JP3130956U - Cast wheel mold for vehicle - Google Patents

Abstract

The present invention provides a casting wheel mold for a vehicle that can minimize a processing burr generated after turning to a shape that does not hinder the appearance and handling safety, and can eliminate a deburring process.
A gradient of 30 ° at an arbitrary height is formed at an end portion of an outer peripheral wall portion of both of an upper die and a lower die or a die for forming a spoke portion 3 extending radially from a disc portion to a rim portion. A turning portion 7 of ± 15 ° is provided, and the turning portion has the same gradient at the joint portion between the disc joint portion and the rim joint portion.
[Selection] Figure 7

Description

  The present invention relates to a mold for use in a casting wheel for a vehicle such as a low pressure casting method or a die casting method.

  Cast wheels for vehicles such as aluminum improve the product strength by filling the metal mold with a finishing allowance to the wheel and filling it with molten metal, then removing burrs generated on the gate and the split surface of the mold. Therefore, heat treatment is performed. Thereafter, the distortion caused by the heat treatment is corrected and finishing such as machining and painting is performed, and then a pressure test is performed and a product having a predetermined strength is packaged and shipped.

  The cast wheels for vehicles are generally turned from the viewpoint of uniform product balance and appearance. In the turning process, a processing burr that is difficult to remove with a lathe is generated on the radial turning end surface from the disk portion on the front and back surfaces of the spoke portion to the rim portion or the upper end surface of the concave detail portion.

  The processing burr not only impairs the aesthetics of the product and hinders sales, but also causes a wound when touched with bare hands, so it must be removed by a deburring process from the viewpoint of safety. On the other hand, since various types of cast wheels for vehicles are produced, it is difficult to introduce an automated line using a deburring machine. Therefore, since the deburring is manually removed using a file or a deburring tool, there is a problem that the manufacturing cost is increased.

  The present invention has been made in view of the above circumstances, and an object thereof is to minimize a processing burr generated when turning a cast wheel for a vehicle and to omit a deburring process.

    In order to achieve the above object, the upper and lower molds that form a radially extending spoke part from the disk part to the rim part, or the end part of the outer peripheral wall part of one mold, are inclined at an arbitrary height. A turning part of 30 ° ± 15 ° is provided, and the turning part is a cast wheel mold for a vehicle in which the turning part has the same gradient at the joint part between the disk joint part and the rim joint part.

  The cast wheel mold for vehicles according to claim 1, wherein a turning part having a 30 ° ± 15 ° gradient at an arbitrary height is attached to a tip part of a mold for forming the concave wall surface part of the detail part.

  Deburring because the processing burr generated on the end face after processing of the spoke part and detail part of the present invention with a 30 ° ± 15 ° turning part is minimized to a shape that does not cause a wound and is not visually confirmed. Manufacturing costs were reduced by omitting the process.

Hereinafter, an embodiment of the present invention performed under the following conditions will be described with reference to the drawings.
Wheel material and heat treatment conditions: AC4C-H T6, hardness:> 65-95
Turning condition: number of revolutions) 1000 r. p. m Chip load) 0.1mm / rev

  1 to 5 show an embodiment of a wheel formed by a conventional mold, and FIG. 1 is a plan view of the wheel W before turning. On the outer peripheral wall surface 3a of the spoke part 3 that extends radially from the disk joint part 1a in the vicinity of the disk part 1 to the rim joint part 2a in the vicinity of the rim part 2, there are two die split surfaces 4 and a draft surface 5 for turning a part thereof. Indicated by a line of books. Further, a concave detail portion 6 is provided on the back surface of the spoke portion 3.

  FIG. 2 is an enlarged view of the cross section AA of the spoke part 3 before the turning process shown in FIG. The outer peripheral wall surface 3 a of the spoke portion 3 is provided with a draft angle surface 5 of approximately 10 ° from the upper and lower mold split surfaces 4 at the center, and the tip of the draft angle surface 5 is A′-A. A draft turning surface 5a with 'as a machining reference is shown.

  FIG. 3 is an enlarged view of the cross section AA of the spoke part 3 after the turning process shown in FIG. A sharp machining burr B1 having a length of several millimeters is generated on one side of the end surface A'-A 'of the draft turning portion 5a.

  FIG. 4 is an enlarged view of the cross section BB of the detail portion 6 before turning shown in FIG. The detail portion 6 is a concave rectangular shape of several centimeters, and the serial number is recorded on the bottom surface. The concave wall surface 6a has a draft angle of approximately 10 °, and B ′ is formed above the concave wall surface 6a. A concave wall turning surface 6b with -B 'as a processing reference is shown.

  FIG. 5 is an enlarged view of the cross section BB of the detail portion 6 after the turning process shown in FIG. A sharp processing burr B2 is generated on one end surface of the processing reference surface B′-B ′ of the concave wall cutting surface 6b of the detail portion 6.

  6 to 10 show an embodiment of a wheel formed by the mold of the present invention, and FIG. 6 is a plan view of the wheel W before turning. The outer peripheral wall surface 3a of the spoke part 3 extending radially from the disk joint part 1a in the vicinity of the disk part 1 to the rim joint part 2a in the vicinity of the rim part 2 is composed of a mold split surface 4, a draft surface 5 and a turning part 7 according to the present invention. The end face of is indicated by three lines. Further, a detail portion 6 is provided on the back surface of the spoke portion 3.

  FIG. 7 is an enlarged cross-sectional view CC of the spoke part 3 before turning shown in FIG. As shown in FIG. 2, the outer peripheral wall surface 3a of the spoke portion 3 is provided with a draft surface 5 of approximately 10 ° from the substantially central mold split surface 4, and 30 ° ± 15 ° at the top and bottom tips of the draft surface 5. The turning part 7 is attached. C′-C ′ is a machining reference line indicating the turning part turning surface 7a.

  FIG. 8 is an enlarged cross-sectional view of the spoke part 3 shown in FIG. As shown in the figure, according to the present invention, the turning part 7 is provided at the tip of the draft surface 5, so that a machining burr having a shape that hinders the appearance and handling occurs on the C′-C7 end face of the turning part turning surface 7a. do not do.

  FIG. 9 is a cross-sectional DD enlarged view of the detail portion 6 before turning. The detail portion 6 is provided with a concave wall turning portion 6a of 30 ° ± 15 ° at the tip of the draft angle surface 5 of about 10 ° as in the case of the spoke portion 3. D'-D 'is a machining reference surface that indicates the concave wall turning part turning surface 6d.

  FIG. 10 is an enlarged sectional view DD of the detail portion 6 shown in FIG. 9 after turning. As shown in the drawing, a processing burr having a shape that must be removed does not occur on the D′-D ′ end face of the concave wall turning part turning surface 6b of the concave wall turning part 6a.

  The present invention can be applied to a die casting product with turning.

  Wheel plan before turning with conventional mold   Cross section AA enlarged view of spoke part before turning with conventional mold   Cross section AA enlarged view of the spoke part after turning with a conventional mold   Section BB enlarged view of detail part before cutting with conventional mold   Cross section BB enlarged view of detail after cutting with conventional mold   Wheel plan before turning with the mold of the present invention   Cross section CC enlarged view of the spoke part before turning with the mold of the present invention   Cross section CC enlarged view of the spoke part after turning with the mold of the present invention   Cross section DD enlarged view of detail part before cutting with mold of the present invention   Cross section DD enlarged view of detail after cutting with mold of the present invention

Explanation of symbols

W Wheel 1 Disc part 1a Disc joint part 2 Rim part 2a Rim joint part 3 Spoke part 3a Spoke outer peripheral wall surface 4 Mold split surface 5 Draft slope surface 5a Draft slope turning surface 6 Detail part 6a Concave wall surface 6b Concave wall turning surface 6c Concave Wall turning part 6d concave wall turning part turning surface 7 turning part 7a turning part turning surface

Claims (2)

  Turning at an arbitrary height with a gradient of 30 ° ± 15 ° at the end of the outer mold wall surface of both the upper and lower molds or one mold that forms a spoke part extending radially from the disk part to the rim part In addition to the above-mentioned parts, the turning part is a cast wheel mold for a vehicle having the same gradient at the connection part between the disk joint part and the rim joint part.   The cast wheel mold for vehicles according to claim 1, wherein a turning part having a 30 ° ± 15 ° gradient at an arbitrary height is attached to a tip part of a mold for forming the concave wall surface part of the detail part.

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