TW202211744A - Heating tip unit - Google Patents

Abstract

The present invention provides a heating tip unit which can make a temperature measuring part of a temperature sensor fully contact a fixing portion of a heating tip. In particular, the present invention provides a heating tip unit 1 in which a thermocouple 3 is installed on a plate-shaped heating tip 2 for thermocompression bonding a terminal wire to a terminal member, wherein the heating tip 2 is provided with: a soldering iron 6 which has a soldering iron front end 13 to be abutted against a terminal wire on a soldering iron body 11; a pair of connecting arms 7which extend upward from the left and right ends of the soldering iron body 11 so as to be separated from each other, and allow a current from a power source to flow in the soldering iron body 11 to raise the temperature of the soldering iron 6; and a temperature-measuring fixing part 35 which is provided on the soldering iron 6 with a temperature measuring contact 3a of the thermocouple 3 being fixed thereon. The temperature-measuring fixing part 35 has a pair of fixing contact surfaces 35a for the temperature measuring contacts 3a to contact, and is set in such a state that the separating distance between the fixing contact surfaces 35a gradually expands from the soldering iron 6 side to the upper side.

Description

Heating nozzle unit

The present disclosure relates to a heater nozzle unit for thermally crimping a terminal wire to a terminal member.

For the operation of thermocompression bonding of the lead wire for the terminal to the terminal member, for example, in the operation of thermocompression bonding of the wire to the terminal part of the iron core in the manufacture of electronic components such as chip inductors, thermocompression bonding is used. heater nozzle unit. Specifically, a thermocouple as a temperature sensor is attached to a heater tip whose temperature of the soldering iron part is heated to form a heater tip unit, and this heater tip unit is attached to a tool holder of a thermocompression bonding apparatus. . Furthermore, the thermocompression bonding device is activated, and the lead wire for the terminal placed on the terminal member is pressurized and rapidly heated by the soldering iron portion of the heating nozzle, and the lead wire for the terminal is thermocompressed to the terminal member (for example, refer to). Patent Document 1).

[Prior Art Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2001-284781

However, in the heating nozzle (heating nozzle unit) described in the above-mentioned patent document, the core wire of the thermocouple is passed through the through hole of the heating nozzle, and arc welding is performed in this state, and the temperature measurement junction (temperature sensing point) The formation of the temperature measuring part of the detector) and the fixing (bonding) of the temperature measuring junction to the heater nozzle are performed simultaneously. However, sometimes due to poor welding, the temperature measuring junction cannot be formed, and only the core wire is bonded to the heating nozzle, resulting in poor yield. Therefore, it is preferable to form a temperature measuring contact in advance before fixing the heating nozzle, and make this temperature measuring contact (temperature measuring part) sufficiently contact the heating nozzle, and fix it in this state.

The present invention has been developed in view of the above-mentioned circumstances, and an object thereof is to provide a heater nozzle unit that can sufficiently contact the temperature measuring portion of the temperature sensor with the fixing portion of the heater nozzle.

The present invention is proposed to achieve the above-mentioned object, and the one described in the item 1 is a nozzle unit in which a temperature sensor is mounted on a plate-shaped plate for thermally crimping a lead wire for a terminal to a terminal member. made on the heated mouth,

The aforementioned heating nozzle system has:

The soldering iron part is provided in the soldering iron body with the front end part of the soldering iron abutting against the lead wire for the terminal;

a pair of connecting arm portions extending from the left and right ends of the soldering iron body to be separated from each other upwards, and allowing current from a power source to flow through the soldering iron body to heat the soldering iron portion; and

The temperature-measuring fixing part is arranged on the above-mentioned soldering iron part, and is used for fixing the temperature-measuring part of the temperature sensor,

The temperature measurement fixing part includes a pair of fixing contact surfaces with which the temperature measuring part comes into contact, and is set in a state where the distance between the fixing contact surfaces gradually widens upward from the soldering iron part side.

The item described in Item 2 is the nozzle unit described in Item 1, wherein the fixed contact surface is formed as a flat surface, and the temperature measurement portion is formed as a spherical body.

Item 3 is the nozzle unit described in Item 2, wherein the lead wire of the temperature sensor is accommodated in the lead wire accommodating cavity by using the gap between the connecting arm portions as a lead wire accommodating cavity,

And the said fixed contact surface is made to oppose the edge part of the lead wire accommodating hollow part.

Item 4 is the heater nozzle unit according to any one of Items 1 to 3, wherein the heater tip has an oxidation-resistant coating layer formed on at least the surfaces of the soldering iron portion and the temperature measurement fixing portion.

Item 5 is the nozzle unit described in Item 4, wherein an oxidation-resistant coating layer is formed on the surface of the temperature measurement portion fixed to the temperature measurement fixing portion.

Item 6 is the nozzle unit described in Item 4 or 5, wherein the oxidation-resistant coating layer is a nickel coating.

According to the present invention, the following excellent effects can be achieved.

According to the invention described in claim 1, since the temperature-measuring fixing portion includes a pair of fixing contact surfaces with which the temperature-measuring portion comes into contact, and the distance between the fixing contact surfaces is set so as to increase from the side of the soldering iron portion toward the upper side. In the state of gradually expanding, the temperature measuring part of the temperature sensor can fully contact the temperature measuring fixing part. Therefore, it is possible to configure a heater nozzle unit that can perform good fixation of the temperature measurement portion to the heater nozzle, and further enables good temperature measurement.

According to the invention described in claim 2, since the fixed contact surface is formed as a flat surface, and the temperature measurement portion is formed as a spherical body, the temperature measurement portion can easily make point contact with the fixed contact surface. In addition, when the temperature measuring part is pressed against the fixed contact surface, stress tends to concentrate and the temperature measuring part is less likely to float from the fixed contact surface. Thereby, the temperature measuring part can be fixed to the heater nozzle more favorably, and the temperature measurement of the heater nozzle can be performed more favorably.

According to the invention described in claim 3, the lead wire of the temperature sensor is accommodated in the lead wire accommodating cavity by using the gap between the connecting arm portions as the lead wire accommodating cavity, and the fixed contact surface is opposite to the lead wire accommodating cavity. Therefore, if the temperature sensor is inserted into the lead wire storage cavity with the temperature measurement part at the front, the temperature measurement part can be easily abutted on the fixed contact surface. Therefore, the preparation for fixing the temperature measurement part of the temperature sensor to the temperature measurement fixing part can be smoothly performed.

According to the inventions described in Items 4 to 6, even if heating and cooling are repeated, oxidation of the surface can be suppressed, and durability can be improved.

1: Heating nozzle unit

2,2': heating nozzle

3: Thermocouple

3a: Temperature measuring contact

3b: Wire

6,6': Soldering Iron Department

7: Connect the arm

11: Soldering iron body

13: The front end of the soldering iron

13a: Front end of soldering iron

15: Soldering iron recess

17: Installation hole

20,20': groove

21: Thin-walled part

25: core wire

26: Core wire covering material

27: Outer cladding material

30: Wire storage empty part

30a: Open mouth

31: Stop recess

32: Wire stopper

35: Temperature measurement fixing part

35a: Fixed contact surface

36: Groove

40: Soldering iron space department

A: Lead wire for terminal

B: Terminal member

t1, t2: thickness

FIG. 1 is a perspective view of a heater nozzle unit.

Fig. 2 is an explanatory view of the heater nozzle, wherein (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a side view.

Fig. 3 is an explanatory view of a temperature-measurement fixing portion of the heater nozzle, (a) is a front view, and (b) is a cross-sectional view.

Fig. 4 is an explanatory diagram of the procedure of installing the thermocouple in the heater nozzle, (a) is the state before the thermocouple is inserted into the heater nozzle, (b) is the state after the thermocouple is inserted into the heater nozzle, (c) It is a state after resin is injected into the lead wire accommodating cavity and the stopper recess as the lead wire stopper.

FIG. 5 is a perspective view of a heater tip having two soldering iron parts.

6 is an explanatory view of a heating tip having two soldering iron parts, (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a side view.

A mode for implementing the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2 , the heater nozzle unit 1 includes a plate-shaped heater nozzle 2 for thermocompression bonding of the terminal lead wire A to the terminal member B (refer to FIG. 2( d )). ; And the thermocouple 3 is installed on the heating nozzle 2 as a temperature sensor. The heating nozzle 2 is a nozzle formed by processing a plate of a conductive material (tungsten, molybdenum, superhard material, etc.) by wire electrical discharge machining, and as shown in FIG. The lower part of the heater nozzle 2 (the front end part on the workpiece (terminal lead wire A or the terminal member B) side) and the pair of left and right connecting arm parts 7 form the upper part (base part). Furthermore, when the soldering iron portion 6 is energized to the soldering iron portion 6 through the connection arm portion 7 , the resistance can be used to generate heat, and the temperature of the soldering iron portion 6 can be measured by the thermocouple 3 .

The soldering iron portion 6 includes a horizontally long soldering iron body 11 that connects the lower portions of the connecting arm portions 7 to each other, and the horizontal width of the soldering iron body 11 (the dimension along the horizontal direction in which the pair of connecting arm portions 7 are arranged) is set. It is in a state of gradually narrowing toward the lower part of the heating nozzle 2 . In addition, at the bottom of the soldering iron body 11 protruding slightly downward, a box-shaped soldering iron tip portion 13 is protruded downward, and the bottom surface (tip surface) of the soldering iron tip portion 13 can be brought into contact as a soldering iron tip surface 13a. to terminal wire A. Furthermore, a substantially rectangular soldering iron concave portion 15 is formed in the upper portion (connecting arm portion 7 side) opposite to the soldering iron front end portion 13 of the soldering iron main body 11 , and the soldering iron concave portion 15 is formed in the soldering iron concave A temperature measuring contact (temperature measuring portion) 3 a of the thermocouple 3 is fixed in the portion 15 . In addition, the structure for fixing the temperature measuring contact 3a will be described in detail later.

The connecting arm portions 7 are vertically long components extending upward from the left and right ends of the soldering iron body 11 , and are provided in a state where the connecting arm portions 7 are separated from each other. In addition, in the upper part (extended end part) of the connecting arm part 7 , the installation hole 17 for attaching to the nozzle holder (not shown) of the thermocompression bonding apparatus is configured to penetrate in the plate thickness direction of the heating nozzle 2 , and by screwing the mounting bolt (not shown) passing through the mounting hole 17 to the nozzle holder, the heating nozzle unit 1 is mounted to the nozzle holder with the front end portion 13 of the soldering iron facing downward. device.

In addition, in the nozzle unit 1 attached to the nozzle holder, one connecting arm 7 is electrically connected to one end of a power supply (not shown) for a heater of the thermocompression bonding apparatus, and the other connecting arm 7 Then it is electrically connected to the other end of the power supply for the heater. Furthermore, when a current is passed from a power source (power source for heater) to the heater tip 2, the current flows into the soldering iron body 11 through the connecting arm portion 7, so that the soldering iron body 11 is connected to the soldering iron body 11 by the resistance in the soldering iron body 11. Heat is generated, and the tip portion 13 of the soldering iron is heated up by this heat. In addition, although the current in the soldering iron body 11 flows from the side of one connecting arm portion 7 to the side of the other connecting arm portion 7 , the cross-sectional area of the reduced diameter portion located at the corner of the concave portion 15 of the soldering iron is due to the path through which the current flows. Since the cross-sectional area is narrower than that of other parts, the current density becomes the highest at the reduced diameter part, and Joule heat due to resistance is likely to be generated around this part.

Furthermore, as shown in FIGS. 1 and 2( d ), the heating nozzle 2 is structured such that the heating nozzle 2 is attached to the range from the lower part of the connecting arm part 7 to the soldering iron body 11 on the front and back sides of the heating nozzle 2 . The grooves 20 are each extending in the left-right direction (direction from one connecting arm portion 7 to the other connecting arm portion 7 ) as the grooved portion of the present invention, and are formed thin by the extension of the grooves 20 on the front and back. wall portion 21 , and the tip portion 13 of the soldering iron protrudes below the thin-walled portion 21 . In other words, the thin portion 21 is formed at a position shifted from the tip portion 13 of the soldering iron (specifically, it is closer to the connecting arm portion 7 than the tip portion 13 of the soldering iron).

In addition, as shown in FIG. 2( d ), the depth dimension of the groove 20 on the front and back (the dimension in the thickness direction of the heating nozzle 2 ) is set to be the same, and the connecting arm portion 7 and the soldering iron body 11 (thin-walled) are set to be the same. 21 ) and the center of each thickness direction of the tip 13 of the soldering iron are located on the same plane, and the thickness of the tip 13 of the soldering iron is set to be the same as the thickness of the connecting arm 7 . In addition, the surface of the thin portion 21 serving as the bottom of the groove 20 is set as the side surface (front and back) of the soldering iron body 11, and the thickness of the soldering iron body 11 (thickness of the thin portion 21) is set to be greater than that of the soldering iron body 11. The plate thickness of the connecting arm portion 7 is thinner, and the cross-sectional area of the soldering iron body 11 (in other words, the cross-sectional area serving as a flow path through which current flows) is set smaller than the cross-sectional area of the connecting arm portion 7 . In addition, the thickness t1 of the side surface of the soldering iron body 11 is formed to be larger than the thickness of the connecting arm portion 7 (specifically, the thickness of the connecting arm portion 7 after removing the thin-walled portion 21 (the thickness of the connecting arm portion 7 is the same as the thickness of the connecting arm portion 7). The thickness of the part where the wall portion 21 is shifted)) t2 is thinner (refer to FIG. 1 and FIG. 2(d)).

Next, the configuration of the thermocouple 3 attached to the heater nozzle 2 and the heater nozzle 2 to which the thermocouple 3 is attached will be described.

As shown in FIGS. 1 and 3 , the thermocouple 3 forms a spherical temperature measuring junction (temperature measuring portion) 3 a by welding the tips of two types of core wires 25 to each other, and is covered with an electrically insulating core wire. The respective core wires 25 are covered by the material 26, and the wires 3b are formed by being covered by the outer covering material 27 and bundled into one. In other words, the conducting wire 3 b is constituted so as to include the core wire 25 . In addition, the diameter of the temperature measuring contact 3a and the wire diameter of the lead wire 3b are set to be smaller than the plate thickness of the heating nozzle 2, respectively.

In addition, the heater tip 2 is provided with an accommodation portion for the lead wire 3b in the gap between the connection arm portions 7, and the soldering iron portion 6 is provided with a fixing portion for the temperature measuring contact 3a. Specifically, as shown in Fig. 1 and Fig. 2(a), (b), the gap between the connecting arm portions 7 extending along the longitudinal direction of the connecting arm portion 7 is set to be smaller than the line of the lead wire 3b. The width (thickness, width) of one turn larger in diameter serves as a lead wire accommodating cavity 30 whose upper end portion is open, and in the lead wire accommodating cavity 30, the lead wire 3b does not protrude from the front and back surfaces of the heating nozzle 2 to the outside. In the state where the lead wire 3b (specifically, the portion of the lead wire 3b located close to the temperature measuring contact 3a) is accommodated. Furthermore, the lead wire 3b is extended from the opening 30a of the upper end portion of the lead wire accommodating cavity 30, and the lower end of the wire accommodating cavity 30 is extended to communicate with the soldering iron concave part 15 (see FIG. 1).

Furthermore, in each connecting arm portion 7 , a portion of the side surface facing the wire accommodating cavity 30 is notched, and a blocking recess 31 is formed in a state in which it communicates with the wire accommodating cavity 30 . The stopper recess 31 and a part of the lead-receiving cavity 30 (the part between the stopper recesses 31 ) are provided with the lead stopper 32 so as to be cured by injecting resin such as ultraviolet curing resin or thermosetting resin, and by this The lead wire stopper 32 prevents the lead wire 3 b from being displaced from the lead wire accommodating cavity 30 and protruding from the heater nozzle 2 .

In addition, a portion of the soldering iron recess 15 formed in the soldering iron portion 6 that faces the end (lower end portion) of the lead wire accommodating cavity 30 is provided with a thermocouple 3 in a state of protruding toward the upper connecting arm portion 7 side. The temperature measurement fixing part 35 to which the temperature measurement contact 3a is fixed. As shown in FIG. 3 , the temperature measurement fixing portion 35 is protruded from the protruding portion opposite to the tip portion 13 of the soldering iron across the iron body 11 , and is formed to be smaller than the tip portion 13 of the soldering iron. In addition, a pair of fixed contact surfaces 35a for contacting the temperature measuring contacts 3a are provided in the portion facing the lead wire accommodating cavity 30 side (the upper part of the temperature measurement fixing portion 35) and face the lead wire. The end of the cavity 30 is accommodated, and is set to be fixedly connected A state in which the distance between the contact surfaces 35a gradually widens from the side of the soldering iron portion 6 toward the side of the upper lead-receiving cavity 30 . Furthermore, by forming each of the fixed contact surfaces 35a as flat surfaces, a V-shaped groove 36 is formed on the upper part of the temperature measurement fixing part 35 (the upper part on the side of the wire receiving cavity 30), and is located in the groove. The temperature measuring contact 3a is received in the groove 36 to be in contact with the fixed contact surface 35a, and the temperature measuring contact 3a is fixed to the soldering iron part 6 (temperature measuring fixing part 35) by welding or the like in this state.

Next, the manufacturing procedure of the heater nozzle unit 1 , in particular, the attachment procedure of the thermocouple 3 to the heater nozzle 2 will be described.

First, as shown in FIG. 4( a ), the heater nozzle 2 and the thermocouple 3 that are individually prepared in advance are arranged in a state in which the opening 30 a of the lead wire receiving cavity 30 faces the temperature measuring contact 3 a , and the heater nozzle is set 2 and the posture of the thermocouple 3 are arranged on the same straight line in the order of the temperature measurement fixing part 35 , the lead wire storage cavity 30 , the temperature measurement contact point 3 a , and the lead wire 3 b . When the postures of the heater nozzle 2 and the thermocouple 3 are set, the thermocouple 3 is inserted into the opening 30a of the lead wire storage cavity 30 of the heater nozzle 2 with the temperature measuring contact 3a as the front. Then, the side surface of the connection arm part 7 becomes a guide, and guides the thermocouple 3 to the soldering iron part 6 side.

Furthermore, when the thermocouple 3 is deeply inserted, as shown in FIG. 4( b ), the temperature measuring contact 3 a enters the soldering iron concave portion 15 after passing through the lead wire receiving cavity 30 . Here, as shown in FIG. 3( a ), in the soldering iron portion 6 , a temperature measurement stick is provided at the portion facing the lower end portion (the open end portion on the side of the soldering iron portion 6 ) of the lead-receiving hollow portion 30 . 35, and the V-shaped fixed contact surface 35a is opposite to the end of the wire receiving cavity 30, so the temperature measurement contact 3a entering into the soldering iron recess 15 will reach the temperature measurement fixing part 35 and come into contact (abut against it). contact) to fix the contact surface 35a. In this way, the temperature measurement can be The contact point 3a comes into contact with the fixed contact surface 35a (the temperature measurement fixed portion 35) simply and surely. Therefore, preparation for fixing the temperature measuring contact 3 a to the temperature measuring fixing portion 35 can be smoothly performed.

Furthermore, the lead wire 3b is pressed toward the temperature-measuring fixing portion 35 to maintain the contact of the temperature-measuring contact 3a with the fixing contact surface 35a, and in this state, the temperature-measuring contact 3a and the fixing contact surface 35a are borrowed. It is fixed (welded) by laser welding. Specifically, the fixed contact surface 35a is heated by irradiating a laser beam, and the temperature measuring contact 3a is melted and fixed (welded) by this heat. At this time, as shown in FIG. 3( a ), since the temperature measurement fixing portion 35 is set in a state where the distance between the fixing contact surfaces 35 a gradually expands upward from the side of the soldering iron portion 6 , the The temperature-measuring contact 3 a can be sufficiently contacted with the temperature-measuring fixing portion 35 . Therefore, it is possible to configure the heater nozzle unit 1 which can perform good fixation of the temperature measuring contact 3a to the heater nozzle 2, and can also perform good temperature measurement. In addition, since the fixed contact surface 35a is formed as a flat surface, and the temperature measurement contact 3a is formed as a spherical body, the temperature measurement contact 3a can easily make point contact with the fixed contact surface 35a. In addition, by pressing the temperature measuring contact 3a against the fixed contact surface 35a, stress is easily concentrated and the temperature measuring contact 3a is less likely to float from the fixed contact surface 35a. Thereby, the temperature-measuring contact 3a can be fixed to the heater nozzle 2 more favorably, and the temperature measurement of the heater nozzle 2 can be performed more favorably.

If the temperature measurement contact 3a is fixed to the temperature measurement fixing portion 35, as shown in FIG. The concave portion 31 is filled with resin such as ultraviolet curable resin or thermosetting resin in the state before curing (fluid state), and then resin curing treatment such as ultraviolet irradiation or heating is performed to cure the resin to form the lead stopper 32 .

In the heater nozzle unit 1 constituted by attaching the thermocouple 3 to the heater nozzle 2 in this manner, since the lead wire 3 b of the thermocouple 3 is accommodated in the lead wire accommodating cavity 30 , heat can be avoided. The lead wire 3b of the galvanic couple 3 is beyond the thickness of the heater nozzle 2 . Therefore, it is less likely that the lead wire 3b is accidentally caught, and even the thermocouple 3 is not easily caught in the process of installing the heater nozzle unit 1 to the thermocompression bonding apparatus or the like, or when the heater nozzle unit enters the work area. Defects falling off the heater nozzle. In addition, when a plurality of heater nozzle units 1 are to be integrated at the time of transportation (shipping) or storage, the heater nozzle units 1 can be stacked stably without hindrance, and the transportation operation or storage operation can be performed smoothly.

Furthermore, since the lead wire stopper 32 is provided in the lead wire accommodating cavity 30 , the defect that the accommodated lead wire 3 b falls off from the lead wire accommodating cavity 30 can be prevented. In addition, since the resin injected and hardened into the lead wire accommodating cavity 30 is used as the lead wire stopper 32, the resin can be easily inserted as the lead wire stopper 32 into the gap between the connection arm portion 7 and the lead wire 3b, and sufficient blocking is possible. Stop wire 3b. In addition, since the stopper recess 31 communicated with the lead wire accommodating part 30 is provided, and the resin belonging to the lead wire stopper 32 is injected into the lead wire accommodating part 30 and the stopper recess 31 and hardened, the lead wire stopper 32 is not easily removed from the wire. The wire accommodating hollow portion 30 is removed, and the defect that the wire 3 b can be prevented from falling off from the wire accommodating hollow portion 30 together with the wire stopper portion 32 can be suppressed.

In addition, as an operation for thermocompression bonding of the lead wire A for terminals to the terminal member B using the heater tip unit 1, first, the heater tip unit 1 is attached to the thermocompressor with the tip portion 13 of the soldering iron on the lower side. The nozzle holder of the apparatus was connected, and the lead wire 3b of the thermocouple 3 was connected to a thermocouple connection terminal (not shown) of the thermocompression bonding apparatus. Then, the terminal member B and the lead wire A for terminals are placed in a work area (neither are not shown) provided below the nozzle holder, and the lead wire A for terminals is superimposed on the upper surface of the terminal member B. When the terminal member B and the lead wire A for terminals are already set, the tip unit 1 of the heating tip is lowered together with the nozzle holder, the tip portion 13 of the soldering iron is pressed against the lead wire A for terminals, and the soldering iron is energized by energizing the heating tip 2. The main body 11 generates heat, and the terminal wire A is It is thermocompression-bonded to the terminal member B. In addition, the temperature of the soldering iron portion 6 is measured by the thermocouple 3, and the control portion (not shown) of the thermocompression bonding apparatus controls the energization of the heater tip 2 based on the measured value, and further performs the soldering iron tip portion 13. temperature control.

Here, in the heating nozzle 2 that generates heat, the thickness of the soldering iron body 11 is set to be thinner than the thickness of the connecting arm portion 7 , and the cross-sectional area of the soldering iron body 11 is set to be thinner than the cross-sectional area of the connecting arm portion 7 . Since the area is smaller, even if the thickness of the heater nozzle 2 is set to be thick, the defect that the current density in the soldering iron body 11 decreases and the heat generation becomes insufficient can be suppressed. Therefore, regardless of the increase or decrease of the plate thickness of the heater nozzle 2, it is easy to realize good heat generation efficiency. In addition, an increase in the volume of the soldering iron body 11 can be avoided, thereby avoiding an increase in the heat capacity, and the cooling of the soldering iron body 11 or the front end portion 13 of the soldering iron can be easily performed quickly. Furthermore, the thin portion 21 is formed by extending the groove 20 from the lower part of the connecting arm portion 7 to the range of the soldering iron body 11 , and the surface of the thin portion 21 serving as the bottom of the groove 20 is set as the side surface of the soldering iron body 11 . Therefore, the structure of the heating nozzle 2 in which the thickness of the soldering iron body 11 is thinner than that of the connecting arm portion 7 can be easily realized.

In addition, since the tip portion 13 of the soldering iron is protruded below the thin-walled portion 21, when a foreign matter (insulation coating of the lead wire A for terminals, etc.) adheres to the tip portion 13 of the soldering iron due to the thermocompression bonding operation, it is easy to Foreign matter is removed by grinding the front end of the tip portion 13 of the soldering iron or the like. Furthermore, the grinding margin of the tip end of the tip end portion 13 of the soldering iron can be sufficiently ensured, and the replacement cycle (service life) of the heater nozzle unit can be prolonged. Furthermore, since the thin-walled portion 21 is formed on the side of the connecting arm portion 7 rather than the tip portion 13 of the soldering iron, and the thickness of the side surface of the soldering iron body 11 is formed to be larger than the thickness of the connecting arm portion 7 after removing the thin-walled portion 21 . Since it is thin, the reduction of the current density in the soldering iron body 11 can be suppressed, and at the same time, the dimension in the plate thickness direction in the front end face of the front end portion 13 of the soldering iron can be sufficiently ensured. In this way, the allowable size of the workpiece (the object to be thermocompressed) that can be thermocompressed by the heating nozzle 2 can be increased. scope. In addition, since the thin portion 21 is formed at a position shifted from the tip portion 13 of the soldering iron, and the thickness of the tip portion 13 of the soldering iron is set to be the same as the thickness of the connecting arm portion 7, it is not necessary to make the thickness of the tip portion 13 of the soldering iron different from the thickness of the tip portion 13 of the soldering iron. The heating nozzle 2 can be easily manufactured by increasing or decreasing the thickness of the connecting arm portion 7 .

Furthermore, since the centers of the respective thickness directions of the connecting arm portion 7, the soldering iron body 11, and the soldering iron tip portion 13 are located on the same plane, it is difficult to generate a bending moment in the heating tip 2 during the thermocompression bonding operation, which can prevent the heating tip from being damaged. 2. The defect of applying an excessive load can further suppress the defect that the heater nozzle 2 is easily damaged. Furthermore, since the thermocouple 3 is installed on the soldering iron portion 6 of the heating tip 2 as a temperature sensor, the information of the temperature of the soldering iron portion 6 can be obtained and applied to the control of the heat generation of the heating tip 2 . In addition, the temperature sensor can be realized by a simple configuration.

However, in the above-mentioned embodiment, the soldering iron body 11 is constituted by extending the grooves 20 to the front and back sides of the heating nozzle 2 to form the thin-walled portions 21 , but the present invention is not limited to this. In short, as long as the thickness of the soldering iron body 11 is set to be thinner than the thickness of the connecting arm portion 7, and the cross-sectional area of the soldering iron body 11 is set to be smaller than the cross-sectional area of the connecting arm portion 7, the heating tip 2 Any shape of the soldering iron body 11 can be provided. For example, the soldering iron body 11 may be constituted by extending the groove to either the front surface or the back surface of the heater nozzle 2 to form the thin portion 21 . However, the soldering iron body 11 will be biased against either side of the front and back of the heating nozzle 2, thus, a bending moment will be generated in the heating nozzle 2 during the thermocompression bonding operation, so the connecting arm 7, the soldering iron body 11, The structure in which the center of each thickness direction of the tip portion 13 of the soldering iron is located on the same plane, that is, the structure of the above-mentioned embodiment is preferable. In addition, the soldering iron main body 11 should just have the structure which includes the part with the highest resistance (the part which becomes a heat generating part). Therefore, the area to be thinned by means of grooves or the like may be within the connecting arm portion 7 , and may not necessarily be the entire area of the soldering iron body 11 .

In addition, although the plate thickness of the tip portion 13 of the soldering iron and the plate thickness of the connecting arm portion 7 are set to the same dimension, the present invention is not limited to this. For example, by reducing the thickness of the tip portion 13 of the soldering iron and setting it to be thinner than the thickness of the connecting arm portion 7, the degree of freedom of the thickness dimension of the tip portion 13 of the soldering iron can be increased, and the design can be easily performed corresponding to the thermocompression bonding process. The heating nozzle 2 is the size of the workpiece (terminal member B, terminal lead wire A). In addition, as shown in FIG. 3, although the temperature measurement fixing|fixed part 35 is comprised so that the whole is smaller than the tip part 13 of the soldering iron, this invention is not limited to this. For example, as long as the volume of the tip portion 13 of the soldering iron and the volume of the temperature-measurement fixing portion 35 are set to be the same so as to avoid the extreme difference between the heat capacity of the tip portion 13 of the soldering iron and the heat capacity of the temperature-measurement fixing portion 35, the The temperature change at the thermometric fixing portion 35 is synchronized with the temperature change at the tip portion 13 of the soldering iron, and it is easy to perform temperature management of the tip portion 13 of the soldering iron based on the temperature measurement of the fixing portion 35 .

In addition, although the fixing contact surface 35a of the temperature measurement fixing|fixed part 35 is comprised as a flat surface, this invention is not limited to this. In short, the fixed contact surfaces 35a may be formed with a curved surface as long as the distance between the fixed contact surfaces 35a gradually expands upward from the soldering iron portion 6 side. In addition, as long as the temperature measuring contact (temperature measuring part) 3a can be sufficiently contacted with the fixed contact surface 35a, the temperature measuring contact 3a is not limited to be formed into a spherical body, and may be formed in any shape. In addition, although the temperature measurement contact point 3a of the thermocouple 3 and the temperature measurement fixing|fixed part 35 are welded and fixed, this invention is not limited to this. In short, as long as the temperature measurement of the soldering iron part 6 can be performed, the fixed state of the temperature measurement contact 3 a and the temperature measurement fixing part 35 is not limited. For example, an adhesive (adhesive) having good thermal conductivity may be used to fix the temperature measurement contact 3 a and the temperature measurement fixing portion 35 .

In addition, in the heater nozzle 2 of the said embodiment, although the wire-accommodating hollow part 30 is comprised so that it may extend linearly along the longitudinal direction of the connection arm part 7, this invention is not limited to this. In short, any aspect can be applied as long as it is a configuration capable of accommodating the lead wire 3b of the thermocouple 3 The lead wire receiving empty part 30 . For example, the lead wire accommodating cavity 30 extending in a bent line shape or a bent line shape can be applied. In addition, although resin, such as an ultraviolet curable resin and a thermosetting resin, was illustrated as the lead wire stopper 32 in this invention, this invention is not limited to this. In short, the shape of the lead wire stopper 32 is not limited as long as the lead wire 3 b accommodated in the lead wire accommodating cavity 30 can be stopped and prevented from falling out of the lead wire accommodating cavity 30 . For example, a cap that can be fitted into the lead wire accommodating cavity 30 may be used as the lead wire stopper, or a protrusion that is integrally formed on the connecting arm portion 7 and protrudes toward the lead wire accommodating cavity 30 may be used as the lead wire stopper. Wire stop.

In addition, although the stopper concave portion 31 communicated with the wire accommodating cavity 30 is formed by the shallow cutout on the side surface of the wire accommodating cavity 30 , the present invention is not limited to this. In short, as long as the resin belonging to the lead wire stopper 32 is injected from the lead wire accommodating cavity 30 to the stopper recess 31 and can be hardened, any configuration of the stopper recess 31 can be adopted. For example, groove-shaped stopper recesses may be formed on the front and back sides of the connecting arm portion 7, respectively, and the ends of the stopper recesses may be communicated with the lead wire accommodating portion 30, and the resin (lead stopper portion 32) may be formed. ) is injected from the wire accommodating cavity 30 to the stopper recess.

Furthermore, in the above-mentioned embodiment, the thermocouple 3 is exemplified as the temperature sensor of the present invention, and the temperature measuring junction 3a of the thermocouple 3 is exemplified as the temperature measuring portion of the present invention, but it is not limited to this. . In short, as long as the temperature of the soldering iron part 6 can be measured, and the end of the lead wire 3b is provided with a temperature sensor composed of a temperature measurement part, any temperature sensor can be used and attached to the heating nozzle 2 .

However, in the said embodiment, although the groove|channel 20 was illustrated as the gouging part of this invention, this invention is not limited to this. In short, as long as the thin-walled portion is formed as a heating nozzle by extending the gouge portion in the direction from the one connecting arm portion toward the other connecting arm portion, the heating nozzle can be The grooving portion is set to any state. For example, the heating nozzle 2 ″ of the second embodiment shown in FIG. 5 and FIG. 6 is basically the same as the above-mentioned embodiment (the first embodiment), but the difference is: not only in the The front and back sides of the heating nozzle 2" also form a planing part in the middle part of the heating nozzle 2' in the plate thickness direction, so that the lower half of the heating nozzle 2' branches into two branches, thereby having two soldering iron bodies.

Specifically, the heating nozzle 2' is attached to the middle part of the soldering iron part 6' located in the lower part of the heating nozzle 2' in the plate thickness direction, and is formed along the left-right direction (from the connecting arm part 7 on one side to the other side). The soldering iron space portion 40 extending in the direction of the connection arm portion 7) serves as a grooved portion, and the soldering iron space portion 40 is opened downward. Furthermore, a soldering iron main body 11 and a soldering iron front end portion 13 are respectively provided on both sides of the front and back of the heating tip 2' across the soldering iron space portion 40. In other words, the soldering iron portion 6' of the heater tip 2' includes two soldering iron bodies 11 that are spaced apart from each other, and two soldering iron tip portions 13 that are spaced apart from each other. Furthermore, in each soldering iron body 11, grooves 20 are formed on the outer surface, and grooves 20' are also formed on the inner surface. In addition, there are soldering iron concave portions 15 on which temperature measuring fixing portions 35 are protruded. Each temperature-measuring fixing portion 35 can fix the temperature-measuring junction (temperature-measuring portion) 3a of the thermocouple 3, and in each soldering iron tip portion 13, the plate thickness of the soldering iron tip portion 13 is set to be larger than that of the connecting arm portion. 7 is thinner.

As long as the heater tip 2' provided with the soldering iron portion 6' is constructed as described above, the two soldering iron tip portions 13 can simultaneously perform the thermocompression bonding process at two locations, and the efficiency of the thermocompression bonding operation can be improved. In addition, by setting the dimension of the soldering iron space 40 in the thickness direction, the separation distance (spacing) of the two soldering iron front ends 13 or the size of the soldering iron front end surface 13a of each soldering iron front end 13 can be adjusted according to the workpiece.

In addition, in the aforementioned embodiment, an oxidation resistance coating layer may be formed on the surface of the heater nozzle to improve oxidation resistance.

The oxidation-resistant coating layer will be described below.

In the heater tip, since the temperature rises and cools repeatedly for each thermocompression bonding, the surface is easily oxidized, especially in the vicinity of the soldering iron part 6 (heating part) and the part where the thermocouple 3 is welded. As a result, the oxidized portion near the heat generating portion peels off to reduce the strength, resulting in a defect that it is broken during pressurization, and the welded portion of the thermocouple corrodes to reduce the strength, and eventually the thermocouple becomes unusable due to detachment, etc. Defects.

Therefore, in the present embodiment, the oxidation resistance is improved by forming the oxidation resistance coating layer on the surface of the heater nozzle. Hereinafter, it demonstrates concretely including a manufacturing process.

first. As for the metal plate used as a material (base material), specifically, it is preferable to use tungsten (hardness of about HV430) generally used in the past and so-called superhard, which is more excellent in abrasion resistance than tungsten alloy (hardness of about HV200 to 400). material (hardness HV900 to 2400) (official name: super hard alloy, an alloy formed by sintering hard metal carbide powder), and the plate of this super hard material is cut out into a predetermined shape by wire cutting. Next, this cut-out piece is subjected to a pre-plating treatment, and after that, it is immersed in a dissolution tank and energized, whereby an oxidation-resistant coating layer made of nickel is formed on the surface of the cut-out piece, that is, nickel plating is applied. cover. After that, it is pulled up from the dissolution tank to perform post-processing such as washing.

Furthermore, as in the above-mentioned embodiment, the temperature measuring contact 3a of the thermocouple 3 is welded to the temperature measuring fixing portion 35 by laser welding. In this welding, since the coating of the nickel layer is formed on the surface (fixed contact surface 35a) of the temperature-measuring fixing portion 35, the wettability is improved, thereby enhancing the reliability of welding and the welding strength. In addition, when the wettability during welding is improved, the output of the laser can be suppressed more than the conventional one, and the damage to the substrate can be suppressed, and the improvement of quality and the saving of energy consumption can be achieved.

When the welding of the thermocouple 3 is completed, the pre-plating treatment is further performed, and the heating nozzle unit 1 equipped with the thermocouple 3 is immersed in the electrolyte. Nickel plating is applied to the surface.

When the nozzle unit 1 fabricated in this way is used, the oxidation resistance is improved, so that peeling or strength reduction due to oxidation of the soldering iron portion 6 or the mounting portion of the thermocouple 3 can be suppressed, and thereby the durability can be improved. Sexual enhancement. In particular, when a superhard material is used as the base material and nickel plating is performed, both the wettability and the weldability can be improved, and the durability can be surely improved. In addition, since the main component of the thermocouple is nickel, the nickel plating affinity is good. In addition, the oxidation-resistant coating is not limited to nickel plating, and may be, for example, gold plating or the like.

In addition, all the viewpoints of the above-mentioned embodiment are examples, and should not be construed as limiting the present invention. The present invention is not limited to the above description, but should be shown in the scope of the patent application, and all modifications within the meaning and scope equivalent to the scope of the patent application are included.

1: Heating nozzle unit

2: Heating nozzle

3: Thermocouple

3a: Temperature measuring contact

3b: Wire

6: Soldering Iron Department

7: Connect the arm

11: Soldering iron body

13: The front end of the soldering iron

13a: Front end of soldering iron

15: Soldering iron recess

20: Ditch

21: Thin-walled part

25: core wire

26: Core wire covering material

27: Outer cladding material

30: Wire storage empty part

35: Temperature measurement fixing part

35a: Fixed contact surface

36: Groove

Claims (6)

A heater nozzle unit, the heater nozzle unit is obtained by attaching a temperature sensor to a plate-shaped heater nozzle for thermally crimping a lead wire for a terminal to a terminal member, The aforementioned heating nozzle system has: The soldering iron portion is provided on the soldering iron body with the front end portion of the soldering iron abutting against the lead wire for the terminal; a pair of connecting arm portions extending from the left and right ends of the soldering iron body to be separated from each other upwards, and allowing current from a power source to flow through the soldering iron body to heat the soldering iron portion; and The temperature-measuring fixing part is arranged on the above-mentioned soldering iron part, and is used for fixing the temperature-measuring part of the temperature sensor, The temperature measurement fixing part includes a pair of fixing contact surfaces with which the temperature measuring part comes into contact, and is set in a state where the distance between the fixing contact surfaces gradually widens upward from the soldering iron part side. The nozzle unit according to claim 1, wherein the fixed contact surface is formed as a flat surface, and the temperature measurement portion is formed as a spherical body. The nozzle unit according to claim 2, wherein the lead wire of the temperature sensor is accommodated in the lead wire accommodating void by using the gap between the connecting arm portions as the lead wire accommodating void, And the said fixed contact surface is made to face the edge part of the lead-receiving hollow part. The heater tip unit according to any one of claims 1 to 3, wherein the heater tip has an oxidation-resistant coating layer formed on at least the surfaces of the soldering iron portion and the temperature-measurement fixing portion. The heater nozzle unit according to claim 4, wherein an oxidation-resistant coating layer is formed on the surface of the temperature measurement portion fixed to the temperature measurement fixing portion. The nozzle unit according to claim 4 or 5, wherein the oxidation-resistant coating layer is a nickel coating.

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