JP2012248650A - Rework device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rework device capable of accurately positioning a work part for performing heating and adsorption and a component and positioning the work part and a substrate or the like.SOLUTION: In a work unit 20, a work part to be arranged on a work axis A is selected from a plurality of work parts 21-24 by integrally operating the plurality of work parts along a predetermined track T1 and changing positions of the respective work parts. An observation part 30 includes a turning mechanism 31 turnable with the work axis A as a center, and an observation part body 32 supported by the turning mechanism 31 and moved along an arc track T2 with the work axis A as the center accompanying the turning of the turning mechanism 31 to change the direction of observing a work point P.

Description

  The present invention relates to a rework apparatus for performing an operation of removing an electronic component bonded on a substrate and an operation of attaching an electronic component on the substrate.

  2. Description of the Related Art Conventionally, there has been known a rework apparatus for removing a defective component from a substrate in an electronic circuit board in which the electronic component is soldered to the substrate and attaching a new component to the portion. Recent parts have a very small size such as 0.6 mm × 0.3 mm or 0.4 mm × 0.2 mm. Therefore, it is difficult to accurately determine the position of the component with the naked eye in the component removing operation and the attaching operation.

  Therefore, Patent Document 1 discloses a rework apparatus that aims to accurately hold a small part that cannot be discriminated with the naked eye, and to easily replace a mounted part on a substrate. This rework device includes a photographing device. In this photographing apparatus, an image of the substrate surface on the substrate mounting base and an image of the component held at the tip of the holder are taken together, and these images are combined.

JP 2004-228131 A

  However, in the rework device described in Patent Document 1, the accuracy of alignment between the component held at the tip of the holder and the substrate surface is not necessarily high.

  Therefore, the present invention has been made in view of such points, and the object of the present invention is to accurately align the working part and the part for heating and sucking, and the positioning of the working part and the substrate. An object of the present invention is to provide a rework apparatus that can be performed well.

  (1) The present invention relates to a rework apparatus that performs an operation of removing a component bonded to a substrate by a bonding material and an operation of mounting the component on the substrate. The rework device includes a plurality of working units including a substrate holding unit that holds the substrate so that the substrate intersects a work axis, an adsorption working unit that sucks the components, and a heating working unit that heats the bonding material. A work unit; and an observation unit for magnifying and observing a work point where the work shaft and the substrate intersect. In the work unit, the work parts arranged on the work shaft by the plurality of work parts integrally operating along a predetermined track and changing the position of each work part are the plurality of work parts. Selected from the working section. The observation unit is supported by the rotation mechanism that can rotate about the work axis, and along an arc orbit centered on the work axis as the rotation mechanism rotates. An observation unit main body that moves and changes the direction of observing the work point. The work is performed on a single work axis.

  In this configuration, the parts can be placed and moved by sucking the parts by the suction working part in the parts removing and attaching work, and the heating work part is used to heat and melt the bonding material such as solder. Can be bonded onto the substrate or the component can be removed from the substrate. Further, in the work unit, the plurality of work parts arranged on the work axis by integrally operating along a predetermined track and changing a position of each work part is provided with the plurality of work parts. Therefore, a plurality of different work processes (such as an adsorption process and a heating process) can be realized with a single device.

  Also, with this configuration, it is possible to perform the rework work of the minute part while observing the work point with the observation unit. In addition, the observation unit main body of the observation unit moves along the circular arc trajectory as the rotation mechanism rotates, and the direction in which the work point is observed is changed. That is, the observation unit main body can be arranged at different positions on the circular arc trajectory, and the work points can be observed from different directions by observing the work points at these positions. Therefore, with this configuration, it is possible to accurately perform alignment between the working unit and the parts for heating and suction, alignment between the working unit and the substrate, and the like.

  (2) In the rework device, the observation unit main body is supported by the rotation mechanism in a posture in which the work point can be observed obliquely from above, and the observation unit body is obliquely viewed from above as the rotation mechanism rotates. It is preferable that the direction of observing the work point is changed by moving along the circular arc trajectory while maintaining the observation posture.

  In this configuration, the observation unit main body moves along the circular arc trajectory while maintaining the observation from obliquely upward with the rotation of the rotation mechanism, so that, for example, compared with the case where the work point is observed in the horizontal direction, for example. The components, the substrate, the working part, and the bonding material positioned at the work point can be observed more three-dimensionally. Thereby, the precision of alignment can be raised more. In addition, since the observation is from obliquely above, the state of the bonding material such as the amount and shape of the bonding material supplied onto the substrate and the shape (fillet) of the bonding material after the component is bonded onto the substrate are three-dimensional. Can be accurately determined.

  (3) In the rework apparatus, it is preferable that the observation unit further includes an inclination angle adjustment mechanism capable of changing an inclination angle with respect to a horizontal direction when the observation unit body observes the work point.

  In this configuration, the angle at which the work point is observed can be changed as the inclination angle is changed.

  (4) In the rework device, the work unit further includes a support shaft parallel to the work shaft, and a unit main body supported by the support shaft so as to be rotatable about the support shaft. The working portion is supported by the unit body in a state of being spaced apart from each other along a circumferential direction around the support shaft, and the support shaft is centered as the unit body rotates. It is preferable to operate integrally along the circular orbit.

  In this configuration, the working unit to be arranged on the work axis can be selected by rotating the unit main body. For example, a plurality of working units are arranged linearly in one direction, and a plurality of working units are arranged along this one-way linear track. Compared with the case where these working parts are operated integrally, it is possible to suppress an increase in the space required for arranging a plurality of working parts in the one direction, and to achieve compactness. In addition, since the work unit is structured to rotate around a support shaft parallel to the work axis, if the work unit supports a plurality of work parts along the circumferential direction, each work part is It is possible to make a configuration that always passes through the work shaft when rotating.

  (5) In the rework apparatus, it is preferable that the work unit further includes a fine adjustment mechanism that finely adjusts a position of a work unit arranged on the work shaft in the work shaft direction. In this configuration, the position of each working unit can be adjusted more accurately.

  (6) The rework device further includes a component table on which a component to be mounted on the substrate is placed, and the component table has a work position that intersects the work axis and a retreat position that does not intersect the work axis. And at least 90 ° pivotable about the work axis at the work position.

  In this configuration, the component is placed on the component table at the retracted position, and the component is sucked by the suction working unit at the work position. At this work position, before the parts are sucked, the parts table can be rotated around the work axis in a range of at least 90 °, so that the orientation of the parts at the time of suction can be adjusted in advance to a desired direction.

  (7) Preferably, the rework device further includes a laser pointer having an optical axis passing through the work axis. In this configuration, since the rough work axis can be visually observed with the laser pointer, rough position adjustment can be performed manually in advance, and workability is further improved.

  (8) Preferably, the rework apparatus further includes an auxiliary heating mechanism for auxiliaryly heating the substrate held by the substrate holding portion. In this configuration, since an auxiliary heating mechanism is further provided, the time required for heating can be shortened.

  As described above, according to the present invention, the component, the substrate, and the working unit for adsorbing the component and heating the bonding material can be accurately aligned, and the state of the bonding material can be accurately determined. can do.

It is a perspective view which shows the state which looked at the rework apparatus which concerns on one Embodiment of this invention from diagonally upward. It is a perspective view which shows the state which looked at the said rework apparatus from diagonally upward on the back side. It is a perspective view which shows the work unit of the said rework apparatus. (A)-(E) are figures which show each working part of the said work unit. It is a side view which shows the state in which the inclination-angle of the observation part of the said rework apparatus is adjusted. It is a top view which shows the state in which the observation part of the said rework apparatus is rotated. (A) is a top view which shows the board | substrate holding part and component table in the said rework apparatus, (B) is a side view which shows the said board | substrate holding part and a board | substrate.

  Hereinafter, a rework apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

<Overall structure of rework device>
As shown in FIG.1 and FIG.2, it is a perspective view which shows the rework apparatus 11 which concerns on this embodiment. The rework device 11 performs an operation of attaching or removing the component 17 on the substrate 13 (see FIG. 7B) and an operation of taking out the component 17 on the component table 43 (suction operation) on the work axis A. The work axis A is a single reference line (virtual line) that serves as a reference for work in the rework device 11, and is oriented in the vertical direction in the present embodiment. 1 and 2, front F, rear B, right R, left L, upper U, and lower D are as indicated by arrows shown in the drawings.

  The rework device 11 includes a base 41, a support portion standing up from the base 41, an observation portion 30 that can be rotated around a work axis A parallel to the support portion, and a support shaft 26 parallel to the support portion. A work unit 20 that is rotatable at the center. Specifically, the support portion includes a support column 81 standing from the base 41 and an arm portion extending laterally from the support column 81. This arm portion includes a first arm portion 82 and a second arm portion 84 which will be described later. The rework device 11 further includes a slide mechanism 92, a substrate holding unit 19, a laser pointer 51, and a component table 43.

  The base 41 is a plate-like member having a rectangular outer shape in plan view, and a rectangular penetrating portion 41a penetrating in the vertical direction is formed at the center. The base 41 has a size capable of stably supporting each member. A plurality of legs 41A may be attached to the lower surface of the base 41 (see FIG. 5). Further, an auxiliary heating mechanism 53 such as an infrared heater or a hot air heater may be arranged below the through-hole 41a of the base 41 to increase the amount of heat (see FIG. 5). The auxiliary heating mechanism 53 is for auxiliary heating of the substrate 13 held by the substrate holder 19 and can be omitted.

  The support column 81 is disposed at the rear B portion of the base 41. The support column 81 has a cylindrical shape and extends upward from the upper surface of the base 41. The lower end of the column 81 is fixed to the upper surface of the base 41.

  The slide mechanism 92 can slide the work unit 20, the observation unit 30, and the laser pointer 51, which will be described later, integrally with the first arm unit 82 in the vertical direction. As a result, the component pickup position (upper end position) and the component attachment / detachment position (lower end position) are switched. The slide mechanism 92 includes a first arm portion 82, a guide rail 87, a fitting portion 86, a vertical lever 91, a slide shaft 93, a horizontal plate 94, a vertical plate 83, and a second arm portion 84. Including.

  The first arm portion 82 is provided at the upper end portion of the column 81 and has a rectangular parallelepiped shape extending forward F from the column 81. The first arm portion 82 plays a role of supporting the work unit 20, the observation portion 30, the laser pointer 51, and the like and a case of housing a part of the slide mechanism 92 inside.

  The guide rail 87 is fixed to the front surface (front end) of the first arm portion 82. The guide rail 87 is elongated in the vertical direction and has a flat shape in which the thickness in the front-rear direction is smaller than the width in the left-right direction. The fitting portion 86 has a recess that fits into the guide rail 87 and is slidable in the vertical direction along the guide rail 87.

  The vertical lever 91 includes a shaft portion 91a and a grip portion 91b attached to one end (outer end) of the shaft portion 91a and extending in a direction orthogonal to the shaft portion 91a. The shaft portion 91 a is inserted into the first arm portion 82 through a through hole (not shown) provided on the left side surface of the first arm portion 82. The other end (inner end) of the shaft portion 91 a is disposed in the first arm portion 82.

  The slide shaft 93 is a columnar member that is positioned between the shaft portion 91a and the guide rail 87 and extends in the vertical direction. A part of the slide shaft 93 is inserted into the first arm portion 82 through a through hole provided in the upper surface of the first arm portion 82. The vertical movement of the slide shaft 93 and the pivoting movement of the shaft portion 91a are configured to be linked by, for example, an unillustrated gear provided in the first arm portion 82.

  The horizontal plate 94 is a plate-like member extending in the horizontal direction, spans between the upper end of the slide shaft 93 and the upper end of the vertical plate 83, and connects them. The vertical plate 83 is a plate-like member extending in the vertical direction. The inner surface (the surface of the rear B) of the lower portion of the vertical plate 83 is fixed to the outer surface (the surface of the front F) of the fitting portion 86.

  The second arm portion 84 is supported on the upper portion of the vertical plate 83. Specifically, the rear B end of the second arm portion 84 is fixed to the front F surface at the top of the vertical plate 83. The second arm portion 84 extends forward F from the vertical plate 83, is bent rightward R from the front end portion, and has an L shape in plan view. A work unit 20 described later is attached to the bent portion 84 a of the second arm portion 84. An observation unit 30 and a laser pointer 51, which will be described later, are attached to a right end portion 84b that is a tip portion extending rightward R from the bent portion 84a of the second arm portion 84.

  With the above-described configuration, the operator holds the grip portion 91b and rotates the shaft portion 91a to move the slide shaft 93 up and down, so that the work unit 20, the observation unit 30, and the laser are moved. The pointer 51 can be slid up and down integrally. Thereby, the operator can switch between a component pickup position (upper position), which will be described later, and a component attachment / detachment position (lower position).

<Substrate holder>
The substrate holding unit 19 can hold the substrate 13 so that the substrate 13 and the work axis A intersect. The substrate holding part 19 includes a base rail part 67, a first adjustment mechanism 69, a second adjustment mechanism 70, and a pair of support rail parts 68 (68A, 68B).

  In the base rail portion 67, four rails are arranged in a rectangular shape along the four edges of the penetrating portion 41a of the base 41, and adjacent end portions are fixed to each other to be integrated. An upper groove 65 extending along the longitudinal direction is formed on the upper surface of the rail disposed on the right side R and the rail disposed on the left side L of the penetrating portion 41a.

  The first adjustment mechanism 69 is for finely adjusting the position of the base rail part 67 in the left-right direction with respect to the base 41, and the second adjustment mechanism 70 is for finely adjusting the position of the base rail part 67 in the front-rear direction with respect to the base 41. It is for adjustment.

  The first adjustment mechanism 69 adjusts the interval between the fixed member 615 fixed to the upper surface of the base 41, the movable member 616 fixed to the outer surface of the base rail portion 67, and the fixed member 615 and the movable member 616. Adjusting mechanism. The fixing member 615 is a plate-like member having an L-shaped cross section. The adjustment mechanism is provided between the fixed member 615 and the movable member 616, and includes a pair of urging members disposed on both sides. These urging members are constituted by, for example, a spring or the like, and urge the movable member 616 in a direction in which the movable member 616 is separated from the fixed member 615. The adjustment mechanism further includes a shaft member 619 inserted through a through hole provided in the standing portion of the fixing member 615. A male screw is formed on the outer surface of the shaft member 619. The adjustment mechanism further includes a nut member 617 screwed into the shaft member 619.

  An inner end portion (end portion on the movable member 616 side) of the shaft member 619 is screwed into a nut 618 fixed to the flat plate portion of the movable member 616. The outer end portion of the shaft member 619 protrudes outward from the standing portion of the fixing member 615, and the nut member 617 is screwed to the protruding portion. By rotating the nut member 617 clockwise or counterclockwise, the distance between the fixed member 615 and the movable member 616 is adjusted, and accordingly, the position of the base rail portion 67 in the left-right direction with respect to the base 41 is finely adjusted.

  The second adjustment mechanism 70 has the same structure as the first adjustment mechanism 69 except that the position of the base rail portion 67 in the front-rear direction with respect to the base 41 is finely adjusted. To do. By rotating the nut member 617 of the second adjustment mechanism 70 clockwise or counterclockwise, the distance between the fixed member 615 and the movable member 616 is adjusted, and accordingly, the position of the base rail portion 67 in the front-rear direction with respect to the base 41 is fine. Adjusted.

  The support rail portions 68A and 68B are supported by the base rail portion 67 so as to be slidable relative to the base rail portion 67. Each support rail 68 has a groove 71 extending on the upper surface along the longitudinal direction.

  The groove portion 71 of each support rail 68 is provided with a pair of mounting portions 72, 72 that can slide in the longitudinal direction along the groove portion 71. Each mounting portion 72 has a screw on the upper portion, and the screw 72 is fixed or slidable with respect to the support rail 68 by rotating the screw clockwise or counterclockwise. Each mounting portion 72 further includes a protruding portion 63 that protrudes in a rod shape on the inside, and a leaf spring portion 64 provided on an upper portion adjacent to the protruding portion 63. Therefore, the substrate holding part 19 has a total of four projecting parts 63 and a total of four leaf spring parts 64.

  The position of each support rail 68 is adjusted by the support rail adjustment knob 622 according to the size of the substrate 13 and the position of the component 17 on the substrate 13, and the position of each placement portion 72 is adjusted. Then, the peripheral edge of the substrate 13 is placed on the four protruding parts 63 and is urged inward by the leaf spring part 64. As a result, the substrate 13 is held in a stable state by the substrate holder 19.

<Unit of work>
As shown in FIG. 3, the work unit 20 includes a support shaft 26, a unit main body 27, four head mounting portions 29, and a fine adjustment mechanism 28 (28A, 28A, 28) for finely adjusting the positions of the head mounting portions 29. 28B, 28C) and a plurality of work heads. The plurality of work heads include a suction head 22 as a suction work unit that sucks the component 17 and a heating head 21 as a heating work unit that heats the solder.

  The support shaft 26 is a columnar member extending in the vertical direction. The upper end portion is fixed to the bent portion 84a of the second arm portion 84, and extends downward from the bent portion 84a. The direction in which the support shaft 26 extends is parallel to the work axis A.

  The unit main body 27 is supported by the support shaft 26 so as to be rotatable about the support shaft 26. The unit body 27 has a prismatic shape having four side surfaces substantially parallel to the work axis A. A head mounting portion 29 is supported on each of these side surfaces via a head slide mechanism 95.

  Working heads as shown in FIGS. 4A to 4E are mounted on the four head mounting portions 29. These head mounting portions 29 are supported by the unit main body 27 in a state of being spaced apart from each other along the circumferential direction around the support shaft 26. Adjacent head mounting portions 29 are arranged at a position where the angle about the support shaft 26 is 90 °. These head mounting portions 29 operate integrally along a circular orbit T1 (see FIG. 6) centering on the support shaft 26 as the unit main body 27 rotates. The head mounting part 29 has a mounting hole 29a penetrating in the vertical direction. Each work head is inserted into the mounting hole 29a.

  Each head slide mechanism 95 includes a guide rail 951 provided on each side surface of the unit main body 27, a fitting portion 952 having a recess to be fitted to the guide rail 951, and the head mounting portion 29 in the retracted position (upper position). A stopper 953 for locking and a locking hole 954 into which the tip of the stopper 953 enters are included. Each guide rail 951 extends in the vertical direction. The fitting portion 952 can slide in the vertical direction along the guide rail 951. FIG. 3 shows a state in which each head mounting portion 29 is arranged at the work position (lower position).

  Each fine adjustment mechanism 28 includes a first plate member 281, a second plate member 282, a third plate member 283, a screw member B1, and cams C1 and C2. Each fine adjustment mechanism 28 includes a first mechanism 28A that finely adjusts the vertical position of the head mounting portion 29, a second mechanism 28B that finely adjusts the horizontal position of the head mounting portion 29, and the second mechanism 28B. A third mechanism 28C that finely adjusts the horizontal position of the head mounting portion 29 in a direction perpendicular to the head mounting portion 29. Each fine adjustment mechanism 28 can accurately adjust the position of the tip of the work head to the work point P.

  The first plate member 281 extends downward from the lower surface of the unit body 27. The first plate member 281 is a plate-like member that is arranged adjacent to the inside of the guide rail 951 and arranged in a posture parallel to the corresponding side surface of the unit main body 27. The first plate member 281 has a protruding portion 281a that is bent at the lower end thereof and protrudes outward.

  The second plate member 282 is fixed to the outer surface in a posture parallel to the outer surface of the fitting portion 952. The second plate member 282 has a protruding portion 282a that is bent at the lower end thereof and protrudes inward. The protruding portion 282a of the second plate member 282 is positioned above the protruding portion 281a of the first plate member 281 and is disposed so as to face the protruding portion 281a of the first plate member 281 in the vertical direction.

  The third plate member 283 is disposed adjacent to the outside of the second plate member 282. The third plate member 283 includes a contact portion 283a that is parallel to the second plate member 282 and in surface contact with the second plate member 282, and a pair of protrusions that protrude outward from both sides of the contact portion 283a. It has pieces 283b and 283c.

  The third plate member 283 is supported by the second plate member 282 so as to be rotatable with respect to the second plate member 282 at the rotation center R1 located in the contact portion 283a. The pair of projecting pieces 283b and 283c are arranged to face each other at a predetermined interval, and are plate-like portions parallel to the left-right direction when the work head is on the work axis A. A portion 29 is arranged. The head mounting portion 29 is configured to be rotatable with respect to the third plate member 283 at a rotation center R2 located in the one protruding piece 283b and a rotation center R3 located in the other protruding piece 283c. The plate member 283 is supported.

  The screw member B1 is a rod-like member extending in the vertical direction, and a male screw is formed on the outer surface. The screw member B1 is inserted through a through hole provided in the protruding portion 282a of the second plate member 282. A female screw is formed in the through hole. The lower end portion of the screw member B1 is fixed to the upper surface of the protruding portion 281a of the first plate member 281.

  Therefore, the operator can move the second plate member 282 in the vertical direction with respect to the first plate member 281 by rotating the screw member B1. Thereby, in the first mechanism 28A, the position of the head mounting portion 29 supported by the second plate member 282 via the third plate member 283 can be finely adjusted.

  The cam C1 has a circular shape whose center axis is eccentric, and the rotation center R4 is in a position eccentric to one side in the horizontal direction. The cam C1 is rotatably supported by the second plate member 282. A part (upper part) of the abutting portion 283a of the third plate member 283 extends to a position beyond the protruding piece 283b, and the cam C1 includes a part of the outer peripheral surface of the cam C1 in this part. A recessed portion (fitting portion) to be fitted is formed. The recess has an inner peripheral surface that is slightly larger than the circular outer peripheral surface of the cam C1. The third plate member 283 is supported by the second plate member 282 at the rotation center R1 and the cam C1 described above.

  Therefore, the operator rotates the cam C1 eccentric as described above at the rotation center R4, so that the portion opposite to the rotation center R4 is displaced upward or downward, and the concave portion of the third plate member 283 is displaced. The third plate member 283 moves up and down around the rotation center R1. Thereby, in the 2nd mechanism 28B, the position of the horizontal direction of the head mounting part 29 can be finely adjusted.

  Similar to the cam C1, the cam C2 has a circular shape whose center axis is eccentric, and the rotation center R5 is in a position eccentric to one side in the horizontal direction. The cam C2 is rotatably supported by the head mounting portion 29. A concave portion (fitting portion) that fits into the cam C2 is formed at the tip of the protruding piece 283b of the third plate member 283 so as to wrap a part of the outer peripheral surface of the cam C2. The concave portion has an inner peripheral surface that is slightly larger than a circular outer peripheral surface in which the central axis of the cam C2 is eccentric. The head mounting portion 29 is supported by the third plate member 283 at the rotation centers R2 and R3 and the cam C2.

  Therefore, the operator rotates the eccentric cam C2 as described above at the rotation center R5, whereby the portion opposite to the rotation center R5 is displaced upward or downward, and the third plate member 283 protrudes. The inner peripheral surface of the concave portion in the piece 283b is pressed, and the head mounting portion 29 moves in the vertical direction around the rotation centers R2 and R3. Thereby, in the 3rd mechanism 28B, the position of the horizontal direction of the head mounting part 29 can be finely adjusted in the direction orthogonal to the 2nd mechanism 28B.

  The stopper 953 is a rod-shaped member extending in a direction orthogonal to the second plate member 282 and is supported by the second plate member 282 so as to be displaceable with respect to the second plate member 282 in the longitudinal direction. Specifically, the stopper 953 has a portion protruding outward from the second plate member 282, that is, a holding portion gripped by the operator, and a portion protruding inward from the second plate member 282. . The stopper 953 is urged inward from the second plate member 282 by an urging member such as a spring (not shown).

  A locking hole 954 of each head slide mechanism 95 is formed on the side surface of the unit main body 27. The locking hole 954 is located above the stopper 953. On the side surface of the unit main body 27, an inclined surface 27a is formed between the stopper 953 and the locking hole 954. The inclined surface 27a is inclined so as to be located inward as it goes downward in the region.

  Therefore, the operator can slide the head mounting portion 29 in the vertical direction along the guide rail 951 of the head slide mechanism 95. Then, the operator slides a work head that is not used for the component pick-up operation, the component mounting operation or the removal operation upward, and fits the stopper 953 into the locking hole 954, thereby mounting the head on the head mounting portion 29. The working head can be retracted to the retracted position (upper position). When the working head is moved upward, the inner end portion of the stopper 953 is pressed against the inclined surface 27a while being in contact with the inclined surface 27a, and is guided to the locking hole 954 while the amount of protrusion to the inside is reduced.

  Further, the operator engages with the stopper 953 by pulling the work head used for the component pick-up operation and the component attaching / detaching operation (component attaching operation or removing operation) by holding the gripping portion of the stopper 953. By disengaging the engagement with the hole 954 and sliding the head mounting portion 29 downward, the working head mounted on the head mounting portion 29 can be placed at the working position (lower position).

  FIG. 4A is a side view showing a state in which the heating head 21 is mounted on the head mounting portion 29. 4B to 4E are plan views showing examples of combinations of work heads mounted on the four head mounting portions 29 of the unit main body 27. FIGS. 4F to 4I are front views thereof. FIG. Specifically, FIGS. 4B and 4F show the heating head 21, FIGS. 4C and 4G show the suction head 22, and FIGS. 4D and 4H show the solder application head. 23, and FIGS. 4E and 4I show the solder suction head 24. FIG. In each figure, the part where the work axis A and the board 13 or the component table 43 intersect is a work point P at which each work is performed.

  As shown in FIG. 4A, the heating head 21 includes a columnar head main body 211 that is inserted into and supported by the mounting hole 29a of the head mounting section 29, and a heating section 212 that extends downward from the head main body 211. And a heat source supply unit 213 extending upward from the head body 211. As the heating head 21 shown in FIGS. 4A, 4B, and 4F, for example, a hot air head 21, a soldering iron head 21, or the like can be used.

  The heating head 21 is a heat source for melting the solder that joins the component 17 to the substrate 13. In the case of the hot air head 21, heat can be supplied to the solder in a non-contact state with respect to the solder, the component 17 and the substrate 13. Specifically, the tip (lower end) of the heating unit 212 of the hot air head 21 is disposed at a position close to the solder, and in this state, hot air supplied through the heat source supply unit 213 is supplied from the heating unit 212 toward the solder. That's fine. When the soldering iron head 21 is used, the tip (lower end) of the heating unit 212 of the soldering iron head 21 is disposed at a position in contact with the solder, and the temperature is raised by the electric power supplied through the heat source supply unit 213 in this state. Heat may be supplied to the solder from the tip of the heated portion 212. The hot air head 21 and the soldering iron head 21 can also employ a structure in which the head main body 211 is shared and only the heating unit 212 at the tip is replaced.

  The suction head 22 shown in FIGS. 4C and 4G has an unillustrated suction portion that sucks air at the tip (lower end) or in the vicinity thereof. The upper end of the suction head 22 is connected to a suction means (vacuum) 97 shown in FIG. By operating the suction means 97, air is sucked from the suction portion of the suction head 22, so that the component 17 can be sucked by the suction portion.

  The application head 23 shown in FIGS. 4D and 4H is for applying cream solder (flux) to the substrate 13 and the component 17. The upper end portion of the coating head 23 is connected to a cream solder supply means (not shown) by a tube (not shown). By sending cream solder from the supply means to the application head 23, the cream solder is discharged from the tip (lower end) of the application head 23. Thereby, cream solder can be applied to the substrate 13 and the component 17.

  The solder sucking head 24 shown in FIGS. 4E and 4I is for sucking the solder adhering to the substrate 13 or the component 17. The suction head 24 is connected to suction means in the same manner as the suction head 22 described above, and can suck solder from the tip (lower end).

  In the work unit 20, these four work heads 21 to 24 integrally operate along a circular orbit T <b> 1 centered on the support shaft 26 to change the position of each work head unit. Thereby, the work head arranged on the work axis A is selected from the plurality of work heads 21 to 24.

<Observation part>
As shown in FIGS. 1 and 2, the observation unit 30 includes a rotation mechanism 31 and a camera (video imaging device) 32 as an observation unit main body. The camera 32 is supported by the rotation mechanism 31. The camera 32 is supported by the rotation mechanism 31 in such a posture that the work point P can be observed obliquely from above. As the camera 32, a microscope etc. can be used, for example. The image taken by the camera 32 is displayed on a monitor (not shown), for example, so that the operator can confirm it in real time. The observation unit 30 further includes an inclination angle adjustment mechanism that can change the inclination angle with respect to the horizontal direction when the camera 32 observes the work point P from obliquely above.

  As shown in FIG. 5, the observation unit 30 magnifies and observes a work point P where the work axis A and the substrate 13 or the component table 43 intersect. The work point P includes a work point P1 where the work axis A and the substrate 13 intersect, and a work point P2 where the work axis A and the component table 43 intersect.

  As shown in FIG. 4A, when the work unit 20, the observation unit 30 and the laser pointer 51 are in the component attachment / detachment position (lower position), the component 17 is attached to or detached from the board 13, so the work point P1 These operations are performed. On the other hand, as shown in FIG. 5, when the work unit 20, the observation unit 30, and the laser pointer 51 are at the parts pick-up position (upper position), the parts 17 are picked up from the parts table 43, so this work is performed at the work point P2. Is done.

  The rotation mechanism 31 is a member that can rotate about the central axis in the vertical direction with respect to the second arm portion 84 and can support the camera 32. Specifically, the rotation mechanism 31 includes a horizontal plate 31a placed on the upper surface of the second arm portion 84, and a vertical plate 31b that is fixed to a side edge of the horizontal plate 31a and extends downward. The horizontal plate 31a is rotatably supported by the right end portion 84b of the second arm portion 84 via a support member such as a shaft (not shown) at the rotation center that coincides with the work axis A. At the lower end of the vertical plate 31b, an arc-shaped slit 31c is formed along an arc centered on the work point P.

  The camera 32 includes a base end portion 32a fixed to the vertical plate 31b, a cylindrical camera lens assembly 32b extending obliquely downward from the base end portion 32a, a pair of guide pins 32c and 32d, and a set screw 32e. including. The camera lens assembly 32b extends toward the work point P. The pair of guide pins 32c and 32d and the set screw 32e are attached to the side portion of the base end portion 32a.

  The pair of guide pins 32c and 32d are inserted into the slit 31c of the vertical plate 31b, are arranged at a distance from each other, and are slidable within the range of the slit 31c. The guide pins 32 c and 32 d connect the base end portion 32 a and the camera lens assembly 32 b to the rotation mechanism 31. Since the slit 31c has an arc shape centered on the work point P, for example, as shown in FIG. 5, the position 32A before the slide movement of the guide pins 32c and 32d, the position 32B after the slide movement, and a position between them The camera 32 can observe the work point P.

  The tilt angle adjusting mechanism includes a slit 31c, guide pins 32c and 32d, and a set screw 32e. By providing this tilt angle adjusting mechanism, the tilt angle of the camera lens assembly 32b of the camera 32 can be changed along the arc trajectory of the slit 31c with the work point P as the center. The tilt angle of the camera lens assembly 32b of the camera 32 and the change range thereof are not particularly limited. As a specific example, the inclination angle of the camera lens assembly 32b with respect to the horizontal direction is preferably adjustable in the range of 10 ° to 80 °, more preferably in the range of 20 ° to 70 °. In the embodiment shown in FIG. 5, the case where the inclination angle can be adjusted in the range of 40 ° to 65 ° is illustrated.

  The set screw 32e is disposed between the pair of guide pins 32c and 32d. The set screw 32e is inserted into the slit 31c, and has a shaft portion in which a male screw is formed on the outer surface, and a grip portion in which a female screw screwed into an end portion of the shaft portion is formed on the inner surface. By rotating the gripping portion clockwise or counterclockwise, the sliding movement of the pair of guide pins 32 c and 32 d is restricted or released, and the camera 32 is fixed or released from the rotation mechanism 31.

  As shown in FIG. 6, the rotation mechanism 31 rotates about the work axis A. The camera 32 moves along the circular arc trajectory T2 centered on the work axis A as the turning mechanism 31 turns, and the direction in which the work point P is observed is changed. The camera 32 maintains an observation posture obliquely from above while the rotation mechanism 31 is rotating. In the rotation mechanism 31 of the present embodiment, as shown in FIG. 6, the angle at which the rotation mechanism 31 can rotate around the work axis A is 180 °. Thereby, the work point P can be observed from a wide range such as the front, back, and side surfaces.

  The laser pointer 51 is disposed above the horizontal plate 31 a of the second arm portion 84 and the rotation mechanism 31. Members such as the second arm portion 84 and the horizontal plate 31a located below the laser pointer 51 have a through hole along the work axis A so that the laser beam reaches the work point P. From the lower end of the laser pointer 51, a laser beam that coincides with the work axis A and passes through the work point P is emitted downward. Therefore, the worker can visually confirm the rough position of the work point P by this laser beam.

<Parts table>
As shown in FIGS. 1 and 2, the component table 43 is supported by the support column 81 via the third arm portion 88. The base end portion of the third arm portion 88 is supported by the column 81 so as to be rotatable about the column 81. The parts table 43 is supported at the tip of the third arm portion 88 so as to be rotatable about the work axis A. A lever 98 is provided at the base end portion of the third arm portion 88 to restrict and release the rotation of the third arm portion 88.

  As shown in FIG. 7A, the parts table 43 is movable between a work position 43A that intersects the work axis A and a retreat position 43B that does not intersect the work axis A. In the present embodiment, the rotation range of the third arm portion 88 around the support column 81 is about 90 °. On the upper surface of the component table 43, a mounting recess for mounting the tape 18 on which a plurality of new components 17 are arranged is formed. The tape 18 placed in the placement recess is positioned by a pair of fasteners arranged so as to straddle the placement recess. The parts table 43 can be rotated at least 90 ° around the work axis A. Thereby, the new component 17 can be adjusted in a desired direction at the work position 43A.

  The component table 43 includes a fine adjustment mechanism 44 for finely adjusting the position in the left-right direction and a fine adjustment mechanism 45 for finely adjusting the position in the front-rear direction. As a result, the component 17 on the tape 18 placed in the placement recess can be accurately aligned with the work axis A at the work position 43A.

<Rework workflow>
Next, an example of rework work using the above-described rework device 11 will be described.

(1) The operator sets the substrate 13 on the substrate holding unit 19.
Next, the operator irradiates the laser beam with the laser pointer 51 and aligns the approximate position of the substrate 13 with respect to the work point P.

(2) The operator operates the up / down lever 91 to move the second arm portion 84 to the component attaching / detaching position (lower end position).
Next, the operator uses the observation unit 30 to check whether or not there is a work target part (rework point) of the substrate 13 at the work point P on the work axis A. At this time, the rotation mechanism 31 is rotated in the range of 0 ° to 180 °, and observed from, for example, three directions such as the front surface, the back surface, and the side surface. The mechanism 70 is used to adjust the position of the substrate 13 in the front-rear direction and the left-right direction.
Next, when an operation for removing the component 17 on the substrate 13 is necessary, the operator performs the following operations (3) and (4), and the operation for removing the component 17 on the substrate 13 is unnecessary. The operator omits the operations (3) and (4) and performs the following operation (5).
In the following operations, when adjusting a slight positional deviation, when selecting a land on the substrate 13, etc., the position is finely adjusted using the substrate holding portion 19 and the fine adjustment mechanisms 44 and 45 of the component table 43. adjust.

(3) The worker rotates the work unit 20 and arranges the heating head 21 such as the soldering iron head 21 and the hot air head 21 on the work axis A. In this state, all the four work heads attached to the unit main body 27 are arranged at the retracted position (upper position). Next, the operator pulls the stopper 953 corresponding to the heating head 21 to release the engagement between the stopper 953 and the locking hole 954 and slides the heating head 21 to the working position (lower position).
Next, the operator uses the observation unit 30 to confirm the position of the tip of the heating head 21 and the position of the part 17 to be worked, and finely adjust the position of the heating head 21 using each fine adjustment mechanism 28. adjust. When the soldering iron head 21 is used, the tip thereof is brought into contact with the work target component 17. When the hot air head 21 is used, the tip thereof is brought close to the component 17 to be worked. Thereby, the solder for joining the component 17 and the substrate 13 is melted by the heat of the heating head 21. When the solder melts, the component 17 adheres to the tip of the heating head 21 due to the surface tension of the solder. Therefore, the component 17 can be removed from the substrate 13 by raising the heating head 21 in this state.

(4) The worker rotates the work unit 20 and arranges the suction head 24 on the work axis A. Next, the operator pulls the stopper 953 corresponding to the suction head 24 to release the engagement between the stopper 953 and the locking hole 954 and slides the suction head 24 to the working position (lower position).
Next, the operator uses the observation unit 30 to check the position of the tip of the suction head 24 and the position of the land in the area where the component 17 is removed, and then uses each fine adjustment mechanism 28 to suck the suction head 24. The tip of the is brought into contact with the land. Then, the solder remaining on the land is sucked by the sucking head 24 and removed from the substrate 13.

(5) The worker rotates the work unit 20 and arranges the coating head 23 on the work axis A. Next, the operator adjusts the position of the coating head 23 using each fine adjustment mechanism 28 while confirming the position of the tip of the coating head 23 and the position of the land using the observation unit 30, Apply cream solder.

(6) The operator operates the up / down lever 91 to move the second arm portion 84 to the component pickup position (upper end position). Next, the worker rotates the third arm portion 88 to place the component table 43 at the work position 43A.
Next, the operator uses the observation unit 30 to check whether or not there is a target part 17 (pickup point) on the work axis A. At this time, the rotation mechanism 31 is rotated in the range of 0 ° to 180 °, and observed from three directions, for example, the front, back, and side surfaces. , 45 is used to adjust the position of the parts table 43 in the front-rear direction and the left-right direction.

(7) The worker rotates the work unit 20 and arranges the suction head 22 on the work axis A. Next, the operator uses the observation unit 30 to check the position of the tip (suction part) of the suction head 22 and the position of the new component 17 on the tape 18 and use each fine adjustment mechanism 28 to perform suction. After adjusting the position of the head 22, the component 17 is sucked by the suction head 22. With the component 17 being sucked in this way, the suction head 22 is slightly lifted upward using the fine adjustment mechanisms 28.

(8) The operator rotates the third arm portion 88 to place the component table 43 at the retreat position 43B. Next, the operator operates the up / down lever 91 to move the second arm portion 84 to the component attaching / detaching position (lower end position).
Next, the operator uses the observation unit 30 to check the position of the component 17 sucked by the suction head 22 and the position of the land, and adjusts these positions using the fine adjustment mechanisms 28. The component 17 is placed on the land by slightly lowering the suction head 22 downward using the fine adjustment mechanism 28.

(9) The worker rotates the work unit 20 and arranges the heating head 21 on the work axis A. After the positions of the heating head 21 and the component 17 are adjusted in the same manner as described above, the solder is melted by the heat of the heating head 21 and the component 17 is soldered to the substrate 13. In the heating process by the heating head 21, the auxiliary heating mechanism 53 described above may be used in combination.

<Outline of Embodiment>
The above embodiment is summarized as follows.

  In the present embodiment, the component 17 can be adsorbed by the adsorption head 22 in the component removal operation and attachment operation, and the component 17 can be arranged and moved, and the heating head 21 heats and melts the bonding material such as solder. Thus, the component 17 can be bonded onto the substrate 13 or the component 17 can be detached from the substrate 13. Further, in the work unit 20, the work heads arranged on the work axis A by changing the position of each work head by integrally operating the plurality of work heads along a predetermined track. Since the plurality of work heads can be selected, the workability of each work is excellent, and a plurality of different work processes (such as an adsorption process and a heating process) can be realized by a single device.

  Further, in the present embodiment, the rework work of the micro component 17 can be performed while the work point P is enlarged and observed by the observation unit 30. In addition, the observation unit main body 32 of the observation unit 30 moves along the circular arc trajectory T2 as the rotation mechanism 31 rotates, and the direction in which the work point P is observed is changed. That is, the observation unit main body 32 can be arranged at different positions on the arc trajectory T2, and the work point P can be observed from different directions by observing the work point P at these positions. Therefore, in this configuration, the positions of the component 17, the substrate 13, and the work head can be accurately aligned.

  Further, in the present embodiment, the observation unit main body 32 moves along the circular arc trajectory T2 while maintaining observation from obliquely upward as the rotation mechanism 31 rotates, so that, for example, the work point P in the horizontal direction. Compared to the case of observing the component 17, the component 17, the substrate 13, the work head, and the bonding material positioned at the work point P can be more stereoscopically observed. Thereby, the precision of alignment can be raised more. Further, since the observation is from obliquely above, the state of the bonding material such as the amount and shape of the bonding material supplied onto the substrate 13 and the shape (fillet) of the bonding material after the component 17 is bonded onto the substrate 13 Can be accurately determined three-dimensionally.

  In the present embodiment, in the rework device 11, the observation unit 30 further includes a tilt angle adjustment mechanism that can change the tilt angle with respect to the horizontal direction when the observation unit body 32 observes the work point P. The angle at which the work point is observed can be changed with the change of the tilt angle.

  In the present embodiment, since the work head to be arranged on the work axis A can be selected by rotating the unit body 27, for example, a plurality of work heads are linearly arranged in one direction. Compared with the case where a plurality of work heads are integrally operated along the track, the space required for arranging the plurality of work heads can be suppressed from increasing in the one direction, and the size can be reduced. . Further, since the work unit 20 has a structure that rotates around a support shaft parallel to the work axis A, if the work unit 20 supports a plurality of work heads along the circumferential direction, the work unit 20 is on the circular track T1. Each work head that moves is always passed through the work axis A when the work unit 20 is rotated.

  Further, in the present embodiment, since the rotation angle of the rotation mechanism 31 is 180 °, the work point P can be observed from a wide range such as the front, back, and side surfaces. The state of the bonding material for bonding the component 17 on the substrate 13 can be determined more accurately.

  In the present embodiment, the work unit 20 includes a fine adjustment mechanism that finely adjusts the position of the work head disposed on the work axis A in the direction of the work axis A. Can be adjusted more accurately.

  In the present embodiment, the component is placed on the component table at the retracted position, and the component 17 is sucked by the suction head 22 at the work position. At this work position, before the component 17 is sucked, the component table 43 can be rotated within a range of at least 90 ° around the work axis A, so that the orientation of the component 17 at the time of suction is set to a desired direction. Can be adjusted in advance.

  Further, in this embodiment, since the rough position of the work axis A can be visually observed by the laser pointer 51, rough position adjustment can be performed by manual work in advance, and workability is further improved.

  In the present embodiment, since the auxiliary heating mechanism 53 is further provided, the time required for heating can be shortened, so that the work speed can be increased and the rework range can be expanded.

  Other advantages of this embodiment include the following items.

  In the case where the work unit 20 is configured to operate integrally along the circular trajectory T1, the maximum angle at which the work mechanism 20 can turn around the work axis A in the turning mechanism 31 can be 180 ° or larger. become. For example, in the case of a configuration in which a plurality of work heads are arranged linearly in the one direction, the linear trajectory becomes an obstacle, so the maximum angle at which the rotation mechanism can rotate must be less than 180 °. Absent.

  Since the maximum rotation angle of the rotation mechanism 31 is 180 ° or larger, the work point P can be observed from a wide range, for example, the front, back, and side surfaces. It is possible to more accurately determine the state of the bonding material for bonding the components 17 to each other.

  In the present embodiment, each work head that performs a series of work is attached to the unit main body 27 around the support shaft, and has a compact structure that can be moved to the position of the work shaft A. Further, in the present embodiment, each work head is not fixed to the head mounting portion 29, and the combination can be changed as appropriate. A commercially available tool can be attached to the head mounting portion 29.

  In this embodiment, although there is one camera, rotation observation is possible in the range of 0 ° to 180 ° about the work axis A, and position confirmation in the front-rear direction and the left-right direction at the component pick-up point and work point is possible. Easy. This makes it possible to speed up each work.

  The surface treatment apparatus according to the embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the present invention.

  In the said embodiment, although the structure which a work unit rotates centering on a spindle was illustrated, it is not limited to this. The work unit may have a configuration in which, for example, a plurality of work heads are linearly arranged in one direction, and the plurality of work heads are integrally operated along the straight track in one direction.

  In the said embodiment, although the case where the observation part main body observed the work point from diagonally upward was illustrated, it is not limited to this. For example, the observation unit body may be configured to observe the work point in the horizontal direction.

  In the above-described embodiment, the case where the working unit 20, the observation unit 30, and the laser pointer 51 are integrally slid up and down by the single slide mechanism 92 is exemplified, but the present invention is not limited to this. The work unit 20, the observation unit 30, and the laser pointer 51 may be configured to move up and down by separate slide mechanisms. When the work point P1 where the work axis A and the substrate 13 intersect and the work point P2 where the work axis A and the component table 43 intersect are at the same position, the slide mechanism 92 is omitted and the work unit 20, The form which the observation part 30 and the laser pointer 51 do not move to an up-down direction may be sufficient.

  In the embodiment, the case where the component table 43 is provided is illustrated, but the component table 43 is not necessarily included in the rework apparatus 11.

  In the said embodiment, although the case where the rotation mechanism 31 of the observation part 30 rotated in the range of 0-180 degrees was illustrated, since it should just be able to observe in several places on a circular arc track, the rotation range of the rotation mechanism 31 is sufficient. May be less than 180 ° (for example, a range of 0 to 90 °, etc.).

DESCRIPTION OF SYMBOLS 11 Rework apparatus 13 Board | substrate 17 Parts 19 Board | substrate holding | maintenance part 20 Work unit 26 Support axis 27 Unit main body 28 Fine adjustment mechanism 30 Observation part 31 Rotating mechanism 32 Observation part main body 41 Base 43 Parts table 51 Laser pointer 53 Auxiliary heating mechanism A Work axis P work point

Claims (8)

A rework device that performs an operation of removing a component bonded to a substrate by a bonding material and an operation of mounting a component on the substrate,
A substrate holding part for holding the substrate so that the substrate intersects the work axis;
A work unit having a plurality of work parts including a suction work part for sucking the parts and a heating work part for heating the bonding material;
An observation unit for magnifying and observing a work point where the work axis and the substrate intersect,
In the work unit, the work parts arranged on the work shaft by the plurality of work parts integrally operating along a predetermined track and changing the position of each work part are the plurality of work parts. Selected from the working department,
The observation unit is supported by the rotation mechanism that can rotate about the work axis, and along an arc orbit centered on the work axis as the rotation mechanism rotates. An observation unit body that moves and changes the direction of observing the work point, and
A rework device that performs the work on a single work axis.   The observation unit main body is supported by the rotation mechanism in a posture in which the work point can be observed obliquely from above, and the circular arc while maintaining the observation posture from obliquely upward as the rotation mechanism rotates. The rework apparatus according to claim 1, wherein a direction in which the work point is observed by moving along a trajectory is changed.   The rework apparatus according to claim 1, wherein the observation unit further includes an inclination angle adjustment mechanism capable of changing an inclination angle with respect to a horizontal direction when the observation unit body observes the work point. The work unit further includes a support shaft parallel to the work shaft, and a unit main body supported by the support shaft so as to be rotatable about the support shaft.
The plurality of working portions are supported by the unit main body in a state of being spaced apart from each other along a circumferential direction centered on the support shaft, and the support shaft is rotated with the rotation of the unit main body. The rework device according to any one of claims 1 to 3, wherein the rework device operates integrally along a circular orbit centered at the center.   The rework according to any one of claims 1 to 4, wherein the work unit further includes a fine adjustment mechanism that finely adjusts a position of a work unit arranged on the work axis in the work axis direction. apparatus. A component table on which components for mounting on the substrate are placed;
The parts table is movable between a work position that intersects with the work axis and a retracted position that does not intersect with the work axis, and is rotatable at least 90 ° about the work axis at the work position. The rework apparatus according to any one of claims 1 to 5.   The rework apparatus according to any one of claims 1 to 6, further comprising a laser pointer having an optical axis passing through the work axis.   The rework apparatus according to claim 1, further comprising an auxiliary heating mechanism for auxiliaryly heating the substrate held by the substrate holding unit.

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