Welding devices, welding systems, and welding methods

Abstract

To prevent deterioration in the quality of welding.SOLUTION: Welding device 2 is a welding device for welding resin under the control of heating controller 1. Welding device 2 has a connector 200 for connecting to heating controller 1, a chip information ROM 22 that stores heating condition data indicating the conditions for heating to the resin, and a welding chip 21 that generates heat under the conditions indicated by the heating condition data based on the electric current supplied via connector 200 by the heating controller 1 that reads the heating condition data.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a welding device, a welding system and a welding method for welding resin. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a technique of melting a resin by heating it and then cooling it to melt the resin and thereby melt the resin onto another member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-012704 A Summary of the Invention [Problem to be solved by the invention]

[0004] Since the heating conditions required for welding resin differ depending on the type of resin to be welded or the type of material to which the resin is to be welded, conventional devices require the operator to set the heating conditions each time welding is performed, which can result in incorrect setting of the heating conditions and poor welding quality.

[0005] The present invention has been made in consideration of these points, and has an object to suppress deterioration in welding quality. [Means for solving the problem]

[0006] A welding device of a first aspect of the present invention is a welding device for welding resin under the control of a heating control device, and has a connector for connecting to the heating control device, a device memory unit for storing heating condition data indicating conditions for heating the resin, and a welding tip that generates heat under conditions indicated by the heating condition data based on a current supplied via the connector by the heating control device after reading the heating condition data.

[0007] The heating condition data is, for example, data indicating the relationship between the time since the welding tip starts to generate heat and the temperature of the welding tip, the amount of heat generated by the welding tip, the voltage applied to the welding tip, or the current flowing through the welding tip.

[0008] The device storage unit may store the heating condition data in association with tip identification information for identifying the welding tip.

[0009] The device storage unit may store different heating condition data in association with a plurality of use conditions.

[0010] The device storage unit may further store the number of times the welding tip has performed the welding process.

[0011] A welding system according to a second aspect of the present invention comprises a welding device for welding resin and a heating control device for controlling the welding device, wherein the welding device has a connector for connecting to the heating control device, a device memory unit for storing heating condition data indicating conditions for heating the resin, and a welding tip that generates heat under conditions indicated by the heating condition data based on a current supplied through the connector by the heating control device after reading the heating condition data, and the heating control device has a data management unit that acquires the heating condition data from the device memory unit through the connector, and a heating control unit that controls a power supply unit to apply a voltage determined based on the heating condition data acquired by the data management unit to the welding tip, or to flow a current determined based on the heating condition data to the welding tip.

[0012] The heating condition data is data indicating the relationship between the time since the welding tip starts to generate heat and the temperature of the welding tip, the amount of heat generated by the welding tip, the voltage applied to the welding tip, or the current flowing through the welding tip, and the heating control unit may control the power supply unit to apply a voltage determined based on the heating condition data to the welding tip for a time determined based on the heating condition data, or to flow a current determined based on the heating condition data to the welding tip.

[0013] The heating control device may further have a number management unit that writes data to the device memory unit indicating that the number of times the welding process has been performed by the welding tip has increased by one after the power supply unit applies a voltage to the welding tip or after the power supply unit passes a current through the welding tip in one welding process.

[0014] The device memory unit may further store welding count data indicating the number of welding processes performed by the welding device, and the count management unit may acquire the welding count data stored in the device memory unit before starting one welding process, and when one welding process is completed, write updated welding count data obtained by adding 1 to the welding count data acquired by the data management unit into the device memory unit.

[0015] The device memory unit may further store an electrical resistance value of the welding device, and when applying a voltage to the welding tip, the heating control unit may apply a voltage to the welding tip determined based on the heating condition data and the electrical resistance value.

[0016] The device memory unit stores different heating condition data associated with a plurality of usage conditions, and the heating control device further has a display unit that displays a plurality of resin names or use names corresponding to the plurality of usage conditions, and an operation receiving unit that receives an operation of selecting one resin name or use name from the plurality of resin names or use names displayed by the display unit, and the heating control unit may control the power supply unit to apply a voltage determined based on the heating condition data associated with the usage condition corresponding to the resin name or use name corresponding to the operation received by the operation receiving unit to the welding tip, or to flow a current determined based on the heating condition data to the welding tip.

[0017] The welding system may have a plurality of the welding devices, and the device memory unit of each of the plurality of welding devices may store the heating condition data in association with chip identification information for identifying the welding device, the data management unit may acquire the heating condition data from the plurality of welding devices in association with the chip identification information, and the heating control unit may control the power supply unit to apply a voltage determined based on the heating condition data associated with the chip identification information to the welding tip corresponding to the chip identification information, or to flow a current determined based on the heating condition data to the welding tip.

[0018] The heating control device may further have an operation receiving unit that receives an operation to input heating conditions, and the data management unit may store the heating condition data based on the heating conditions indicated by the operation received by the operation receiving unit in the device memory unit.

[0019] A welding method of a third aspect of the present invention is a welding method executed by a computer that controls a welding device for welding resin, the welding device having a device memory unit that stores heating condition data indicating conditions for heating the resin, and a welding tip that generates heat under conditions indicated by the heating condition data based on control data received from the computer, and the computer has a step of acquiring the heating condition data from the device memory unit, and a step of controlling a power supply unit to apply a voltage determined based on the acquired heating condition data to the welding tip, or to pass a current determined based on the heating condition data through the welding tip. Effect of the Invention

[0020] The present invention has an effect of suppressing deterioration in welding quality. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a diagram showing an overview of a welding system S. [Diagram 2] FIG. 4 is a conceptual diagram of heating condition data. [Diagram 3] FIG. 2 is a diagram illustrating a functional configuration of a control unit included in the heating control device. [Figure 4] 4 is a flowchart showing a process flow in a heating control device. [Diagram 5] FIG. 13 is a diagram showing a configuration of a welding system S1 according to a first modified example. [Figure 6] FIG. 13 is a diagram showing a configuration of a welding system S2 according to a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] [Welding System S Configuration] 1 is a diagram showing an overview of a welding system S. The welding system S is a system for "thermal crimping" in which a member to be welded, which is made of a thermoplastic resin, is welded and then cooled to weld the member to another member. The welding system S includes a heating control device 1 and a welding device 2.

[0023] The heating control device 1 is a device that controls a welding device 2 to weld a workpiece to another workpiece. The heating control device 1 has a display unit 11, a power supply unit 12, a control unit 13, a storage unit 14, and a connector 100.

[0024] The welding device 2, in a heated state, comes into contact with a workpiece to be welded, thereby welding the workpiece to another workpiece. The welding device 2 has a welding tip 21, a tip information ROM 22, and a connector 200. The welding tip 21 has a heating element that generates heat when a current flows through it. The heating element is formed, for example, in a rod shape.

[0025] The chip information ROM 22 is a device storage unit that stores various data related to the welding chip 21. Details of the data stored in the chip information ROM 22 will be described later. The welding chip 21 and the connector 200 are connected by a wire C1, and the chip information ROM 22 and the connector 200 are connected by a wire C2.

[0026] Fig. 1(a) shows the heating control device 1 and the welding device 2 in a state where they are not coupled to each other. Fig. 1(b) shows a state where the heating control device 1 and the welding device 2 are coupled by fitting the connector 100 and the connector 200 together. A user of the welding system S can perform welding of the members to be welded by coupling the connector 200 to the connector 100 as shown in Fig. 1(b).

[0027] In order to weld the workpieces, the heating control device 1 controls the voltage applied to the welding tip 21 or the current passed through the welding tip 21 based on the heating condition data stored in the tip information ROM 22, thereby making the welding tip 21 reach a temperature suitable for welding the workpieces. Conventionally, in order to make the temperature of the welding tip 21 suitable for the workpieces, the user of the welding system S had to set the heating conditions.

[0028] In contrast, in the welding system S according to this embodiment, the tip information ROM 22 stores heating condition data indicating the conditions for heating the workpieces, so that the heating control device 1 controls the current flowing through the welding tip 21 based on the heating condition data read from the tip information ROM 22, and the welding tip 21 reaches a temperature suitable for the workpieces without the user having to set the heating conditions. As a result, the user's work efficiency is improved. In addition, the welding tip 21 is prevented from reaching an inappropriate temperature due to a setting error made by the user, so that deterioration of welding quality can be suppressed. The heating condition data will be described in detail later.

[0029] Below, we will explain the outline of the configuration of the heating control device 1 and the welding device 2. The display unit 11 is, for example, a display, and displays an operating state of the welding system S and a screen for a user of the welding system S to make various settings.

[0030] The power supply unit 12 has a circuit that supplies power to the welding tip 21. The power supply unit 12 has, for example, a DC / DC converter or an AC / AC converter that generates an applied voltage to the welding tip 21 by boosting a voltage (e.g., 3.3 V) supplied from the control unit 13. In this case, the power supply unit 12 switches whether to output the applied voltage or not based on control data input from the control unit 13. The power supply unit 12 outputs the applied voltage corresponding to the control data. The power supply unit 12 may be a current source that can pass a current corresponding to the control data to the welding tip 21.

[0031] The control unit 13 has, for example, a CPU (Central Processing Unit), and controls various operations of the heating control device 1 by executing programs stored in the storage unit 14. Although details will be described later, the control unit 13 displays various information on the display unit 11, and controls the temperature of the welding tip 21 by controlling the voltage output by the power supply unit 12. The control unit 13 also reads out various data stored in the tip information ROM 22 and writes data to the tip information ROM 22.

[0032] The control unit 13, for example, inputs data to be displayed on the display unit 11 to the display unit 11, thereby causing the display unit 11 to display various information. The control unit 13 also inputs control data generated based on the heating condition data read from the tip information ROM 22 to the power supply unit 12, thereby causing the welding tip 21 to generate heat corresponding to the heating condition data.

[0033] The storage unit 14 has a storage medium such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit 14 stores a program executed by the control unit 13. The storage unit 14 also temporarily stores various data used by the control unit 13 to control the welding device 2.

[0034] The connector 100 is a connector for connecting the heating control device 1 to the welding device 2. The connector 100 has a terminal for connecting the power supply unit 12 and the welding tip 21, and a terminal for connecting the control unit 13 and the chip information ROM 22.

[0035] The connector 200 is a connector for connecting the welding tip 21 to the heating control device 1 and also connecting the chip information ROM 22 to the heating control device 1. When the connector 200 is fitted into the connector 100, the power supply unit 12 and the welding tip 21 are electrically connected, and the control unit 13 and the chip information ROM 22 are electrically connected.

[0036] The welding tip 21 is a welding tip that melts the workpiece by generating heat under the control of the heating control device 1. The welding tip 21 has a rod-shaped metal member that contacts the workpiece. The welding tip 21 heats the workpiece under the conditions indicated by the heating condition data stored in the tip information ROM 22, based on the current supplied by the heating control device 1, which has read the heating condition data, via the connectors 100 and 200. The welding tip 21 generates heat as a result of the current flowing through the welding tip 21, and the workpiece that the welding tip 21 contacts melts. Thereafter, the current stops flowing through the welding tip 21, and the welding tip 21 is cooled by compressed air discharged from the heating control device 1, causing the welding tip 21 to solidify.

[0037] The chip information ROM 22 is a device storage unit having a non-volatile memory, such as an EEPROM (Electrically Erasable and Programmable Read Only Memory). The chip information ROM 22 is mounted on a printed circuit board together with the connector 200, for example. The chip information ROM 22 may be integrated with the welding chip 21, but is preferably configured separately from the welding chip 21 to reduce the influence of heat generated by the welding chip 21.

[0038] The tip information ROM 22 stores data used by the heating control device 1 to control the temperature or heat generation amount of the welding tip 21. The tip information ROM 22 stores, for example, heating condition data indicating conditions for heating the resin. The heating condition data is data indicating the relationship between the time after the welding tip 21 starts to generate heat and the temperature of the welding tip.

[0039] Fig. 2 is a conceptual diagram of heating condition data. The horizontal axis in Fig. 2 indicates time, and the vertical axis indicates temperature. T1 on the vertical axis is the softening temperature of the welded material, and T2 is the decomposition temperature of the welded material.

[0040] P1 to P8 on the horizontal axis indicate a number of steps in the welding process. P1 is the primary heating step, P2 is the primary welding step, P3 is the secondary heating step, P4 is the secondary welding step, P5 is the cooling step, P6 is the detachment heating step, P7 is the delay step, and P8 is the re-cooling step. The tip information ROM 22 thus stores heating condition data indicating the relationship between the elapsed time from when the welding tip 21 starts to generate heat and the temperature. The heating condition data may be data indicating the relationship between the elapsed time from when the welding tip 21 starts to generate heat and the amount of heat generated, the relationship between the elapsed time and the voltage, or the relationship between the elapsed time and the current. The heating condition data may include data indicating the relationship between the elapsed time and the strength at which the welding tip 21 is cooled. When the time for each step is fixed, the heating condition data may be data indicating the temperature of the welding tip 21, the amount of heat generated, the voltage applied to the welding tip 21, or the current flowing through the welding tip 21 in each step.

[0041] The heating conditions differ depending on the type of the welding tip 21. Therefore, the tip information ROM 22 may store the heating condition data in association with tip identification information for identifying the welding tip 21.

[0042] The heating conditions vary depending on the type of workpiece to be welded by the welding tip 21, the purpose of welding, the ambient temperature, etc. Therefore, the tip information ROM 22 may store different heating condition data in association with a plurality of use conditions.

[0043] Furthermore, the voltage to be applied to the welding tip 21 to cause the welding tip 21 to generate heat also differs depending on the electrical resistance value of the welding tip 21. Therefore, the tip information ROM 22 may further store the electrical resistance value of the welding tip 21.

[0044] Incidentally, the tip of the welding tip 21 collides with the workpiece every time a welding process is performed, and therefore deforms as the number of welding operations increases. As a result, it becomes necessary to replace the welding tip 21 when the number of welding operations reaches a number corresponding to the life of the welding tip 21. In order to enable the heating control device 1 to detect the need to replace the welding tip 21, the tip information ROM 22 may further store life data indicating the number of welding operations that the welding tip 21 can be used for, and welding count data indicating the number of times the welding tip 21 has performed a welding process.

[0045] [Functional configuration of control unit 13] 3 is a diagram showing a functional configuration of the control unit 13 of the heating control device 1. The control unit 13 executes a program stored in the power supply unit 12 to function as an output unit 131, an operation reception unit 132, a data management unit 133, a heating control unit 134, and a count management unit 135.

[0046] The output unit 131 outputs various information. In the example shown in FIG. 3, the output unit 131 displays, for example, a screen for accepting settings by a user on the display unit 11. Specifically, the output unit 131 outputs a plurality of resin names or application names corresponding to a plurality of use conditions. The resin name may be a product name or a number for identifying the resin. The application name is the name of a target member to which the welded member is to be welded or a portion to which the welded member is to be welded. The output unit 131 may display information indicating the temperature of the welding tip 21 on the display unit 11 based on an instruction from the heating control unit 134. The output unit 131 may transmit information to an external terminal via wireless communication.

[0047] The output unit 131 may also cause the display unit 11 to display that the life of the welding tip 21 is approaching or has reached its end. Specifically, the output unit 131 outputs predetermined information when the difference between the number of weldings indicated by the welding count data stored in the tip information ROM 22 and the number of possible weldings indicated by the life data is equal to or less than a threshold. The smaller the difference, the more the output unit 131 outputs warning information that is more likely to attract the user's attention.

[0048] When the difference between the number of welding times and the number of possible welding times indicated by the life data becomes 0, that is, when the life of the welding tip 21 has expired, the output unit 131 may cause the display unit 11 to display a screen for accepting a special operation for continuing the execution of the welding process. By the output unit 131 displaying such a screen, the user is motivated to replace the welding tip 21 early, since the user will need to perform a special operation every time a welding process is performed.

[0049] The operation receiving unit 132 receives a user's operation. For example, the operation receiving unit 132 receives an operation to select one resin name or use name from a plurality of resin names or use names displayed by the display unit 11. The operation receiving unit 132 notifies the heating control unit 134 of the selected resin name or use name indicated by the received operation. The operation receiving unit 132 may receive an operation to input heating conditions in order to create heating condition data to be stored in the chip information ROM 22.

[0050] The data management unit 133 acquires heating condition data from the chip information ROM 22 via the connector 100. The data management unit 133 notifies the acquired heating condition data to the heating control unit 134. The data management unit 133 may acquire data indicating the electrical resistance value of the welding tip 21 from the chip information ROM 22 and notify the heating control unit 134 of the data.

[0051] The data management unit 133 may store heating condition data based on the heating conditions indicated by the operation accepted by the operation acceptance unit 132 in the chip information ROM 22. By operating in this manner, the data management unit 133 can make the heating condition data stored in the chip information ROM 22 into data indicating the heating conditions desired by the user.

[0052] The heating control unit 134 executes the welding process by applying a voltage determined based on the heating condition data acquired by the data management unit 133 to the welding tip 21 via the power supply unit 12, or by passing a current determined based on the heating condition data through the welding tip 21. The heating control unit 134 applies a voltage corresponding to the heating condition data to the welding tip 21 or passes a current corresponding to the heating condition data through the welding tip 21, for example, by inputting control data corresponding to the voltage or current to be output by the power supply unit 12 to the power supply unit 12.

[0053] Specifically, the heating control unit 134 determines the voltage to be applied by the power supply unit 12 to the welding tip 21 or the current to be passed by the power supply unit 12 to the welding tip 21 based on a result of comparing the temperature indicated by the temperature data acquired from the welding tip 21 with the temperature indicated by the heating condition data. When it is necessary to increase the temperature, the heating control unit 134 increases the voltage to be applied by the power supply unit 12 to the welding tip 21 or the current to be passed by the welding tip 21, and when it is necessary to decrease the temperature, the heating control unit 134 decreases the voltage to be applied by the power supply unit 12 to the welding tip 21 or the current to be passed by the welding tip 21, or stops the output of the voltage or current to the power supply unit 12. The heating control unit 134 may cool the welding tip 21 by controlling a solenoid valve (not shown) that switches whether or not to release compressed air to blow air to the welding tip 21.

[0054] When the heating control unit 134 causes the power supply unit 12 to output a voltage based on the control data, the heating control unit 134 may control the power supply unit 12 to apply to the welding tip 21 a voltage determined based on the heating condition data read from the tip information ROM 22 and the electrical resistance value of the welding tip 21. For example, the heating control unit 134 refers to a table in which temperature differences and current values ​​are associated with each other to determine the magnitude of the current to be passed through the welding tip 21 based on the difference between the temperature indicated by the heating condition data and the current temperature of the welding tip 21, and determines the voltage by multiplying the current value and the electrical resistance value. By the heating control unit 134 determining the voltage in this manner, the power supply unit 12 can apply to the welding tip 21 a voltage suitable for each welding tip 21 even if the electrical resistance values ​​of the welding tips 21 vary.

[0055] When the number of welding operations notified by the number management unit 135 described later reaches the number of operations corresponding to the life of the welding tip 21, the heating control unit 134 does not start the welding process, and causes the display unit 11 to display warning information via the output unit 131. When the operation reception unit 132 receives an operation for executing the welding process after the display unit 11 displays the warning information, the heating control unit 134 may instruct the power supply unit 12 to apply a voltage or pass a current. By operating in this manner, the heating control unit 134 can prevent the welding tip 21 from being used for a long period of time despite having reached the end of its life.

[0056] The heating control unit 134 may apply a voltage determined based on heating condition data associated with a use condition corresponding to a resin name or a use name corresponding to an operation received by the operation receiving unit 132 to the welding tip 21, or may pass a current determined based on the heating condition data to the welding tip 21. Specifically, the heating control unit 134 identifies heating condition data corresponding to a resin name or a use name designated by a user from among a plurality of heating condition data corresponding to each of a plurality of use conditions stored in the tip information ROM 22, and controls the power supply unit 12 to apply a voltage corresponding to the identified heating condition data to the welding tip 21, or pass a current corresponding to the heating condition data to the welding tip 21. By operating the heating control unit 134 in this manner, even if the heating conditions differ depending on the type of resin or the type of use, the power supply unit 12 can output a voltage or current appropriate for the type and use of the welded material to the welding tip 21.

[0057] When the heating condition data includes data indicating the time for each process, the heating control unit 134 may control the power supply unit 12 to apply a voltage determined based on the heating condition data to the welding tip 21 for a time determined based on the heating condition data. Similarly, the heating control unit 134 may control the power supply unit 12 to flow a current determined based on the heating condition data to the welding tip 21 for a time determined based on the heating condition data. By operating the heating control unit 134 in this manner, heating and cooling suitable for the welding tip 21 can be performed when the optimal time for each process differs depending on the welding tip 21.

[0058] The heating control unit 134 executes the heating and cooling processes indicated by the heating condition data, and when the welding process for one workpiece is completed, notifies the number management unit 135 that the welding process has been completed.

[0059] The number of times management unit 135 acquires the welding number data stored in the tip information ROM 22 before the heating control unit 134 starts one welding process. After the power supply unit 12 applies a voltage to the welding tip 21 in one welding process or after the power supply unit 12 passes a current through the welding tip 21 in one welding process, the number of times management unit 135 writes welding number data indicating that the number of times the welding process has been performed by the welding tip 21 has increased by one to the tip information ROM 22. For example, when one welding process is completed, the number of times management unit 135 writes updated welding number data obtained by adding 1 to the welding number data acquired before the welding process was performed to the tip information ROM 22.

[0060] The chip information ROM 22 may have a welding count area including a number of addresses corresponding to an upper limit number of welding counts, and the count management unit 135 may write a predetermined value to an address among the addresses to which a predetermined value (e.g., 1) has not been written each time a welding process is performed. In this case, the welding count data is composed of a plurality of data indicating the values ​​of the plurality of addresses included in the welding count area. The count management unit 135 can identify the welding count based on the number of predetermined values ​​in the plurality of data.

[0061] [Processing flow in heating control device 1] Fig. 4 is a flowchart showing the flow of processing in the heating control device 1. The flowchart shown in Fig. 4 starts from the point when the power supply of the heating control device 1 is turned on.

[0062] The heating control unit 134 identifies the number of past welding operations of the welding tip 21 connected to the heating control device 1 based on the welding count data read by the count management unit 135 from the tip information ROM 22 (S1). If the identified welding count is equal to or greater than the life count of the welding tip 21 (YES in S2), the heating control unit 134 causes the output unit 131 to display warning information on the display unit 11 (S3). If the identified welding count is less than the life count (NO in S2), the heating control unit 134 advances the process to S5.

[0063] If the operation receiving unit 132 receives an operation to start welding after the display unit 11 displays the warning information (YES in S4), the heating control unit 134 acquires the heating condition data read by the data management unit 133 from the chip information ROM 22 (S5). If the operation receiving unit 132 does not receive an operation to start welding after the display unit 11 displays the warning information, the heating control unit 134 waits without proceeding to S5.

[0064] When the heating control unit 134 acquires the heating condition data, the heating control unit 134 controls the power supply unit 12 to heat or cool the welding tip 21 based on the heating condition data (S6). The heating control unit 134 continues the welding process of S4 until the heating control unit 134 executes all the heating and cooling operations indicated by the heating condition data (NO in S7). When the heating control unit 134 executes the welding process including all the heating and cooling processes indicated by the heating condition data (YES in S7), the number management unit 135 increases the number of welding times by updating the welding number data stored in the tip information ROM 22 (S8).

[0065] If the increased number of welding times is equal to or greater than the lifespan number of times (YES in S9), the output unit 131 displays warning information indicating that the welding tip 21 needs to be replaced on the display unit 11 (S10). By displaying such warning information, the user can replace the welding tip 21 before the next welding process is performed. If the increased number of welding times is less than the lifespan number of times (NO in S9), the control unit 13 ends the welding process.

[0066] [First Modification] 1, the heating control device 1 and the welding device 2 are configured to be connected by the connector 100 and the connector 200, but the number of connectors included in the heating control device 1 and the welding device 2 is arbitrary. Fig. 5 is a diagram showing the configuration of a welding system S1 according to a first modified example.

[0067] In the welding system S1, the heating control device 1 has a connector 101 and a connector 102, and the welding device 2 has a connector 201 and a connector 202. The power supply unit 12 is connected to the welding tip 21 via the connector 101 and the connector 201, and the control unit 13 is connected to the chip information ROM 22 via the connector 102 and the connector 202. In this configuration, the welding tip 21 and the chip information ROM 22 can be easily separated, so that the chip information ROM 22 is less susceptible to the effect of heat generated by the welding tip 21.

[0068] [Second modified example] In Fig. 1, the heating control device 1 controls one welding device 2, but the heating control device 1 may control multiple welding devices 2. Fig. 6 is a diagram showing the configuration of a welding system S2 according to a second modified example. In the welding system S2 shown in Fig. 6, the chip information ROM 22 of each of the multiple welding devices 2 stores heating condition data in association with chip identification information for identifying the welding chip 21.

[0069] The data management unit 133 acquires heating condition data in association with the chip identification information from the multiple welding devices 2. The heating control unit 134 controls the power supply unit 12 to apply a voltage determined based on the heating condition data associated with the chip identification information to the welding tip 21 corresponding to the chip identification information, or to pass a current determined based on the heating condition data associated with the chip identification information to the welding tip 21 corresponding to the chip identification information. The heating control device 1 has multiple power supply units 12, and the heating control unit 134 causes the power supply units 12 corresponding to each of the multiple welding devices 2 to output a voltage or current based on the heating condition data of the welding tip 21 connected to each power supply unit 12.

[0070] Each of the multiple heating control devices 1 (display unit 11 and power supply unit 12) controls multiple welding devices 2 (welding device 2-1 to welding device 2-m, welding device 2-1 to welding device 2-n, m and n are natural numbers). The welding system S2 further includes a control device 3 that controls the multiple heating control devices 1. The control device 3 is, for example, a PLC (Programmable Logic Controller). The welding system S2 configured in this manner makes it possible to perform welding processes on multiple parts in parallel.

[0071] [Effects of Welding System S] In the welding system S according to this embodiment, heating condition data indicating the temperature conditions for heating the workpieces is stored in the tip information ROM 22, so that the heating control device 1 can read out the heating condition data stored in the tip information ROM 22 and set the temperature of the welding tip 21 to a temperature suitable for the workpieces without the user having to set the heating conditions. As a result, it is possible to prevent the welding tip 21 from reaching an inappropriate temperature due to an error in setting the heating conditions, and therefore it is possible to suppress deterioration in the quality of welding.

[0072] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. For example, all or part of the device can be configured by distributing or integrating functionally or physically in any unit. In addition, new embodiments resulting from any combination of multiple embodiments are also included in the embodiments of the present invention. The effect of the new embodiment resulting from the combination combines the effect of the original embodiment. [Explanation of symbols]

[0073] 1 Heating control device 2 Welding device 3. Control device 11 Display section 12 Power supply section 13 Control section 14 Storage section 21 Welding tip 22 Chip Information ROM 100 Connectors 101 Connector 102 Connector 131 Output section 132 Operation reception section 133 Data Management Department 134 Heating control section 135 Number of times management department 200 Connectors 201 Connector 202 Connector

Claims

1. A welding device for welding resin under the control of a heating control device, A connector for connecting to the heating control device; A device storage unit that stores heating condition data indicating conditions for heating the resin; a welding tip that generates heat under conditions indicated by the heating condition data based on a current supplied via the connector by the heating control device that has read the heating condition data; A welding device having

2. The heating condition data is data indicating a relationship between a time from when the welding tip starts to generate heat, and a temperature of the welding tip, a heat generation amount of the welding tip, a voltage applied to the welding tip, or a current flowing through the welding tip. The welding device of claim 1 .

3. the device storage unit stores the heating condition data in association with tip identification information for identifying the welding tip; The welding device of claim 1.

4. The device storage unit stores the heating condition data in association with a plurality of use conditions, each of which is different. The welding device of claim 1 .

5. The device storage unit further stores the number of times the welding tip has performed the welding process. The welding device of claim 1.

6. A welding device for welding a resin, and a heating control device for controlling the welding device, The welding device comprises: A connector for connecting to the heating control device; A device storage unit that stores heating condition data indicating conditions for heating the resin; a welding tip that generates heat under conditions indicated by the heating condition data based on a current supplied via the connector by the heating control device that has read the heating condition data; having The heating control device includes: a data management unit that acquires the heating condition data from the device storage unit via the connector; a heating control unit that controls a power supply unit to apply a voltage determined based on the heating condition data acquired by the data management unit to the welding tip, or to pass a current determined based on the heating condition data to the welding tip; having Welding system.

7. The heating condition data is data indicating a relationship between a time from when the welding tip starts to generate heat, and a temperature of the welding tip, a heat generation amount of the welding tip, a voltage applied to the welding tip, or a current flowing through the welding tip, The heating control unit controls the power supply unit to apply a voltage determined based on the heating condition data to the welding tip for a time determined based on the heating condition data, or to pass a current determined based on the heating condition data through the welding tip. The welding system of claim 6.

8. The heating control device further includes a number management unit that writes data indicating that the number of times the welding process is performed by the welding tip has increased by one after the power supply unit applies a voltage to the welding tip in one welding process or after the power supply unit passes a current through the welding tip to the device storage unit. The welding system of claim 6.

9. the device storage unit further stores welding count data indicating the number of welding processes performed by the welding device; the number-of-times management unit acquires the welding number data stored in the device storage unit before starting one welding process, and writes updated welding number data obtained by adding 1 to the welding number data acquired by the data management unit into the device storage unit when one welding process is completed; The welding system of claim 8.

10. The device memory unit further stores an electrical resistance value of the welding device, When applying a voltage to the welding tip, the heating control unit applies a voltage determined based on the heating condition data and the electrical resistance value to the welding tip. The welding system of claim 6.

11. the device storage unit stores the heating condition data in association with a plurality of use conditions, each of which is different; The heating control device includes: a display unit that displays a plurality of resin names or application names corresponding to the plurality of use conditions; an operation receiving unit that receives an operation of selecting one resin name or one use name from the plurality of resin names or use names displayed on the display unit; and The heating control unit controls the power supply unit to apply a voltage determined based on the heating condition data associated with the use condition corresponding to the resin name or the application name corresponding to the operation received by the operation receiving unit to the welding tip, or to flow a current determined based on the heating condition data to the welding tip. The welding system of claim 6.

12. the welding system includes a plurality of the welding devices; the device storage unit of each of the plurality of welding devices stores the heating condition data in association with chip identification information for identifying the welding device; the data management unit acquires the heating condition data from the plurality of welding devices in association with the chip identification information; The heating control unit controls the power supply unit to apply a voltage determined based on the heating condition data associated with the chip identification information to the welding tip corresponding to the chip identification information, or to pass a current determined based on the heating condition data through the welding tip. The welding system of claim 6.

13. The heating control device further includes an operation receiving unit that receives an operation to input heating conditions, the data management unit stores the heating condition data based on the heating condition indicated by the operation accepted by the operation acceptance unit in the device storage unit. Further comprising The welding system of claim 6.

14. A welding method executed by a computer that controls a welding device for welding a resin, comprising: The welding device comprises: A device storage unit that stores heating condition data indicating conditions for heating the resin; a welding tip that generates heat under conditions indicated by the heating condition data based on the control data received from the computer; having The computer includes: acquiring the heating condition data from the device storage unit; controlling a power supply unit to apply a voltage determined based on the acquired heating condition data to the welding tip, or to pass a current determined based on the heating condition data through the welding tip; The welding method comprising the steps of:

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