Welding preprocessing device and welding device

Abstract

The utility model provides a welding preprocessing device and a welding device, the preprocessing device comprises a spraying device, a preheating device and a first driving device, the spraying device sprays soldering flux, and the preheating device heats a workpiece; when the spraying device works, the spraying device is located in a spraying area. The preheating device is located in a preheating area during operation; the first driving device is used for driving the preheating device to be far away from the spraying area; according to the welding device, the tin soldering device and the clamping device are additionally arranged on the basis of the preprocessing device, the risk of burning explosion of scaling powder is eliminated through dynamic isolation, safety and compactness are both considered, and the equipment space utilization rate and the operation efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of welding technology, and more specifically, relates to a welding pre-processing device and a welding device. Background Technology

[0002] With the rapid development of electronic components towards refinement and miniaturization, the wiring density of circuit boards has significantly increased, placing higher demands on the precision and uniformity of automated soldering processes. In the pre-processing stage before soldering, flux spraying and subsequent circuit board preheating are crucial steps to ensure soldering quality. The flux spraying device forms a uniform coating on the circuit board surface through atomization, while the preheating device promotes flux activity and removes volatile components through heating, thereby improving soldering reliability.

[0003] However, existing pre-processing devices present several technical challenges in practical applications. Firstly, there are safety risks. Flux is typically flammable, and during spraying, a layer of flux particles of a certain concentration forms in the air surrounding the spraying device. If the preheating device and the spraying device are too close, the high temperature generated by the preheating device may cause the flux particles to reach their ignition point, leading to combustion or explosion. Secondly, there is a lack of structural rationality. To reduce safety risks, traditional solutions increase the physical distance between the spraying device and the preheating device for safety isolation. However, this directly results in an expansion of the overall equipment size, occupying more production space. Especially in precision electronics manufacturing scenarios, the need for equipment compactness and safety clearance requirements create an irreconcilable conflict.

[0004] How to achieve a compact design for the pre-processing device while ensuring that the preheating device does not affect the temperature of the working area of ​​the spraying device has become a core technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a welding pre-processing device to solve the technical problems of insufficient safety and unreasonable structure in the prior art.

[0006] To achieve the above objectives, this utility model is accomplished by the following specific technical means:

[0007] A welding pre-processing apparatus includes a spraying device for spraying flux and a preheating device for heating the workpiece to be processed; the spraying device is located within the spraying area when it is in operation, and the preheating device is located within the preheating area when it is in operation; it also includes a first driving device for driving the preheating device away from the spraying area.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] During spraying operations, the first driving device automatically moves the preheating device away from the spraying area, physically isolating the high-temperature surface of the preheating device from the flux particle suspension zone, reducing the risk of flux particle explosion to zero. Compared to traditional safety designs that rely on fixed spacing, this invention completely eliminates the coexistence of high-temperature heat sources and combustible particles through a dynamic isolation mechanism, significantly improving the inherent safety level of the welding pre-processing procedure. Traditional safety isolation schemes require a fixed safety distance, causing the equipment volume to increase linearly with the number of process sections. This invention uses a driving device to achieve on-demand displacement of the preheating device, allowing it to return to its original position during non-spraying operations, making the overall equipment structure more compact and rational.

[0010] Furthermore, to minimize the overall space occupied by the equipment, the spraying area and the preheating area at least partially overlap.

[0011] Furthermore, it also includes a second driving device for driving the spraying device away from the overlapping area of ​​the spraying area and the preheating area. The spraying device and the preheating device have the function of moving away from each other, so that the overlap between the spraying area and the preheating area is higher, and the structure is more compact while ensuring the safety performance of the equipment.

[0012] The first drive device has two forms: sliding and swing.

[0013] The first type is a sliding type. The first driving device includes a support base, a guide rail, and a first power output mechanism. The preheating device is mounted on the pre-support base, and the first power output mechanism drives the support base to reciprocate along the guide rail. The sliding type has a simple structure and high operational stability.

[0014] The second type is a swing type. The first driving device includes a base, a swing arm, and a second power output mechanism. One end of the swing arm is fixedly supported to the bottom of the preheating device, and the other end is hinged to the base. The second power output mechanism drives the swing arm to swing, thereby causing the preheating device to swing. The swing-type structure allows the preheating device to flip away from the preheating area, making more efficient use of vertical space and making the overall equipment more compact.

[0015] Furthermore, the second power output mechanism is connected to the swing arm via the second transmission mechanism; the second transmission mechanism includes a vertical guide rail, a second base, and a connecting push rod; the second base slides along the vertical guide rail; one end of the connecting push rod intersects with the second base, and the other end is hinged to the upper part of the swing arm or the preheating device; the second power output mechanism drives the second base to slide in the vertical direction, and the connecting push rod drives the swing arm to swing, thereby driving the preheating device to swing.

[0016] To improve the coordination between the movement of the preheating device and the spraying device, the following two linkage methods are used:

[0017] For cases where the first driving device is a sliding type, it also includes a second support and a second guide rail; the spraying device is mounted on the second support, and the second support is connected to the first power output mechanism through a first transmission mechanism; the first power output mechanism drives the second support to move along the second guide rail.

[0018] In the case where the first driving device is a swing type: the spraying device is mounted on the second base.

[0019] Furthermore, the preheating device is provided in two or more parts, and the first driving device is provided in two or more parts accordingly, so that the individual volume of the preheating device is smaller, reducing the compression it causes to the space occupied by other workpieces, and the required stroke for movement is smaller.

[0020] A pre-processing welding apparatus comprising a spraying device, a preheating device, a soldering device, and a clamping device for carrying the workpiece to be welded through each process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the welding pre-processing device;

[0022] Figure 2 This is a schematic diagram of the disassembled structure of Embodiment 1 of the welding pre-processing device;

[0023] Figure 3 This is a second state diagram of Embodiment 1 of the welding pre-processing device;

[0024] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the welding pre-processing device;

[0025] Figure 5 This is a second state diagram of Embodiment 2 of the welding pre-processing device;

[0026] Figure 6 This is a schematic diagram of the welding device.

[0027] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0028] 11. Spraying device; 12. Preheating device; 21. Support seat; 22. Guide rail; 23. Second support seat; 24. Second guide rail; 31. Base; 32. Swing arm; 33. Vertical guide rail; 34. Second base; 35. Connecting push rod; 41. Soldering device; 42. Clamping device; 51. Connecting rod; 52. Cylinder. Detailed Implementation

[0029] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0030] Example 1:

[0031] like Figures 1 to 3 As shown, this utility model provides a welding pre-processing device, including a spraying device 11 for spraying flux and a preheating device 12 for heating the workpiece to be processed. The spraying device 11 can evenly cover the surface of the workpiece with flux, forming a thin flux coating. This coating effectively removes oxides from the workpiece surface, reduces the surface tension of the solder, and provides a good foundation for subsequent welding. Simultaneously, the preheating device 12 can heat the workpiece. The heat generated inside is transferred to the workpiece through heat conduction or heat radiation, fully activating the active substances in the flux, enhancing the welding effect, and accelerating the evaporation of volatiles, reducing defects such as porosity and incomplete welds during welding, thus improving welding quality and stability.

[0032] When the spraying device 11 is in operation, it is located in the spraying area to ensure accurate spraying position so that the flux can be sprayed onto the designated area of ​​the workpiece; when the preheating device 12 is in operation, it is located in the preheating area under the driving action to heat the workpiece that has been sprayed with flux.

[0033] The device also includes a first driving device, which drives the preheating device 12 away from the spraying area. When the spraying device 11 is in operation, the first driving device drives the preheating device 12 to a safe position to avoid the high temperature environment from interfering with the state of the flux particles sprayed by the spraying device 11, thus ensuring the smooth progress of the spraying process.

[0034] The spraying area and the preheating area overlap at least partially, enabling seamless process connection within a limited space. The spraying device 11, located in the spraying area, sprays flux onto the workpiece surface during operation to form a coating. The preheating device 12 heats the workpiece in the preheating area. The overlapping area allows the workpiece to enter the preheating state after spraying with a short movement, shortening the space required for both movements. The first drive device drives the preheating device 12 into the overlapping area during non-spraying periods and drives it out during spraying. This utilizes the overlapping area to shorten the process path and avoids the coexistence of high temperature and flux particle suspension areas through dynamic displacement, balancing space utilization and safety requirements.

[0035] The first driving device of the welding pre-processing device provided in this embodiment includes a support base 21, a guide rail 22 and a first power output mechanism. The preheating device 12 is installed on the support base 21 and can move together with the support base 21. The guide rail 22 is a linear guide rail, and its bottom is fixed to the device base by bolts. Guide grooves are provided on both sides of the guide rail 22. The bottom of the support base 21 is provided with a slider that matches the guide groove. The slider is embedded in the guide groove, and through the first power output mechanism, the support base 21 can move linearly back and forth along the guide rail 22.

[0036] The device also includes a second support 23 and a second guide rail 24. The second guide rail 24 is also a linear guide rail, which is parallel to the guide rail 22 and fixed to the device base. The bottom of the second support 23 is provided with a slider that matches the second guide rail 24. The slider is embedded in the guide groove of the second guide rail 24, allowing the second support 23 to move linearly along the second guide rail 24. The spraying device 11 is fixed to the upper plane of the second support 23 by bolts.

[0037] A connecting rod 51 is provided between the support seat 21 and the second support seat 23. Both ends of the connecting rod 51 are hinged to the support seat 21 and the second support seat 23 respectively via hinge shafts. Additionally, a cylinder 52 can be provided on the device. The piston rod end of the cylinder 52 is connected to the second support seat 23. When the piston rod of the cylinder 52 extends, it pushes the second support seat 23 to move away from the support seat 21 along the second guide rail 24. Due to the connecting action of the connecting rod 51, the support seat 21 moves inward along the guide rail 22. When two sets of support seats 21 are provided on the guide rail 22, the distance between the two sets of support seats 21 decreases, causing the preheating devices 12 on the support seats 21 to move closer together. Conversely, when the piston rod of the cylinder 52 retracts, it pulls the second support seat 23 to move closer to the support seat 21 along the second guide rail 24, while the support seat 21 moves outward along the guide rail 22, increasing the distance between the two sets of support seats 21 and causing the preheating devices 12 on the support seats 21 to move further apart.

[0038] Example 2:

[0039] like Figure 4 , Figure 5 As shown, in this embodiment, the first driving device includes a base 31, a swing arm 32, and a second power output mechanism. The base 31 is a block structure, fixedly installed at the bottom of the device, serving as the supporting foundation for the swing arm 32. The swing arm 32 is rod-shaped, with one end fixedly supported at the bottom of the preheating device 12 by welding or bolting, and the other end mounted on the base 31 via a hinge shaft, allowing the swing arm 32 to swing around the hinge shaft in a vertical plane, thereby driving the preheating device 12 to achieve angular changes.

[0040] The second power output mechanism is connected to the swing arm 32 via a second transmission mechanism. The second transmission mechanism includes a vertical guide rail 33, a second base 34, and a connecting push rod 35. The vertical guide rail 33 is vertically fixed to one side of the base 31, and the surface of the guide rail is provided with a sliding groove. A slider adapted to the sliding groove is installed at the bottom of the second base 34, which can slide up and down along the vertical guide rail 33. The connecting push rod 35 is a rod-shaped component, one end of which is connected to the second base 34 via a hinge shaft, and the other end is hinged to the upper part of the swing arm 32 or the outside of the preheating device 12 via a hinge shaft.

[0041] The second power output mechanism can be in the form of a cylinder or an electric push rod. When the second power output mechanism is working, it drives the second base 34 to slide up or down along the vertical guide rail 33. For example, when the second base 34 slides down along the vertical guide rail 33, the lower end of the connecting push rod 35 moves down accordingly. Since the two ends of the connecting push rod 35 are hinged, its upper end will push the swing arm 32 to swing towards the spraying area, thereby causing the preheating device 12 to move inward at a smaller angle and away from the spraying area. When two sets of preheating devices 12 are provided, the included angle between the two sets of preheating devices 12 will become smaller and they will move closer to each other. When the second base 34 slides up, the connecting push rod 35 pulls the swing arm 32 to swing away from the spraying area, and the preheating device 12 moves outward at a larger angle, effectively avoiding affecting the normal operation of the spraying device 11.

[0042] This structure achieves the switching of the preheating device 12 in space through the swing of the swing arm 32. Utilizing a vertical motion path avoids horizontal space occupation, making the device layout more compact. Simultaneously, the second transmission mechanism converts the linear motion of the second power output mechanism into the swing of the swing arm 32, realizing efficient power transmission and motion form conversion. This ensures that the preheating device 12 can switch positions between the spraying area and the preheating area as needed, meeting the safety and efficiency requirements of the welding pre-processing procedure.

[0043] There are two or more preheating devices 12, and correspondingly two or more first driving devices. Each preheating device 12 is mounted on an independent support 21, and each support 21 is distributed along its respective guide rail 22. When multiple workpieces need to be heated simultaneously, the first power output mechanism of each first driving device can independently drive the corresponding support 21, so that multiple preheating devices 12 enter the preheating area synchronously and heat different workpieces respectively. When not in operation, each preheating device 12 can be returned to a safe position by the corresponding first driving device to avoid mutual interference.

[0044] Example 3:

[0045] like Figure 6 As shown, this embodiment provides a welding apparatus using the aforementioned welding pre-processing device, including a spraying device 11, a preheating device 12, a soldering device 41, and a clamping device 42. The spraying device 11 sprays flux onto the workpiece to form a uniform coating on the surface of the workpiece; the preheating device 12 heats the workpiece, and the heat generated is transferred to the surface of the workpiece through thermal radiation, which fully activates the active ingredients in the flux and accelerates solvent evaporation, reducing welding defects; meanwhile, the soldering device 41 is the main part for welding the workpiece, completing the welding operation between workpieces; and the clamping device 42 is used to move the workpiece between different devices, and its mechanical jaws can stably grasp the workpiece and move it along the X, Y, and Z axes to realize the transfer between processes.

[0046] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A welding pre-processing device, characterized in that: It includes a spraying device (11) for spraying flux and a preheating device (12) for heating the workpiece to be processed. When the spraying device (11) is in operation, it is located within the spraying area; when the preheating device (12) is in operation, it is located within the preheating area. It also includes a first drive unit for driving the preheating device (12) away from the spraying area.

2. The welding pre-processing device as described in claim 1, characterized in that: The spraying area and the preheating area at least partially overlap.

3. The welding pre-processing device as described in claim 2, characterized in that: It also includes a second drive unit for driving the spraying device (11) away from the overlapping area of ​​the spraying area and the preheating area.

4. The welding pre-processing device as described in claim 1, characterized in that: The first driving device includes a support base (21), a guide rail (22), and a first power output mechanism; The preheating device (12) is mounted on a support (21), and the first power output mechanism drives the support (21) to reciprocate along the guide rail (22).

5. The welding pre-processing device as described in claim 1, characterized in that: The first drive device includes a base (31), a swing arm (32), and a second power output mechanism; One end of the swing arm (32) is fixedly supported on the bottom of the preheating device (12), and the other end is hinged to the base (31). The second power output mechanism drives the swing arm (32) to swing, thereby causing the preheating device (12) to swing.

6. The welding pre-processing device as described in claim 4, characterized in that: It also includes a second support (23) and a second guide rail (24); the spraying device (11) is disposed on the second support (23), and the second support (23) is connected to the first power output mechanism through the first transmission mechanism; the first power output mechanism drives the second support (23) to move along the second guide rail (24).

7. The welding pre-processing device as described in claim 5, characterized in that: The second power output mechanism is connected to the swing arm (32) of the second transmission mechanism; The second transmission mechanism includes a vertical guide rail (33), a second base (34), and a connecting push rod (35); the second base (34) slides along the vertical guide rail (33); one end of the connecting push rod (35) is connected to the second base (34), and the other end is hinged to the upper part of the swing arm (32) or the preheating device (12); the second power output mechanism drives the second base (34) to slide in the vertical direction, and the connecting push rod (35) drives the swing arm (32) to swing, thereby driving the preheating device (12) to swing.

8. The welding pre-processing apparatus as described in claim 7, characterized in that: The spraying device (11) is mounted on the second base (34).

9. The welding pre-processing apparatus according to any one of claims 4-8, characterized in that: The preheating device (12) is provided in two or more, and the first driving device is provided in two or more correspondingly.

10. A welding apparatus using the welding pre-processing apparatus according to any one of claims 1-8, characterized in that: It includes a spraying device (11), a preheating device (12), a soldering device (41), and a clamping device (42) that drives the workpiece to be soldered to complete each process.

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