CN210388062U

CN210388062U - Manual welding jig of PCB

Info

Publication number: CN210388062U
Application number: CN201822213794.6U
Authority: CN
Inventors: 张萍; 顾为为
Original assignee: Shijiazhuang Boom Electronics Co ltd
Current assignee: Shijiazhuang Boom Electronics Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-04-24
Anticipated expiration: 2028-12-27

Abstract

The utility model provides a manual welding jig of PCB, including clamp plate and roof, clamp plate and roof pass through quick detach device and connect, and open at the middle part of clamp plate has the operation opening, and the roof is provided with the ejection jar, the ejection jar includes the flat board of fixed connection in the piston rod outer end, and the ejection jar is connected with on-off control device. Through the scheme, the PCB can be subjected to turn-over welding without being clamped by two hands of an operator, the clamp can be further provided with a plurality of ejection cylinders to adapt to the condition that the height of the elements to be welded is different or the elements to be welded are lower than the welded elements, and the coaxial arrangement of the communication hole and the piston shaft enables the manufacture of the clamp to be relatively simple and reduces the cost.

Description

Manual welding jig of PCB

Technical Field

The utility model belongs to the technical field of PCB (Chinese name is printed circuit board) welding, concretely relates to manual welding jig of PCB.

Background

The existing PCB welding technology mostly adopts machine dip soldering to carry out mass production, but because some PCBs have two-sided paster during the design and the paster component is higher, the dip soldering effect of the side becomes worse or even the welding cannot be carried out, so that the current production enterprises weld the component by hand after the dip soldering of other components is finished. During manual soldering, after components to be soldered (such as a plurality of capacitors) are inserted into corresponding positions on a PCB, a board is pressed on the components to be soldered, and then the PCB and the pressing board are simultaneously held by hands and turned over, and then soldering is performed. However, in the process of turning over, the uneven application of force by hand often causes the side deflection and the non-bonding of the bottom surface of the element to be welded, which results in the reduction of the appearance quality of the product. In order to overcome the above disadvantages, especially for components to be welded with different heights or when the components to be welded are lower than the welded components, some manufacturers may manufacture a special mold for clamping, but the special mold is usually designed for only one product, which not only has poor applicability, narrow application range and high cost, but also increases the selling price of the product after the cost is spread into the corresponding product, thereby affecting the product sales volume.

Disclosure of Invention

The utility model aims to solve the technical problem that a need not to lean on the manual welding jig of operative employee's both hands centre gripping can carry out turn-over welding's PCB.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a manual welding jig of PCB, includes clamp plate and roof, clamp plate and roof pass through quick detach device and connect, and open at the middle part of clamp plate has the operation opening, and the roof is provided with the ejection jar, the ejection jar includes the flat board of fixed connection in the piston rod outer end, and the ejection jar is connected with on-off control device.

Further: the switch control device comprises a voltage regulating device.

Further: the pushing cylinder is a single-acting cylinder reset by external force.

Further: the number of the pushing cylinders is more than 3, and the cylinder body axial point connecting lines of every 3 mutually adjacent pushing cylinders form a regular triangle A; the cross section of the flat plate is circular, and the diameter of the flat plate is 0.9-1 time of the side length of the regular triangle A.

Further: the pushing cylinder is provided with a communication hole which is coaxial with the piston shaft, and the diameter of the communication hole is larger than that of the piston shaft.

Further: the top plate comprises a cylinder body plate, cylinder holes of all the top pushing cylinders are formed in the cylinder body plate, and the cylinder body plate is also provided with a communicating cavity connected with all the cylinder holes; the cylinder plate is connected with the pressing plate through the quick-release device.

Further: the top plate further comprises a vertical plate, and the vertical plate is fixedly connected to the outer edge of the upper surface of the cylinder plate; the vertical plate is connected with the pressing plate through the quick-release device.

Further: the flat plate has a gap with the PCB board to be processed when the piston reaches the maximum stroke.

Further: the vertical plate comprises an upper vertical plate and a lower vertical plate, the upper vertical plate is connected with the pressing plate through the quick-release device, and the lower vertical plate is detachably connected with the upper vertical plate and the cylinder body plate respectively.

Further: and a clamping plate is arranged between the pressing plate and the top plate, and the middle part of the clamping plate is provided with an opening.

Through adopting the technical scheme, the utility model has the technical effect that a need not to lean on the manual welding jig of operative employee's both hands centre gripping and can carry out turn-over welded PCB is provided, this anchor clamps still can set up a plurality of push away and push up the jar and adapt to treat that the welding element height is different or treat that the welding element is less than the condition of welding element, and make it make simple relatively because of the coaxial setting of intercommunicating pore and piston shaft, reduce cost.

Drawings

FIG. 1 is a diagram illustrating the effect of the present invention;

FIG. 2 is a pneumatic schematic of the present invention;

FIG. 3 is a schematic front view of the pressing plate of the present invention;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 3;

fig. 5 is a schematic front view of the top plate of the present invention;

FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;

the device comprises a clamp plate 1, a clamp plate 2, an element to be welded, a PCB 3, a clamp plate 4, a clamp plate 401, a clamp plate main body 402, a clamp groove 403, a positioning groove 404, an operation opening, a top plate 5, a jaw 501, a cylinder plate 502, a cylinder plate 503, a communicating cavity 503, a joint 504, a cylinder body shaft point connecting line 505, an air source 6, a pressure adjusting device 7, a vent valve 8, a top pushing cylinder 9, a flat plate 901, a communicating hole 902, a piston rod 903, a cylinder hole 904, a piston 905, an exhaust valve 10, a vertical plate 11, an upper vertical plate 1101 and a lower vertical plate 1102.

Detailed Description

A preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6.

The utility model discloses a basic technical scheme mainly includes clamp plate 4 and roof 5, and clamp plate 4 and roof 5 pass through quick detach device to be connected, and open at the middle part of clamp plate 4 has operation opening 404, and roof 5 has ejection cylinder 9, and ejection cylinder 9 is connected with on-off control device. The ejection cylinder 9 can be a pneumatic cylinder or a hydraulic cylinder, which has the common characteristics of the existing pneumatic or hydraulic cylinder components, namely, a piston 905 and a cylinder hole 904 (or a cylinder body) matched with the piston 905, and a piston rod 903 is connected to the piston 905; the ejection cylinder 9 of the present invention further comprises a flat plate 901 fixedly connected to the outer end of the piston rod 903.

Since the ejection force for the members 2 to be welded is not generally large, and in order to reduce the overall cost, the ejection cylinder 9 of the present preferred embodiment employs an air cylinder. Therefore, the switch control device can be realized by adopting a mode of having a vent valve 8 communicated with an air source 6 and an exhaust valve 10 communicated with the external atmosphere, can also be realized by adopting a mode of adopting a two-position three-way reversing valve and the like, is the prior art which can complete pressurization and pressure relief of a pushing cylinder 9 and can be used as the switch control device, and the embodiment specifically adopts the first mode. The quick-release device can adopt mechanisms such as a buckle, a clamping jaw or a bolt, and the like, so long as quick disassembly and assembly can be realized; the embodiment is implemented by specifically using the claws 501 which can be opened and automatically reset by means of a spring, and matching with the clamping grooves 402 arranged on the pressing plate main body 401.

In use, the basic solution is to place the PCB 3 to be processed on the pressing plate 4 and expose the turned-over area to be welded in the operation opening 404, then insert the component 2 to be welded (e.g. capacitor) on the non-turned-over PCB 3, then orient the jacking cylinder 9 on the top plate 5 towards the component 2 to be welded, and connect the top plate 5 and the pressing plate 4 through a quick-release device. After connection, the switch control device is operated (namely, the vent valve 8 is opened), the component 2 to be welded is tightly propped against the PCB after the pushing cylinder is pushed upwards, then the whole device is turned over to enable the area to be welded of the PCB to face upwards, an operator welds a welding leg of the component to be welded in the operation opening 404, after welding is finished, the switch control device is operated (namely, the vent valve 8 is closed and the exhaust valve 10 is opened), the pushing force of the pushing cylinder is eliminated, and then the quick-release device is opened to take out the processed PCB 3.

In the embodiment, a pressure regulating device can be added in the switch control device, so that the thrust of the ejection cylinder 9 can be adjusted according to the comprehensive consideration of the weight and the quantity of the components 2 to be welded, and the phenomenon that the PCB 3 is bent and broken due to overlarge ejection force is avoided. The pressure regulating device of the embodiment is composed of a pressure reducing valve and a pressure gauge, and other technical means for pressure regulation in the prior art can also be used.

The utility model discloses a jacking cylinder 9 still can further be preferred the single-action cylinder that external force resets, because to the product of same batch, the jacking stroke height of jacking cylinder is unanimous, need not to push repeatedly and stretch the back and reset again, therefore adopt the single-action cylinder that external force resets, make the cylinder once stretch out after, its extension length can keep unchangeable basically because of frictional force between piston 905 and cylinder wall often, saved the time that the cylinder stretches out repeatedly, accelerate work efficiency, and reduce cylinder wearing and tearing, prolong equipment life.

Since the single flat plate 901 can only hold down a single or a batch of components to be welded 2 having the same height, the single flat plate will not be suitable if the components to be welded are different in height or lower than the components already welded. In order to solve the above problem, the utility model discloses a further be provided with a plurality of push cylinder 9 on roof 5, push cylinder 9's distribution visual need position or be regular repetitive distribution.

In order to further enhance the applicability of the present invention, the ejection cylinders 9 of the preferred embodiment are regularly and repeatedly distributed. The point at which the axis of cylinder bore 904 assumes on the cylinder bore cross-section is first defined herein as the cylinder block axis point. In the preferred embodiment, the cylinder block axis point connecting line 505 of each 3 adjacent ejection cylinders 9 is in a regular triangle (marked as a). In addition, the flat plate 901 is circular, and the diameter of the flat plate is 0.9 to 1 time of the side length of the regular triangle marked by the mark A. The flat plates 901 distributed in this way greatly reduce the gap between the flat plates, so that the situation that the tiny elements to be welded are leaked from the gap and are not pushed is avoided to a certain extent, and the applicability of the equipment is improved.

Although the arrangement of the above-described jack cylinder 9 is already tight, there is a gap therebetween, particularly an inevitable gap at the midpoint of the regular triangle of the mark a, and in order to reduce the gap, the diameter of the plate 901 is reduced as much as possible, and thus the diameter of the cylinder hole 904 must also be reduced. However, since the knock cylinder 9 is a single-acting cylinder, it is necessary to have the communication hole 902 communicating with the outside, and when the diameter of the cylinder hole 904 is large, the position of the communication hole 902 can be set arbitrarily, but when the diameter of the cylinder hole 904 is small, not only is the size restriction in various aspects increased, but also the position of the communication hole 902 must be considered heavily because of the difficulty in pore processing. The communication hole 902 of the preferred embodiment is coaxial with the piston shaft 903, and has a diameter larger than that of the piston shaft for communicating with the outside, but smaller than that of the cylinder hole 904 for limiting the piston stroke. The communicating hole 902 which is coaxial with the piston shaft 903 not only ensures that when the hole is processed, the thinner drill bit can be replaced on the same machine only after the cylinder hole 904 is processed, thereby simplifying the processing technology; and the hole must be larger than the diameter of the piston shaft 903 so that it can be made larger than it would otherwise be, thereby reducing the difficulty of fine hole machining.

In order to simplify the above-described piping arrangement in which each of the knock-out cylinders 9 is connected to the on-off control device, in the present preferred embodiment, the cylinder holes 904 of all the knock-out cylinders 9 are opened in the same plate, which is the cylinder plate 502. The cylinder plate 502 is further provided with a communication chamber 503 connected to all the cylinder holes 904, and the communication chamber 503 is further connected to a connector 504 for connection to a switching control device.

In the above technical solution, usually, only after the pushing cylinder 9 pushes up the to-be-welded element, a separated pushing force is generated between the pressing plate 4 and the top plate 5, but some quick-release devices generating a pulling force, such as some latches, are locked by tightening, so that the pressing plate 4 and the top plate 5 which do not have a repulsive force are not easily and firmly locked, and the using effect is not good. In order to make the pulling force type quick detach device produce enough taut effect when the lock solid, the utility model discloses it is further, its roof 5 still includes riser 11. The vertical plate 11 is fixedly connected to the cylinder plate 502, and is disposed on an outer edge of an upper surface of the cylinder plate 502 (i.e., an upper surface of the cylinder plate 502, i.e., a surface of the cylinder plate 502 that is pushed and extended by the push cylinder 9) and the vertical plate 11 is fixedly connected to a quick release device connected to the pressure plate 4. Thus, the quick release device, especially the pull type quick release device, can lock and fasten the pressing plate 4 and the top plate 5 before the pushing cylinder 9 is pushed.

In the above technical solution, after the pushing cylinder 9 is pressurized, the flat plate 901 will be pushed up until the object is contacted or the stroke is finished. However, if the remaining flat plate 901 is pushed against the PCB 3 before the end of the stroke, except for the flat plate 901 that pushes against the component 2 to be welded, the PCB 3 is subjected to a large force and may be bent or broken. Therefore, the utility model discloses it is further, set up the maximum stroke height of dull and stereotyped 901 to be less than the position of PCB board 3. This allows some of the force originally applied to the PCB 3 to be borne by the cylinder plate 502, reducing the likelihood of the PCB 3 being pushed, bent or broken.

In the above solution, although the maximum stroke of the flat board 901 is not enough to reach the position of the PCB 3, it may still act on some protruding soldered components, thereby causing the PCB 3 to be stressed greatly. Therefore, the present invention further divides the vertical plate 11 into two parts, one part is the upper vertical plate 1101 connected to the quick release device, and the other part is the unchanged part. While the opposite variable portion, lower riser 1102, which may be made as a kit of parts having a range of heights, is connected to upper riser 1101 and cylinder plate 502 by removable connections (e.g., bolt screws, etc.) for use with different welded component heights.

In addition, in the above scheme, the friction force generated by the clamping pressure is used for preventing the PCB 3 from twisting on the pressing plate 4, but before the clamping force is generated, the PCB 3 can still twist, so that the problem of inaccurate positioning of the PCB can be caused, therefore, the positioning groove 403 is arranged on the pressing plate 4 in the preferred embodiment, and the positioning groove 403 can be customized according to each product and can also be made into a square with high universality.

In addition, since the components to be welded may be concentrated on one side of the PCB 3, the PCB 3 may be held in place by only a pushing force of one side after the entire turn, but if the other side is heavy, a sink collapse may occur. Therefore, in the preferred embodiment, the clamp plate 1 is provided between the clamp plate 4 and the top plate 5. The middle part of the clamping plate 1 is provided with an opening smaller than the periphery of the PCB 3, and the PCB 3 can be supported after being turned over, so that the phenomenon of collapse after being turned over is avoided.

Finally, the main material of the utility model can be aluminum alloy or plastic parts to reduce the whole weight and reduce the burden of operators during turnover; an automated turn-over device may also be provided to accomplish this.

Claims

1. The utility model provides a manual welding jig of PCB which characterized in that: the quick-release push-up mechanism comprises a press plate (4) and a top plate (5), wherein the press plate (4) and the top plate (5) are connected through a quick-release device, an operation opening (404) is formed in the middle of the press plate (4), a push-up cylinder (9) is arranged on the top plate (5), the push-up cylinder (9) comprises a flat plate (901) fixedly connected to the outer end of a piston rod (903), and the push-up cylinder (9) is connected with a switch control device.

2. The PCB manual welding fixture of claim 1, wherein: the switch control device comprises a voltage regulating device.

3. The PCB manual welding fixture of claim 1, wherein: the pushing cylinder (9) is a single-acting cylinder reset by external force.

4. The PCB manual welding fixture of claim 3, wherein: the number of the ejection cylinders (9) is more than 3, and the cylinder body axial point connecting lines (505) of every 3 adjacent ejection cylinders (9) form a regular triangle A; the cross section of the flat plate (901) is circular, and the diameter of the flat plate (901) is 0.9-1 time of the side length of the regular triangle A.

5. The PCB manual welding fixture of claim 4, wherein: the ejection cylinder (9) is provided with a communication hole (902), the communication hole (902) is coaxial with the piston rod (903), and the diameter of the communication hole (902) is larger than that of the piston rod (903).

6. The PCB manual welding fixture of claim 5, wherein: the top plate (5) comprises a cylinder body plate (502), cylinder holes (904) of all top pushing cylinders (9) are formed in the cylinder body plate (502), and the cylinder body plate (502) is further provided with a communication cavity (503) connected with all the cylinder holes (904); the cylinder plate (502) is connected with the pressure plate (4) through the quick release device.

7. The PCB manual welding fixture of claim 6, wherein: the top plate (5) further comprises a vertical plate (11), and the vertical plate (11) is fixedly connected to the outer edge of the upper surface of the cylinder plate (502); the vertical plate (11) is connected with the pressing plate (4) through the quick-release device.

8. The PCB manual welding fixture of claim 7, wherein: the flat plate (901) has a clearance with the PCB (3) to be processed when the piston (905) reaches the maximum stroke.

9. The PCB manual welding fixture of claim 8, wherein: the vertical plate (11) comprises an upper vertical plate (1101) and a lower vertical plate (1102), the upper vertical plate (1101) is connected with the pressing plate (4) through the quick-release device, and the lower vertical plate (1102) is detachably connected with the upper vertical plate (1101) and the cylinder plate (502) respectively.

10. The PCB manual welding fixture of claim 1, wherein: a clamping plate (1) is arranged between the pressing plate (4) and the top plate (5), and an opening is formed in the middle of the clamping plate (1).