Fatigue endurance test tool clamp for capillary tube with joint
By designing a conformal clamping plate and buffer pad structure, the problems of deformation and damage to capillaries during the clamping process were solved, ensuring the accuracy and integrity of the test data.
Patent Information
- Application Number
- CN202423073831.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing clamping fixtures cannot effectively adapt to the cylindrical shape of capillaries, resulting in plastic deformation and stress concentration during clamping, which affects the accuracy of test results.
A tooling fixture including a first clamping plate and a second clamping plate was designed. The clamping plate is provided with a semi-circular arc clamping groove, and a rubber buffer pad and spring structure are used. Stable clamping is achieved by fixing screws and locking nuts. The shape of the clamping jaw matches the capillary tube to avoid deformation and damage.
It achieves stable clamping and compression without damaging the capillary, preventing it from slipping out, and provides complete fatigue durability data support.
Smart Images
Figure CN223525974U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical parts testing technical field, especially relate to a kind of fatigue endurance test tool fixture for capillary tube with joint. BACKGROUND
[0002] In the research and development design process of industrial refrigeration equipment, the vibration damage and fatigue life of thin-walled metal pipeline structure caused by the running condition of compressor and road transportation process need to be analyzed and predicted, and the fatigue life prediction of capillary structure is carried out by fatigue endurance accelerated test.
[0003] The current commonly used fixing clamp usually adopts the form of flat clamping opening or rhombic clamping opening, which cannot well adapt to the round tube shape of capillary tube. On this basis, pre-tightening pressure needs to be increased to realize clamping of the pipe fitting, which will cause obvious plastic deformation and damage to the capillary tube, concentrate stress at the damage site, greatly reduce the service life and affect the test results. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of fatigue endurance test tool fixture for capillary tube with joint, which can realize the fixing effect of capillary tube with joint on vibration test table surface without damage and deformation.
[0005] A kind of fatigue endurance test tool fixture for capillary tube with joint, including first clamping plate and second clamping plate;
[0006] A plurality of semicircular clamping grooves are arranged on the first clamping plate and the second clamping plate respectively, and the clamping grooves on the first clamping plate and the second clamping plate are oppositely arranged to form a circular clamping hole for clamping capillary tube with joint;
[0007] The first clamping plate and the second clamping plate are fixedly connected by a plurality of fixed screws and lock nuts in the width direction;
[0008] The bottom of the first clamping plate and the second clamping plate is fixedly connected with a plurality of screws by a pressing plate.
[0009] In the preferred embodiment, a semicircular buffer pad is arranged in each clamping groove.
[0010] In the preferred embodiment, the buffer pad is made of rubber material.
[0011] In the preferred embodiment, the end of the buffer pad away from the pressing plate is slightly tapered to form a tightening opening.
[0012] In the preferred embodiment, a spring is sleeved on the screw, and the screw is screwed with the pressing plate and compresses the spring.
[0013] In a preferred embodiment, the plurality of clamping grooves are equidistantly spaced.
[0014] In a preferred embodiment, the plurality of fixing screws are equidistantly spaced, and the distance between the fixing screw other than the end and the two clamping grooves adjacent thereto is equal.
[0015] In a preferred embodiment, the plurality of screws are divided into groups, each group of screws is arranged around the corresponding circular clamping hole, and the distance from each screw to the midpoint of the circular clamping hole is equal.
[0016] In a preferred embodiment, the number of screws in each group is four.
[0017] In a preferred embodiment, the plurality of locking nuts are located on the same side of the tooling fixture.
[0018] The utility model has the following beneficial effects:
[0019] The tooling fixture clamp opening shape of the application adopts a circular shape, and the shape and size are matched with the size and shape of the capillary tube with an interface, so that the capillary tube can be fixed and clamped without damage and deformation.
[0020] The clamp bottom is provided with a pressing plate, which can press the capillary tube and prevent it from sliding out of the clamping hole due to vibration during the test.
[0021] The application scheme can solve the problem of distorted test data caused by the deformation of the thin-walled capillary tube under the tooling fixture, and can provide fatigue endurance data of the capillary tube structure under complete structure, thereby providing accurate data support for subsequent data analysis and structure optimization. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0023] Figure 1 The first perspective view of the fatigue endurance test tooling fixture for the capillary tube with a joint provided by the embodiments of the utility model is shown.
[0024] Figure 2 The second perspective view of the fatigue endurance test tooling fixture for the capillary tube with a joint provided by the embodiments of the utility model is shown.
[0025] Figure 3 Figure 3 is a third perspective view of the fatigue durability test fixture for a jointed capillary tube according to an embodiment of the present application;
[0026] Figure 4 Figure 4 is a longitudinal sectional view of the fatigue durability test fixture for a jointed capillary tube according to an embodiment of the present application;
[0027] Figure 5 Figure 5 is a structural schematic view of a first clamping plate according to an embodiment of the present application;
[0028] Figure 6 Figure 6 is a structural schematic view of a compression assembly according to an embodiment of the present application;
[0029] Figure 7 Figure 7 is a structural schematic view of a compression assembly according to an embodiment of the present application; Figure 6 Figure 8 is a middle A-A sectional view of the compression assembly according to an embodiment of the present application.
[0030] Reference numerals in the drawings:
[0031] 1 - first clamping plate; 2 - second clamping plate; 3 - fixed screw;
[0032] 4 - locking nut; 5 - compression plate; 6 - screw;
[0033] 7 - buffer pad; 8 - tightening opening; 9 - spring;
[0034] 10 - jointed capillary tube. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and labeled in the drawings can be arranged and designed in various different configurations.
[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application.
[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0041] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0042] like Figures 1 to 7 As shown, this embodiment provides a fatigue durability test fixture for a capillary tube with a connector, including a first clamping plate 1 and a second clamping plate 2;
[0043] The first clamping plate 1 and the second clamping plate 2 are respectively provided with a plurality of semi-circular arc-shaped clamping grooves. The clamping grooves on the first clamping plate 1 and the second clamping plate 2 are arranged opposite to each other to form a circular clamping hole for clamping the capillary tube 10 with a connector, so that multiple sets of capillary tubes 10 with connectors can be clamped and tested at the same time.
[0044] The first clamping plate 1 and the second clamping plate 2 are fixedly connected to the locking nut 4 by a plurality of fixing screws 3 in the width direction;
[0045] The bottoms of the first clamping plate 1 and the second clamping plate 2 are fixedly connected to a plurality of screws 6 by a clamping plate 5.
[0046] In order to better protect the capillary tube 10 with a joint, a semicircular buffer pad 7 is arranged in the clamping groove, and the buffer pad 7 is made of rubber material and can play a good buffering and damping effect. The two buffer pads 7 are combined together to form a circular buffer layer covering the end of the capillary tube 10 with a joint, which can avoid damage and deformation of the capillary tube 10 with a joint during clamping and testing.
[0047] The end of the buffer pad 7 away from the pressing plate 5 is slightly tapered to form a tightening opening, which can effectively prevent the axial movement of the capillary tube 10 with a joint during testing, and avoid the capillary tube 10 with a joint from slipping out of the clamping hole.
[0048] A spring 9 is sleeved on each screw 6, and the screw 6 is screwed with the pressing plate 5 and presses the spring 9.
[0049] The pressing plate 5 with a spring 9 is arranged on the outside of the clamp bottom, which can realize the pressing of the capillary tube 10 with a joint and prevent the capillary tube 10 with a joint from slipping out of the clamping hole due to vibration during testing.
[0050] The screws 6 are divided into multiple groups, and each group of screws 6 is arranged around the corresponding circular clamping hole, and the distance from each screw 6 to the midpoint of the circular clamping hole is equal.
[0051] The multiple clamping grooves are arranged at equal intervals, and the multiple fixed screws 3 are arranged at equal intervals, and the distance between the fixed screw 3 at the non-end and the two adjacent clamping grooves is equal.
[0052] The uniform arrangement of the screws 6 and the fixed screws 3 can make the pre-tightening force in each direction of the capillary tube 10 with a joint basically equal, which can achieve better clamping effect and avoid damage and deformation of the capillary tube 10 with a joint.
[0053] In the preferred embodiment, the number of screws in each group is 4.
[0054] In addition, the multiple locking nuts 4 are located on the same side of the tool clamp, which also facilitates the installation between the tool and the test bench.
[0055] The use mode of the tool clamp is as follows:
[0056] Before clamping, the capillary tube 10 with a joint is placed in the clamping groove of the second clamping plate 2 on one side, and then the first clamping plate 1 is placed on the position, and the fixed screws 3 are inserted into the through holes of the first clamping plate 1 and the second clamping plate 2 for preliminary fixation.
[0057] After the initial installation of the tooling fixture is placed on the test bench, the fixture and the test bench are fixed by rotating the table surface installation side of the fixing screw 3 into the threaded hole of the test bench, at this time the interval between the first clamping plate 1 and the second clamping plate 2 can be adjusted and clamped by rotating the locking nut 4 on the fixed screw 3 fastening side;
[0058] After the first clamping plate 1 and the second clamping plate 2 are attached to the jointed capillary tube 10, the spring 9 and the pressing plate 5 are installed. Specifically, the spring 9 is sleeved on each screw 6, and each screw 6 is screwed into the threaded hole at the bottom of the first clamping plate 1 and the second clamping plate 2, and is indirectly fastened with the tooling body by the spring, so as to provide certain fastening function and will not damage the thin wall structure of the capillary tube.
[0059] The tooling fixture of the present application adopts a circular shape for the clamping opening, and the shape and size are matched with the size and shape of the jointed capillary tube, so that the capillary tube can be fixed and clamped without damaging or deforming the capillary tube.
[0060] The pressing plate is arranged at the bottom of the fixture, which can press the capillary tube and prevent the capillary tube from sliding out of the clamping hole due to vibration during the test.
[0061] The present application can solve the problem of distorted test data caused by the deformation of the thin-walled structure of the capillary tube under the tooling fixture, and can provide fatigue and durability data of the capillary tube structure under complete structure, thereby providing accurate data support for subsequent data analysis and structure optimization.
[0062] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A fatigue endurance test tooling fixture for a belt joint capillary, characterized by, The first clamping plate and the second clamping plate are provided with a plurality of semicircular clamping grooves respectively. The first clamping plate and the second clamping plate are oppositely arranged to form a circular clamping hole for clamping a capillary tube with a joint. The first clamping plate and the second clamping plate are fixedly connected by a plurality of fixed screws and locking nuts in the width direction. The bottom of the first clamping plate and the second clamping plate is fixedly connected to a plurality of screws by a pressing plate.
2. The fatigue endurance test fixture for a belt joint capillary according to claim 1, characterized by, The clamping grooves are respectively provided with semicircular buffer pads.
3. The fatigue endurance test fixture for a belt joint capillary according to claim 2, characterized by, The buffer pads are made of rubber.
4. The fatigue endurance test fixture for a belt joint capillary according to claim 2, characterized by, The end of the buffer pad away from the pressing plate is tapered to form a tightening opening.
5. The fatigue endurance test fixture for a belt joint capillary according to claim 1, characterized by, The screw is provided with a spring, and the screw is screwed with the pressing plate and presses the spring.
6. The fatigue endurance test fixture for a belt joint capillary according to claim 1, characterized by, The plurality of clamping grooves are arranged at equal intervals.
7. The fatigue endurance test fixture for a belt joint capillary according to claim 6, characterized by, The plurality of fixed screws are arranged at equal intervals, and the distance between the non-end fixed screw and the two adjacent clamping grooves is equal.
8. The fatigue endurance test fixture for a belt joint capillary according to claim 1, characterized by, The screws are divided into a plurality of groups, and each group of screws is arranged around the corresponding circular clamping hole, and the distance from each screw to the midpoint of the circular clamping hole is equal.
9. The fatigue endurance test fixture for a belt joint capillary according to claim 8, characterized by, The number of screws in each group is four.
10. The fatigue endurance test fixture for a belt joint capillary according to claim 1, characterized by, The plurality of locking nuts are located on the same side of the tool clamp.