Furniture multifunctional ratchet joint material formula and manufacturing process thereof
By using metal alloy steel materials with a specific chemical composition ratio and fine craftsmanship to make ratchet joints, the wear resistance problem of ratchet joints for furniture when used for a long time or under high force is solved, and high wear resistance and stability are achieved.
Patent Information
- Application Number
- CN202510873538.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-09-16
AI Technical Summary
The ratchet joint components of existing furniture threaded spindles are prone to quality problems such as tooth slippage and deformation when used for a long time or subjected to large forces, and have low wear resistance.
The ratchet joint product is made from a metal alloy steel material formula with a specific chemical composition ratio, including C, Si, Mn, P, S, Cr, Ni, Cu and Fe and inevitable impurities, through converter smelting, LF refining, slab continuous casting, hot rolling and cold rolling processes.
The wear resistance of the ratchet joint is improved, and the problems of tooth slippage and deformation during long-term use or under high force are avoided, which significantly improves the product quality.
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Figure CN120648964A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metal alloy steel, and in particular to a formula of a multifunctional ratchet joint material for furniture and a manufacturing process thereof. Background Art
[0002] In household power chairs, movable elements are arranged between the side parts of the main body. These include, for example: a seat that can be adjusted in inclination and longitudinally; a backrest that can be adjusted in inclination and also in height; and a footrest that can be constructed in one or more parts and can be pivoted into and out of different positions. To electrically implement these movement possibilities, the power chair has a drive element in the form of a motor / gear unit, fixed to a frame part (fixed between the side arms of the main body). A tube extends from the drive element, and a drive element (e.g., a threaded spindle) is rotatably held in the tube. The threaded spindle drives an adjustment slide, moving it forward or backward along the tube in the direction of the seat. Components of an adjustment mechanism (e.g., an adjustment lever or the like) are articulated or fixed to the adjustment slide, which enables the movement of the movable elements of the power chair.
[0003] Existing threaded spindles are typically equipped with a ratchet joint component that is rotatably connected to the adjustment slider. However, over time or when subjected to significant forces, these ratchet joints can experience quality issues such as tooth slippage and deformation, leading to low wear resistance. Therefore, further improvements to the existing technology are necessary. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a formula of a multifunctional ratchet joint material for furniture and a manufacturing process thereof in view of the above-mentioned defects of the prior art.
[0005] In order to solve the above technical problems, the technical solution of the present invention is:
[0006] A formula for a multifunctional ratchet joint material for furniture comprises the following chemical components by weight: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.13% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, and the remainder being Fe and unavoidable impurities.
[0007] Preferably, the chemical composition by weight percentage is: C: 0.50% to 0.52%, Si: 0.22% to 0.24%, Mn: 0.62% to 0.64%, P: 0.012% to 0.014%, S: 0.004% to 0.006%, Cr: 0.15% to 0.17%, Ni: 0.02% to 0.04%, Cu: 0.03% to 0.05%, and the rest is Fe and unavoidable impurities.
[0008] Preferably, the chemical composition by weight percentage is: C: 0.51%, Si: 0.23%, Mn: 0.63%, P: 0.013%, S: 0.005%, Cr: 0.16%, Ni: 0.03%, Cu: 0.04%, and the rest is Fe and unavoidable impurities.
[0009] In order to solve the above technical problems, the present invention also provides a process for manufacturing a multifunctional ratchet joint for furniture, comprising the following steps: obtaining molten steel meeting the target composition through converter smelting; after tapping the converter, transporting the molten steel to an LF refining furnace for molten steel temperature control, desulfurization, alloy composition control, and calcium wire feeding treatment; continuously casting the molten steel after treatment in the refining furnace to obtain a continuously cast slab, wherein the chemical composition by weight of the continuously cast slab is as follows: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.13% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, and the rest are Fe and inevitable impurities; the continuous casting slab is heated in a heating furnace and then hot rolled, and the continuous casting slab is fed into the heating furnace by a hot charging and hot delivery method, and the hot rolling is a two-stage rolling process, the rough rolling is 6 continuous rolling passes, and the rolling is performed above the austenite recrystallization temperature, and the finishing rolling is 7 continuous rolling passes; after finishing rolling, laminar cooling is performed using front-stage cooling, and the hot-rolled steel coil is obtained when the coiling temperature is 680-690°C; the hot-rolled steel coil is re-uncoiled, pickled, cold rolled once, annealed in a hood annealing furnace, and cold rolled twice to obtain a finished product of a multifunctional ratchet joint for ratchet joint furniture.
[0010] Preferably, the temperature of the continuous casting slab entering the heating furnace is 800-900° C., the heating temperature of the continuous casting slab is 1300-1400° C., and the heating time is 160-170 minutes.
[0011] Preferably, the rough rolling end temperature is 1060-1090°C; the finish rolling end temperature is 920-940°C.
[0012] By adopting the above-mentioned technical scheme, the present invention provides a furniture multifunctional ratchet joint material formula and its manufacturing process, which have the following beneficial effects: the ratchet joint product for furniture produced by the furniture multifunctional ratchet joint manufacturing process of the present invention has greatly improved product quality and wear resistance, and will not have quality problems such as slipping teeth and deformation when used for a long time or subjected to large forces, and has high wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic structural diagram of the multifunctional ratchet joint product of the present invention;
[0014] In the figure, 1-first inner plate, 2-second inner plate, 3-first pin, 4-right-angle rod, 5-opening spring, 6-movable buckle, 7-first toothed rotating inner plate, 8-second toothed rotating inner plate, 9-pin shaft, 10-outer cover, 11-second pin, 12-first 90-degree angle support member, 13-second 90-degree angle support member. DETAILED DESCRIPTION
[0015] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0018] The chemical composition of the multifunctional ratchet joint material for furniture, by weight, is as follows: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.13% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, with the remainder being Fe and unavoidable impurities. As can be understood, C is the most economical, fundamental, and effective strengthening element in steel, significantly enhancing its strength through solid solution strengthening and precipitation strengthening. However, excessive carbon content adversely affects the product's impact toughness, weldability, and hardness. Therefore, the present invention controls the carbon content to 0.48% to 0.54%. Si: A deoxidizing element that dissolves in ferrite to increase the steel's strength, but at the expense of ductility and toughness. The Si content in this invention is controlled to 0.21% to 0.25%. Mn: Manganese has a solid solution strengthening effect and can also lower the γ-α transformation temperature, thereby refining the ferrite grains. It is the most important and economical strengthening element, compensating for the strength loss caused by reduced C content. High manganese promotes the nucleation of acicular ferrite. A high Mn / C ratio can improve the steel's yield strength and impact toughness, lower the ductile-brittle transition temperature, refine the size of carbonitride precipitation, and promote precipitation strengthening. However, excessively high manganese content leads to severe segregation, which can easily result in high localized hardness values. Therefore, the manganese content in this invention is controlled to 0.61% to 0.65%. Cr: Effectively improves hardenability, inhibits the formation of polygonal ferrite and pearlite, and promotes the formation of ferrite or bainite with a large intragranular dislocation distribution in the medium and low temperature ranges. P and S: These are unavoidable impurity elements in steel. The lower the content, the better. However, excessively low levels increase production costs. Cr can significantly improve the tensile strength of the product, but also significantly increase the hardness, so it is not advisable to add too much. The chromium content of the present invention is controlled to be 0.13% to 0.19%. The present invention controls the mass fraction of Ni to be 0.01% to 0.05%, which has the positive effect: within the range of this mass fraction, its function is to increase the solubility of Cu, and at the same time, internal oxidation occurs to produce an irregular oxidation interface, inducing copper enrichment to migrate from the interface to the oxide layer, thereby inhibiting Cu enrichment and reducing surface defects. However, since Ni is expensive, considering its economic efficiency, it is not advisable to add too much. The present invention controls the mass fraction of Cu to be 0.02% to 0.06%, which has the positive effect: within this mass fraction range, the Cu element can generate refined Cu precipitates with precipitation strengthening effect, which is beneficial to ensure the strength of the steel.
[0019] Specifically, the chemical composition by weight percentage is: C: 0.50% to 0.52%, Si: 0.22% to 0.24%, Mn: 0.62% to 0.64%, P: 0.012% to 0.014%, S: 0.004% to 0.006%, Cr: 0.15% to 0.17%, Ni: 0.02% to 0.04%, Cu: 0.03% to 0.05%, and the rest is Fe and unavoidable impurities.
[0020] Specifically, the chemical composition by weight percentage is: C: 0.51%, Si: 0.23%, Mn: 0.63%, P: 0.013%, S: 0.005%, Cr: 0.16%, Ni: 0.03%, Cu: 0.04%, and the rest is Fe and unavoidable impurities.
[0021] Specifically, the present invention also provides a process for manufacturing a multifunctional ratchet joint for furniture, comprising the following steps: obtaining molten steel meeting the target composition through converter smelting; after tapping the converter, transporting the molten steel to an LF refining furnace for molten steel temperature control, desulfurization, alloy composition control, and calcium wire feeding treatment; continuously casting the molten steel after treatment in the refining furnace to obtain a continuously cast slab, wherein the chemical composition by weight of the continuously cast slab is as follows: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.1 3% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, and the remainder is Fe and inevitable impurities; the continuous casting slab is heated in a heating furnace and then hot rolled, and the continuous casting slab is fed into the heating furnace by a hot charging and hot delivery method, and the hot rolling is a two-stage rolling process, the rough rolling is a 6-pass continuous rolling process, and the rolling is performed above the austenite recrystallization temperature, and the finishing rolling is a 7-pass continuous rolling process; after finishing rolling, laminar cooling is performed using front-stage cooling, and the hot-rolled steel coil is obtained when the coiling temperature is 680-690°C; the hot-rolled steel coil is re-uncoiled, pickled, cold rolled once, annealed in a hood annealing furnace, and cold rolled twice to obtain a finished product of a multifunctional ratchet joint for ratchet joint furniture. Subsequently, the ratchet joint finished product (mainly including the first inner plate 1, the second inner plate 2, the opening spring 5, the first toothed rotating inner plate 7 and the second toothed rotating inner plate 8) can be obtained by shearing, grinding, punching and other processes on the ratchet joint furniture multifunctional ratchet joint finished product. Figure 1As shown, the multifunctional ratchet joint product structure of furniture includes a first inner plate 1, a second inner plate 2, a first pin 3, a right-angle rod 4, an opening spring 5, a movable buckle 6, a first toothed rotating inner plate 7, a second toothed rotating inner plate 8, a pin 9, an outer cover 10, a second pin 11, a first 90-degree angle support 12, and a second 90-degree angle support 13. The first 90-degree angle support 12 and the second 90-degree angle support 13 are respectively connected to the first toothed rotating inner plate 7 and the second toothed rotating inner plate 8 through the pin 9. The second pin 11 passes through the outer cover 10, the first toothed rotating inner plate 7, the first inner plate 1, the second inner plate 2 and the second toothed rotating inner plate 8 in sequence. The opening spring 5 and the movable buckle 6 are both installed on the inner side of the above-mentioned toothed rotating inner plate. The first inner plate 1 and the second inner plate 2 are both connected to the right-angle rod 4 through the first pin 3. The first inner plate 1 , the second inner plate 2 , the opening spring 5 , the first toothed rotating inner plate 7 and the second toothed rotating inner plate 8 are made of the above-mentioned material formula.
[0022] Specifically, the temperature of the continuous casting slab entering the heating furnace is 800-900°C, the heating temperature of the continuous casting slab is 1300-1400°C, the heating time is 160-170 minutes, the end temperature of the rough rolling is 1060-1090°C; the end temperature of the finishing rolling is 920-940°C.
[0023] It can be understood that the present invention has a reasonable design and unique structure. The multifunctional ratchet joint product for furniture produced by the furniture multifunctional ratchet joint manufacturing process of the present invention has greatly improved product quality and wear resistance. When used for a long time or subjected to large forces, there will be no quality problems such as slipping teeth, deformation, etc., and the wear resistance is relatively high.
[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.
Claims
1. A formula for a multifunctional ratchet joint material for furniture, characterized by: Its chemical composition in weight percentage is: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.13% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, and the rest is Fe and unavoidable impurities.
2. The multifunctional ratchet joint material for furniture according to claim 1, characterized in that: The chemical composition by weight percentage is as follows: C: 0.50% to 0.52%, Si: 0.22% to 0.24%, Mn: 0.62% to 0.64%, P: 0.012% to 0.014%, S: 0.004% to 0.006%, Cr: 0.15% to 0.17%, Ni: 0.02% to 0.04%, Cu: 0.03% to 0.05%, and the rest is Fe and unavoidable impurities.
3. The multifunctional ratchet joint material for furniture according to claim 1, characterized in that: The chemical composition by weight percentage is as follows: C: 0.51%, Si: 0.23%, Mn: 0.63%, P: 0.013%, S: 0.005%, Cr: 0.16%, Ni: 0.03%, Cu: 0.04%, and the rest is Fe and unavoidable impurities.
4. A process for manufacturing a multifunctional ratchet joint for furniture, comprising the following steps: Molten steel meeting the target composition is obtained through converter smelting; After tapping from the converter, the molten steel is transported to the LF refining furnace for temperature control, desulfurization, alloy composition control, and calcium line feeding. The molten steel treated in the refining furnace is subjected to slab continuous casting to obtain a continuous casting slab, characterized in that the chemical composition of the continuous casting slab is as follows by weight: C: 0.48% to 0.54%, Si: 0.21% to 0.25%, Mn: 0.61% to 0.65%, P: 0.011% to 0.015%, S: 0.002% to 0.008%, Cr: 0.13% to 0.19%, Ni: 0.01% to 0.05%, Cu: 0.02% to 0.06%, and the rest is F e and inevitable impurities; the continuous casting slab is heated in a heating furnace and then hot rolled, and the continuous casting slab is fed into the heating furnace by hot charging and hot delivery. The hot rolling is a two-stage rolling process, the rough rolling is 6 continuous rolling passes, and the rolling is above the austenite recrystallization temperature, and the finishing rolling is 7 continuous rolling passes; after finishing rolling, laminar cooling adopts front-stage cooling, and the hot-rolled steel coil is obtained when the coiling temperature is 680-690°C; the hot-rolled steel coil is re-uncoiled and subjected to pickling, primary cold rolling, annealing in a hood annealing furnace and secondary cold rolling to obtain a finished product of a multifunctional ratchet joint for ratchet joint furniture.
5. The process for manufacturing a multifunctional ratchet joint for furniture according to claim 4, characterized in that: The temperature of the continuous casting slab entering the heating furnace is 800-900° C., the heating temperature of the continuous casting slab is 1300-1400° C., and the heating time is 160-170 minutes.
6. The process for manufacturing a multifunctional ratchet joint for furniture according to claim 1, characterized in that: The rough rolling end temperature is 1060-1090°C; the finish rolling end temperature is 920-940°C.