Yunnan high-compression spring and preparation process thereof

Abstract

The invention relates to the technical field of compression spring preparation, in particular to a Yunnan high-compression spring and a preparation process thereof.The Yunnan high-compression spring comprises a body, the upper end and the lower end of the body are each provided with a small spring coil, and the bottom of the small spring coil located at the top of the body is connected with a spring coil A. According to the invention, the armpit noise that the spring of the mattress is pressed is not generated, the mattress does not have a stiff feeling, the stress surface and the stress value of each ring layer of the spring are different due to the olive-shaped design, the stress value is continuously increased from two ends to the middle, and when the spring is pressed, the force transmission is progressive layer by layer from the two ends to the middle, so that the stress value is increased. When the spring is subjected to strong pressure, due to the strong stress surface and the stress value of the middle ring layer of the spring, the spring can bear the strong pressure and is not deformed and damaged, after the strong pressure is relieved, the spring can rebound and restore as early as possible, and a mattress made of the spring has strong pressure bearing performance and strong rebound performance and is lower in cost.

Description

Technical Field

[0001] The invention relates to the technical field of compression spring preparation, and in particular to a Yunnian high compression spring and a preparation process thereof. Background Art

[0002] The existing straight cylindrical springs have smaller tail turns at both ends, while the middle turns are the same in size, and the force-bearing surfaces and force values ​​of the middle turns are also the same.

[0003] Therefore, when the spring is fully compressed, since the middle coils of the spring are the same size, the steel wires of adjacent springs will directly collide with each other, which will not only produce the sound of the steel wires colliding, but also the direct collision of the steel wires will make it feel stiff. When a person exerts a greater pressure on a mattress made of such springs, not only will there be a squeaking noise caused by the springs being compressed inside the mattress, but the mattress will also feel stiff and creaky.

[0004] At the same time, since the force-bearing surfaces and force values ​​of the middle several turns of the spring are the same, when the spring is under pressure, the force transmission is also straight-cylindrical. When the spring is subjected to strong pressure, it is easy for the spring to deform and be damaged. After the strong pressure is released, the spring cannot rebound and restore. Moreover, while achieving the same hardness and strength, the existing straight-cylindrical 5.5-turn spring needs to be made of 2.3-2.5 mm steel wire, which is costly.

[0005] In summary, it is necessary to propose a Yunnian high compression spring and its preparation process to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a Yunnian high compression spring and a preparation process thereof to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A Yunnian high compression spring comprises a body, wherein a small spring coil is respectively arranged at the upper and lower ends of the body, the bottom of the small spring coil located at the top of the body is connected to a spring coil A, the bottom of the spring coil A is connected to a spring coil B, the bottom of the spring coil B is connected to a spring coil C, the bottom of the spring coil C is connected to a spring coil D, the bottom of the spring coil D is connected to a spring coil E, the bottom of the spring coil E is connected to a spring coil F, and the bottom of the spring coil F is connected to the small spring coil located at the bottom of the body.

[0009] Preferably, the stressed lengths of the spring coils A and F are both 3 cm, the stressed lengths of the spring coils B and E are both 8 cm, and the stressed lengths of the spring coils C and D are both 8.5 cm.

[0010] Preferably, the diameters of the coils A and F are both 4.8-5.5 cm, the diameters of the coils B and E are both 5.5-6 cm, and the diameters of the coils C and D are both 6-7 cm.

[0011] Based on the above Yunnian high compression spring, the present invention also provides a preparation process of the Yunnian high compression spring, comprising the following steps:

[0012] S1. According to the specifications of Yunnian high compression spring, select the wires suitable for coil A and coil F: 4.8-5.5cm, coil B and coil E5.5-6cm, coil C5 and coil D6-7cm. The cross-sectional diameter of the wire is 1.8-1.95mm. After the shearing machine cuts it, it passes through the wire straightening machine to ensure that the wire is straight and without bending;

[0013] S2. Place the wire into a melting furnace and heat it to a molten state, pour the molten metal into the mold of the Yunnian high compression spring, use a die-casting machine to apply pressure to the mold, so that the metal is fully filled and solidified in the mold to form a fused and cast Yunnian high compression spring structure;

[0014] S3. The spring after casting is removed from the mold and quickly placed in a cooling water tank for cooling. After cooling to room temperature, an air cooling device is used to further accelerate the cooling process;

[0015] S4. Use a grinder to grind the surface of the spring to remove burrs and uneven parts to ensure that the surface of the spring is smooth and flat. Use a polishing machine to polish the spring to improve its surface finish and aesthetics.

[0016] Preferably, the straightness tolerance of the wire after straightening by the straightening machine in step S1 is ±0.1 mm.

[0017] Preferably, in step S2, the pressure of the die-casting machine is 50-200 tons, and the solidification time is 5-15 minutes.

[0018] Preferably, the grinding wheel particle size of the grinder in step S4 is 60-120 mesh, and the surface roughness of the spring after grinding is less than Ra0.8 μm.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the spring of the present invention is designed to be olive-shaped, that is, the coils at the two ends are small and gradually become larger toward the middle coil, the sizes of the two adjacent coils are different, the force-bearing surface and the force value of each coil are also different, and when the spring is fully compressed, the steel wires of the two adjacent coils of the spring will stagger with each other instead of directly colliding with each other, which not only solves the problem of the sound produced by the collision of the spring steel wires, but also solves the stiff feeling caused by the direct collision of the spring steel wires. No matter how much pressure is generated on the mattress, not only will there be no sound of the mattress spring being compressed, but also the sound of the mattress spring being compressed will not be heard. There is no squeaking noise, and the mattress will not feel stiff and creaky. Because of the olive-shaped design of the present invention, the force-bearing surface and force value of each coil layer of the spring are different, and the force value increases continuously from both ends to the middle. When the spring is under pressure, the force transmission is also progressive from both ends to the middle layer. When the spring is subjected to strong pressure, due to the strong force-bearing surface and force value of the middle coil layer of the spring, the spring can withstand the strong pressure without deformation or damage. After the strong pressure is released, the spring can rebound and return to its original state. The mattress made of the spring has strong pressure-bearing performance and strong rebound performance, and at the same time has lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure diagram of the Yunnian high compression spring of the present invention is shown.

[0021] In the figure:

[0022] 1. Main body; 2. Small spring coil; 3. Spring coil A; 4. Spring coil B; 5. Spring coil C; 6. Spring coil D; 7. Spring coil E; 8. Spring coil F. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1 A Yunnian high compression spring comprises a body 1, wherein a small spring coil 2 is respectively arranged at the upper and lower ends of the body 1, a spring coil A3 is connected to the bottom of the small spring coil 2 located at the top of the body 1, a spring coil B4 is connected to the bottom of the spring coil B4, a spring coil C5 is connected to the bottom of the spring coil C5, a spring coil D6 is connected to the bottom of the spring coil D6, a spring coil E7 is connected to the bottom of the spring coil E7, a spring coil F8 is connected to the bottom of the spring coil F8, and the bottom of the spring coil F8 is connected to the small spring coil 2 located at the bottom of the body 1.

[0026] Furthermore, the stress-bearing lengths of the spring coil A3 and the spring coil F8 are both 3 cm, the stress-bearing lengths of the spring coil B4 and the spring coil E7 are both 8 cm, and the stress-bearing lengths of the spring coil C5 and the spring coil D6 are both 8.5 cm, so that the stress-bearing surface and stress value of each coil layer of the spring are different.

[0027] Furthermore, the diameters of the spring coil A3 and the spring coil F8 are both 4.8-5.5 cm, the diameters of the spring coil B4 and the spring coil E7 are both 5.5-6 cm, and the diameters of the spring coil C5 and the spring coil D6 are both 6-7 cm, so that the force-bearing surface and force value at both ends of the spring are relatively smaller, and increase progressively toward the middle, and the force-bearing surface and force value in the middle of the spring are relatively larger.

[0028] Example 2

[0029] Based on the above Yunnian high compression spring, the present invention also provides a preparation process of the Yunnian high compression spring, which specifically comprises the following steps:

[0030] S1. According to the specifications of Yunnian high compression spring, select the wires with the suitable spring coils A3 and F8: 4.8-5.5cm, spring coils B4 and E7: 5.5-6cm, spring coils C5 and D6: 6-7cm. The cross-sectional diameter of the wire is 1.8-1.95mm. After the shearing machine cuts it, it passes through the wire straightening machine to ensure that the wire is straight and without bending;

[0031] Specifically, the straightness tolerance of the wire after straightening by the straightening machine in step S1 is ±0.1 mm;

[0032] S2. Place the wire into a melting furnace and heat it to a molten state, pour the molten metal into the mold of the Yunnian high compression spring, use a die-casting machine to apply pressure to the mold, so that the metal is fully filled and solidified in the mold to form a fused and cast Yunnian high compression spring structure;

[0033] Specifically, in step S2, the pressure of the die-casting machine is 50-200 tons, and the solidification time is 5-15 minutes;

[0034] S3. The spring after casting is removed from the mold and quickly placed in a cooling water tank for cooling. After cooling to room temperature, an air cooling device is used to further accelerate the cooling process;

[0035] S4. Use a grinder to grind the surface of the spring to remove burrs and uneven parts to ensure that the surface of the spring is smooth and flat. Use a polishing machine to polish the spring to improve its surface finish and aesthetics. Specifically, the grinding wheel size of the grinder in step S4 is 60-120 mesh, and the surface roughness of the spring after grinding is less than Ra0.8μm.

[0036] Through the above steps S1 to S4, a Yunnian high compression spring is obtained, which is used for mattress manufacturing. Each compression spring has 6.5 turns, which is one turn more than the existing commonly used mattress springs, and the shape of the spring is olive-shaped, that is, the turns at the two ends are small and gradually become larger toward the middle.

[0037] Among them, the diameter of the outermost circle at both ends of the spring is 4.8-5.5 cm, the diameter of the second circle at both ends is 5.5-6 cm, and the diameter of the two middle circles is 6-7 cm, so that the force surface and force value of each circle of the spring are different. At the same time, the force surface length of the first circle is 3 cm, the second circle is 8 cm, the third circle is 8.5 cm, the fourth circle is 8 cm, and the tail circle is 5 cm. That is, the force surface and force value at both ends of the spring are relatively smaller, and increase progressively towards the middle. The force surface and force value in the middle of the spring are relatively larger.

[0038] Therefore, compared with the traditional spring, under the condition of achieving the same hardness and strength, the existing straight-cylindrical 5.5-turn spring needs to be made of 2.3-2.5 mm steel wire, while the spring of the present invention only needs to be made of 1.8-1.95 mm steel wire. Calculated from the steel wire material cost, the steel wire cost of the present invention is reduced;

[0039] The existing straight-cylindrical 5.5-turn spring generally has a length of 22 cm, while the present invention has a 6.5-turn spring, and a spring length of 34-36 cm. Under the same height requirement of the mattress, the 34-36 cm of the present spring and the 22 cm of the 5.5-turn spring are compressed to the same height, and the compressed spring has stronger elasticity and higher hardness;

[0040] At the same time, the spring of the present invention is designed to be olive-shaped, that is, the coils at the two ends are small and gradually increase toward the middle coil. The sizes of the two adjacent coils are different, and the force-bearing surface and force value of each coil are also different. When the spring is fully compressed, the steel wires of the two adjacent coils will stagger with each other, and will not collide directly with each other, which not only solves the problem of the sound produced by the collision of the spring steel wires, but also solves the stiff feeling caused by the direct collision of the spring steel wires. No matter how much pressure is generated on the mattress, not only will there be no creaking noise caused by the mattress spring being compressed, but the mattress will not have a stiff feeling. In addition, because of the olive-shaped design of the present invention, the force-bearing surface and force value of each coil of the spring are different, and the force value increases continuously from the two ends to the middle. When the spring is under pressure, the force transmission is also progressive from the two ends to the middle layer. When the spring is subjected to strong pressure, due to the strong force-bearing surface and force value of the middle coil of the spring, the spring can withstand the strong pressure without deformation and damage. After the strong pressure is released, the spring can rebound and return to its original state. The mattress made of the spring has strong pressure-bearing performance and strong rebound performance.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Yunnian high compression spring, characterized in that: The invention comprises a body (1), wherein a small spring coil (2) is respectively arranged at the upper and lower ends of the body (1), the bottom of the small spring coil (2) located at the top of the body (1) is connected to a spring coil A (3), the bottom of the spring coil A (3) is connected to a spring coil B (4), the bottom of the spring coil B (4) is connected to a spring coil C (5), the bottom of the spring coil C (5) is connected to a spring coil D (6), the bottom of the spring coil D (6) is connected to a spring coil E (7), the bottom of the spring coil E (7) is connected to a spring coil F (8), and the bottom of the spring coil F (8) is connected to the small spring coil (2) located at the bottom of the body (1).

2. The Yunnian high compression spring according to claim 1, characterized in that: The stressed lengths of the spring coil A (3) and the spring coil F (8) are both 3 cm, the stressed lengths of the spring coil B (4) and the spring coil E (7) are both 8 cm, and the stressed lengths of the spring coil C (5) and the spring coil D (6) are both 8.5 cm.

3. The Yunnian high compression spring according to claim 2, characterized in that: The diameters of the coils A (3) and F (8) are both 4.8-5.5 cm, the diameters of the coils B (4) and E (7) are both 5.5-6 cm, and the diameters of the coils C (5) and D (6) are both 6-7 cm.

4. A preparation process of a Yunnian high compression spring, according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. According to the specifications of Yunnian high compression spring, select the wire with the diameter of 4.8-5.5cm for coil A (3) and coil F (8), 5.5-6cm for coil B (4) and coil E (7), and 6-7cm for coil C (5) and coil D (6) according to the specifications of Yunnian high compression spring. The cross-sectional diameter of the wire is 1.8-1.95mm. After cutting with a shearing machine, pass it through a wire straightening machine to ensure that the wire is straight and without bends. S2. Place the wire into a melting furnace and heat it to a molten state, pour the molten metal into the mold of the Yunnian high compression spring, use a die-casting machine to apply pressure to the mold, so that the metal is fully filled and solidified in the mold to form a fused and cast Yunnian high compression spring structure; S3. The spring after casting is removed from the mold and quickly placed in a cooling water tank for cooling. After cooling to room temperature, an air cooling device is used to further accelerate the cooling process; S4. Use a grinder to grind the surface of the spring to remove burrs and uneven parts to ensure that the surface of the spring is smooth and flat. Use a polishing machine to polish the spring to improve its surface finish and aesthetics.

5. The preparation process of a Yunnian high compression spring according to claim 4, characterized in that: The straightness tolerance of the wire after straightening by the straightening machine in step S1 is ±0.1 mm.

6. The preparation process of a Yunnian high compression spring according to claim 5, characterized in that: In step S2, the pressure of the die-casting machine is 50-200 tons, and the solidification time is 5-15 minutes.

7. The preparation process of a Yunnian high compression spring according to claim 6, characterized in that: In step S4, the grinding wheel particle size of the grinding machine is 60-120 meshes, and the surface roughness of the spring after grinding is less than Ra0.8 μm.

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