Metal rubber blank and preparation method thereof and metal rubber molded part

Abstract

The present invention provides a metal rubber blank and a preparation method thereof and a metal rubber molded part, and relates to the field of metal rubber technology. The preparation method limits some detailed parameters (such as the winding height of the spiral winding on the mandrel, etc.) during the preparation of the metal rubber blank and sets the winding nodes, so that the hooking / meshing between the metal wires inside the prepared metal rubber blank is consistent, the tightness between the blank and the mandrel is consistent, and the same tension is maintained, which provides a good foundation for the subsequent preparation of the metal rubber molded part. The present invention also provides a metal rubber molded part, which is made using the above-mentioned metal rubber blank. In view of the advantages of the above-mentioned metal rubber blank, the metal rubber molded part made therefrom has good stiffness and damping performance.

Description

Technical Field

[0001] The invention relates to the technical field of metal rubber, and in particular to a metal rubber blank and a preparation method thereof, and a metal rubber molded part. Background Art

[0002] Metal rubber material is a homogeneous elastic porous substance. Through a special process, a certain mass of stretched, spiral metal wires are orderly arranged in a stamping or rolling mold, and then pressed into shape by cold stamping and necessary heat treatment processes. It is named metal rubber because it exhibits elasticity and damping properties similar to rubber materials while maintaining the appearance and behavior of metal.

[0003] The internal structure of metal rubber material is a spatial network structure similar to the rubber polymer structure formed by the interlaced metal wires. It can dissipate a large amount of energy and play a damping role when subjected to vibration displacement. Because it is actually metal rather than rubber, metal rubber products have the advantages of high bearing capacity, large damping, vibration reduction in a wider frequency band, impact resistance and oil resistance, corrosion resistance, high and low temperature resistance, moisture resistance, aging resistance, non-volatility, easy maintenance, and can be made into various structural shapes as needed. It is particularly suitable for the preparation of aerospace, national defense, machinery, transportation and other components under special working conditions for damping vibration reduction, impact protection, filtering, sealing, noise control and heat conduction. It can be used in spacecraft and other components with special requirements where traditional rubber materials cannot be used, to complete tasks that spring isolators and rubber vibration reduction, buffering and damping elements cannot undertake and complete.

[0004] In the preparation process of metal rubber, more attention is usually paid to stamping the metal rubber blank into metal rubber, while less attention is paid to the weaving process of the metal rubber blank. Different metal rubber blank weaving processes will lead to differences in the performance of the metal rubber. For example, the connection / meshing between the internal metal wires is inconsistent, the tightness and tension of the blank and the mandrel are different, which may cause the metal rubber structure to be loose and difficult to form during stamping, affecting the stiffness and damping performance of the metal rubber.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing a metal rubber blank. The metal rubber blank prepared by the preparation process has the same hooking / engaging conditions between the metal wires inside, the same tightness between the blank and the core shaft, and the same tension is maintained; the prepared metal rubber has good stiffness, damping performance and good performance in coping with bearing forces in different directions.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The first object of the present invention is to provide a method for preparing a metal rubber blank, comprising the following steps:

[0009] S1. Providing a spiral coil made of a metal wire;

[0010] S2. Determine the total mass m0 of the required spiral roll according to the preset density ρ and size V of the metal rubber molded part;

[0011] S3. n winding nodes are set on the mandrel. According to the winding angle θ of the spiral winding on the mandrel and the diameter D of the mandrel, the height h1 of any two adjacent winding nodes is determined to be D×tanθ. Then, the total winding height h0 of the spiral winding on the mandrel meets the following formulas (1) and (2):

[0012] h0 = (n-1) × h1 (1)

[0013] A1 × m0≤h0≤A2 × m0 (2)

[0014] Wherein, h0 is the total winding height of the spiral roll on the mandrel, in cm; h1 is the height of any two adjacent winding nodes on the mandrel, in cm; n is the number of winding nodes on the mandrel, n is an integer and n≥2; A1 and A2 are both winding coefficients, A1 is 0.2, A2 is 0.25, in cm / g; m0 is the total mass of the spiral roll, in g;

[0015] S4. Wind the spiral roll along the trajectory of the winding node on the core shaft to obtain a metal rubber blank.

[0016] Further, based on the above technical solution of the present invention, in step S1, according to the winding angle θ of the spiral coil on the mandrel, the following formula (3) is used to determine the pitch P of the spiral coil:

[0017] P = (θ-15°) / B (3)

[0018] Wherein, P is the pitch of the spiral coil, in mm; θ is the winding angle, in degrees; B is the pitch coefficient, which is 10, in degrees / mm.

[0019] Furthermore, based on the above technical solution of the present invention, in step S1, the pitch and diameter of the spiral coil are the same.

[0020] Further, based on the above technical solution of the present invention, in step S1, the pitch and diameter of the spiral coil are 1.5-4.5 mm;

[0021] And / or, the diameter of the metal wire is 0.15-0.3 mm.

[0022] Further, based on the above technical solution of the present invention, in step S2, the total mass of the spiral coil required is m0=ρ×V.

[0023] Further, based on the above technical solution of the present invention, in step S1 and step S3, the winding angle of the spiral roll on the core shaft is 30 to 60 degrees, preferably 45 degrees.

[0024] Further, on the basis of the above technical solution of the present invention, in step S4, the winding process includes: firstly winding the spiral coil from bottom to top along the trajectory of the winding node in the same inclined direction, then winding the spiral coil from top to bottom along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross winding in sequence to obtain the metal rubber blank;

[0025] Furthermore, on the basis of the above technical solution of the present invention, in step S4, the winding process includes: firstly winding the spiral roll from top to bottom along the trajectory of the winding node in the same inclined direction, and then winding the spiral roll from bottom to top along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross-winding in sequence to obtain the metal rubber blank.

[0026] The second object of the present invention is to provide a metal rubber blank, which is made by the preparation method of the metal rubber blank provided by the first object of the present invention.

[0027] The third object of the present invention is to provide a metal rubber molded part, which is made of the metal rubber blank provided by the second object of the present invention;

[0028] Preferably, the core shaft is removed from the metal rubber blank, and then stamping is performed to obtain the metal rubber.

[0029] Compared with the prior art, the technical solution of the present invention has at least the following technical effects:

[0030] (1) The present invention provides a method for preparing a metal rubber blank. By setting detailed parameters such as the winding height of the spiral roll on the core shaft and the winding nodes during the preparation of the metal rubber blank, the spiral roll can achieve good winding accuracy during the winding process along the core shaft, so that the hooking / meshing between the metal wires inside the prepared metal rubber blank is consistent, the tightness between the blank and the core shaft is consistent, and the same tension is maintained, providing a good foundation for the subsequent preparation of metal rubber molded parts.

[0031] (2) The present invention provides a metal rubber molded part, which is made by the preparation method of the metal rubber blank provided by the present invention. In view of the advantages of the metal rubber blank, the metal rubber molded part made therefrom has good stiffness, damping performance and good performance in coping with bearing forces in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0033] Figure 1 It is a schematic diagram of winding nodes on the mandrel of the present invention;

[0034] Figure 2 This is a schematic diagram of a spiral coil with a winding angle of 45° according to the present invention;

[0035] Figure 3 A schematic diagram of a winding method of a spiral roll according to an embodiment of the present invention;

[0036] Figure 4 This is a physical picture of the metal rubber molded part obtained in Example 1 of the present invention;

[0037] Figure 5 This is a physical picture of the metal rubber molded part produced in Example 5 of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention. The process parameters of the following embodiments that do not specify specific conditions are usually based on conventional conditions.

[0039] The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in the present invention.

[0040] According to a first aspect of the present invention, there is provided a method for preparing a metal rubber blank, comprising the following steps:

[0041] S1. Providing a spiral coil made of a metal wire;

[0042] S2. Determine the total mass m0 of the required spiral roll according to the preset density ρ and size V of the metal rubber molded part;

[0043] S3. Set n winding nodes on the mandrel, as follows Figure 1 As shown, according to the winding angle θ of the spiral winding on the core shaft and the diameter D of the core shaft, the height of any two adjacent winding nodes is determined as h1=D×tanθ, and the total winding height h0 of the spiral winding on the core shaft meets the following formulas (1) and (2):

[0044] h0 = (n-1) × h1 (1)

[0045] A1 × m0≤h0≤A2 × m0 (2)

[0046] Wherein, h0 is the total winding height of the spiral roll on the mandrel, in cm; h1 is the height of any two adjacent winding nodes on the mandrel, in cm; n is the number of winding nodes on the mandrel, n is an integer and n≥2; A1 and A2 are both winding coefficients, A1 is 0.2, A2 is 0.25, in cm / g; m0 is the total mass of the spiral roll, in g;

[0047] S4. Wind the spiral roll along the trajectory of the winding node on the core shaft to obtain a metal rubber blank.

[0048] Specifically, the specific method of winding the metal wire into a spiral coil in step S1 is not limited, and a winding method commonly used in the art can be used.

[0049] In step S2, the total mass m0 of the spiral roll can be calculated by the preset density ρ and size V of the metal rubber molded part, that is, m0=ρ×V.

[0050] In step S3, the setting of the winding nodes is conducive to easier control of the winding angle, making the winding angle more accurate. It should be noted that the winding nodes only divide the total winding height h0 of the spiral winding on the mandrel into multiple areas, and the distance between any two adjacent winding nodes is the winding height h1, and no additional components are required to be set at the winding nodes of the mandrel. Figure 1 The winding nodes in are only for illustration.

[0051] At the same time, the inventors have found through a lot of practice that when the total winding height h0 of the spiral roll on the mandrel and the total mass m0 of the spiral roll meet the following relationship: A1×m0≤h0≤A2×m0 or A1≤h0 / m0≤A2, and A1 and A2 are both winding coefficients, A1 is 0.2cm / g, and A2 is 0.25cm / g (empirical value), a more suitable total winding height of the spiral roll can be obtained. Using this winding height is conducive to the stamping of the metal rubber blank, and the metal rubber prepared by stamping has better performance.

[0052] The preparation method of the metal rubber blank provided by the present invention limits some detailed parameters (such as the total winding height of the spiral roll on the core shaft, etc.) during the preparation of the metal rubber blank and sets the winding nodes, so that the spiral roll can achieve good winding accuracy during the winding process along the core shaft, thereby making the hooking / meshing between the metal wires inside the prepared metal rubber blank consistent, the tightness between the blank and the core shaft consistent, and maintaining the same tension, providing a good foundation for the subsequent preparation of metal rubber molded parts.

[0053] As an optional embodiment of the present invention, in step S1, according to the winding angle θ of the spiral coil on the mandrel, the pitch P of the spiral coil is determined according to the following formula (3):

[0054] P = (θ-15°) / B (3)

[0055] Among them, P is the pitch of the spiral coil, the unit is mm; θ is the winding angle, the unit is "°"; B is the pitch coefficient, the value is 10 (empirical value), the unit is ° / mm.

[0056] The relationship between the winding angle θ of the spiral coil on the mandrel and the pitch of the spiral coil in formula (3) is obtained by the inventor through a large amount of experimental experience. It is found in practice that the pitch of the spiral coil calculated by formula (3) is more conducive to the good connection of the prepared metal rubber blank.

[0057] As an optional embodiment of the present invention, in step S1, the winding angle of the spiral winding on the mandrel is 30° to 60°, preferably 45°. Figure 2 Typical but non-limiting winding angles are 30°, 35°, 40°, 45°, 50°, 55° or 60°, etc.

[0058] As an optional embodiment of the present invention, in step S1, the pitch and diameter of the spiral coil are equal. The pitch and diameter will affect the connection of the metal wires inside the metal rubber. Setting the pitch and diameter equal is conducive to the metal wires inside the metal rubber having good connection and the same connection between each other.

[0059] As an optional embodiment of the present invention, in step S1, the pitch and diameter of the spiral coil are 1.5-4.5 mm, for example, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm or 4.5 mm.

[0060] As an optional implementation of the present invention, in step S1, the diameter of the metal wire is 0.15-0.3 mm.

[0061] As an optional embodiment of the present invention, in step S3, the winding angle of the spiral roll on the core shaft is 30 to 60 degrees, preferably 45 degrees.

[0062] As an optional embodiment of the present invention, in step S4, the winding process includes: firstly winding the spiral coil from bottom to top along the trajectory of the winding node in the same inclined direction, then winding the spiral coil from top to bottom along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross winding in sequence. The winding method schematic diagram is shown in Figure 3 As shown, a metal rubber blank is obtained.

[0063] As an optional embodiment of the present invention, in step S4, the winding process includes: firstly winding the spiral roll from top to bottom along the trajectory of the winding node in the same inclined direction, and then winding the spiral roll from bottom to top along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross-winding in sequence to obtain the metal rubber blank.

[0064] According to a second aspect of the present invention, there is provided a metal rubber blank, which is manufactured by the above-mentioned method for preparing the metal rubber blank of the present invention.

[0065] According to a third aspect of the present invention, there is provided a metal rubber molded part, which is made of the metal rubber blank of the present invention.

[0066] In view of the advantages of the metal rubber blank provided by the present invention, the metal rubber molded part made therefrom has good rigidity, damping performance and good performance in coping with bearing forces in different directions.

[0067] As an optional implementation of the present invention, after the metal rubber blank is stamped and formed, the core shaft is removed to obtain a metal rubber molded part.

[0068] The stamping molding can be performed in a conventional stamping die in the art. As an optional embodiment of the present invention, the mandrel is removed from the manufactured metal rubber blank, the blank is placed in a stamping die, and pressure is applied to perform cold stamping to obtain the metal rubber.

[0069] The pressure required for metal rubber molded parts of different densities and thicknesses is different, and can be set according to the preparation requirements of specific metal rubber molded parts. Generally speaking, the molding pressure range is 5.5-40KN.

[0070] As an optional embodiment, the density of the metal rubber molded part is 1.3-3.0 g / cm 3 , for example a typical but non-limiting density of 1.3 g / cm 3 , 1.5g / cm 3 , 1.8g / cm 3 , 2.0g / cm3 , 2.2g / cm 3 , 2.5g / cm 3 , 2.8g / cm 3 or 3.0g / cm 3 wait.

[0071] As an optional embodiment, the size of the metal rubber molded part is 48×48×(12-20) mm.

[0072] The present invention will be further described in detail below with reference to specific embodiments and comparative examples.

[0073] Example 1

[0074] This embodiment provides a method for preparing a metal rubber blank, and the preparation method comprises the following steps:

[0075] S1. A metal wire with a diameter of 0.3 mm is made into a spiral coil;

[0076] The spiral diameter and pitch of the spiral coil are both 3 mm;

[0077] S2. Weigh the mass m0 of the spiral roll according to the density ρ and size V of the pre-designed metal rubber molding;

[0078] The density of the pre-designed metal rubber molded part is ρ1.32g / cm 3 , the size V of the metal rubber molding is 48×48×12mm, so the total mass of the spiral roll m0=ρ×V=36.5g;

[0079] S3. n (n = 8) winding nodes are set on the mandrel, and the height of any two adjacent winding nodes is h1 = D × tanθ;

[0080] In this embodiment, the winding angle is 45°, and the diameter D of the core shaft is 13 mm, so the height of any two adjacent winding nodes h1 = D = 13 mm.

[0081] The total winding height of the spiral winding on the mandrel is h0=(n-1)×h1=91mm, and h0 / m0=0.25;

[0082] S4. The spiral coil is cross-wound along the winding nodes on the mandrel at a winding angle of 45°. The specific winding steps are:

[0083] First, the spiral roll is wound clockwise from bottom to top along the trajectory of the winding node until the entire winding height is filled, and then the spiral roll is wound counterclockwise from top to bottom along the trajectory of the winding node until the entire winding height is filled again. According to the above winding method, cross winding is repeated to obtain a metal rubber blank.

[0084] This embodiment also provides a metal rubber molded part, which is made by using the above metal rubber blank, and the specific method is as follows:

[0085] The metal rubber blank is placed in a specific stamping die, the mandrel is removed, and then a molding pressure is applied for cold stamping to obtain a metal rubber molded part, wherein the molding pressure is 7.5±0.5KN. The actual picture of the metal rubber molded part is as follows Figure 4 shown.

[0086] Example 2

[0087] This embodiment provides a method for preparing a metal rubber blank. In addition to setting n (n=7) winding nodes on the core shaft, the height h1 (h1=D×tanθ, where the winding angle is 45° and the diameter D of the core shaft is 13 mm) between any two adjacent winding nodes is still 13 mm, the total winding height of the spiral winding on the core shaft is h0=(n-1)×h1=78 mm, and h0 / m0=0.214, and the remaining steps are the same as in Example 1.

[0088] Example 3

[0089] The present embodiment provides a method for preparing a metal rubber blank. In addition to adjusting the winding angle θ in step S3 from 45° to 30°, the pitch of the spiral roll is adjusted to 1.5 mm, and the height h1 of any two adjacent winding nodes (h1=D×tanθ, the diameter D of the core shaft is 13 mm) is 7.5 mm. In order to make the total winding height h0 of the spiral roll on the core shaft basically remain unchanged, the number of winding nodes on the core shaft is set to 13, then the total winding height h0 of the spiral roll on the core shaft is h0=(n-1)×h1=90 mm, and h0 / m0=0.246, and the remaining steps are the same as Example 1.

[0090] Example 4

[0091] The present embodiment provides a method for preparing a metal rubber blank. In addition to adjusting the winding angle θ in step S3 from 45° to 60°, the pitch of the spiral roll is adjusted to 4.5 mm, and the height h1 of any two adjacent winding nodes (h1=D×tanθ, the diameter D of the core shaft is 13 mm) is 22.5 mm. In order to make the total winding height h0 of the spiral roll on the core shaft basically remain unchanged, the number of winding nodes set on the core shaft is 5, then the total winding height h0 of the spiral roll on the core shaft is h0=(n-1)×h1=90 mm, and h0 / m0=0.246, and the remaining steps are the same as Example 1.

[0092] Example 5

[0093] This embodiment provides a method for preparing a metal rubber blank. In addition to adjusting the winding angle θ in step S3 from 45° to 5°, the pitch of the spiral roll is 3 mm, and the height h1 (h1=D×tanθ) of any two adjacent winding nodes is 1.1 mm. In order to make the total winding height h0 of the spiral roll on the core shaft basically remain unchanged, the number of winding nodes set on the core shaft is 83, then the total winding height h0 of the spiral roll on the core shaft is h0=(n-1)×h1=90.2 mm, and h0 / m0=0.247, and the remaining steps are the same as Example 1.

[0094] It should be noted that, since the winding angle θ is too small, in order to maintain a certain total winding height of the spiral winding on the mandrel, too many winding nodes need to be set, which greatly increases the workload, and the connection between the metal wires in the metal rubber blank is poor, and the metal rubber molded parts cannot be formed normally. Figure 5 shown.

[0095] Example 6

[0096] This embodiment provides a method for preparing a metal rubber blank, and the preparation method comprises the following steps:

[0097] S1. A metal wire with a diameter of 0.3 mm is made into a spiral coil;

[0098] The spiral diameter and pitch of the spiral coil are both 3 mm;

[0099] S2. Weigh the mass m0 of the spiral roll according to the density ρ and size V of the pre-designed metal rubber molding;

[0100] The density of the pre-designed metal rubber molded part is ρ1.83g / cm 3 , the size V of the metal rubber molding is 48×48×16mm, so the total mass of the spiral roll m0=ρ*V=67.5g;

[0101] S3. n (n = 14) winding nodes are set on the mandrel, and the height of any two adjacent winding nodes is h1 = D × tanθ;

[0102] In this embodiment, the winding angle is 45°, and the diameter D of the core shaft is 13 mm, so the height of any two adjacent winding nodes h1 = D = 13 mm.

[0103] The total winding height of the spiral winding on the mandrel is h0=(n-1)×h1=169mm, and h0 / m0=0.25;

[0104] S4. The spiral coil is cross-wound along the winding nodes on the mandrel at a winding angle of 45°. The specific winding steps are:

[0105] First, the spiral roll is wound clockwise from bottom to top along the trajectory of the winding node until the total winding height is filled, and then the spiral roll is wound counterclockwise from top to bottom along the trajectory of the winding node until the total winding height is filled again. According to the above winding method, cross winding is repeated to obtain a metal rubber blank.

[0106] This embodiment also provides a metal rubber molded part, which is made by using the above metal rubber blank, and the specific method is as follows:

[0107] The metal rubber blank is placed in a specific stamping die, the mandrel is removed, and then a forming pressure is applied for cold stamping to obtain a metal rubber molded part, wherein the forming pressure is 15±0.5KN.

[0108] Comparative Example 1

[0109] This comparative example provides a method for preparing a metal rubber blank, except that no winding node is set in step S3, but the total winding height remains unchanged, and the remaining steps are the same as those in Example 1.

[0110] Comparative Example 2

[0111] This comparative example provides a method for preparing a metal rubber blank. In step S3, n (n=10) winding nodes are set on the core shaft, and the height h1 of any two adjacent winding nodes remains unchanged at 13 mm. The total winding height of the spiral roll is h0=(n-1)×h1=117 mm, and h0 / m0=0.32. The remaining steps are the same as those in Example 1.

[0112] Comparative Example 3

[0113] This comparative example provides a method for preparing a metal rubber blank. In step S3, n (n=5) winding nodes are set on the core shaft, and the height h1 of any two adjacent winding nodes remains unchanged at 13 mm. The total winding height of the spiral roll is h0=(n-1)×h1=42 mm, h0 / m0=0.115, and the remaining steps are the same as those in Example 1.

[0114] In order to further compare the technical effects of the above embodiments and comparative examples, the following experimental examples are specially set up.

[0115] Experimental Example 1

[0116] The stiffness and damping performance of the metal rubber molded parts provided in each embodiment and comparative example were tested, and the specific results are shown in Table 1. It should be noted that since the metal rubber molded part in Example 5 could not be formed normally, its stiffness and specific damping data could not be tested.

[0117] In the stiffness test, a force of 2KN is applied to the metal rubber molded part, which is slowly pressed down, and the stiffness corresponding to the 2KN pressing force is recorded.

[0118] The damping performance is the specific damping of the metal rubber molding under the condition of testing frequency of 2Hz and amplitude of 0.3mm. The dynamic test is carried out on PLS-20 electro-hydraulic servo fatigue testing machine and DH5936 vibration test system, and the experiment is carried out according to the standard GB / T15168-2013.

[0119] Table 1

[0120]

[0121]

[0122] It can be seen from the data in Table 1 that the metal rubber molded part prepared by the preparation method of the present invention has good stiffness and damping performance.

[0123] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a metal rubber blank, characterized in that: The following steps are involved: S1. Providing a spiral coil made of a metal wire; S2. Determine the total mass m0 of the required spiral roll according to the preset density ρ and size V of the metal rubber molded part; S3. n winding nodes are set on the mandrel. According to the winding angle θ of the spiral winding on the mandrel and the diameter D of the mandrel, the height h1 of any two adjacent winding nodes is determined to be D×tanθ. Then, the total winding height h0 of the spiral winding on the mandrel meets the following formulas (1) and (2): h0 = (n-1) × h1 (1) A1 × m0≤h0≤A2 × m0 (2) Wherein, h0 is the total winding height of the spiral roll on the mandrel, in cm; h1 is the height of any two adjacent winding nodes on the mandrel, in cm; n is the number of winding nodes on the mandrel, n is an integer and n≥2; A1 and A2 are both winding coefficients, A1 is 0.2, A2 is 0.25, in cm / g; m0 is the total mass of the spiral roll, in g; S4. The spiral roll is wound along the trajectory of the winding node on the mandrel to obtain a metal rubber blank; In the above preparation method, the pitch P of the spiral coil is determined according to the winding angle θ of the spiral coil on the mandrel using the following formula (3): P = (θ-15°) / B (3) Wherein, P is the pitch of the spiral coil, in mm; θ is the winding angle, in degrees; B is the pitch coefficient, with a value of 10, in degrees / mm; The winding angle of the spiral roll on the core shaft is 30 to 60 degrees.

2. The preparation method according to claim 1, characterized in that: In step S1, the pitch and diameter of the spiral coil are the same.

3. The preparation method according to claim 2, characterized in that: In step S1, the pitch and diameter of the spiral coil are 1.5-4.5 mm; And / or, the diameter of the metal wire is 0.15-0.3 mm.

4. The preparation method according to claim 1, characterized in that: In step S2, the total mass of the spiral winding required is m0=ρ×V.

5. The preparation method according to claim 1 or 2, characterized in that: In step S1 and step S3, the winding angle of the spiral roll on the core shaft is 45°.

6. The preparation method according to any one of claims 1 to 4, characterized in that: In step S4, the winding process includes: firstly winding the spiral roll from bottom to top along the trajectory of the winding node in the same inclined direction, then winding the spiral roll from top to bottom along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross-winding in sequence to obtain the metal rubber blank.

7. The preparation method according to any one of claims 1 to 4, characterized in that: In step S4, the winding process includes: in step S4, the winding process includes: firstly winding the spiral roll from top to bottom along the trajectory of the winding node in the same inclined direction, and then winding the spiral roll from bottom to top along the trajectory of the winding node in the opposite direction of the inclined direction, and repeating the cross-winding in sequence to obtain the metal rubber blank.

8. A metal rubber blank, characterized in that: The invention is prepared by the preparation method according to any one of claims 1 to 7.

9. A metal rubber molded part, characterized in that: It is made of the metal rubber blank described in claim 8.

10. The metal rubber molded part according to claim 9, characterized in that: The core shaft is removed from the metal rubber blank, and then stamping is performed to obtain the metal rubber.

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