Heating workbench

Abstract

The utility model discloses a heating workbench, which relates to the technical field of heating and comprises a base, a plurality of supporting columns are fixedly connected above the base, two fixing frames are fixedly connected above the supporting columns, and a low-temperature preheating platform, a high-temperature working platform and a low-temperature precooling platform are arranged between the two fixing frames. A high-temperature working platform is arranged on the base, a positioning pressing plate is arranged above the high-temperature working platform to position and fix a PCB substrate, two transposition moving devices are arranged on one side of the base, the transposition moving devices drive gears to rotate through internal motors to move along racks meshed with the gears, and a servo motor drives two cams in opposite directions to rotate. When the PCB substrate is heated, the upper supports are driven to get away from or get close to each other, then the clamping plates at the front ends of the supports are controlled to clamp and expand, the PCB substrate is clamped and moved, the PCB substrate is heated through the low-temperature preheating platform and the low-temperature pre-cooling platform, the temperature change of the PCB substrate is slowly transited, and bending deformation caused by rapid temperature change of the PCB substrate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a heating workbench. Background Art

[0002] The PCB substrate needs to be fully heated before soldering components at corresponding positions to reduce the temperature difference during soldering and reduce thermal stress. At the same time, it can promote the wetting of the solder, thereby obtaining better soldering quality.

[0003] In the process of heating the PCB substrate, it is necessary to ensure the accuracy and stability of the heating temperature to avoid deformation, burning and other problems of the PCB substrate caused by too high or too low temperature. If the temperature of the PCB substrate body lacks a transition from room temperature to high temperature, the temperature rises or drops sharply, which will cause the PCB substrate to bend and deform. Therefore, a heating workbench is proposed to solve the above problems. Utility Model Content

[0004] In order to solve the above technical problems, a heating workbench is provided. This technical solution solves the problem that the PCB substrate may be bent or deformed due to a sharp increase or decrease in temperature during the heating process of the PCB substrate.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A heating workbench comprises a base, wherein a plurality of support columns are fixedly connected above the base, two fixing frames are fixedly connected above the support columns, a low-temperature preheating platform is arranged between the two fixing frames, the low-temperature preheating platform is fixedly connected to the top of the base, a high-temperature working platform is arranged on one side of the low-temperature preheating platform, the high-temperature working platform is fixedly connected to the top of the base, a low-temperature precooling platform is arranged on the side of the high-temperature working platform away from the low-temperature preheating platform, the low-temperature precooling platform is fixedly connected to the top of the base, a positioning plate is arranged above the high-temperature working platform, the positioning plate is connected to the connecting block through the connecting holes at both ends thereof, the lower ends of the connecting blocks are fixedly connected to the connecting frames, the lower ends of the connecting frames are fixedly connected to the output ends of the electric cylinders, the bottom of the electric cylinders is fixedly connected to the top of the base through a mounting seat, a welding mechanism is arranged between the two electric cylinders, the welding mechanism is fixedly connected to the upper end of the base, two sets of slide rails are arranged on one side of the upper side of the base, a rack is arranged on one side of the slide rail, the rack is fixedly connected to the upper end of the base, and two indexing moving devices are arranged above the slide rails.

[0007] Preferably, the transfer moving device includes a moving block, the moving block is slidably connected to the slide rail through a slide groove below, a gear is provided on one side of the moving block, the gear is fixedly connected to the motor output end of the moving block through a connecting shaft, a servo motor is installed above the moving block, the output end of the servo motor is fixedly connected to two cams, rollers are provided above the two cams, the middle parts of the rollers are rotatably connected to a bracket, the bracket is L-shaped, the middle part of one end of the bracket is slidably connected to a fixed shaft, the two ends of the fixed shaft are fixedly connected to the inner wall of the fixed frame, a spring is provided between the top of the bracket and the inner wall of the fixed frame, the spring is sleeved on the connecting shaft, and two clamping plates are provided on one side of the fixed frame, and the two clamping plates are respectively fixedly connected to the side faces of the bracket.

[0008] Preferably, the low-temperature preheating platform, the high-temperature working platform and the low-temperature pre-cooling platform are all provided with heating devices inside and are electrically connected to an external power supply.

[0009] Preferably, the gear is meshed with a rack, and the indexing moving device can reciprocate along the rack driven by a motor inside the moving block.

[0010] Preferably, the upper end of the welding mechanism extends to above the high-temperature working platform and is provided with a welding head.

[0011] Preferably, a limiting groove for the PCB substrate to pass through is provided in the middle of the fixing frame.

[0012] Preferably, the two cams are arranged in opposite directions.

[0013] Preferably, a plurality of through holes are provided in the middle of the positioning pressure plate for performing welding operations on the PCB substrate below.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. By setting up a low-temperature preheating platform to heat the PCB substrate, the temperature of the PCB substrate body can be transitioned from room temperature to the high temperature of the working area, so as to avoid bending and deformation of the PCB substrate after rapid heating, and also ensure the performance and deformation requirements of the incoming materials for the process to be completed in the working area.

[0016] 2. Place the soldered PCB substrate on the low-temperature pre-cooling platform through the transfer moving device, and slowly cool the PCB substrate by slowly lowering the temperature of the low-temperature pre-cooling platform to avoid bending deformation caused by a sudden drop in temperature of the PCB substrate, which affects product quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0019] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the transfer moving device in the utility model;

[0021] Figure 5 It is a front view structural schematic diagram of the transfer moving device in the utility model.

[0022] The numbers in the figure are:

[0023] 1. Base; 11. Slide rail; 12. Rack; 2. Support column; 3. Fixed frame; 4. Low-temperature preheating platform; 41. High-temperature working platform; 42. Low-temperature pre-cooling platform; 5. Electric cylinder; 51. Connecting frame; 52. Connecting block; 53. Positioning plate; 6. Welding mechanism; 7. Transfer moving device; 71. Moving block; 72. Gear; 73. Servo motor; 74. Cam; 75. Roller; 76. Bracket; 77. Fixed frame; 78. Spring; 79. Clamping plate. DETAILED DESCRIPTION

[0024] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0025] like Figure 1-3As shown, a heating workbench comprises a base 1, a plurality of support columns 2 are fixedly connected above the base 1, two fixing frames 3 are fixedly connected above the support columns 2, a limiting groove is provided in the middle of the fixing frame 3 for a PCB substrate to pass through, the limiting groove can support and fix the PCB substrate thereon, a low temperature preheating platform 4 is provided between the two fixing frames 3, the low temperature preheating platform 4 is fixedly connected to the top of the base 1, the low temperature preheating platform 4 preheats the PCB substrate when the PCB substrate passes through, so that it transitions from room temperature to working high temperature, and a high temperature working The high temperature working platform 41 is fixedly connected to the top of the base 1, and the high temperature working platform 41 heats the PCB substrate to the working temperature. A low temperature pre-cooling platform 42 is provided on the side of the high temperature working platform 41 away from the low temperature pre-heating platform 4, and the low temperature pre-cooling platform 42 is fixedly connected to the top of the base 1, and the low temperature pre-cooling platform 42 cools and heats the PCB substrate, so that the temperature of the PCB substrate drops slowly to avoid deformation of the PCB substrate caused by a sudden drop in temperature. The low temperature pre-heating platform 4, the high temperature working platform 41, and the low temperature pre-cooling platform 42 are all provided with heating devices and connected to an external power supply. The high temperature working platform 41 is connected to the PCB substrate 41, and the three platforms have independent temperature control systems, which can be set to different temperatures to meet the performance and process requirements of different PCB substrates. A positioning platen 53 is provided above the high temperature working platform 41. The positioning platen 53 descends and is close to the PCB substrate so that the high temperature working platform 41 can fully heat the PCB substrate and position and fix the PCB substrate. A plurality of through holes are provided in the middle of the positioning platen 53 for welding the PCB substrate below. The positioning platen 53 is connected to the connecting block 52 through the connecting holes at both ends thereof. The lower ends of the connecting blocks 52 are fixedly connected to the connecting frame 51. The lower ends of the connecting frames 51 are fixedly connected to the output ends of the electric cylinders 5. The electric cylinders 5 can drive the connecting frames 51 to move up and down, thereby driving the positioning plate 53 to move. The bottom of the electric cylinders 5 is fixedly connected to the top of the base 1 through a mounting seat. A welding mechanism 6 is provided between the two electric cylinders 5. The welding mechanism 6 is fixedly connected to the upper end of the base 1. The upper end of the welding mechanism 6 extends to the top of the high-temperature working platform 41 and is provided with a welding head. Two sets of slide rails 11 are provided on one side of the top of the base 1. A rack 12 is provided on one side of the slide rail 11. The rack 12 is fixedly connected to the upper end of the base 1, and two transfer moving devices 7 are provided above the slide rail 11.

[0026] like Figure 4-5As shown, the indexing moving device 7 includes a moving block 71, which is slidably connected to the slide rail 11 through a sliding groove below. A gear 72 is provided on one side of the moving block 71. The gear 72 is fixedly connected to the motor output end inside the moving block 71 through a connecting shaft. The gear 72 is meshed with the rack 12. The indexing moving device 7 can reciprocate along the rack 12 driven by the motor inside the moving block 71. A servo motor 73 is installed above the moving block 71. Two cams 74 are fixedly connected to the output end of the servo motor 73. The two cams 74 are arranged in opposite directions. Rollers 75 are provided above the two cams 74. The middle part of the rollers 75 is rotatably connected to a bracket 76. The bracket 76 is L-shaped, and the middle part of one end of the bracket 76 is slidably connected to the A fixed shaft is connected, and the bracket 76 can move up and down along the fixed shaft. The two ends of the fixed shaft are fixedly connected to the inner wall of the fixed frame 77. A spring 78 is provided between the top of the bracket 76 and the inner wall of the fixed frame 77. The spring 78 is sleeved with the connecting shaft. Two clamping plates 79 are provided on one side of the fixed frame 77. The two clamping plates 79 are respectively fixedly connected to the side surfaces of the bracket 76. The spring 78 applies elastic force to push the bracket 76 downward, so that the roller 75 connected to one end of the bracket 76 is tightly against the cam 74. The cam 74 rotates under the drive of the servo motor 73. Since the two cams 74 are in opposite directions, the servo motor 73 controls the cam 74 to rotate 180°. The two clamping plates 79 change from separation to clamping, which can clamp the PCB substrate and then move it.

[0027] The principle of the utility model is as follows: the PCB substrate is taken out from the storage bin into the limiting groove of the fixing frame 3 and flows to the top of the low-temperature preheating platform 4. The low-temperature preheating platform preheats the PCB substrate according to the set temperature so that the PCB substrate is evenly and slowly heated to a certain temperature. Then, the servo motor 73 in the indexing moving device 7 on the left side controls the cam 74 to rotate 180° so that the clamping plate 79 clamps the PCB substrate. Then, the motor in the moving block 71 drives the gear 72 to rotate, driving the indexing moving device 7 to move along the slide rail 11 toward the high-temperature working platform 41, so that the PCB substrate moves to the top of the high-temperature working platform 41. Then, the servo motor 73 controls the cam 74 to rotate 180°. The servo motor 73 controls the cam 74 to rotate 180° so that the clamping plate 79 releases the PCB substrate and returns to the low-temperature preheating platform 4. Then, the electric cylinder 4 drives the positioning plate 53 to move downward so that the PCB substrate is close to the high-temperature working platform 41. The high-temperature working platform 41 heats the PCB substrate so that the PCB substrate is heated to a required temperature. The welding mechanism 6 completes the corresponding process steps. Then, the indexing moving device 7 on the right moves to the high-temperature working platform 41. The servo motor 73 controls the cam 74 to rotate 180° so that the clamping plate 79 clamps the PCB substrate. Then, the PCB substrate is driven to move to the top of the low-temperature pre-cooling platform 42 to slowly cool the PCB substrate and then recovered to the receiving bin.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A heating workbench, characterized in that: The invention comprises a base (1), a plurality of support columns (2) are fixedly connected to the top of the base (1), two fixing frames (3) are fixedly connected to the top of the support columns (2), a low-temperature preheating platform (4) is arranged between the two fixing frames (3), the low-temperature preheating platform (4) is fixedly connected to the top of the base (1), a high-temperature working platform (41) is arranged on one side of the low-temperature preheating platform (4), the high-temperature working platform (41) is fixedly connected to the top of the base (1), a low-temperature precooling platform (42) is arranged on the side of the high-temperature working platform (41) away from the low-temperature preheating platform (4), the low-temperature precooling platform (42) is fixedly connected to the top of the base (1), and a positioning plate is arranged on the top of the high-temperature working platform (41). (53), the positioning pressing plate (53) is connected to the connecting block (52) through the connecting holes at both ends thereof, the lower end of the connecting block (52) is fixedly connected to the connecting frame (51), the lower end of the connecting frame (51) is fixedly connected to the output end of the electric cylinder (5), the bottom of the electric cylinder (5) is fixedly connected to the top of the base (1) through the mounting seat, a welding mechanism (6) is provided between the two electric cylinders (5), the welding mechanism (6) is fixedly connected to the upper end of the base (1), two groups of slide rails (11) are provided on one side of the upper side of the base (1), a rack (12) is provided on one side of the slide rail (11), the rack (12) is fixedly connected to the upper end of the base (1), and two transfer moving devices (7) are provided on the upper side of the slide rail (11).

2. A heating workbench according to claim 1, characterized in that: The transfer moving device (7) comprises a moving block (71), the moving block (71) is slidably connected to the slide rail (11) via a slide groove below, a gear (72) is provided on one side of the moving block (71), the gear (72) is fixedly connected to the motor output end inside the moving block (71) via a connecting shaft, a servo motor (73) is installed above the moving block (71), the output end of the servo motor (73) is fixedly connected to two cams (74), and rollers (75) are provided above the two cams (74), The middle part of the roller (75) is rotatably connected to a bracket (76), the bracket (76) is L-shaped, the middle part of one end of the bracket (76) is slidably connected to a fixed shaft, the two ends of the fixed shaft are fixedly connected to the inner wall of the fixed frame (77), a spring (78) is provided between the top of the bracket (76) and the inner wall of the fixed frame (77), the spring (78) is sleeved with the connecting shaft, and two clamping plates (79) are provided on one side of the fixed frame (77), and the two clamping plates (79) are respectively fixedly connected to the side of the bracket (76).

3. A heating workbench according to claim 1, characterized in that: The low-temperature preheating platform (4), the high-temperature working platform (41), and the low-temperature precooling platform (42) are all provided with heating devices inside and are electrically connected to an external power source.

4. A heating workbench according to claim 2, characterized in that: The gear (72) is meshed with the rack (12), and the indexing moving device (7) can reciprocate along the rack (12) driven by the motor inside the moving block (71).

5. A heating workbench according to claim 1, characterized in that: The upper end of the welding mechanism (6) extends to the top of the high-temperature working platform (41) and is provided with a welding head.

6. A heating workbench according to claim 1, characterized in that: The middle part of the fixing frame (3) is provided with a limiting groove for the PCB substrate to pass through.

7. A heating workbench according to claim 2, characterized in that: The two cams (74) are arranged in opposite directions.

8. A heating workbench according to claim 1, characterized in that: The middle portion of the positioning pressing plate (53) is provided with a plurality of through holes for performing welding operations on the PCB substrate below.

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