Method for manufacturing a metal sheet-like ring

Abstract

The present application relates to a kind of metal sheet-like annular preparation method, belong to metallurgy and calendering processing field.The method of the present application includes preparation, obtains bar-shaped ingot by continuous casting, obtains round section wire through multi-pass drawing processing;Obtain trapezoidal section flat wire through special-shaped section drawing / rolling;Again, it is processed into spring-like flat wire by precision special rolling;Cutting obtains metal sheet-like annular product.The present application avoids the problems in the preparation process of traditional sheet-like annular product, can prepare size precision, surface clean, excellent and stable sheet-like annular material, can be applied to the preparation method of a variety of metal sheet-like annular material.The method process is simple, easy to operate, improves material utilization, improves material surface cleanliness, can be prepared size precision, surface clean, excellent sheet-like annular material, suitable for mass production.

Description

Technical Field

[0001] This invention relates to a method for preparing metal sheet-shaped circular rings. This method is mainly used for preparing metal brazing and functional material products, and belongs to the field of metallurgy and rolling processing. Background Technology

[0002] Brazing is a solid-state joining method that involves simultaneously heating a filler metal (below the melting point of the workpiece) and the workpiece to the filler metal's melting temperature, then using the liquid filler metal to fill the gaps in the solid workpiece to achieve a metal-to-metal connection. In brazing, the base material does not melt; only the filler metal melts, and the metallurgical connection is achieved through diffusion between the materials. This process requires a high degree of precision in the surface condition of the base material and the diffusion capacity between the base material and the filler metal. For the filler metal, precise filler metal quantity, good liquid flowability after melting, and a small solid-liquid phase difference are required. Precise filler metal quantity necessitates precise dimensional control. With the standardization and increasing precision of devices, filler metal is gradually moving towards pre-formed products, requiring it to move beyond conventional strips and wires and be prepared as finished products that can be directly assembled with devices. Furthermore, some functional materials, such as gaskets and sealing rings, are facing the same development trend.

[0003] The traditional method for manufacturing sheet-like rings involves first rolling the material to the required thickness to form a strip. Then, using a punch press with a die specifically designed for the desired product size, the strip is punched into a ring. This method has the following problems: 1. Low material utilization: The yield is generally between 8-15%, with a large amount of material becoming waste. Even with multi-specification ring punching, the yield is difficult to exceed 30%. Material costs are high. 2. Punching dies are generally designed and manufactured according to the required ring specifications, resulting in poor versatility. If other specifications are needed, the die must be changed, leading to high die costs. 3. Punching dies require continuous maintenance and repair; otherwise, the products are prone to earing or dimensional deviations. If these are not detected in time, batches of products will be scrapped. 4. The material preparation process is lengthy, resulting in decreased surface cleanliness of the material. Often, a cleaning process needs to be added at the end of the process before delivery.

[0004] Another method is to cut materials into products using laser or waterjet cutting. This method avoids mold making and can achieve a higher material yield. However, it also has drawbacks. For example, with laser cutting, the ablated surface of the cut is severely oxidized, which can lead to failure during material use and service. Waterjet cutting avoids ablation, but the equipment is expensive. Furthermore, both of these cutting methods are subtractive manufacturing processes, and the improvement in material yield is relatively limited. Summary of the Invention

[0005] The main objective of this invention is to provide a method for preparing sheet metal products. This method can be used to prepare metal brazing and functional material products with precise dimensions, high surface cleanliness, high material utilization, and high processing efficiency, which can greatly reduce the production cost of traditional sheet metal products.

[0006] This invention employs continuous casting, wire drawing, irregular cross-section drawing / rolling, and precision special rolling methods to avoid problems encountered in traditional sheet-like ring product manufacturing processes. It can produce sheet-like ring materials with precise dimensions, clean surfaces, and excellent and stable performance, and can be widely applied to the preparation of various metal sheet-like ring materials. This method is simple, easy to operate, improves material utilization, and enhances material surface cleanliness, resulting in sheet-like ring materials with accurate dimensions, clean surfaces, and excellent performance, suitable for mass production.

[0007] This invention involves preparing wire into a trapezoidal cross-section and then rolling it into a circular sheet of metal. Due to the principle of constant volume during plastic deformation of metal, the longer side of the trapezoidal flat wire becomes uniformly longer than the shorter side during the rolling process, thus forming an open ring. When the opening of the ring is used as a brazing material, the good fluidity of the melted filler metal will not affect the welding performance. When used as a functional material, if the opening affects its use, the ring can be butt-welded (e.g., laser welded) before use.

[0008] Compared to traditional methods, the sheet-like ring products prepared using this method have the following advantages: 1. Higher material utilization and reduced material costs. Shorter processing steps and higher efficiency, suitable for mass production of sheet-like rings; 2. Avoidance of stamping dies, only drawing dies with irregular cross-sections are needed. The price of drawing dies is 3%-10% of that of stamping dies, significantly reducing costs; 3. Shorter material processing flow, better surface cleanliness, no oxidation problems, and superior material performance.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A method for preparing sheet-like circular rings involves calculating the dimensions of the desired irregular cross-section based on the required product dimensions, thereby obtaining the dimensions of the desired wire. The required wire dimensions can then be prepared using conventional wire processing methods. The cross-sectional shape of the wire is gradually transformed from circular to rectangular and then trapezoidal before rolling to finally obtain the sheet-like circular ring product.

[0011] A method for preparing a metal sheet-like circular ring includes the following steps:

[0012] (1) Material preparation: Prepare raw materials and calculate the weight according to the mass percentage of the components of the metal sheet ring;

[0013] (2) Continuous casting: The material is melted and cast using continuous casting; the metal is melted and continuously cast into rod-shaped ingots using methods such as medium frequency induction melting.

[0014] (3) Wire drawing: The wire blank is drawn into a round wire through multiple drawing processes;

[0015] (4) Drawing / rolling of irregular cross sections: Based on the plastic deformation capacity and width-to-thickness ratio of the material, the round wire is processed into a rectangular cross section flat wire by drawing or rolling, and then processed into a trapezoidal cross section flat wire, or directly processed into a trapezoidal cross section flat wire.

[0016] (5) Precision special rolling: Utilizing the principle that the volume of metal deformation remains unchanged, trapezoidal cross-section flat wire is processed into spring-shaped flat wire by rolling.

[0017] (6) Cutting: Cut the rolled spring-shaped flat wire into metal sheet-shaped ring products.

[0018] In step (1), the metal sheet ring is made of metal or alloy, including Al, AuCu, AgCu, CuNi and NiCr alloy, etc.

[0019] In step (3), the deformation rate of a single pass in the wire drawing process is 5-50%, and the total deformation rate between two heat treatments is 20-80%.

[0020] In step (3), the diameter of the circular wire is calculated based on the size specifications of the sheet-shaped circular ring product.

[0021] The formula for calculating the diameter D0 of the circular wire is:

[0022]

[0023] Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, x1 is the cross-sectional shrinkage rate of processing the round wire into a rectangular cross-section flat wire, x2 is the cross-sectional shrinkage rate of processing the rectangular cross-section flat wire into a trapezoidal cross-section flat wire, x3... ′ The deformation rate for machining a trapezoidal cross-section flat wire into a sheet-like ring.

[0024] In step (4), the cross-sectional dimensions of the rectangular and trapezoidal flat lines are calculated based on the size specifications of the sheet-like circular ring product.

[0025] The formula for calculating the area p·q of the rectangular section of the flattened wire with rectangular cross-section is:

[0026]

[0027] Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, x2 is the section shrinkage rate of processing the rectangular cross-section flat wire into a trapezoidal cross-section flat wire, x3 ′ The deformation rate for machining a trapezoidal cross-section flat wire into a sheet-like ring is given by h, where h is the height of the trapezoidal cross-section of the trapezoidal cross-section flat wire.

[0028] The formulas for calculating the short side a, long side b, and height h of the trapezoidal cross-section flat wire are as follows:

[0029]

[0030] b = t / (1 - x3) ′ )

[0031] h=(Dd) / 2

[0032] Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, x1 is the cross-sectional shrinkage rate of processing the round wire into a rectangular cross-section flat wire, x2 is the cross-sectional shrinkage rate of processing the rectangular cross-section flat wire into a trapezoidal cross-section flat wire, x3... ′ The deformation rate for machining a trapezoidal cross-section flat wire into a sheet-like ring; a is the short side of the trapezoidal cross-section of the flat wire, b is the long side of the trapezoidal cross-section of the flat wire, and h is the height of the trapezoidal cross-section of the flat wire.

[0033] In step (4), the drawn round wire is subjected to single-pass irregular cross-section drawing process using a die; the irregular cross-section drawing die has an enlarged die inlet area to obtain better lubrication effect, the deformation zone angle is between 30 and 45° to reduce deformation resistance, and the sizing zone length is between 1.5 and 2 mm to obtain accurate finished product dimensions.

[0034] In step (5), precision special rolling: flat rolls are selected to ensure dimensional accuracy; the pressing is set according to the required thickness of the product, tension is used to straighten the wire after unwinding, and single-pass rolling is adopted, without multi-pass rolling. Before rolling, the front end is flattened to facilitate biting. At the take-up end, upper and lower pressure rollers are set near the rolls to clamp the flat wire, and tension is used to straighten the material to make the material deform evenly. Guide rollers or guide troughs are used for take-up, and a cored disc is used to collect the material to prevent material cross-linking.

[0035] The beneficial effects of this invention are:

[0036] The advantages of this method for preparing sheet-like ring products compared to traditional methods are as follows:

[0037] 1. High material utilization rate and reduced material costs. Except for the initial and final stages, all materials can be converted into products, with an average yield rate exceeding 90%. This significantly improves material utilization and reduces material waste. This is especially true for precious metal materials, leading to a substantial reduction in material costs.

[0038] 2. The processing steps are shorter and the efficiency is higher, making it suitable for mass production of sheet-like rings. The main equipment used in this invention are all conventional metal processing equipment, without any special or customized equipment, which is conducive to mass production and standardization. Furthermore, the method of this invention is simple and easy to operate, facilitating rapid commercialization of the results.

[0039] 3. The method eliminates the need for stamping dies; only drawing dies with irregular cross-sections are required. Since the price of drawing dies is only 3%-10% of that of stamping dies, auxiliary component costs are significantly reduced. Furthermore, the maintenance process for stamping dies is complex, core replacement is expensive, and dies can lead to batch scrap if problems occur. This method also saves on die maintenance costs. However, using the method of this invention, even if minor problems arise with the drawing die, such as slight dimensional deviations or minor scratches, these can be repaired during the subsequent rolling plastic deformation stage, reducing the production of defective products.

[0040] 4. The material processing flow is short and involves fewer steps, resulting in better surface cleanliness. Furthermore, the processing involves plastic processing and physical cutting, avoiding oxidation problems caused by the cutting process and ensuring the stability of the product in subsequent use and service. Attached Figure Description

[0041] Figure 1 This is a schematic diagram showing the dimensions of the product.

[0042] Figure 2 This is a schematic diagram of a trapezoidal cross-section of a flat wire;

[0043] Figure 3 This is a schematic diagram of the rolled product;

[0044] Figure 4 This is a schematic diagram of micro-region decomposition;

[0045] Figure 5 This is a schematic diagram showing the change in wire cross-section;

[0046] Figure 6 This is a schematic diagram of the mold structure;

[0047] Figure 7 This is a schematic diagram of precision special rolling. Detailed Implementation

[0048] The preparation method of the metal sheet-like ring of the present invention will be further described below with reference to specific preparation examples.

[0049] The specific calculation methods for the cross-sectional dimensions of round wire, rectangular and trapezoidal cross-section flat wire are as follows:

[0050] like Figure 1 The figure shows a schematic diagram of the dimensions of a sheet-like circular ring product, with an outer diameter of D, an inner diameter of d, and a thickness of t.

[0051] like Figure 2 The diagram shows a trapezoidal cross-section of a flat wire. The initial length of the wire before deformation is L0. The wire cross-section is trapezoidal, with the upper and lower bases denoted by a and b, respectively. a represents the shorter side (upper base) as the inner edge of the ring, and b represents the longer side (lower base) as the outer edge of the ring. The height of the trapezoid is denoted by h. Ignoring the width change during rolling, h also represents the width of the ring in the finished product. Therefore…

[0052] h=(Dd) / 2 Formula (1)

[0053] like Figure 3 The diagram shown is a schematic of a rolled sheet-like ring product. Assuming its cross-sectional shrinkage rate is x3, then the following formula applies:

[0054]

[0055] However, due to the larger deformation rate of the outer circle and the rolling process, to ensure that cracking does not occur during plastic deformation of the material, the deformation rate is set based on the outer circle in the process design. Let the rolling deformation rate based on the outer circle be x3. ′ .but,

[0056] x3 ′ =(bt) / b=1-t / b Equation (2)

[0057] like Figure 3 As shown, the rolled product is fan-shaped. Let the angle be α, the outer circle length be L, and the inner circle length be l. Then, we have...

[0058] L=α·D / 2 Equation (3)

[0059] l=α·d / 2 Equation (4)

[0060] At this point, the deformation within a small thickness Δh from the bottom is calculated, such as... Figure 4 As shown. When Δh is sufficiently small, the region can be considered as a rectangle for calculation.

[0061] Therefore, based on the principle that the volume remains unchanged before and after plastic deformation, it can be obtained in the micro-region near the lower base.

[0062] b·Δh·L0=t·Δh·L Equation (5)

[0063] Similarly, we can obtain the following in the micro-region near the upper bottom:

[0064] a·Δh·L0=t·Δh·l Equation (6)

[0065] Combining equations (3) and (6), we can obtain:

[0066]

[0067] According to equation (2),

[0068] b = t / (1 - x3) ′ Equation (8)

[0069] Substituting equation (8) into equation (7) yields the following:

[0070]

[0071] Based on the product dimensions, the values ​​of a, b, and h for each dimension of the irregular cross-section wire can be calculated using equations (1), (8), and (9). Then, the required diameter of the circular cross-section wire is calculated based on the values ​​for the irregular cross-section.

[0072] To ensure the uniformity and safety of material plastic deformation, prevent material cracking, and fully utilize its plastic deformation performance, the deformation process and parameters must be rationally designed. Therefore, the change in wire cross-section is as follows: Figure 5 As shown, the first step transforms the circular cross-section wire into a rectangle, and the second step transforms the rectangular cross-section into a trapezoidal cross-section. Let the initial wire diameter be D0, and after the first step of deformation, the length and width of the rectangle are p and q, respectively.

[0073] Therefore, the section shrinkage rate x1 of the first deformation can be obtained from equation (10).

[0074]

[0075] The cross-sectional shrinkage rate x2 of the second deformation can be obtained from equation (11).

[0076]

[0077] At this point, the corresponding reduction in area can be designed based on the material's plastic deformation capacity. However, when designing the deformation rate, it is important to ensure that the material can fill the mold during deformation, and that all material sections should deform to guarantee the dimensional accuracy and deformation stability of subsequent processing. Additionally, if the material has good plasticity, the rectangular section can be skipped, and the circular section can be directly deformed into a trapezoidal section.

[0078] Having already obtained the values ​​of a, b, and h, substituting them into equation (11) yields:

[0079]

[0080] Substituting equation (12) into equation (10) yields the following:

[0081]

[0082] Substituting the values ​​of a, b, and h into equation (13) yields the following:

[0083]

[0084] Therefore, the initial wire diameter D0 can be obtained based on the product dimensions and the settings of the three deformation rates and the cross-sectional shrinkage rate. Alternatively, based on the dimensions of the rectangular mold, p and q can be obtained first, followed by the cross-sectional shrinkage rate, to finally obtain the initial wire diameter D0.

[0085] After completing the calculation process, the required wire is prepared. This invention employs a method of continuous casting, wire drawing, irregular cross-section drawing / rolling, precision special rolling, and appropriate heat treatment, including the following steps:

[0086] (1) Material preparation: Prepare the required raw materials or alloys;

[0087] (2) Continuous casting: To ensure the smoothness of subsequent processing and avoid problems such as material failure and breakage, this invention adopts continuous casting for material melting and casting. The prepared raw materials or alloys are weighed according to the mass percentage of the alloy composition. After weighing, the material is placed in a continuous casting furnace, and medium-frequency induction melting or other suitable methods are used. After the metal is fully melted, it is continuously cast into rod-shaped ingots.

[0088] (3) Wire drawing: Calculate the required diameter of the circular cross-section wire for the circular sheet / ring product based on the required product size and specifications. Perform multiple drawing processes on the wire blank to the required wire diameter. The deformation rate of a single drawing process is 5-50%, and the total deformation rate between two heat treatments is 20-80%.

[0089] (4) Irregular Section Drawing / Rolling: Calculate the required rectangular and trapezoidal section dimensions for the circular sheet / ring product based on the desired dimensions. Select the drawing or rolling method and the number of passes based on the material's plastic deformation capacity and width-to-thickness ratio to process the material from a circular section wire into a rectangular or trapezoidal section flat wire. This step involves 1 or 2 passes depending on the material's plastic deformation capacity. If the material has good plastic deformation properties, it can be directly processed from a circular section wire into a trapezoidal section flat wire in one pass; if the plasticity is poor, it needs to be processed into a rectangular section first, and then into a trapezoidal section flat wire.

[0090] The drawn circular cross-section wire is then subjected to single-pass irregular cross-section drawing using a die. The irregular cross-section drawing die has an enlarged entry area, such as... Figure 6 In region I, the purpose of widening the inlet area is to enhance lubrication, allowing more lubricant to accumulate near the inlet area and improving lubrication performance. The deformation zone angle is between 30 and 45° to reduce deformation resistance, and the sizing zone length is between 1.5 and 2 mm to obtain accurate finished dimensions.

[0091] If the product has a large width-to-thickness ratio, or if the deformation resistance during the drawing process is too high, causing processing difficulties or material failure, rolling can be used. The circular cross-section wire is first rolled into a rectangular cross-section. This utilizes the principle of constant deformation volume in metals; the area of ​​the rectangular cross-section is equal to the area of ​​the circular cross-section. The required wire diameter is calculated, and the rolling thickness is controlled. Then, the rectangular and trapezoidal cross-section wires are drawn.

[0092] (4) Precision special rolling: Utilizing the principle that the volume of metal deformation remains constant, trapezoidal cross-section flat wire is processed into sheet-like rings through rolling. For example... Figure 7 As shown, the front end of the trapezoidal cross-section flat wire is flattened to facilitate biting. Flat rollers should be used to ensure dimensional accuracy. The pressing should be set according to the required thickness of the product, and tension should be used to straighten the wire during unloading, avoiding multiple rolling passes.

[0093] At the take-up end, upper and lower pressure rollers should be installed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material to prevent cross-linking.

[0094] (6) Cutting: According to the usage requirements, the rolled spring-shaped flat wire is cut into product rings.

[0095] The metal sheet-like rings in the following embodiments are prepared by the following method, specifically including the following steps:

[0096] Step 1: Raw material selection

[0097] Weigh the raw materials according to the mass percentage of each component.

[0098] Step 2: Continuous casting

[0099] 1) Medium-frequency melting furnace and vertical continuous casting machine;

[0100] 2) Accessories: high-quality graphite crucibles, alumina crucibles, and rod molds with a diameter of 8-16mm;

[0101] 3) Operation: Prepare and weigh the raw materials according to the required composition. Place the weighed raw materials into the crucible of the medium-frequency melting furnace and begin heating. The heating process should be slow, with the power increased in steps; do not directly adjust to high power. If vacuum casting is required, a vacuum must be drawn to ensure a vacuum degree ≤ 1.0 × 10⁻⁶. -1Pa. If non-vacuum casting is used, refining agents and covering agents need to be selected according to the type of metal.

[0102] Medium-frequency induction melting is used. After the metal is fully melted, it is refined for 3 to 5 minutes before casting begins, and finally cast into a continuous metal bar.

[0103] Step 3: Wire pulling

[0104] 1) Equipment: Vertical wire drawing machine;

[0105] 2) Accessories: Wire drawing die

[0106] 3) Operation: Calculate the required diameter of the circular cross-section wire needed to prepare the circular sheet / ring product based on the desired dimensions. Use a vertical wire drawing machine to gradually reduce the diameter of the ingot. The deformation rate per pass during drawing is 5-30%, and the total deformation rate between two heat treatments is 50-95%. The deformation rate should be set according to the material type, actual ingot size, and surface condition during processing. If the material is difficult to continue plastic deformation or surface defects such as cracks appear, processing should be stopped and heat treatment performed; refer to step 4 for details.

[0107] Step 4: Heat treatment

[0108] 1) Equipment: muffle furnace, vacuum heat treatment furnace;

[0109] 2) Operation: Place the material into the heat treatment furnace, close the furnace door, and begin heating. Based on the material type, set a suitable heat treatment process, including heat treatment temperature, holding time, heat treatment environment, and cooling method. After the material is removed, perform surface treatment to remove the oxide film from the metal surface.

[0110] Step 5: Drawing / rolling of irregular cross-sections

[0111] 1) Equipment: Vertical wire drawing machine or water tank wire drawing machine, both of which must be equipped with synchronous take-up device; finished product rolling mill or flat wire rolling mill, flat rolls;

[0112] 2) Accessories: Rectangular cross-section drawing dies, trapezoidal cross-section drawing dies

[0113] 3) Operation: Calculate the required rectangular and trapezoidal cross-sectional dimensions for preparing the circular sheet / ring product based on the desired dimensions. Use an irregularly shaped cross-section drawing die to draw the circular cross-section wire as a single filament. Polycrystalline dies are preferred; select the drawing lubrication method according to the material type. After drawing, mount the finished product onto the shaft.

[0114] Depending on the material's plastic deformation capacity, one or two passes can be set. If the material has good plastic deformation properties, it can be directly processed from a circular cross-section wire into a trapezoidal cross-section flat wire in one pass. If the plasticity is poor, it needs to be processed into a rectangular cross-section first, and then into a trapezoidal cross-section flat wire.

[0115] The drawn circular cross-section wire is then subjected to single-pass irregular cross-section drawing using a die. The irregular cross-section drawing die has an enlarged inlet area to achieve better lubrication, the deformation zone angle is between 30 and 45° to reduce deformation resistance, and the sizing zone length is between 1.5 and 2 mm to obtain accurate finished product dimensions.

[0116] If the product has a large width-to-thickness ratio, or if the deformation resistance during the drawing process is too high, causing processing difficulties or material failure, rolling can be used. The circular cross-section wire is first rolled into a rectangular cross-section. This utilizes the principle of constant deformation volume in metals; the area of ​​the rectangular cross-section is equal to the area of ​​the circular cross-section. The required wire diameter is calculated, and the rolling thickness is controlled. Then, the rectangular and trapezoidal cross-section wires are drawn.

[0117] If the material is difficult to continue plastic deformation or if defects such as surface cracking occur, processing should be stopped and heat treatment should be performed. Please refer to step 4 for details.

[0118] Step 6: Precision Special Rolling

[0119] 1) Equipment: Finished product rolling mill or flat wire rolling mill, flat rolls;

[0120] 2) Operation: Place the irregular cross-section wire take-up spool on the tension pay-off stand and flatten the front end of the wire to facilitate mill engagement. Continuously adjust the mill's pressure to ensure the thickness of the flat wire at the output end meets the product thickness requirements. Once the dimensions meet the requirements, remove the front-end trial material. Simultaneously observe the surface condition of the material. If defects such as cracks appear, processing should be stopped and heat treatment should be performed. Refer to step 4 for details.

[0121] After the material passes through the rolling mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material to prevent cross-linking. This step should be completed in one pass, without multiple rolling passes.

[0122] Step 7: Cutting

[0123] 1) Equipment: Cutting knife or shearing machine;

[0124] 2) Operation: According to the usage requirements, the rolled spring-shaped flat wire is cut into product rings.

[0125] Example 1:

[0126] The material is AgCu28 alloy, with Ag accounting for 72% by weight and Cu accounting for 28% by weight. The designed furnace capacity is 5.00 kg. The required product dimensions are ≠0.15 mm × Φ50 mm × Φ40 mm.

[0127] Due to the good plasticity of AgCu28, but to ensure the effectiveness of plastic deformation and the smooth completion of the processing, the deformation rate is set at 50% for all stages of irregular cross-section processing. Calculations show that the required diameter for the circular cross-section is 2.623 mm, and the required cross-sectional area for the rectangular section is 2.7 mm². 2 The trapezoidal cross-section has a long side of 0.3 mm, a short side of 0.24 mm, and a height of 5 mm. Based on the side length of the trapezoid and the area of ​​the rectangle, the value of p is determined to be 5.4 mm, and the value of q is determined to be 0.5 mm.

[0128] Preparation begins. Weigh out 3.6 kg of Ag and 1.4 kg of Cu, and place them separately into a vacuum induction melting furnace. Evacuate the furnace to 8.0 × 10⁻⁶. -2 The melting temperature was 931℃. After the metal was fully melted, it was refined for 3 minutes before continuous casting began. The casting speed was 2 mm / s, and a billet with a diameter of 10.0 mm was cast.

[0129] The prepared bar blanks were subjected to monofilament drawing, with a single-pass processing rate between 6.3% and 12.5%. When the wire blanks reached a diameter of 6.0 mm, they underwent heat treatment. The deformation rate between the two heat treatments was 64%. The heat treatment environment was vacuum, the temperature was 600℃, and the holding time was 2 hours, followed by furnace cooling. After exiting the furnace, the material surface was cleaned, and further plastic processing was performed to a wire blank with a diameter of 2.623 mm. The total deformation rate between the two heat treatments was 81%. Subsequently, vacuum heat treatment was performed at a temperature of 600℃ for 2 hours.

[0130] After exiting the furnace, the material surface is cleaned, and the circular cross-section wire is further plastically processed into a rectangular cross-section wire with dimensions of 5.4mm × 0.5mm using a drawing method. The front end of the wire is rolled into a flat wire for passing through the drawing die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, vacuum heat treatment is performed at a temperature of 600℃ for 2 hours.

[0131] After exiting the furnace, the material surface is cleaned, and the rectangular cross-section wire is further processed into a trapezoidal cross-section using a drawing method. The dimensions are 0.3 mm on the long side, 0.24 mm on the short side, and 5 mm in height. The front end of the wire is rolled to reduce its diameter so that it can pass through the die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, vacuum heat treatment is performed at a temperature of 600℃ for 2 hours.

[0132] After exiting the furnace, the material surface is cleaned. The irregular cross-section wire take-up spool is placed on the tension pay-off stand, and the front end of the wire is flattened to facilitate mill engagement. The mill pressure is continuously adjusted to ensure that the thickness of the flat wire at the exit end meets the product thickness requirements. Once the dimensions meet the requirements, the front-end trial-rolled material is removed. After the material passes through the mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material.

[0133] The material is placed on a cutting machine to cut the rolled product into open-faced rings. In the relaxed state, the dimensions of the finished product are as follows: thickness 0.147mm, 0.148mm, 0.147mm; inner diameter 40.09mm, 40.07mm, 40.07mm; outer diameter 50.05mm, 50.06mm, 50.05mm. The dimensions meet the usage requirements, and the surface is clean, free from oxidation, dirt, cracks, and other defects. The finished product weighs 4.82kg, with a yield rate of 96.40%.

[0134] Example 2:

[0135] The material is AuCu20 alloy, with Au accounting for 80% by weight and Cu accounting for 20% by weight. The designed furnace capacity is 2.00 kg. The required product dimensions are ≠0.1 mm × Φ38 mm × Φ30 mm.

[0136] Due to the good plasticity of AuCu20, but still requiring in-process heat treatment, and to ensure the absence of ordered phases and the effectiveness of plastic deformation, quenching is necessary. To ensure smooth processing, the deformation rate is set at 50% for each stage of irregular cross-section processing. Calculations indicate that the required diameter for the circular cross-section is 1.910 mm, and the rectangular cross-sectional area is 1.4 mm². 2 The trapezoidal cross-section has a long side of 0.2 mm, a short side of 0.16 mm, and a height of 4 mm. Based on the side length of the trapezoid and the area of ​​the rectangle, the value of p is determined to be 4.5 mm, and the value of q is determined to be 0.31 mm.

[0137] Preparation begins. Weigh out 1.6 kg of Au and 0.4 kg of Cu, and place them separately into a vacuum induction melting furnace. Evacuate the furnace to a vacuum level of 6.0 × 10⁻⁶.-2 Pa, melting temperature 1030℃, after the metal is fully melted, it is refined for 3 minutes before continuous casting begins. The casting speed is 1mm / s, and a billet with a diameter of 8.0mm is cast.

[0138] The prepared bar billets were subjected to single-wire drawing, with a single-pass processing rate between 5.7% and 10.4%. When the billets reached a diameter of 5.0 mm, they underwent heat treatment, with a deformation rate of 61% between the two heat treatments. The heat treatment environment was vacuum, the temperature was 700℃, the holding time was 1 hour, and water quenching followed. After removal from the furnace, the material surface was cleaned. Plastic processing continued until the wire diameter reached 3.0 mm, followed by vacuum heat treatment using the same process as above, with a deformation rate of 64% between the two heat treatments. Plastic processing continued until the billets reached a diameter of 1.910 mm, with a total deformation rate of 59% between the two heat treatments. Then, vacuum heat treatment was performed at a temperature of 600℃ for 2 hours, followed by water quenching.

[0139] After exiting the furnace, the material surface is cleaned, and the circular cross-section wire is further plastically processed into a rectangular cross-section wire using a drawing method. The rectangular dimensions are 4.5mm × 0.31mm. The front end of the wire is rolled into a flat wire for passing through the drawing die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, vacuum heat treatment is performed at 600℃ for 1 hour, followed by water quenching.

[0140] After exiting the furnace, the material surface is cleaned, and the rectangular cross-section wire is further processed into a trapezoidal cross-section using a drawing method. The trapezoidal cross-section has a long side of 0.2 mm, a short side of 0.16 mm, and a height of 4 mm. The front end of the wire is rolled to reduce its diameter so that it can pass through the die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, vacuum heat treatment is performed at 600℃ for 1 hour, followed by water quenching.

[0141] After exiting the furnace, the material surface is cleaned. The irregular cross-section wire take-up spool is placed on the tension pay-off stand, and the front end of the wire is flattened to facilitate mill engagement. The mill pressure is continuously adjusted to ensure that the thickness of the flat wire at the exit end meets the product thickness requirements. Once the dimensions meet the requirements, the front-end trial-rolled material is removed. After the material passes through the mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material.

[0142] The material is placed on a cutting machine to cut the rolled product into open-faced rings. In the relaxed state, the dimensions of the finished product are as follows: thickness 0.101mm, 0.100mm, 0.099mm; inner diameter 30.03mm, 30.01mm, 30.03mm; outer diameter 37.95mm, 37.98mm, 37.99mm. The dimensions meet the usage requirements, and the surface is clean, free from defects such as oxidation, dirt, and cracks. The finished product weighs 1.85kg, with a yield rate of 92.50%.

[0143] Example 3:

[0144] The material is CuNi25 alloy, with Cu accounting for 75% by weight and Ni accounting for 25% by weight. The designed furnace capacity is 10.00 kg. The required product dimensions are ≠0.3 mm × Φ100 mm × Φ88 mm.

[0145] Due to the generally limited plastic deformation capacity of CuNi25, but to ensure effective plastic deformation and smooth processing, a deformation rate of 30% was set for each stage of irregular cross-section processing. Calculations determined that the required diameter for the circular cross-section is 2.507 mm, and the required cross-sectional area for the rectangular section is 3.45 mm². 2 The trapezoidal cross-section has a long side of 0.43 mm, a short side of 0.38 mm, and a height of 6 mm. Based on the side length of the trapezoid and the area of ​​the rectangle, the value of p is determined to be 6.3 mm, and the value of q is determined to be 0.55 mm.

[0146] Preparation begins. Weigh out 7.5 kg of Cu and 2.5 kg of Ni, and place them separately into a vacuum induction melting furnace. Evacuate the furnace to 5.0 × 10⁻⁶. -1 The melting temperature was 1331℃. After the metal was fully melted, it was refined for 3 minutes before continuous casting began. The casting speed was 2 mm / s, and a billet with a diameter of 8.0 mm was cast.

[0147] The obtained bar blanks are subjected to monofilament drawing with a single-pass processing rate between 6.0% and 8.5%. When the wire blank reaches a diameter of 6.0 mm, it undergoes heat treatment, with a deformation rate of 44% between the two heat treatments. The heat treatment environment is vacuum, the temperature is 800℃, and the holding time is 2 hours, followed by furnace cooling. After furnace removal, the material surface is cleaned. Further processing continues until the wire blank reaches a diameter of 4.5 mm, followed by vacuum heat treatment, with a deformation rate of 44% between the two heat treatments. The heat treatment process is the same as above. After furnace removal, the material surface is cleaned. Further processing continues until the wire blank reaches a diameter of 3.5 mm, followed by vacuum heat treatment, with a deformation rate of 40% between the two heat treatments. The heat treatment process is the same as above. Further processing continues until the wire blank reaches a diameter of 2.8 mm, followed by vacuum heat treatment, with a deformation rate of 36% between the two heat treatments. The heat treatment process is the same as above. Continued plastic processing continues until the wire blank reaches a diameter of 2.507 mm, with a total deformation rate of 20% between the two heat treatments. Then, vacuum heat treatment is performed at a temperature of 700℃ for 2 hours.

[0148] After exiting the furnace, the material surface is cleaned, and then rolled into rectangular cross-section wire. The rectangle dimensions are 6.3mm × 0.55mm. During the rolling process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After rolling, the wire is wound onto a spool. Then, vacuum heat treatment is performed at 700℃ for 1 hour.

[0149] After exiting the furnace, the material surface is cleaned, and the rectangular cross-section wire is further processed into a trapezoidal cross-section using a drawing method. The trapezoidal cross-section has a long side of 0.43 mm, a short side of 0.38 mm, and a height of 6 mm. The front end of the wire is rolled to reduce its diameter so that it can pass through the die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, vacuum heat treatment is performed at a temperature of 700℃ for 1 hour.

[0150] After exiting the furnace, the material surface is cleaned. The irregular cross-section wire take-up spool is placed on the tension pay-off stand, and the front end of the wire is flattened to facilitate mill engagement. The mill pressure is continuously adjusted to ensure that the thickness of the flat wire at the exit end meets the product thickness requirements. Once the dimensions meet the requirements, the front-end trial-rolled material is removed. After the material passes through the mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material.

[0151] The material is placed on a cutting machine to cut the rolled product into open-faced rings. In the relaxed state, the dimensions of the finished product are as follows: thickness 0.302mm, 0.302mm, 0.301mm; inner diameter 88.05mm, 88.06mm, 88.06mm; outer diameter 100.09mm, 100.10mm, 100.08mm. The dimensions meet the usage requirements, and the surface is clean, free from defects such as oxidation, dirt, and cracks. The finished product weighs 9.35kg, with a yield rate of 93.50%.

[0152] Example 4:

[0153] The material is high-purity aluminum, requiring no additional batching. The designed furnace capacity is 5.00 kg. The required product dimensions are ≠0.5 mm × Φ20 mm × Φ10 mm.

[0154] Due to the excellent plasticity of high-purity aluminum, to ensure the effectiveness of plastic deformation and the smooth completion of the processing, the deformation rate is set at 50% for all stages of irregular cross-section processing. Calculations show that the required diameter for the circular cross-section is 4.37 mm, and the required cross-sectional area for the rectangular section is 7.5 mm². 2 The trapezoidal cross-section has a long side of 1mm, a short side of 0.5mm, and a height of 5mm. Based on the side length of the trapezoid and the area of ​​the rectangle, the value of p is determined to be 5.5mm, and the value of q is determined to be 1.36mm.

[0155] Preparation begins. 5 kg of Al is weighed and placed into a medium-frequency induction melting furnace. The melting temperature is 751℃. After the metal is fully melted, it is refined for 3 minutes before continuous casting begins. The casting speed is 2 mm / s, resulting in a billet with a diameter of 10.0 mm.

[0156] The obtained bar blank is drawn into a single wire with a single pass processing rate between 8.5% and 15.5% to produce a wire blank with a diameter of 4.37 mm. Then, it is heat treated at a temperature of 300℃ for 2 hours.

[0157] After being removed from the furnace, the material surface is cleaned, and the circular cross-section wire is further plastically processed into a rectangular cross-section wire using a drawing method. The rectangular dimensions are 5.5mm × 1.36mm. The front end of the wire is rolled into a flat wire for passing through the drawing die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, heat treatment is performed at 300℃ for 2 hours.

[0158] After exiting the furnace, the material surface is cleaned, and the rectangular cross-section wire is further processed into a trapezoidal cross-section using a drawing method. The trapezoidal cross-section has a long side of 1mm, a short side of 0.5mm, and a height of 5mm. The front end of the wire is rolled to reduce its diameter so that it can pass through the die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, heat treatment is performed at 300℃ for 2 hours.

[0159] After exiting the furnace, the material surface is cleaned. The irregular cross-section wire take-up spool is placed on the tension pay-off stand, and the front end of the wire is flattened to facilitate mill engagement. The mill pressure is continuously adjusted to ensure that the thickness of the flat wire at the exit end meets the product thickness requirements. Once the dimensions meet the requirements, the front-end trial-rolled material is removed. After the material passes through the mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material.

[0160] The material is placed on a cutting machine to cut the rolled product into open-faced rings. In the relaxed state, the dimensions of the finished product are as follows: thickness 0.507mm, 0.505mm, 0.505mm; inner diameter 10.05mm, 10.03mm, 10.05mm; outer diameter 20.01mm, 20.02mm, 20.02mm. The dimensions meet the usage requirements, and the surface is clean, free from defects such as oxidation, dirt, and cracks. The finished product weighs 4.77kg, with a yield rate of 95.40%.

[0161] Example 5:

[0162] The material is NiCr20 alloy, with Ni accounting for 80% by weight and Cr accounting for 20% by weight. The designed furnace capacity is 5.00 kg. The required product dimensions are ≠0.2 mm × Φ120 mm × Φ100 mm.

[0163] Due to the generally low plasticity of NiCr20, a deformation rate of 30% was set to ensure effective plastic deformation and smooth processing. Calculations determined that the required diameter of the circular cross-section is 2.61 mm, and the required cross-sectional area of ​​the rectangle is 3.74 mm². 2 The trapezoidal cross-section has a long side of 0.29 mm, a short side of 0.24 mm, and a height of 10 mm. Based on the side length of the trapezoid and the area of ​​the rectangle, the value of p is determined to be 10.2 mm, and the value of q is 0.36 mm.

[0164] Preparation begins. Weigh out 4 kg of Ni and 1 kg of Cr, and place them separately into a vacuum induction melting furnace. Evacuate the furnace to a vacuum level of 9.0 × 10⁻⁶. -1The melting temperature was 1530℃. After the metal was fully melted, it was refined for 5 minutes before continuous casting began. The casting speed was 2 mm / s, and a billet with a diameter of 8.0 mm was cast.

[0165] The prepared bar blanks were subjected to monofilament drawing, with a single-pass processing rate between 5.5% and 10.5%. When the wire blanks reached a diameter of 5.0 mm, they underwent vacuum heat treatment. The deformation rate between the two heat treatments was 61%. The heat treatment environment was vacuum, the temperature was 1300℃, and the holding time was 2 hours, followed by furnace cooling. After furnace removal, the material surface was cleaned. Plastic processing continued until the wire blanks reached a diameter of 3 mm, with a total deformation rate of 64% between the two heat treatments. Vacuum heat treatment was then performed at 1300℃ for 2 hours. Plastic processing continued until the wire blanks reached a diameter of 2.61 mm, with a total deformation rate of 24% between the two heat treatments. Vacuum heat treatment was then performed again at 1300℃ for 2 hours.

[0166] After exiting the furnace, the material surface is cleaned, and the circular cross-section wire is plastically processed into a rectangular cross-section wire using a rolling method. The dimensions of the rectangle are 10.2mm × 0.36mm. During the rolling process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After rolling, the wire is wound onto a spool. Then, heat treatment is performed at a temperature of 600℃ for 2 hours.

[0167] After exiting the furnace, the material surface is cleaned, and the rectangular cross-section wire is further processed into a trapezoidal cross-section using a drawing method. The trapezoidal cross-section has a long side of 0.29 mm, a short side of 0.24 mm, and a height of 10 mm. The front end of the wire is rolled to reduce its diameter so that it can pass through the die. During the drawing process, lubrication and wire surface quality are constantly monitored to ensure uniform plastic deformation and material surface quality. After drawing, the wire is wound onto a spool. Then, heat treatment is performed at a temperature of 1300℃ for 2 hours.

[0168] After exiting the furnace, the material surface is cleaned. The irregular cross-section wire take-up spool is placed on the tension pay-off stand, and the front end of the wire is flattened to facilitate mill engagement. The mill pressure is continuously adjusted to ensure that the thickness of the flat wire at the exit end meets the product thickness requirements. Once the dimensions meet the requirements, the front-end trial-rolled material is removed. After the material passes through the mill, upper and lower pressure rollers are placed near the rolls to clamp the flat wire, using tension to straighten the material and ensure uniform deformation. Guide rollers or guide troughs should be used for take-up, and a cored disc should be used to collect the material.

[0169] The material is placed on a cutting machine to cut the rolled product into open-ended circular rings. In the relaxed state, the dimensions of the finished product are as follows: thickness 0.197mm, 0.200mm, 0.200mm; inner diameter 100.09mm, 100.08mm, 100.08mm; outer diameter 120.08mm, 120.07mm, 120.07mm. The dimensions meet the usage requirements, and the surface is clean, free from oxidation, dirt, cracks, and other defects. The finished product weighs 4.62kg, with a yield rate of 92.40%.

[0170] The dimensions of the ring materials prepared in Examples 1-5 are summarized in Table 1.

[0171] Table 1

[0172]

[0173] Thickness testing was performed using a micrometer, while the inner and outer diameters were measured using vernier calipers with the cut ring placed horizontally on a table. The tolerance for high-precision thickness is typically ±5%, and the tolerance for inner and outer diameters is typically ±0.1mm. Therefore, all the above dimensions meet the usage requirements, and the finished metal rings have clean surfaces free from defects such as cracks, oil stains, and oxidation. In the above embodiments, the material utilization rate exceeds 90%, and the material processing flow is short, resulting in less oxidation and lubrication residue, and better material cleanliness and purity. Furthermore, the method involved in this invention can significantly improve yield and processing efficiency while reducing costs.

[0174] This invention includes material preparation, continuous casting to obtain a rod-shaped ingot, multi-pass drawing to obtain a circular cross-section wire; drawing / rolling a trapezoidal cross-section flat wire to obtain a trapezoidal cross-section flat wire; further precision special rolling to form a spring-shaped flat wire; and cutting to obtain a metal sheet-like circular ring product. This invention prepares the wire into a trapezoidal cross-section flat wire, and then uses rolling to produce metal sheet-like circular products. Due to the principle of constant volume during plastic deformation of metals, the longer side of the trapezoidal cross-section flat wire is uniformly longer than the shorter side during deformation, thus forming a spring-shaped flat wire, which is then cut to produce an open circular ring product. This invention avoids the problems encountered in traditional sheet-like ring product preparation processes, and can produce sheet-like ring materials with precise dimensions, clean surfaces, and excellent and stable performance. It can be widely applied to the preparation methods of various metal sheet-like ring materials. This method is simple, easy to operate, improves material utilization, and enhances material surface cleanliness, producing sheet-like ring materials with accurate dimensions, clean surfaces, and excellent performance, suitable for mass production.

[0175] The above embodiments only illustrate some of the embodiments of the metal material sheet ring and its preparation method of the present invention. In the above technical solutions of the present invention, the material composition content, size specifications, processing deformation rate and other parameters can be freely selected within a certain range, and will not be listed one by one here. Therefore, the technical solutions contained in the above description should be regarded as illustrative and not used to limit the scope of protection of the patent application of the present invention.

Claims

1. A method for preparing a metal sheet-like circular ring, comprising the following steps: (1) Material preparation: Prepare raw materials and calculate the weight according to the mass percentage of the components of the metal sheet ring; (2) Continuous casting: The material is melted and cast using continuous casting; medium frequency induction melting is used to melt the metal completely and then continuously cast it into rod-shaped ingots; (3) Wire drawing: The wire blank is drawn into a circular cross-section wire through multiple drawing processes; the diameter of the circular cross-section wire is calculated based on the size specifications of the sheet-shaped ring product; The formula for calculating the diameter D0 of the circular cross-section wire is as follows: Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, x1 is the cross-sectional shrinkage rate of processing the round wire into a rectangular cross-section flat wire, x2 is the cross-sectional shrinkage rate of processing the rectangular cross-section flat wire into a trapezoidal cross-section flat wire, and x3′ is the deformation rate of processing the trapezoidal cross-section flat wire into a sheet ring. (4) Irregular cross-section drawing / rolling: Based on the plastic deformation capacity and width-to-thickness ratio of the material, drawing or rolling is used to process the round wire into a rectangular cross-section flat wire, and then into a trapezoidal cross-section flat wire, or directly into a trapezoidal cross-section flat wire; the cross-sectional dimensions of the rectangular and trapezoidal cross-section flat wires are calculated based on the size specifications of the sheet-like circular ring products; (5) Precision special rolling: Utilizing the principle that the volume of metal deformation remains unchanged, trapezoidal cross-section flat wire is processed into spring-shaped flat wire by rolling. (6) Cutting: Cut the rolled spring-shaped flat wire into metal sheet-shaped ring products.

2. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: The deformation rate in a single pass of wire drawing is 5-50%, and the total deformation rate between two heat treatments is 20-80%.

3. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: The formula for calculating the area p·q of the rectangular section of the flattened wire with rectangular cross-section is: Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, x2 is the section shrinkage rate of processing the rectangular cross-section flat wire into the trapezoidal cross-section flat wire, x3′ is the deformation rate of processing the trapezoidal cross-section flat wire into the sheet ring, and h is the height of the trapezoidal cross-section flat wire.

4. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: The formulas for calculating the short side a, long side b, and height h of the trapezoidal cross-section flat wire are as follows: b = t / (1-x3′) h=(Dd) / 2 Where: D is the outer diameter of the metal sheet ring product, d is the inner diameter of the metal sheet ring product, t is the thickness of the metal sheet ring product, and x3′ is the deformation rate of processing the trapezoidal cross-section flat wire into a sheet ring.

5. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: The drawn round wire is subjected to single-pass drawing with a special-shaped cross-section die; the entrance area of ​​the special-shaped cross-section die is increased, the deformation zone angle is between 30 and 45°, and the sizing zone length is between 1.5 and 2 mm.

6. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: In precision special rolling, flat rolls are selected; the pressing is set according to the required thickness of the product, tension is used for wire straightening, and single-pass rolling is adopted.

7. The method for preparing a metal sheet-like circular ring according to claim 6, characterized in that: Before rolling, the front end is flattened; at the take-up end, upper and lower pressure rollers are set near the rolls to clamp the flat wire, and tension is used to straighten the material so that the material is deformed evenly; guide rollers or guide troughs are used for take-up, and a cored disc is used to collect the material.

8. The method for preparing a metal sheet-like circular ring according to claim 1, characterized in that: The sheet-like ring is made of metal or alloy, including Al, AuCu, AgCu, CuNi and NiCr alloys.

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