JP5555504B2 - Method for manufacturing article having boss - Google Patents

Description

The present invention relates to a method for manufacturing an article having a boss portion.

  Conventionally, in order to form a plate-shaped member having a boss portion, various types of burring and tapping are performed on the plate-shaped member (see, for example, Patent Document 1). More specifically, after a burring process is performed on the plate-shaped member to form a flange portion, a tapping process is performed on the inner periphery of the flange portion to form a screw hole.

  As described above, when the flange portion is formed by burring, there are certain limitations as follows. That is, if it is going to lengthen the protrusion dimension of a flange part, a forced deformation | transformation will be forced to a plate-shaped member, and a crack etc. might enter into a plate-shaped member. For this reason, there is a problem that it is difficult to increase the distance between the plate-like member provided with the boss portion and another member attached via the boss portion by a certain amount or more.

JP 2005-324273 A

  The present invention is for solving the above-described problems, and an object of the present invention is to provide a method for manufacturing an article having a boss portion that can increase the height dimension without forcibly deforming a plate-like member. And

  The present invention employs the following configuration in order to solve the above-described problems. That is, the method for manufacturing an article provided with a boss portion according to the present invention is a method for manufacturing an article integrally provided with a boss portion, and forms an annular thin portion by crushing a sheet metal material. At the same time, a thickened part is created inside the thinned part, and the thickened part is subjected to burring to form a cylindrical part, and the plastic deformation of the thickened part existing between the cylindrical part and the thinned part A cup-shaped projection is provided by drawing up using a screw, and a screw groove is formed on the inner periphery of the cylindrical portion to form a screw hole.

  In such a case, a plate-like member is used to squeeze the outside of the cylindrical portion using the presence of the thickened portion after forming a cylindrical portion of a normal length by performing burring processing. Therefore, the height dimension of the entire boss part can be made larger than the projecting dimension of the cylindrical part.

  When the article is composed of a single member, it is preferable that the boss portion is formed integrally with the member. The single member in this case is a member that can be recognized as one object in appearance, and may be any member that can be plastically deformed. Not only the material formed into a fixed shape, but also a metal material such as clad or plating laminated or mixed to be formed into a fixed shape, or a metal material and a non-metal material The thing etc. which are mixed and shape | molded by the fixed shape are contained.

  On the other hand, when the article is composed of a plurality of members, it is preferable that the boss part is formed integrally with at least a part of the member. The plurality of members in this case is a member that can be recognized as a plurality of objects in appearance, and at least a member in which the boss portion is formed may be any member that can be plastically deformed. About the member in which a boss | hub part is not formed, the thing made from all materials is included regardless of whether plastic deformation is possible.

  An article produced by such a manufacturing method is formed by integrally forming a boss part on a part of a member, and the boss part bulges to one side by drawing up a part of the member. And a cylindrical portion formed by projecting a part of the tip wall of the projection to the inner side of the projection by burring and engraving a thread groove on the inner periphery, The protrusion dimension is set to be smaller than the bulge dimension of the protrusion.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the articles | goods provided with the boss | hub part which can enlarge a height dimension, without forcedly deforming a plate-shaped member can be provided.

The perspective view of the article | item which is 1st embodiment of this invention. FIG. 2 is a schematic cross-sectional view taken along line AA in which a part of FIG. 1 is omitted. The exploded perspective view of the embodiment. Sectional drawing which shows the manufacturing process of the articles | goods in the embodiment. Sectional drawing which shows the manufacturing process of the articles | goods in the embodiment. The partial expansion perspective view which cut | disconnected some V in FIG. Sectional drawing which shows the manufacturing process of the boss | hub part in the embodiment. Sectional drawing which shows the manufacturing process of the boss | hub part in the embodiment. Sectional drawing which shows the manufacturing process of the boss | hub part in the embodiment. Sectional drawing which shows the manufacturing process of the boss | hub part in the embodiment. The perspective view which shows the manufacturing process of the boss | hub part in the embodiment. The partial expanded sectional view of VI in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  This embodiment is a case where the present invention is applied to a top panel J for forming a keyboard of a notebook personal computer which is a component for a casing of an electronic device. It is drawn to face.

  The upper surface board J is formed by a plurality of plate-like members each having a different shape made by single-piece pressing, that is, the front-side plate-like member 1a exposed to the outside, and the back side of the front-side plate-like member 1a. The intermediate plate-like member 1b to be attached and the back-side plate-like member 1c to be attached to the back side of the intermediate plate-like member 1b are joined together via an adhesive layer s. . Each of the plate members 1a, 1b, 1c is made of metal, and specifically, iron, aluminum, copper, stainless steel, titanium, magnesium, or the like is used.

  The upper surface board J has a plurality of boss portions p1 which are locally unique shaped portions and a thick portion p2 for constituting a region r1 for keyboard formation. Thus, the upper surface board J includes a keyboard forming region r1 and a frame plate forming region r2 surrounding the region r1. The adhesive layer s is present at a substantially constant thickness without being interrupted over the entire joining surface of the plate-like member 1.

  The boss part p1 is a part for mounting and is formed by an intermediate plate-like member 1b, and protrudes inward of the housing in a state where the intermediate plate-like member 1b is bonded to the front-side plate-like member 1a. It has a form to do. In other words, the upper surface board J, which is an article formed by integrally forming the boss portion p1 on the intermediate plate member 1b that is a part of the plate member constituting the upper surface board J, has the boss portion p1 in the middle. A projection p11 formed by bulging the plate-like member 1b on one side by drawing up, that is, the back side of the upper surface board J, and a part of the tip wall p14 of the projection p11 on the inside of the projection p11 by burring. And a projecting dimension s1 of the cylindrical part u3 is set to be smaller than the bulging dimension s2 of the projection p11. At the same time, the inner diameter dimension of the cylindrical portion u3 is set smaller than the inner diameter dimension of the protrusion p11. The boss part p1 is mainly composed of a boss part forming projection p11 formed integrally with the plate-like member 1b when the intermediate plate-like member 1b is manufactured by single-piece press working. The projection p11 The threaded hole p13 is formed by tapping the threaded hole p12 at the tip of the sheet, and the intermediate plate member 1b is bonded to the front plate member 1a. The protrusion p11 has a cavity p111 inside, and this cavity p111 is closed by the plate member 1a on the front side. In other words, the upper surface board J has a portion hollowed by the boss part p1. That is, a top board J for forming a keyboard of a notebook personal computer as an article is composed of a plurality of plate-like members 1a, 1b, 1c, and the boss portion p1 is a part of the plate-like members 1a, 1b, 1c. That is, it is formed integrally with the intermediate plate-like member 1b.

  The thick part p2 is a part mainly for changing the strength, and is formed by superposing and bonding the intermediate plate member 1b and the plate member 1c on the back side to the back surface of the plate member 1a on the front side. It has been. The plate member 1c on the back side has a shape corresponding to the keyboard formation region r1, and the intermediate plate member 1b has a shape that combines the keyboard formation region r1 and the frame plate formation region r2. There is no. For this reason, the keyboard forming region r1 is composed of three plate-like members 1a, 1b, and 1c on the front side, the middle, and the back side, while the region for forming the frame plate is the two plate-like members 1a on the front side and the middle. 1b. As a result, the keyboard forming region r1 is larger in thickness than the frame plate forming region r2 by the thickness of the plate member 1c on the back side. Therefore, the upper surface board J includes a plurality of regions in which the number of the stacked plate-like members is different from each other and the thickness is different.

  In other words, the back-side plate-like member 1c forms a plurality of regions having different numbers of stacked sheets and different thicknesses on the upper surface board J, and changes the strength characteristics of the upper surface board J. Contains at least the element. The plate member 1a on the front side constitutes a part of the outer surface of the housing and includes at least an element that forms a design surface for adjusting the appearance.

  A plurality of key receiving holes 11 for receiving keys (not shown) are formed in the keyboard forming region r1. The frame plate forming region r2 is formed with a track pad and a click button display window 12 (not shown), a switch button display hole 13, and a notch 14 corresponding to the hinge. Each boss part p1 is provided in this region r2.

  Next, a method for manufacturing the upper surface board J will be described.

  As shown in FIGS. 4 and 5, the upper surface board J includes an intermediate plate-like member 1b and a back-side plate which are separately processed into a different shape from a metal front-like plate-like member 1a made by single-piece pressing. The plate-like members 1c are overlapped, and the plate-like members 1a, 1b, and 1c are joined together with an adhesive press process by a press machine equipped with a stroke control mechanism. In the process, the boss part p1 and the thick part p2 which are local unique shape parts as described above are formed simultaneously. Here, the “adhesion press processing” is a term named meaning the entire processing for compressing in the thickness direction in order to bond the plurality of stacked plate-like members 1a, 1b, 1c. Further, “single product pressing” means an act of forming the respective plate-like members 1a, 1b, 1c having a predetermined shape by pressing the sheet metal material U. For convenience of explanation, It is a word that is named to clearly distinguish it from “press processing”.

  The adhesive press working is a process that causes at least the adhesion function of the adhesive layer s interposed between the plate-like members 1a, 1b, and 1c. In the present embodiment, the pressure-pressing force is applied between the plate-like members while applying a pressing force. This is performed by melting the adhered adhesive layer s by heat.

  More specifically, the plate member 1a on the front side having the adhesive layer s on the back surface, the intermediate plate member 1b having no adhesive layer, and the plate on the back side having the adhesive layer s on the surface by single-piece pressing. Each member 1c is manufactured. Thereafter, the plate-like members 1a, 1b, and 1c are overlapped with each other and then subjected to an adhesive press process at such a temperature that the adhesive layer s is melted. Join. Next, the peripheral portion 15 of the front plate member 1a is hemmed to finish the contour portion of the top panel J, and the key receiving hole 11, the track pad and the click button display window 12, the switch button A sticking shaving process, which is a finishing press process, is performed on the hole 13 for exposure, the notch 14 corresponding to the hinge, and the like. The sticking shaving process is for cutting off the unnecessary portion st after finishing the adhesive press process. The unnecessary portion st is a portion that protrudes from a portion that should constitute the edge of the finished product. In this embodiment, for example, as shown in FIG. 12, it means a portion st that protrudes from the inner peripheral edge of the key receiving hole. ing. The protruding portion st includes the metal portion st1 of the plate-like member, the portion st2 of the adhesive layer, or both.

  Specifically, the inner diameter dimension m2 of the hole 11 ′ corresponding to the key accommodation hole 11 of each plate-like member 1 formed by single-piece pressing is larger than the inner diameter dimension m1 of the key accommodation hole 11 of the upper surface board J which is a finished product. If it is slightly smaller, not only the part st2 of the adhesive layer but also the metal part st1 is punched out by this pasting shaving process. At that time, the clearance between the upper die and the lower die of the press machine is set to a state close to zero and then punched while cooling, so that the inner periphery of the key receiving hole 11 is in a mirror finish state and the processed surface is brought to the appearance level of the product. Can be molded. This sticking shaving process can be performed on the window 12 and the cutout portion 14 at the same time.

  Single-piece press processing relating to the plate member 1a on the front side is performed using a normal press processing technique involving punching.

  In the single-piece press work related to the intermediate plate-like member 1b, a special press work process for forming the boss part p1 is added in addition to a normal press work technique involving punching. FIG. 6 is an enlarged view of the boss part p1, and a part thereof is cut to show the internal structure. In order to form the boss part p1 by press working, first, the sheet metal material U constituting the intermediate plate-like member 1b as shown in FIG. 7 is crushed as shown in FIG. 8 to form an annular thin part u1. And a thickened portion u2 is created inside the thin-walled portion u1. Thereafter, as shown in FIG. 9, the thickened portion u2 is subjected to burring to form a tubular portion u3, and plastic deformation of the thickened portion u2 existing between the tubular portion u3 and the thin-walled portion u1. A cup-shaped protrusion p11 as shown in FIG. Then, a screw groove p13 is formed by tapping on the inner periphery of the cylindrical portion u3 to form a screw hole p12. By performing the above steps, a boss portion p1 as shown in FIG. 11 can be obtained.

  Single-piece press working on the plate member 1c on the back side is performed using a normal press working technique involving punching.

  As described above, the manufacturing method of the upper surface board J including the boss part p1 according to the present embodiment forms the annular thin part u1 by crushing the sheet metal material U, and the inside of the thin part u1. The thickened portion u2 is formed, and the thickened portion u2 is subjected to burring to form the tubular portion u3, and the plastic deformation of the thickened portion u2 existing between the tubular portion u3 and the thin-walled portion u1 is used. Then, a cup-shaped projection p11 is provided by a drawing process, and a screw groove p13 is formed on the inner periphery of the cylindrical portion u3 to form a screw hole p12. That is, after burring is performed to form a tubular portion u3 having a height that does not cause cracks in the intermediate plate-like member 1b, the outside of the tubular portion u3 is squeezed using the presence of the thickened portion u2. Since the intermediate plate-like member 1b is not subjected to excessive deformation, the overall height of the boss part p1 can be made larger than the protrusion dimension s1 of the cylindrical part u3. That is, after the burring process is performed to form the tubular portion u3, the outside of the tubular portion u3 is drawn up, so that the tubular portion u3 is made thicker than the intermediate plate-like material 1b by this drawing up processing. It will be formed at the displaced position. Therefore, the distance between the intermediate plate-like member 1b provided with the boss portion p1 and the housing attached via the boss portion p1 can be increased without difficulty.

  Further, the sheet metal material U is crushed to create a thickened portion u2, and the thickened portion u2 is squeezed up, so that the sheet metal material U can be squeezed deeply without causing cracks or the like. it can.

  Furthermore, according to the manufacturing method of the upper surface board J according to the present embodiment, compared with the manufacture of the upper surface board made by the low-productivity / high-cost aluminum machining that is currently performed, by the inexpensive press work. Since the tall boss part p1 can be formed, articles of various forms can be manufactured without causing a significant increase in man-hours. That is, by combining the plate-shaped members 1a, 1b, and 1c having complicated shapes, the cost for processing can be greatly reduced as compared with the integrated processing.

  Moreover, according to the manufacturing method of the upper surface board J concerning this embodiment, while maintaining the intensity | strength of the sheet-metal raw material U, while being able to aim at weight reduction and thickness reduction, the conventional aluminum cutting processing of it is possible. More than the case, distortion at the time of processing can be suppressed. Moreover, since the unevenness | corrugation corresponding to the boss | hub part p1 is not formed in the plate-shaped member 1a on the front side, the freedom degree of the design property of a design surface can be raised.

  By pre-coloring a part of the multilayer parts of the top panel J according to the present embodiment, for example, the plate member 1a on the front side, post-processing such as painting in a separate process becomes unnecessary.

  Furthermore, the number of parts can be reduced by integrating the intermediate plate-like member 1b and the boss part p1.

  Needless to say, the present invention is not limited to the embodiments described above.

  In the above-described embodiment, the case where the present invention is applied to the top panel constituting the casing of the notebook personal computer has been described. However, the present invention is not limited to this and can be applied to parts of various products. . For example, the operation unit side top panel and the display unit side top panel that constitute the casing of the mobile phone, the front panel and rear panel that constitute the digital camera casing, the rear panel that constitutes the rectangular cellular phone casing, Front panel and rear panel constituting the casing of the portable game machine, front panel and rear panel constituting the casing of the portable car navigation system, and other articles constituting part of the casing of the electronic device according to the present invention In addition to what has been described above, various examples such as a desktop personal computer, a smartphone, or a personal digital assistant (PDA) can be given. In addition, the article according to the present invention can be applied not only to electronic devices but also to parts of automobiles and aircraft.

  In order to increase the degree of pressing and further contribute to the reduction of man-hours, it is desirable that all the plate-like members are made of metal each made by single-piece pressing. In addition, the metal plate-like member is not only a single metal plate such as a steel plate, aluminum plate, stainless steel plate, titanium plate, duralumin plate, magnesium plate, but also a metal plate as a main component, and on the entire surface and back surface. Those having various coating layers are also included.

  However, if at least one of the plate-like members is made of a non-metal, a component that effectively utilizes the characteristics of the non-metal plate-like member can be obtained. Examples of non-metallic materials include those made of resin, glass, wood, ceramic, mortar, or concrete.

  Specifically, in order to apply to various specifications, at least one of the plurality of plate-like members includes an element for changing strength characteristics, and for changing mass distribution. Including elements, including elements having a shielding function for shielding heat, electricity, electromagnetic waves, sound, light, etc., including elements having a vibration control function, or for adjusting the appearance It is preferable to apply one including elements that form the design surface. Here, “strength characteristics” means general characteristics relating to strength, and specific examples include rigidity, softness, flexibility, toughness, elasticity, torsion, and pressure resistance. "Elements" include those related to form, material, color, electrical characteristics, heat resistance, plastic deformation workability, corrosion resistance, aging change characteristics Related to the above, or a combination of these. In addition, a shape, a pattern, a structure, etc. are contained in a form. For example, in a three-piece structure consisting of a front plate member 1a, an intermediate plate member 1b, and a back plate member 1c, the heat dissipation is improved by using an aluminum material for each plate member 1a, 1b, 1c. Can do. Moreover, heat insulation can be improved by putting a heat insulation sheet between the plate-like members 1a, 1b, 1c using these aluminum materials.

  As described above, it is preferable to select various plate-like members according to the purpose of use and to combine them, and by selecting the material of each multilayer member, it is possible to reduce the weight and increase the rigidity of the article. .

  The shape of the boss portion is not limited to a circle, and may be an ellipse or other different shapes. Further, the number of boss portions is not limited to a plurality, and may be one. Furthermore, the formation position of the tube portion is not limited to the center of the tip wall.

  The thin-walled portion is not limited to being formed in a complete annular shape, and may be formed intermittently.

  The tapping process is performed in a separate process after the formation of the boss part having no thread groove. However, the tapping process may be performed in the same process as forming the cylinder part by burring process.

  In addition, various changes may be made without departing from the spirit of the present invention.

p1 ... Boss part p11 ... Projection p12 ... Screw hole p13 ... Screw groove s1 ... Projection dimension s2 ... Swelling dimension U ... Sheet metal material u1 ... Thin wall part u2 ... Thickening part u3 ... Tube part

Claims (3)

A method for manufacturing an article integrally provided with a boss portion,
The sheet metal material is crushed to form an annular thin part, and a thickened part is created inside the thin part, and the thickened part is subjected to burring to form a cylindrical part. Using a plastic deformation of the thickened portion existing between the thin wall portion and providing a cup-like projection by drawing up, and forming a screw hole on the inner periphery of the cylindrical portion to form a screw hole A method for manufacturing an article having a boss portion as a feature. The manufacturing method of the article | item provided with the boss | hub part of Claim 1 by which the article | item is comprised from the single member and the said boss | hub part is integrally formed in the said member. The method of manufacturing an article having a boss portion according to claim 1, wherein the article is composed of a plurality of members, and the boss portion is formed integrally with at least a part of the member.

Images