CN117282857A - Positioning structure of die for stamping solder ball of electronic component and die provided with same - Google Patents

Abstract

The invention provides a positioning structure of a die for stamping solder balls of an electronic component and a die with the same. The positioning structure of the die is a positioning structure arranged on at least one side of a die (1) provided with an upper die (10) and a lower die (20), and comprises a first component (12) and a second component (13) which are arranged in a lamination manner along a pressing direction, wherein first opposite surfaces (16A, 16B) opposite to each other are arranged between the two components, a first positioning shaft (18) with a circular cross section is arranged on one end side, a first rotating shaft (23) is arranged on the other end side, the cross section of the first rotating shaft (23) is in a non-circular shape with a long diameter part (L) and a short diameter part (S), and the interval size of the first opposite surfaces (16A, 16B) can be changed by rotating the first rotating shaft (23). According to the present invention, a simple positioning structure for setting the parallelism of the upper die and the lower die of the die can be provided.

Description

Positioning structure of die for stamping solder ball of electronic component and die provided with same

Technical Field

The present invention relates to a positioning structure of a die for solder ball stamping of an electronic component and a die having the same.

Background

In order to electrically connect an electronic component (for example, a CPU of a communication terminal such as a smart phone) to a substrate, a solder ball may be used. The solder ball has a very small size and a diameter of about 0.1mm to 0.2 mm. The solder balls need to be precisely positioned by slightly pressing the lower end side (the side fixed to the substrate) before the electronic component and the substrate are fixed.

In a press machine, in order to perform press working with high accuracy, it is required to maintain parallelism between an upper die portion and a lower die portion with high accuracy. As a technique for researching such a positioning structure, patent documents 1 and 2, for example, are known.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2006-205209.

Patent document 2: japanese patent application laid-open No. 2014-104478.

Disclosure of Invention

Technical problem to be solved by the invention

The structures disclosed in patent documents 1 and 2 allow the upper die to swing to a certain extent, thereby maintaining parallelism between the upper die and the lower die during pressing, and thus, they function appropriately depending on the structure of the workpiece. However, the product is not required as long as a predetermined parallelism is maintained between the upper die and the lower die.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a simple positioning structure for setting parallelism between an upper die and a lower die of a die and a die having the same.

Means for solving the problems

In this way, the positioning structure of the die according to the present invention is a positioning structure of a die provided on at least one of an upper die and a lower die in a die having the upper die and the lower die, wherein the die is used in a stamping device for stamping solder balls of an electronic component having solder balls capable of electrically connecting with a substrate, and is characterized in that: the press forming device comprises a first member and a second member which are arranged in an overlapping manner along a press direction, wherein the first member and the second member are provided with a pair of upper and lower first opposite surfaces which are orthogonal to the press direction and are opposite to each other, a first positioning shaft with a circular cross section is arranged at one end side of the first opposite surfaces, a first rotating shaft which is parallel to the first positioning shaft and is in contact with the first member and the second member is arranged at the other end side of the first opposite surfaces, the cross section of the first rotating shaft is formed into a non-circular shape with a long diameter part and a short diameter part, and the size of the interval between the first opposite surfaces can be changed by rotating the first rotating shaft.

When the upper and lower dies are provided before the pressing operation, the first opposing face is sometimes slightly inclined from the direction orthogonal to the pressing direction. In this case, the first rotation axis is rotated in an appropriate direction to a position where the inclination is reduced and the detection is impossible (or where the inclination is reduced and the product is allowed to be within a range). In this way, the parallelism of the upper and lower molds can be easily positioned.

In the above-described aspect, it is preferable that the first member and the second member are each provided with a first bearing groove for supporting the first rotation shaft, and that at least one of wall surfaces constituting the two first bearing grooves has a shape having two first inclined surfaces for supporting the first rotation shaft, and that the first inclined surfaces at two positions and at least three of wall surfaces of the first bearing groove at the other side are in contact with the first rotation shaft, regardless of rotation of the first rotation shaft.

According to this structure, since the first member and the second member are supported at three points, it is difficult to slide even when the first rotation shaft is compressed, and it is easy to maintain the parallel state, as compared with the case of being supported at two points.

In the above aspect, it is preferable that an angle visual check unit indicating a rotational position of the first rotary shaft is provided at an axial end of the first rotary shaft. As the angle visual checking unit, any configuration may be adopted as long as the change is known by the rotation of the first rotation shaft. For example, a specific pattern on a radial line segment which is linear and faces outward from the center is illustrated.

According to the above configuration, the angle visual checking unit indicates the degree of rotation of the first rotation shaft, so that the alignment can be easily performed.

In the above-described aspect, it is preferable that the second member is provided with a third member that is disposed so as to overlap the second member in the pressing direction, that the second member and the third member are provided with a pair of upper and lower second opposing surfaces that are orthogonal to the pressing direction and that the second member and the third member are opposed to each other, that a second positioning shaft having a circular cross section is provided on one end side of the second opposing surfaces in a direction orthogonal to the first positioning shaft, that a second rotating shaft that is parallel to the second positioning shaft and that is in contact with the second member and the third member is provided on the other end side of the second opposing surfaces, that the cross section of the second rotating shaft is formed in a non-circular shape having a long diameter portion and a short diameter portion, and that the size of the interval between the second opposing surfaces can be changed by rotating the second rotating shaft.

According to the above configuration, the first rotation axis is set to the X direction and the second rotation axis is set to the Y direction, so that positioning in the XY plane can be easily performed.

In the above-described aspect, it is preferable that the second member and the third member are each provided with a second bearing groove for supporting the second rotation shaft, and that at least one of wall surfaces constituting the two second bearing grooves has a shape having two second inclined surfaces for supporting the second rotation shaft, and that at least three of the second inclined surfaces at two positions and the wall surface of the second bearing groove at the other side are in contact with the second rotation shaft, regardless of rotation of the second rotation shaft.

In the above aspect, it is preferable that a second angle visual check unit indicating a rotational position of the second rotation shaft is provided at an axial end of the second rotation shaft.

In the above-described structure, it is preferable that at least four bolts are provided in the second member and the third member, the bolts penetrate the second member and the third member in the vertical direction, the positions of the first member, the second member, and the third member are fixed by tightening the bolts in the bolt holes of the first member, and spring members that act in the directions of pressing the first member, the second member, and the third member are provided in the upper end portions of the bolts.

The upper die of the second aspect of the invention is characterized by comprising a first member, a second member, and a third member that are arranged so as to overlap in a pressing direction and constitute the upper die, wherein a pair of upper and lower first opposing surfaces orthogonal to the pressing direction are provided on the first member and the second member, a first positioning shaft having a circular cross section is provided on one end side of the first opposing surfaces in a direction orthogonal to the pressing direction, a first rotating shaft parallel to the first positioning shaft and in contact with the first member and the second member is provided on the other end side of the first opposing surfaces, the first rotating shaft has a non-circular cross section having a long diameter portion and a short diameter portion, and first bearing grooves for supporting the first rotating shaft are provided on the first member and the second member, respectively, the wall surface of at least one side of the wall surfaces constituting the two first bearing grooves is formed in a shape having two first inclined surfaces for supporting the first rotation shaft, and is configured such that, regardless of how the first rotation shaft rotates, at least three of the first inclined surfaces at two places and the wall surface of the first bearing groove at the other side are in contact with the first rotation shaft, a pair of upper and lower second opposing surfaces orthogonal to the pressing direction are provided on the second member and the third member, a second positioning shaft having a circular cross section is provided on one end side of the second opposing surfaces in a direction orthogonal to the first positioning shaft, a second rotation shaft parallel to the second positioning shaft and in contact with the second member and the third member is provided on the other end side of the second opposing surfaces, the cross section of the second rotation shaft is formed in a non-circular shape having a long diameter portion and a short diameter portion, the second member and the third member are respectively provided with a second bearing groove for bearing the second rotating shaft, are formed in a shape having two second inclined surfaces for bearing the second rotating shaft, and are configured such that at least three of the second inclined surfaces at two positions and the wall surface of the second bearing groove at the other side are in contact with the second rotating shaft regardless of the rotation of the second rotating shaft.

In this case, it is preferable that a die member is provided on a lower surface of the first member, the die member determining a shape of the metal material by a pressing operation, and a receiving groove receiving the fixing piece on the first member side is recessed, and a rotating lever is provided on the first member side, the rotating lever being moved in an up-and-down direction between a fixing position where the fixing piece is moved upward to fix the die member to the lower surface of the first member, and a separation position where the die member is removed from the first member by moving the fixing piece downward.

In the upper die, it is preferable that a claw piece is provided on a side of the die member, the claw piece being capable of protruding downward from a lower surface of the die member by being pressed downward, and the claw piece being pressed downward to drop the electronic component toward a lower die when the operation of pressing the electronic component by the die member is completed during the pressing operation and the die member is moved upward.

According to the above invention, the upper die for performing the pressing operation can be easily set to be parallel to the lower die.

Effects of the invention

According to the present invention, the parallelism between the upper die and the lower die can be set extremely precisely and easily when the die for press is provided.

Drawings

Fig. 1 is a side view of the mold of the present embodiment. However, for convenience of explanation, a part is cut off, and a part of the component is deleted.

Fig. 2 is an enlarged view of the virtual circle T in fig. 1.

Fig. 3 is a side view of the mold showing the state in which the rotating rod is rotated downward to detach the mold member.

Fig. 4 is a front view of the mold.

Fig. 5 is an enlarged view of the virtual circle U in fig. 4.

Fig. 6 is a front view of the mold showing the downward Fang Duixuan turning bar rotated to remove the mold members.

Fig. 7 is a top view of the K-K line cross section in fig. 1.

Fig. 8 is a top view of the H-H line section in fig. 1.

Fig. 9 is a bottom view of the mold.

Fig. 10 is an enlarged view of the imaginary ellipse E in fig. 6.

Fig. 11 is a view showing an operation end of the first rotation shaft.

Fig. 12 is a view showing a mode (a) in which the angle visual checking portion of the first rotation axis is horizontal and the interval size of the first opposing surface is minimized, and a mode (B) in which the angle visual checking portion is vertical and the interval size of the first opposing surface is maximized, in the imaginary ellipse E in fig. 6.

Fig. 13 is a diagram showing a mode (a) in which the angle visual checking portion of the second rotation axis is horizontal and the distance between the second opposing surfaces is minimized and a mode (B) in which the angle visual checking portion is vertical and the distance between the second opposing surfaces is maximized, respectively, in the imaginary ellipse F in fig. 1.

Fig. 14 is a diagram showing the operation of the separating device in press working. The "a" is a view showing how the mold member is separated from the lower die before the pressing operation, (B) is a view when the mold member presses the electronic component, (C) is a view showing how the electronic component starts to move upward with the electronic component mounted on the lower surface of the mold member after the pressing operation, and (D) is a view showing how the separating device separates the electronic component.

Description of the reference numerals

1 … die, 10 … upper die, 11 … die part, 12 … first part, 13 … second part, 14 … third part, 16A, 16B … first opposite face, 18 … first positioning shaft, 20 … lower die, 21 … shaft groove (first bearing groove), 22 … trapezoid groove (first bearing groove), 22A, 22B … first inclined face (first bearing groove), 22C … bottom face, 23 … first rotation shaft, 23B … angle visual confirmation portion, 24 … bearing member (wall face), 49 … second positioning shaft, 50A, 50B … second opposite face, 51 … second rotation shaft, 51B … angle visual confirmation portion, 53 … shaft groove (second bearing groove), 54 … trapezoid groove (second bearing groove), 54A, 54B … second inclined face, 54C … bottom face, 55 … bearing member (wall face), L … long diameter portion, S … short diameter portion, 70A, 71A, 70B, 72B and 72.

Detailed Description

Next, an embodiment of the present invention will be described with reference to the drawings. The technical scope of the present invention is not limited to these embodiments, and can be implemented in various modes without changing the gist of the present invention.

Fig. 1 shows a side view of a die 1 in a press. The pressing device is used to press solder balls provided on the back side (the side electrically connected to a substrate (motherboard)) of the electronic component 80 (in the present embodiment, a CPU for a smart phone used for a fifth generation communication system) before a soldering operation, thereby precisely positioning and fixing the solder balls. In this pressing operation, the solder ball is not entirely crushed, but is pressed to a degree that slightly deforms the tip.

The mold 1 is divided into an upper mold 10 disposed above and a lower mold 20 disposed below. When the die 1 performs the press working of the plate-like electronic component 80, the upper die 10 is moved vertically upward with respect to the lower die 20 and pressed (punched) in a state in which the electronic component 80 is disposed between the upper and lower dies, whereby the tip of the solder ball (not shown) located on the upper surface side of the electronic component 80 is slightly press-shaped. In the press working, the upper die 10 and the lower die 20 must be held precisely horizontally. In particular, in the case of precision machining, the allowable slope in the state where the upper and lower dies are combined is set to several tens of micrometers or less. Therefore, it is an important point to align the upper die 10 and the lower die 20 with the horizontal position in advance at the time of press working.

In the upper die 10, a plurality of members are combined at predetermined positions, and each member is fixed by a predetermined bolt. A first member 12 is provided at the lowermost portion of the upper die 10, the first member 12 having a die member 11 for pressing solder balls of the electronic component 80, a plate-like second member 13 is provided above the first member, and a plate-like third member 14 is provided above the second member. A holder 15 having a handle is provided at an upper portion of the third member 14. The holder 15 is fixed to a press device, not shown.

Bolts 31A to 31D and 41A to 41D are provided to fix the members 12 to 15 to each other at predetermined positions. The bolts 41A to 41D pass through the through holes 15A to 15D on the retainer 15 side and are screwed into the bolt holes 40A to 40D of the third member 14.

The bolts 31A to 31D pass through the through holes 37A to 37D, 38A to 38D penetrating the second member 13 and the third member 14 in the vertical direction, respectively, and are screwed into the bolt holes 30A to 30D of the first member 12. As shown in fig. 2, washers 32A to 32D are provided near the upper ends of the bolts 31A to 31D, and spiral spring members 29A to 29D are provided between the washers 32A to 32D and the upper surface of the third member 14. The spring members 29A to 29D function to press the second member 13 and the third member 14 in the direction of the first member 12 downward at all times.

A mold member 11 is fixed to the lower surface of the first member 12. The mold member 11 is formed slightly smaller in the left-right direction as shown in fig. 1 than the length of the electronic component 80, and left and right end portions of the electronic component 80 are slightly exposed from the mold member 11 at the time of the pressing operation. The mold member 11 is formed in a substantially rectangular parallelepiped shape, and is provided at the center of its upper surface with a positioning groove portion 43 that receives a positioning protrusion 42 protruding from the lower surface of the first member 12. As shown in fig. 1, receiving grooves 44A and 44B open laterally are provided near the upper ends of the pair of right and left side surfaces of the mold member 11. The fixing pieces 45A, 45B provided near the lower end of the first member 12 can be assembled in the receiving grooves 44A, 44B. As shown in fig. 3, the fixing pieces 45A, 45B are fixed to the lower surface sides of the fixing wings 47A, 47B protruding from the lower end of the first member 12 by fixing bolts 46A, 46B.

The fixing bolts 46A and 46B are provided at their upper ends with rotary rods 48A and 48B rotatable about an axial center 56 in the vertical direction. The fixing bolts 46A and 46B can be moved slightly in the up-down direction by rotating the rotating rods 48A and 48B. Fixing edges 60A, 60B extending in the radial direction are provided at the lower ends of the fixing bolts 46A, 46B. Further, inner cylindrical members 61A and 61B and outer cylindrical members 62A and 62B are provided on the outer peripheries of the fixing bolts 46A and 46B.

Separation devices 70A, 71A, 72A, 70B, 71B, 72B are provided on the lower surface side of the fixing pieces 45A, 45B. The separation device is provided with: downward facing jaws 70A, 70B; shaft portions 71A and 71B for fixing the claw pieces 70A and 70B so as to slightly move up and down (rotationally move) in the direction shown by the drawing K; and spring members 72A, 72B that press the claw pieces 70A, 70B downward. Before the pressing operation, the front ends of the claw pieces 70A and 70B slightly protrude downward from the lower surface of the die member 11.

Spring members 65A, 65B are assembled between the protruding edges 63A, 63B of the upper ends of the outer tube members 61A, 61B and the protruding edges 64A, 64B of the upper ends of the inner tube members 61A, 61B. Further, slide groove portions 66A, 66B capable of receiving the fixing bolts 46A, 46B are provided in the center of the fixing pieces 45A, 45B. As shown in fig. 1 and 4, when the rotating rods 48A and 48B are positioned at the upper fixing positions, the fixing bolts 46A and 46B are moved upward to move the fixing pieces 45A and 45B upward, and the fixing pieces 45A and 45B are fixed to the receiving grooves 44A and 44B, whereby the metal part 11 and the first part 12 are fixed together. On the other hand, as shown in fig. 3 and 6, when the rotary rods 48A, 48B are positioned at the laterally open positions, the fixing bolts 46A, 46B and the fixing edges 60A, 60B move downward, and the fixing pieces 45A, 45B can slide outward through the sliding groove portions 66A, 66B. Therefore, by sliding the fixing pieces 45A, 45B in the directions indicated by the arrows X1, X2 in fig. 3, the fixing pieces 45A, 45B are disengaged from the receiving grooves 44A, 44B, and the metal member 11 can be detached downward as indicated by the arrow Y in fig. 3.

The first opposed surface 16A (first member side) and the first opposed surface 16B (second member side) orthogonal to the pressing direction are provided at the positions where the first member 12 and the second member 13 are opposed to each other (the first opposed surfaces 16A and 16B are opposed to each other at very close positions, but are not in contact with the entire surface, and the second opposed surfaces 50A and 50B are also in the same state). As shown in fig. 4, a first positioning shaft 18 having a circular cross section is provided on one end side (right side in the drawing) of the first opposing surfaces 16A, 16B. Bearing grooves 19A, 19B having a semicircular cross section are provided on both sides of the first opposing surfaces 16A, 16B at positions where the first positioning shafts 18 are fitted. The diameter of the bearing grooves 19A, 19B opening to the first opposing faces 16A, 16B is slightly smaller than the diameter of the first positioning shaft 18, and the bearing grooves 19A, 19B and the first positioning shaft 18 are in surface contact with each other, thereby reducing the surface pressure at the time of the punching operation. Similarly, the depth of the receiving grooves 19A, 19B is set to be slightly smaller than the radius of the first positioning shaft 18, and a slight gap is provided between the first opposing faces 16A, 16B when the first positioning shaft 18 is mounted between the two members 12, 13. Since the first positioning shaft 18 has a circular cross section, the size of the interval between the first opposing faces 16A, 16B does not change even when it rotates.

In contrast, the first rotary shaft 23 is provided parallel to the first positioning shaft 18 on the other end side (left side in fig. 4) of the first opposing surfaces 16A, 16B. As shown in fig. 10, the first rotary shaft 23 is in contact with the bearing member 24 provided at the bottom of the shaft groove 21 and the first inclined surfaces 22A, 22B of the trapezoidal groove 22 (the shaft groove 21 and the trapezoidal groove 22 correspond to the first bearing groove of the present invention). The side surface of the shaft groove 21 is rectangular, and a plate-shaped bearing member 24 having high rigidity is provided at a portion of the bottom thereof that abuts against the first rotary shaft 23. The carrier 24 is prepared by preparing a plurality of carriers having different widths and thicknesses, and by selecting an appropriate carrier for use, the inclination that cannot be adjusted by the rotation of the first rotation shaft 23 can be adjusted. The width of the shaft groove 21 opening at the first opposing surface 16A is set larger than the diameter of the first rotary shaft 23. A wrench groove 23A in which a hexagonal wrench for easily rotating the shaft is assembled is provided in an end surface of the first rotation shaft 23. In the second member 13, an angle scale 25 is provided on the outer side surface of the first inclined surface 22A so that the rotational position of the first rotary shaft 23 can be visually checked in detail. The angle scale 25 is formed by dividing the right lateral direction (0 degrees) to the upper direction (90 degrees) appropriately (for example, a large scale of 10 degrees and longer, and a small scale of 5 degrees and shorter).

Three groove-shaped angle visual confirmation portions 23B are provided on the end surface of the first rotation shaft 23 so as to cross the wrench groove 23A in the diameter direction. As shown in fig. 11, the cross section of the first rotation shaft 23 is formed in a non-circular shape (more specifically, a substantially elliptical shape or an oblong shape) having a long diameter portion L and a short diameter portion S (L > S). The angle visual inspection portion 23B is provided in a direction coincident with the long diameter portion L. In fig. 12, the first rotation shaft 23 is not in contact with the bottom surface 22C located at the uppermost side of the trapezoidal groove 22, and the two first inclined surfaces 22B, 22B of the trapezoidal groove 22 are in contact with the first rotation shaft 23 and are carried at two points (T1, T2). On the other hand, in the shaft groove 21, contact is made at a point of the carrier member 24 (T3). Thus, the first rotation shaft 23, the first member 12, and the second member 13 are supported at three points (T1 to T3) regardless of the rotation position of the first rotation shaft 23. Therefore, even when the first rotation shaft 23 is compressed, it is difficult to slide, and the parallel state is easily maintained, as compared with the case of carrying at two points.

As shown in fig. 1 and 3, end plates 35 for preventing axial displacement of the shafts 49 and 51 and a pair of bolts 36 for fixing the same are provided at both ends of the second positioning shaft 49 and the second rotating shaft 51 (for convenience of illustration, only members located on the opposite side of the broken line are shown in fig. 1, but the same members are provided on the near side). The end plate 35 fixes the end positions of the two shafts 49, 51 by one piece, and opens the spanner groove 51A. Therefore, even in a state where the end plate 35 is fixed, the second rotation shaft 51 can be rotated.

As shown in fig. 4 and 6, end plates 33 for preventing the axial displacement of the shafts 18 and 23 and bolts 34 for fixing the same are provided at both end portions of the first positioning shaft 18 and the first rotation shaft 23 (for convenience of illustration, only members located on the opposite side are shown by broken lines in fig. 4 and 6, but the same members are provided on the near side). The end edges of the end plate 33 fix the end positions of the two shafts 18, 23 and open the wrench groove 23A. Therefore, even in a state where the end plate 33 is fixed, the first rotation shaft 23 can be rotated.

As shown in fig. 12, when the first rotation shaft 23 is mounted between the shaft groove 21 and the trapezoidal groove 22, a slight gap is provided between the first opposing faces 16A, 16B. Fig. 12 (a) shows a state where the distance between the first opposing surfaces 16A and 16B is the smallest. If the first rotation shaft 23 is rotated in either the left or right direction in this state, the distance between the first opposing surfaces 16A and 16B changes so as to slightly increase due to the difference in length between the long diameter portion L and the short diameter portion S. Since the direction of the angle visual inspection portion 23B coincides with the direction of the long diameter portion L, when the interval size is to be increased, the angle visual inspection portion 23B may be rotated toward the longitudinal direction, and when the interval size is to be reduced, the angle visual inspection portion 23B may be rotated toward the lateral direction. Fig. 12 (B) shows a state where the distance between the first opposing surfaces 16A and 16B is maximized. That is, the size of the gap between the first opposing surfaces 16A and 16B is changed between (a) in fig. 12 and (B) in fig. 12.

Next, a positioning structure provided at a position where the second member 13 and the third member 14 face each other will be described. A second opposing surface 50A (second member side) and a second opposing surface 50B (third member side) orthogonal to the pressing direction are provided at the positions where the two members 13, 14 oppose each other. As shown in fig. 1, a second positioning shaft 49 having a circular cross section is provided on one end side (left side in the drawing) of the second opposing surfaces 50A, 50B. The second positioning shaft 49 is provided in a direction orthogonal to the first positioning shaft 18. A second rotation shaft 51 is provided on the other end side of the second opposing surfaces 50A, 50B in a direction parallel to the second positioning shaft 49. In this way, the XY plane is formed by setting the first rotation axis 23 to the X direction and setting the second rotation axis 51 to the Y direction (in addition, the pressing direction (up-down direction) is the Z direction).

The structure and function of the bearing grooves 52A, 52B fixing the second positioning shaft 49 are the same as those of the bearing grooves 19A, 19B fixing the first positioning shaft 18. Note that the structures (i.e., the shaft groove 53, the carrier 55, the key groove 51A, the angle visual checking portion 51B, the second inclined surfaces 54A and 54B of the trapezoidal groove 54, the bottom surfaces 54C, and the contact points (U1 to U3)) and their functions provided around the second rotary shaft 51 are the same as those provided around the first rotary shaft 23 (i.e., the shaft groove 21, the carrier 24, the key groove 23A, the angle visual checking portion 23B, the first inclined surfaces 22A and 22B of the trapezoidal groove 22, the bottom surfaces 22C, and the contact points (T1 to T3)) and their functions, and therefore, reference numerals are given in fig. 13 and the description thereof is omitted.

When the first rotation shaft 23 or the second rotation shaft 51 is rotated left and right to slightly change the distance between the first opposing surfaces 16A, 16B or the second opposing surfaces 50A, 50B, the second member 13 and the third member 14 are always pressed downward by the spring members 29A to 29D provided in the bolts 31A to 31D, so that the adjustment effort and time are reduced.

Fig. 14 shows the operation of the separating devices 70A, 71A, 72A, 70B, 71B, 72B when the electronic component 80 is subjected to press working.

With the above configuration, after the upper die 10 and the lower die 20 are precisely brought into a horizontal state, as shown in fig. 14 (a), the electronic component 80 is mounted on the upper surface of the lower die 20. At this time, the claw pieces 70A, 70B are pressed downward by the spring members 72A, 72B.

Next, as shown in fig. 14 (B), the upper die 10 is moved downward, and a pressing operation is performed so as to apply a predetermined pressure to the solder balls of the electronic component 80. At this time, the claws 70A and 70B are pressed by the upper surface of the electronic component 80 and move to the substantially same position as the lower surface of the mold member 11.

When the pressing operation is completed, the upper die 10 moves upward. Here, when the adhesion between the mold member 11 and the electronic component 80 is weak, the electronic component 80 is still placed on the upper surface of the lower mold 20, and therefore, the process proceeds directly to the next step. However, in the case where the mold member 11 and the electronic component 80 are attached together, as shown in (C) of fig. 14, the electronic component 80 is intended to move upward in a state of being attached to the lower surface side of the mold member 11. Here, since the claw pieces 70A and 70B are intended to move downward by the elastic force of the spring members 72A and 72B, the electronic component 80 is pressed from the lower surface side of the mold member 11 by the force, and the electronic component 80 falls onto the upper surface of the lower mold 20 as shown in fig. 14 (D).

In this way, the electronic component 80 is separated to a predetermined position by the separating devices 70A, 71A, 72A, 70B, 71B, 72B.

As described above, according to the present embodiment, when the press die 1 is provided, only the first rotation shaft 23 and the second rotation shaft 51 may be rotated in order to set the parallelism between the upper die 10 and the lower die 20.

In addition, even if the electronic component 80 is attached to the lower surface side of the mold member 11 after the pressing operation, it can be dropped to the upper surface of the lower mold 20 by the separating devices 70A, 71A, 72A, 70B, 71B, 72B.

In the present embodiment, the positioning structure is arranged on the upper die 10, but according to the present invention, the positioning structure may be arranged on the lower die.

In the present embodiment, the trapezoidal grooves 22, 54 have a trapezoidal cross section, but the shape of the cross section is not limited to this, and may be other polygonal shapes, oblong shapes, or the like, as long as they have two inclined surfaces according to the present invention.

Claims (10)

1. A positioning structure of a die, provided on at least one of an upper die and a lower die in a die having the upper die and the lower die, wherein the die is used in a stamping device for solder ball stamping of an electronic component having a solder ball capable of electrically connecting with a substrate, the positioning structure of the die characterized in that:

the press forming device comprises a first member and a second member which are arranged in an overlapping manner along a press direction, wherein the first member and the second member are provided with a pair of upper and lower first opposite surfaces which are orthogonal to the press direction and are opposite to each other, a first positioning shaft with a circular cross section is arranged at one end side of the first opposite surfaces, a first rotating shaft which is parallel to the first positioning shaft and is in contact with the first member and the second member is arranged at the other end side of the first opposite surfaces, the cross section of the first rotating shaft is formed into a non-circular shape with a long diameter part and a short diameter part, and the size of the interval between the first opposite surfaces can be changed by rotating the first rotating shaft.

2. The positioning structure of a mold according to claim 1, wherein:

the first member and the second member are respectively provided with a first bearing groove for bearing the first rotation shaft, and the wall surface of at least one side of the wall surfaces forming the two first bearing grooves is provided with two first inclined surfaces for bearing the first rotation shaft, and the first inclined surfaces at two positions and at least three positions of the wall surfaces of the first bearing grooves at the other side are contacted with the first rotation shaft no matter how the first rotation shaft rotates.

3. A positioning structure of a mold according to claim 1 or 2, characterized in that:

an angle visual confirmation portion that indicates a rotational position of the first rotary shaft is provided at an axial end of the first rotary shaft.

4. A positioning structure of a mold according to any one of claims 1 to 3, wherein:

the second member is provided with a third member that is disposed so as to overlap the second member in the pressing direction,

the second member and the third member are provided with a pair of upper and lower second opposed surfaces which are orthogonal to the pressing direction and are opposed to each other, a second positioning shaft having a circular cross section is provided on one end side of the second opposed surfaces in a direction orthogonal to the first positioning shaft, a second rotating shaft which is parallel to the second positioning shaft and is in contact with the second member and the third member is provided on the other end side of the second opposed surfaces, and the cross section of the second rotating shaft is formed in a non-circular shape having a long diameter portion and a short diameter portion, and the size of the interval between the second opposed surfaces can be changed by rotating the second rotating shaft.

5. The positioning structure of a mold according to any one of claims 1 to 4, characterized in that:

the second member and the third member are respectively provided with a second bearing groove for bearing the second rotating shaft, and the wall surfaces of at least one side of the wall surfaces forming the two second bearing grooves are provided with two second inclined surfaces for bearing the second rotating shaft, and the wall surfaces of the second inclined surfaces at two positions and the wall surfaces of the second bearing groove at the other side are contacted with the second rotating shaft no matter how the second rotating shaft rotates.

6. The positioning structure of a mold according to any one of claims 1 to 5, characterized in that:

a second angle visual confirmation portion indicating a rotation position of the second rotation shaft is provided at an axial end of the second rotation shaft.

7. The positioning structure of a mold according to any one of claims 4 to 6, characterized in that:

at least four bolts are provided in the second and third members, the bolts penetrate the second and third members in the vertical direction, the positions of the first, second and third members are fixed by tightening the bolts in the bolt holes of the first member, and spring members acting in the direction of pressing the first, second and third members are provided in the upper end portions of the bolts.

8. An upper side die, characterized in that:

comprises a first member, a second member, and a third member which are arranged in an overlapping manner along the pressing direction and form the upper die,

the first member and the second member are provided with a pair of upper and lower first opposing surfaces orthogonal to the pressing direction, a first positioning shaft having a circular cross section is provided on one end side of the first opposing surfaces in a direction orthogonal to the pressing direction, a first rotating shaft parallel to the first positioning shaft and abutting the first member and the second member is provided on the other end side of the first opposing surfaces, the cross section of the first rotating shaft is formed in a non-circular shape having a long diameter portion and a short diameter portion,

the first member and the second member are respectively provided with a first bearing groove for bearing the first rotation shaft, at least one of wall surfaces constituting the two first bearing grooves is formed in a shape having two first inclined surfaces for bearing the first rotation shaft, and is configured such that at least three of the first inclined surfaces at two positions and the wall surface of the first bearing groove at the other side are in contact with the first rotation shaft regardless of rotation of the first rotation shaft, and,

a pair of upper and lower second opposed faces orthogonal to the pressing direction are provided on the second member and the third member, a second positioning shaft having a circular cross section is provided on one end side of the second opposed faces in a direction orthogonal to the first positioning shaft, a second rotating shaft parallel to the second positioning shaft and abutting the second member and the third member is provided on the other end side of the second opposed faces, the second rotating shaft has a non-circular cross section having a long diameter portion and a short diameter portion,

the second member and the third member are respectively provided with a second bearing groove for bearing the second rotating shaft, are formed in a shape having two second inclined surfaces for bearing the second rotating shaft, and are configured such that at least three of the second inclined surfaces at two positions and the wall surface of the second bearing groove at the other side are in contact with the second rotating shaft regardless of the rotation of the second rotating shaft.

9. The upper die of claim 8, wherein:

a die part which determines the shape of the metal material by a punching operation and is provided with a receiving groove for receiving the fixing piece of the first part side is provided on the lower surface of the first part,

the first member is provided with a rotating lever that moves the fixing piece in the vertical direction between a fixing position at which the fixing piece is moved upward to fix the mold member to the lower surface of the first member, and a separation position at which the fixing piece is moved downward to detach the mold member from the first member.

10. The upper die of claim 8, wherein:

a claw piece is provided on a side of the mold member, and the claw piece can protrude downward from a lower surface of the mold member by being pressed downward,

when the operation of pressing the electronic component by the die member is completed and the die member moves upward in the pressing operation, the electronic component is lowered toward the lower die by the claw pieces pressing the electronic component downward.