CN112729642B - Testing tool and testing method for pressure spring force value - Google Patents
Testing tool and testing method for pressure spring force value Download PDFInfo
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- CN112729642B CN112729642B CN202011437883.4A CN202011437883A CN112729642B CN 112729642 B CN112729642 B CN 112729642B CN 202011437883 A CN202011437883 A CN 202011437883A CN 112729642 B CN112729642 B CN 112729642B
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- pressure spring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0057—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to spring-shaped elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a testing tool and a testing method for a pressure spring force value, belongs to the technical field of pressure spring force value testing, and solves the problems that the pressure spring force value in the prior art is low in testing precision and is easy to collapse out in the force value testing process. The testing tool comprises a base, a sleeve arranged on the base and a force application rod used for applying pressure to a pressure spring, wherein the pressure spring is arranged on the base, in the sleeve and coaxial with the sleeve. The testing method comprises the steps that a pressure spring force measuring machine is started, and the output end of the pressure spring force measuring machine drives the movable end of a pressure spring to press down for a testing distance through a force application rod; and reading the pressure value of the compression spring force measuring machine, wherein the sum of the pressure value of the compression spring force measuring machine and the gravity of the force application rod is the force value of the compression spring downward pressing test distance. The testing tool and the testing method of the pressure spring force value can be used for testing the pressure spring force value.
Description
Technical Field
The invention belongs to the technical field of compression spring force value testing, and particularly relates to a testing tool and a testing method for a compression spring force value.
Background
Along with the development of aerospace products, the application of pressure spring parts is becoming more and more extensive, and the requirement on the type of a pressure spring is higher and higher. The pressure spring is used as a bearing part, whether the force value of the pressure spring is qualified or not is related to success or failure of aerospace product experiments, and the force value of the pressure spring is usually used as an important index for acceptance check of the pressure spring in the production of the pressure spring.
In the prior art, the compression spring force value is tested as follows: and (4) placing the compression spring on a compression spring force measuring machine, and pressing the compression spring downwards to a certain length to test the force value of the compression spring.
However, for a compression spring (especially a large-size compression spring), the compression spring can bend to one side of the periphery in the pressing process, so that the testing precision of a compression spring force value is reduced; in addition, when the pressure spring is completely pressed down and continuously pressed down, the pressure spring can be burst out to the bending side, and the pressure spring force value cannot be tested.
Disclosure of Invention
In view of the above analysis, the invention aims to provide a testing tool and a testing method for a compression spring force value, and solves the problems that the compression spring force value in the prior art is low in testing precision and the compression spring is easy to collapse in the force value testing process.
The invention is mainly realized by the following technical scheme:
the invention provides a testing tool for a pressure spring force value, which comprises a base, a sleeve arranged on the base and a force application rod used for applying pressure to the pressure spring, wherein the pressure spring is arranged on the base, in the sleeve and coaxially arranged with the sleeve.
Further, sleeve and pressure spring are all arranged in on the base, and the one end that the definition pressure spring is close to the base is the stiff end, and the one end that the base was kept away from to the pressure spring is the expansion end, and the one end of application of force stick supports the expansion end at the pressure spring, and the other end of application of force stick is connected with the output of pressure spring dynamometer.
Furthermore, lubricating layers are arranged on the inner walls of the pressure spring and the sleeve, lubricating oil is smeared on the inner walls of the pressure spring and the sleeve, and the lubricating layers are formed by adopting the lubricating oil.
Furthermore, the sleeve comprises a plurality of annular pieces and a plurality of connecting pieces, the annular pieces are arranged along the axial direction of the sleeve, two adjacent annular pieces are connected through at least two connecting pieces, the annular pieces are connected through the connecting pieces to form the sleeve with an integral structure, and a gap is reserved between the two adjacent connecting pieces.
Further, the ring-shaped member includes a band and a fastener, and both ends of the band are detachably connected by the fastener.
Furthermore, the number of the connecting pieces between two adjacent annular pieces is two, the two connecting pieces are both in a shape of at least half a turn of spiral, and the projections of the two connecting pieces in the plane of one of the annular pieces form a closed ring.
Further, the end of the annular piece and the end of the connecting piece are both provided with arc chamfers.
Further, the diameter of the base is 1.5 to 4 times (e.g., 3 times) the outer diameter of the sleeve.
Furthermore, a groove for accommodating a part of the sleeve is formed in the base, and one end of the sleeve is inserted into the groove.
Further, the groove is an annular groove.
Furthermore, the force application rod comprises a rod body and a limiting rod arranged at one end of the rod body, the limiting rod is inserted into the pressure spring, and the diameter of the limiting rod is smaller than that of the rod body.
Further, the inner diameter of the sleeve needs to be larger than the outer diameter of the compression spring, and the height of the sleeve is larger than the free height of the compression spring.
Further, the inner diameter of the sleeve needs to be larger than the outer diameter of the compression spring by 1.8 to 2.5mm (e.g., 2 mm), and the height of the sleeve is higher than the free height of the compression spring by 16 to 25mm (e.g., 20 mm).
Furthermore, the diameter of the limiting rod is smaller than the inner diameter of the pressure spring.
Further, the diameter of the limit rod is 1.6 to 2.2mm (for example, 2 mm) smaller than the inner diameter of the pressure spring.
Further, the diameter of the rod body is smaller than the inner diameter of the sleeve.
Further, the diameter of the rod is 1.6 to 2.2mm (e.g., 2 mm) smaller than the inner diameter of the sleeve.
Further, the length of the rod body needs to be 45 to 53mm (e.g., 50 mm) greater than the compression spring depression test distance.
Further, the length of the stopper rod is 18 to 22mm (e.g., 20 mm).
The invention also provides a method for testing the force value of the compression spring, which comprises the following steps:
step S1: the pressure spring is arranged on the base, in the sleeve and coaxial with the sleeve, one end of the force application rod is abutted against the pressure spring, and the other end of the force application rod is connected with the output end of the pressure spring force measuring machine;
step S2: starting a pressure spring force measuring machine, wherein the output end of the pressure spring force measuring machine drives the movable end of a pressure spring to press down for a test distance through a force application rod;
and step S3: and reading the pressure value of the compression spring force measuring machine, wherein the sum of the pressure value of the compression spring force measuring machine and the gravity of the force application rod is the force value of the compression spring downward pressing test distance.
Further, the following steps are also included between the step S1 and the step S2:
zeroing a pressure spring force measuring machine;
the zero setting position is the sum of the height of the base, the free height of the pressure spring and the height of the force application rod above the pressure spring.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
a) According to the testing tool for the pressure spring force value, provided by the invention, in the pressing-down process of the pressure spring (especially a large-size pressure spring), the pressure spring can be subjected to proper radial limiting through the arrangement of the sleeve, so that the pressure spring is prevented from being excessively bent, the testing precision of the pressure spring force value can be improved, and the problem that the pressure spring is broken out can be avoided.
b) According to the testing tool for the pressure spring force value, the lubricating layer is arranged, so that the friction force between the pressure spring and the inner wall of the sleeve can be effectively reduced, and the influence of the friction force between the pressure spring and the sleeve on the pressure spring force value is reduced.
c) According to the tool for testing the force value of the pressure spring, the sleeve is of the hollow structure, so that the contact area between the pressure spring and the sleeve can be reduced, the friction force between the pressure spring and the sleeve is reduced, and the influence of the friction force between the pressure spring and the sleeve on the force value of the pressure spring is further reduced.
d) According to the testing tool for the force value of the compressed spring, at least one point exists between two adjacent ring-shaped elements, so that the compressed spring can be axially limited, the contact area between the compressed spring and the sleeve can be reduced as much as possible on the basis of ensuring that the sleeve axially limits the compressed spring, and the influence of the friction force between the compressed spring and the sleeve on the force value of the compressed spring is further reduced.
e) According to the testing tool for the force value of the pressure spring, the limiting rod is inserted into the pressure spring, the sliding end of the pressure spring can be limited through the limiting rod, and stable connection between the pressure spring and the force application rod is guaranteed; because the diameter of the limiting rod is smaller than that of the rod body, namely a boss is formed between the limiting rod and the rod body, and the movable end of the pressure spring abuts against the boss, the force transmission between the force application rod and the pressure spring is realized; because the diameter of the rod body is larger than that of the limiting rod, in the pressing-down process of the pressure spring, the limiting rod is matched with the rod body, the radial direction of the pressure spring can be limited, and therefore the testing precision of the pressure spring force value is further improved.
f) According to the test tool for the pressure spring force value, the number of the connecting pieces between two adjacent annular pieces is two, the two connecting pieces are both in at least a half-turn spiral shape and are obliquely arranged, and the projections of the two connecting pieces in the plane of one of the annular pieces form a closed ring shape, so that at least one point can axially limit the pressure spring between the two adjacent annular pieces, and therefore on the basis that the sleeve can axially limit the pressure spring, the contact area between the pressure spring and the sleeve can be reduced as much as possible, and further the influence of the friction force between the pressure spring and the sleeve on the pressure spring force value is reduced. In addition, as the two connecting pieces can form at least one circle of spiral shape, when the inner diameter of the annular piece is adjusted to adapt to the pressure springs with different sizes, the spiral connecting pieces can generate certain elastic deformation similar to a torsion spring, so that the connecting pieces can always keep the spiral shape.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments and are not to be considered limiting of the invention.
Fig. 1 is a front view of a testing tool for a compression spring force value according to an embodiment of the present invention;
fig. 2 is a top view of a testing tool for a compression spring force value according to a first embodiment of the present invention;
fig. 3 is a front view of a force application rod in the testing tool for the force value of the compression spring according to the first embodiment of the present invention;
fig. 4 is a top view of a force application rod in the testing tool for the force value of the compression spring according to the first embodiment of the present invention;
fig. 5 is a schematic view illustrating unfolding of a sleeve in a testing tool for a compression spring force value according to an embodiment of the present invention;
fig. 6 is a top perspective view of a sleeve in the testing tool for a compression spring force value according to an embodiment of the present invention.
Reference numerals are as follows:
1-a base; 2-a sleeve; 21-an annular member; 22-a connector; 3, pressing a spring; 4-a force application rod; 41-rod body; 42-a limit rod.
Detailed Description
The preferred invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the description serve to explain the principles of the invention.
Example one
The embodiment provides a test fixture for a pressure spring force value, see fig. 1 to 6, which includes a base 1, a sleeve 2 and a force application rod 4, wherein the sleeve 2 is disposed on the base 1, the force application rod 4 is used for applying pressure to the pressure spring 3, and the pressure spring 3 is disposed on the base 1, in the sleeve 2, and coaxially disposed with the sleeve 2.
Specifically, the sleeve 2 and the pressure spring 3 are arranged on the base 1, one end, close to the base 1, of the pressure spring 3 is defined as a fixed end, one end, far away from the base 1, of the pressure spring 3 is defined as a movable end, one end of the force application rod 4 abuts against the movable end of the pressure spring 3, and the other end of the force application rod 4 is connected with an output end of a force measuring machine of the pressure spring 3.
During implementation, the force measuring machine of the pressure spring 3 is zeroed, the pressure machine is started, the output end of the force measuring machine of the pressure spring 3 drives the movable end of the pressure spring 3 to press down for a test distance through the force applying rod 4, the pressure value of the force measuring machine of the pressure spring 3 is read, and the sum of the pressure value of the force measuring machine of the pressure spring 3 and the gravity of the force applying rod 4 is the force value of the press-down test distance of the pressure spring 3.
Compared with the prior art, the test fixture of the pressure spring power value that this embodiment provided can carry out suitable radial spacing to pressure spring 3 through the setting of sleeve 2 at the screw-down in-process of pressure spring 3 (especially jumbo size pressure spring 3), avoids pressure spring 3 to take place excessive bending, not only can improve the 3 power value measuring accuracy of pressure spring, can also avoid pressure spring 3 to take place the problem of collapsing.
It should be noted that, in the process of pressing down the pressure spring 3, the friction force between the pressure spring 3 and the sleeve 2 may affect the force value of the pressure spring 3, and therefore, the inner walls of the pressure spring 3 and the sleeve 2 are both provided with a lubricating layer, for example, lubricating oil may be applied to the inner walls of the pressure spring 3 and the sleeve 2, and the lubricating layer is formed by using the lubricating oil. Like this, the setting of lubricant film can effectively reduce the frictional force between the inner wall of pressure spring 3 and sleeve 2 to reduce the influence of the frictional force between pressure spring 3 and the sleeve 2 to the 3 power values of pressure spring.
In order to further reduce the influence of the friction force between the compression spring 3 and the sleeve 2 on the force value of the compression spring 3, the structure of the sleeve 2 may specifically include a plurality of ring members 21 and a plurality of connecting members 22, the plurality of ring members 21 are arranged along the axial direction of the sleeve 2, two adjacent ring members 21 are connected by at least two connecting members 22, the plurality of ring members 21 are connected by the plurality of connecting members 22 to form the sleeve 2 of an integral structure, and a gap is provided between two adjacent connecting members 22. This is because, sleeve 2 adopts the structure of fretwork, can reduce the area of contact between pressure spring 3 and the sleeve 2 to reduce frictional force between the two, and then reduce the influence of the frictional force between pressure spring 3 and the sleeve 2 to the pressure spring 3 power value.
In order to make above-mentioned sleeve 2 can adapt to the power value test of multiple size pressure spring 3, above-mentioned loop forming element 21 includes strip and fastener, and the connection can be dismantled through the fastener in the both ends of strip, can adjust the internal diameter of the loop forming element that the strip constitutes through the overlap joint length at strip both ends, guarantees that the clearance between sleeve 2 and the pressure spring 3 keeps in appropriate range for sleeve 2 can adapt to the power value test of multiple size pressure spring 3.
In order to reduce the influence of the friction force between the pressure spring 3 and the sleeve 2 on the force value of the pressure spring 3 as much as possible on the basis of ensuring that the sleeve 2 axially limits the pressure spring 3, the number of the connecting pieces 22 between two adjacent annular pieces 21 is two, the two connecting pieces 22 are both in at least half-turn spiral shapes and are obliquely arranged, and the projections of the two connecting pieces 22 in the plane of one of the annular pieces 21 form a closed ring shape, so that at least one point is arranged between the two adjacent annular pieces 21 to axially limit the pressure spring 3, so that the contact area between the pressure spring 3 and the sleeve 2 is reduced as much as possible on the basis of ensuring that the sleeve 2 axially limits the pressure spring 3, and the influence of the friction force between the pressure spring 3 and the sleeve 2 on the force value of the pressure spring 3 is reduced. Furthermore, since the two connecting members 22 can form at least one spiral, when the inner diameter of the annular member 21 is adjusted to accommodate compression springs 3 of different sizes, the spiral connecting member 22 can be elastically deformed to a certain extent like a torsion spring, so that the connecting member 22 can always maintain a spiral shape.
In order to prevent the compressed spring 3 from being clamped in the hollow of the sleeve 2 (namely between two adjacent ring-shaped members 21, between two adjacent connecting members 22 and between the ring-shaped members 21 and the connecting members 22) in the process of pressing down the compressed spring 3, the end portions of the ring-shaped members 21 and the end portions of the connecting members 22 are provided with arc-shaped chamfers. In the pressing-down process of the pressure spring 3, the arc-shaped chamfers are arranged to guide the movement of the pressure spring 3, so that the pressure spring can smoothly test the distance under the ground pressure.
It should be noted that, the sleeve 2 is placed on the base 1, and in order to ensure that the sleeve 2 can stand stably, the diameter of the base 1 increases with the height and the outer diameter of the sleeve 2, and the diameter of the base 1 is exemplarily 1.5 to 4 times (e.g., 3 times) the outer diameter of the sleeve 2. Like this, place sleeve 2 on base 1 that has sufficient size and area, can avoid sleeve 2 to take place to rock or even topple over to guarantee that sleeve 2 can stably stand upright.
In order to ensure that the sleeve 2 can stand stably, besides optimizing the diameter of the base 1, the connecting structure between the base 1 and the sleeve 2 can be improved. Particularly, base 1 can be seted up on and be used for holding sleeve 2 and be close to the recess of base 1 one end, for example, the annular groove, and the recess is inserted to sleeve 2's one end, like this, through the cell wall of recess and the interact between the sleeve, can reduce rocking of sleeve 2 to further guarantee that sleeve 2 can stably stand upright.
In order to ensure the stable connection between the force application rod 4 and the compression spring 3, the structure of the force application rod 4 may specifically include a rod body 41 and a limit rod 42 arranged at one end of the rod body 41, wherein the limit rod 42 is inserted into the compression spring 3, and the diameter of the limit rod 42 is smaller than that of the rod body 41. On the first hand, the limiting rod 42 is inserted into the pressure spring 3, and the sliding end of the pressure spring 3 can be limited through the limiting rod 42, so that the stable connection between the pressure spring 3 and the force application rod 4 can be ensured; in the second aspect, because the diameter of the limit rod 42 is smaller than that of the rod body 41, a boss is formed between the limit rod 42 and the rod body 41, and the movable end of the pressure spring 3 abuts against the boss, so that the force transmission between the force application rod 4 and the pressure spring 3 is realized; in the third aspect, because the diameter of the rod body 41 is larger than that of the limiting rod 42, in the pressing-down process of the pressure spring 3, the limiting rod 42 is matched with the rod body 41, and the radial direction of the pressure spring 3 can be limited, so that the testing accuracy of the force value of the pressure spring 3 is further improved.
It can be understood that, from outside to inside, sleeve 2, pressure spring 3 and stopper 42 registrate in proper order, and the condition that can't registrate is produced in order to avoid interfering between the three, makes sleeve 2 can adapt to pressure spring 3, can not cause too big influence to the compression of pressure spring 3, and the internal diameter of sleeve 2 needs to be greater than the external diameter (including the tolerance on the external diameter) of pressure spring 3, and the height of sleeve 2 is higher than the free height (including the tolerance on the free height) of pressure spring 3. Illustratively, the inner diameter of the sleeve 2 needs to be larger than the outer diameter of the compression spring 3 by 1.8 to 2.5mm (e.g., 2 mm), and the height of the sleeve 2 is higher than the free height of the compression spring 3 by 16 to 25mm (e.g., 20 mm). Thus, the difference between the inner diameter of the sleeve 2 and the outer diameter of the compression spring 3 is limited within the above range, so that the gap between the sleeve 2 and the compression spring 3 can be reduced as much as possible on the basis of ensuring that the sleeve and the compression spring do not interfere with each other, thereby further reducing the bending amplitude of the compression spring 3 in the pressing process.
Regarding the magnitude relationship between the diameter of the stopper rod 42 and the inner diameter of the compression spring 3, the diameter of the stopper rod 42 needs to be smaller than the inner diameter of the compression spring 3, and the diameter of the stopper rod 42 is exemplarily 1.6 to 2.2mm (e.g., 2 mm) smaller than the inner diameter (including the lower tolerance of the inner diameter) of the compression spring 3. Like this, inject the difference of the internal diameter of the diameter ratio pressure spring 3 of stopper rod 42 in above-mentioned within range, can guarantee on the basis that can not take place to interfere between stopper rod 42 and the pressure spring 3, the clearance between the two of minimizing to guarantee the overall stability of the test fixture of above-mentioned pressure spring power value.
Regarding the magnitude relationship between the diameter of the rod 41 and the inner diameter of the sleeve 2, it is required that the diameter of the rod 41 is smaller than the inner diameter of the sleeve 2, and illustratively, the diameter of the rod 41 is 1.6 to 2.2mm (e.g., 2 mm) smaller than the inner diameter of the sleeve 2. Thus, the difference between the diameter ratio of the rod body 41 and the inner diameter of the sleeve 2 is limited within the range, so that the gap between the rod body 41 and the sleeve 2 can be reduced as much as possible on the basis of ensuring that the interference does not occur between the rod body and the sleeve, and the overall stability of the testing tool for the pressure spring force value is ensured.
In order to ensure that the force application rod 4 can press down the compression spring 3 by a test distance, the length of the rod body 41 needs to be 45 to 53mm (e.g., 50 mm) greater than the test distance for pressing down the compression spring 3.
Similarly, in order to ensure stable connection between the stopper rod 42 and the pressure spring 3, the stopper rod 42 has a length of 18 to 22mm (e.g., 20 mm).
Example two
The embodiment also provides a method for testing the pressure spring force value, which comprises the following steps:
step S1: the pressure spring is arranged on the base, in the sleeve and coaxial with the sleeve, one end of the force application rod is abutted against the pressure spring, and the other end of the force application rod is connected with the output end of the pressure spring force measuring machine;
step S2: starting a pressure spring force measuring machine, wherein the output end of the pressure spring force measuring machine drives the movable end of a pressure spring to press down for a test distance through a force application rod;
and step S3: and reading the pressure value of the compression spring force measuring machine, wherein the sum of the pressure value of the compression spring force measuring machine and the gravity of the force application rod is the force value of the compression spring downward pressing test distance.
Compared with the prior art, the beneficial effect of the method for testing the compression spring force value provided by the embodiment is basically the same as that of the tool for testing the compression spring force value provided by the embodiment, and is not repeated here.
In order to ensure the accuracy of the pressure value tested by the pressure spring dynamometer, the method between the step S1 and the step S2 further comprises the following steps:
and zeroing the pressure spring force measuring machine.
Specifically, the zero setting position is at the height which is the sum of the height of the base, the free height of the pressure spring and the height of the force application rod above the pressure spring.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (7)
1. The testing tool for the pressure spring force value is characterized by comprising a base, a sleeve arranged on the base and a force application rod for applying pressure to a pressure spring;
when the device is implemented, the pressure spring is arranged on the base, in the sleeve and coaxial with the sleeve;
the sleeve comprises a plurality of annular pieces and a plurality of connecting pieces, the annular pieces are arranged along the axial direction of the sleeve, two adjacent annular pieces are connected through at least two connecting pieces, and a gap is formed between the two adjacent connecting pieces;
the annular part comprises a strip material and a fastener, two ends of the strip material are detachably connected through the fastener, and the inner diameter of the annular part formed by the strip material is adjusted through the overlapping length of the two ends of the strip material;
the number of the connecting pieces between two adjacent annular pieces is two, the two connecting pieces are both in a shape of at least half-turn spiral, and the projections of the two connecting pieces in one annular piece plane form a closed ring; the two connecting pieces form at least one circle of spiral shape, and when the inner diameter of the annular piece is adjusted, the spiral connecting pieces are elastically deformed, so that the connecting pieces are always kept in the spiral shape;
the tip of annular member and the tip of connecting piece all are equipped with arc chamfer.
2. A testing tool for a pressure spring force value according to claim 1, wherein the inner walls of the pressure spring and the sleeve are provided with lubricating layers.
3. A tool for testing a compression spring force value according to claim 1, wherein a groove for accommodating one end of the sleeve close to the base is formed in the base, and one end of the sleeve is inserted into the groove.
4. A tool for testing a force value of a compression spring according to claim 1, wherein the force application rod comprises a rod body and a limiting rod arranged at one end of the rod body, the limiting rod is inserted into the compression spring, and the diameter of the limiting rod is smaller than that of the rod body.
5. The tool for testing the force value of the pressure spring according to any one of claims 1 to 4, wherein the inner diameter of the sleeve is larger than the outer diameter of the pressure spring, and the height of the sleeve is higher than the free height of the pressure spring.
6. A method for testing a compression spring force value is characterized in that the compression spring force value testing tool of any one of claims 1 to 5 is adopted, and the method comprises the following steps:
step S1: the pressure spring is arranged on the base, in the sleeve and coaxial with the sleeve, one end of the force application rod is abutted against the pressure spring, and the other end of the force application rod is connected with the output end of the pressure spring force measuring machine;
step S2: starting a pressure spring force measuring machine, wherein the output end of the pressure spring force measuring machine drives the movable end of a pressure spring to press down for a test distance through a force application rod;
and step S3: and reading the pressure value of the pressure spring force measuring machine, wherein the sum of the pressure value of the pressure spring force measuring machine and the gravity of the force application rod is the force value of the downward pressing test distance of the pressure spring.
7. The method for testing the force value of the compression spring according to claim 6, wherein the step S1 and the step S2 further comprise the following steps:
zeroing a pressure spring force measuring machine;
the height of the zero setting position is the sum of the height of the base, the free height of the pressure spring and the height of the force application rod above the pressure spring.
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|---|---|---|---|---|
| LU47687A1 (en) * | 1964-01-03 | 1965-03-02 | ||
| CN108982209A (en) * | 2018-07-19 | 2018-12-11 | 西南交通大学 | A kind of specimen holder device of major diameter split hopkinson press bar |
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|---|---|
| CN112729642A (en) | 2021-04-30 |
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