CN105937016A - Automatic line for high temperature oil tin surface treatment - Google Patents

Abstract

The invention provides an automatic line for high-temperature oil-tin surface treatment, which includes a fixed bracket and a manipulator. A feeding device, a solder resist dipping device, a tin loading device, several water washing devices, an air-drying device and a feeding device are sequentially arranged along the moving direction of the manipulator. The tin device includes a T-shaped first cavity, the first cavity is divided into a lower tin tank and an upper high-temperature oil tank, and the two are connected. The soldering pad and the tin-leveled oil circuit nozzle on the hole wall, the oil circuit nozzle forms the oil circuit circulation through the water pump, adopts the hanging circuit board fixing method, and sprays high-temperature oil through the high-temperature oil tank set above the tin tank, using The high-temperature oil will level the via holes or through-holes of the circuit board and the tin on the pad to improve its flatness, thereby increasing the yield.

Description

High temperature oil tin surface treatment automatic line

technical field

The invention relates to a tin spraying machine used in the printed circuit board industry, in particular to an automatic line for high-temperature oil tin surface treatment.

Background technique

The basic production method of the current horizontal tin spraying machine is to send the circuit board to the top of the tin cylinder through the transmission result, and the tin liquid is led out by the tin guide tube, and flows through the circuit board, so that the copper foil of the circuit board and the tin liquid are in natural contact. Then the excess tin on the circuit board is blown away with high-temperature hot air by the blowing structure, leaving only a thin layer of tin surface, and then sent to the subsequent process for cleaning and drying. However, the blowing structure is currently used for blowing, because the blowing structure outputs The air in the air is dry, which will damage the flatness of the tin on the surface of the circuit board and the effect of tin coating. It is easy to show copper or tin unevenness, which may cause the circuit board to be embossed, solder joints and product defective rate. high.

Contents of the invention

In order to overcome the above technical deficiencies, the present invention provides an automatic line for high temperature oil tin surface treatment.

The invention provides an automatic line for high-temperature oil tin surface treatment, which includes a fixed bracket, a horizontal track is arranged on the upper end of the fixed bracket, and a manipulator for clamping a circuit board and capable of vertical lifting is set on the horizontal track, and the manipulator and The horizontal track constitutes a lateral sliding fit. Along the sliding direction of the horizontal track, a feeding device, a solder resist dipping device, a tin loading device, several water washing devices, an air drying device and a feeding device are arranged in sequence. The tin loading device includes a T-shaped device The first cavity is divided into a lower tin tank and an upper high-temperature oil tank, and the two are connected. The high-temperature oil tank is provided on both sides of the circuit board moving up and down for soldering the circuit board. The tin-leveled oil circuit nozzle on the plate and the hole wall, the oil circuit nozzle forms a high-pressure oil circuit circulation through the water pump.

The solder resist immersion device includes a second cavity, the inner wall of the second cavity is symmetrically provided with nozzles, the nozzles and the water pump form a circulation pipeline, and the top of the second cavity is symmetrically provided with a blowing structure.

The blowing structure is arranged obliquely.

The water washing device includes a third chamber, the inner wall of the third chamber is symmetrically provided with nozzles, and the nozzles and the water pump form a circulation pipeline.

There are two washing devices, the first washing device contains water or cleaning agent, and the second washing device contains clear water.

The air-drying device includes several symmetrically arranged blowing structures.

The air-drying devices are divided into two groups, the first group is a hot-air drying device, and the second group is a cold-air drying device.

The manipulator includes a fixed seat slidingly matched with the horizontal rail, and a longitudinal rail and a driving device are arranged on the fixed seat. A clamping device linked with it is provided at the bottom of the driving device, and both ends of the clamping device slide with the longitudinal rail. shift fit.

The clamping device includes a first splint and a second splint. A step is provided at the bottom of the first splint, and two positioning rods are arranged on the step to match the positioning holes of the circuit board. The top end of the second splint is connected to the first splint. The splint is hingedly arranged, the second splint is provided with a gap corresponding to the positioning rod, and a driving mechanism for driving the second splint to open is provided between the first splint and the second splint.

The driving mechanism includes a cylinder arranged on the back of the first splint, a bearing cooperating with the ejector rod of the cylinder, and a linkage fixedly arranged on the second splint. The linkage is press-fitted with the bearing, and the action of the cylinder drives The bearing pushes against the linkage to drive the second splint to open.

The beneficial effect of the invention is: adopt the hanging circuit board fixing method, and spray high-temperature oil through the high-temperature oil tank arranged above the tin tank, and use the high-temperature oil to level the tin on the circuit board via holes or through holes and pads, and improve Its flatness, thereby improving the yield.

Description of drawings

Figure 1 is a schematic plan view of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a structural schematic diagram of a device for dipping solder resist.

FIG. 4 is a schematic cross-sectional view of a device for dipping solder resist.

Fig. 5 is a structural schematic diagram of a tinning device.

Fig. 6 is a structural schematic diagram of a water washing device.

Fig. 7 is a schematic structural view of an air-drying device.

Fig. 8 is a partial view 1 of the manipulator.

FIG. 9 is an enlarged schematic diagram of A in FIG. 8 .

FIG. 10 is an enlarged schematic view of B in FIG. 8 .

FIG. 11 is an enlarged schematic diagram of point C in FIG. 8 .

Fig. 12 is a partial view 2 of the manipulator.

detailed description

Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

As shown in the figure, the present invention provides an automatic line for high-temperature oil tin surface treatment, which includes a fixed support 1, and a horizontal track is arranged on the upper end of the fixed support 1, and the horizontal track is set on the horizontal track for clamping the circuit board and can be vertically lifted The manipulator 2, the manipulator 2 forms a lateral sliding cooperation with the horizontal track, and the feeding device, solder resist dipping device 3, tinning device 4, several water washing devices 5, air drying device 6 and unloading device,

The device for dipping solder resist 3 includes a second cavity, the inner wall of the second cavity is symmetrically provided with nozzles 10, the nozzles 10 and the water pump 7 form a circulation pipeline, and the top of the second cavity is symmetrically provided with a blowing structure 9. The blowing structure is arranged laterally and obliquely, and the air outlet of the blowing structure is larger than the width of the circuit board to ensure full coverage of blowing. One kind of flux or two kinds of flux and degreasing agent are placed in the second cavity. The soldering flux or the degreasing agent is sprayed through the nozzle arranged on the inner wall of the second cavity, and the temperature of the fluxing or degreasing agent is 30±5 degrees Celsius, and the tinning effect is improved by deoxidizing the surface of the circuit board.

At the same time, the blowing structure is controlled by an air pump, and a humidifier is installed on the pipeline to ensure the humidity of the external air entering the blowing structure, so that the wind blown out by the blowing structure is humid, and can blow off the liquid medicine on the circuit board. It can ensure the wettability of the circuit board, so that it can be tinned better in the next process. In order to make the blowing structure blow off the excess liquid on the circuit board, it sets the blowing structure inclined downward, with an inclination of ≥50°.

The tinning device 4 includes a T-shaped first cavity, which is divided into a lower tin tank 14 and an upper high-temperature oil tank 13, and the two are connected. Since the density of oil and tin is different, It can be layered, and the temperature of the high-temperature oil and tin is 250 degrees Celsius, and the high-temperature oil tank 13 is provided with an oil nozzle 11 for flushing out the tin in the through hole of the circuit board on both sides of the circuit board moving up and down, The oil circuit nozzle 11 forms a high-pressure oil circuit circulation through the water pump 7, and a feed port 12 for convenient feeding is arranged above the oil circuit nozzle 11. When the circuit board moves vertically downward through the manipulator, it is first immersed in tin Then, when the manipulator moves vertically upwards, it will enter between the nozzles of the oil circuit, and through the impact of high-temperature hot oil, the tin in the through hole, through hole or perforation of the circuit board will be leveled. The tin attached to the pad is leveled, and because of the use of high-temperature hot oil, it will not cause impact on the surface of the tinned tin, that is, it will not affect the flatness of the tinned surface, and at the same time, the use of hot oil can directly The tin in the hole is leveled without damaging the tinning effect on the inner wall. At the same time, the first cavity adopts a T-shaped structure. The length of the high-temperature oil tank above is longer than the length of the tin tank, so the high-temperature hot oil can protect the tin liquid. , to prevent the oxidation of tin liquid, and secondly, an oil circuit circulation system is set in the high-temperature oil tank, which can make better use of high-temperature hot oil, make it multi-purpose, and save steps.

The water washing device 5 includes a third chamber, the inner wall of the third chamber is symmetrically provided with nozzles 10, the nozzle 10 and the water pump 7 form a circulation pipeline, and there are two water washing devices, and the first water washing device is clear water Or cleaning agent, clean water is installed in the second washing device, and the water pump drives the nozzle to achieve the flushing effect, and cleaning with cleaning agent can more effectively realize the shedding of impurities, and clean water in the last washing device to ensure its Therefore, multiple washing devices can be installed to realize the independence of cleaning and avoid water resource pollution of the cavity in the washing device.

The air-drying device 6 includes several symmetrically arranged blowing structures, the blowing structures are arranged vertically, and a plurality of blowing structures are arranged horizontally to realize a blowing structure array to ensure all-round blowing when the circuit board passes. The air-drying devices are divided into two groups, the first group is a hot-air drying device, and the second group is a cold-air drying device. A combination of cold air + hot air is used to ensure a better drying effect.

The manipulator 2 includes a fixed seat 15 slidingly matched with the horizontal track, the horizontal track can be any one of a guide rail, a slide rail or a guide bar, and the fixed seat 15 is provided with a longitudinal track 16 and a driving device, the longitudinal track 16 can be any one of a guide rod or a threaded rod, and the driving device is a motor or others. A clamping device linked with it is provided at the bottom of the driving device, and both ends of the clamping device are slidingly fitted with the longitudinal rails. That is to say, a plurality of guide wheels are arranged at the bottom of the fixed seat, and the guide wheels are concave, and the concave part is adapted to the horizontal track, and the guide wheels are inclined to reduce the force on the guide wheels, so that the fixed The seat is more stable when sliding, and it is not easy to shake, which reduces the swing degree of the circuit board during the moving process and improves the tinning effect.

The clamping device includes a first clamping plate 17 and a second clamping plate 18, and a step 19 is provided at the bottom of the first clamping plate 17, and the height of the step is adapted to the thickness of the circuit board, so as to ensure better clamping when clamping. To clamp the circuit board and ensure that it will not swing, two positioning rods 20 matching the positioning holes of the circuit board 21 are arranged on the step 19, and the top of the second splint 18 is hinged to the first splint 17 It is provided that the second splint 18 is provided with a notch 22 corresponding to the positioning rod, and a driving mechanism for driving the second splint to open is provided between the first splint 17 and the second splint 18 .

The drive mechanism includes a cylinder 23 arranged on the back of the first splint, a bearing 26 cooperating with the push rod of the cylinder, and a linkage 25 fixedly arranged on the second splint. The linkage is a square shape, and the bearing is set In the middle of the mouth shape, and the upper and lower sides are pressed, the two sides of the bearing are linked and cooperated with the ejector rod of the cylinder through the fixing part 24. When the ejector rod of the cylinder moves, the ejector rod drives the bearing to press the linkage part. Due to the second The upper side of the splint is hinged with the first splint, so under the force of the second splint, it will open, and directly fix the circuit board on the positioning rod through the positioning hole, and then pass the first splint and the second splint. Hold it fixed and drive it to slide along the horizontal track.

The embodiment should not be regarded as limiting the present invention, and any improvement based on the spirit of the present invention should be within the protection scope of the present invention.

Claims (10)

1. a high temperature oil tin surfaces processes transfer matic, it includes fixed support, it is characterized in that: described fixed support upper end horizontally set horizontal rail, the mechanical hand clamping wiring board and can longitudinally lifting it is provided in described horizontal rail, described mechanical hand constitutes horizontal sliding with horizontal rail and coordinates, feeding device is set gradually along horizontal rail glide direction, leaching solder resist device, upper stannum device, if arterial highway water washing device, air-dry apparatus and blanking device, described upper stannum device includes the first cavity volume of T-shaped setting, described first cavity volume is divided into molten tin bath and the high temperature oil groove of top of lower section, and it is the most through, the both sides of described high temperature oil groove lower movement in the circuit board are provided for the oil circuit shower nozzle flattened by the stannum on the pad of wiring board and hole wall, described oil circuit shower nozzle forms high-pressure oil passage by water pump and circulates.

High temperature oil tin surfaces the most according to claim 1 processes transfer matic, it is characterized in that: described leaching solder resist device includes the second cavity volume, described second cavity volume inwall is symmetrical arranged shower nozzle, and described shower nozzle constitutes circulating line with water pump, and the top of described second cavity volume is symmetrical arranged blow structure.

High temperature oil tin surfaces the most according to claim 2 processes transfer matic, it is characterised in that: described blow structure is obliquely installed.

High temperature oil tin surfaces the most according to claim 1 processes transfer matic, it is characterised in that: described water washing device includes that the 3rd cavity volume, described 3rd cavity volume inwall are symmetrical arranged shower nozzle, and described shower nozzle constitutes circulating line with water pump.

High temperature oil tin surfaces the most according to claim 4 processes transfer matic, it is characterised in that: described water washing device is 2, is clear water or abluent, sets clear water in second water washing device in first water washing device.

High temperature oil tin surfaces the most according to claim 1 processes transfer matic, it is characterised in that: described air-dry apparatus includes some symmetrically arranged blow structures.

High temperature oil tin surfaces the most according to claim 6 processes transfer matic, it is characterised in that: described air-dry apparatus is two groups, and first group is hot blast air-dry apparatus, and second group is cold wind air-dry apparatus.

High temperature oil tin surfaces the most according to claim 1 processes transfer matic, it is characterized in that: described mechanical hand includes the fixing seat coordinated with horizontal rail sliding, on described fixing seat, long rails and driving means are set, arranging the clamping device linked with it bottom described driving means, described clamping device two ends coordinate with long rails sliding.

High temperature oil tin surfaces the most according to claim 1 processes transfer matic, it is characterized in that: described clamping device includes the first clamping plate and the second clamping plate, bottom described first clamping plate, step is set, described step arranges two location bars suitable with hole, wiring board location, described second clamping plate top and the first hinged setting of clamping plate, at described second clamping plate correspondence location bar, gap is set, is provided with between described first clamping plate and the second clamping plate and orders about the drive mechanism that the second clamping plate are opened.

High temperature oil tin surfaces the most according to claim 9 processes transfer matic, it is characterized in that: described drive mechanism includes being arranged on the cylinder at the first clamping plate back, the bearing that is linked with the push rod of cylinder and be fixedly installed on the STATEMENT OF FEDERALLY SPONSORED on the second clamping plate, described STATEMENT OF FEDERALLY SPONSORED and the press-fit of bearing top, described cylinder action band dynamic bearing top pressure STATEMENT OF FEDERALLY SPONSORED, drives the second clamping plate to open.