CN117969918A - Coaxial shunt and production method thereof - Google Patents

Abstract

The invention discloses a production method of a coaxial shunt and the coaxial shunt, the production method comprises the steps of coating a first solder between a second conductive sheet and an insulating part of the coaxial connector, and welding the second conductive sheet, a resistor body and the insulating part by adopting a first heating temperature; coating a second solder between the conductive sleeve and the resistor body and between the conductive sleeve and the outer sleeve part, and welding the conductive sleeve and the resistor body and the outer sleeve part by adopting a second heating temperature; wherein the first solder has a melting point higher than that of the second solder, and the first heating temperature is higher than that of the second heating temperature. According to the invention, on one hand, the welding defect of the inner member caused by the welding process can be avoided, the product quality is influenced, and on the other hand, when the welding defect of the outer member exists, the advantage that the welding spot welded before is not damaged by low-temperature repeated reflow welding can be utilized, the outer structure is reworked and welded under the condition that the inner member is not influenced, and the production efficiency is improved.

Description

Coaxial shunt and production method thereof

Technical Field

The invention belongs to the technical field of resistor production and manufacturing, and particularly relates to a production method of a coaxial shunt and the coaxial shunt.

Background

The current divider is a current measuring sensor based on ohm's law, and the principle is that a resistor with a known resistance value is connected into a measured circuit, and then the current is reversely pushed by measuring the voltages at two ends of the resistor.

The coaxial current divider can effectively reduce parasitic inductance generated in detection, so that detection accuracy can be ensured in a high-frequency high-current working circuit. However, the inner and outer thin-wall parts of the current coaxial resistor are required to be connected to the same side of the port through solder paste welding, and the inner and outer thin-wall parts are arranged in front of each other and in sequence behind each other. During the installation process, it was found that: and when the inner thin-wall part is welded to the port by heating the solder paste and then welding the outer thin-wall part by using the same solder paste by using the same method, the temperature of the port is increased to the melting point of the solder paste again, and the inner thin-wall part falls off from the port.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to provide a production method of the coaxial shunt, and aims to solve the technical problem that the quality of the coaxial shunt is affected due to the defect of welding quality of an inner layer component caused by time division welding in the production of the coaxial shunt in the prior art.

In order to solve the technical problems, the invention provides a production method of a coaxial shunt, which comprises a coaxial connector, a first conductive rod, a resistor body and a conductive sleeve, wherein the first conductive rod is connected with a central needle of the coaxial connector, the conductive sleeve is sleeved outside the first conductive rod and is connected with an outer sleeve part of the coaxial connector, a containing cavity is formed between the conductive sleeve and the first conductive rod, the periphery of the first conductive rod is sleeved with the resistor body positioned in the containing cavity, the upper end of the resistor body is connected with the first conductive rod through a first conductive sheet, and the lower end of the resistor body is connected with the conductive sleeve through a second conductive sheet;

the production method comprises the following steps:

Coating a first solder between the second conductive sheet and an insulating part of the coaxial connector, and welding the second conductive sheet, the resistor body and the insulating part by adopting a first heating temperature;

Coating a second solder between the conductive sleeve and the resistor body and between the conductive sleeve and the outer sleeve part, and welding the conductive sleeve and the resistor body and the outer sleeve part by adopting a second heating temperature;

Wherein the first solder has a melting point higher than that of the second solder, and the first heating temperature is higher than that of the second heating temperature.

Optionally, the step of applying the first solder between the second conductive sheet and the insulating portion of the coaxial connector and soldering the second conductive sheet, the resistor, and the insulating portion using a first heating temperature includes, before:

and coating the first solder between the first conductive rod and the center pin, and welding the first conductive rod and the center pin by adopting the first heating temperature.

Optionally, after the step of applying the first solder between the second conductive sheet and the insulating portion of the coaxial connector and welding the second conductive sheet, the resistor, and the insulating portion with the first heating temperature, the step of applying the second solder between the conductive sleeve and the resistor, and between the conductive sleeve and the outer sleeve portion and welding the conductive sleeve and the resistor and the outer sleeve portion with the second heating temperature includes:

and coating the first solder between the first conductive sheet and the resistor and between the first conductive rod, and welding the first conductive rod, the first conductive rod and the resistor by adopting the first heating temperature.

Optionally, the coaxial shunt further includes an insulating tube sleeved between the resistor and the first conductive rod, the first solder is coated between the second conductive sheet and the insulating portion of the coaxial connector, and the step of welding the second conductive sheet, the resistor and the insulating portion with a first heating temperature includes:

The insulating tube is embedded into the resistor body, and then the insulating tube is inserted into the through hole of the second conducting plate, so that the insulating tube, the resistor body and the lower end face of the second conducting plate are flush to form a combination body;

Coating the first solder on the end face of the combination body facing the insulating part and the end face of the insulating part facing the combination body;

Sleeving the assembly body on the first conductive rod until the assembly body is contacted with the coaxial connector;

And heating at the first heating temperature to weld the second conductive sheet, the resistor body and the insulating part.

Optionally, the step of coating the first solder between the first conductive sheet and the resistor and the first conductive rod, and welding the first conductive rod, and the resistor using the first heating temperature includes:

sleeving the first conductive sheet on the first conductive rod;

Coating the first solder on the end face and the outer peripheral side of the first conductive sheet facing the combination body;

Pushing the first conductive sheet into the resistor body and contacting the insulating tube;

and heating at the first heating temperature to weld the first conductive sheet, the resistor body and the first conductive rod.

Optionally, the coaxial shunt further comprises a second conductive rod and a third conductive sheet, and the conductive sleeve is connected with the second conductive rod through the third conductive sheet;

the step of welding the conductive sleeve, the resistor body and the outer sleeve part by adopting a second heating temperature comprises the following steps:

coating the first solder between the second conductive rod and the third conductive sheet, and welding the second conductive rod and the third conductive sheet by adopting the first heating temperature;

and coating the second solder between the third conductive sheet and the conductive sleeve, and welding the third conductive sheet and the conductive sleeve by adopting the second heating temperature.

Optionally, the step of applying a second solder to the conductive sleeve and the resistor, and between the conductive sleeve and the outer sleeve, and welding the conductive sleeve and the resistor and the outer sleeve at a second heating temperature includes:

coating a second solder on the inner peripheral side of the conductive sleeve and the end surface of the conductive sleeve facing the connector;

sleeving the conductive sleeve on the peripheries of the first conductive rod and the resistor until the conductive sleeve contacts the outer sleeve part;

and heating at a second heating temperature to weld the conductive sleeve, the resistor body and the outer sleeve part.

Optionally, the composition of the first solder is as follows: sn,99%; ag,0.3%, cu0.7%; the first heating temperature is more than or equal to 240 ℃ and less than or equal to 260 ℃; and/or the number of the groups of groups,

The composition of the second solder is as follows: sn,64%; ag,1%, bi,35%; the second heating temperature is greater than or equal to 210 degrees and less than or equal to 230 degrees.

Optionally, after the step of applying a second solder to the conductive sleeve and the resistor, and between the conductive sleeve and the outer sleeve, and welding the conductive sleeve and the resistor and the outer sleeve at a second heating temperature, the method includes:

Detecting the welding quality of the coaxial shunt;

And when the welding quality does not meet the preset standard, performing reflow soldering at a second heating temperature so as to overhaul the coaxial shunt.

In order to solve the technical problems, the invention provides a coaxial shunt which is produced by adopting the production method of the coaxial shunt.

The technical scheme provided by the invention has the following advantages:

The invention provides a production method of a coaxial shunt and the coaxial shunt, which comprises the steps of coating a first solder between a second conductive sheet and an insulating part of the coaxial connector, and welding the second conductive sheet, the resistor body and the insulating part by adopting a first heating temperature; coating a second solder between the conductive sleeve and the resistor body and between the conductive sleeve and the outer sleeve part, and welding the conductive sleeve and the resistor body and the outer sleeve part by adopting a second heating temperature; wherein the first solder has a melting point higher than that of the second solder, and the first heating temperature is higher than that of the second heating temperature. In the embodiment provided by the invention, the inner layer component is welded by adopting the solder with higher melting point, and then the outer layer component is welded by adopting the solder with lower melting point, so that on one hand, the welding defect of the inner layer component caused by the welding process can be avoided, the product quality is influenced, and on the other hand, when the welding defect of the outer component exists, the advantage that the welding spot welded before is not damaged by low-temperature repeated reflow welding can be utilized, the outer structure is reworked and welded under the condition that the inner component is not influenced, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a process flow diagram of an embodiment of a method for producing a coaxial splitter according to the present invention;

Fig. 2 is a schematic perspective view of an embodiment of a coaxial splitter according to the present invention;

FIG. 3 is a front view of the coaxial splitter of FIG. 2;

FIG. 4 is a cross-sectional view of the coaxial splitter of FIG. 3;

Fig. 5 is an exploded perspective view of the coaxial splitter of fig. 2.

Reference numerals illustrate:

A 100-coaxial shunt; a 10-coaxial connector; 11-a central needle; 12-an insulating part; 13-an outer sleeve part; 21-a first conductive rod; 22-a second conductive rod; 30-insulating tube; 40-resistor body; 50-conducting sleeve; 51-a cavity; 61-a first conductive sheet; 62-a second conductive sheet; 63-third conductive sheet.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

The invention provides a production method of a coaxial shunt and a coaxial shunt, wherein the coaxial shunt is produced by the production method.

The coaxial shunt provided by the present invention has a specific structure as shown in fig. 2 to 5, and the coaxial shunt 100 includes a coaxial connector 10, a first conductive rod 21, an insulating tube 30, a resistor 40, a conductive sleeve 50, and a second conductive rod 22.

The coaxial connector 10 is a conventional coaxial cable connector for connecting transmission lines. The coaxial connector 10 includes a center pin 11, an insulating portion 12, and an outer jacket portion 13 disposed in this order along the inner and outer turns. The center pin 11 is an inner conductor of the coaxial connector 10, and is used for acquiring a voltage signal at one end of the resistor 40, and is preferably gold-plated with pure copper. The insulating portion 12 is an insulator of the coaxial connector 10, and is preferably polytetrafluoroethylene PTFE; the outer jacket portion 13 is an outer conductor of the coaxial connector 10 for acquiring a voltage signal at the other end of the resistor, and is preferably made of pure copper nickel plating. In a preferred embodiment, the coaxial connector 10 is embodied as a BNC socket to have good compatibility and versatility with coaxial transmission lines. Preferably, the port of the central needle 11 is beveled to facilitate the insertion and extraction assembly of the first conductive rod 21.

As shown in the drawing, the first conductive rod 21 extends in an up-down direction, and it should be noted that the up-down direction refers to a direction of insertion connection between the coaxial connector 10 and a corresponding transmission line, wherein a direction approaching the transmission line is downward, and a direction away from the transmission line is upward. The upper end of the first conductive rod 21 forms an input end of the split coaxial shunt 100 for accessing a working circuit to be detected, and the lower end of the first conductive rod 21 is inserted into the center pin 11 and is electrically connected with the center pin 11, so that a voltage signal at one end of the resistor 40 can be acquired by a terminal device.

The outer periphery of the first conductive rod 21 is sequentially sleeved with an insulating tube 30 and a resistor 40 from inside to outside. The insulating tube 30 is sleeved on the outer periphery of the center pin 11, and is preferably made of ceramic, so that short circuit can be prevented, and current directly flows out of the first conductive rod 21 without passing through the resistor 40. The resistor 40 is a core component of the coaxial shunt 100, and has a certain resistance value for shunting the measured current, and the material of the resistor 40 is preferably a metal material. The upper end of the resistor 40 is electrically connected to the middle of the first conductive rod 21 such that current introduced from the first conductive rod 21 flows to the resistor 40, the lower end of the resistor 40 is electrically connected to the inner circumference of the conductive sleeve 50, and the upper end of the conductive sleeve 50 is electrically connected to the second conductive rod 22 such that current flowing through the resistor 40 flows to the second conductive rod 22 through the conductive sleeve 50. Wherein the second conductive rod 22 forms the output of the split coaxial splitter 100 and is connected to an operating circuit.

With continued reference to fig. 4, the conductive sleeve 50 is sleeved on the outer periphery of the first conductive rod 21, and a cavity 51 is provided between the inner periphery of the conductive sleeve 50 and the first conductive rod 21, and the insulating tube 30 and the resistor 40 are accommodated in the cavity 51. The lower end of the conductive sleeve 50 extends downward to be conductively connected with the outer jacket portion 13 so that the terminal device can acquire a voltage signal of the other end of the resistor 40 through the outer jacket portion 13. In this way, the terminal device can acquire the voltage signal at both ends of the resistor 40, and can acquire the current value of the operating circuit according to ohm's law when the resistance value of the resistor 40 is known.

The current thus split from the operating circuit flows in the following direction: the magnetic field generated when current flows through the resistor body 40 is counteracted with the magnetic field generated when current flows through the conductive sleeve 50 under the current path, so that the detection precision is greatly improved, meanwhile, the magnetic field does not contain an iron core and a shielding layer, great loss and heating cannot be generated even under the action of high-frequency current, and the risk of damaging a current probe in the measurement process is avoided.

It should be noted that, in this embodiment, the terminal device is grounded to the working circuit to be tested, and the shunt component is used to detect the current on the low side of the working circuit, so as to avoid signal interference. Accordingly, the second conductive rod 22 should be connected to the ground or lowest potential of the operating circuit during operation.

With continued reference to fig. 4 and 5, the first conductive rod 21 is electrically connected to the resistor 40 through a first conductive sheet 61, the first conductive sheet 61 is disposed in the middle of the first conductive rod 21, the first conductive rod 21 is disposed through the first conductive sheet 61, the first conductive sheet 61 is inserted into the inner periphery of the resistor 40, and the lower side of the first conductive sheet 61 is abutted to the upper end of the insulating tube 30. In this way, the specific electrical connection position between the first conductive rod 21 and the resistor 40 can be precisely defined, the contact area between the first conductive rod 21 and the resistor 40 is increased, the conductive efficiency is improved, and meanwhile, the length of the resistor 40 can be reduced, the inductance is reduced, and the frequency response is improved.

With continued reference to fig. 4 and 5, the resistor 40 is electrically connected to the conductive sleeve 50 through a second conductive sheet 62, and the second conductive sheet 62 is sleeved on the outer periphery of the lower end of the resistor 40 and inserted into the inner periphery of the lower end of the conductive sleeve 50. In this way, by the arrangement of the second conductive sheet 62, the specific electrical connection position between the conductive sleeve 50 and the resistor 40 can be precisely defined, the contact area between the resistor 40 and the conductive sleeve 50 is increased, the conductive efficiency is improved, and meanwhile, the length of the conductive sleeve 50 can be reduced, the inductance is reduced, and the frequency response is improved.

Further, the second conductive sheet 62 is welded to the insulating portion 12. In this way, by means of welding, the connection strength between the second conductive sheet 62 and the coaxial connector 10 can be enhanced, the structural stability can be improved, and meanwhile, loosening and falling off can be prevented, and the measurement reliability can be ensured.

With continued reference to fig. 4 and 5, the conductive sleeve 50 is electrically connected to the second conductive rod 22 through a third conductive sheet 63, the third conductive sheet 63 is inserted into the inner periphery of the upper end of the conductive sleeve 50, and the first conductive rod 21 is disposed through the third conductive sheet 63 and has a gap with the third conductive sheet 63 to avoid a short circuit. Wherein the second conductive rod 22 is inserted in the third conductive sheet 63. By the arrangement of the third conductive sheet 63, the contact area between the conductive sleeve 50 and the second conductive rod 22 can be increased, the conductive efficiency can be improved, the length of the second conductive rod 22 can be reduced, the inductance can be reduced, and the frequency response can be improved.

The materials of the first conductive rod 21, the second conductive rod 22, the first conductive sheet 61, the second conductive sheet 62, the third conductive sheet 63 and the conductive sleeve 50 can be selected according to the need. Preferably, the first conductive rod 21, the second conductive rod 22, the first conductive sheet 61, and the second conductive sheet 62 are made of copper, and the third conductive sheet 63 and the conductive sleeve 50 are made of brass. In this way, the inside of the coaxial shunt 100 and the end for outputting and inputting the current use red copper with smaller resistance, better conductivity and softer material, so as to improve the conductivity and the measurement accuracy. The outer part of the coaxial shunt 100 is made of harder brass, so that the mechanical strength and corrosion resistance of the product are improved while the conductivity is ensured, and the service life and reliability of the coaxial shunt 100 are improved.

The specific structure of the coaxial splitter 100 is presented below, and referring to fig. 1, a first embodiment of a method for producing a coaxial splitter according to the present invention is provided, and the method includes the following steps:

S1, coating a first solder between the second conductive sheet 62 and the insulating part 12 of the coaxial connector 10, and welding the second conductive sheet 62, the resistor 40 and the insulating part 12 by adopting a first heating temperature;

Preferably, step S1 comprises:

Embedding the insulating tube 30 into the resistor body 40, and inserting the insulating tube 30 into the through hole of the second conductive sheet 62 so that the lower end surfaces of the insulating tube 30, the resistor body 40 and the second conductive sheet 62 are flush to form a combination;

A step of applying the first solder to an end face of the assembly facing the insulating portion 12 and an end face of the insulating portion 12 facing the assembly;

sleeving the combined body on the first conductive rod 21 until the combined body is contacted with the coaxial connector 10;

And heating at the first heating temperature to weld the second conductive sheet 62, the resistor 40, and the insulating portion 12.

In this embodiment, the insulating tube 30, the resistor 40 and the second conductive sheet 62 are assembled to form a combination, and then the combination is assembled with the first conductive rod 21 and the coaxial connector 10 in place and then welded, so that the structure of the member can be utilized to limit, the installation position between the second conductive sheet 62 and the resistor 40 as well as the insulating tube 30 accurately meets the design requirement, the accurate resistance value after the production of the coaxial shunt 100 is ensured, and the accuracy of current detection is improved.

S2, coating a second solder between the conductive sleeve 50 and the resistor 40 and between the conductive sleeve 50 and the outer sleeve 13, and welding the conductive sleeve 50 and the resistor 40 and the outer sleeve 13 at a second heating temperature;

Preferably, step S2 includes:

a step of applying a second solder to an inner peripheral side of the conductive sleeve 50 and an end face of the conductive sleeve 50 facing the connector;

Sleeving the conductive sleeve 50 on the peripheries of the first conductive rod 21 and the resistor body 40 until the conductive sleeve 50 contacts the outer sleeve part 13;

a step of heating at a second heating temperature to weld the conductive sleeve 50, the resistor 40 and the outer sleeve portion 13;

Wherein the first solder has a melting point higher than that of the second solder, and the first heating temperature is higher than that of the second heating temperature.

In this embodiment, specific materials of the first solder and the second solder are not limited, and in an alternative embodiment, the melting point of the second solder is in the range of 172 ℃ to 178 ℃, and the melting point of the first solder is in the range of 217 ℃ to 227 ℃, specifically, the first solder and the second solder are both alloy components containing tin, and specifically, the adjustment of the melting point of the solder can be achieved by adjusting the mixing ratio of tin and other metals. In an alternative embodiment, the composition of the first solder is as follows: sn,99%; ag,0.3%, cu0.7%; the first heating temperature is 240 degrees or more and 260 degrees or less. The composition of the second solder is as follows: sn,64%; ag,1%, bi,35%; the second heating temperature is greater than or equal to 210 degrees and less than or equal to 230 degrees. Therefore, when the second heating temperature is adopted for welding, the welding spots welded by the first heating temperature are not dissolved, and poor welding quality is caused.

In the embodiment provided by the invention, the inner layer component is welded by adopting the solder with higher melting point, and then the outer layer component is welded by adopting the solder with lower melting point, so that on one hand, the welding defect of the inner layer component caused by the welding process can be avoided, the product quality is influenced, and on the other hand, when the welding defect of the outer component exists, the advantage that the welding spot welded before is not damaged by low-temperature repeated reflow welding can be utilized, the outer structure is reworked and welded under the condition that the inner component is not influenced, and the production efficiency is improved.

Based on the first embodiment of the production method described above, in order to achieve the connection of the first conductive rod 21 with the coaxial connector 10, in an alternative embodiment, the step S1 is preceded by:

and coating the first solder between the first conductive rod 21 and the center pin 11, and welding the first conductive rod 21 and the center pin 11 at the first heating temperature.

In this embodiment, the pre-mounting of the first conductive rod 21 provides a limit in the plugging direction for the assembly of the subsequent other components, while the reliable connection of the first conductive rod 21 to the central pin 11 enables the terminal device to obtain the voltage signal at one end of the resistor body 40 via the coaxial connector 10.

Further, based on the above embodiment, in an alternative embodiment, after the step of S1, before the step of S2, the method includes:

The steps are as follows: the first solder is applied between the first conductive sheet 61 and the resistor 40 and the first conductive rod 21, and the resistor 40 are soldered using the first heating temperature.

In an alternative embodiment, this step may specifically comprise:

sleeving the first conductive sheet 61 on the first conductive rod 21;

A step of applying the first solder to the end surface and the outer peripheral side of the first conductive sheet 61 facing the assembly;

pushing the first conductive sheet 61 into the resistor 40 and contacting the insulating tube 30;

And heating at the first heating temperature to weld the first conductive sheet 61, the resistor 40 and the first conductive rod 21.

In this embodiment, the first conductive rod 21 and the resistor 40 are reliably connected in a conductive manner by welding the first conductive sheet 61 and the first conductive rod 21 and the resistor 40, and the length of the insulating tube 30 determines the connection position of the first conductive rod 21 and the resistor 40, so that the effective resistance of the resistor 40 to be connected to the circuit can be accurately controlled, and the detection accuracy of the coaxial shunt 100 is ensured.

Based on the first embodiment of the foregoing production method, after step S2, the method further includes:

A step of coating the first solder between the second conductive rod 22 and the third conductive sheet 63, and welding the second conductive rod 22 and the third conductive sheet 63 at the first heating temperature;

And coating the second solder between the third conductive sheet 63 and the conductive sleeve 50, and welding the third conductive sheet 63 and the conductive sleeve 50 by adopting the second heating temperature.

In this embodiment, the inner and outer circles of the third conductive sheet 63 are also welded by the first solder and the second solder with different melting points, that is, the inner member is welded by the solder with higher melting point, and the outer member is welded by the solder with lower melting point, so that on one hand, the welding defect of the inner member caused by the welding process can be avoided, the product quality is affected, and on the other hand, when the welding defect of the outer member exists, the advantage of the welding point welded before being not damaged by low-temperature multiple reflow welding can be utilized, and the outer structure is reworked and welded under the condition of not affecting the inner member, thereby improving the production efficiency.

Based on the above embodiment, the step S2 further includes:

a step of detecting welding quality of the coaxial shunt 100;

In specific implementation, the detection modes can be various, for example, the same solder paste is used for observing whether the state of the solder paste reaches the melting state under the same heating environment, heating temperature and heating time; a small current is introduced into the resistor, whether the resistor is conducted or not is tested, and the welding is effective when the resistor is conducted; applying a certain tensile force to two ends of the welding position, and testing the welding firmness; the various embodiments described above may be implemented separately or in combination.

And when the welding quality does not meet the preset standard, performing reflow soldering at a second heating temperature to overhaul the coaxial shunt 100.

In this embodiment, when the internal structure of the coaxial splitter has poor welding or the resistance of the whole resistor is poor, because the outer layer uses the second solder with a lower melting point, low-temperature reflow welding can be adopted without causing adverse effects on the welding spots of the first solder adopted in the inner part, so that the maintenance of the internal part is facilitated, and the production efficiency can be improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. Based on the embodiments of the present invention, those skilled in the art may make other different changes or modifications without making any creative effort, which shall fall within the protection scope of the present invention.

Claims (10)

1. The production method of the coaxial shunt is characterized in that the coaxial shunt comprises a coaxial connector, a first conductive rod, a resistor body and a conductive sleeve, wherein the first conductive rod is connected with a central needle of the coaxial connector, the conductive sleeve is sleeved outside the first conductive rod and is connected with an outer sleeve part of the coaxial connector, a containing cavity is formed between the conductive sleeve and the first conductive rod, the resistor body positioned in the containing cavity is sleeved on the periphery of the first conductive rod, the upper end of the resistor body is connected with the first conductive rod through a first conductive sheet, and the lower end of the resistor body is connected with the conductive sleeve through a second conductive sheet;

the production method comprises the following steps:

Coating a first solder between the second conductive sheet and an insulating part of the coaxial connector, and welding the second conductive sheet, the resistor body and the insulating part by adopting a first heating temperature;

Coating a second solder between the conductive sleeve and the resistor body and between the conductive sleeve and the outer sleeve part, and welding the conductive sleeve and the resistor body and the outer sleeve part by adopting a second heating temperature;

Wherein the first solder has a melting point higher than that of the second solder, and the first heating temperature is higher than that of the second heating temperature.

2. The method of manufacturing a coaxial shunt of claim 1, wherein the step of applying a first solder between the second conductive sheet and the insulating portion of the coaxial connector, and welding the second conductive sheet, the resistor, and the insulating portion using a first heating temperature is preceded by the step of:

and coating the first solder between the first conductive rod and the center pin, and welding the first conductive rod and the center pin by adopting the first heating temperature.

3. The method of manufacturing a coaxial shunt according to claim 2, wherein after the step of applying a first solder between the second conductive sheet and the insulating portion of the coaxial connector and welding the second conductive sheet, the resistor, and the insulating portion at a first heating temperature, the step of applying a second solder between the conductive sleeve and the resistor, and between the conductive sleeve and the outer sleeve portion and welding the conductive sleeve and the resistor and the outer sleeve portion at a second heating temperature comprises:

and coating the first solder between the first conductive sheet and the resistor and between the first conductive rod, and welding the first conductive rod, the first conductive rod and the resistor by adopting the first heating temperature.

4. The method of manufacturing a coaxial shunt of claim 3, further comprising an insulating tube sleeved between the resistor and the first conductive rod, wherein the step of applying a first solder between the second conductive sheet and the insulating portion of the coaxial connector and welding the second conductive sheet, the resistor, and the insulating portion using a first heating temperature comprises:

The insulating tube is embedded into the resistor body, and then the insulating tube is inserted into the through hole of the second conducting plate, so that the insulating tube, the resistor body and the lower end face of the second conducting plate are flush to form a combination body;

Coating the first solder on the end face of the combination body facing the insulating part and the end face of the insulating part facing the combination body;

Sleeving the assembly body on the first conductive rod until the assembly body is contacted with the coaxial connector;

And heating at the first heating temperature to weld the second conductive sheet, the resistor body and the insulating part.

5. The method of manufacturing a coaxial shunt of claim 4, wherein the step of applying the first solder between the first conductive sheet and the resistor and the first conductive rod, and welding the first conductive rod, and the resistor using the first heating temperature comprises:

sleeving the first conductive sheet on the first conductive rod;

Coating the first solder on the end face and the outer peripheral side of the first conductive sheet facing the combination body;

Pushing the first conductive sheet into the resistor body and contacting the insulating tube;

and heating at the first heating temperature to weld the first conductive sheet, the resistor body and the first conductive rod.

6. The method of producing a coaxial shunt of claim 1, further comprising a second conductive rod and a third conductive sheet, wherein the conductive sleeve is connected to the second conductive rod by the third conductive sheet;

the step of welding the conductive sleeve, the resistor body and the outer sleeve part by adopting a second heating temperature comprises the following steps:

coating the first solder between the second conductive rod and the third conductive sheet, and welding the second conductive rod and the third conductive sheet by adopting the first heating temperature;

and coating the second solder between the third conductive sheet and the conductive sleeve, and welding the third conductive sheet and the conductive sleeve by adopting the second heating temperature.

7. The method of manufacturing a coaxial shunt of claim 1, wherein the step of applying a second solder between the conductive sleeve and the resistor and between the conductive sleeve and the outer jacket portion, and welding the conductive sleeve and the resistor and the outer jacket portion using a second heating temperature comprises:

coating a second solder on the inner peripheral side of the conductive sleeve and the end surface of the conductive sleeve facing the connector;

sleeving the conductive sleeve on the peripheries of the first conductive rod and the resistor until the conductive sleeve contacts the outer sleeve part;

and heating at a second heating temperature to weld the conductive sleeve, the resistor body and the outer sleeve part.

8. The method of producing a coaxial shunt according to any one of claims 1 to 7, wherein the composition of the first solder is as follows: sn,99%; ag,0.3%, cu0.7%; the first heating temperature is more than or equal to 240 ℃ and less than or equal to 260 ℃; and/or the number of the groups of groups,

The composition of the second solder is as follows: sn,64%; ag,1%, bi,35%; the second heating temperature is greater than or equal to 210 degrees and less than or equal to 230 degrees.

9. The method of producing a coaxial shunt according to any one of claims 1 to 7, wherein said step of applying a second solder between said conductive sleeve and said resistor and between said conductive sleeve and said outer jacket portion, and welding said conductive sleeve and said resistor and said outer jacket portion using a second heating temperature, comprises:

Detecting the welding quality of the coaxial shunt;

And when the welding quality does not meet the preset standard, performing reflow soldering at a second heating temperature so as to overhaul the coaxial shunt.

10. Coaxial shunt produced by the production method of the coaxial shunt according to any one of claims 1 to 9.