned by positioning pins and locked with bolts. S2. Coplanar rolling contact point assembly: Detachable rolling contact points are arranged in an equally spaced dot matrix on the upper and lower templates. The rolling contact points are bearings or steel balls. Each rolling contact point is installed through a lifting adjustment sleeve. The height of all rolling contact points is adjusted so that the rolling contact points of the upper and lower templates form strictly coplanar support surfaces. The gap between the upper and lower support surfaces is precisely matched with the thickness of the coil to be cooled. The locking nuts are used to fix it. S3. Water-based cooling system adaptation: The assembled upper and lower templates are immersed in a common water-based cooling system, and the water temperature is maintained at a constant level by a circulating pump, replacing the traditional PAG quenching fluid. S4. Continuous cooling operation: The heated hot-rolled coil, pickled coil, cold-rolled coil, and flat plate are passed through the coplanar gap between the upper and lower templates at a uniform speed. The water medium wraps around the coil in all directions through the gap between the rolling contact points. At the same time, the rolling contact points roll with the coil, converting sliding friction into rolling friction.
2. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: The standard modules are horizontally spliced together by bolts, and locating pins are provided between adjacent standard modules.
3. The dot-matrix quenching and positioning method based on movable type printing and ball rolling principle according to claim 1, characterized in that: The rolling contact points are arranged in an equally spaced dot matrix on the upper and lower templates, and the spacing is adjusted according to the thickness of the steel strip.
4. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: Guide columns are installed around both the upper and lower templates, and the guide columns are fixed to the quenching equipment.
5. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: The lifting adjustment sleeve is a threaded lifting sleeve, with its lower end fixed to the template and its upper end connected to the rolling contact point.
6. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: When the rolling contact point is a bearing, the bearing surface has a hardened layer, and the bearing is fixed to the template by detachable bolts.
7. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: When the rolling contact point is a steel ball, the bottom of the steel ball has a threaded connecting rod, which is screwed into the mounting hole on the template.
8. The dot-matrix quenching and positioning method based on movable type printing and ball rolling principle according to claim 1, characterized in that: The adjustable gap between the upper and lower templates is matched with the thickness of the steel strip.
9. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: The method also includes the step of switching the type of rolling contact point: removing the currently installed bearing or ball bearing, replacing it with another type of rolling contact point, and readjusting the height.
10. The dot-matrix quenching and positioning method based on movable type printing and ball bearing rolling principle according to claim 1, characterized in that: The coolant is a circulating constant-temperature coolant, and its temperature is maintained constant by a circulating pump.