JPH0242913B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is for partially plating various types of workpieces connected in series at high speed, for example, continuous press processing into strips. When plating minute parts of precious metals, etc. onto a large number of connector terminals, the high-speed movement of the workpiece, reliable power supply, and accurate positioning are linked and controlled.
This invention relates to a high-speed plating method and device that maintains a high degree of efficiency and quality.

(Prior Art) Generally, electronic devices are required to be smaller and lighter, and accordingly, it is essential that each component used inside the device be made smaller and more densely packaged.

For example, connectors used to connect multiple printed circuit boards or electronic devices have a certain distance between their poles.
Moving from 2.54mm pitch to even smaller pitch,
The terminals disposed inside have a smaller size, and their conductive parts are plated with a noble metal such as gold to reduce contact resistance.

However, since the material cost of precious metal plating is quite high, partial plating is usually performed only on the necessary parts.

In addition, the terminals are processed using a phosphor bronze strip plate or the like using a progressive press at high speed, and a pilot hole 1 is drilled in a part of the strip material as shown in Fig. 1. A carrier 2 is formed on which a terminal 3 is formed leaving a partial connecting portion 4, and a notch 5 is formed in the connecting portion 4.
It is formed into a shape that can be easily folded from there, and in this state it is wound up into a coil.

When assembling the connector, the terminals 3 broken off from the notches 5 are fed into a plastic molded housing (not shown) by an automatic machine.

Therefore, when partially plating a part of the terminal 3 as described above, the terminal 3 is connected to the carrier 2, and the coil is pulled straight, and the predetermined part to be plated is transferred to the plating device. However, after partially plating the area, it must be wound into a coil again.

Below, a specific example of this kind of partial plating method that has been practiced in the past will be explained based on FIG. 2 and subsequent figures. Note that the object to be plated, such as a terminal, will be referred to as a workpiece W hereinafter.

The entire process consists of a feeding reel 7 on which the pressed coil 6 is hung and fed out as described above;
a power supply unit 8 that contacts the workpiece W and supplies power thereto; a pretreatment and base plating stage 9 that performs a pretreatment for plating the workpiece W and performs base plating;
a partial plating processing stage 10 for partially plating precious metals such as gold on predetermined parts of the plated part, a plating post-processing stage 11 for post-processing after the partial plating, a drive unit 12 for holding and pulling the workpiece W, and a coil for the plated workpiece W. It is composed of a take-up reel 13 that winds up the winder into a shape.

To explain each stage in detail, first, the workpiece W fed out from the feeding reel 7 is wound up on the winding reel 13 at the end via the roller 14, and during that time, it is passed over a predetermined length. The workpiece W is placed in a horizontally stretched state, and various processes are performed therebetween.

The next power feeding unit 8 maintains the horizontality of the workpiece W by arranging a workpiece guide 15 as shown in FIG. At the same time, the shaft is rotated so that a predetermined voltage and current can be applied to the workpiece W through the metal power supply rollers 8a and 8b while in line contact with the workpiece W.

The next pre-treatment and base plating stage 9 has a degreasing liquid tank 16, a water tank 17, a strong acid liquid tank 18 such as hydrochloric acid, and the work guide 15 installed in series in the previous stage, and the work W is in a horizontal state. While being held in water, they are sequentially immersed in each tank, and are subjected to preliminary treatments of degreasing, washing with water, and pickling.

Also, in the latter stage, the power supply section 8 and the work guide 1
5. A nickel plating liquid tank 19 and a cleaning liquid tank 20 are installed in series to perform nickel plating processing, which is base plating, and subsequent processing.

Next, in the partial plating stage 10, the terminal 3 is partially plated with a noble metal such as gold. Generally, the part to be plated is used as a cathode, and the plating liquid is directed toward the part from a nozzle serving as an anode. A plating processing device 21 for ejecting, a work guide 15, and a power supply section 8 are arranged in series.

Furthermore, in the plating post-processing stage 11, a water washing processing section 2
2 and a drying section 23 are provided for finishing plating.

Then, the next-stage drive unit 12 holds the workpiece W between a pair of large rollers 24 and 25, and rotates the workpiece W by rotating the shafts of the large rollers 24 and 25.
At the same time, a certain tension is applied to the work W located at each stage of the plating line while the work W is transferred, and the work W is coiled again by the take-up reel 13 at the final stage. Wind it up.

When performing continuous plating processing in this way, the rollers at each stage must be designed so as not to directly pinch and deform the part to be plated. For example, in the case of the terminal 3 shown in Fig. 1, the rollers should pinch the carrier 2 and transport it. I try to do that.

(Problems to be Solved by the Invention) However, in the case of continuous plating processing using the above-mentioned conventional means, there are the following problems.

First, during continuous plating, the workpiece W is horizontally fed and is easily loosened, making it difficult to accurately position the workpiece and making it impossible to perform precise plating.

In particular, if slack occurs in the degreasing or plating solution tank, the electrolytic degreasing or base plating will become uneven in the electrolytic degreasing or base plating process, making high-quality plating impossible.

Furthermore, if a long workpiece is slack, a large amount of processing liquid from each process will adhere to it and be carried out of the tank, often diluting or neutralizing the liquid in the adjacent tank, which will reduce the yield of the plating process. It was bad.

In addition, since the continuous plating device has a large number of processing stages, rollers, work guides, etc. installed in series as described above, the total length is several tens of meters, and the inevitable workpiece W is also fed out to that length. It is quite difficult to hold the entire length horizontally and taut.

In particular, coil material is prone to curling, waviness, twisting, loosening, etc., and this condition becomes more pronounced as the length of the workpiece is extended.
When transported at high speed, vertical twisting, horizontal wobbling, and slipping become significant, and the positioning accuracy of each stage is significantly reduced.

For example, as shown in FIG. 4, the conventional work guide 15 includes a guide roller 15a in which a guide groove corresponding to the width of the work W is formed, and a guide roller 15a disposed on the guide roller 15a, and a predetermined elastic force applied by a spring 15b. It is composed of an energized pressing roller 15c, and the workpiece W passing through the guide roller 15a is
The top is pressed down by a pressing roller 15c.

However, as mentioned above, depending on the state of the workpiece W, it is easy to come off from the workpiece guide 15, and it is difficult to reliably regulate the degree of freedom in the vertical direction in particular. There was also the problem that it took a lot of setup time when changing the work W or the process.

In addition, as mentioned above, when partial plating using precious metals such as gold as a base material is performed in a very short time and in large quantities, the plating must be performed on a predetermined portion of the part to be plated in a very small area. Since accurate positioning is essential, it is difficult to process precision partial plating at high speed using conventional methods.

However, accidents may occur in which the workpiece W loosens due to its own weight and comes into contact with the surface of a device or the like, damaging the workpiece W.

Of course, it is possible to maintain the flatness of the workpiece W to some extent by arranging a large number of workpiece guides and rollers in parallel, but this inevitably increases the contact and frictional resistance between the workpiece W and these. On the contrary, work W
There are problems such as damage to the equipment, an increase in the driving force of the equipment, an increase in the size of the equipment as a whole, and other troubles.

Furthermore, when feeding power, a metal power feeding roller 8 is used.
Since a, 8b and the work W are energized in a line contact state, the contact resistance is high and the amount of Joule heat generated cannot be ignored. In particular, the larger the plating current is, the higher the heat becomes, and the dust in the air, oils and fats in the processing liquid, base substances, etc. adhering to the surfaces of the metal power supply rollers 8a and 8b and the surface of the workpiece W are carbonized and insulated. This tends to cause troubles such as the formation of a hard coating, which further increases the contact resistance, and the surfaces of the metal power supply rollers 8a, 8b and the workpiece W becoming rough.

In addition, the metal power supply rollers 8a and 8b must be prepared in advance because the holding force and amount of current will not be stable unless special ones are used depending on the shape and dimensions of the workpiece W. Moreover, the number of man-hours required for replacement and installation was also a major burden.

Furthermore, when pulling the workpiece W, the pulling force is generated only by the frictional force of the large rollers 24 and 25 that are in contact with the workpiece W as described above.
If the load increases even slightly, slips will inevitably occur, so it is extremely difficult to transport a large workpiece W at high speed with one machine.

Furthermore, when performing continuous plating processing at high speed, coiled workpieces W must be replenished one after another, and when exchanging old and new coils, it is necessary to connect the ends of each coil. It was inefficient because it either stopped or slowed down the processing speed.

Furthermore, while the pretreatment and base plating stages are continuous processing steps, the subsequent partial plating stage is an intermittent step, and it is important to maintain the timing between them.

For this reason, a monitoring worker had to control the throughput of the entire process in order to provide a certain amount of slack in the workpiece W between both processes and to maintain this at a certain amount, resulting in a burden on personnel and a decrease in work efficiency. etc. were unavoidable.

[Structure of the Invention] (Means for Solving the Problems) This invention was made in view of the above-mentioned problems, and it is possible to twist a workpiece that has been fed horizontally by 90 degrees to bring it to a vertical position. The workpiece is then sandwiched horizontally and left and right, and power is supplied in surface contact, and the horizontal and vertical degrees of freedom of the workpiece are controlled by at least three upright rollers for accurate positioning. In addition, pre-treatment and base plating treatment,
Partial plating of precious metals, etc. is applied to predetermined areas of the base-plated workpiece, and the workpiece is transferred and driven by being held and pulled by a pair of endless belts made of a soft elastic material, and finally, the workpiece is transferred by 90° again. The structure is such that it can be returned to a horizontal position.

(Function) By horizontally transporting the workpiece in a vertical state, it becomes easy to tension the workpiece over a long distance and transport it at high speed, and since the processing liquid also tends to fall, the amount of liquid adhering to the workpiece is reduced.

In addition, since power is supplied while in surface contact with the workpiece, the amount of heat generated due to the reduction in contact resistance is greatly suppressed, and it is therefore possible to pass a larger current, which improves plating processing efficiency. Quality stabilization can be improved.

Furthermore, as a result of restricting the degrees of freedom of the continuously transferred workpiece in each of the horizontal and vertical directions, the positioning of the workpiece becomes accurate, and in particular, the accuracy of partial plating processing can be significantly improved.

Furthermore, since the workpiece is held between soft elastic bodies,
The workpiece can be protected, reliably held, and strong tensile force can be obtained, and the workpiece can be transferred stably.

(Embodiment) Next, an embodiment of the present invention will be described based on FIG. A twisting roller 32 that twists and transfers, a power supply device 3 that rubs against the workpiece W and applies a predetermined DC voltage and current to it.
3. A guide roller 34 that regulates the position of the workpiece W being transferred; a pre-treatment and base plating device 35 that applies a base plating of nickel or the like to the workpiece W; a part of the workpiece W to be plated is partially plated with a precious metal such as gold; A partial plating device 36, a post-processing device 37 that performs post-processing after plating, a work drive device 38 that holds the work W and drives it in tension, a restoration roller 39 that returns the work W to its original horizontal state, and a work W
A coiler 40 is installed in series to wind up the coil.

Each stage will be explained in detail below.

First, the workpiece W according to this embodiment is a connector terminal shown in FIG.
It is pressed with a large number of terminals 3 arranged in series, and is wound into a coil as it is.

This coiled workpiece W is hung on an uncoiler 31 having a well-known reel structure, and the uncoiler 31 is rotated at an arbitrary rotational speed to sequentially feed out the workpieces W in a horizontal state. The next stage twisting roller 32 is the sixth
As shown in the figure, a horizontal roller 4 rotating on a horizontal axis
1 and a vertical roller 42 that rotates on a vertical axis are placed adjacent to each other so that they face each other at an angle of 90°, and the horizontal workpiece W is twisted 90° to make it vertical. send

By vertically transporting the material in this way, curling can easily control conditions that are disadvantageous to plating, such as undulations,
In addition, it prevents the phenomenon of loosening during tensioning and enables high-speed transfer.

Next, in the power supply state 33 shown in FIG. 7, the workpiece W, which has been fed vertically on the stage, is pressed and held from the horizontal left and right directions by a pair of sliders 43, 43', and at the same time, a predetermined It applies DC voltage.

That is, one slider 43 is fixed on the stage, and the movable slider 43' is arranged opposite to it, and both sliders 43, 4
3' is formed into a flat shape, so that when the two are in close contact with each other, they are in complete surface contact with the carrier 2 of the workpiece W. The material is preferably the same as that of the workpiece W or a wear-resistant metal such as stainless steel.

Further, a plurality of slide pins 44 are horizontally protruded from the movable slider 43', the other end of which passes through a frame 45 on the stage, and a coil spring 46 is mounted between the movable slider 43 and the frame 45. Due to the resilient force, the movable slider 43' is constantly urged to press against the fixed slider 43.

Of course, the fixed slider 43 may also have the same configuration as the movable slider 43, and both may be pressed against each other by the elastic force of the coil spring.

The terminal end of the slide pin 44 is connected to one pole of a DC power source.

With this configuration, the workpiece W is constantly rubbed between the sliders 43 and 43' under a constant holding force, and power is supplied in a state of surface contact, so the contact resistance is extremely low. Heat generation is suppressed, and a larger current can be passed accordingly. Therefore, since the plating current can be made to have a high current density, the plating efficiency and the plating quality can be greatly improved.

In addition, since the holding force of the workpiece W is high, the power supply device 3
When a plurality of carriers 3 are installed in series (disposed before the base plating device 35 and after the partial plating device 36), the workpiece W between them will be in a tension state with a predetermined tension, and even if only the carrier 2 is held and transferred. No slip phenomenon occurs at all.

By the way, in the case of the conventional roller power supply method mentioned above, the contact state is in a line shape, so it is easy to slip, and the supplied power cannot be increased sufficiently, so the plating processing time has to be lengthened (normally, the plating liquid tank is long). As a result, the overall length of the apparatus inevitably increases and the working efficiency decreases. Furthermore, in the case of line contact, if the workpiece W is energized and transferred at high speed, the power supply surface of the roller becomes rough and the surface of the workpiece W is often damaged.

In addition, in the case of this embodiment, since the workpiece W is constantly wiped at a constant pressure, foreign substances such as oil and fats and dust adhering to the surface, as well as substances such as base substances and oxide films that have an adverse effect on the plating process, are removed. Because it can be forcibly removed mechanically, and because the holding force and power feeding area are small in the conventional roller power feeding system, the outer diameter and placement position have to be changed for each type of workpiece, but in the case of this example, it is sufficient. Since the holding force and power feeding area can be ensured, there is also the advantage that a single slider 43, 43' can handle various types of workpieces W.

Furthermore, since the holding force of the workpiece W is strong, the workpiece W is in a tensioned state between it and the workpiece drive device 38, which will be described later, and troubles such as the workpiece itself becoming loose and coming into contact with other parts and being damaged can be prevented, and positioning can be performed accurately. .

Next, in the case of this embodiment, the guide rollers 34 shown in FIG. It may be placed in The guide roller 34 is necessary because when the workpiece W, that is, the terminal 3, is press-formed, press-processing stress strain always remains, so when a long hoop-shaped workpiece W is pulled out for a long time, screws and This is installed to prevent deformation such as undulation, which makes accurate positioning of the workpiece W difficult.

The guide roller 34 consists of a set of three rollers 47A, 47B, 47, each of which is erected so as to be freely rotatable.
C, each roller 47A, 47
The rotational axes of rollers B and 47C are located at each vertex of a regular triangle or isosceles triangle on a horizontal plane, and the outer circumferential surfaces of rollers 47A, 47B, and 47C are very close to each other.

The workpiece W passes through the gap between two adjacent rollers 47A, 47C located at the base of the triangle and another roller 47B located at the apex while contacting each roller 47A, 47B, 47C. , thereby restricting the degree of freedom of the workpiece W in the horizontal and lateral directions.

Also, each roller 47A, 47B, 47C,
The rotation axis is inclined inward by a desired angle (inverted V-shape when viewed from the side), and each roller 47A, 47B, 47C is rotated from above the workpiece W that is being fed horizontally in a vertical state. All three rollers are in a state of being covered, and when the moving workpiece W floats up in the vertical direction, the upper edge of each roller 47A,
It can contact the outer peripheral surfaces of 47B and 47C and prevent them from rising any further. As another means for regulating the degree of freedom of the workpiece W in the vertical direction, for example, as shown in FIG. It may also be installed vertically at the same position as. In this case as well, the upper edge of the workpiece W is prevented from floating upward by the tapered surfaces of the rollers 48A, 48B, and 48C, and can also be restricted in the horizontal and left-right directions.

In either case, regardless of the size and shape of the workpiece W, the degree of freedom in the horizontal direction can be reliably controlled by the three-point support by each roller, and the degree of freedom in the vertical direction can be reliably controlled by the workpiece clamping angle of each roller. Therefore, stable workpiece transfer is possible, and a single guide roller 34 is required for various types of workpieces W, making it versatile.

The next pre-processing and base plating device 35 is the same as the conventional one described above, so its explanation will be omitted, but in the case of this embodiment, the workpiece W is fed progressively at high speed in a tensioned state and in a vertical state. During the degreasing, pickling, and water washing processes, troubles such as the respective liquid agents adhering to the work W and being carried out of the tank, and thereby diluting or neutralizing the liquid concentration in the next tank can be prevented.

The next partial plating device 36 is related to the invention of Patent No. 1261266, and as shown in FIG. A mantle tube 50 that forms a sealed space together with dust, an intake mechanism 52 that communicates with an exhaust pipe 51 provided in the mantle tube 50, and an air intake mechanism 52 that is arranged inside the mantle tube 50 and connected to the + pole of a DC power source. A nozzle 53 for spraying plating liquid is a basic component.

In addition, when partially plating the workpiece W at this stage, the workpiece W is first transferred to the upper surface of the mask 49 and then stopped, and the area to be plated is set by masking. A negative pressure state is maintained, and under this state, the plating liquid is injected from the nozzle 53 onto the area to be plated, thereby performing a minute partial plating process on the specific area.

Although the details of this partial plating processing means are disclosed in the above-mentioned known invention, the explanation will be omitted, but the movement of the workpiece W in this stage is intermittent. However, since the partial plating process is completed in a very short time due to the use of negative pressure, it is easy to adjust the overall line balance, and this point will be covered more completely in the examples described below. ing.

Further, since the next-stage post-processing device 37 is the same as that of the conventional example, a description thereof will also be omitted.

Next, the workpiece drive device 38 will be explained with reference to FIG. 11 and subsequent figures.

The workpiece drive device 38 serves as a driving force source that continuously pulls and transports the workpiece W held under pressure by the power supply device 33 at a predetermined speed.

That is, on the stage of this stage, a pair of endless timing belts 54A, 5 are installed so that the workpiece W transferred in a vertical state can be clamped from the horizontal left and right directions.
4B are arranged, each timing belt 5
4A and 54B are wound around the driving gear 5 and the driven gear 56 and automatically rotate in the same direction.

The timing belts 54A, 54B have a multi-layer structure, and the inner layer is a gear belt 57 made of hard rubber and formed into an endless belt shape, and is able to mesh with the driving gear 55 and the driven gear 56 and rotate freely.

The outer layer is a sponge belt 58 made of a soft elastic material such as synthetic rubber sponge and formed into an endless belt shape, and is firmly attached to the outer periphery of the gear belt 57 so as to rotate together with it. .

Further, inside the timing belts 54A, 54B, that is, inside both belt gears 57, a plurality of push plates 59A, 59B each having a flat surface are arranged in a swingable state in parallel, and each push plate is arranged on both sides of the push plates 59A, 59B. The push plates 59A and 59B are pushed against each other while facing each other.

Note that the timing belts 54A, 54B are constantly pressed inward by rollers 60 disposed on the outside thereof, so that the tension of the timing belts 54A, 54B is maintained at an appropriate level. be.

When transferring the workpiece W from left to right in the figure, the upper timing belt 54A rotates counterclockwise, and the lower timing belt 54B rotates clockwise to grip the workpiece W.

At this time, the outer soft sponge belt 54
A, 54B presses the workpiece W from the left and right so as to wrap around the entire workpiece, but since the sponge portion gets stuck in the uneven parts of the workpiece, the tensile force becomes great, resulting in a slip condition. There is no such thing.

Furthermore, since the pressing force on the workpiece W is evenly distributed through the soft sponge, deformation and damage can be reliably prevented.

As a result, even if the workpiece W is clamped by the power supply device 33 in surface contact, the tensile force of the workpiece driving device 38 is stronger, so that it is possible to reliably transport the workpiece at high speed while protecting it.

In addition, regardless of the shape or size of the work W,
Since the workpiece W is held in a manner that wraps the entire workpiece W, a single workpiece driving device 38 can process a wide variety of workpieces.

The workpiece W transferred as described above is returned from its vertical state to a horizontal state by the restoring roller 39 at the next stage.

This restoration roller 39 is the twisting roller 3
The same rollers as in 2 are connected in reverse order, and the vertical workpiece W is twisted 90 degrees to its original position so that it becomes horizontal and is sequentially conveyed to the next stage.
The workpiece W returned to the horizontal position in this manner is wound up by a coiler 40, which is a well-known rotary reel.

The restoring roller 39 may be installed before the partial plating device 36 to the post-processing device 37, and partial plating may be performed while the workpiece W is in a horizontal state.

Next, a second embodiment shown in FIG. 12 and subsequent figures will be described. This embodiment is basically the same as the first embodiment, but as mentioned above, this type of workpiece W requires a large amount of processing and must be processed continuously at high speed for a long period of time. No.

Particularly in the case of high-speed plating, plating quality will deteriorate unless the process is performed at a constant speed, but since there are limits to the weight and length of each coil, it is difficult to perform plating continuously. Conventionally, when the supply of the work W approaches the end, the operator stops the line each time, removes the empty reel of the uncoiler 31, sets the next coil, and then inserts the end of the work W of the previous coil into the work W of the new coil. Since the wire was connected to the starting end of the pipe, it was difficult to avoid a decline in work efficiency and quality. Particularly in high-speed plating processing, the frequency of coil replacement was quite high.

In this embodiment, as a countermeasure against this, the coiler 31
A slack tower 61 is installed at the next stage of the uncoiler and at the front stage of the uncoiler 40, and the portion of the entire length of the line that is wound by the slack tower 61 acts as a damper, thereby ensuring the connection time of the coil and plating with stable quality. is made so that it can be maintained.

That is, the slack tower 61 has a fixed roller 62 which can freely rotate on its axis, and a stage on which the workpiece W is transferred in a horizontal traverse state as shown in FIG.
A pair of movable rollers 63A and 63B are arranged above and below the fixed roller 62 (an axis perpendicular to the line direction of the workpiece W), which rotate at a predetermined distance l apart from each other and are vertically movable up and down. The pair of movable rollers 63A and 63B can move toward and away from the fixed roller 62 in conjunction with each other from above and below.

The work W is being fed horizontally and is wound around the fixed roller 62 from the left side in the figure, then around the upper movable roller 63A, then around the lower movable roller 63B, and then again around the fixed roller. 6
2 to the right in the figure. (See the arrows in the figure) Normally, the upper and lower movable rollers 63A and 63B rotate on their respective axes at positions apart from each other. Under tension, the upper and lower movable rollers 63A, 63B approach each other toward the fixed roller 62. For the workpiece W in this stage, if the distance between the movable rollers 63A and 63B in the closest state is l', the difference from the distance l in the separated state, l-l', is secured as an extra length.

Therefore, even if the uncoiler 31 stops, this extra length or the next stage twisting roller 32 and power supply device 33
During this time, by setting the next coil in the uncoiler 31 and connecting it to the end of the remaining previous coil, it is possible to continuously supply the work W without stopping the plating process line. be.

Of course, this extra length is the movable roller 63A, 63B.
Since it can be set by the arrangement interval and the outer diameter of each roller including the fixed roller 62, it can be determined by taking into consideration the connection work time of the work W.

Further, by disposing this slack tower 61 also in front of the coiler 40 at the final stage, the entire line balance can be kept constant.

Next, the third embodiment shown in FIG. 14 has the same basic configuration as the first embodiment, but it automatically detects and corrects line balance disturbances that require the most attention especially in the continuous plating process. It was designed to do so.

For example, as described above, the workpiece W is continuously transferred to the pretreatment and base plating device 35, but the workpiece W is transferred intermittently to the next stage partial plating device 36, so that Since the line balance is easily lost, the workpiece W is always provided with slack S before and after the partial plating device 36.

However, in high-speed plating processing, the slack S, that is, the extra length changes quickly, making stable processing difficult.

As a countermeasure against this, in this embodiment, a slack detection device 64 for detecting the slack S of the workpiece W is provided before and after the partial plating device 36. The slack detection device 6
4, as shown in FIG. 15, the workpiece W is loosened by a predetermined length in advance, and a V-shaped guide pole 65 is arranged to sandwich this slackened portion S, and a laser, light emitting diode, etc. A photoelectric position sensor 66 is installed to detect the amount of slack, and the output of this position sensor 66 is sent to the rotation speed control section of the work drive device 38 and the plating current control section of the partial plating device 36. , uncoiler 3
1, coiler 40 or the slack tower 61
It is used as a sequence control input signal for a workpiece transfer timing control unit, etc.

By doing this, the state of the slack S in the guide pole 65 can be detected at all times, so for example, when the workpiece W in the guide pole 65 becomes slack S, that is, the remaining length is reduced, the timing of the partial plating device 37 is Decrease the speed or use the base plating device 3.
Measures such as increasing the plating current No. 5 to speed up the plating processing speed or suppressing the speed of the workpiece drive device 38 can be performed completely automatically.

By the way, in the past, the transfer speed of the entire workpiece W was controlled by the rotation speed of the pinch roller, so if there were problems with partial line balance, it was necessary to rely on human troubleshooting by line monitoring workers. However, especially in the case of high-speed processing, this could not be done, and even led to damage to the workpiece W. However, in this embodiment, it is possible to solve these problems.

In addition, as another embodiment, the partial plating device 36 for precision partial plating using the negative pressure and the partial plating device 36' for general injection plating may be installed side by side, so that the partial plating device 36 for precision partial plating using negative pressure may be installed in parallel to suit the type of workpiece or object to be plated. There are some that can be used depending on the situation.

In this case, the overall basic configuration may be the same as the previous embodiments, but as shown in FIG. 16, the guide roller 34 in FIG. The partial plating device 36 and the general partial plating device 36' are arranged in parallel in a stage,
Furthermore, a separate second guide roller 34 is disposed at the next stage, and a twisting roller 32 and a restoring roller 39 are disposed at the front and rear stages of each plating device, respectively.

With this configuration, any partial plating can be selected by simply changing the workpiece W to either one.

(Effects of the Invention) As explained above, according to the present invention, a workpiece in the form of a long strip wound in a coil is twisted from horizontal to vertical and progressively fed, and the workpiece is moved by a pair of conductive sliders. The processing position is accurately set by supplying a predetermined power while holding the workpiece from the left and right sides, and regulating the degrees of freedom of the progressively fed workpiece in the horizontal left-right direction and vertical upward direction. A pair of timing belts formed in an annular shape grip the workpiece and drive it in tension, and under this condition, the workpiece being transferred at high speed is subjected to base plating and partial plating to the area to be plated. It has the following characteristics.

In the case of workpieces such as connector terminals, it is necessary to control disadvantageous conditions for high-speed continuous plating processing such as curling, waviness, or meandering of the raw material strip, and to easily handle the diversity of shapes and dimensions of the workpiece. It can be handled by a unified system and has high versatility.

The vertical and horizontal positional deviations of progressively transported workpieces are constantly regulated, and accurate positioning at the partial plating processing station is performed, enabling high-speed processing of precision partial plating.

When holding or transporting long strip-shaped workpieces,
There are no speed ratio changes such as slips or unstable running, speed stabilization is quick at the time of startup, and it is possible to securely hold the workpiece, transfer it continuously at high speed, and maintain the straightness of the workpiece. This makes it more reliable.

It is possible to supply a predetermined amount of power to workpieces that are continuously transported at high speed while in contact, suppressing electrical troubles such as joule heat, and maintaining a high current density of plating current, greatly reducing plating time and plating processing efficiency. This can significantly improve the quality of matsuki.

During the above power supply, the power-supplied surface of the workpiece is constantly wiped, which removes adhesion of foreign substances, oxides, bases, etc. that are disadvantageous during the plating process, making it possible to obtain a higher plating current density. Become.

Since the entire workpiece is tensioned with a predetermined tension while being continuously transferred at high speed, it is possible to prevent the workpiece from becoming loose due to its own weight and coming into contact with other parts of the apparatus and damaging the workpiece.

Even if the workpiece shape is easily deformed,
When holding and pulling the workpiece, the holding force is distributed over the entire workpiece via the soft elastic body, and the soft elastic material bites into the irregularities of the workpiece to prevent accidents such as deformation and damage to the workpiece. There are no.

When replacing a reel with a coiled workpiece wound with a new one, the ends of the old and new coils can be connected under continuous constant speed operation without reducing or stopping the running speed of the line, allowing a stable workpiece. supply is possible.

The amount of slack that occurs at the connection between intermittent partial plating and continuous base plating is automatically detected, and the plating processing time and workpiece transfer speed are automatically corrected based on the detection signal, so the overall line balance can be maintained. Can be held accurately.

Since the workpiece is transported vertically and horizontally, the workpiece has a strong straightness, and it is possible to suppress the processing liquid at each stage from being carried out of the tank and the processing liquid from being diluted.

Furthermore, as described above, since there is almost no slack in the workpiece, the workpiece transfer speed can be extremely high.

[Brief explanation of the drawing]

Figure 1 is an explanatory perspective view of a workpiece, Figure 2 is an explanatory diagram of a system related to conventional continuous plating processing means, and Figure 3 is an explanatory diagram of a system related to a conventional continuous plating processing means.
The figure is a perspective view of the power supply unit in the system, and FIG. 4 is a perspective view of the work guide. Figure 5 and subsequent figures relate to embodiments of the present invention, in which Figure 5 is an explanatory diagram of a high-speed continuous plating processing system according to the first embodiment, and Figure 6 is a perspective view of a twisting roller in the same system. , FIG. 7 is a plan view of the power supply device in the above system, FIG. 8 is a perspective view of the roller guide in the above system, FIG. 9 is a perspective view showing another embodiment of the above roller guide, and FIG. 10 is a perspective view of the roller guide in the above system. It is a sectional explanatory view of a partial plating device in the same system as above, and is a first
Figure 1 is a plan view of the work drive device in the above system, Figure 12 is an explanatory diagram of the high-speed continuous plating processing system according to the second embodiment, Figure 13A is a front explanatory diagram of the slack tower in the same system, and Figure 13 Figure B is an explanatory front view showing the operating state of the slack tower in the same system as above; Figure 14 is an explanatory diagram of the high-speed continuous plating processing system according to the third embodiment;
This figure is a front explanatory view of the slack detection device in the system, and FIG. 16 is a diagram of a plating processing system including a plurality of partial plating processing means according to a fourth embodiment. W...work, 2...carrier, 3...terminal,
31... Uncoiler, 32... Twisting roller,
33...Power supply device, 34...Roller guide, 3
5... Pre-treatment and base plating processing device, 36...
Partial plating processing device, 37...Post-processing device, 38
... Work drive device, 39 ... Restoration roller, 4
0...Coiler, 41...Horizontal roller, 42...
...Vertical roller, 43...Movable side slider, 4
3'... Fixed side slider, 44... Slide pin, 45... Frame, 46... Coil spring, 47A, 47B, 47C... Roller, 48
A, 48B, 48C...roller, 49...mask, 50...mantle tube, 51...exhaust pipe, 52...
Intake mechanism, 53... Nozzle, 54A, 54B...
Timing belt, 55... Drive gear, 56...
Driven gear, 57... Gear belt, 58... Sponge belt, 59A, 59B... Push plate, 60...
Roller, 61... Slack tower, 62... Fixed roller, 63A, 63B... Movable roller,
S... Loose portion, 64... Looseness detection device, 65...
...Guide pole, 66...Sensor.

Claims (1)

[Scope of Claims] 1. Means for progressively feeding a strip-like workpiece fed out in a horizontal state into a vertical state by twisting it by 90 degrees in the first stage of all processing steps, and holding both sides of the workpiece in the above state. A power feeding means that applies a predetermined plating current from the entire surface of the contact surface while making surface contact in a state of means for sequentially performing plating pretreatment and base plating on the workpiece; means for setting a predetermined area to be plated on the base-plated workpiece and applying minute partial plating to the area; and cleaning, etc. A plating post-processing means for post-processing, a workpiece drive means for holding the workpiece after plating between elastic materials and forcibly pulling it with a predetermined force and transporting it sequentially, and a next stage of the workpiece driving means. A high-speed plating method comprising means for twisting the vertical workpiece by 90 degrees and restoring it to a horizontal state. 2. An uncoiler that uncoils a coiled work in a horizontal state, a pair of horizontal rollers that rotate the shaft while holding the work horizontally, and a shaft that holds the work vertically at a predetermined distance from the rollers. A twisting roller consisting of a pair of rotating vertical rollers that twists a horizontal workpiece 90 degrees and progressively feeds it in a vertical position, and a pair of conductive sliders each having a flat surface that makes surface contact with the workpiece face each other. The contact surfaces between the power supply device, which applies a plating current to one of the power supply devices by applying a predetermined pressure while holding the workpiece between both sliders, and the workpiece, which is transferred in a vertical state, are each inclined inward. a guide roller in which book rollers are arranged close to each other so that their rotation axes form an isosceles triangle; a pretreatment and base plating treatment device that performs predetermined pretreatment and base plating treatment on the workpiece; A partial plating device that sets a plating area on a workpiece that has been subjected to base plating and performs plating of minute parts such as precious metals thereon, and a pair of endless belts to which a soft elastic material is pasted can be rotated in the same direction. a work drive device that grips and pulls the work, a pair of vertical rollers that grip and rotate the vertical workpiece, and a pair of vertical rollers that grip the workpiece horizontally at a predetermined distance from the rollers and rotate the shaft. A high-speed plating processing device consisting of a restoring roller that converts the workpiece from a vertical state to a horizontal state and feeds it progressively, and a coiler that winds the workpiece that has been returned to the horizontal state. 3. Between the uncoiler and the twisting roller, and between the restoring roller and the coiler, there is a slack tower consisting of a fixed roller that rotates on a horizontal axis and a plurality of movable rollers that are positioned above and below the roller and can move toward and away from each other. 2. The high-speed plating processing apparatus according to claim 2, wherein the high-speed plating processing apparatus is equipped with a plurality of plating apparatuses. 4. A slack detection device is provided in both the front and rear stages of the partial plating processing device, which is equipped with a sensor for detecting the amount of slack in the workpiece, and uses the detection signal to control the transfer speed of the workpiece, plating processing time, etc. A high-speed plating processing apparatus according to claims 2 and 3.