Temperature detection device for reflow soldering

Abstract

The utility model discloses a temperature detection device for reflow soldering. The temperature detection device comprises a mounting rack, a first driver, a brake module, a temperature measuring head, a connecting line and a remote control end. When the temperature of the reflow soldering equipment is abnormal, the temperature detection device is placed on a conveyor belt of the reflow soldering equipment, the conveyor belt drives the temperature detection device to enter the reflow soldering equipment, the temperature measurement head measures the temperature of each position in the reflow soldering equipment, and when the measured temperature value is abnormal, the temperature detection device stops relative to the conveyor belt. The conveyor belt is paused, and the temperature measuring head continues to measure for a period of time; after the temperature of the position is determined to be abnormal, the position of the temperature detection device in the reflow soldering equipment can be determined according to the scale on the connecting line and the position of the temperature detection device in the reflow soldering equipment. The method has the beneficial effects that the abnormal temperature position in the reflow soldering equipment can be determined more conveniently and quickly, and the reflow soldering equipment can be debugged and maintained conveniently.

Description

Technical Field

[0001] The utility model relates to a reflow soldering machine, in particular to a temperature detection device for a reflow soldering machine. Background Art

[0002] Reflow soldering is as follows: Before the PCB board enters the reflow soldering equipment, electronic components and solder paste are placed on the PCB board through a solder paste printer and a chip mounter. After such a PCB board enters the reflow soldering equipment, the solder paste is melted to form solder joints. The reflow soldering equipment generally includes an upper heating zone, a lower heating zone, and two conveyor belts arranged between the two heating zones. In order to enable the solder paste to stably form solder joints in the reflow soldering equipment, the temperature in the reflow soldering equipment needs to follow a reflow curve, going through preheating, constant temperature, reflow, and cooling. Problems with the solder joints on the PCB board are generally caused by abnormal temperatures in the reflow soldering equipment, and it is necessary to find the location of the temperature abnormality for debugging and repair. Since only the inlet and outlet of the PCB board are left in the whole reflow soldering equipment, it is inconvenient to determine the location of the temperature abnormality during debugging and repair. Content of the Utility Model

[0003] This application provides a temperature detection device for a reflow soldering machine, which can solve the problems raised in the background art.

[0004] In this application, a temperature detection device for a reflow soldering machine is provided, which is characterized by including:

[0005] An installation frame, with plug boards that can stretch relative to the installation frame on both opposite sides;

[0006] A first drive, arranged on the installation frame, driving the two plug boards to approach or move away from each other, so that the two plug boards have, relative to the installation frame: a preparation state with a shorter extension and a placement state with a longer extension;

[0007] A braking module, arranged on the installation frame, stopping the installation frame relative to the conveyor belt of the reflow soldering machine;

[0008] A temperature measuring head, arranged on the installation frame;

[0009] A connecting wire, connected to the installation frame, and the outer surface of the connecting wire also has a scale showing the length;

[0010] A remote control terminal, with a display screen showing the data of the temperature measuring head, controlling the first drive and the braking module.

[0011] Further, the first drive includes: a stepping motor, a connecting part, and two connecting rods; the connecting part is rotatably connected to the middle position of the installation frame, and the stepping motor drives the connecting part to rotate; the first ends of the two connecting rods are respectively hinged to opposite sides of the connecting part, and the second ends of the two connecting rods are respectively hinged to the two plug boards.

[0012] Furthermore, the first drive and the two plug plates also serve as the braking module at the same time. The first drive enables the two plug plates to have, relative to the mounting bracket, a braking state where they extend further.

[0013] Furthermore, the wiring of the stepper motor and the wiring of the temperature measuring head are both arranged on the connecting wire.

[0014] Furthermore, the rotating shaft of the connecting part is hollow to allow the wiring of the temperature measuring head to pass through.

[0015] In summary, in this application, a temperature detection device for a reflow soldering machine includes: a mounting bracket, a first drive, a braking module, a temperature measuring head, a connecting wire, and a remote control end. When the temperature of the reflow soldering equipment is abnormal, the temperature detection device is placed on the conveyor belt of the reflow soldering equipment, and the conveyor belt carries the temperature detection device into the reflow soldering equipment. The temperature measuring head measures the temperature at various positions inside the reflow soldering equipment. When the measured temperature value is abnormal, the temperature detection device stops relative to the conveyor belt, and then the conveyor belt is paused to allow the temperature measuring head to continue measuring for a period of time. After determining that the temperature at this position is abnormal, the position of the temperature detection device inside the reflow soldering equipment can be corresponded according to the scale on the connecting wire to determine the position where the temperature is abnormal inside the reflow soldering equipment. The beneficial effects are: it is more convenient and fast to determine the position where the temperature is abnormal in the reflow soldering equipment, which is convenient for debugging and repairing the reflow soldering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to better illustrate the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings required for use in the embodiments of the present application or the background art.

[0017] Figure 1 It is a schematic structural diagram of the present utility model;

[0018] Figure 2 It is a schematic diagram of the two plug plates in the preparation state;

[0019] Figure 3 It is Figure 2 A cross-sectional view taken along A-A in

[0020] Figure 4 It is Figure 3 An enlarged schematic diagram of part A in

[0021] Figure 5 It is a schematic diagram of the side plate arranged on the mounting bracket;

[0022] Figure 6 It is a schematic diagram of the two plug plates in the placement state.

[0023] In the figure,

[0024] 1. Mounting frame; 1a. Side panel; 1b. Insertion plate; 1b1. Protruding part; 1b2. Connecting part; 1c. Optical axis;

[0025] 2. First drive; 2a. Stepping motor; 2b. Connecting part; 2b1. Rotating shaft; 2c. Connecting rod;

[0026] 3. Brake module;

[0027] 4. Temperature measuring head;

[0028] 5. Connecting wire;

[0029] 6. Remote control terminal; 6a. Display screen;

[0030] 7. Conveyor belt; 7a. Limiting plate. DETAILED DESCRIPTION

[0031] The following is further explained in conjunction with the accompanying drawings. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] See also Figure 1 A temperature detection device for reflow soldering includes: a mounting frame 1, a first drive 2, a brake module 3, a temperature measuring head 4, a connecting line 5 and a remote control terminal 6.

[0033] See also Figure 2 , Figure 5 and Figure 6 , the mounting frame 1 is provided with plug plates 1b that can be extended and retracted relative to itself on both opposite sides. Specifically, the side plates 1a on both sides of the mounting frame 1 are provided with first strip-shaped through grooves, and two optical axes 1c are fixedly connected between the two side plates 1a; the plug plate 1b includes: a smaller-sized penetration portion 1b1 and a larger-sized connecting portion 2b 1b2, and the connecting portion 2b 1b2 is fixedly connected with a matching linear bearing at the position corresponding to each optical axis 1c.

[0034] The first driver 2 is arranged on the mounting frame 1 and drives the two plug boards 1b to approach or move away from each other, so that the two plug boards 1b have, relative to the mounting frame 1: a preparation state with a shorter protrusion and a placement state with a longer protrusion. That is, corresponding to the reflow soldering equipment, there are two groups of conveyor belts 7, and a limit plate 7a is also arranged on each group of conveyor belts 7. The cross-section of the limit plate 7a is in an inverted L shape. The two side edges of the PCB board are respectively placed on the two conveyor belts 7 and are moved by the conveyor belts 7. The two limit plates 7a respectively limit the two side edges of the PCB board. In the preparation state, the width of the entire mounting frame 1 is smaller and can enter between the two groups of conveyor belts 7. After adjusting the height position of the mounting frame 1, it is switched to the placement state, and the two plug boards 1b protrude and enter between the limit plate 7a and the conveyor belt 7, and the mounting frame 1 is placed on the two conveyor belts 7 and is moved by the conveyor belts 7.

[0035] Please refer to Figure 3 、 Figure 4 and Figure 5 For the first driver 2, optionally, it includes: a stepping motor 2a, a connecting part 2b, and two connecting rods 2c. The connecting part 2b is rotatably connected to the middle position of the mounting frame 1. The stepping motor 2a drives the connecting part 2b to rotate. The first ends of the two connecting rods 2c are respectively hinged to opposite sides of the connecting part 2b, and the second ends of the two connecting rods 2c are respectively hinged to the two plug boards 1b.

[0036] The braking module 3 is arranged on the mounting frame 1 to stop the mounting frame 1 relative to the conveyor belt 7 of the reflow soldering equipment.

[0037] Optionally, in the first setting, the braking module 3 is two groups of electromagnets, which are respectively arranged at positions where the two plug boards 1b are away from the mounting frame 1. That is, when the electromagnets are powered off, the mounting frame 1 is placed on the conveyor belt 7. After the electromagnets are powered on, the two side plates 1a are adsorbed to the limit plate 7a, and the mounting frame 1 no longer moves with the conveyor belt 7.

[0038] Optionally, in the second setting, the first driver 2 and the two plug boards 1b can also be used as the above-mentioned braking module 3 at the same time. Specifically, the first driver 2 enables the two plug boards 1b to have, relative to the mounting frame 1: a braking state with a longer protrusion. That is, in the braking state, the two plug boards 1b respectively abut against the vertical inner walls of the two limit plates 7a, and the mounting frame 1 no longer moves with the conveyor belt 7. Compared with the first setting, the structure is simpler.

[0039] The temperature measuring head 4 is arranged on the mounting frame 1 and is used to measure the temperature inside the reflow soldering equipment.

[0040] The connecting line 5 is connected to the mounting frame 1, and the outer surface of the connecting line 5 also has a scale for displaying the length. After the mounting frame 1 stops relative to the conveyor belt 7 of the reflow soldering equipment, the approximate position of the mounting frame 1 inside the reflow soldering equipment is determined through the scale on the connecting line 5.

[0041] For the stepper motor 2a and the temperature measuring head 4, a power supply can be provided on the mounting bracket 1. Correspondingly, when the braking module 3 is two sets of electromagnets, the two sets of electromagnets can also be powered by this power supply.

[0042] Please refer to Figure 1 , optionally, the wiring of the stepper motor 2a and the wiring of the temperature measuring head 4 are both arranged on the connecting wire 5. That is, the connecting wire 5 is an outer sleeve, and the wiring of the stepper motor 2a and the wiring of the temperature measuring head 4 pass through this outer sleeve together. Correspondingly, when the braking module 3 is two sets of electromagnets, the wiring of the two sets of electromagnets also passes through this outer sleeve. Compared with providing a power supply on the mounting bracket 1, in this way, by connecting the power supply externally through the wiring, the power supply does not need to enter the reflow soldering equipment along with the mounting bracket 1.

[0043] Please refer to Figure 3 , further, the rotating shaft 2b1 of the connecting portion 2b is hollow to allow the wiring of the temperature measuring head 4 to pass through. That is, the output shaft of the stepper motor 2a is not directly connected to the rotating shaft 2b1 of the connecting portion 2b, and the two can be driven by gears. A through hole is provided on this rotating shaft 2b1, and the wiring of the temperature measuring head 4 passes through this through hole from top to bottom and is arranged on the connecting wire 5 together with the connection wire of the stepper motor 2a.

[0044] The remote control end 6 is provided with a display screen 6a for displaying the data of the temperature measuring head 4 and controls the first drive 2 and the braking module 3. When the braking module 3 is two sets of electromagnets, the remote control end 6 controls the energization and de-energization of the electromagnets; when the first drive 2 and the two plug boards 1b serve as the braking module 3 at the same time, the remote control end 6 controls the forward and reverse rotation of the stepper motor 2a.

[0045] Briefly describe the working principle of this utility model. When the temperature of the reflow soldering equipment is abnormal, the temperature detection device is placed on the conveyor belt 7 of the reflow soldering equipment, and the conveyor belt 7 takes the temperature detection device into the reflow soldering equipment. The temperature measuring head 4 measures the temperature at various positions in the reflow soldering equipment. When the measured temperature value is abnormal, the temperature detection device stops relative to the conveyor belt 7, and then the conveyor belt 7 is paused to allow the temperature measuring head 4 to continue measuring for a period of time; after determining that the temperature at this position is abnormal, the position of the temperature detection device in the reflow soldering equipment can be corresponding according to the scale on the connecting wire 5 to determine the position where the temperature in the reflow soldering equipment is abnormal.

Claims

1. A temperature detection device for reflow soldering, characterized in that: include: A mounting frame (1), with plug plates (1b) being retractable relative to the mounting frame (1) being provided on opposite sides; A first drive (2) is arranged on the mounting frame (1) to drive the two plug boards (1b) to move closer to or farther from each other, so that the two plug boards (1b) have: a shorter extended ready state and a longer extended placement state relative to the mounting frame (1); A brake module (3) is arranged on the mounting frame (1) to stop the mounting frame (1) relative to a conveyor belt (7) of a reflow soldering device; A temperature measuring head (4) is arranged on the mounting frame (1); A connecting wire (5) is connected to the mounting frame (1), and the outer surface of the connecting wire (5) is also provided with a scale indicating the length; The remote control terminal (6) is provided with a display screen (6a) for displaying data of the temperature measuring head (4), and controls the first drive (2) and the brake module (3).

2. A temperature detection device for reflow soldering according to claim 1, characterized in that: The first drive (2) comprises: a stepper motor (2a), a connecting part (2b) and two connecting rods (2c); the connecting part (2b) is rotatably connected to the middle position of the mounting frame (1), and the stepper motor (2a) drives the connecting part (2b) to rotate; the first ends of the two connecting rods (2c) are respectively hinged to the opposite sides of the connecting part (2b), and the second ends of the two connecting rods (2c) are respectively hinged to the two plug plates (1b).

3. A temperature detection device for reflow soldering according to claim 2, characterized in that: The first drive (2) and the two plug boards (1b) are also the brake module (3). The first drive (2) enables the two plug boards (1b) to have a brake state in which they are extended further relative to the mounting frame (1).

4. A temperature detection device for reflow soldering according to claim 2, characterized in that: The wiring of the stepping motor (2a) and the wiring of the temperature measuring head (4) are both arranged on the connecting line (5).

5. A temperature detection device for reflow soldering according to claim 4, characterized in that: The rotating shaft (2b1) of the connecting portion (2b) is hollow and is used for the wiring of the temperature measuring head (4) to pass through.

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