WO2016157946A1

WO2016157946A1 - Device and method for manufacturing flow volume control device

Info

Publication number: WO2016157946A1
Application number: PCT/JP2016/051495
Authority: WO
Inventors: 鈴木将之
Original assignee: 株式会社ケーヒン
Priority date: 2015-03-30
Filing date: 2016-01-20
Publication date: 2016-10-06
Also published as: JP2016188634A; JP6453692B2

Abstract

In a manufacturing device (80) for a flow volume control device (10), a cylinder rod (86) of a cylinder (88) is used to press together a first casing (24) and a second casing (28), and a wire rod (54) is made to generate heat, thereby welding together the inner wall of an engaging groove (52) and an engaging protrusion (40). A load cell (100) detects a load applied to the first casing (24) and the second casing (28), and a load current detection sensor (119a) detects the value of a load current flowing in a cylinder motor (85). On the basis of the load or the load current value, a controller (118) controls the pressing operation of the cylinder (88) with respect to the first casing (24) and second casing (28) when the inner wall of the engaging groove (52) and the engaging protrusion (40) are welded together.

Description

Manufacturing apparatus and manufacturing method of flow control device

The present invention relates to a manufacturing apparatus and a manufacturing method for a flow rate control device having a first casing that houses an operation source and a second casing that houses a control valve that is operated by the operation source.

Air is supplied to the combustion chamber of the internal combustion engine mounted on the automobile. Here, the supply amount of air, in other words, the flow rate of air toward the combustion chamber is controlled so that the combustion in the combustion chamber is maintained in a suitable state. This flow control is performed by a flow control device.

As this type of flow control device, one described in Japanese Patent No. 4555822 is known. Briefly describing this prior art, the flow control device includes a first casing that houses an operation source such as a motor, and a first valve that operates by the operation source and controls the opening degree of the air flow passage. 2 casings. The first casing and the second casing are connected by bolts.

When connecting the first casing and the second casing with a bolt, a mounting plate is externally fitted to the first casing. That is, in the above-described prior art, the number of parts is increased by the amount of bolts and mounting plates required. Furthermore, since the operation | work which twists a volt | bolt is required, it is complicated, and it is not easy to improve work efficiency.

Therefore, the applicant of the present invention relates to a case in which both the first casing and the second casing are made of a resin composition containing at least a thermoplastic resin, and a heat-generating wire is inserted into either the first casing or the second casing. An engaging groove is formed on one of the remaining parts of the second casing or the first casing, and the inner wall of the engaging groove and the engaging protrusion are welded to each other. Therefore, a technique for joining the first casing and the second casing is proposed.

In this case, the elastic member such as a spring is used to heat the wire while the first casing is pressed against the second casing, thereby melting the inner wall of the engagement groove and the engagement convex portion. The inner wall of the groove is welded to the engaging projection.

However, when the inner wall of the engagement groove and the engagement protrusion melt, the molten resin flows, and the load applied to the first casing and the second casing from the elastic means is reduced. That is, the elastic means only presses the first casing and the second casing, and cannot adjust the load. Therefore, it becomes difficult to press the first casing and the second casing with an appropriate load to weld the inner wall of the engagement groove and the engagement convex portion.

The present invention has been made to solve the above-described problem, and presses the first casing and the second casing with an appropriate load to stably weld the inner wall of the engagement groove and the engagement convex portion. It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method for a flow rate control device that can be used.

The present invention relates to a manufacturing apparatus and a manufacturing apparatus for a flow rate control device having a first casing that houses an operating source, and a second casing that houses a control valve that operates by the operating source and controls the opening of a fluid flow path. Regarding the method. In the flow control device, an engagement groove in which a heat-generating wire is inserted is formed in either the first casing or the second casing containing resin, and the second casing or the first casing is formed. One of the remaining portions is provided with an engaging convex portion that enters the engaging groove.

In this case, in order to achieve the above-described object, the flow rate control device manufacturing apparatus according to the present invention includes a cylinder, a heat generation unit, a state detection unit, and a control unit. In the state where the wire is inserted into the engagement groove, the cylinder presses the first casing relative to the second casing to cause the engagement protrusion to enter the engagement groove. The heat generating means causes the wire to generate heat and welds the inner wall of the engagement groove and the engagement protrusion to each other to join the first casing and the second casing. The state detection means detects the state of the resin on the inner wall of the engagement groove and the engagement protrusion. The control means performs a pressing operation of the cylinder against the first casing and the second casing when welding the inner wall of the engagement groove and the engagement convex portion based on the detection result of the state detection means. Control.

In order to achieve the above object, the method for manufacturing a flow control device according to the present invention includes first to third steps. In the first step, in a state where the wire is inserted into the engagement groove, the cylinder is pressed against the second casing relative to the second casing by the cylinder to cause the engagement protrusion to enter the engagement groove. In the second step, the wire is heated to melt the inner wall of the engagement groove and the engagement protrusion. In the third step, the state detection means detects the resin state on the inner wall of the engagement groove and the engagement protrusion, and based on the detection result of the state detection means, the engagement groove inner wall and the engagement groove The pressing operation of the cylinder against the first casing and the second casing at the time of welding the joint convex portion is controlled by the control means.

Thus, in the present invention, the first casing and the first casing when welding the inner wall of the engagement groove and the engagement convex portion based on the detection result (the state of the resin) of the state detection means. 2) The pressing operation of the cylinder against the casing is controlled. Accordingly, the first casing and the second casing are pressed with an appropriate load according to the state of the resin (for example, the melting speed of the resin), and the inner wall of the engagement groove and the engagement convex portion are It becomes possible to make it weld stably. As a result, the quality of the flow control device can be improved.

Specifically, the state detection means is a load detection sensor that detects a load applied from the cylinder to the first casing and the second casing, or a load of a load current that flows to the cylinder motor when the cylinder is driven. A load current detection sensor for detecting a current value is included. Here, when the load detection sensor detects a decrease in the load accompanying the melting of the resin in the inner wall of the engagement groove and the engagement projection, or a decrease in the load current value is detected in the load current detection sensor. If detected, the control means may press the cylinder at a predetermined pressing speed. Thereby, an appropriate load according to the melting rate of the resin can be set.

It is a schematic side sectional view of a flow control device manufactured by a manufacturing apparatus and a manufacturing method according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, showing a state in which the first casing and the second casing are close to each other as softening of the engaging protrusions and the like proceeds from FIG. 3. It is a schematic block diagram of the manufacturing apparatus which concerns on embodiment of this invention. It is a flowchart which shows operation | movement (manufacturing method) of the manufacturing apparatus which concerns on embodiment of this invention. It is a timing chart which shows the time passage of the load for every pressing speed at the time of welding of the 1st casing and the 2nd casing. It is a timing chart which shows the time passage of the load and welding current value at the time of welding of the 1st casing and the 2nd casing.

Hereinafter, preferred embodiments of a manufacturing apparatus and a manufacturing method of a flow control device according to the present invention will be described in detail with reference to the accompanying drawings.

Here, prior to the description of the manufacturing apparatus and manufacturing method of the flow control device according to the present embodiment (hereinafter also referred to as the manufacturing apparatus and manufacturing method according to the present embodiment), the flow control device is manufactured by the manufacturing apparatus and manufacturing method. The flow control device 10 will be described with reference to FIGS.

As shown in the schematic side sectional view of FIG. 1, the flow rate control device 10 is provided in, for example, an internal combustion engine (not shown) of a motorcycle, and the flow rate of air supplied to the internal combustion engine, that is, so-called intake air flow. Control.

The flow control device 10 is attached to the internal combustion engine via a throttle body 12. An outline of the throttle body 12 will be described. The throttle body 12 is formed with an intake passage 14 communicating with an intake port of the internal combustion engine. A throttle valve 16 is installed in the intake passage 14 so as to be openable and closable. In addition, a bypass forward path 18 and a bypass return path 20 are formed in the throttle body 12. The bypass forward path 18 is connected to the intake passage 14 upstream of the throttle valve 16, and the bypass return path 20 is connected to the intake passage 14 downstream of the throttle valve 16.

The flow control device 10 includes a first casing 24 that houses a motor 22 as an operation source, and a second casing 28 that is connected (joined) to the first casing 24 and houses a control valve 26. The flow control device 10 is positioned and fixed by attaching the second casing 28 to the throttle body 12.

The first casing 24 includes a coupler portion 32 that houses the power supply terminal 30, a substantially cylindrical main body portion 34 that is continuous with the coupler portion 32, and a first flange portion 36 that has a slightly larger diameter than the main body portion 34. And integrally. That is, the 1st casing 24 consists of a single member.

A bottomed first motor housing hole 38 is formed in the main body 34 so as to be depressed. Almost half of the motor body of the motor 22 is fitted into the first motor housing hole 38. The motor 22 is electrically connected to the power supply terminal 30.

An annular engagement convex portion 40 is formed on the end surface of the first flange portion 36 facing the second casing 28 so as to be directed toward the second casing 28. As will be described later, the engaging convex portion 40 serves to connect (join) the first casing 24 and the second casing 28.

On the other hand, the second casing 28 includes a second flange portion 42 that faces the first flange portion 36, a valve housing portion 48 in which a second motor housing hole 44 and a sliding hole 46 are formed, and the valve housing. A mounting portion 50 that is provided at the end of the portion 48 and is mounted on the throttle body 12 is integrally provided. That is, the second casing 28 is also composed of a single member.

An annular engagement groove 52 is formed on the end surface of the second flange portion 42 facing the first flange portion 36 at a position corresponding to the position of the engagement convex portion 40. As shown in FIG. 2, which is a cross-sectional view taken along the line II-II in FIG. 1, the engaging groove 52 accommodates a wire 54 that functions as a heating wire. Further, the engaging convex portion 40 enters the engaging groove 52 (see FIG. 1).

The outer wall of the engaging projection 40 and the inner wall (at least one of the two side walls or the bottom wall) of the engaging groove 52 are integrated with each other by welding. By this welding, the first casing 24 and the second casing 28 are joined (connected). The space between the wire 54 and the bottom wall or the two side walls of the engagement groove 52 is filled with a cured product of a resin composition such as PBT (Poly Butylene Terephtalate) softened during welding. In other words, no gap is recognized between the wire 54 and the engagement convex portion 40 or the engagement groove 52.

In the vicinity of the engaging convex portion 40, a step portion 56 (see FIGS. 3 and 4) is formed. As will be described later, the end surface of the first flange portion 36 abuts on the stepped portion 56 during welding.

As shown in FIG. 2, the wire 54 includes an annular portion 58 that is curved so that predetermined portions of one metal wire (for example, a copper wire or a stainless steel wire) are separated from each other, and a radial direction from the annular portion 58. It has the 1st electrode contact part 60 and the 2nd electrode contact part 62 which protruded outward. The first electrode contact portion 60 and the second electrode contact portion 62 are separated from each other by approximately 180 °.

The first electrode abutting portion 60 is configured by converging the longitudinal ends of the wire 54, while the second electrode abutting portion 62 folds an intermediate portion of the wire 54 to form an annular portion. It is configured by forming two linearly shaped portions from 58 in the diametrically outward direction.

As shown in FIGS. 2 to 4,

ribs

64a and 64b are formed to protrude from the first flange portion 36, and

ribs

64c and 64d are formed to protrude from the second flange portion. An insertion hole 66a is formed through the

ribs

64a and 64c, while an insertion hole 66b is formed through the

ribs

64b and 64d. The first electrode contact portion 60 of the wire 54 is exposed in the insertion hole 66a, and the second electrode contact portion 62 is exposed in the insertion hole 66b.

Returning to FIG. 1, the second motor housing hole 44 houses the motor body together with the first motor housing hole 38. Here, a seal member 68 made of rubber and having a disk shape is interposed between the second motor housing hole 44 and the sliding hole 46. The seal member 68 divides the second motor accommodation hole 44 and the sliding hole 46.

A through hole is formed in the seal member 68. The rotating shaft 70 of the motor 22 protrudes into the sliding hole 46 through this through hole. A screw part is engraved at the tip of the rotating shaft 70, and a slider 72 is screwed into the screw part. As a result, the slider 72 is fitted on the rotary shaft 70. Note that the rotation shaft 70 can selectively perform either forward rotation or reverse rotation.

The control valve 26 is a hollow body, and the slider 72 is housed inside the hollow of the control valve 26 while being inserted into the coil spring 74. The control valve 26 has a bottom wall 26a formed with a U-shaped groove at its longitudinal end. One end of the coil spring 74 having a large diameter is seated on the bottom wall 26a. On the other hand, the other end with the small diameter is seated on the large diameter portion 72 a of the slider 72.

In the mounting portion 50, an inlet communication path 76 for communicating the bypass forward path 18 and the sliding hole 46 and an outlet communication path 78 for communicating the sliding hole 46 and the bypass return path 20 are formed. Bypass bypass 18, inlet communication path 76, sliding hole 46, outlet communication path 78, and bypass return path 20 form a bypass path that bypasses throttle valve 16.

A manufacturing apparatus 80 and a manufacturing method according to the present embodiment for manufacturing the flow rate control apparatus 10 configured as described above will be described with reference to FIGS. Here, the flow control device 10 will be described with reference to FIGS.

The manufacturing apparatus 80 according to the present embodiment includes a support base 82 that supports the second casing 28 of the flow control apparatus 10 as schematically shown in FIG. The support base 82 includes a base 82a, a plurality of support posts 82b standing from the base 82a, and a support plate 82c fixed to the upper end of each support post 82b. An insertion hole 82d penetrating in the vertical direction is formed at substantially the center of the support plate 82c. In this case, the second casing 28 is supported by the support base 82 by inserting the valve accommodating portion 48 through the insertion hole 82d and placing the second flange portion 42 on the upper surface of the support plate 82c.

A pressing mechanism 84 that presses the main body 34 of the first casing 24 from above is provided above the first casing 24 connected to the second casing 28. The pressing mechanism 84 includes a cylinder 88 such as an electric cylinder that drives the cylinder motor 85 to move the cylinder rod 86 forward and backward with respect to the main body 34.

The cylinder rod 86 is inserted through an insertion hole 92 penetrating in the vertical direction substantially at the center of the plate 90. The distal end portion 94 of the cylinder rod 86 is configured as a plate member having a larger diameter than the cylinder rod 86. The plate 90 is supported by a support plate 98 via a plurality of support columns 96, and a load cell (load detection sensor, state detection means) 100 is fixed on the upper surface of the support plate 98 so as to face the plate 90. . The load cell 100 detects the pressing force (load) when the cylinder rod 86 advances downward and the tip end portion 94 presses the load cell 100. A pressing plate 104 is connected to the bottom surface of the support plate 98 via a plurality of support columns 102.

Here, when the cylinder motor 85 of the cylinder 88 is driven and the cylinder rod 86 advances downward and the tip end portion 94 presses the load cell 100, the support plate 98 for fixing the load cell 100, the

respective columns

96 and 102, and the plate 90. And the pressing plate 104 is displaced downward integrally. As a result, the pressing plate 104 can press (press) the main body 34 of the first casing 24 from above. Accordingly, the load cell 100 detects the pressing force from the tip end portion 94 of the cylinder rod 86, that is, the load acting on the first casing 24 and the second casing 28 from the pressing mechanism 84 via the main body portion 34.

On the other hand, when the cylinder motor 85 of the cylinder 88 is driven and the cylinder rod 86 is retracted upward, the first casing 24 is released from the pressed state by the pressing plate 104. In this case, when the cylinder rod 86 is retracted upward and the tip end portion 94 comes into contact with the bottom surface of the plate 90, the plate 90, the

respective columns

96 and 102, the support plate 98, and the pressing plate 104 are integrally moved upward. It is displaced to. As a result, the pressing plate 104 is separated from the main body 34 of the first casing 24.

Insulating receiving

pins

110a and 110b are inserted into the

insertion holes

66a and 66b shown in FIGS. 2 to 4, respectively, and

electrode tips

112a and 112b are inserted (see FIGS. 3 to 5). That is, the receiving electrode 110a and the electrode tip 112a sandwich the first electrode contact portion 60 from above and below, while the receiving pin 110b and the electrode tip 112b sandwich the second electrode contact portion 62 from above and below.

In addition, the manufacturing apparatus 80 according to the present embodiment includes a PLC 116 and a controller 118 that constitute the control unit 114, a motor driver 119 that drives the cylinder motor 85 of the cylinder 88, and a current value of a load current that flows through the cylinder motor 85 ( A load current detection sensor (state detection means) 119a for detecting a load current value), a welding power source 120 for energizing the wire 54 via the

electrode tips

112a and 112b, and a weld flowing to the wire 54 via the

electrode tips

112a and 112b. It further has a welding current detection sensor 122 that detects a current value (welding current value) of the current.

PLC 116 controls controller 118. The controller 118 receives the control command from the PLC 116 and controls the entire manufacturing apparatus 80 by controlling the cylinder 88 and the welding power source 120. That is, the controller 118 starts driving control of the cylinder 88 by controlling the motor driver 119 and driving the cylinder motor 85 based on the control signal from the PLC 116. On the other hand, the welding power source 120 energizes the wire 54 via the

electrode tips

112a and 112b based on a control signal from the controller 118. Therefore, the welding power source 120 and the

electrode tips

112a and 112b constitute a heating means 124 that energizes the wire 54 to generate heat.

In addition, the controller 118 detects the load or load current detected by the load cell 100 after starting to press the main casing 34 of the first casing 24 by driving the cylinder 88 and starting to energize the wire 54 from the welding power source 120. Based on the load current value detected by the detection sensor 119a, the pressing operation from the cylinder 88 to the main body 34 can be controlled.

Next, the operation (manufacturing method) of the manufacturing apparatus 80 according to the present embodiment will be described with reference to FIGS.

In this case, first, the rotating shaft 70 of the motor 22 is passed through the through hole of the seal member 68, and the control valve 26 is assembled to the screw portion exposed from the through hole via the slider 72 and the coil spring 74. Next, the motor body of the motor 22 is inserted into the first motor housing hole 38, while the control valve 26 is inserted into the sliding hole 46 through the second motor housing hole 44. Further, the first flange portion 36 and the second flange portion 42 are brought close to each other, and the engaging convex portion 40 is inserted into the engaging groove 52.

The wire 54 is deformed into the shape shown in FIG. In this case, the distal end wall of the engaging convex portion 40 is in contact with the wire 54, and at this time, the end surface of the first flange portion 36 is not in contact with the top surface of the stepped portion 56. A predetermined clearance is formed. In this state, when the valve accommodating portion 48 of the second casing 28 is inserted into the insertion hole 82d, the second flange portion 42 is placed on the upper surface of the support plate 82c, so that the first casing 24 and the second casing 28 are moved. It can be supported by the support base 82.

Next, the insulating receiving

pins

110a and 110b are inserted into the

insertion holes

66a and 66b, and the

electrode tips

112a and 112b are inserted. That is, the receiving electrode 110a and the electrode tip 112a sandwich the first electrode contact portion 60 from above and below, while the receiving pin 110b and the electrode tip 112b sandwich the second electrode contact portion 62 from above and below.

After making the above preparations, the processing shown in the flowchart of FIG. 6 is executed. That is, in step S1 of FIG. 6, first, the pressing speed and the load current limit value are preset in the controller 118. At that time, the pressing speed is set to a predetermined pressing speed (for example, x [mm / s]) using a timing chart of FIG. The load current limit value is set to a predetermined value as the upper limit of the load current.

In the next step S <b> 2 (first step), the PLC 116 outputs a control signal instructing the start of the pressing operation to the first casing 24 to the controller 118. The controller 118 drives the motor driver 119 based on the input control signal, and the motor driver 119 drives and controls the cylinder motor 85 to drive the cylinder 88. Accordingly, the cylinder rod 86 is directed downward toward the first casing 24 at a predetermined pressing speed.

When the distal end portion 94 of the cylinder rod 86 comes into contact with the load cell 100 and presses the load cell 100, the load cell 100 detects the pressing force from the distal end portion 94 and outputs a detection signal corresponding to the detected pressing force to the controller 118. To do. When the cylinder rod 86 further presses the load cell 100 via the distal end portion 94, the load cell 100, the support plate 98, the

columns

96 and 102, the plate 90, and the pressing plate 104 are integrally lowered by the pressing force.

As a result, when the bottom surface of the pressing plate 104 contacts the main body 34 of the first casing 24, the first casing 24 and the second casing 28 are pressed against the support plate 82c of the support table 82 by the pressing force. That is, the first casing 24 and the second casing 28 receive a load from the pressing mechanism 84. Therefore, when the first casing 24 and the second casing 28 are pressed by the pressing plate 104, the load cell 100 can output a detection signal corresponding to the pressing force to the controller 118.

The controller 118 has, for example, a magnitude of a pressing force (load) according to a detection signal from the load cell 100 such that the magnitude of a predetermined load when the pressing mechanism 84 presses the first casing 24 and the second casing 28. If it is determined, the process proceeds to the next step S3.

In step S3, the controller 118 outputs a control signal for starting energization to the wire 54 to the welding power source 120. Based on the input control signal, the welding power source 120 energizes the electrode tip 112a through the wire 54 so that a welding current flows from the electrode tip 112b to the electrode tip 112b.

As a result, in step S4, the wire 54 generates heat due to the energization. The portions of the wire 54 other than the first electrode contact portion 60 and the second electrode contact portion 62 are in contact with at least the bottom wall of the engagement groove 52 and the tip wall of the engagement protrusion 40. Therefore, the heat from the wire 54 is transmitted to each wall portion of the engagement groove 52 and the engagement convex portion 40, and both the wall portions of the engagement groove 52 and the outer wall portion of the engagement convex portion 40 are transmitted. As the temperature rises, the wall (resin composition) softens and becomes flowable.

By driving the cylinder motor 85 of the cylinder 88, the cylinder rod 86 advances at a predetermined pressing speed, and the first casing 24 and the second casing 28 receive a load from the pressing plate 104. Therefore, the first casing 24 is pushed into the second casing 28, and the engagement protrusion 40 further enters the engagement groove 52 as shown in FIG. 3. Since each wall part of the engaging convex part 40 and the engaging groove 52 is softened, this approach is easy. The softened resin composition flows and surrounds the wire 54. In addition, said step S3, S4 comprises a 2nd step.

In step S5, the controller 118 monitors the presence or absence of a decrease in load detected by the load cell 100 or the presence or absence of a decrease in load current value detected by the load current detection sensor 119a. When a decrease in load or load current value is detected (step S5: YES), in the next step S6, the controller 118 sends a control signal for causing the first casing 24 to perform a further pressing operation to the motor driver 119. Output.

That is, when the resin composition is softened and starts to flow, the pressing mechanism 84 melts the softened resin composition even if it intends to push the first casing 24 toward the second casing 28 with the same load. Depending on the case, the first casing 24 is pushed in quickly. Thereby, the load which acts on the 1st casing 24 and the 2nd casing 28 will fall. As a result, compared to before the resin composition is softened, the load received by the first casing 24 and the second casing 28 is reduced, the load current value is also reduced, and each wall of the engagement groove 52 is appropriately loaded. It becomes impossible to weld a part and the engagement convex part 40. FIG.

Therefore, if the controller 118 monitors the decrease in the load or load current value reflecting the state of the molten resin composition and detects that the decrease in the load or the load current value has occurred, an appropriate load can be obtained. The cylinder motor 85 of the cylinder 88 is driven and controlled by controlling the motor driver 119 so as to return to (to maintain a constant load).

Specifically, when the load or the load current value is reduced, the controller 118 controls the motor driver 119 so as to increase the pressing force to drive and control the cylinder motor 85 of the cylinder 88. Thereby, the cylinder rod 86 further proceeds toward the first casing 24. As a result, the first casing 24 is further pushed into the second casing 28 side, and the load received by the first casing 24 and the second casing 28 increases (returns) (step S7). As the load increases, the value of the load current flowing through the cylinder motor 85 of the cylinder 88 also increases.

In step S8, the controller 118 monitors whether or not the load current value detected by the load current detection sensor 119a has increased to the load current limit value. In this case, when it is detected that the load current value has increased to the load current limit value (step S8: YES), the controller 118 stops the pressing operation on the first casing 24 in the next step S9. Therefore, the motor driver 119 is controlled.

That is, if the pressing operation is continued in a state where the load current value exceeds the load current limit value, flow of the resin composition occurs more than necessary, and each wall portion of the engagement groove 52 and the engagement convex portion 40 are appropriately connected. It is because it becomes impossible to weld to. As a result, in step S <b> 10, the progress of the cylinder rod 86 is stopped by stopping the driving of the cylinder motor 85 by stopping the motor driver 119. The above steps S5 to S10 constitute the third step.

In the next step S11, the controller 118 determines whether or not the welding of each wall portion of the engagement groove 52 and the engagement convex portion 40 has been completed. Specifically, when the engagement convex portion 40 enters the engagement groove 52, the end surface of the first flange portion 36 comes into contact with the top surface of the step portion 56, the first flange portion 36 is dammed, and the engagement It is determined whether or not the joint protrusion 40 is prevented from further entering the engagement groove 52.

If the welding has not been completed (step S11: NO), the process returns to step S4, and the processes of steps S4 to S10 are repeated. However, in the second and subsequent steps S4 to S10, in step S6, the controller 118 controls the motor driver 119 to resume the driving of the cylinder motor 85 of the cylinder 88 and the first casing by the cylinder rod 86. 24 and the second casing 28 are pressed again.

On the other hand, when it is confirmed in step S11 that the above welding has been completed (step S11: YES), the controller 118 controls the welding power source 120 to stop energization of the wire 54. Thereby, the heat generation of the wire 54 is completed, and the softened and fluidized resin composition is cured. By this curing, the first casing 24 and the second casing 28 are joined and integrated.

Next, in order to release the first casing 24 from the pressed state, the controller 118 controls the motor driver 119 to drive the cylinder motor 85 of the cylinder 88 and retract the cylinder rod 86 upward. When the distal end portion 94 of the cylinder rod 86 comes into contact with the plate 90, the plate 90, the

respective columns

96 and 102, the support plate 98, and the pressing plate 104 are integrally moved upward, and the pressing plate 104 is moved to the first casing 24. Separated from the main body 34. Thereby, the 1st casing 24 and the 2nd casing 28 are released from a pressing state. Thereafter, the receiving

pins

110a and 110b and the

electrode tips

112a and 112b are taken out from the

insertion holes

66a and 66b, respectively.

FIG. 7 is a timing chart illustrating a temporal change in load for each pressing speed (x [mm / s] to 9 x [mm / s]) of the cylinder rod 86 from the time when the resin composition starts to melt. is there.

In this case, after the resin composition is melted, the load decreases from the value immediately before melting as time elapses. Therefore, the controller 118 drives the cylinder motor 85 of the cylinder 88 under the control of the motor driver 119 to increase the pressing force as in the processing of steps S4 to S11 in FIG. By repeatedly starting and stopping the progress of the cylinder rod 86 with respect to the casing 24, welding can be appropriately performed while maintaining a constant load so that the load does not decrease from the value immediately before melting. . In FIG. 7, the load repeatedly moves up and down as time passes. This is because the process of steps S4 to S11 in FIG. 6 is repeated to drive and stop the cylinder 88 (the cylinder rod 86). This is because the reduction and return of the load are repeated by repeatedly performing (start and stop of the progress).

Further, as shown in FIG. 7, the larger the moving speed (pressing speed) of the cylinder rod 86, the larger the drop of the load after melting, so that the pressing speed is as low as possible (for example, x [mm / s]). It is desirable to repeatedly start or stop the progress of the cylinder rod 86.

Furthermore, since the melting rate of the resin composition varies depending on various conditions such as the material of the resin composition and the magnitude of the load, the controller 118 sets the pressing speed according to the above conditions, A load current limit value may be set.

FIG. 8 is a timing chart showing the passage of time between the load received by the first casing 24 and the second casing 28 until the welding is completed and the welding current value flowing through the wire 54. In FIG. 8, energization of the wire 54 is started at time t0, and a welding current having a substantially constant value is allowed to flow in time zones t0 to t1 and t1 to t2, respectively, and then the energization is stopped at time t2. In this case, the welding current value decreases in the order of the time periods t0 to t1 and t1 to t2. Even in this case, the process of steps S4 to S11 in FIG. 6 is repeatedly performed, so that the cylinder 88 is repeatedly driven and stopped, and the load is repeatedly lowered and returned, whereby the load repeatedly moves up and down over time. To do.

As described above, according to the present embodiment, the controller 118 of the control means 114 is configured so that the load received by the first casing 24 and the second casing 28 reflecting the state of the resin composition, or the cylinder motor 85 of the cylinder 88. The pressing operation of the cylinder 88 against the first casing 24 and the second casing 28 when welding the inner wall of the engagement groove 52 and the engagement convex portion 40 is controlled based on the load current value flowing through the cylinder. Thus, the first casing 24 and the second casing 28 are pressed with an appropriate load according to the state of the resin composition (for example, the melting rate of the resin composition), and the inner wall of the engagement groove 52 and the engagement convex portion 40 are Can be stably welded. As a result, the quality of the flow control device 10 can be improved.

In this case, the load cell 100 detects the load applied to the first casing 24 and the second casing 28 from the cylinder rod 86, or the load current detection sensor 119a flows to the cylinder motor 85 when the cylinder 88 is driven. Detects the load current value. As a result, if the controller 118 detects a decrease in the load or load current value accompanying the melting of the resin composition on the inner wall of the engagement groove 52 and the engagement projection 40, the operation of pressing the cylinder rod 86 at a predetermined pressing speed. Can be performed. Thereby, the suitable load according to the melting rate of the resin composition can be set.

Further, according to the present embodiment, the following effects can also be obtained. That is, in the present embodiment, the first casing 24 and the second casing 28 can be integrated without using bolts or mounting plates. Therefore, it is possible to reduce the number of parts constituting the flow control device 10. Moreover, the complicated operation | work which twists a volt | bolt becomes unnecessary. Moreover, the time required from the start of heat generation of the wire 54 to the end of joining is shorter than the time required for screwing the bolt. For this reason, there also exists an advantage that work efficiency improves.

In the flow control device 10 configured in this way, the control valve 26 moves under the control action of an engine control unit (ECU) (not shown) electrically connected to the power feeding terminal 30 in FIG. Thus, the opening degree of the outlet communication passage 78 is adjusted. That is, when the throttle valve 16 is fully closed, the ECU moves the control valve 26 based on the information related to the operating state of the internal combustion engine so that the outlet communication path 78 has an appropriate opening degree.

Specifically, the ECU rotates the rotation shaft 70 by, for example, a predetermined amount in the forward rotation direction by controlling the amount of power supplied to the motor 22 via the power supply terminal 30. The rotational driving force at this time is converted into a driving force for linear motion of the control valve 26 via the slider 72. Therefore, for example, the control valve 26 in the sliding hole 46 is displaced from the position shown in FIG. 1 to the outlet communication passage 78 side. At this time, the control valve 26 is in sliding contact with the inner wall of the sliding hole 46.

The opening of the outlet communication passage 78 is closed to a predetermined degree by the displaced control valve 26. As a result, the opening degree of the outlet communication passage 78 is adjusted. That is, the control valve 26 controls the opening degree of the bypass passage that is a flow passage of air (intake air) that is a fluid.

The air (intake air) introduced into the intake passage 14 enters the slide hole 46 from the bypass outward passage 18 via the inlet communication passage 76, and returns to the intake passage 14 from the outlet communication passage 78 through the bypass return passage 20. As described above, even when the throttle valve 16 is in the fully closed state, the intake air is returned to the intake passage 14 through the inside of the flow control device 10, that is, the bypass passage. Of course, the intake air flowing through the bypass passage is controlled to a flow rate corresponding to the opening degree of the outlet communication passage 78.

When it is necessary to increase the flow rate of the intake air, the ECU rotates the rotating shaft 70 of the motor 22 by, for example, a predetermined amount in the reverse rotation direction. Following this, the control valve 26 returns to the position shown in FIG. 1 while sliding on the inner wall of the sliding hole 46. As a result, the opening of the outlet communication passage 78 is fully opened.

In the above operation, sufficient airtightness is maintained between the first casing 24 and the second casing 28. This is because the occurrence of poor welding between the engagement groove 52 and the engagement projection 40 is avoided as described above.

The present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, contrary to the above, the engaging groove 52 is formed in the first flange portion 36 of the first casing 24 and the engaging convex portion 40 is provided in the second flange portion 42 of the second casing 28. Good.

In the above embodiment, the case where the pressing mechanism 84 presses the main body 34 of the first casing 24 has been described. If the pressing mechanism 84 can press the first casing 24 relative to the second casing 28, the above effects can be easily obtained. Therefore, in the present embodiment, even if the manufacturing apparatus 80 is configured such that the pressing mechanism 84 presses the second casing 28 against the first casing 24, the above-described effects can be obtained.

Claims

A first casing (24) containing an operation source (22) and a first control valve (26) which operates by the operation source (22) and controls the opening degree of the fluid flow passages (18, 20). A production device (80) for a flow control device (10) having two casings (28),
The flow control device (10) includes an engagement groove (52) in which a heat-generating wire (54) is inserted into either the first casing (24) or the second casing (28) containing resin. Is formed, and one of the remaining portions of the second casing (28) or the first casing (24) is provided with an engaging protrusion (40) that enters the engaging groove (52),
The manufacturing apparatus (80)
With the wire (54) inserted into the engagement groove (52), the first casing (24) is pressed against the second casing (28) relatively to the engagement groove (52). A cylinder (88) for allowing the joint (40) to enter,
The first casing (24) and the second casing (28) are formed by causing the wire (54) to generate heat and welding the inner wall of the engagement groove (52) and the engagement protrusion (40) to each other. And a heating means (124) for bonding
State detection means (100, 119a) for detecting the state of the resin in the inner wall of the engagement groove (52) and the engagement protrusion (40);
Based on the detection result of the state detection means (100, 119a), the first casing (24) and the first casing when the inner wall of the engagement groove (52) and the engagement protrusion (40) are welded together. Control means (114) for controlling the pressing operation of the cylinder (88) against the two casings (28);
An apparatus (80) for manufacturing a flow rate control device (10), comprising:
In the manufacturing apparatus (80) of the flow control device (10) according to claim 1,
The state detection means (100, 119a) includes a load detection sensor (100) for detecting a load applied from the cylinder (88) to the first casing (24) and the second casing (28), or the cylinder ( 88) includes a load current detection sensor (119a) that detects a load current value of a load current flowing through the cylinder motor (85) when driving,
When the load detection sensor (100) detects a decrease in the load accompanying the melting of the resin in the inner wall of the engagement groove (52) and the engagement protrusion (40), or a decrease in the load current value Is detected by the load current detection sensor (119a), the control means (114) presses the cylinder (88) at a predetermined pressing speed to produce the flow rate control device (10). (80).
A first casing (24) containing an operation source (22) and a first control valve (26) which operates by the operation source (22) and controls the opening degree of the fluid flow passages (18, 20). A flow rate control device (10) having two casings (28), comprising:
The flow control device (10) includes an engagement groove (52) in which a heat-generating wire (54) is inserted into either the first casing (24) or the second casing (28) containing resin. Is formed, and one of the remaining portions of the second casing (28) or the first casing (24) is provided with an engaging protrusion (40) that enters the engaging groove (52),
The manufacturing method includes:
With the wire (54) inserted into the engagement groove (52), the cylinder (88) presses the first casing (24) against the second casing (28) relatively to the engagement groove ( 52) a first step (S2) for causing the engaging projection (40) to enter;
A second step (S3, S4) for causing the wire (54) to generate heat and melting the inner wall of the engagement groove (52) and the engagement protrusion (40);
The state detection means (100, 119a) detects the state of the resin on the inner wall of the engagement groove (52) and the engagement protrusion (40), and based on the detection result of the state detection means (100, 119a). The pressing operation of the cylinder (88) against the first casing (24) and the second casing (28) when welding the inner wall of the engaging groove (52) and the engaging projection (40). A third step (S5 to S10) controlled by the control means (114);
A method of manufacturing a flow rate control device (10), comprising: