Patents Assigned to Dae Won Kang Up Co., Ltd.
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Patent number: 9744584Abstract: The present invention relates to a hot coiling machine, and an object of the invention is to provide a hot coiling machine that produces coil springs having various coil shapes and diameters from a heated wire without a mandrel. The present invention provides a hot coiling machine including: a center roll rotating by a drive unit; a feeding roll disposed near the center roll and facing an external surface of the center roll, the center roll being configured to move by a first positioning unit and being rotated by a drive unit thus moving a wire together with the center roll; a forming roll for forming the wire into a coil shape; and a pitch control unit disposed near the forming roll to come into contact with the coiled wire and pushing the coiled wire to provide the coiled wire with a desired pitch.Type: GrantFiled: March 27, 2014Date of Patent: August 29, 2017Assignee: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi Jung, Ui-Seuk Yoon
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Patent number: 9718162Abstract: Disclosed herein is an apparatus for grinding a compression line spring. The apparatus includes a lower chain conveyor (100), an upper chain conveyor (200), and grinding units (300). The lower chain conveyor includes chain units each having first support blocks (115) for supporting compression line springs. The upper chain conveyor includes chain units each having second support blocks (215) for compressing downward upper portions of the compression line springs and thus supporting the compression line springs. The grinding units grind seat surfaces formed on opposite ends of the compression line springs that are moved by the upper and lower chain conveyors. A V-shaped depression (115a) is formed in each first support block so that each of the compression line springs is seated onto the corresponding V-shaped depression. A lower surface (215a) of the second support block that compresses the compression line springs has a planar structure.Type: GrantFiled: April 17, 2013Date of Patent: August 1, 2017Assignee: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi Jung, Ui-Seuk Yoon
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Patent number: 9694463Abstract: Disclosed herein is an apparatus for grinding a compression line spring. The apparatus includes a lower chain conveyor (100), an upper chain conveyor (200), and grinding units (300). The lower chain conveyor includes chain units (110) and (110?) provided facing each other at positions spaced apart from each other. Each chain unit (110), (110?) includes first V-shaped blocks (115) for supporting compression line springs. The upper chain conveyor includes chain units (210) and (210?) provided facing each other at positions spaced apart from each other. Each chain unit (210), (210?) includes second V-shaped blocks (215) for compressing downward upper portions of the compression line springs seated on the first V-shaped blocks (115) and thus supporting the compression line springs. The grinding units (300) grind seat surfaces formed on opposite ends of the compression line springs that are being moved by the lower chain conveyor and the upper chain conveyor.Type: GrantFiled: December 7, 2012Date of Patent: July 4, 2017Assignee: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi Jung, Ui-Seuk Yoon
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Publication number: 20150298277Abstract: Disclosed herein is an apparatus for grinding a compression line spring. The apparatus includes a lower chain conveyor (100), an upper chain conveyor (200), and grinding units (300). The lower chain conveyor includes chain units (110) and (110?) provided facing each other at positions spaced apart from each other. Each chain unit (110), (110?) includes first V-shaped blocks (115) for supporting compression line springs. The upper chain conveyor includes chain units (210) and (210?) provided facing each other at positions spaced apart from each other. Each chain unit (210), (210?) includes second V-shaped blocks (215) for compressing downward upper portions of the compression line springs seated on the first V-shaped blocks (115) and thus supporting the compression line springs. The grinding units (300) grind seat surfaces formed on opposite ends of the compression line springs that are being moved by the lower chain conveyor and the upper chain conveyor.Type: ApplicationFiled: December 7, 2012Publication date: October 22, 2015Applicant: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi JUNG, Ui-Seuk YOON
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Publication number: 20150273565Abstract: The present invention relates to a hot coiling machine, and an object of the invention is to provide a hot coiling machine that produces coil springs having various coil shapes and diameters from a heated wire without a mandrel. The present invention provides a hot coiling machine including: a center roll rotating by a drive unit; a feeding roll disposed near the center roll and facing an external surface of the center roll, the center roll being configured to move by a first positioning unit and being rotated by a drive unit thus moving a wire together with the center roll; a forming roll for forming the wire into a coil shape; and a pitch control unit disposed near the forming roll to come into contact with the coiled wire and pushing the coiled wire to provide the coiled wire with a desired pitch.Type: ApplicationFiled: March 27, 2014Publication date: October 1, 2015Applicant: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi Jung, Ui-Seuk Yoon
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Patent number: 8539675Abstract: A method for manufacturing a stabilizer bar for a vehicle includes cutting a stabilizer bar material having a round bar-shaped configuration, heating both end portions of the cut stabilizer bar material to be formed as leg bars of the stabilizer bar, rolling both side surfaces of each of both heated end portions of the stabilizer bar material so that both side surfaces are tapered, rotating the stabilizer bar material about an axis thereof between rollers to taper both remaining non-rolled side surfaces of each of both end portions of the stabilizer bar material to be formed as the leg bars of the stabilizer bar, so that each or both end portions of the stabilizer bar material has an elliptical cross-section, forming eyes on distal ends of the stabilizer bar material, and bending the stabilizer bar material into the shape of the stabilizer bar.Type: GrantFiled: February 8, 2011Date of Patent: September 24, 2013Assignee: Dae Won Kang Up Co., Ltd.Inventor: Chan-Gi Jung
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Patent number: 8438733Abstract: A method of manufacturing a coil spring using a helicoid reduction mill includes supplying a coil spring material linearly unrolled by a prestraightener to a surface treatment machine and then short-blasting or scarfing its outer surface to surface-treat the coil spring material; primarily heating the surface-treated coil spring material to a predetermined temperature using a first heater; sequentially supplying and pressurizing the primarily-heated coil spring material in a stepwise fashion such that the coil spring material has the same diameter as that of a coil spring to be manufactured; measuring the diameter and the length of the coil spring material and then cutting the coil spring material to a desired size; secondarily heating the cut coil spring material to a predetermined temperature using a second heater; forming the secondarily heated coil spring material into a coil spring using a coiling machine; and oil-quenching and then tempering the formed coil spring.Type: GrantFiled: June 4, 2009Date of Patent: May 14, 2013Assignee: Dae Won Kang Up Co., Ltd.Inventor: Chan-Gi Jung
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Patent number: 8424352Abstract: An apparatus and method for manufacturing a barrel coil spring make it possible to coil opposite sides of a spring material at the same time so as to considerably reduce manufacturing processing, thereby remarkably reducing the time required to manufacture the coil barrel spring, thus improving productivity.Type: GrantFiled: March 18, 2008Date of Patent: April 23, 2013Assignee: Dae Won Kang Up Co., Ltd.Inventors: Chan-Gi Jung, Soon-Sam Hong
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Patent number: 8328603Abstract: An apparatus for stress shot peening of a coil spring is disclosed. The apparatus of the present invention is constructed such that coil springs, which are compressed and clamped by corresponding spring clamping units (20) facing each other, are rotated on their own axes and are simultaneously supplied into the shot room (10) for shot peening. Therefore, the present invention can markedly enhance the internal stress of the coil spring, compared to a coil spring treated by the conventional shot peening apparatus. Furthermore, in the present invention, because the coil springs are clamped by the corresponding spring clamping units facing each other and are simultaneously rotated and moved into the shot room for shot peening, various kinds of side load coil springs, as well as a typical cylindrical coil spring, can be evenly treated throughout the entire surface thereof by shot peening.Type: GrantFiled: July 10, 2008Date of Patent: December 11, 2012Assignee: Dae Won Kang Up Co., Ltd.Inventors: Chan-Gi Jung, Ui-Seok Yoon
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Publication number: 20120047741Abstract: The present invention relates to a method of manufacturing a coil spring using a helicoid reduction mill, which can greatly decrease the weight of a coil spring at the time of manufacturing a coil spring requiring uniform strength, which can manufacture a coil spring in an environment-friendly manner, and which can manufacture spring coils having various material diameters using one coil spring material.Type: ApplicationFiled: June 4, 2009Publication date: March 1, 2012Applicant: DAE WON KANG UP CO., LTD.Inventor: Chan-Gi Jung
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Patent number: 7984918Abstract: A stabilizer bar includes a parallel bar which is secured with respect to a frame via fasteners in each of which a bush is fitted, and leg bars which extend from both ends of the parallel bar with distal ends of the leg bars connected to suspension arms. Each leg bar is tapered from an upper end toward a lower end thereof to continuously decrease a section modulus of the leg bar from the upper end toward the lower end thereof so that the stress generated by a load applied to the lower end of the leg bar is not concentrated on a bent part of the stabilizer bar and is distributed over the entire leg bar so as to prevent the stabilizer bar from being broken at the bent part.Type: GrantFiled: June 16, 2006Date of Patent: July 26, 2011Assignee: Dae Won Kang Up Co., Ltd.Inventor: Chan-Gi Jung
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Publication number: 20110119920Abstract: A method for manufacturing a stabilizer bar for a vehicle includes cutting a stabilizer bar material having a round bar-shaped configuration, heating both end portions of the cut stabilizer bar material to be formed as leg bars of the stabilizer bar, rolling both side surfaces of each of both heated end portions of the stabilizer bar material so that both side surfaces are tapered, rotating the stabilizer bar material about an axis thereof between rollers to taper both remaining non-rolled side surfaces of each of both end portions of the stabilizer bar material to be formed as the leg bars of the stabilizer bar, so that each or both end portions of the stabilizer bar material has an elliptical cross-section, forming eyes on distal ends of the stabilizer bar material, and bending the stabilizer bar material into the shape of the stabilizer bar.Type: ApplicationFiled: February 8, 2011Publication date: May 26, 2011Applicant: DAE WON KANG UP CO., LTD.Inventor: Chan-Gi JUNG
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Publication number: 20110053471Abstract: An apparatus for stress shot peening of a coil spring is disclosed. The apparatus of the present invention is constructed such that coil springs, which are compressed and clamped by corresponding spring clamping units (20) facing each other, are rotated on their own axes and are simultaneously supplied into the shot room (10) for shot peening. Therefore, the present invention can markedly enhance the internal stress of the coil spring, compared to a coil spring treated by the conventional shot peening apparatus. Furthermore, in the present invention, because the coil springs are clamped by the corresponding spring clamping units facing each other and are simultaneously rotated and moved into the shot room for shot peening, various kinds of side load coil springs, as well as a typical cylindrical coil spring, can be evenly treated throughout the entire surface thereof by shot peening.Type: ApplicationFiled: July 10, 2008Publication date: March 3, 2011Applicant: DAE WON KANG UP CO., LTD.Inventors: Chan-Gi Jung, Ui-Seok Yoon
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Publication number: 20100243098Abstract: An apparatus and method for manufacturing a barrel coil spring make it possible to coil opposite sides of a spring material at the same time so as to considerably reduce manufacturing processing, thereby remarkably reducing the time required to manufacture the coil barrel spring, thus improving productivity.Type: ApplicationFiled: March 18, 2008Publication date: September 30, 2010Applicant: Dae Won Kang Up Co., Ltd.Inventors: Chan-Gi Jung, Soon-Sam Hong
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Publication number: 20100225083Abstract: A stabilizer bar includes a parallel bar which is secured with respect to a frame via fasteners in each of which a bush is fitted, and leg bars which extend from both ends of the parallel bar with distal ends of the leg bars connected to suspension arms. Each leg bar is tapered from an upper end toward a lower end thereof to continuously decrease a section modulus of the leg bar from the upper end toward the lower end thereof so that the stress generated by a load applied to the lower end of the leg bar is not concentrated on a bent part of the stabilizer bar and is distributed over the entire leg bar so as to prevent the stabilizer bar from being broken at the bent part.Type: ApplicationFiled: June 16, 2006Publication date: September 9, 2010Applicant: DAE WON KANG UP CO., LTD.Inventor: Chan-Gi Jung