JP6064853B2 - Joining method and joining apparatus - Google Patents

Description

  The present invention relates to a method and an apparatus for assembling a separate workpiece component part to a workpiece body and accurately joining an assembly location by fillet joining or the like.

  FIG. 11 shows a conventional high-pressure fuel pump 100 for a vehicle, in which a fuel passage, a mounting hole, and the like are provided in a body housing 101 integrally formed by casting, and a suction valve portion 102, a discharge valve portion 103, a damper portion 104, Components such as the plunger portion 105 are assembled and the opening edge portions ((1) to (3) in the figure) are joined and sealed. In joining, it can join by welding etc. on the basis of the main body housing 101 which has a highly accurate cutting surface. For example, as shown in FIG. 12A, the reference component A is chucked and the component B is arranged coaxially, and the laser welding head 106 is rotated to face the welded portion where the components A and B are stacked. While welding. In this case, since the high-accuracy cutting products are joined to each other and the positional accuracy on the basis of rotation (chuck) is high, the positional deviation between the head and the welded portion during laser welding is small.

  In the conventional product, high molding accuracy is required for each part in order to ensure the bonding quality, which is a factor that increases the product cost. Therefore, in order to reduce the product cost, it has been studied to manufacture the main body of the injection pump using an inexpensive sheet metal. For example, as shown in FIG. 12B, when the part C is assembled to the sheet metal housing 107, since a clearance is formed between the mounting hole of the housing 107 and the part C, a welding ring 108 is interposed. It is conceivable to join the fillets at both ends.

  In addition, regarding a method for connecting a plurality of parts with high accuracy, Patent Document 1 includes an alignment member that is unevenly fitted to the body, and an assembly of the body and the alignment member is fixed to the housing. A method of coaxially assembling a plurality of parts via an assembly is disclosed. This method is a method of simply connecting parts without joining them, and is intended for a structure in which a housing has a reference surface.

JP 2002-243980 A

  However, sheet metal parts have low molding accuracy and it is difficult to guarantee accuracy when they are joined. For example, in the configuration shown in FIG. 12B, since the housing 107 and the welding ring 108 are both low-precision press products and the welding ring 108 is a separate part, positioning during welding is not easy. For this reason, the deflection with respect to the rotation (chuck) reference becomes large, and the welding position deviation may exceed the allowable value. In fillet joining, the accuracy of this welding position is important. For example, if the laser irradiation position is displaced inward, a recess that becomes a water pool is likely to cause corrosion, and if it is displaced outward, the joining width cannot be secured. This leads to a decrease in bonding strength.

    Therefore, the present invention has an allowable range of positional deviation by reducing the deflection of the joint even when the workpiece does not have a high-precision reference surface and the low-precision parts are joined using a joining ring or the like. It is an object of the present invention to provide a bonding method and a bonding apparatus capable of obtaining a high-quality and low-cost product.

In order to solve the above problem, the invention according to claim 1 of the present invention provides:
A method for assembling a workpiece constituent part to a joining cylinder part provided on a work body, and joining an outer peripheral surface of the work constituent part to an inner peripheral surface of the joining cylinder part,
A work holding part having a reference jig is arranged above a work support part for floatingly supporting the work receiving jig so that it can be moved horizontally and tilted, and the joining cylinder part is connected to the reference jig and the work receiving jig. A process of placing the workpiece so as to face each other;
A step of relatively moving the work support portion in the direction of the reference jig, pressing the joining tube portion against the reference jig, and following the workpiece body;
Locking the work body in a copying posture while locking the pressing member inserted from above into the reference jig at a position where it abuts the work component;
The reference jig is retracted to a position where it does not come into contact with the joining cylinder part, and the joining cylinder part and the work component are joined in a state where the work is held between the pressing member and the work receiving jig. Process.

In the invention according to claim 2 of the present invention, the joining cylinder part is provided separately from the work body,
After the workpiece body is locked in a copying posture, the joining cylinder portion is joined to the workpiece body prior to the operation of the pressing member.

According to a third aspect of the present invention, there is provided an apparatus for assembling a work component part to a joining cylinder part provided on a work body and joining an outer peripheral surface of the work component part to an inner peripheral surface of the joining cylinder part. Because
A workpiece having a workpiece receiving jig on which the workpiece is placed with the joining tube portion as the upper surface side, a floating mechanism that supports the workpiece receiving jig so as to be horizontally movable and tiltable, and a copying mechanism that can be locked in an arbitrary posture. A support part;
A work holding part having a holding member that is disposed above the work support part so as to be opposed to the joining tube part and is inserted into the reference jig so as to be vertically movable and lockable at an arbitrary position;
A workpiece clamp mechanism that moves the workpiece support portion relative to the reference jig direction, presses the joining tube portion against the reference jig, and causes the workpiece body to follow the workpiece;
A holding mechanism capable of switching the position of the reference jig between a work clamp position capable of contacting the joining tube portion and a retracted position;
In a state in which the workpiece is held between the pressing member and the workpiece receiving jig, the reference jig is switched to a retracted position, and a joining means is provided for joining the joining cylinder portion and the workpiece component.

  According to a fourth aspect of the present invention, there is provided a rotation mechanism for rotating the workpiece held between the workpiece support portion and the workpiece pressing portion at the time of joining.

  The invention according to claim 5 of the present invention is provided with a drive mechanism with a lock that drives the reference member in the axial direction of the reference jig having a cylindrical shape and locks it in a predetermined position. Prior to switching the tool to the retracted position, the pressing member is driven to abut against the workpiece component and locked at that position.

  In the joining method according to the present invention, a reference jig serving as a position reference at the time of joining is provided, the joining cylinder portion of the work that is a joined part is brought into contact, and the work body is moved to position the work. The workpiece receiving jig on which the workpiece body is placed is floating supported by the workpiece supporting part and can be displaced in any direction. If the joining tube part is displaced so as to follow the contact surface with the reference jig, Along with this, the workpiece main body easily follows, and the position is adjusted with respect to the reference jig. Therefore, after locking so as to maintain this copying posture, and further pressing the workpiece component with the pressing member, the reference jig is retracted from the joining tube portion. As a result, it is possible to open the part to be joined while maintaining the workpiece posture and to join the workpiece component. Specifically, like the joining device of the present invention, a copying mechanism is provided in the workpiece support portion, the workpiece is positioned using the workpiece clamping mechanism, and the reference jig can be switched using the pressing mechanism. As a result, it is possible to easily perform accurate bonding.

  Therefore, according to the present invention, it is not necessary for the work body to have a high-precision cutting surface, and high bonding position accuracy can be secured by positioning with respect to the reference jig, so that inexpensive sheet metal parts are used. Thus, a high quality and low cost product can be obtained.

It is a perspective view which shows the principal part structure of the joining apparatus in 1st Embodiment of this invention. It is a side view of the joining device of a 1st embodiment. It is a perspective view for demonstrating operation | movement of the joining apparatus of 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall cross-sectional view of a high-pressure fuel pump to be joined according to the present invention and a partially enlarged view thereof. It is an exploded view and a top view of a high pressure fuel pump. It is an expanded side view of the work clamp mechanism which is the principal part of a joining apparatus. It is a partial expanded sectional view for demonstrating the ring pressing jig operation | movement which comprises the principal part of a joining apparatus. It is an enlarged side view of the copying mechanism that constitutes the main part of the joining apparatus. It is an enlarged side view. It is the expanded sectional view of the lock cylinder mechanism which comprises the principal part of a joining apparatus, and its partial expanded sectional view. It is a partial expanded sectional view for demonstrating the action | operation of the lock cylinder mechanism which comprises the principal part of a joining apparatus. It is a principal part expanded sectional view of a joining apparatus. It is a principal part schematic diagram for demonstrating the joining process by the joining apparatus of 1st Embodiment. It is a principal part schematic diagram for demonstrating the joining process by the joining apparatus of 1st Embodiment. It is the schematic for demonstrating the action | operation of the workpiece | work clamp mechanism and ring pressing mechanism of a joining apparatus. It is a schematic diagram for demonstrating an example of the copying conditions by the copying mechanism of a joining apparatus. It is a schematic diagram for demonstrating the action | operation of the lock cylinder mechanism of a joining apparatus. It is a schematic sectional drawing which shows the conventional fuel pump structure. It is a schematic diagram for demonstrating the joining method between the conventional high precision components. It is a schematic diagram for demonstrating the subject at the time of joining between low precision components.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a main part structure of a joining apparatus 1 for carrying out the joining method of the present invention. A work support part 2 having a work receiving jig 21 sandwiching a work W to be joined, and a reference jig. A workpiece pressing portion 3 having a ring pressing jig 31 and a pressing pin 32 (see FIG. 1B) as a pressing member is disposed facing the vertical direction of the drawing. A rotating mechanism 11 that rotates the workpiece W at the time of joining is disposed on the side. The top plate T to which the work holding unit 3 is attached is fixed to the upper end of the leg B1 standing on the base B, and the movable plate M to which the work support unit 2 is attached between the top plate T and the base B. Is arranged to be movable up and down.

  The workpiece W to which the joining method of the present invention is applied is, for example, a high-pressure fuel pump P for an automobile engine shown in FIG. 2, and a relatively inexpensive sheet metal processed product is used for the workpiece body. A separate workpiece component that is a member to be joined is joined and fixed by welding or the like via a joining cylinder provided on the workpiece body. FIG. 1B is an example in which a machining head L for laser welding is arranged as a joining means, and the known machining head L is held by a robot or the like (not shown) so that a predetermined part of the workpiece W can be irradiated with laser. . As shown in FIG. 1C, the rotating mechanism 11 has a rotating shaft 12 that penetrates the movable plate M and extends in the vertical direction, and its upper end is connected to a rotating motor 13 installed on the top plate T so as to be freely rotatable. I support it. The rotary shaft 12 rotates the work pressing portion 3 around the reference axis via gears 14 and 15 disposed on the top surface of the top plate T, and via gears 16 and 17 disposed on the bottom surface of the movable plate M. Then, the workpiece support 2 is rotated synchronously.

  In FIG. 2A, the high-pressure fuel pump P targeted in the present embodiment includes a pump main body P1 that is a work main body formed of an assembly of a plurality of parts, and a work structure in mounting holes P2 and P3 provided in the pump main body P1. As parts, a connector part C and a discharge valve part V, which are shaft-like parts separate from the pump body P1, are mounted. The connector part C forms part of the suction valve part, and connects the suction valve V1 accommodated in the mounting hole P2 and the coil part C1 connected to an external power source. A pressurizing chamber P4 is formed in the pump body P1, and a needle member accommodated in the cylindrical body of the connector C opens and closes the suction valve V1, and the fuel sucked into the pressurizing chamber P4 is positioned below. The pressure is applied by the reciprocating motion of the plunger P5. The pressurized fuel is discharged from the discharge valve portion V to an external high-pressure passage (not shown). Above the pressure chamber P4, a vibration absorbing damper part P6 is formed.

  In FIG. 2B, the pump body P1 is welded to a flange member H2 that is attached from below to a pump-like head H1 that is coaxially formed with mounting holes P2 and P3, covering a container-like housing H that is closed from the top to the top. Etc. to form an integral assembly. The housing H is a press-molded product by sheet metal processing, and mounting holes H3 and H4 that abut against the mounting holes P2 and P3 of the pump head H1 are formed through therethrough at positions facing the cylindrical wall. A part of the suction valve V1 and the connector part C is accommodated in the mounting hole P2 of the assembled pump body P1, and the ring member R, which is a joined cylinder part, is fitted into the outer periphery of the connector part C (FIG. 2A). The ring member R is a press-formed product having an L-shaped cross section, and has a cylindrical portion R1 welded to the outer periphery of the connector portion C and an annular flange portion R2 welded to the peripheral portion of the mounting hole H3 of the housing H. Both edge portions are fillet joined by laser irradiation. A similar ring member R is also arranged in the mounting hole P3 at the end edge, the end of the cylindrical portion R1 is the outer peripheral surface of the discharge valve portion V, and the peripheral edge of the annular flange portion R2 is the mounting hole H4 of the housing H. It is welded at two places as well as the peripheral portion.

  As described above, in the present embodiment, a configuration in which the ring member R for welding is separately provided and laser welding is performed at two positions on both ends of the ring member R will be described. However, the present invention is not necessarily limited to this configuration. is not. For example, the workpiece main body may have a shape having a joining cylinder portion integral with the housing H or a shape in which the joining cylinder portion is previously provided in the housing H in a separate process. Is one place of the joining cylinder part and the workpiece component.

  In such a combined structure, a certain amount of clearance is required between the housing H and the ring member R, the connector portion C, and the discharge valve portion V, and an angle shift is likely to occur. Conventionally, chucking is performed with reference to a high-precision machined part in the vicinity of the joint, and welding is performed while rotating. However, in the pump body P1 of the present embodiment, the ring member R and the housing H are both low-precision. It is a press product, and the deflection (positional deviation) due to rotation tends to increase. Therefore, in the present invention, a reference jig serving as a position reference is provided, the ring member R interposed for joining is brought into contact, and the position of the pump body P1 is adjusted by following the housing H. Furthermore, a mechanism that enables welding while maintaining this copying posture is provided so that the welding position accuracy is ensured even when there is no high-precision machined part serving as a rotation reference.

  In FIG. 1A, the joining apparatus 1 has a work clamp mechanism 4 that clamps the work W by moving the work support part 2 toward the work pressing part 3. The work clamp mechanism 4 is installed on the base B by inserting guide cylinders M1 provided at the four corners of the substantially rectangular movable plate M through the four support legs B1 connecting the base B and the top plate T. The workpiece support unit 2 can be moved up and down integrally with the movable plate M by the clamp actuator 41. The workpiece support unit 2 includes a copying mechanism 22 that causes the workpiece W to follow the ring pressing jig 31 during clamping.

  The work pressing part 3 includes a ring pressing mechanism 5 (pressing mechanism) for switching the position of a ring pressing jig 31 having a reference surface at the tip between a clamp position and a retracted position, and a pressing pin 32 at the time of joining. And a lock cylinder mechanism (a drive mechanism with a lock) 6 that is held in contact with the cylinder. The ring pressing mechanism 5 supports the ring pressing jig 31 so as to be rotatable between the tips of a pair of support arm portions 51 installed below the top plate T. A pressing actuator 52 is attached to the base end side of the pair of support arm portions 51 so that the cylindrical ring pressing jig 31 can be operated in the vertical direction (axial direction). Here, the lower end position is set as a clamping position where the workpiece W can be clamped, and the upper end position is set as a retracted position where the workpiece W is opened. However, the stop position can be set appropriately according to the workpiece W. it can. The actuators 41 and 52 are constituted by, for example, a known air cylinder. Of course, for example, a servo motor or other system may be used.

  FIG. 3A shows a state in which the workpiece W is clamped between the ring pressing jig 31 and the workpiece support 2, and the workpiece W (pump P) is placed on the workpiece receiving jig 21 arranged on the copying mechanism 22. The connector portion C to be joined is placed so as to be positioned on the upper surface side. The workpiece receiving jig 21 has the upper surfaces of the pair of leg portions as receiving surfaces inclined along the lower surface shape of the pump body P1 (FIG. 1B), and the discharge valve portion V located on the lower surface side of the pump body P1 It is held between a pair of legs of the jig 21. The ring pressing jig 31 is in the lower position (clamping position) shown in the left diagram of FIG. 3B, and when the pump P is raised together with the work support portion 2, the ring member R on the outer periphery of the connector portion C is moved to the pressing jig 31. Pressed against. Accordingly, the pump main body P1 performs a copying operation by the copying mechanism 22. At this clamp position, the ring member R is welded to the pump body P1, and the ring pressing jig 31 is switched to the upper position (retracted position) shown in the right diagram of FIG.

  The copying mechanism 22 shown in FIG. 4 is supported in a floating manner so that the air floating movable portion can be horizontally moved and tilted, and the posture of the pump body P1 is adjusted at the time of clamping and locked in an arbitrary posture by an air suction type locking mechanism. To do. Here, the θ floating unit 23 for adjusting the tilt angle with respect to the vertical axis is stacked on the XY floating unit 24 for adjusting the position in the horizontal direction, and the θ direction (angle copying) and the XY direction (center copying) are used. ). The θ floating unit 23 is swingable on a support base 26 having a spherical concave surface 26a with the upper surface of the base 25 on which the workpiece receiving jig 21 is placed being a flat surface and the lower surface being a spherical convex surface 25a. Be placed. A spherical air ejection portion (not shown) is interposed between the convex surface 25a and the concave surface 26a, and the air introduced from the outside is ejected from the air ejection hole to float the base 25. In the XY floating unit 24, a movable plate 27 on which the θ floating unit 23 is placed is arranged on a support base 28 so as to be horizontally movable, and air introduced from the outside to an air ejection portion 28a arranged on the lower surface side is movable. The plate 27 is raised. The air ejection part is made of a porous body having a predetermined thickness, and a large number of small holes communicating with the inside and outside form an air ejection hole.

  Thus, it is preferable that the copying mechanism 22 is an air floating type because the movable portion and the pump main body P1 are not in contact with each other and the frictional force can be almost zero. At the time of locking, the introduction of air is stopped and discharged to the outside, and the inside is set to a negative pressure, whereby the base 25 and the movable plate 27 can be sucked and fixed at that position. Driving air is introduced through a rotary joint 29 attached below the movable plate M in FIG. 1A. Of course, the scanning mechanism 22 to be fixed is not limited to the air floating type as long as the frictional force can be made sufficiently small, but other types may be used. For example, it is possible to adopt a steel ball type configuration in which a movable part is slid and displaced using a large number of steel balls made of a metal material having a small friction coefficient.

  5A and 5B, the lock cylinder mechanism 6 includes an air cylinder mechanism 62 that drives a cylinder rod 62a integral with the pressing pin 32 in an axial direction in a cylindrical housing 61, and a lock mechanism that locks the rod 62a at a predetermined position. 63. The lock mechanism 63 switches the position between a locked state (FIG. 5A) in which the pressing member 64 disposed around the rod 62a clamps the rod 62a by the spring force of the spring 64a and an open state (FIG. 5B). A taper ring 65 and a return spring 65a are disposed on the outer periphery of the rod 62a, and the taper ring 65 can be moved in the axial direction by air application to release the lock.

  As shown in FIG. 6, the pressing pin 32 is inserted into the tube of the ring pressing jig 31 from above and faces the connector portion C located in the lower end portion of the ring pressing jig 31. In this state, when the holding pin 32 is lowered by the air cylinder mechanism 62 and the lock mechanism 63 is operated at a position where the holding pin 32 is in contact with the upper end of the connector C, the holding pin 32 and the workpiece support are maintained while maintaining the posture of the workpiece W. It can be supported between the parts 2. Driving air is introduced through a rotary joint 66 that is mounted above the top plate T in FIG. 1A.

  Next, the joining method using the joining apparatus 1 having the above-described configuration will be described in the order of steps with reference to FIGS. In the process shown in the left diagram of FIG. 7, first, the pump body P1 assembled as shown in FIG. 2B is placed on the work receiving jig 21 of the work support portion 2 with the mounting hole P2 side as the upper surface, and assembled to the mounting hole P2. The upper end portion of the connector portion C is inserted into the ring pressing jig 31 of the workpiece pressing portion 3. At this time, the upper end surface of the ring member R extrapolated to the connector portion C faces the lower end surface serving as the reference surface of the ring pressing jig 31, and the pressing pin of the lock cylinder mechanism 6 is connected to the upper end surface of the connector portion C. 32 are located opposite to each other (setting step). 7 and 8 show a part of the configuration of the bonding apparatus 1 in a simplified manner. In addition, a ring member for welding the discharge valve portion V to the mounting hole P3 side of the pump body P1 is not shown.

  In the subsequent process, the workpiece support portion 2 is raised toward the workpiece pressing portion 3 using the workpiece clamp mechanism 4 from this state. Then, as shown in the right diagram of FIG. 7, the ring member R is brought into contact with the ring pressing jig 31 to perform a copying operation (a copying process). The copying apparatus 22 introduces air into the θ floating unit 23 and the XY floating unit 24 so that the base 25 and the movable plate 27 can be freely displaced. At this time, the ring pressing jig 31 does not necessarily have to contact the entire circumference of the ring member R. However, as shown in the left diagram of FIG. An annular horizontal surface 31a serving as a reference surface and a cylindrical wall surface 31b perpendicular to the notch may be configured to abut on the upper end surface and the outer peripheral end surface of the ring member R, and the upper end edge of the ring member R from the outside. The chuck is easily positioned. That is, the position of the ring member R is adjusted so that the ring member R follows the ring pressing jig 31 and the axis of the ring member R coincides with the ring pressing jig 31. At the same time, the ring member R is pressed against the housing H, the annular flange portion R2 and the peripheral portion of the mounting hole H3 of the housing H are brought into close contact with each other, and the entire pump body P1 performs a copying operation on the ring member R.

Here, as shown in the left diagram of FIG. 7, if Fa is the lifting force by the workpiece clamping mechanism 4 and Fb is the weight of the entire movable part including the workpiece W and the workpiece support portion 2, The ring member R can be pressed against the ring pressing jig 31 by lifting W. At this time, the reaction force of the lifting force is applied to the ring pressing jig 31. The clamping force F by the ring pressing jig 31 is
F = Fa-Fb
(Fa> Fb)
Thus, by appropriately setting the clamping force F, the copying operation of the pump body P1 can be facilitated. Specifically, when the total weight Fb lifted by the work clamp mechanism 4 is about 130N, for example, if Fa is in the range of about 130 to 300N, for example, about 155N (F = about 25N), the deformation of the ring member R, etc. The pump main body P1 can be quickly positioned by following the above.

FIG. 10A shows the conditions for following the reference surface of the reference jig (ring holding jig 31) to cause the ring member R and the pump main body P1 to perform a copying operation. The tracing torque generated by the clamping force is shown in FIG. When Ta, the resistance torque due to the frictional force of the copying mechanism 22 is Tb, and the behavior torque due to the acceleration force generated in the pump body P1 is Tc,
Ta> Tb + Tc
It is necessary to. As an example, as shown in the figure, the distance (60 mm) between the reference surface of the ring pressing jig 31 and the center of gravity of the workpiece (60 mm), the distance (120 mm) between the friction surface of the copying mechanism 22, and the distance between the clamp position and the central axis (8mm), when the workpiece mass (m = 2kg) is set,
Ta = F · 8
Tb = μ · (F + mg) · 120
Tc = ma · 60
(Where μ: friction coefficient, g: gravitational acceleration, a: acceleration)
And
F> (2400 μ + 120) / (8−120 μ)
(Assuming a = 0.1G)
It becomes. Since the air floating type copying mechanism 22 has a friction coefficient μ of almost zero,
F> 15
Therefore, it can be considered that the copying operation of the pump body P1 is sufficiently possible if the clamping force is set to be larger than that.

  Thereafter, in the state shown in the right diagram of FIG. 7, a negative pressure is further applied to the copying apparatus 22 to lock the base 25 and the movable plate 27 (locking process), and then the pump body P1 is held in the copying posture. Then, the ring member R and the housing H are joined (joining process). Specifically, using the welding processing head L shown in FIG. 1B, the laser irradiation position is set at the joint portion between the annular flange portion R2 of the ring member R and the housing H, and the rotation mechanism 11 is operated. Then, while being held between the ring pressing jig 31 and the copying mechanism 22, the ring member R is integrally rotated together with the pump body P1, and the entire circumference of the annular flange portion R2 is welded. Thus, since the ring member R is adjusted in advance with respect to the ring pressing jig 31 as a reference, even if the ring member R is a press component having a relatively low accuracy, it is possible to reduce the displacement of the rotating shaft. This is less likely to cause welding defects.

  In addition, this joining process is implemented about the workpiece | work W from which the ring member R and the pump main body P1 are separate bodies like this embodiment, or the workpiece | work W which has a joining cylinder part integral with a workpiece | work main body, or another procedure beforehand. In the workpiece W provided with the joining cylinder portion, it is omitted.

Further, in the process shown in the left diagram of FIG. 8, the air cylinder mechanism 62 of the lock cylinder mechanism 6 is driven while the pump body P <b> 1 is kept locked, and the pressing pin 32 is lowered into the ring pressing jig 31 to connect the connector. Contact the part C (holding switching step). At this time, the pressing force Fd of the pressing pin 32 only needs to be able to press the connector C from above and hold the position, and the ring pressing force Fd is relatively weak with respect to the lifting force Fa by the work clamp mechanism 4. It is set to be smaller than the clamping force F of the jig 31.
Fd <Fa-Fb
(F = Fa-Fb)
Next, using the lock mechanism 63 of the lock cylinder mechanism 6, the rod 62 a is locked and the position of the pressing pin 32 is fixed. The locking force of the locking mechanism 63 at this time is 215N, for example.

Then, in the process shown in the right diagram of FIG. 8, the ring pressing mechanism 5 is driven to raise the ring pressing jig 31 and move it to the retracted position (retracting process). At this time, the clamping force F of the ring member R by the ring pressing jig 31 is released, and the reaction force Fe of the lifting force Fa is transferred to the pressing pin 32.
Fa-Fb> Fe
(Fe <215N (locking force))

  Thereafter, the ring member R and the connector part C are joined together while keeping the pump body P1 in the following posture (joining step). Specifically, using the welding processing head L shown in FIG. 1B, the laser irradiation position is set at the joining portion between the cylindrical portion R1 of the ring member R and the connector portion C, and the rotation mechanism 11 is operated. The ring member R is integrally rotated together with the pump body P1 while being held between the pressing pin 32 and the copying mechanism 22, and the entire circumference of the tubular portion R1 is welded. In this process, the ring member R is fixed to the housing H held in a copying posture, and the axis is adjusted with reference to the ring pressing jig 31, so that welding failure or the like due to the displacement of the rotating shaft does not occur. Bonded well.

  Here, as shown in FIG. 10B, the lock cylinder mechanism 6 is preferably configured so that the tip end portion of the pressing pin 32 that contacts the workpiece component (connector member C) has a curved surface so as to be in curved contact with the connector member C. . The connector member C tends to be inclined with the connector member C with respect to the mounting hole P2 of the pump body P1, and the holding position is likely to vary. For this reason, the contact position becomes a point contact, and there is a concern that the connector member C may be damaged when the reference jig is retracted. By using the curved surface contact, the effect of preventing the damage and maintaining the quality can be obtained.

  According to the joining apparatus 1 having the above-described configuration, the ring member R itself that is a welded portion is caused to follow the ring pressing jig 31 that is a reference jig, the rotational axis deviation is corrected, and the pump body P1 is further moved by the copying mechanism 22. The position can be easily held by copying. Further, since the ring member R can be released from the support by the ring pressing jig 31 by switching to holding by the pressing pin 32 and the lock cylinder mechanism 6, the bonding position accuracy can be easily secured and the bonding with the connector member C can be easily performed. Is possible.

  In the embodiment described above, the joining with the connector part C, which is a work component, has been described. However, the discharge valve part V shown in FIG. 2 is mounted in the mounting hole P3 of the pump body P1 and joined with the housing H. The case can also be implemented in the same manner. Moreover, each mechanism of the joining apparatus 1 is not restricted to the structure mentioned above, It can change suitably. For example, the copying mechanism 22 of the workpiece support portion may be a structure that can float in multiple directions, and the locking mechanism is not limited to the air lock type, and may be any brake that can obtain a braking force by other methods. In addition, the workpiece support mechanism 2 is lifted together with the movable plate M as the workpiece clamp mechanism 4, but conversely, the workpiece pressing portion 3 side can be lowered. The shape of the ring pressing jig 31 and the pressing pin 32 of the work pressing unit 3 and the pressing position are not particularly limited as long as a desired operation is possible.

  The joining method and joining device of the present invention are not limited to the fuel pump P for vehicles and other various pumps, but are workpieces that are separate shaft-like parts through a joining ring member in a mounting hole of the work body. It is also suitable for other products with structures for mounting components. Moreover, the structure which has a joining cylinder part integral with a workpiece | work main body may be sufficient, for example, the sensor apparatus which joins the sensor element penetrated to the cylindrical housing with the edge part of the cylindrical part provided integrally with the housing It can also be applied. And, it is possible to adjust the position of the joint itself according to the reference and reduce the fluctuation of the joint position, so there is no need to provide a high-precision reference surface close to the work joint, and the degree of freedom in product design Will improve.

DESCRIPTION OF SYMBOLS 1 Joining device 11 Rotating mechanism 2 Work support part 21 Work receiving jig 3 Work holding part 31 Ring holding jig (reference jig)
32 Presser pin (presser member)
4 Work clamping mechanism 5 Work holding mechanism (holding mechanism)
6 Lock cylinder mechanism (drive mechanism with lock)
C Connector (work component)
L Processing head (joining means)
P Fuel pump P1 Pump body (work body)
R ring member (joint tube)
W Work

Claims (5)

A method for assembling a workpiece component (C) to a bonded cylinder portion (R) provided on a workpiece body (P1) and bonding the outer peripheral surface of the workpiece component to the inner peripheral surface of the bonded cylinder portion. ,
A work holding part (3) having a reference jig (31) is disposed above a work supporting part (2) for floatingly supporting the work receiving jig (21) so as to be horizontally movable and tiltable. And a step of placing the workpiece (W) so that the joining tube portion faces the reference jig,
A step of relatively moving the work support portion in the direction of the reference jig, pressing the joining tube portion against the reference jig, and following the workpiece body;
Locking the work body in a copying posture while locking the pressing member (32) inserted from above into the reference jig at a position where it abuts the work component;
The reference jig is retracted to a position where it does not come into contact with the joining cylinder part, and the joining cylinder part and the work component are joined in a state where the work is held between the pressing member and the work receiving jig. A bonding method comprising the steps of: The joining tube portion is provided separately from the work body,
The joining method according to claim 1, further comprising a step of joining the joining tube portion to the work body prior to the operation of the pressing member after locking the work body in a copying posture. A device for assembling a workpiece component (C) to a bonded cylinder portion (R) provided on a workpiece body (P1) and bonding the outer peripheral surface of the workpiece component to the inner peripheral surface of the bonded cylinder portion. ,
It has a workpiece receiving jig (21) on which the workpiece (W) is placed with the above-mentioned joining tube portion as the upper surface side, and the workpiece receiving jig is supported in a floating manner so that it can be moved horizontally and tilted, and can be locked in any posture. A workpiece support portion (2) having a flexible copying mechanism;
A reference jig (31) opposite to the joining tube part is disposed above the work support part, and a pressing member (32) inserted into the reference jig so as to be movable up and down and lockable at an arbitrary position. A work holding part (3) having,
A workpiece clamp mechanism (4) for moving the workpiece support portion relative to the reference jig direction, pressing the joining tube portion against the reference jig, and following the workpiece body;
A holding mechanism (5) for switching the position of the reference jig between a work clamp position and a retracted position where the reference jig can be brought into contact with the joining cylindrical portion;
In a state where the workpiece is held between the pressing member and the workpiece receiving jig, the reference jig is switched to the retracted position, and a joining means (L) for joining the joining cylinder portion and the workpiece component, A joining apparatus comprising:   The joining apparatus according to claim 3, further comprising a rotation mechanism (11) for rotating the work held between the work support part and the work pressing part during joining. A driving mechanism (6) with a lock that drives the holding member in the axial direction of the reference jig and locks it at a predetermined position, and before the holding mechanism switches the reference jig to the retracted position. The joining apparatus according to claim 3, wherein the pressing member is driven to abut against the workpiece component and is locked at that position.

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