WO2017138621A1 - コイルばね製造方法及びコイルばね製造装置 - Google Patents
コイルばね製造方法及びコイルばね製造装置 Download PDFInfo
- Publication number
- WO2017138621A1 WO2017138621A1 PCT/JP2017/004818 JP2017004818W WO2017138621A1 WO 2017138621 A1 WO2017138621 A1 WO 2017138621A1 JP 2017004818 W JP2017004818 W JP 2017004818W WO 2017138621 A1 WO2017138621 A1 WO 2017138621A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil spring
- fluidized bed
- upstream
- powder
- manufacturing
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
- B05C19/02—Apparatus specially adapted for applying particulate materials to surfaces using fluidised-bed techniques
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
- B05C3/10—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles the articles being moved through the liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/06—Wound springs with turns lying in cylindrical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/70—Materials used in suspensions
- B60G2206/72—Steel
- B60G2206/724—Wires, bars or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0208—Alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/02—Surface treatments
Definitions
- Embodiments of the present disclosure relate to a coil spring manufacturing method and a coil spring manufacturing apparatus used in the coil spring manufacturing method.
- Vehicles such as automobiles are constituted by various suspension members including coil springs, and are provided with a suspension mechanism interposed between the vehicle body and the wheels.
- the coil spring of the suspension member is made of spring steel and has a rust-proof coating on the surface.
- the anticorrosive coating film that protects the coil spring is required to have chipping resistance against stones and gravel flying while traveling and corrosion resistance against rainwater and the like. In order to guarantee these functions, the lower limit value of the film thickness is strictly controlled in the anticorrosive coating film.
- the end winding part on the wheel side is supported by the spring seat of the suspension mechanism. Since mud and rainwater may enter between the wheel-side end winding portion and the spring seat, particularly strict film thickness control is required for the anti-rust coating on the wheel-side end winding portion.
- the coil spring Since the coil spring has a spiral shape, if the electrostatic coating method is applied to the coil spring in a posture in which only one end of the end winding portion on the vehicle body side is supported, the outer part of the spiral facing the electrostatic gun and the rest There is a large difference in the amount of the powder coating adhering to this part. For this reason, it has been difficult to form a uniform coating film on the coil spring by powder coating by the electrostatic coating method. Since the lower limit value of the film thickness required for the anticorrosive coating film is determined, if the deviation of the film thickness is large, the cost of the paint is wasted at the site where the coating is thicker than the lower limit value.
- a powder coating method As a powder coating method, besides the electrostatic coating method, there is a fluidized immersion method in which a substrate is immersed in a fluidized bed in which a powder coating material is fluidized.
- the fluid immersion method is affected by the flow of the powder coating that convects the inside of the fluidized bed, there is a large difference in the amount of powder coating adhering between the upper surface and the lower surface of the coil spring.
- the lower surface of the coil spring may be affected by the bubbles and become a skin.
- An object of the present invention is to provide a coil spring manufacturing method and a coil spring manufacturing capable of reducing the total amount of paint used while ensuring the thinnest lower limit value of the coating film by reducing the unevenness of the film thickness of the anticorrosion coating film. Is to provide a device.
- a coil spring of a vehicle suspension member is immersed in a fluidized bed in which a powder coating material is flowed for coating.
- the fluidized bed has an upstream / downstream region in which the powder coating material flows upward or downward.
- the coil spring is immersed in the upstream / downstream region of the fluidized bed with the end portions of the coil spring facing upward and is periodically in a direction including a component perpendicular to the central axis of the coil spring with respect to the upstream / downstream region. Is moved relative to
- the coil spring manufacturing apparatus of the present invention paints the coil spring of the vehicle suspension member.
- the coil spring manufacturing apparatus includes a paint tank, a blower, a relative movement mechanism, and a transport device.
- the paint tank is filled with powder paint.
- the blower forms a fluidized bed by causing the powder coating material to flow.
- the conveying device conveys the coil spring to the paint tank. At this time, the fluidized bed has an upstream / downstream region in which the powder coating material flows upward or downward.
- the conveying device immerses the coil spring in the upstream and downstream regions of the fluidized bed in a posture in which the end portions of the coil spring face upward.
- the relative movement mechanism periodically moves the paint tank relative to the coil spring.
- FIG. 1 is a side view schematically showing a coil spring manufacturing apparatus according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the fluidized bed shown in FIG.
- FIG. 3 is a perspective view showing a powder-coated coil spring.
- FIG. 4 is a cross-sectional view of the coil spring shown in FIG.
- FIG. 5 is a plan view for explaining the movement of the coil spring according to the first embodiment and the second embodiment.
- FIG. 6 is a front view for explaining the movement of the coil spring according to the third embodiment.
- FIG. 7 is a plan view for explaining the movement of the coil spring of Comparative Example 4.
- FIG. FIG. 8 is a plan view for explaining another example of the movement of the coil spring according to the embodiment.
- FIG. 9 is a diagram showing the results of Example 1.
- FIG. 10 is a diagram showing the results of Example 2.
- FIG. 11 is a diagram showing the results of Example 3.
- FIG. 12 is a diagram showing the results of Comparative Example 1.
- FIG. 13 is a diagram showing the results of Comparative Example 2.
- FIG. 14 is a diagram showing the results of Comparative Example 4.
- FIG. 1 is a side view schematically showing a coil spring manufacturing apparatus 1.
- FIG. 2 is a cross-sectional view of the fluidized bed along the line F2 in FIG.
- the coil spring manufacturing apparatus 1 includes a fluidized bed 2, a relative movement mechanism 3, a transfer device 4, a first heating furnace 5, and a second heating furnace 6. .
- the fluidized bed 2 is a powder paint P fluidized by a paint tank 10, a gas dispersion plate 11, and a blower 12.
- the paint tank 10 is formed in a bottomed cylindrical shape and is installed on the relative movement mechanism 3.
- the paint tank 10 includes a disk-shaped bottom wall 13 and a peripheral wall 14 extending upward from the periphery of the bottom wall 13.
- a gas dispersion plate 11 is disposed in the internal space 15 of the paint tank 10.
- the gas dispersion plate 11 is formed as a perforated plate, for example, and is opposed to the bottom wall 13 with a gap.
- the interior space 15 of the paint tank 10 is divided into upper and lower portions by a gas dispersion plate 11.
- a portion of the internal space 15 below the gas dispersion plate 11 is partitioned as a plenum chamber 15A.
- the upper side of the gas dispersion plate 11 is partitioned as a coating booth 15B.
- the coating booth 15B is filled with powder paint P.
- the blower 12 is configured to be able to supply a fluidizing gas such as air to the plenum chamber 15A. After the fluidizing gas supplied from the blower 12 is filled in the plenum chamber 15A, it is uniformly dispersed by the gas dispersion plate 11 and supplied to the coating booth 15B. The fluidizing gas supplied to the painting booth 15B changes the powder coating P filled in the painting booth 15B from the fixed layer to the fluidized bed 2.
- a fluidizing gas such as air
- the upstream / downstream region 8 includes an upward flow region 8A in which the powder coating material P flows from the bottom to the top, and a downward flow region 8B in which the powder coating material P flows from the top to the bottom.
- the upflow region 8 ⁇ / b> A is formed at the center of the fluidized bed 2
- the downflow region 8 ⁇ / b> B is formed at the outer periphery of the fluidized bed 2 near the peripheral wall 14.
- the powder coating material P that has risen in the upward flow region 8A is moving toward the downward flow region 8B.
- the powder coating material P that has descended the downflow region 8B is moving toward the upflow region 8A.
- a region connecting the end point of the upflow region 8A and the start point of the downflow region 8B is a surface layer region 9A, and a region connecting the end point of the downflow region 8B and the start point of the upflow region 8A is a deep layer region 9B.
- the relative movement mechanism 3 is installed on a horizontal plane such as a factory floor.
- the relative movement mechanism 3 is formed in a disk shape, for example, and is connected to a rotation driving device 3A including a motor and a power transmission mechanism.
- the relative movement mechanism 3 is rotationally driven by the rotation driving device 3A, and horizontally rotates the paint tank 10 installed on the upper surface of the relative movement mechanism 3 as indicated by an arrow R1 in FIG.
- the relative movement mechanism 3 according to the present embodiment can also be called a turntable 3.
- the transport device 4 includes a plurality of gripping portions, rails 17, and air blows 18.
- the hanger 16 etc. are mentioned as an example of a holding part.
- the hanger 16 has a base end supported by the rail 17 and a hanging lower end formed in a bowl shape, and a coil spring S is suspended from the hanging lower end.
- FIG. 3 is a perspective view of the coil spring S in a state where it is suspended from the hanger 16.
- the coil spring S is suspended from the hanger 16 in a posture in which the body winding portion E1 on the vehicle body side faces upward, and is in contact with the hanger 16 only by the body winding portion E1 on the vehicle body side. That is, the end winding part E ⁇ b> 2 on the wheel side is not in contact with the hanger 16.
- the coil spring S is formed from a spring steel material.
- the kind of spring steel material is not specifically limited, For example, SAE9254 based on a regulation of the American automobile engineer society is mentioned.
- SUP7 conforming to JIS or other than that may be used.
- a chemical conversion treatment layer may be formed on the surface of the steel material constituting the coil spring S.
- the chemical conversion treatment layer can be formed of a phosphate such as zinc phosphate. Further, in order to improve durability and fatigue fracture resistance by applying surface hardening, surface stress uniformity, and residual compressive stress, the surface of the steel material may be subjected to shot peening treatment.
- the rail 17 is laid above the fluidized bed 2.
- the rail 17 includes an upstream portion 17A extending from the first heating furnace 5 to the fluidized bed 2, a downstream portion 17B extending from the fluidized bed 2 to the second heating furnace 6, an upstream portion 17A, and a downstream portion 17B.
- the powder bath unit 19 includes a downward moving part 19A extending from the upstream part 17A toward the fluidized bed 2, a horizontal moving part 19B facing the upward flow region 8A of the fluidized bed 2, and a horizontal moving part.
- An ascending movement portion 19C extending from 19B toward the downstream portion 17B.
- An air blow 18 for injecting gas toward the fluidized bed 2 is attached to the ascending moving part 19C.
- the hanger 16 When the conveying device 4 is operated, the hanger 16 is guided by the rail 17, and the coil spring S hung on the hanger 16 sequentially passes through the first heating furnace 5, the fluidized bed 2, and the second heating furnace 6. .
- the relative speed between the coil spring S and the fluidized bed 2 transported to the transport device 4 is smaller than the relative speed between the fluidized bed 2 and the coil spring S rotated horizontally by the relative movement mechanism 3.
- the coil spring S suspended from the hanger 16 is guided by the powder bath 19 and immersed in the upward flow region 8A of the fluidized bed 2.
- positioned upstream from the fluidized bed 2 is a draining drying furnace which dries rinse water, when a chemical conversion treatment layer is formed in the steel material of the coil spring S, for example.
- the set temperature of the first heating furnace 5 is preferably higher than the temperature for the purpose of drying only moisture.
- the first heating furnace 5 may be prepared separately from the draining drying furnace.
- the first heating furnace 5 preheats the coil spring S to be immersed in the fluidized bed 2 from now on.
- the surface temperature of the coil spring S heated in the first heating furnace 5 is, for example, 120 to 230 ° C., and preferably 150 to 180 ° C.
- the second heating furnace 6 disposed downstream of the fluidized bed 2 is a baking furnace that heats the coil spring S that is immersed in the fluidized bed 2 and to which the powder coating material P adheres, and is suspended from, for example, a hanger 16.
- a pair of rails 17 are arranged on both sides of the coil 17 so as to sandwich the coil spring S therebetween.
- the heating temperature in the second heating furnace 6 is 120 to 230 ° C., for example.
- the heating time is, for example, 5 to 60 minutes.
- FIG. 4 is a cross-sectional view of the coil spring S coated with powder.
- the powder coated coil spring S has a coating film C formed on the surface of the steel material.
- the coating film C of this embodiment is a single coat and has both chipping resistance and corrosion resistance.
- the powder coating material P that forms such a coating film C is, for example, an epoxy-based coating material that includes a corrosion-resistant component that forms a coating film so as to enclose bubbles. In the coating film C, chipping resistance is ensured by bubbles formed inside the coating film C, and corrosion resistance is secured by the corrosion resistance component of the powder coating P.
- Example 1 A coil spring S having an element wire diameter of 9.0 mm, a free height of 285 mm, a coil diameter of 91 ⁇ 6 mm, and a winding number of 5.8 was prepared.
- the end turn E1 on the vehicle body side of the coil spring S was suspended from a hanger.
- the coil spring S was subjected to chemical conversion treatment with zinc phosphate, and then heated to 120 ° C. in a preheating furnace.
- the fluidized bed 2 was horizontally rotated at 10 rotations / 15 seconds, and the coil spring S was immersed in the upward flow region 8A of the rotating fluidized bed 2 for 15 seconds.
- the coil spring S during immersion was periodically moved relative to the fluidized bed 2 as indicated by an arrow R2 in FIG.
- the coil spring S was pulled up from the fluidized bed 2, and the powder coating P not adhered by preheating was blown by the air blow 18.
- the powder coating P adhered to the coil spring S was baked in a baking furnace to form a coating film C.
- Example 2 The coating film C was applied in the same manner as in Example 1 except that a coil spring S having a wire diameter of 15.4 mm, a free height of 332 mm, a coil diameter of 98 ⁇ 5 mm, and a winding number of 6.2 was prepared as a workpiece. Formed. The measurement results are shown in FIG.
- Example 3 A coating film C was formed in the same manner as in Example 1 except that the coil spring S was immersed in the upstream / downstream region 8 including the downflow region 8B deviating from the upward flow region 8A, not the upward flow region 8A of the fluidized bed 2. .
- the coil spring S during immersion was periodically moved relative to the fluidized bed 2 as indicated by an arrow R3 in FIG. The measurement results are shown in FIG.
- Example 1 Using the same coil spring S and powder coating P as in Example 1, a coating film was formed by an electrostatic coating method instead of a fluid immersion method. The measurement results are shown in FIG.
- a coating film C was formed in the same manner as in Example 1 except that the fluidized bed 2 was not horizontally rotated by the relative movement mechanism 3 and the coil spring S was immersed in the stationary fluidized bed 2. Citron peel could not be measured thickness has encountered the measurement points S 1 to the coating film C surface at the lower surface of the S 15.
- Example 1 according to the fluidized immersion method, as shown in FIG. 9, the minimum value is 320 ⁇ m (the lower surface of S 1 ) and the maximum value is 700 ⁇ m (the upper surface of S 11 ). As shown in FIG. 12, the minimum value was 300 ⁇ m (S 12 upper surface), and the maximum value was 850 ⁇ m (S 7 outer surface).
- Example 2 by the fluid dipping method as shown in FIG. 10, the minimum value is 250 ⁇ m (S 1 lower surface) and the maximum value is 700 ⁇ m (S 4 inner surface), whereas Comparative Example 2 by electrostatic coating method. in, as shown in FIG. 13, the minimum value 180 [mu] m (S 13 inner surface), and a maximum value 1500 .mu.m (S 15 outer surface).
- Example 2 the difference from the electrostatic coating method is clear.
- the electrostatic coating method when the strand diameter is large and the spacing between the strands is narrow as in Comparative Example 2, it is difficult to attach the powder coating to the inner surface of the coil spring.
- Example 2 by the fluidized immersion method there is no such uneven thickness.
- Comparative Example 3 and Comparative Example 4 in which the coil spring S is not periodically moved relative to the fluidized bed 2 in the direction including the component perpendicular to the central axis X will be described, although the fluidized immersion method is used.
- Comparative Example 3 in which the coil spring S was stationary in the fluidized bed 2 the film thickness could not be measured because the surface of the coating film C on the lower surface of the coil spring S was severe.
- Comparative Example 4 in which the coil spring S was moved up and down in the fluidized bed 2 the minimum value was 300 ⁇ m (S 1 inner surface) and the maximum value was 1050 ⁇ m (S 11 upper surface) as shown in FIG.
- Example 3 in which the relative movement is performed in the upstream / downstream region 8 including the region 8B will be described.
- the minimum value was 290 ⁇ m (S 1 lower surface) and the maximum value was 880 ⁇ m (S 15 inner surface).
- the difference in film thickness is smaller than those in Comparative Examples 1 to 4, the difference in film thickness is larger than those in Example 1 and Example 2.
- the fluidized bed 2 is rotated horizontally by the relative movement mechanism 3 in the upstream / downstream region 8.
- the coil spring S is immersed.
- the coil spring S has a component perpendicular to the central axis X of the coil spring S in the upward flow region 8A of the upstream / downstream region 8 as indicated by an arrow R1 in FIG. 5 or an arrow R3 in FIG. It is immersed so as to include a periodic relative movement in the including direction.
- the electrostatic coating method since a large amount of the powder coating material P adheres to the outer surface (spiral outer diameter portion) of the coil spring S facing the electrostatic gun, the outer surface and parts other than the outer surface (upper surface, lower surface, inner surface) And the film thickness is biased.
- the coil spring S is applied by the fluid dipping method, the difference in the amount of the powder coating P applied between the outer surface and the portion other than the outer surface can be reduced, and the film thickness of the coating film C can be reduced.
- the bias can be reduced.
- the powder coating P is convected up and down inside the fluidized bed 2 in which the coil spring S is immersed, so that the immersed coil spring S is powdered in the vertical direction and the internal and external directions.
- the amount of the coating P applied is uneven.
- the powder coating P flows from the bottom to the top, the powder coating P collides with the lower surface of the coil spring S, and the adhesion amount of the lower surface is a portion other than the lower surface. More than the amount of adhesion (upper surface, inner surface, outer surface).
- the coil spring S periodically moves relative to the fluidized bed 2 in a direction including a component perpendicular to the central axis X so as to cross the upward flow of the powder coating P. Includes motion R2. Therefore, the powder coating P collides with the coil spring S from multiple directions. Since the powder coating P uniformly adheres to the coil spring S, the unevenness of the film thickness of the coating film C can be reduced.
- the fluidized gas ejected from the gas dispersion plate 11 may aggregate to generate bubbles.
- the coil spring S is relatively moved in a direction including a component perpendicular to the central axis X so as to shift the bubbles attached to the lower surface of the coil spring S. As a result, even if bubbles are generated, the influence on the coil spring S can be suppressed, and the coating film C excellent in aesthetics can be formed.
- the powder coating P that forms the coating film C having both chipping resistance and corrosion resistance by a single coat is used. Since two or more types of powder coatings are not used to form the coating film C, there is no possibility that the ground powder coating is mixed with the top coating powder coating even if the fluidized dipping method is employed.
- a relative movement mechanism may meander the hanger 16 periodically.
- the large fluidized bed 2 is prepared, and the rail 17 of the conveying device 4 is configured to meander over the fluidized bed 2 in the powder bath portion 19.
- the conveying device 4 including the powder bath portion 19 that periodically meanders is an example of a relative movement mechanism.
- the hanger 16 guided to the meandering powder bath portion 19 can periodically move the coil spring S suspended from the hanging end periodically so as to collide with the powder coating material P from multiple directions.
- a relative movement mechanism may rotate the hanger 16 horizontally.
- the powder bath 19 of the transport device 4 is configured as a stage that can be rotated horizontally and independent from the rail 17.
- the plurality of coil springs S conveyed from the upstream portion 17A of the rail 17 are replaced with the hanger 16 together with the powder bath portion 19, and the powder bath portion 19 is lowered while being horizontally rotated to immerse the coil spring S in the fluidized bed 2.
- the coil spring S to which the powder coating P is attached is replaced with the hanger 16 and the downstream portion 17B of the rail 17.
- the conveyance device 4 including the powder bath portion 19 that can rotate horizontally is an example of a relative movement mechanism. Even in such a configuration, the coil spring S horizontally rotated by the powder bath portion 19 can be periodically relatively moved so as to collide with the powder coating material P from multiple directions.
- SYMBOLS 1 Coil spring manufacturing apparatus, 2 ... Fluidized bed, 3 ... Relative movement mechanism, 4 ... Conveying device, 8 ... Up / downstream area
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
図1は、コイルばね製造装置1を概略的に示す側面図である。図2は、図1中のF2線に沿う流動層の断面図である。図1に示すように、コイルばね製造装置1は、流動層2と、相対移動機構3と、搬送装置4と、第1の加熱炉5と、第2の加熱炉6と、を備えている。
[実施例1]
素線の直径が9.0mm、フリーハイトが285mm、コイル径が91±6mm、巻き数が5.8のコイルばねSを用意した。このコイルばねSの車体側の座巻き部E1をハンガーに吊り下げた。コイルばねSをリン酸亜鉛で化成処理したのち、予熱炉で120℃に加熱した。流動層2を10回転/15秒で水平回転させ、回転中の流動層2の上昇流領域8AにコイルばねSを15秒間浸漬させた。浸漬中のコイルばねSは、流動層2に対して図5に矢印R2で示すように周期的に相対移動された。流動層2からコイルばねSを引き上げ、予熱で付着していない粉体塗料Pをエアブロー18で飛ばした。コイルばねSに付着した粉体塗料Pを焼付炉で焼き付けて塗膜Cを形成した。
ワークとして、素線の直径が15.4mm、フリーハイトが332mm、コイル径が98±5mm、巻き数が6.2のコイルばねSを用意した以外は実施例1と同様にして塗膜Cを形成した。測定結果を図10に示す。
流動層2の上昇流領域8Aではなく上昇流領域8Aから外れた下降流領域8Bを含む上下流領域8にコイルばねSを浸漬させた以外は実施例1と同様にして塗膜Cを形成した。浸漬中のコイルばねSは、流動層2に対して図6に矢印R3で示すように周期的に相対移動された。測定結果を図11に示す。
実施例1と同様のコイルばねS及び粉体塗料Pを用いて、流動浸漬法ではなく静電塗装法で塗膜を形成した。測定結果を図12に示す。
実施例2と同様のコイルばねS及び粉体塗料Pを用いて、流動浸漬法ではなく静電塗装法で塗膜を形成した。測定結果を図13に示す。
流動層2を相対移動機構3により水平回転させず、静止した流動層2にコイルばねSを浸漬した以外は実施例1と同様にして塗膜Cを形成した。測定箇所S1乃至S15の下面で塗膜Cの表面にゆず膚が発生したため膜厚を測定できなかった。
流動層2を相対移動機構3で水平回転させる代わりに、コイルばねSを流動層2の内部で上下動させた以外は実施例1と同様にして塗膜Cを形成した。測定箇所S1の下面のみ塗膜Cにゆず膚が発生したため膜厚を測定できなかった。他の測定結果を図14に示す。
流動浸漬法による実施例1では、図9に示すように、最小値320μm(S1下面)、最大値700μm(S11上面)であるのに対し、静電塗装法による比較例1では、図12に示すように、最小値300μm(S12上面)、最大値850μm(S7外面)であった。
実施例3では、図11に示すように、最小値290μm(S1下面)、最大値880μm(S15内面)であった。比較例1乃至比較例4よりも膜厚の差異が小さいものの、実施例1及び実施例2よりも膜厚の差異が大きい。上昇流領域8Aから外れた領域でコイルばねSを動かした場合、実施例1及び実施例2と比べると均一な塗膜を得ることができなかった。
Claims (6)
- 粉体塗料を流動させた流動層に車両用サスペンション部材のコイルばねを浸漬させて塗装するコイルばね製造方法であって、
前記流動層は、前記粉体塗料が上方向又は下方向へ流動する上下流領域を有し、
前記コイルばねは、該コイルばねの座巻き部が上方を向いた姿勢で前記流動層の前記上下流領域に浸漬されるとともに、該上下流領域に対して前記コイルばねの中心軸に垂直な成分を含む方向に周期的に相対移動される
ことを特徴とするコイルばね製造方法。 - 前記コイルばねは、前記流動層の前記上下流領域の内部において、前記相対移動されることを特徴とする請求項1に記載のコイルばね製造方法。
- 前記相対移動は、前記粉体塗料の流れを横切るような水平回転であることを特徴とする請求項1に記載のコイルばね製造方法。
- 前記上下流領域は、前記粉体塗料が上方向へ流動する上昇流領域であることを特徴とする請求項1に記載のコイルばね製造方法。
- 前記粉体塗料が気泡を内包するように塗膜を形成する耐腐食成分を含んだエポキシ系塗料であることを特徴とする請求項1に記載のコイルばね製造方法。
- 粉体塗料が充填された塗料槽と、
前記粉体塗料を流動させて流動層を形成する送風機と、
前記塗料槽を支持する相対移動機構と、
前記塗料槽へコイルばねを搬送する搬送装置と、
を具備した車両用サスペンション部材のコイルばね製造装置であって、
前記流動層は、前記粉体塗料が上方向又は下方向へ流動する上下流領域を有し、
前記搬送装置は、前記コイルばねを該コイルばねの座巻き部が上方を向いた姿勢で前記流動層の前記上下流領域に浸漬させ、
前記相対移動機構は、前記コイルばねに対して前記塗料槽を周期的に水平移動させる
ことを特徴とするコイルばね製造装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17750342.2T PL3415242T3 (pl) | 2016-02-10 | 2017-02-09 | Sposób i urządzenie do wytwarzania sprężyny zwojowej |
CN201780009617.1A CN108698076B (zh) | 2016-02-10 | 2017-02-09 | 一种制造螺旋弹簧的方法及制造螺旋弹簧的装置 |
EP17750342.2A EP3415242B1 (en) | 2016-02-10 | 2017-02-09 | Method and device for manufacturing coil spring |
JP2017567004A JP6789996B2 (ja) | 2016-02-10 | 2017-02-09 | コイルばね製造方法及びコイルばね製造装置 |
ES17750342T ES2925065T3 (es) | 2016-02-10 | 2017-02-09 | Procedimiento y dispositivo para la fabricación de resortes helicoidales |
MX2018009486A MX2018009486A (es) | 2016-02-10 | 2017-02-09 | Metodo de fabricacion de muelles helicoidales y dispositivo de fabricacion de muelles helicoidales. |
US16/100,053 US11065641B2 (en) | 2016-02-10 | 2018-08-09 | Coil spring manufacturing method and coil spring manufacturing device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016023474 | 2016-02-10 | ||
JP2016-023474 | 2016-02-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/100,053 Continuation US11065641B2 (en) | 2016-02-10 | 2018-08-09 | Coil spring manufacturing method and coil spring manufacturing device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017138621A1 true WO2017138621A1 (ja) | 2017-08-17 |
Family
ID=59563346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/004818 WO2017138621A1 (ja) | 2016-02-10 | 2017-02-09 | コイルばね製造方法及びコイルばね製造装置 |
Country Status (9)
Country | Link |
---|---|
US (1) | US11065641B2 (ja) |
EP (1) | EP3415242B1 (ja) |
JP (1) | JP6789996B2 (ja) |
CN (1) | CN108698076B (ja) |
ES (1) | ES2925065T3 (ja) |
HU (1) | HUE059326T2 (ja) |
MX (1) | MX2018009486A (ja) |
PL (1) | PL3415242T3 (ja) |
WO (1) | WO2017138621A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019172327A1 (ja) * | 2018-03-07 | 2019-09-12 | 中央発條株式会社 | スプリング |
CN109453964A (zh) * | 2018-09-26 | 2019-03-12 | 东莞为勤电子有限公司 | 自动粉末涂装机 |
JP6908319B2 (ja) * | 2019-01-11 | 2021-07-21 | 株式会社クリエイティブコーティングス | ペースト塗布装置 |
CN115090457B (zh) * | 2022-07-29 | 2024-01-05 | 兰州空间技术物理研究所 | 一种平面涡卷弹簧的辅助喷涂装置及润滑处理方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6012111B2 (ja) * | 1981-04-17 | 1985-03-29 | 新日本製鐵株式会社 | 被覆ばねの製造法 |
JPS61111174A (ja) * | 1984-11-02 | 1986-05-29 | Nippon Steel Corp | 被塗装物回動式流動浸漬塗装法 |
JPS61278635A (ja) * | 1985-06-03 | 1986-12-09 | Nippon Petrochem Co Ltd | 合成樹脂被覆ばね |
JPS62294463A (ja) * | 1986-06-12 | 1987-12-21 | Hokkai Koki Kk | 金属材の連続粉体塗装装置 |
JP2007198490A (ja) * | 2006-01-26 | 2007-08-09 | Chuo Spring Co Ltd | 高耐久性ばねおよびその塗装方法 |
JP2007313475A (ja) * | 2006-05-29 | 2007-12-06 | Basf Coatings Japan Ltd | 複層塗膜形成方法およびその塗装物品 |
JP2009125629A (ja) * | 2007-11-20 | 2009-06-11 | Showa Corp | コイルばねの被覆部形成方法 |
JP2011110464A (ja) * | 2009-11-25 | 2011-06-09 | Kansai Electric Power Co Inc:The | 粉体塗装装置および粉体塗装方法 |
JP2011139993A (ja) * | 2010-01-07 | 2011-07-21 | Denso Corp | 粉体樹脂浸漬処理方法および粉体樹脂浸漬処理装置 |
JP2013048997A (ja) * | 2011-08-30 | 2013-03-14 | Aisin Aw Co Ltd | 粉体塗装方法及び粉体塗装装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE635220A (ja) * | 1962-07-24 | |||
US3464384A (en) * | 1967-08-28 | 1969-09-02 | Harvey Miller | Fluidized bed coater |
US3985097A (en) * | 1974-12-31 | 1976-10-12 | Acf Industries, Incorporated | Apparatus for coating workpieces with a plastic material |
JPS6094170A (ja) * | 1983-10-29 | 1985-05-27 | Agency Of Ind Science & Technol | 転動流動による連続コ−テイング法及びその装置 |
US4753423A (en) | 1985-06-03 | 1988-06-28 | Nippon Petrochemicals Co., Ltd | Synthetic resin-coated spring and method for making same |
US6140430A (en) * | 1999-05-07 | 2000-10-31 | Morton International Inc. | Powder coating of non-crystalline and crystalline epoxy resins |
US6740406B2 (en) * | 2000-12-15 | 2004-05-25 | Kimberly-Clark Worldwide, Inc. | Coated activated carbon |
GB0113783D0 (en) * | 2001-06-06 | 2001-07-25 | Int Coatings Ltd | Powder coating process |
US6537610B1 (en) * | 2001-09-17 | 2003-03-25 | Springco Metal Coating, Inc. | Method for providing a dual-layer coating on an automotive suspension product |
JPWO2006068165A1 (ja) * | 2004-12-21 | 2008-06-12 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 流動層装置 |
US20070000131A1 (en) * | 2005-05-04 | 2007-01-04 | Sonion Nederland Bv | Solid coated coil and a method of coating a coil |
JP5591133B2 (ja) | 2011-01-07 | 2014-09-17 | 旭サナック株式会社 | 粉体塗装装置 |
ES2386474B1 (es) | 2011-01-21 | 2013-07-09 | Norel, Sa | Aditivos para alimentación animal. |
-
2017
- 2017-02-09 CN CN201780009617.1A patent/CN108698076B/zh active Active
- 2017-02-09 JP JP2017567004A patent/JP6789996B2/ja active Active
- 2017-02-09 EP EP17750342.2A patent/EP3415242B1/en active Active
- 2017-02-09 ES ES17750342T patent/ES2925065T3/es active Active
- 2017-02-09 MX MX2018009486A patent/MX2018009486A/es unknown
- 2017-02-09 HU HUE17750342A patent/HUE059326T2/hu unknown
- 2017-02-09 WO PCT/JP2017/004818 patent/WO2017138621A1/ja active Application Filing
- 2017-02-09 PL PL17750342.2T patent/PL3415242T3/pl unknown
-
2018
- 2018-08-09 US US16/100,053 patent/US11065641B2/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6012111B2 (ja) * | 1981-04-17 | 1985-03-29 | 新日本製鐵株式会社 | 被覆ばねの製造法 |
JPS61111174A (ja) * | 1984-11-02 | 1986-05-29 | Nippon Steel Corp | 被塗装物回動式流動浸漬塗装法 |
JPS61278635A (ja) * | 1985-06-03 | 1986-12-09 | Nippon Petrochem Co Ltd | 合成樹脂被覆ばね |
JPS62294463A (ja) * | 1986-06-12 | 1987-12-21 | Hokkai Koki Kk | 金属材の連続粉体塗装装置 |
JP2007198490A (ja) * | 2006-01-26 | 2007-08-09 | Chuo Spring Co Ltd | 高耐久性ばねおよびその塗装方法 |
JP2007313475A (ja) * | 2006-05-29 | 2007-12-06 | Basf Coatings Japan Ltd | 複層塗膜形成方法およびその塗装物品 |
JP2009125629A (ja) * | 2007-11-20 | 2009-06-11 | Showa Corp | コイルばねの被覆部形成方法 |
JP2011110464A (ja) * | 2009-11-25 | 2011-06-09 | Kansai Electric Power Co Inc:The | 粉体塗装装置および粉体塗装方法 |
JP2011139993A (ja) * | 2010-01-07 | 2011-07-21 | Denso Corp | 粉体樹脂浸漬処理方法および粉体樹脂浸漬処理装置 |
JP2013048997A (ja) * | 2011-08-30 | 2013-03-14 | Aisin Aw Co Ltd | 粉体塗装方法及び粉体塗装装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3415242A4 * |
Also Published As
Publication number | Publication date |
---|---|
US11065641B2 (en) | 2021-07-20 |
EP3415242B1 (en) | 2022-07-06 |
MX2018009486A (es) | 2018-09-05 |
JP6789996B2 (ja) | 2020-11-25 |
PL3415242T3 (pl) | 2022-11-14 |
EP3415242A1 (en) | 2018-12-19 |
JPWO2017138621A1 (ja) | 2018-11-01 |
EP3415242A4 (en) | 2019-12-04 |
HUE059326T2 (hu) | 2022-11-28 |
CN108698076A (zh) | 2018-10-23 |
US20180361424A1 (en) | 2018-12-20 |
ES2925065T3 (es) | 2022-10-13 |
CN108698076B (zh) | 2021-07-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017138621A1 (ja) | コイルばね製造方法及びコイルばね製造装置 | |
US6537610B1 (en) | Method for providing a dual-layer coating on an automotive suspension product | |
AU675329B2 (en) | Vehicle coating process | |
US20060068094A1 (en) | Production paint shop design | |
US20110274841A1 (en) | Coil spring coating portion forming method and apparatus | |
JP2004533319A (ja) | 静電帯電した流動床を用いる粉末コーティング方法 | |
JP4848810B2 (ja) | 塗装方法及び塗装装置 | |
JP4935086B2 (ja) | 回転霧化式塗装装置を用いた塗装方法 | |
JP6292315B2 (ja) | 塗装乾燥装置及び塗装乾燥方法 | |
JP2013000708A (ja) | 粉体塗装装置 | |
JP4517646B2 (ja) | 自動車ボディの塗装方法 | |
JP4475558B2 (ja) | 塗装金属板の製造方法 | |
JP2005177631A (ja) | 塗装方法 | |
JP2006212777A (ja) | 意匠性に優れた模様塗装金属板とその製造方法 | |
JP5664953B2 (ja) | 鋳鉄管の複層塗膜の形成方法 | |
JP4762613B2 (ja) | 接着剤塗布方法及びその装置 | |
JP4734919B2 (ja) | 塗装方法及び塗装装置 | |
PL235569B1 (pl) | Sposób wytwarzania grzejników płytowych | |
JP6736119B1 (ja) | 塗装被膜鋼材の製造装置及び製造方法 | |
CN102553804A (zh) | 一种气流固化炉 | |
JP6184177B2 (ja) | 被膜を有する送電用鉄塔のパイプ材およびその製造方法 | |
JP2006181498A (ja) | 塗装方法及び塗装システム | |
CN112403864A (zh) | 一种门窗五金表面处理方法 | |
JP2611501B2 (ja) | 自動車用最表面塗装塗料及びこれを用いた自動車車体の塗装方法 | |
JP2019038163A (ja) | 粉体塗装物およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17750342 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2017567004 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2018/009486 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2017750342 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2017750342 Country of ref document: EP Effective date: 20180910 |