Kama alloy resistor element temperature excursion test fixture and resistor element test method

Abstract

The invention discloses a Kama alloy resistor element temperature excursion test fixture and a resistor element test method. The Kama alloy resistor element temperature excursion test fixture comprises a support assembly, a cantilever beam and a plug-in type retention sleeve. The cantilever beam is suspended on the bracket assembly; the cantilever beam is sleeved with the pluggable retaining sleeve in a pluggable mode, a spiral channel is formed in the outer side wall of the pluggable retaining sleeve, and the spiral channel spirally extends from one end of the pluggable retaining sleeve to the other end of the pluggable retaining sleeve. The plug-in type retaining sleeve is rotatably connected to the cantilever beam in a sleeving mode, and the plug-in type retaining sleeve rotates forwards or reversely around the cantilever beam so that the plug-in type retaining sleeve can be in an expanded or reset state. The tightened Kama alloy can realize the stability during testing, the Kama alloy can be quickly mounted and dismounted to ensure the metal performance and improve the testing efficiency, and the testing problem of the Kama alloys with different lengths and sizes is solved in a jumper mode.

Description

Technical Field

[0001] The present invention relates to the field of Kama alloy resistor element testing, and in particular to a Kama alloy resistor element temperature drift testing fixture and a resistor element testing method. Background Art

[0002] With the development of science and technology, the demand for high resistance and light weight resistor components has greatly increased. Karma alloy has the advantages of high resistivity, low temperature coefficient, good corrosion resistance, etc., and stands out in this application. In order to reduce weight, the diameter of Karma alloy material is less than 0.5mm. This is because when the diameter is reduced, the weight required for the same resistance wire will be greatly reduced, so that a small and light resistor can be produced.

[0003] When testing the temperature coefficient of Kama alloy, it is necessary to wind it on a fixture and then place it in an oil tank for testing. When manually winding the Kama alloy on the fixture, it is easy to have loose winding, which will cause fluctuations during testing in the oil tank, resulting in unstable test resistance.

[0004] After the test is completed, the Kama alloy needs to be removed from the fixture and retained for re-inspection. On the one hand, repeated installation or removal of the Kama alloy will easily cause the Kama alloy to break, thus affecting its original metal properties; on the other hand, repeated installation or removal of the Kama alloy will also reduce the efficiency of the test.

[0005] In addition, when testing different Kama alloys, their lengths vary. How to set up a compatible fixture to adapt to the winding of Kama alloys of different lengths is also one of the issues that need to be considered. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a temperature drift test fixture for a Kama alloy resistor element and a resistor element test method.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A temperature drift test fixture for a Kama alloy resistor element, comprising: a bracket assembly, a cantilever beam, and a plug-in retention sleeve;

[0009] The cantilever beam is suspended and installed on the bracket assembly;

[0010] The plug-in type retention sleeve is pluggably sleeved on the cantilever beam, and the outer side wall of the plug-in type retention sleeve is provided with a spiral channel, and the spiral channel spirally extends from one end of the plug-in type retention sleeve to the other end;

[0011] The plug-in retention sleeve is rotatably sleeved on the cantilever beam, and the plug-in retention sleeve rotates forward or reversely around the cantilever beam to make the plug-in retention sleeve in an expanded or reset state.

[0012] In one embodiment,

[0013] The spiral channel has a plurality of positioning spiral grooves which are spirally connected in sequence;

[0014] A notch channel is provided on the side of the pluggable retention sleeve, the notch channel extends along the axial direction of the pluggable retention sleeve and passes through a plurality of the positioning spiral grooves, the cross section of the pluggable retention sleeve is in a "C" shape, and the pluggable retention sleeve forms an elastic arm;

[0015] The inner side wall of the plug-in retention sleeve is provided with an arc-shaped groove, and the arc-shaped groove extends along the axial direction of the plug-in retention sleeve; the outer side wall of the cantilever beam is provided with an arc-shaped flange that cooperates with the arc-shaped groove, and the arc-shaped flange extends along the axial direction of the cantilever beam;

[0016] The plug-in retention sleeve rotates forward or reversely around the cantilever beam, so that the arc-shaped groove and the arc-shaped flange slide relative to each other, thereby putting the plug-in retention sleeve in an expanded or reset state.

[0017] In one of the embodiments, the central axis of the cantilever beam coincides with the central axis of the pluggable retention sleeve, and the outer side wall of the cantilever beam and the inner side wall of the pluggable retention sleeve abut against each other.

[0018] In one of the embodiments, a terminal stud is provided on the plug-in retention sleeve.

[0019] In one embodiment, the number of the terminal studs is two, one is an incoming line stud, and the other is an outgoing line stud, and the incoming line stud and the outgoing line stud are respectively located at two ends of the plug-in retention sleeve.

[0020] In one embodiment, the support assembly includes: a fixing plate and a supporting screw; the fixing plate and the cantilever beam are connected via the supporting screw.

[0021] In one of the embodiments, an adjusting screw hole cooperating with the supporting screw rod is provided on the cantilever beam, and the cantilever beam is adjustably mounted on the supporting screw rod.

[0022] A resistance element testing method is based on the above-mentioned Kama alloy resistance element temperature drift test fixture for testing, comprising the following steps:

[0023] The plug-in retention sleeve is sleeved on the cantilever beam, the outer wall of the cantilever beam and the inner wall of the plug-in retention sleeve are mutually supported, and the plug-in retention sleeve is in a reset state;

[0024] A Kama alloy resistor element is provided, the Kama alloy resistor element is wound in the spiral channel, and the Kama alloy resistor element jumps from one of the positioning spiral grooves to another of the positioning spiral grooves through the notch channel;

[0025] The plug-in retention sleeve is rotated forwardly, and the arc-shaped groove and the arc-shaped flange slide relative to each other, so that the plug-in retention sleeve is in an expanded state;

[0026] Installing the cantilever beam on the bracket assembly to obtain a module to be tested;

[0027] Place the module in an oil tank for temperature drift test;

[0028] After the temperature drift test is completed, remove the module from the oil tank;

[0029] The module is disassembled, the plug-in retention sleeve is rotated in the reverse direction, and the plug-in retention sleeve is pulled out from the cantilever beam, and the Kama alloy resistance element is retained on the plug-in retention sleeve.

[0030] The present invention provides a temperature drift test fixture for a Kama alloy resistor element and a resistor element test method. The stretched Kama alloy can achieve stability during testing. The Kama alloy can be quickly installed and disassembled to ensure its metal properties and improve test efficiency. The test problem of Kama alloys of different lengths is solved by means of jumpers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 An exploded view of a temperature drift test fixture for a Kama alloy resistor element according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 The structural diagram of the cantilever beam and the plug-in retention sleeve shown;

[0034] Figure 3 for Figure 1 A schematic diagram of the cooperation between the cantilever beam and the plug-in retention sleeve shown;

[0035] Figure 4 Schematic diagram of winding the Kama alloy resistance element in a spiral channel. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] like Figure 1 As shown, the present invention discloses a temperature drift test fixture 10 for a Kama alloy resistor element, comprising: a bracket assembly 100 , a cantilever beam 200 , and a plug-in retention sleeve 300 .

[0040] like Figure 1 As shown, the cantilever beam 200 is suspended and mounted on the bracket assembly 100 .

[0041] like Figure 1 and Figure 2 As shown, the pluggable retention sleeve 300 is pluggably sleeved on the cantilever beam 200, and the outer wall of the pluggable retention sleeve 300 is provided with a spiral channel 310, which spirally extends from one end of the pluggable retention sleeve 300 to the other end.

[0042] like Figure 2 and Figure 3As shown, the plug-in retention sleeve 300 is rotatably sleeved on the cantilever beam 200, and the plug-in retention sleeve 300 rotates forward or reversely around the cantilever beam 200, so that the plug-in retention sleeve 300 is in an expanded or reset state. In this embodiment, the central axis of the cantilever beam 200 coincides with the central axis of the plug-in retention sleeve 300, and the outer side wall of the cantilever beam 200 and the inner side wall of the plug-in retention sleeve 300 abut against each other.

[0043] like Figure 1 As shown, further, the bracket assembly 100 includes: a fixing plate 110 and a support screw 120. The fixing plate 110 is connected to the cantilever beam 200 through the support screw 120. The cantilever beam 200 is provided with an adjustment screw hole 201 that cooperates with the support screw 120, and the cantilever beam 200 is adjustably mounted on the support screw 120.

[0044] The specific structures of the cantilever beam 200 and the plug-in retention sleeve 300 are described in detail below:

[0045] like Figure 2 As shown, the spiral channel 310 has a plurality of positioning spiral grooves 311 which are spirally connected in sequence;

[0046] like Figure 2 and Figure 3 As shown, a notch channel 320 is provided on the side of the pluggable retention sleeve 300, and the notch channel 320 extends along the axial direction of the pluggable retention sleeve 300 and passes through a plurality of positioning spiral grooves 311, and the cross section of the pluggable retention sleeve 300 is "C"-shaped, and the pluggable retention sleeve 300 forms an elastic arm 330;

[0047] like Figure 2 and Figure 3 As shown, the inner wall of the plug-in retention sleeve 300 is provided with an arc-shaped groove 340, and the arc-shaped groove 340 extends along the axial direction of the plug-in retention sleeve 300; the outer wall of the cantilever beam 200 is provided with an arc-shaped flange 210 that cooperates with the arc-shaped groove 340, and the arc-shaped flange 210 extends along the axial direction of the cantilever beam 200;

[0048] The pluggable retention sleeve 300 rotates forward or reversely around the cantilever beam 200 so that the arc-shaped groove 340 and the arc-shaped flange 210 slide relative to each other, thereby placing the pluggable retention sleeve 300 in an expanded or reset state.

[0049] like Figure 1As shown, further, a terminal stud is provided on the plug-in retention sleeve 300. Specifically, there are two terminal studs, one is an incoming line stud 301, and the other is an outgoing line stud 302. The incoming line stud 301 and the outgoing line stud 302 are respectively located at the two ends of the plug-in retention sleeve 300, and one end of the Kama alloy resistance element 20 is welded to the incoming line stud 301, and the other end is welded to the outgoing line stud 302.

[0050] Next, the working principle and testing method of the above-mentioned Kama alloy resistor element temperature drift test fixture 10 are described:

[0051] The plug-in retention sleeve 300 is sleeved on the cantilever beam 200, the outer wall of the cantilever beam 200 and the inner wall of the plug-in retention sleeve 300 are mutually supported, and the plug-in retention sleeve 300 is in a reset state;

[0052] like Figure 1 and Figure 4 As shown, a Kama alloy resistor element 20 is provided, the Kama alloy resistor element 20 is wound in a spiral channel 310, and the Kama alloy resistor element 20 jumps from one of the positioning spiral grooves 311 to another positioning spiral groove 311 through a notch channel 320; according to the test requirements, the tester will select Kama alloy resistor elements 20 of different lengths, and the number of turns of the Kama alloy resistor elements 20 of different lengths and sizes wound in the spiral channel 310 will be different, while the terminal studs at both ends of the plug-in retention sleeve 300 are fixed. In order to enable the Kama alloy resistor element 20 to be fixed on the terminal studs at both ends, the present invention cleverly A notch channel 320 is provided on the retention sleeve 300. During the winding process of the Kama alloy resistor element 20, the Kama alloy resistor element 20 is adjusted in time so that it jumps from one of the positioning spiral grooves 311 to another positioning spiral groove 311 through the notch channel 320, thereby shortening the stroke of the Kama alloy resistor element 20 so that it can be fixedly connected with the terminal studs at both ends. It can also be understood that the Kama alloy is mainly wound along the positioning spiral groove 311. When it is wound to the notch channel 320, the Kama alloy can choose to cross the notch channel 320 and continue to be wound along the predetermined path; it can also turn into the notch channel 320 (such as Figure 1 As shown), and after selectively skipping several links, a new positioning spiral groove 311 is selected for winding. In this way, when the length of the Kama alloy becomes shorter, the number of windings of the Kama alloy can be adjusted by the jumper winding method to adapt to the length of the tested Kama alloy;

[0053] The plug-in retention sleeve 300 is rotated forward, and the arc groove 340 and the arc flange 210 slide relative to each other, so that the plug-in retention sleeve 300 is in an expanded state; after the Kama alloy resistance element 20 is wound around the spiral channel 310 of the plug-in retention sleeve 300 and fixed, the entire Kama alloy resistance element 20 is still in a relaxed state, and the Kama alloy resistance element 20 needs to be tightened (the arc groove 340 and the arc flange 210 slide relative to each other, so that the plug-in retention sleeve 300 is in an expanded state, and the Kama alloy resistance element 20 is naturally in a tightened state), so that when testing in the oil tank, the Kama alloy resistance element 20 will not fluctuate, thereby improving the stability of the test resistance value;

[0054] The cantilever beam 20 is mounted on the support assembly 100 to obtain a module to be tested;

[0055] Place the module in an oil tank for temperature drift test; Place the assembled module in test oil tanks at different temperatures and connect it to an external test instrument for testing;

[0056] After the temperature drift test is completed, remove the module from the oil tank;

[0057] The module is disassembled, and the plug-in retention sleeve 300 is rotated in the reverse direction to remove the plug-in retention sleeve 300 from the cantilever beam 200, and the Kama alloy resistor element 20 is retained on the plug-in retention sleeve 300; in the actual operation process, the Kama alloy resistor element 20 after the temperature drift test needs to be retained for retesting; and the traditional method is to disassemble the Kama alloy resistor element 20 from the fixture again. During the disassembly process, the Kama alloy is not only easy to break and affect the retest data, but also The test efficiency is reduced; the present invention adopts the structural design of the plug-in retention sleeve 300, and the Kama alloy resistance element 20 is combined with the plug-in retention sleeve 300. When the test is completed, the plug-in retention sleeve 300 is directly pulled out from the cantilever beam 200. When re-testing is required, it is only necessary to reinsert the plug-in retention sleeve 300 into the cantilever beam 200 and tighten it. The whole process is convenient and fast and will not affect the metal properties of the Kama alloy. The data accuracy of the before and after tests is very high.

[0058] The present invention also discloses a resistance element testing method, which is based on the above-mentioned Kama alloy resistance element temperature drift test fixture for testing, and includes the following steps:

[0059] The plug-in type retention sleeve is sleeved on the cantilever beam, the outer wall of the cantilever beam and the inner wall of the plug-in type retention sleeve are mutually supported, and the plug-in type retention sleeve is in a reset state;

[0060] A Kama alloy resistor element is provided, the Kama alloy resistor element is wound in a spiral channel, and the Kama alloy resistor element jumps from one positioning spiral groove to another positioning spiral groove through a notch channel;

[0061] The plug-in retaining sleeve is rotated forwardly, and the arc-shaped groove and the arc-shaped flange slide relative to each other, so that the plug-in retaining sleeve is in an expanded state;

[0062] Installing the cantilever beam on the bracket assembly to obtain a module to be tested;

[0063] Place the module in an oil tank for temperature drift test;

[0064] After the temperature drift test is completed, remove the module from the oil tank;

[0065] Disassemble the module, rotate the plug-in retention sleeve in the opposite direction, pull the plug-in retention sleeve out of the cantilever beam, and the Kama alloy resistance element is retained on the plug-in retention sleeve.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A temperature drift test fixture for Kama alloy resistor elements, characterized in that: include: Bracket assembly, cantilever beam, plug-in retention sleeve; The cantilever beam is suspended and installed on the bracket assembly; The plug-in type retention sleeve is pluggably sleeved on the cantilever beam, and the outer side wall of the plug-in type retention sleeve is provided with a spiral channel, and the spiral channel spirally extends from one end of the plug-in type retention sleeve to the other end; The plug-in retention sleeve is rotatably sleeved on the cantilever beam, and the plug-in retention sleeve rotates forward or reversely around the cantilever beam to make the plug-in retention sleeve in an expanded or reset state.

2. The temperature drift test fixture for Kama alloy resistor element according to claim 1, characterized in that: The spiral channel has a plurality of positioning spiral grooves which are spirally connected in sequence; A notch channel is provided on the side of the plug-in retention sleeve, the notch channel extends along the axial direction of the plug-in retention sleeve and passes through a plurality of the positioning spiral grooves, the cross section of the plug-in retention sleeve is "C" shaped, and the plug-in retention sleeve forms an elastic arm; The inner side wall of the plug-in retention sleeve is provided with an arc-shaped groove, and the arc-shaped groove extends along the axial direction of the plug-in retention sleeve; the outer side wall of the cantilever beam is provided with an arc-shaped flange that cooperates with the arc-shaped groove, and the arc-shaped flange extends along the axial direction of the cantilever beam; The plug-in retention sleeve rotates forward or reversely around the cantilever beam, so that the arc-shaped groove and the arc-shaped flange slide relative to each other, thereby putting the plug-in retention sleeve in an expanded or reset state.

3. The temperature drift test fixture for Kama alloy resistor element according to claim 1 or 2, characterized in that: The central axis of the cantilever beam coincides with the central axis of the pluggable retention sleeve, and the outer side wall of the cantilever beam and the inner side wall of the pluggable retention sleeve abut against each other.

4. The temperature drift test fixture for Kama alloy resistor element according to claim 1 or 2, characterized in that: The plug-in retention sleeve is provided with a wiring stud.

5. The temperature drift test fixture for Kama alloy resistor element according to claim 4, characterized in that: The number of the wiring studs is two, one is an incoming line stud and the other is an outgoing line stud. The incoming line stud and the outgoing line stud are respectively located at two ends of the plug-in retention sleeve.

6. The temperature drift test fixture for Kama alloy resistor element according to claim 1, characterized in that: The support assembly comprises: a fixing plate and a supporting screw; the fixing plate and the cantilever beam are connected via the supporting screw.

7. The temperature drift test fixture for Kama alloy resistor element according to claim 6, characterized in that: The cantilever beam is provided with an adjusting screw hole matched with the supporting screw rod, and the cantilever beam is adjustably mounted on the supporting screw rod.

8. A method for testing a resistor element, characterized in that: The test is performed based on the temperature drift test fixture of the Kama alloy resistor element according to any one of claims 2 to 7, comprising the following steps: The plug-in retention sleeve is sleeved on the cantilever beam, the outer wall of the cantilever beam and the inner wall of the plug-in retention sleeve are mutually supported, and the plug-in retention sleeve is in a reset state; A Kama alloy resistor element is provided, the Kama alloy resistor element is wound in the spiral channel, and the Kama alloy resistor element jumps from one of the positioning spiral grooves to another of the positioning spiral grooves through the notch channel; The plug-in retention sleeve is rotated forwardly, and the arc-shaped groove and the arc-shaped flange slide relative to each other, so that the plug-in retention sleeve is in an expanded state; Installing the cantilever beam on the bracket assembly to obtain a module to be tested; Place the module in an oil tank for temperature drift test; After the temperature drift test is completed, remove the module from the oil tank; The module is disassembled, the plug-in retention sleeve is rotated in the reverse direction, and the plug-in retention sleeve is pulled out from the cantilever beam, and the Kama alloy resistance element is retained on the plug-in retention sleeve.

Images