阅读说明：本技术 一种v型弹簧及其生产方法 (V-shaped spring and production method thereof ) 是由 刘雪峰 李玉箫 于 2019-10-30 设计创作，主要内容包括：本发明提供了一种V型弹簧及其生产方法,涉及密封零件技术领域,解决了现有技术中拉伸弹簧或O型橡胶圈不能满足泛塞密封的特殊要求的技术问题。该V型弹簧包括由两个长侧边均开设有缺口的条状板材沿与自身长度方向平行的中线折弯而成,折弯后条状板材的横截面呈V型并且中部折弯处呈弧形,两长侧边的缺口交错设置,如此,V型弹簧弯曲更容易成环,并且成环后力学受力点分布更加均匀,具有高回弹性,极限压缩量明显增大,弹性范围大,降低了泛塞密封圈的公差。条状板材的材质为Inconel-718合金或埃尔吉洛伊非磁性合金,能够耐高低温、耐腐蚀特性强并具有良好的抗氧化性,能适应高温密封环境,本发明用于提高泛塞密封圈的使用性能。(The invention provides a V-shaped spring and a production method thereof, relates to the technical field of sealing parts, and solves the technical problem that an extension spring or an O-shaped rubber ring in the prior art cannot meet the special requirement of flooding plug sealing. This V type spring includes that the strip panel that has the breach all seted up by two long sides is bent along the central line parallel with self length direction and is formed, the transversal V type of personally submitting of strip panel after bending and the middle part department of bending is the arc, the breach crisscross setting of two long sides, so, the crooked easier cyclization of V type spring to mechanics stress point distributes more evenly after the cyclization, has high resilience, limit compression volume obviously increases, elastic range is big, the tolerance of general stopper sealing washer has been reduced. The strip-shaped plate is made of Inconel-718 alloy or Elgiloy non-magnetic alloy, can resist high and low temperatures, has strong corrosion resistance and good oxidation resistance, can adapt to a high-temperature sealing environment, and is used for improving the service performance of the flooding plug sealing ring.)

1. A V-shaped spring is characterized in that a strip-shaped plate (1) with a plurality of notches (2) arranged on two long side edges is bent along a central line parallel to the length direction of the plate, the bent plate is still strip-shaped, the cross section of the bent strip-shaped plate (1) is V-shaped, and the bent part in the middle is arc-shaped; the notches (2) on the first long side of the strip-shaped plate (1) and the notches (2) on the second long side of the strip-shaped plate (1) are arranged in a staggered mode, and the strip-shaped plate (1) is made of Inconel-718 alloy or Elgiloy non-magnetic alloy.

2. The V-shaped spring according to claim 1, wherein the extension length of the notch (2) along the width direction of the strip-shaped plate (1) is larger than half of the width of the strip-shaped plate (1).

3. The V-shaped spring according to claim 2, wherein the bottom of the notch (2) is a cambered surface.

4. A method for producing a V-spring, wherein the V-spring is the V-spring according to any one of claims 1 to 3, comprising the steps of:

selecting a thickness value C of the strip-shaped plate (1) according to the stress to be borne by the spring;

determining a width value K of the strip-shaped plate (1) before bending according to an opening distance value A of the first long side and the second long side after the strip-shaped plate (1) is bent, a distance value B of the first long side or the second long side and the middle bending part of the strip-shaped plate (1) and a thickness value C of the strip-shaped plate (1);

selecting the width value F of a single notch (2) according to the thickness value C of the strip-shaped plate (1);

selecting a distance value E between two adjacent notches (2) according to the width value F of the single notch (2);

determining the distance value H between the bottom of the notch (2) on the first long side and the second long side according to the distance value E between two adjacent notches (2) and the width value F of the single notch (2)₁And the distance value H between the bottom of the notch (2) on the second long side and the first long side₂Wherein H is₁＝H₂；

Determining an arc radius value R of the bent part in the middle of the strip-shaped plate (1) according to the distance value A between the first long side and the second long side of the bent strip-shaped plate (1);

according to the thickness value C of the strip-shaped plate (1), the width value K of the strip-shaped plate (1) before bending, the width value F of a single notch (2), the distance value E between two adjacent notches (2), and the distance value H between the bottom of the notch (2) on the first long side and the second long side₁The distance value H between the bottom of the notch (2) on the second long side and the first long side₂Drawing a drawing with the parameter value of the arc radius value R of the cross section of the bent part in the middle of the strip-shaped plate (1) for processing;

and extracting the processed finished product as a sample, and performing a compression experiment, a durability experiment, a fatigue test and a spring performance curve analysis.

5. The method for producing a V-shaped spring according to claim 4, wherein the compression experiment comprises loading and unloading the spring, measuring the compression amount of the spring corresponding to each load value, drawing a relationship graph between the load and the compression amount of the spring, judging whether the maximum compression amount of the spring reaches 40%, measuring the corresponding maximum compression amount under the constraint condition of an energy loss surface not greater than 10%, and selecting the maximum compression amount as the limit compression amount.

6. The production method according to claim 5, wherein the endurance test is a test in which after the spring is kept in a compressed state for at least twenty-four hours under a specified amount of compression, the size of the spring is measured and it is judged whether the change in the size value of the spring is within 0.1 mm and it is judged whether the spring is significantly deformed.

7. The production method of the V-shaped spring according to claim 5, wherein the fatigue test is to repeatedly load and unload the spring within a set compression range, wherein the repeated times are 1000 times, the frequency is 30s, the loading and unloading process is performed once, and after the process is finished, whether the spring fails is judged, and the failure standard is that the spring cannot keep the original state or breaks; and if the spring does not fail, performing a compression experiment to check whether the performance of the spring meets the requirement.

8. The method for producing a V-spring according to claim 5, wherein said spring performance curve analysis comprises:

analyzing whether the load and the compression amount of the spring are in a linear relation or not according to a spring loading curve graph, and checking whether a curve appears in the graph or not and whether the slope of the graph is suddenly increased or not;

and checking whether the load value of the front section of the graph suddenly drops or not and whether the rear section of the graph is approximately straight or not according to the spring unloading curve graph.

9. The method for producing a V-spring according to claim 5, further comprising:

selecting a load value under the limit compression amount as a limit load value after the limit compression amount is measured;

selecting experimental data corresponding to the limit load value to calculate to obtain an area value of the energy loss surface (5);

the safety factor is selected to be 5% of the limit compression amount.

10. The production method of the V-shaped spring according to claim 4, wherein the radius R of the arc shape of the cross section of the bent part at the middle part of the strip-shaped plate (1) is smaller thanWherein the standard compression amount takes 40%.

Technical Field

The invention relates to the technical field of sealing parts, in particular to a V-shaped spring and a production method thereof.

Background

The flood plug sealing ring is a high-performance sealing element with a spring in U-shaped Teflon, and the sealing lip (surface) is ejected out by adding proper spring force and system fluid pressure to lightly press the sealed metal surface so as to generate excellent sealing effect. The spring actuation effect can overcome slight eccentricity of the metal mating surfaces and wear of the sealing lips, while continuing to maintain the desired sealing performance. Teflon generally refers to polytetrafluoroethylene, polytetrafluoroethylene (abbreviated as PTFE), commonly referred to as "non-stick coatings" or "easy-to-clean materials". The material has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, has extremely low friction coefficient, can be used for lubricating and is an ideal coating for easily cleaning the inner layer of the water pipe. The universal plug sealing ring is widely applied to the fields of pumps, valves, molds, mechanical equipment, petrochemical industry and the like.

The common sealing ring is mostly provided with initial sealing force and compensation by a common extension spring or an O-shaped rubber ring, the limit compression amount of the common O-shaped rubber ring is about 20 percent, the common O-shaped rubber ring can resist the temperature of +200 ℃, and even the better fluororubber ring can only reach within +300 ℃. The extension spring is formed by winding metal wires with circular cross sections, is connected end to form a ring, and can only provide unidirectional centripetal pressure. No matter the extension spring or the O-shaped rubber ring, the factors such as the limit compression amount, temperature resistance, corrosion resistance, aging resistance and the like can not meet the special requirements of flooding plug sealing.

Therefore, how to solve the technical problem that the extension spring or the O-shaped rubber ring in the prior art cannot meet the special requirement of the flooding plug seal has become an important technical problem to be solved by the person in the art.

Disclosure of Invention

The invention aims to provide a V-shaped spring and a production method thereof, and solves the technical problem that an extension spring or an O-shaped rubber ring in the prior art cannot meet the special requirement of flooding plug sealing. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the V-shaped spring is formed by bending a strip-shaped plate with a plurality of notches on two long side edges along a central line parallel to the length direction of the plate, the bent plate is still strip-shaped, the cross section of the bent strip-shaped plate is V-shaped, and the bent part in the middle is arc-shaped; the notches on the first long side edge of the strip-shaped plate and the notches on the second long side edge of the strip-shaped plate are arranged in a staggered mode, and the strip-shaped plate is made of Inconel-718 alloy or Elgiloy non-magnetic alloy.

Preferably, the extension length of the notch along the width direction of the strip-shaped plate is greater than half of the width of the strip-shaped plate.

Preferably, the bottom of each notch is an arc surface.

The invention also provides a production method of the V-shaped spring, wherein the V-shaped spring is the V-shaped spring and comprises the following steps: selecting a thickness value C of the strip-shaped plate according to the stress to be borne by the spring; determining a width value K of the strip-shaped plate before bending according to an opening distance value A of the first long side and the second long side after the strip-shaped plate is bent, a distance value B of the first long side or the second long side and the middle bending part of the strip-shaped plate and a thickness value C of the strip-shaped plate; selecting the width value F of a single notch according to the thickness value C of the strip-shaped plate; selecting a distance value E between two adjacent gaps according to the width value F of the single gap; determining the distance value H between the bottom of the notch on the first long side and the second long side according to the distance value E between two adjacent notches and the width value F of a single notch₁And the distance value H between the bottom of the notch on the second long side and the first long side₂Wherein H is₁＝H₂(ii) a Determining an arc radius value R of the bent part in the middle of the strip-shaped plate according to the distance value A between the first long side and the second long side of the bent strip-shaped plate; according to the thickness value C of the strip-shaped plate, the width value K of the strip-shaped plate before being bent, the width value F of a single notch, the distance value E between two adjacent notches, and the distance value H between the bottom of the notch on the first long side and the second long side₁The distance value H between the bottom of the notch on the second long side and the first long side₂Drawing a drawing for parameter numerical values of the arc radius value R of the bending part in the middle of the strip-shaped plate, and addingWorking; and extracting the processed finished product as a sample, and performing a compression experiment, a durability experiment, a fatigue test and a spring performance curve analysis.

Preferably, the compression experiment is to load and unload the spring, measure the compression amount of the spring corresponding to each load value, draw a relationship graph between the load and the compression amount of the spring, determine whether the maximum compression amount of the spring reaches 40%, measure the corresponding maximum compression amount with an energy loss surface not greater than 10% as a constraint condition, and select the maximum compression amount as the limit compression amount.

Preferably, the endurance test is to measure the size of the spring and judge whether the change of the size value of the spring is within 0.1 mm and judge whether there is significant deformation of the spring after the spring is kept in a compressed state for at least twenty-four hours under a specified compression amount.

Preferably, the fatigue test is to perform repeated loading and unloading processes on the spring within a set compression range, wherein the repeated times are 1000 times, the frequency is 30s, the loading and unloading processes are performed once, and after the completion, whether the spring fails is judged, and the failure standard is that the spring cannot keep the original state or is broken; and if the spring does not fail, performing a compression experiment to check whether the performance of the spring meets the requirement.

Preferably, the spring performance curve analysis comprises: analyzing whether the load and the compression amount of the spring are in a linear relation or not according to a spring loading curve graph, and checking whether a curve appears in the graph or not and whether the slope of the graph is suddenly increased or not; and checking whether the load value of the front section of the graph suddenly drops or not and whether the rear section of the graph is approximately straight or not according to the spring unloading curve graph.

Preferably, the method further comprises the following steps: selecting a load value under the limit compression amount as a limit load value after the limit compression amount is measured; selecting experimental data corresponding to the limit load value to calculate to obtain an area value of an energy loss surface; the safety factor is selected to be 5% of the limit compression amount.

Preferably, the radius value R of the arc of the cross section of the bending part in the middle of the strip-shaped plate is smaller thanWherein the standard compression amount takes 40%.

The V-shaped spring provided by the invention is formed by bending a strip-shaped plate with a plurality of notches on two long side edges along a central line parallel to the length direction of the plate, the bent plate still takes the shape of a strip, the cross section of the bent strip-shaped plate is V-shaped, the bent part at the middle part of the bent plate takes the shape of an arc, the notch on the first long side edge of the strip-shaped plate and the notch on the second long side edge of the strip-shaped plate are arranged in a staggered way, when the V-shaped spring is bent and rolled up and installed in the Teflon shell, the V-shaped spring is easier to bend to form a ring, and the mechanical stress points after the ring formation are more uniformly distributed, compared with an extension spring, the V-shaped spring has high resilience, the limit compression amount can reach or exceed 40 percent, the limit compression amount is obviously increased, more compensation force can be provided for the flooding plug sealing ring, and the tolerance of the flooding plug sealing ring can be reduced due to the large elastic range of the V-shaped spring. The strip-shaped plate is made of Inconel-718 alloy or Elgiloy non-magnetic alloy, can resist high and low temperatures, has strong corrosion resistance, good oxidation resistance and excellent heat treatment performance, can adapt to a high-temperature sealing environment, and solves the technical problem that a tension spring or an O-shaped rubber ring in the prior art cannot meet the special requirement of flooding plug sealing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a strip of sheet material provided by an embodiment of the present invention before bending;

FIG. 2 is a schematic view of a strip of sheet material provided in an embodiment of the present invention after bending;

FIG. 3 is a front view of a strip of sheet material after bending, according to an embodiment of the present invention;

FIG. 4 is a side view of a strip of sheet material after bending, according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the position of a dimension parameter of a strip-shaped plate before bending according to an embodiment of the present invention;

FIG. 6 is a table of sample dimensional data for a V-spring according to an embodiment of the present invention;

FIG. 7 is a table of performance parameters for a V-spring sample according to an embodiment of the present invention;

FIG. 8 is a graph showing the relationship between load and compression when the compression of a sample V-shaped spring according to an embodiment of the present invention is 30%;

FIG. 9 is a graph showing the relationship between load and compression when the compression of a sample V-shaped spring according to an embodiment of the present invention is 35%;

FIG. 10 is a graph showing the relationship between load and compression when the compression of a V-shaped spring sample is 42% according to an embodiment of the present invention.

FIG. 1-strip of sheet material; 2-a notch; 3-loading curve; 4-unloading curve; 5-energy loss surface; a, opening distance values of a first long side and a second long side of the bent strip-shaped plate are obtained; c, the thickness value of the strip-shaped plate; f-width value of single gap; e-the distance value between two adjacent gaps; h₁-the value of the distance of the bottom of the notch on the first long side from the second long side; h₂-the value of the distance of the bottom of the notch on the second long side from the first long side; and R is the radius value of the arc of the cross section of the bending part in the middle of the strip-shaped plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention aims to provide a V-shaped spring and a production method thereof, and solves the technical problem that an extension spring or an O-shaped rubber ring in the prior art cannot meet the special requirement of flooding plug sealing.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

Referring to fig. 1-3, the invention provides a V-shaped spring, which is formed by bending a strip-shaped plate 1 with a plurality of notches 2 on both long sides along a central line parallel to the length direction of the plate, the plate is still strip-shaped after being bent, the cross section of the strip-shaped plate 1 is V-shaped, the bent part of the middle part is arc-shaped, the notches 2 on the first long side of the strip-shaped plate 1 and the notches 2 on the second long side of the strip-shaped plate 1 are staggered, so that when the V-shaped spring is rolled and installed in a teflon shell, the V-shaped spring is easier to form a ring, and the mechanical stress points after the ring formation are more uniformly distributed, compared with an extension spring, the V-shaped spring has high resilience, the limit compression amount can reach or exceed 40%, the limit compression amount is obviously increased, more compensation force can be provided for a flood plug sealing ring, and the elastic range of the V-shaped spring is large, the tolerance of the flooding plug seal ring can be reduced. The strip-shaped plate 1 is made of Inconel-718 alloy or Elgiloy non-magnetic alloy (Elgiloy), the Inconel718 alloy is precipitation hardening type nickel-chromium-iron alloy containing niobium and molybdenum, has high strength and good toughness at a temperature below 650 ℃, has corrosion resistance in high and low temperature environments, has high tensile strength, fatigue strength, creep strength and rupture strength at a temperature of 700 ℃, has high oxidation resistance at a temperature of 1000 ℃, has stable chemical properties at a low temperature, and has a melting temperature range of 1260-1320 ℃. The Angstrom type non-magnetic alloy is an alloy with higher strength, good oxidation resistance and corrosion resistance at the temperature of more than 650 ℃, the use temperature of the alloy is as high as 650-1000 ℃, and the Inconel-718 alloy or the Angstrom type non-magnetic alloy can resist high and low temperature, has strong corrosion resistance, good oxidation resistance and excellent heat treatment performance, can adapt to high-temperature sealing environment, and solves the technical problem that a tension spring or an O-shaped rubber ring in the prior art cannot meet the special requirement of flooding plug sealing.

Wherein, V type spring need constitute general stopper sealing washer jointly with the teflon shell, and the teflon shell is annular tubular structure, and the tip is provided with the ring channel, and in the ring channel was gone into in the outside installation of V type spring opening, V type spring complied with the lateral wall angular bend of ring channel, was located the V type spring both ends fixed connection of ring channel. The adopted materials are selected according to specific environmental conditions, and heat treatment can be selected according to special requirements such as removal of residual stress of the materials, improvement of the hardness of the materials and the like.

As an optional implementation manner of the embodiment of the present invention, the extending lengths of the notches 2 in the width direction of the strip-shaped plate 1 are all greater than half of the width of the strip-shaped plate 1, that is, the bottom of the notch 2 on the first long side of the strip-shaped plate 1 extends to a position close to the second long side in the width direction of the strip-shaped plate 1, and the bottom of the notch 2 on the second long side extends to a position close to the first long side in the width direction of the strip-shaped plate 1, so that the V-shaped spring is easier to bend into a ring shape when in use.

Furthermore, the bottom of the notch 2 is an arc surface, and compared with a plane, the arc surface can enable the bottom of the notch 2 to be in smooth transition with the side wall, so that the phenomenon that the local stress is overlarge and the notch is broken when the notch is bent is avoided.

Referring to fig. 4-9, the invention further provides a method for producing a V-shaped spring, based on the above V-shaped spring, it should be noted that what is mainly protected by the invention is a method for designing and testing a spring in the method for producing a V-shaped spring, which specifically includes the following steps:

the thickness value C of the strip-shaped plate 1 is selected according to the stress to be borne by the spring, and the thickness value C can be selected according to the previous test experience or the thickness corresponding to the stress borne by the spring of the same type.

Determining a width value K of the strip-shaped plate 1 before bending according to an opening distance value A of the first long side and the second long side of the strip-shaped plate 1 after bending, a distance value B of the first long side or the second long side and a bending position of the middle part of the strip-shaped plate 1, and a thickness value C of the strip-shaped plate 1, wherein it needs to be noted that calculating the width of the plate before bending according to parameters of the bent plate after bending is the same as a plate calculating mode in the prior art during sheet metal machining, and the description is omitted here.

According to the thickness value C of the strip-shaped plate 1, the width value F of a single notch 2, namely the gap value of the spring, is selected, the larger the thickness value C of the strip-shaped plate 1 is, the larger the width value F of the notch 2 needs to be properly increased, and the width value F of the notch 2 is always larger than the thickness value C of the strip-shaped plate 1.

According to the width value F of a single notch 2, selecting a distance value E between two adjacent notches 2, wherein the distance value E can be selected according to the value of E/F, the value of E/F can be selected according to the previous experimental experience data, and optionally, the value of E/F can be but is not limited to 2 or 3.

Determining the distance value H between the bottom of the notch 2 on the first long side and the second long side according to the distance value E between two adjacent notches 2 and the width value F of a single notch 2₁And the distance value H between the bottom of the notch 2 on the second long side and the first long side₂Wherein H is₁＝H₂，H₁And H₂The value of (A) has less influence on the mechanical properties of the spring, preferably H₁And H₂The values of (a) and (b) are the difference between the distance value E between two adjacent gaps 2 and the width value F of a single gap 2.

Determining an arc radius value R of the bending position at the middle part of the strip-shaped plate 1 according to the distance value A between the first long side and the second long side of the bent strip-shaped plate 1, wherein if the thickness is taken into consideration, R can be an outer arc radius value of the bending position at the middle part of the strip-shaped plate 1, and the arc radius value R of the cross section of the bending position at the middle part of the strip-shaped plate 1 is smaller thanThe standard compression amount is 40%, and the minimum radius value R cannot cause the strip-shaped plate 1 to be bent and broken.

According to the thickness value C of the strip-shaped plate 1, the width value K of the strip-shaped plate 1 before bending, the width value F of a single notch 2, the distance value E between two adjacent notches 2 and the distance value H between the bottom of the notch 2 on the first long side and the second long side₁The distance value H between the bottom of the notch 2 on the second long side and the first long side₂And the radius of the arc at the middle bending part of the strip-shaped plate 1Drawing a drawing for the parameter value of the value R, and processing;

and (3) extracting the finished spring product after processing as a sample, and carrying out compression experiment, endurance experiment, fatigue test and spring performance curve analysis, wherein the length of the sample is uniform and fixed length is 70mm, and the number of the samples is 5-10, and a size data table of a spring sample (V7015) is shown in figure 6.

According to the design, the spring design and development process can be standardized, the spring design method and the basis are unified, the spring design is safe and applicable, the economy and the reasonableness are realized, the design is applicable to the design stage and the experimental stage of the spring, and the perfect design specification can be used for carrying out scientific formula design on factors such as the size specification, the structure, the mechanical characteristics, the compression amount and the safety factor of the V-shaped spring according to different requirements. The spring can have the resilience force value scope of broad, through the structural dimension who changes V type spring or choose for use the strip panel 1 of different thickness, under the unchangeable prerequisite of guaranteeing the limit compression amount, the wide power value scope of acquisition that can relax. The spring is tested and evaluated to determine its characteristics and performance to ensure that it functions properly for the expected life cycle of the product.

Further, referring to fig. 7, which is a performance parameter table of a spring sample (V7015), a compression experiment is to load and unload a spring, measure the compression amount of the spring corresponding to each load value, draw a relationship diagram between the load and the compression amount of the spring, determine whether the maximum compression amount of the spring reaches 40%, and if the compression amount of the spring can reach 40%, the spring is qualified; if the compression amount of the spring cannot reach 40%, the spring is not qualified. The experimental tool may use a spring dynamometer. And measuring the corresponding maximum compression amount by taking the energy loss surface not more than 10% as a constraint condition, and selecting the maximum compression amount as a limit compression amount, wherein the energy loss surface 5 is the difference value between the area of the spring loading curve 3 and the area of the spring unloading curve 4, and the 10% energy loss surface is the percentage of the energy loss surface 5 occupying the area between the spring loading curve 3 and the abscissa axis.

Further, the endurance test is that the spring is under a specified compression amount which is mostly a limit compression amount, after the spring is kept in a compressed state for at least twenty-four hours, the size of the spring is measured, whether the size value change of the spring is within 0.1 mm or not is judged, whether the spring has obvious deformation or not is judged, and if the size value change is within 0.1 mm and no obvious deformation exists, the spring is available under the compression amount; if the dimensional change is greater than 0.1 mm and/or there is significant deformation, then the spring is unusable at that amount of compression.

Further, the fatigue degree test is that the set compression amount range is within a set compression amount range, the set compression amount range is from the limit compression amount to 6% of the limit compression amount, the spring is repeatedly loaded and unloaded, the repeated times are 1000 times, the frequency is 30s, the loading and unloading process is carried out once, after the process is finished, whether the spring is invalid or not is judged, and the failure standard is that the spring cannot keep the original state or is broken; if the spring does not fail, a compression experiment is carried out, whether the performance of the spring meets the requirement is checked, namely whether the compression amount of the spring can reach 40% is checked.

Further, referring to fig. 8-10, which are graphs of load versus compression for spring samples (V7015) at 30%, 35%, and 42%, respectively, the spring performance curve analysis included: according to the spring loading curve chart, whether the load and the compression amount of the spring are in a linear relation or not is analyzed, whether a curve appears or not and whether the slope of the curve is suddenly increased or not is checked, the ideal spring loading curve 3 should rise from a (0, 0) point in a straight line with a certain slope, the load and the compression amount are in a linear relation, and if the curve appears at first, the reason may be that the uniformity of the distance size between the first long side and the second long side of the strip-shaped plate 1 after being bent is poor. If the spring-loaded curve 3 increases steeply, i.e. the slope increases suddenly, it is that the spring opening has been flattened, i.e. the opening distance value a between the first long side and the second long side of the bent strip-shaped sheet material 1 is equal to zero.

According to the spring unloading curve chart, whether the load value of the front section of the graph suddenly drops or not and whether the rear section of the graph approximately linearly creeps are checked, and the spring unloading curve 4 is a curve which can show the relation between the load and the compression amount and is formed by the spring in the energy releasing process. At the beginning of the graph of the unloading curve 4, if the spring load is small, a sudden load drop occurs, which affects the area calculation of the energy dissipation surface 5, which may require endurance tests. Towards the end of the unloading curve 4, an approximately flat creep occurs, i.e. the slope is small, close to horizontal, indicating that the spring may have been plastically deformed. If the initial compression of the creeping section is less than 0.2mm, the deformation is acceptable.

The value of the energy loss surface 5 is determined according to the difference between the area of the spring loading curve 3 and the area of the spring unloading curve 4, the area of the spring loading curve 3 is the energy absorbed by the compression of the spring, the area of the spring unloading curve 4 is the energy released by the recovery of the spring, and the difference is the energy loss caused by other factors, wherein the reasons for causing the energy loss comprise the energy absorbed by the deformation of the spring, the energy consumed by counteracting the friction force of the system and the like.

Further, the production method of the V-shaped spring also comprises the dereferencing of other data of the spring, specifically, after the limit compression amount is measured, the load value under the limit compression amount is selected as the limit load value, similar experimental data is selected from the experimental data and is regarded as correct experimental data, the error is generally not more than plus or minus 5%, and in the correct experimental data, the closest experimental result is selected as final data.

The area of the energy loss surface 5 can be calculated from each group of experimental data, preferably, the experimental data corresponding to the limit load value is selected for calculation, and the area value of the energy loss surface 5 is obtained;

and selecting 5% of the limit compression amount as a safety coefficient, wherein the limit compression amount of the spring has a risk of possible failure, and the compression amount safety coefficient is set for avoiding the risk. The safety factor was chosen to be 5% of the limit compression. The compression amount obtained by subtracting the safety factor from the limit compression amount is determined as the rated compression amount.

In actual production, the spring output file comprises a spring drawing and a spring performance table, and the contents of specific dimensional requirement tolerance, rated compression amount, rated load value, load tolerance and the like of the spring are reflected on the spring drawing.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.