JP6899138B2 - Soldering device with safety mechanism and trowel temperature control method - Google Patents

Description

The present invention relates to a soldering apparatus with a safety mechanism and a trowel temperature control method. More specifically, the use and non-use of a trowel are detected, and the trowel temperature is maintained at a high set temperature during use. When not in use, the trowel tip temperature is switched to a low sleep temperature.

A soldering device with a safety mechanism that detects the use and non-use of a soldering iron, maintains the tip temperature at a high set temperature when in use, and switches the tip temperature to a low sleep temperature when not in use. For example, it is known as disclosed in Patent Document 1 and Patent Document 2.

Of these, in the first soldering apparatus disclosed in Patent Document 1, as a method of detecting the use and non-use of the soldering iron, the iron tip temperature is lowered by melting the solder having a low iron tip at the time of soldering. Therefore, the trowel temperature is measured, and if the trowel temperature drops below the sleep detection temperature for transition to sleep from the set temperature at the time of soldering, it is determined that the solder trowel is used. When the time at which the tip temperature does not fall below the sleep detection temperature exceeds a certain period of time, it is determined that the soldering iron is not used.
However, as described above, in the method of simply comparing the measured trowel temperature with the sleep detection temperature, the trowel temperature gradually changes due to changes in the outside temperature and the influence of airflow when the trowel is not used. Even if the temperature falls below the sleep detection temperature, it is determined that the trowel is used, and the trowel tip temperature may not switch to the sleep temperature.

On the other hand, the second soldering apparatus disclosed in Patent Document 2 uses a vibration sensor to detect the use and non-use of the soldering iron, and the time during which the vibration sensor does not continuously detect the vibration of the soldering iron. When the set time is exceeded, it is judged that the soldering iron is not used. Therefore, this second soldering apparatus is not affected by the outside air temperature, the air flow, etc. in detecting the use and non-use of the soldering iron, and therefore, as compared with the first soldering apparatus disclosed in Patent Document 1. It can be said that it is superior in safety.
However, this second soldering device is also further improved from the viewpoint of enabling the use and non-use of the soldering iron to be detected by a simpler configuration without using a vibration sensor. It left room.

Japanese Patent No. 36770072 Japanese Unexamined Patent Publication No. 11-192547

The technical problem of the present invention is that the use and non-use of the solder trowel can be detected easily and accurately by a new method different from the conventional method in order to switch the heater to the sleep mode when the solder trowel is not used. To do so.

In order to solve the above problems, the soldering apparatus with a safety mechanism of the present invention controls a soldering iron, a heater for heating the iron tip of the soldering iron, a temperature sensor for measuring the temperature of the iron tip, and the heater. The controller has a calculation unit for obtaining a negative rate of change of the tip temperature from the tip temperature measured by the temperature sensor, and the controller is based on a numerical value of the change rate obtained by the calculation section. The heater control unit has a comparison unit for comparing with a value and a heater control unit for controlling the heater based on the comparison result in the comparison unit, and the heater control unit is used when the numerical value of the rate of change is larger than the reference value. By maintaining the heater in the use mode, the tip temperature is maintained at the set temperature, and when the value of the rate of change is smaller than the reference value for a certain period of time, the heater is switched to the sleep mode. It is characterized in that the tip temperature is lowered to a sleep temperature lower than the set temperature.

In the present invention, when the numerical value of the rate of change is larger than the reference value, the heater control unit maintains the heater in the use mode by resetting the count timer of the heater control unit, and the numerical value of the rate of change. When is smaller than the reference value, it is desirable that the count is continued without resetting the count timer, and the heater is switched to the sleep mode when the count timer is counted up.

Further, it is desirable that the controller is configured to reduce the measurement sensitivity by the temperature sensor when the heater is switched to the sleep mode and the tip temperature is lowered to the sleep temperature.

In the present invention, preferably, the controller classifies the solder trowels into a plurality of groups based on the shape and size of the trowel tip, and sets the optimum rate of change and the reference value for each classification for each classification. It is configured so that the tip temperature can be controlled.

Further, according to the present invention, it is a temperature control method that controls the tip temperature according to the use and non-use of the soldering iron, and the tip temperature is constantly measured by a temperature sensor, and the measured negative tip temperature is negative. The rate of change is calculated and the value of the rate of change is compared with the reference value. If the value of the rate of change is larger than the reference value, it is determined that a soldering iron is used, and a heater for heating the tip of the iron is used. By maintaining the use mode, the trowel tip temperature is maintained at the set temperature at the time of use, and when the value of the rate of change is smaller than the reference value for a certain period of time, the solder trowel is in an unused state. Provided is a method for controlling the tip temperature of a solder trowel, which comprises lowering the tip temperature to a sleep temperature lower than the set temperature by determining and switching the heater to a sleep mode.

In this case, the count timer is set at the start of use of the solder trowel, and when the numerical value of the rate of change is larger than the reference value, the heater is maintained in the use mode by resetting the count timer each time. When the value of the rate of change is smaller than the reference value, it is desirable to continue counting without resetting the count timer and to switch the heater to sleep mode when the count timer is counted up.

In the present invention, when the heater is switched to the sleep mode when the soldering iron is not used, it is determined whether the soldering iron is in the used state or the unused state based on the rate of change of the iron tip temperature. Compared with the conventional method of comparing the trowel tip temperature and the sleep detection temperature, the use and non-use of the solder trowel can be detected easily and accurately.

It is a block diagram which shows one Embodiment of the soldering apparatus with a safety mechanism which concerns on this invention. It is a diagram which shows the change of the tip temperature.

Hereinafter, an embodiment of the soldering apparatus with a safety mechanism according to the present invention will be described with reference to the drawings. As shown in FIG. 1, this soldering apparatus includes a hand-held soldering iron 1 and a controller 2 for controlling the soldering iron 1.

The solder trowel 1 has a grip portion 3 for holding in a hand and a trowel portion 4 extending forward from the tip of the grip portion 3, and the inside of the trowel portion 4 gradually tapers. A copper trowel tip 5 having a trowel tip 6 at the tip and an electric heating type heater 7 for heating the trowel tip 5 are built in, and the temperature of the trowel tip 6 is kept inside the trowel tip 5. A temperature sensor 8 for constant measurement is built in.

When soldering the soldering portion 9 with the soldering iron 1, linear solder 10 is supplied to the soldering tip 6 with the soldering tip 6 in contact with the soldering portion 9, and the soldering iron tip 6 is used. The solder melted by heat is supplied to the soldering portion 9 to perform soldering. At this time, the temperature of the trowel tip 6, that is, the trowel tip temperature is temporarily set by the trowel tip 6 coming into contact with the low-temperature soldering portion 9 or melting the low-temperature linear solder 10. It drops sharply and greatly.

Next, before explaining the configuration and operation of the controller 2, the change in the tip temperature H when soldering a plurality of soldering portions 9 using the soldering iron 1 will be described with reference to FIG.
First, when the power of the heater 7 is turned on at time T0 to start soldering, the trowel tip temperature H gradually rises due to the heating of the trowel tip 6 by the heater 7, and the set temperature Ho (for example, for example) at time T1. It reaches 250-450 ° C.) and maintains the set temperature Ho while making small changes due to the influence of the outside air temperature, air flow, and the like.

Next, when the soldering of the first soldering portion 9 starts at time T2, the trowel tip 6 contacts the low-temperature terminal or melts the low-temperature linear solder 10, so that the trowel tip temperature H suddenly rises. descend. Then, when the soldering of one soldering part 9 is completed, the trowel tip temperature H rises again, and when the soldering of the next soldering part 9 is started, the trowel tip temperature H falls again, and so on. Each time the soldering is performed, the soldering tip temperature H is large and rapidly drops and rises repeatedly. The vertical width of the actual trowel temperature H at this time is about 3-4 ° C. The state at this time is the trowel use state. The state of change in the tip temperature H in the state of using the trowel is slightly exaggerated for the sake of clarity.

Subsequently, when the soldering work is completed at time T3 and the soldering iron 1 is placed on a trowel stand or the like and becomes unused, the trowel tip temperature H rises to the set temperature Ho again, and then the air flow or the outside It fluctuates in a gradual and small temperature range (about ± 2 ° C) due to the influence of changes in temperature.

Then, when the trowel non-use state continues for a certain period of time, the heater 7 is switched to the sleep mode by the controller 2 at time T4 for power saving and safety, and the trowel tip temperature H drops to the sleep temperature Hs (for example, 200 ° C.). To do. Further, when this sleep mode continues for a certain period of time, the power of the heater 7 is turned off at time T5.

Therefore, in the present invention, it is determined whether the solder trowel 1 is in the used state or the unused state based on the rate of change of the trowel temperature H, which changes greatly during soldering, and the solder trowel 1 is put into the used state. In some cases, the trowel temperature H is maintained at the set temperature Ho, and when the solder trowel 1 is not in use, the heater 7 is switched to the sleep mode as described above to obtain the trowel temperature H. Is lowered to the sleep temperature Hs.

Therefore, as shown in FIG. 1, the controller 2 includes a calculation unit 11 for obtaining a negative rate of change R of the tip temperature H from the tip temperature H measured by the temperature sensor 8, and the calculation unit 11. Suitable for the comparison unit 12 that compares the value of the rate of change R obtained in 1 with the reference value Ro, the heater control unit 13 that controls the heater 7 based on the comparison result by the comparison unit 12, and the solder trowel 1 to be used. It has a control mode setting unit 14 for setting a control mode.

The calculation unit 11 calculates a negative rate of change R of the trowel temperature H at the temperature measurement point P as a differential coefficient from a minute change in the trowel temperature H continuously sent from the temperature sensor 8. Then, the calculated numerical value of the rate of change R is input to the comparison unit 12. The negative rate of change R of the trowel temperature H is the rate of change when the trowel temperature decreases.

A reference value Ro is input in advance from the reference value setting unit 15 to the comparison unit 12, and the reference value Ro and the numerical value of the rate of change R sent from the calculation unit 11 are the comparison unit 12. Is always compared in. Then, when the numerical value of the rate of change R is larger than the reference value Ro, the control signal S is output from the comparison unit 12 toward the heater control unit 13. The reference value Ro is set to, for example, "5".

The heater control unit 13 has a count timer 16 that is set when the power of the heater 7 is turned on and starts counting. When the count timer 16 counts up the first set time Tm, the heater 7 Is switched from the use mode to the sleep mode, and when the count timer 16 subsequently counts up the second set time Tn, the power of the heater 7 is turned off.

Specifically, when the control signal S is sent from the comparison unit 12 to the heater control unit 13, the heater control unit 13 resets the count timer 16 each time and puts the heater 7 in the use mode as it is. maintain.
On the other hand, when the control signal S is not sent from the comparison unit 12 to the heater control unit 13, the heater control unit 13 continues counting as it is without resetting the count timer 16, and finally the control signal S. When the first set time Tm elapses from the time when is sent (time T3) (time T4), the heater 7 is switched to the sleep mode, and further, the second is continued from the time when the heater 7 is switched to the sleep mode (time T4). 2 When the set time Tn has elapsed (time T5), the power of the heater 7 is turned off.

When the heater 7 is switched to the sleep mode, the sensitivity of the temperature sensor 8 is prevented from suddenly dropping the trowel tip temperature H due to a cause other than soldering, that is, disturbance, and the sleep mode is released. Is desirable to be lower than in the use mode. It is conceivable that the cause of the disturbance is that the wind from the blower or the wind caused by the operator hits the trowel tip 6, or a low-temperature foreign substance comes into contact with the trowel tip 6.

To release the sleep mode, the trowel temperature H is set to a rate of change R larger than the reference value Ro by operating the sleep release switch 17 provided in the heater control unit 13 or by rapidly cooling the trowel tip 6. This can be done by rapidly lowering. As a method of rapidly lowering the trowel tip temperature H, for example, there is a method of bringing the trowel tip 6 into contact with a sponge or cloth containing water.
When the power of the heater 7 is turned off, the heater 7 can be returned to the use mode by turning on the power switch.

In the control mode setting unit 14, the soldering iron 1 is classified into a plurality of groups based on the shape of the iron tip, the size of the iron tip, and the like, and is input. And the reference value Ro etc. are input, and when the soldering iron 1 is connected to the controller 2 at the time of soldering, the set temperature Ho and the reference value Ro suitable for the soldering iron 1 are automatically selected or by button operation. The temperature is controlled based on the temperature control.

Further, the controller 2 is provided with a signal generation unit 18, and the signal generation unit 18 is connected to the heater control unit 13, and various types such as a buzzer and a lamp are used according to a change in the tip temperature H. The signal is configured to be emitted towards the operator. Specifically, in FIG. 2, the signal generation unit 18 sounds a buzzer at regular intervals while the power is turned on and the trowel temperature H rises to the set temperature Ho, that is, between times T0 and T1. Further, the buzzer sounds when the heater 7 is switched to the sleep mode (T4), and the buzzer sounds even when the trowel temperature H greatly exceeds or falls below the set temperature Ho. Has been done. At this time, the lamp may be turned on or blinked at the same time as the buzzer.

Further, in the soldering iron device, a vibration sensor 19 is built in the grip portion 3 of the soldering iron 1, and the movement of the soldering iron 1 is detected by the vibration sensor 19, so that the iron tip temperature H can be used. It can also be configured to give an alarm if soldering is attempted to be out of the temperature range.

1 Solder iron 2 Controller 6 Trowel 7 Heater 8 Temperature sensor 11 Calculation unit 12 Comparison unit 13 Heater control unit 16 Count timer H Trowel temperature Ho Set temperature Hs Sleep temperature R Change rate Ro Reference value

Claims (6)

It has a soldering iron, a heater that heats the tip of the soldering iron, a temperature sensor that measures the temperature of the tip of the soldering iron, and a controller that controls the heater.
The controller includes a calculation unit that obtains a negative rate of change of the trowel temperature from the trowel temperature measured by the temperature sensor, and a comparison unit that compares the numerical value of the rate of change obtained by the calculation unit with a reference value. It has a heater control unit that controls the heater based on the comparison result in the comparison unit.
When the value of the rate of change is larger than the reference value, the heater control unit maintains the tip temperature at the set temperature by maintaining the heater in the use mode, and the value of the rate of change is smaller than the reference value. When the state continues for a certain period of time, the heater is switched to the sleep mode to lower the tip temperature to a sleep temperature lower than the set temperature.
A soldering device with a safety mechanism. The heater control unit maintains the heater in the use mode by resetting the count timer of the heater control unit when the value of the rate of change is larger than the reference value, and the value of the rate of change is smaller than the reference value. The soldering according to claim 1, wherein the counting is continued without resetting the count timer, and the heater is switched to the sleep mode when the count timer is counted up. apparatus. The controller is configured to reduce the measurement sensitivity of the temperature sensor when the heater is switched to the sleep mode and the soldering tip temperature is lowered to the sleep temperature. 2. The soldering apparatus according to 2. The controller classifies solder trowels into a plurality of groups based on the shape and size of the trowel, and sets the optimum rate of change and reference value for each classification to control the trowel temperature for each classification. The soldering apparatus according to any one of claims 1 to 3, wherein the soldering apparatus is configured to be possible. It is a temperature control method that controls the tip temperature according to the use and non-use of soldering iron.
The trowel temperature is constantly measured by a temperature sensor, the negative rate of change of the measured trowel temperature is obtained, and the numerical value of the rate of change is compared with the reference value.
If the value of the rate of change is larger than the reference value, it is determined that the solder trowel is used, and the trowel temperature is set to the set temperature at the time of use by maintaining the heater for heating the trowel in the use mode. Maintain and
If the value of the rate of change is smaller than the reference value for a certain period of time, it is determined that the soldering iron is in an unused state, and the heater is switched to the sleep mode to change the iron tip temperature from the set temperature. Reduce to low sleep temperature,
A method for controlling the temperature of the tip of a solder trowel. A count timer is set at the start of use of the solder trowel, and when the numerical value of the rate of change is larger than the reference value, the heater is maintained in the use mode by resetting the count timer each time, and the rate of change is changed. The trowel according to claim 5, wherein when the numerical value is smaller than the reference value, counting is continued without resetting the count timer, and the heater is switched to the sleep mode when the count timer is counted up. Temperature control method.

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