CN114112368A

CN114112368A - Spring testing device and method

Info

Publication number: CN114112368A
Application number: CN202111471272.6A
Authority: CN
Inventors: 刘凯凯; 杨历军; 肖启冬; 梁淑红
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-01
Anticipated expiration: 2041-12-03
Also published as: CN114112368B

Abstract

The embodiment of the invention provides a spring testing device and a method, wherein the spring testing device comprises: a base; the guide pipe is arranged on the base and used for accommodating and fixing the spring to be tested; and the first sliding part is arranged on the base and can at least partially enter the guide pipe and be connected with the spring to be tested, so that the first sliding part stretches and/or compresses the spring to be tested when sliding to perform stretching and/or compression testing on the spring to be tested. According to the spring testing device and method provided by the embodiment of the invention, the safety and accuracy of the spring test can be ensured.

Description

Spring testing device and method

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a spring testing device and a spring testing method.

Background

The spring is a relatively common part, before the spring is applied to relevant equipment, the performance of the spring is generally required to be tested, the test items can include compression test, tensile test and the like, and the spring testing device in the prior art has low test result accuracy and test safety when testing, particularly when testing springs with long lengths.

Disclosure of Invention

In view of the above, the present invention has been made to provide a spring testing apparatus and a spring testing method that overcome or at least partially solve the above problems.

According to a first aspect of the present invention, there is provided a spring testing apparatus comprising: a base; the guide pipe is arranged on the base and used for accommodating and fixing the spring to be tested; and the first sliding part is arranged on the base and can at least partially enter the guide pipe and be connected with the spring to be tested, so that the first sliding part stretches and/or compresses the spring to be tested when sliding to perform stretching and/or compression testing on the spring to be tested.

According to a second aspect of the present invention, there is provided a spring testing method comprising: determining the length variation range of the spring to be tested in the stretching and/or compressing test; selecting the length of a guide pipe according to the length change range, wherein the guide pipe is used for accommodating the spring to be tested; placing the spring to be tested in a lumen of the catheter and fixing the spring to the catheter; connecting the spring to be tested with a first sliding part, wherein the first sliding part is used for stretching and/or compressing the spring to be tested through sliding; determining the sliding range of the first sliding piece according to the length change range; and controlling the first sliding piece to slide for a preset number of times according to the sliding range so as to finish the tension and/or compression test of the spring to be tested.

According to the spring testing device and method provided by the embodiment of the invention, the safety and accuracy of the spring test can be ensured.

Drawings

FIG. 1 is a schematic diagram of a spring testing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a connection manner of a spring to be tested, a fixed member and a first sliding member according to an embodiment of the invention;

FIG. 3 is a schematic view of another connection method of a spring to be tested, a fixing member and a first sliding member according to an embodiment of the invention;

FIG. 4 is a schematic view of a first slider according to an embodiment of the present invention;

fig. 5 is a schematic view of a second slider according to an embodiment of the present invention.

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 clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. If the description "first", "second", etc. is referred to throughout, the description of "first", "second", etc. is used only for distinguishing similar objects, and is not to be construed as indicating or implying a relative importance, order or number of technical features indicated, it being understood that the data described in "first", "second", etc. may be interchanged where appropriate. If "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B" and including either scheme A, or scheme B, or schemes in which both A and B are satisfied. Furthermore, spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein for ease of description to describe one element or feature's spatial relationship to another element or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures.

There is first provided a spring testing apparatus according to an embodiment of the present invention, referring to fig. 1, including: the testing device comprises a base 10, a guide pipe 20 and a first sliding part 40, wherein the guide pipe 20 is arranged on the base 10 and is used for accommodating and fixing a spring to be tested, the first sliding part 40 is arranged on the base 10, and the first sliding part 40 can at least partially enter the guide pipe 20 and is connected with the spring to be tested, so that the first sliding part 40 stretches and/or compresses the spring to be tested when sliding to test the tension and/or compression of the spring to be tested.

The base 10 is used for supporting the conduit 20 and the first sliding member 40, in some embodiments, the base 10 may include a support frame and a support surface, the conduit 20 and the first sliding member 40 may be disposed on the support surface of the base 10, and the support surface may be disposed in a horizontal direction or a vertical direction, that is, the spring testing device may be a vertical type or a horizontal type, and those skilled in the art may set the spring testing device according to actual requirements.

The guide pipe 20 is used for accommodating and fixing a spring to be tested, specifically, one end of the spring to be tested can be fixed at one end of the guide pipe 20, the guide pipe 20 can provide guiding and protecting effects for the spring to be tested in the spring testing process, the spring to be tested can be guided in the testing process, radial shaking or interference caused by forces except the first sliding part 40 in the compression and/or stretching process of the spring to be tested can be avoided, the accuracy of a testing result is ensured, and the guiding effect is particularly important when the length of the spring to be tested is long. Meanwhile, if the spring to be tested is damaged by fracture, deformation and the like in the compression and/or stretching process, the guide pipe 20 can prevent the damaged spring from shifting, and the safety of a spring testing device and testing personnel is ensured.

The first slider 40 is used for tensile and/or compressive testing of a spring to be tested by sliding, and the first slider 40 may enter the guide tube 20 at least partially and be connected with the spring to be tested, for example, one end of the spring to be tested may be connected with the guide tube 20 and the other end may be connected with the first slider 40. The first sliding member 40 may drive the spring to be tested to slide when sliding, so as to perform a tensile test and/or a compression test on the spring to be tested, the tensile test may refer to stretching the spring to be tested from an original length to a preset length and then returning to the original length, after several times of such stretching, checking whether the spring to be tested has abnormalities such as deformation, fracture, and change of elastic coefficient, the tensile test may also be a drawing limit test, for example, testing the change of elastic coefficient of the spring when the spring is stretched to different lengths, the compression test may refer to compressing the spring to be tested from the original length to the preset length and then returning to the original length, and after several times of such stretching, checking whether the spring to be tested has abnormalities such as deformation, fracture, change of elastic coefficient, and the like, the compression test may also be a compression limit test. The tensile test and the compression test may be performed separately or simultaneously, and those skilled in the art may perform the tensile test and/or the compression test by setting the sliding range of the first sliding member,

in some embodiments, still referring to FIG. 1, the spring testing apparatus further includes a securing member 30, the securing member 30 for securing the spring to be tested in the conduit. The fixing member 30 may be disposed inside the guide tube 20, for example, the fixing member 30 may be in a plug shape and disposed at an opening of one end of the guide tube 20, and the fixing member 30 is connected to one end of the spring to be tested to fix the spring to be tested in the guide tube 20. The fixing member 30 may also be disposed outside the opening of one end of the guide tube 20 and coupled with the base 10.

The connection manner of the fixing member 30 and the spring to be tested may depend on specific test items, for example, when performing a spring compression test, the fixing member 30 needs to provide a support for the spring to be tested, and in this case, referring to fig. 2, the fixing member 30 may have a cylindrical connection structure, which may be inserted into the spring and be in interference fit with the spring, such an installation manner is convenient, and a stable support may be provided for the spring to be tested. When a spring tension test is performed, the fixing member 30 needs to provide a tensile force for resisting the tension of the first sliding member 40 for the spring to be tested, and at this time, referring to fig. 3, an annular connection structure may be disposed on the fixing member 30, and one end of the spring to be tested may have a fixing structure such as a drag hook, and the drag hook at one end of the spring to be tested is clamped to the annular connection structure on the fixing member 30, so that the fixing member 30 can provide the tensile force for the spring to be tested in the tension test, and the connection between the spring to be tested and the fixing member 30 is prevented from being broken due to the tensile force caused by the sliding of the first sliding member 40.

In some embodiments, when the tensile test and the compression test of the spring need to be performed simultaneously, the connection between the fixing member 30 and the spring to be tested needs to provide both pressure and tension for the spring to be tested, at this time, one end of the spring to be tested and the fixing member 30 can be connected in a relatively stable fixing manner such as a bolt and welding, although the installation steps of the device may be complicated, the tensile test and the compression test can be performed simultaneously, the diversified test requirements are met, and the test efficiency is improved.

Similarly, referring still to fig. 2 and 3, the connection mode between the first sliding member 40 and the spring to be tested may also adopt one of the connection modes described above according to specific test items, although the first sliding member 40 and the fixed member 30 adopt the same connection mode to connect with the spring to be tested in the embodiment shown in fig. 2 and 3, and in some embodiments, the first sliding member and the fixed member may also adopt different connection modes, and a person skilled in the art may select a suitable connection mode according to actual requirements, which is not particularly limited.

In some embodiments, the catheter 20 may be configured such that the spring to be tested is always within the lumen of the catheter 20 during the tension and/or compression testing, thereby further ensuring the accuracy and safety of the test. In some embodiments, this function can be achieved by providing the conduit 20 with a longer length, in which case it will be understood that a longer length of the conduit 20 means that more springs to be tested can be accommodated, but such an arrangement requires a corresponding increase in the slidable range of the first slide 40 and makes the apparatus more bulky. In some embodiments, the above function can be achieved by providing a plurality of guide tubes 20, and a person skilled in the art can select a guide tube 20 with a suitable length according to the length variation range of the spring to be tested and install the guide tube 20 on the base 10, and when the length variation range of the spring to be tested is changed or when the spring to be tested of another specification needs to be tested, the guide tube 20 is replaced correspondingly, so as to ensure that the spring to be tested can be always in the cavity of the guide tube 20 during the testing process. In some embodiments, the above function may also be achieved by providing a retractable conduit 20, for example, the conduit 20 may include a plurality of sections of tubular structures slidably coupled to one another, and the length of the conduit 20 may be varied by sliding the tubular structures relative to one another to accommodate the testing requirements of different gauges of springs to be tested. Those skilled in the art can also implement the above functions in other setting manners, which are not described herein again.

In some embodiments, the guide tube 20 is in clearance fit with the spring to be tested, for example, the diameter of the guide tube 20 may be set to be slightly larger than the diameter of the spring to be tested, so as to improve the guiding effect and avoid friction between the spring to be tested and the guide tube 20, and a person skilled in the art may set the size of the clearance according to actual working requirements. In some embodiments, the above function may also be achieved by providing a plurality of guide tubes 20, with guide tubes 20 of appropriate length and diameter being selected and mounted on base 10 according to the diameter of the spring to be tested and the range of length variations of the spring to be tested during testing. In some embodiments, the above-described functionality may also be achieved by providing a variable diameter catheter 20. In some embodiments, the guide tube 20 may be configured to have a wider diameter to accommodate more spring gauges to be tested, but such a configuration may result in too much clearance between the guide tube 20 and the spring to be tested and thus poor guidance when testing certain springs to be tested having a smaller diameter.

In some embodiments, the spring tester further includes a first mount 51 and a second mount 52, the first mount 51 and the second mount 52 being used to connect the conduit 20 with the base 10, and in particular, referring to fig. 1, the first mount 51 and the second mount 52 may be disposed on the base 10 and connected with the conduit 20. The conduit 20 can be more conveniently connected to the base 10 by providing the first and

second supports

51, 52, and in some embodiments in which the conduit 20 needs to be replaced according to the specifications of the spring to be tested, the first and

second supports

51, 52 can facilitate the installation and removal of the conduit 20.

In some embodiments, the fixing member 30 is disposed in the guide tube 20, so that when the first sliding member 40 stretches and compresses the spring to be tested, a pulling force and a pushing force are generated on the fixing member 30 accordingly, and further on the guide tube 20, so that stability of the guide tube 20 needs to be ensured, and at this time, the first support 51 and the second support 52 can be disposed near two ends of the guide tube 20, respectively, so as to provide more stable support and fixation for the guide tube 20. The first and

second anchors

51, 52 may be connected to the conduit 20 by a connection means such as a pipe clamp. In some embodiments where it is desired to select a conduit 20 with different pipe diameters according to the diameter of the spring to be tested, an appropriate pipe clamp can be selected accordingly according to the pipe diameter of the conduit 20 for connection.

In some embodiments, at least one of the first and

second supports

51, 52 is configured to be slidably coupled to the base 10, such that when a different length of conduit 20 is desired to be installed, depending on the diameter of the spring to be tested, or the conduit 20 is configured to be variable in length, the position of the first and/or

second supports

51, 52 can be slidably adjusted to accommodate different lengths of conduit 20.

In some embodiments, referring to fig. 1, the first slider 40 may include a guide rod 41 and a driving member 42, the driving member 42 is in driving connection with the guide rod 41, and the guide rod 41 can enter the guide tube 20 and be connected with the spring to be tested to slide and stretch and/or compress the spring to be tested under the driving of the driving member 42. The driving member 42 may be a motor, an air cylinder, or the like, and may be fixed to the base 10, and the guide rod 41 may be rod-shaped and disposed along the axial direction of the guide tube 20 so as to be movable along the axial direction of the guide tube 20 by the driving member 42. The guide rod 41 can be connected to the spring to be tested by the above-described connection method, and the detailed description thereof is omitted. Unlike the springs to be tested, the diameter of guide rod 41 may be much smaller than the diameter of catheter 20 to avoid collision between guide rod 41 and catheter 20 in the event of failure of the drive or the like, resulting in damage to the spring testing device. In some embodiments, the length of guide rod 41 may be set according to the length of catheter 20, and in some embodiments where multiple catheters 20 are provided, multiple guide rods 41 may likewise be provided to accommodate catheters 20 of different lengths. Likewise, in some embodiments, guide rod 41 may also be configured to have a variable length to accommodate catheters 20 of different lengths.

In some embodiments, in order to further ensure the accuracy of the test, referring to fig. 4, the first sliding member 40 may further include a guide rail 43 and an adapter plate 44, the guide rail 43 is disposed on the base 10, the adapter plate 44 is slidably connected to the guide rail 43, and the driving member 42 is drivingly connected to the guide rod 41 through the adapter plate 44. In such an embodiment, the driving member 42 drives the adapter plate 44 to move along the guide rail 43, the movement of the adapter plate 44 drives the guide rod 41 to move, and the guide rail 43 can provide a guiding function for the sliding of the adapter plate 44, so that a guiding function is indirectly provided for the movement of the guide rod 41, the stability of the stress direction of the spring to be tested is ensured, and the spring to be tested is further prevented from shaking in the testing process. The driving member 42 may drive the adapter plate 44 to move along the guide rail 43 by a suitable driving method, for example, the driving member 42 may be connected to the adapter plate 44 by a driving shaft, or the driving member 42 may be connected to a lead screw by a bearing or the like, and connect the lead screw to the adapter plate 44 to drive the adapter plate 44 to slide, the lead screw may be disposed along the guide rail 43, and it may also provide a guiding function for the movement of the adapter plate 44, thereby further preventing the spring to be tested from shaking.

In some embodiments, the guide rod 41 may be connected to the middle of the adapter plate 44, and the guide rod 41 may be located above the guide rail 43, and in order to fit the guide rod 41, the guide tube 20 needs to be arranged in a substantially straight line with the guide rail 43, and since the guide tube 20 and the guide rail 43 have a certain installation gap, the slidable range of the guide rod 41 may not be fully utilized in some cases. For this reason, in some embodiments, referring to fig. 4, the guide rod 41 may be attached at an edge position of the adapter plate 44 such that the guide rod 41 is located at a side of the guide rail 43, and thus the guide tube 20 may also be disposed at a side of the guide rail 43, and its installation position is not limited by the guide rail 43, so that the test can be performed by making full use of the slidable range of the guide rod 41.

In some embodiments, still referring to fig. 4, the first sliding member 40 may further include a first positioning member 45 and a second positioning member 46, and the first positioning member 45 and the second positioning member 46 are disposed on the base 10 and located at both sides of the adapting plate 44 to limit the sliding range of the adapting plate 44 between the first positioning member 45 and the second positioning member 46. It will be appreciated that the range of sliding of the adapter plate 44 is determined by the range of variation of the length of the spring to be tested. In some embodiments, the first positioning member 45 and the second positioning member 46 may not be provided, and the sliding range of the transfer plate 44 may be limited by a processor of the driving member 42 or the like. It should be noted that, here and in the following related description, the slidable range of the first slider 40 may refer to the maximum movable interval of the first slider, and the slidable range of the first slider 40 refers to the movable interval of the first slider 40 set to meet the requirement of the spring test.

In some embodiments, the manner in which the driving member 42 drives the adapter plate 44 may vary according to the test items, for example, when testing the rate of change of the spring constant of the spring to be tested in tension and/or compression, the breakage rate, etc., it may be necessary to perform the same degree of tension and/or compression for a plurality of times, and in this case, the driving member 42 may be configured to drive the adapter plate 44 to slide back and forth between the first positioning member 45 and the second positioning member 46 to perform the plurality of times of tension and/or compression on the spring to be tested. In some embodiments, the extent of extension and/or compression of the spring under test may not be the same each time the extent of extension and/or compression is tested, requiring a corresponding change in the drive pattern of the driver 42.

In some embodiments, the first positioning member 45 and the second positioning member 46 can be slidably connected to the base 10 to change the limitation of the sliding range of the rotary plate 44, so that different tests can be more conveniently performed on the springs to be tested, or different specifications of the springs to be tested can be more conveniently performed.

In some embodiments, the first positioning member 45 and the second positioning member 46 may also be disposed on the guide rail 43. Likewise, the first positioning member 45 and the second positioning member 46 may be slidably connected to the guide rail 43 in such an embodiment.

In some embodiments, first slider 40 further includes a controller 47, and controller 47 may be used to control the sliding distance of guide rod 41 and/or to record the number of slides of guide rod 41. In some embodiments, the controller 47 may cooperate with the first positioning member 45 and the second positioning member 46 to limit the sliding distance of the guide rod 41. In some embodiments, the controller 47 may be configured to record the number of slides of the rail 41 when the spring to be tested is required to be stretched and/or compressed multiple times within the same range, thereby controlling the drive member 42 to stop driving after a predetermined number of stretches and/or compressions have been performed. The controller 47 may be electrically connected to the driving member 42 and configured with a wireless receiver so that an operator may remotely control the controller 47 and indirectly control the driving member 42 via the controller 47, in some embodiments, the controller 47 may also control the driving member 42 via a wireless connection.

In some embodiments, the controller 47 may also be configured to record the sliding distance of the guide rod 41, and the difference between the sliding distance of the guide rod 41 and the sliding distance of the control guide rod 41 is that the sliding distance of the guide rod 41 in the current sliding is recorded after each sliding, and it can be understood that although the sliding range of the first sliding member 40 may be limited by using the first positioning member 45 and the second positioning member 46, the sliding distance of the guide rod 41 in each sliding may have a small difference, so that the distance that the guide rod 41 moves in each sliding may be recorded by the controller 47, and after the test is finished, the distances may be counted, and when the deviation of the moving distance of the guide rod 41 is large, the test result of the current time may be optionally discarded, or in some embodiments, the test result may be corrected according to the deviation of the moving distance of the guide rod 41.

In some embodiments, the first slider 40 may further include a speed reducer (not shown), which can make the sliding of the guide rod 41 more smooth and the sliding speed more uniform, so as to avoid the inaccurate test result caused by the uneven force applied during the stretching and/or compressing process of the spring.

In some embodiments, referring to fig. 5, the spring testing apparatus may further include a second slider 60, wherein the second slider 60 is configured to slide the first slider 40 to change the relative position of the first slider 40 and the catheter 20. The second slider 60 may drive the first slider 40 to move integrally, for example, the second slider 60 may be mounted on the base 10 and configured with a support, and the first slider 40 is mounted on the support, so that the second slider 60 may drive the support to slide to move the first slider 40 integrally relative to the base 10.

In some embodiments, the second slider 60 may be used to adjust the first slider 40 to a position more suitable for working according to the length variation range of the spring to be tested, for example, if the first slider 40 slides all the time at the limit of the slidable range, the power device such as a motor may be lost, and at this time, the relative position of the first slider 40 and the conduit 20 may be adjusted to enable the first slider 40 to slide in a more reasonable interval, so as to avoid the loss of the motor.

In some embodiments, the second slider 60 may also be used to increase the slidable range of the guide rod 41, and it is understood that there is a limitation on the slidable range of the first slider 40, for example, in some embodiments, the slidable range of the first slider 40 is determined by the guide rail 43 or the driving member 42, and the slidable range may not meet the testing requirement of the spring to be tested in some cases, at this time, during testing, the first slider 40 may be driven to slide integrally by the second slider 60 and cooperate with the sliding of the first slider 40 itself to increase the slidable range of the first slider 40, so as to test the spring with a longer length or a shorter length.

When the second sliding member 60 slides in cooperation with the first sliding member 40, one of the two sliding members may be configured to slide first, and the other sliding member may be configured to slide after the sliding is finished, or both sliding members may be configured to slide simultaneously, and those skilled in the art may complete the sliding in cooperation between the two sliding members by setting a reasonable sliding rule, so that the first sliding member 40 can slide within a desired sliding range.

The specific structure of the second slider 60 can be referred to the first slider 40, for example the second slider 60 can comprise a second driving member, which is in driving connection with the support member. In some embodiments, the second sliding member 60 may further include a second sliding rail and a second adapter plate, the second driving member is in transmission connection with the support frame through the adapter plate, and the second sliding rail provides a guiding function for the sliding of the support member. In some embodiments, the second slider 60 may further include a third positioning member and a fourth positioning member, as the second slider 60 may need to slide in cooperation with the first slider 40 to complete the tension and/or compression test of the spring to be tested. In some embodiments, the second slider 60 may be configured with a second control, or the controller 47 of the first slider 40 may simultaneously control the sliding range and/or the number of slides of the second slider 60. The specific functions of these devices can be referred to the above description, and will not be described herein.

In some embodiments, still referring to fig. 5, the base 10 may include a fixed portion 11 and a sliding portion 12, the sliding portion 12 is slidably connected to the fixed portion 11, the conduit 20 is disposed on the fixed portion 11, the first sliding member 40 is disposed on the sliding portion 12, and the second sliding member 60 is drivingly connected to the sliding portion and drives the first sliding member 40 to slide through the sliding portion 12. In such an embodiment, the sliding portion 12 may serve as a support for the second slider 60 described above.

The base 10 may include one fixing portion 11 and one sliding portion 12, or, as shown in fig. 5, the base 10 may include two fixing portions 11 and one sliding portion 12, the two fixing portions 11 being disposed at both sides of the sliding portion 12, respectively. The sliding portion 12 may be at least partially housed in the fixing portion 11 or located on one side of the fixing portion 11 and overlapped with the fixing portion 11 when sliding with respect to the fixing portion 11.

Since the base 10 is provided with the fixed portion 11 and the sliding portion 12, so that the overall length of the spring testing device is in an adjustable state, when the length variation range of the spring to be tested is small, the relative position between the first sliding member 40 and the conduit 20 can be adjusted by the second sliding member 60, so that there is more overlapping portion between the sliding portion 12 and the fixed portion 11 or most of the sliding portion 12 is accommodated in the fixed portion 11, thereby reducing the space occupied by the spring testing device, in some embodiments, as described above, the guide rod 41 is arranged at the edge position of the adapter plate 44, so that the conduit 20 can be arranged at the side of the guide rail 43, at this time, by adjusting the relative position between the first sliding member 40 and the conduit 20, the conduit 20 and the guide rail 43 can be further made to assume the state shown in fig. 4, that the projection point of one end of the conduit on the straight line of the guide rail 43 can be located within the stroke range of the guide rail 43, so that the length of the spring test device is further shortened.

When the length of the spring to be tested has a wide variation range, as described above, the second slider 60 can be slid in cooperation with the first slider 40 to increase the slidable range of the first slider 40 to meet the testing requirement.

There is also provided, in accordance with an embodiment of the present invention, a spring testing method, including:

step S102: determining the length variation range of the spring to be tested in the stretching and/or compressing test;

step S104: selecting the length of a guide pipe according to the length change range, wherein the guide pipe is used for accommodating the spring to be tested;

step S106: placing the spring to be tested in a lumen of the catheter and fixing the spring to the catheter;

step S108: connecting the spring to be tested with a first sliding part, wherein the first sliding part is used for stretching and/or compressing the spring to be tested through sliding;

step S110: determining the sliding range of the first sliding piece according to the length change range;

step S112: and controlling the first sliding piece to slide for a preset number of times according to the sliding range so as to finish the tension and/or compression test of the spring to be tested.

In step S102, the length variation range of the spring to be tested in the tensile and/or compressive test needs to be determined by the skilled person according to the specific test requirements, so that in step S104, the length of the catheter needs to be selected according to the length variation range. In such embodiments, a plurality of alternative catheters may be provided, or as described hereinbefore, variable length catheters may be provided, with appropriate length catheters being selected or adjusted to suit the length according to the range of length variation, the particular arrangement being as described hereinbefore.

In step S106 and step S108, the spring to be tested is assembled with the spring testing device, and the specific connection manner can refer to the related description in the foregoing.

In steps S110 and S112, the sliding range of the first slider is determined according to the length variation range, and then the first slider is controlled to perform a predetermined number of sliding movements according to the sliding range to complete the compression and/or tension test. The specific control method of the sliding range and the sliding times of the first sliding member can refer to the related description in the foregoing.

In some embodiments, after determining the sliding range of the first sliding member, the first sliding member needs to be set, for example, the positions of the first positioning member and the second positioning member are adjusted and/or the parameters of the controller are set as described above, and after the setting is completed, a sliding test can be performed on the first sliding member to ensure that the sliding range of the first sliding member is consistent with the length variation range and that the first sliding member can be automatically stopped or returned after sliding to a predetermined position (for example, after contacting the first positioning member and the second positioning member).

In some embodiments, when the length of the guide pipe is selected according to the length variation range, the length of the selected guide pipe is not less than the maximum value in the length variation range, so that the spring to be tested can be ensured to be always positioned in the guide pipe in the tension and/or compression test, and better guiding and protecting effects are provided for the spring to be tested.

In some embodiments, the method further comprises selecting an inner diameter of the catheter based on the diameter of the spring to be tested, such that the catheter provides better guidance and protection for the spring to be tested.

In some embodiments, the method further comprises adjusting the relative positions of the first slide and the catheter according to the length variation range, thereby enabling the first slide to slide within a more reasonable working range in the slidable range. The specific setting method can refer to the related description in the foregoing.

In some embodiments, the above method further comprises: the sliding distance of the second sliding part is determined according to the length change range, the second sliding part is used for driving the first sliding part to slide through sliding, the first sliding part and the second sliding part are enabled to slide in a matched mode, the slidable range of the first sliding part is increased, and therefore the test requirement of springs to be tested with more specifications can be met. The first sliding member and the second sliding member can be cooperatively slid in a specific manner as described above.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A spring testing apparatus comprising:

a base (10);

a conduit (20), said conduit (20) being arranged on said base (10) for receiving and fixing a spring to be tested; and

a first slider (40), the first slider (40) being arranged on the base (10) and the first slider (40) being at least partially capable of entering the conduit (20) and being connected to the spring to be tested, such that the first slider (40) upon sliding stretches and/or compresses the spring to be tested for tensile and/or compressive testing of the spring to be tested.

2. The spring testing apparatus of claim 1, further comprising:

a fixture (30), the fixture (30) securing the spring to be tested to the catheter (20).

3. The spring testing device according to claim 1, wherein the conduit (20) is arranged such that the spring to be tested is always within the lumen of the conduit (20) during tensile and/or compressive testing.

4. A spring testing device according to any of claims 1-3, wherein the conduit (20) is a clearance fit with the spring to be tested.

5. The spring testing apparatus of any of claims 1-4, further comprising:

a first seat (51) and a second seat (52), said first seat (51) and said second seat (52) being arranged on said base (10) and connected to said conduit (20).

6. The spring testing device according to claim 5, wherein at least one of the first and second seats (51, 52) is slidingly connected to the base (10).

7. The spring testing device according to claim 1, wherein the first slider (40) comprises:

the guide rod (41) and the driving part (42), the driving part (42) is in transmission connection with the guide rod (41), the guide rod (41) can enter the guide pipe (20) and is connected with the spring to be tested, so that the guide rod slides under the driving of the driving part (42) and stretches and/or compresses the spring to be tested.

8. The spring testing device according to claim 7, wherein the first slider (40) further comprises:

guide rail (43) and keysets (44), guide rail (43) set up on base (10), keysets (44) with guide rail (43) sliding connection, driving piece (42) through keysets (44) with guide arm (41) transmission is connected.

9. The spring testing apparatus according to claim 8, wherein the first slider (40) further comprises:

the positioning device comprises a first positioning piece (45) and a second positioning piece (46), wherein the first positioning piece (45) and the second positioning piece (46) are arranged on the base (10) and are respectively positioned on two sides of the adapter plate (44) so as to limit the sliding range of the adapter plate (44) between the first positioning piece (45) and the second positioning piece (46).

10. The spring testing device according to claim 9, wherein the driving member (42) drives the adapter plate (44) to slide back and forth between the first positioning member (45) and the second positioning member (46).

11. The spring testing device according to claim 9 or 10, wherein the first positioning member (45) and the second positioning member (46) are slidably connected with the base (10) to change a sliding range limit of the adapter plate (44).

12. The spring testing device according to any one of claims 7-11, wherein the first slider (40) further comprises:

a controller (47), the controller (47) being configured to control a sliding distance of the guide rod (41) and/or to record a number of sliding times of the guide rod (41).

13. The spring testing apparatus of any of claims 1-12, further comprising:

a second sliding part (60), wherein the second sliding part (60) drives the first sliding part (40) to slide so as to change the relative position of the first sliding part (40) and the conduit (20).

14. The spring testing device according to claim 13, wherein the base (10) comprises a fixed portion (11) and a sliding portion (12), the sliding portion (12) is slidably connected with the fixed portion (11), the conduit (20) is disposed on the fixed portion (11), the first sliding member (40) is disposed on the sliding portion (12), and the second sliding member (60) is in transmission connection with the sliding portion (12) and drives the first sliding member (40) to slide through the sliding portion (12).

15. A spring testing method, comprising:

determining the length variation range of the spring to be tested in the stretching and/or compressing test;

selecting the length of a guide pipe according to the length change range, wherein the guide pipe is used for accommodating the spring to be tested;

placing the spring to be tested in a lumen of the catheter and fixing the spring to the catheter;

connecting the spring to be tested with a first sliding part, wherein the first sliding part is used for stretching and/or compressing the spring to be tested through sliding;

determining the sliding range of the first sliding piece according to the length change range;

and controlling the first sliding piece to slide for a preset number of times according to the sliding range so as to finish the tension and/or compression test of the spring to be tested.

16. The method of claim 15, wherein the length of the selected catheter is not less than a maximum value in the range of length variations when the length of the catheter is selected according to the range of length variations.

17. The method of claim 15 or 16, further comprising:

the inner diameter of the conduit is selected according to the diameter of the spring to be tested.

18. The method of claim 15, further comprising:

adjusting the relative position of the first slide and the catheter according to the length variation range.

19. The method of claim 15, further comprising:

determining the sliding distance of a second sliding part according to the length change range, wherein the second sliding part is used for driving the first sliding part to slide through sliding;

and enabling the first sliding piece and the second sliding piece to slide in a matching mode.