Cold solder joint detection device

Abstract

The utility model relates to a pseudo soldering detection device, which comprises a power supply, an oscilloscope, a support and detection pliers, the number of the detection pliers is two, the two detection pliers are respectively arranged on the support, the front ends of the detection pliers are clamping parts, leads are arranged in the clamping parts, and the two leads in the two detection pliers are connected through the power supply and the oscilloscope. According to the utility model, the conventional manual pliers are modified, the support is used for auxiliary installation and positioning, the closed loop is realized by combining the alternating current power supply and the oscilloscope, and the pseudo soldering detection and judgment are realized through the L-shaped plate or other tools, so that the data feedback is comprehensive, the detection result is accurate, and huge cost is saved for enterprises.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a cold welding detection device. Background Art

[0002] When assembling an air conditioner, the stator coil of the air conditioner motor must be connected to the lead wire and soldered at the connection. Different types of coils are needed according to different technical requirements, and some of the coils are aluminum wire or enameled wire. When welding, the aluminum oxide layer or paint layer on the surface of the aluminum wire or enameled wire will hinder the bonding between the materials, thereby affecting the welding quality. Especially in some series of motors, there are cases where the common wire and the lead wire are both aluminum wire, which is very easy to cause cold welding and needs to be strictly controlled. However, the existing cold welding detection equipment is relatively expensive, which imposes a large cost burden on enterprises. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a cold solder joint detection device, which can not only accurately feedback and detect the cold solder joint situation, but also save a lot of costs.

[0004] The technical solution of the utility model is: a cold solder joint detection device, including a power supply, an oscilloscope, a bracket and a detection clamp, the detection clamp has two and is respectively installed on the bracket, the front end of the detection clamp is a clamping part, and a wire is arranged in the clamping part, and the two wires in the two detection clamps are connected through the power supply and the oscilloscope.

[0005] Furthermore, the bracket includes a base plate and a partition plate, the partition plate is vertically inserted in the middle of the base plate, and the detection clamp is installed on the side of the partition plate.

[0006] Furthermore, a rotating shaft is provided on the side of the partition, and a circular hole is provided in the middle of the detection clamp, and the circular hole is rotatably connected to the rotating shaft.

[0007] Furthermore, a limit block is provided on the side of the partition, and the limit block is located on one side of the rotating shaft, and the upper end of the detection clamp can abut against the limit block.

[0008] Furthermore, the front end and the upper end of the partition are provided with interconnected L-shaped grooves, and a horizontally sliding L-shaped plate is provided in the L-shaped groove.

[0009] Furthermore, the L-shaped plate is made of insulating material.

[0010] Furthermore, the detection pliers are composed of two identical pliers bodies hinged in the middle, the front end of the pliers body is a pliers head, the rear end of the pliers body is a handle, and the clamping part is between the pliers heads.

[0011] Furthermore, a support spring is provided between the handles.

[0012] Furthermore, the handle is provided with a mounting post, and the spring sleeve is arranged on the mounting post.

[0013] Furthermore, a notch is provided on the clamp body.

[0014] Furthermore, the notch may abut against the limiting block.

[0015] Furthermore, the notch can lead out the wire.

[0016] Compared with the prior art, the advantages of the utility model are: by modifying the existing manual pliers, using a bracket for auxiliary installation and positioning, combining an AC power supply and an oscilloscope to achieve a closed circuit, and then using an L-shaped plate or other tools to detect and determine cold soldering, the data feedback is comprehensive, the detection results are accurate, and it also saves huge costs for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a diagram of the combined state of the bracket and the detection clamp of the utility model;

[0019] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the detection pliers of the utility model;

[0022] Figure 5 This is a working principle diagram of the utility model.

[0023] Among them: 1. power supply; 2. oscilloscope; 3. bracket; 31. bottom plate; 32. partition; 33. rotating shaft; 34. L-shaped groove; 35. limit block; 4. detection pliers; 41. pliers head; 42. handle; 43. notch; 44. round hole; 45. mounting column; 5. welding part to be detected; 6. wire; 7. L-shaped plate; 8. spring. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] like Figure 1-5 As shown, a cold solder joint detection device includes a power supply 1, an oscilloscope 2, a bracket 3 and a detection clamp 4. The detection clamp 4 has two pieces and is respectively installed on the bracket 3, freeing the hands of the detection personnel so that the knocking and stripping work of the welding position can be performed. The front end of the detection clamp 4 is a clamping part, and a wire 6 is provided in the clamping part. The two wires 6 in the two detection clamps 4 are connected through the power supply 1 and the oscilloscope 2. The detection clamp 4 can clamp two different positions connected to the welded part, and a loop is formed with the power supply 1 and the oscilloscope 2 through the built-in wire 6 of the detection clamp 4; the bracket 3 includes a bottom plate 31 and a partition 32. The bottom plate 31 can be fixed on the workbench by screws, and the partition 32 is vertically inserted in the middle of the bottom plate 31. The detection clamp 4 is installed on the side of the partition 32. The two detection clamps 4 are separated by the partition 32 and do not affect each other.

[0026] In the above embodiment, a rotating shaft 33 is provided on the side of the partition 32, and a circular hole 44 is provided in the middle of the detection clamp 4. The circular hole 44 is rotatably connected to the rotating shaft 33, and the direction of the detection clamp 4 can be adjusted to facilitate clamping the weldment; a limit block 35 is provided on the side of the partition 32, and the limit block 35 is located on one side of the rotating shaft 33. Since the middle part of the detection clamp 4 can rotate, the detection clamp 4 is light on the head and heavy on the feet, so that the front half of the detection clamp 4 can automatically tilt upward and rest on the limit block 35; the front end and the upper end of the partition 32 are provided with a communicating L-shaped groove 34, and a horizontally sliding L-shaped plate 7 is provided in the L-shaped groove 34, and the L-shaped plate 7 can extend from the side of the L-shaped groove 34 or be hidden.

[0027] In the above embodiment, the detection clamp 4 is composed of two identical clamp bodies hinged in the middle, the front end of the clamp body is a clamp head 41, the rear end of the clamp body is a handle 42, and the clamp head 41 is between the clamp heads. The detection clamp 4 is modified from a commonly used manual pliers and is easy to use. The wire 6 is buried in its clamping part until the clamp head 41; a stretching spring 8 is provided between the handles 42, which can automatically reset the clamping part after the clamping part is opened and the spring 8 is compressed, so as to ensure that the clamping part tightly clamps the welded part to be tested; a mounting column 45 is provided on the handle 42, and the spring 8 is sleeved on the mounting column 45 to prevent the spring 8 from falling out; two notches 43 symmetrically arranged in the upper and lower parts are provided on the clamp body, and the notch 43 at the upper end can be abutted against the limit block 35, so that the detection clamp 4 is horizontally set, which is convenient for clamping and operation, and the notch 43 at the lower end can lead out the wire 6, realizing a hidden design to avoid frequent tearing of the wire 6; the bracket 3, the clamp body and the L-shaped plate 7 are all made of insulating materials to avoid interference in the detection process.

[0028] Description of the working method of this utility model:

[0029] The bracket 3 is installed on the workbench by screws, and then the detection clamp 4 is sleeved on the rotating shaft 33 through the circular hole 44 in the middle, and the rotating shaft 33 is limited by locking the nut. At this time, the front half of the detection clamp 4 with a light head and heavy feet is tilted upward, so that the notch 43 at the upper end just rests on the lower end of the limit block 35, and the notch 43 at the lower end leads out the wire 6 and is connected to the power supply 1 and the oscilloscope 2; the detection clamp 4 on both sides of the partition 32 is used to clamp the two leads of the welding part 5 to be detected respectively, and the built-in wire 6 of the detection clamp 4 is overlapped with the lead wire, and the welding part 5 to be detected, the power supply 1 and the oscilloscope 2 realize circuit closing through the wire 6 and the lead wire; this scheme adopts an AC power supply 1 with a two-wire connection method, and the voltage does not exceed 36V. After the installation of all components is completed, the power supply 1 is started and provides AC to the circuit If the quality of the weld is good, the oscilloscope 2 connected in series in the circuit will display a waveform curve of the measured signal voltage changing with time for one cycle. If its peak value and other data are close to normal data, or the deviation is less than a certain value, it can be determined that the welded part 5 to be tested has passed the initial inspection; move the L-shaped plate 7 laterally so that the L-shaped plate 7 is against the welding part of the welded part 5 to be tested, and the abutment force is continuously increased at any time. If there is a loose joint such as a cold joint at the welding position, the solder at the welding place will become loose or even fall off, thereby causing the waveform curve on the oscilloscope 2 to change; this method can be used to detect subtle cold joints. By amplifying the waveform curve and collecting and comparing it, various data can be obtained, thereby roughly estimating the actual welding area, and then judging the degree of cold joints.

[0030] This device can also be used with an insulating clamp or a stripping tool to perform extraction and stripping tests on the welded joint, so as to further determine the stability of the weld; this device is used for detecting cold welds at the connection between the stator coil and the lead of the air-conditioning motor. The coil and the lead are wound in the same direction, and when the two connected leads of the welded part 5 to be detected are wound in opposite directions, two brackets 3 can be arranged side by side, and two detection pliers 4 are respectively installed on the two brackets 3. After installation and clamping are completed, the insulating clamp or the stripping tool is used to perform longitudinal and transverse tests from the upper end, the lower end or the upper and lower ends of the welded part 5 to be detected, so as to obtain the detection data from the oscilloscope 2 and then determine the cold weld situation.

[0031] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A cold solder joint detection device, characterized in that: The invention comprises a power supply, an oscilloscope, a bracket and a detection clamp. The detection clamps are provided with two and are respectively installed on the brackets. The front end of the detection clamps is a clamping part, in which a wire is arranged. The two wires in the two detection clamps are connected through the power supply and the oscilloscope.

2. The cold solder joint detection device according to claim 1, characterized in that: The bracket comprises a bottom plate and a partition plate, wherein the partition plate is vertically inserted in the middle of the bottom plate, and the detection clamp is installed on the side of the partition plate.

3. The cold solder joint detection device according to claim 2, characterized in that: A rotating shaft is arranged on the side of the partition, and a round hole is arranged in the middle of the detection clamp, and the round hole is rotatably connected with the rotating shaft.

4. The cold solder joint detection device according to claim 2, characterized in that: The front end and the upper end of the partition are provided with interconnected L-shaped grooves, and a horizontally sliding L-shaped plate is provided in the L-shaped groove.

5. The cold solder joint detection device according to claim 3, characterized in that: A limit block is provided on the side of the partition, and the limit block is located on one side of the rotating shaft. The upper end of the detection clamp can abut against the limit block.

6. The cold solder joint detection device according to claim 4, characterized in that: The bracket, the detection clamp and the L-shaped plate are all made of insulating materials.

7. The cold solder joint detection device according to claim 1, characterized in that: The detection pliers are composed of two identical pliers bodies hinged in the middle, the front end of the pliers body is a pliers head, the rear end of the pliers body is a handle, and the clamping part is between the pliers heads.

8. The cold solder joint detection device according to claim 7, characterized in that: A spreading spring is arranged between the handles.

9. The cold solder joint detection device according to claim 7, characterized in that: The clamp body is provided with a notch, and the wire can be led out of the notch.

10. The cold solder joint detection device according to claim 8, characterized in that: The handle is provided with a mounting column, and the spring sleeve is arranged on the mounting column.

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