Horizontal securing jig for press apparatus and horizontal securing method using the jig

Abstract

To provide a horizontal securing jig for a press apparatus and a horizontal securing method using the jig.SOLUTION: A horizontal securing jig for a press apparatus is a jig for securing horizontality between an upper die and a lower die of a press die in the press apparatus, that includes: a measurement unit capable of converting degrees of horizontality in XY directions into respective electrical signals for measurement; a zero-setting master unit that defines a predetermined reference zero point by clamping the measurement unit; and a display unit that digitally displays the electrical signals output from the measurement unit. The display unit is provided with a zero-point storage unit that stores a position when the reference zero point is achieved.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a jig for ensuring levelness of a press machine and a method for ensuring levelness using this jig. [Background technology]

[0002] For example, when manufacturing electronic circuit boards used in communication terminals such as smartphones, solder balls are sometimes used to electrically connect the electronic circuit board and CPU. Before fixing the electronic circuit board and CPU with solder balls, the solder balls must be lightly pressed into a predetermined position on the electronic circuit board using a press device to ensure precise positioning. Since the diameter of the solder balls is very small, around 0.1 to 0.2 mm, the allowable error in the press process is only a few microns. In order to perform high-precision press working in a press machine, it is necessary to maintain the parallelism between the upper and lower mold parts with high precision. Patent Document 1, for example, is an example of an ingenious positioning structure for such a press machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-312175 Summary of the Invention [Problem to be solved by the invention]

[0004] The jig shown in Patent Document 1 attempts to ensure parallelism by using a spherical joint, but there is still room for further improvement. Another conventional method is to sandwich pressure-sensitive paper between the upper and lower molds and press it, then check the parallelism by observing the color change of the pressure-sensitive paper.

[0005] However, this method requires multiple administrations, and requires running costs due to the use of disposable pressure-sensitive paper. The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a leveling jig that can digitally check the level of a press machine, and a leveling method using this jig. [Means for solving the problem]

[0006] Thus, the jig for ensuring horizontality in a press machine according to the present invention is a jig for ensuring horizontality between the upper and lower molds of a press die in a press machine, and is characterized in that it comprises a measurement unit that can convert the horizontality in the X and Y directions into electrical signals and measure them, a zero-regulating master unit that defines a predetermined reference zero point by clamping the measurement unit, and a display unit that digitally displays the electrical signal output from the measurement unit, and the display unit is provided with a zero-point memory section that stores the position when the reference zero point is reached.

[0007] The X and Y directions may be different directions and do not necessarily need to intersect perpendicularly. However, if they are perpendicular, it becomes easier to ensure the horizontality of the upper and lower molds more precisely, which is a preferred embodiment. According to the above invention, the upper and lower dies of the press die can be checked on a digital display using the measurement unit. In this case, it is preferable that the measurement unit is provided with a pair of flat plate-like members, and that an elastic member that presses the two flat plate-like members in a direction separating them from each other and a locking member that keeps the two flat plate-like members separated at an initial position at a distance greater than the reference zero point are provided between the two flat plate-like members.

[0008] According to the above invention, the pair of flat plate-like members are always pressed in the separating direction by the elastic member and held in the initial position by the locking member, and are moved to the reference zero point while being pressed in the compressing direction. Another invention relates to a method for ensuring horizontality, which uses the above-mentioned jig for ensuring horizontality to ensure horizontality between the upper and lower dies of a press die, and is characterized by comprising: (A) a zero point storage step for storing a reference zero point in the zero point storage section of the display unit; (B) a measurement unit placement step for placing the measurement unit on the upper surface of the lower die; (C) a pressing step for lowering the upper die to a certain position and pressing the measurement unit; and (D) a horizontality assurance step for adjusting the horizontality in the XY directions until it falls within a predetermined range by operating the fine adjustment section of the press device. According to the above invention, the press die can be set to a predetermined parallel range digitally and more quickly than with conventional methods using a horizontal securing jig. [Effects of the Invention]

[0009] According to the present invention, when setting up a press die, the parallelism between the upper die and the lower die can be set extremely precisely using a digital display. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic diagram of a horizontal securing jig according to the present embodiment. [Figure 2] FIG. 1 is an exploded view of the zero regulation master unit. [Figure 3] FIG. 10 is a perspective view of the zero regulation master unit before the upper disk is assembled. [Figure 4] FIG. 10 is a side view of the measurement unit with one fixing screw removed. [Figure 5] FIG. 2 is a plan view of the measurement unit. [Figure 6] FIG. 2 is a bottom view of the measurement unit. [Figure 7] FIG. 2 is a bottom view of the measurement unit with the lower flat plate member removed. [Figure 8] The cross-sectional view taken along line AA in FIG. 5 shows the state before the fixing screws are installed. [Figure 9] FIG. 6 is a cross-sectional view taken along line AA in FIG. 5.

[0011] [Figure 10] 10 is a cross-sectional view of the measurement unit when clamped by the zero reference master unit. FIG. [Figure 11] 10 is a flowchart of a zero point storage process. [Figure 12] FIG. 10 is a side cross-sectional view of the measurement unit and the zero regulation master unit assembled together to explain the zero point storage process. [Figure 13] 13 is a side cross-sectional view of the zero regulation master unit in FIG. 12 when it is tightened. FIG. [Figure 14] 10 is a flowchart illustrating a method for ensuring horizontality. [Figure 15] FIG. 10 is a side view illustrating a measurement unit placing step. [Figure 16] FIG. 1 is a side view (1) illustrating the horizontal securing step. [Figure 17] FIG. 10 is a side view (2) illustrating the horizontal securing step. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, embodiments 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 various embodiments can be implemented without departing from the spirit of the invention. 1 shows an overview of a jig 1 for ensuring levelness of a press machine according to this embodiment (hereinafter simply referred to as "jig 1"). This jig 1 is equipped with a measurement unit 2 that can convert the levelness in the X and Y directions into electrical signals and measure them, a zero setting master unit 3 that defines a predetermined reference zero point by clamping this measurement unit 2, and a display unit 4 that digitally displays the electrical signal output from the measurement unit 2. An electric wire W that transmits the electrical signal is connected between the measurement unit 2 and the display unit 4.

[0013] The display unit 4 is provided with display sections 31 and 32 that digitally display the electrical signals output from the measurement unit 2 for each of the X and Y directions, reset switches 33A to 33D that reset the digital display to zero (0.0000) when specifying the reference zero point, a power switch 34, and a zero point memory section 4A. The digital display can show ± and up to four decimal places (±0.0000). This display is designed to show a range that is at least one digit smaller than the tolerance range (0.001 to -0.001) for levelness required for press working.

[0014] 2 and 3, the zero setting master unit 3 is provided with a pair of substantially identical disk-shaped upper and lower plate portions 5 and 6, four cylindrical members 7 connecting the plate portions 5 and 6, and screw members 8 and 9 that are turned from above and below onto each of the cylindrical members 7. An operation hole 8A is provided on the upper end surface of the screw member 8 for tightening with a hexagonal nut. Although not shown, an operation hole is also provided on the end surface of the tightening portion 12 of the screw member 9 for tightening with a hexagonal nut. The upper plate 5 has through holes 10 that open in the thickness direction at equal distances from the center and spaced 90 degrees apart. The through holes 10 allow the threaded portions of the screw members 8 to pass through. The lower plate 6 has screw assembly holes 11 at positions corresponding to the through holes 10. The lower surface of the screw assembly holes 11 is opened large enough to receive the fastening portions 12 of the screw members 9, and the upper surface is opened small enough to receive the shanks 13 of the screw members 9. The cylindrical member 7 has threaded holes 14 of the same diameter that open along its length. The length M of the cylindrical member 7 is manufactured with extremely precise specifications. When the measurement unit 2 is sandwiched between the plates 5 and 6, the length M of the cylindrical member 7 determines the reference zero point of the measurement unit 2. As shown in FIG. 3, the zero setting master unit 3 has the cylindrical member 7 placed in the screw assembly hole 11 on the upper surface of the lower plate portion 6, and the screw member 9 screwed in from below.

[0015] 4 to 7 show the structure of the measurement unit 2. The measurement unit 2 is provided with a pair of flat plate-like members 15, 16, and four fixing screws 17 are threaded between the two members 15, 16. A large-diameter, disk-shaped operating portion 18 is provided at the upper end of the fixing screw 17, and a cylindrical portion 19 with a smaller diameter than the operating portion 18 is provided below and in the middle, and a threaded portion 20 with a smaller diameter than the cylindrical portion 19 is provided at the lower end. An operating hole 18A is provided at the upper edge of the operating portion 18 for tightening with a hexagonal nut. The operating holes 8A, 18A (and the operating hole of the screw member 9) have the same diameter so that they can be operated with the same hexagonal nut. In addition, a tapered inclined surface 18B is provided on the underside of the operating portion 18. This inclined surface 18B abuts against a locking edge 23 (described later). Around the cylindrical portion 19, a disc spring 29 (elastic member) is provided to press the members 15 and 16 in directions separating them from each other.

[0016] A first pressing portion 25 having substantially the same shape as an upper die 24 of the press machine is provided in the center of the flat plate-like member 15, and four positioning holes 22 are provided in the first pressing portion 25 so that the fixing screws 17 can be attached thereto. As shown in Figure 8, a sloped locking edge 23 is provided at the middle of the depth position of the positioning holes 22 so that the sloped surface 18B of the operating portion 18 can be locked thereto. A second pressing portion 27 having substantially the same shape as the lower die 26 is provided in the center of the other side of the flat plate-like member 16. The second pressing portion 27 is provided with four screw holes 28 into which the screw portions 20 can be screwed. In addition, a restricting protrusion 38 is protruded from the center of the second pressing portion 27 to restrict the flat plate-like member 15 from being pressed more than necessary. Furthermore, measuring members 30 are provided at the four corners of the flat-plate member 15, facing the other flat-plate member 16. The measuring members 30 are, for example, differential transformer type distance measuring devices, and can measure the horizontality in the orthogonal X and Y directions in the measuring unit 2 by converting them into electrical signals. The data measured by the measuring members 30 is transmitted to the display unit 4 via the electric wires W. In the measurement unit 2, an insertion hole 39 is provided at an inner position of the measurement member 30, into which the cylindrical member 7 of the zero regulation master unit 3 can be inserted.

[0017] Fig. 8 shows the state before the fixing screw 17 is installed, and Fig. 9 shows the state after the fixing screw 17 is installed. When the fixing screw 17 is completely screwed into the positioning hole 22, the locking edge 23 and the inclined surface 18B come into surface contact, and the disc spring 29 is slightly elastically deformed, so that the two members 15, 16 are always pressed in directions separating from each other. In the initial position where the fixing screw 17 is screwed into the positioning hole 22, the separation distance L from the first pressing portion 25 to the second pressing portion 27 is set slightly larger than the separation distance M (= the length of the cylindrical member 7) between the two pressing portions 25, 26 at the reference zero point (L>M). 10 shows the state of the measurement unit 2 when it is clamped and fixed by the zero-regulating master unit 3 up to a predetermined reference zero point, thereby elastically deforming the disc spring 29 in the direction of compression. At this reference zero point, the engagement edge 23 and the inclined surface 18B are no longer in contact with each other, and the upper end of the restricting protrusion 38 is separated from the lower surface of the flat plate-like member 15. At this time, the separation distance M from the first pressing portion 25 to the second pressing portion 27 determines the horizontality at the reference zero point.

[0018] Next, a method for ensuring horizontality between the upper die 24 and the lower die 26 of the press die will be described using this embodiment configured as described above. <Zero point memory process> The zero point storage step will be described with reference to FIGS. As shown in the flowchart of FIG. 11, the power switch 34 of the display unit 4 is turned on, enabling the electrical signal output from the measurement unit 2 to be displayed digitally (S100). Separately, the cylindrical member 7 is placed on the upper surface side of the screw assembly hole 11 of the lower plate portion 6, and the screw member 9 is turned from the lower surface side. Here, the cylindrical member 7 and the screw member 9 are assembled in a predetermined position, and the fastening portion 12 is housed inside the screw assembly hole 11 (S110). Next, the measurement unit 2 is placed in its initial position on the upper surface of the lower plate portion 6 (S120).

[0019] 12, the upper plate portion 5 is placed on the upper side of the cylindrical member 7. At this time, the position of the through-hole 10 of the upper plate portion 5 is aligned with the position of the cylindrical member 7 (S130). Since the height (separation distance L) of the measurement unit 2 in the initial position is higher than the height M of the cylindrical member 7, the upper plate portion 5 is positioned slightly higher than the cylindrical member 7. 13, the screw member 8 is inserted into the through hole 10 of the upper plate portion 5 and tightened to a predetermined position in the screw hole 14 of the cylindrical member 7 (S140). At this reference zero point, the disc spring 29 is elastically deformed so as to be compressed inside the measurement unit 2, and the locking edge 23 and the inclined surface 18B are disengaged from each other. In this position, the reset switches 33A to 33D are pressed to store the reference zero point in the zero point storage unit 4A (S150).

[0020] In this way, by using the zero regulation master unit 3, it becomes possible to digitally display how much pressure the measurement unit 2 must be pressed to ensure a predetermined horizontal position. After the reference zero point of the measuring unit 2 is stored in the display unit 4 as described above, the measuring unit 2 is removed from the zero setting master unit 3. Then, the elastic force of the disc spring 29 causes the upper flat plate member 15 to return to its initial position. At this time, the inclined surface 18B and the engaging edge 23 are in inclined contact with each other, making it easier to return to the initial position compared to a configuration in which they abut horizontally. Furthermore, the zero setting master unit 3 is no longer necessary until the reference zero point is stored again. In the measurement unit 2 that has stored the reference zero point, the stored reference zero point is referenced each time the power switch 34 is pressed, and the real-time measurement value of the measuring member 30 is displayed on the display units 31 and 32. Note that the position of the reference zero point is maintained as stored in the zero point memory unit 4A until the reset switches 33A to 33D are pressed again.

[0021] <How to use the measurement unit and display unit that store the reference zero point> Next, how to use both units 2 and 4 will be described with reference to FIGS. As shown in the flowchart of FIG. 14 and FIG. 15, the measuring unit 2 used to store the reference zero point is placed on the upper surface of the lower mold 26 of the mold (S200: measuring unit placing step). At this point, the power switch 34 of the display unit 4 is turned on, and measurement by the measurement unit 2 begins (S210). Next, the press device 35 is operated to lower the upper mold 24 to a certain position, and the upper and lower molds 24, 26 press and sandwich the measurement unit 2 as shown in FIG. 16 (S220: pressing step).

[0022] Here, the numerical values ​​displayed on the display sections 31 and 32 of the display unit 4 are checked and adjusted to approach zero (0.0000) (S230: horizontal alignment process). As shown in FIGS. 16 and 17, the press device 35 is provided with fine adjustment sections 36 and 37 that adjust the tilt slightly in the X and Y directions. The fine adjustment sections 36 and 37 are configured as operating tips with oval cross sections, and by rotating these, the height can be slightly changed. By operating the fine adjustment sections 36 and 37, the numerical values ​​displayed on the display sections 31 and 32 are adjusted to approach zero (0.0000) in the X and Y directions. In practice, the horizontal position of the press operation can be positioned within the allowable range even if both digital displays are not adjusted to zero, as long as they are within a predetermined range (e.g., 0.001 to -0.001). As described above, according to this embodiment, it is possible to provide the level ensuring jig 1 that can digitally check the level of the press device 35, and a level ensuring method using this jig. In this embodiment, the screw member 8 is configured to be tightened with a hexagonal nut, but according to the present invention, a screw member with a cross knob on the edge can be used as the screw member. In this way, the screw can be tightened by hand without using a tool, so the zero point memorization process can be carried out quickly. [Explanation of symbols]

[0023] 1...Leveling jig, 2...Measuring unit, 3...Zero setting master unit, 4...Display unit, 15...Upper flat plate member, 16...Lower flat plate member, 17...Fixing screw (locking member), 24...Upper die, 26...Lower die, 29...Disc spring (elastic member), 35...Pressing device, 36, 37...Fine adjustment unit

Claims

1. In a press machine, a jig for ensuring horizontality between an upper mold and a lower mold of a press die includes a measurement unit capable of converting horizontality in the X and Y directions into electrical signals and measuring them, a zero regulation master unit that clamps the measurement unit to regulate a predetermined reference zero point, and a display unit that digitally displays the electrical signals output from the measurement unit, The jig for ensuring levelness of a press machine is characterized in that the display unit is provided with a zero point memory section that stores the position when the reference zero point is reached.

2. 2. The jig for ensuring levelness of a press machine according to claim 1, wherein the measurement unit is provided with a pair of flat plate-like members, and between the two flat plate-like members are provided an elastic member that presses the two flat plate-like members in a direction separating them from each other, and a locking member that keeps the two flat plate-like members separated at an initial position at a distance greater than the reference zero point.

3. A method for ensuring horizontality between an upper mold and a lower mold of a press mold using the horizontality ensuring jig according to claim 1 or 2, comprising: (A) a zero point storage step for storing a reference zero point in the zero point storage section of the display unit; (B) a measurement unit placement step for placing the measurement unit on the upper surface of the lower mold; (C) a pressing step for lowering the upper mold to a certain position and pressing the measurement unit; and (D) a leveling step for adjusting the level in the XY directions until it is within a predetermined range by operating a fine adjustment section of the press device.

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