WO2019116876A1 - Coque externe et son procédé de fabrication - Google Patents

Coque externe et son procédé de fabrication Download PDF

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Publication number
WO2019116876A1
WO2019116876A1 PCT/JP2018/043427 JP2018043427W WO2019116876A1 WO 2019116876 A1 WO2019116876 A1 WO 2019116876A1 JP 2018043427 W JP2018043427 W JP 2018043427W WO 2019116876 A1 WO2019116876 A1 WO 2019116876A1
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WO
WIPO (PCT)
Prior art keywords
outer shell
thick
thick portion
attachment
thickness
Prior art date
Application number
PCT/JP2018/043427
Other languages
English (en)
Japanese (ja)
Inventor
晴樹 脇坂
龍一 金兒
Original Assignee
Ｋｙｂ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｋｙｂ株式会社 filed Critical Ｋｙｂ株式会社
Priority to DE112018006368.2T priority Critical patent/DE112018006368T5/de
Publication of WO2019116876A1 publication Critical patent/WO2019116876A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/21—Deep-drawing without fixing the border of the blank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B21C1/26—Push-bench drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B21D35/006—Blanks having varying thickness, e.g. tailored blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/063—Making machine elements axles or shafts hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
    • 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
    • F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders

Definitions

  • the present invention relates to an outer shell and a method of manufacturing the same.
  • Patent Document 1 discloses a strut-type shock absorber.
  • the strut type shock absorber is a shock absorber used for a strut type suspension, which is one form of a vehicle suspension system.
  • a shock absorber is utilized as part of a link in a strut type suspension.
  • a knuckle bracket connected to the axle side is fixed by welding to the outer peripheral surface of the outer tube (outer tube) of the strut type shock absorber.
  • a spring seat for supporting one end of a coil spring is fixed by welding to the outer tube.
  • the outer tube is required to have mechanical strength against the force acting on these brackets.
  • weight reduction is required for parts for vehicles for the improvement of a fuel consumption etc.
  • the weight reduction of the shock absorber is particularly effective because it can improve not only the weight but also the exercise performance.
  • this shock absorber in order to reduce the weight of the outer tube, it is generally considered to reduce the plate thickness.
  • simple thinning may lead to a decrease in mechanical strength.
  • the present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide an outer shell capable of securing mechanical strength while achieving weight reduction, and a method of manufacturing the same. .
  • the outer shell of the present invention is formed in a bottomed cylindrical shape whose one end is open.
  • the outer shell comprises a first attachment.
  • the first attachment portion is provided at the end on the bottom side, and the knuckle bracket is attached to the outer peripheral surface.
  • the first attachment portion has a first thick portion, a second thick portion, and a thin portion.
  • the first thick portion is provided on the bottom side, and a first welded portion connecting one end of the knuckle bracket is formed.
  • the second thick portion is provided on the opening side, and a second welded portion is formed to connect the other end of the knuckle bracket.
  • the thin portion is provided between the first thick portion and the second thick portion, and is thinner than the first thick portion and the second thick portion.
  • the portion closer to the opening than the second thick portion may be thinner than the second thick portion.
  • the outer shell of the present invention may include the second attachment portion.
  • the second attachment portion is provided closer to the opening than the first attachment portion, and a spring seat is attached to the outer peripheral surface. And the site
  • the outer shell of the present invention may comprise a third mounting portion.
  • the third attachment portion is provided between the first attachment portion and the second attachment portion, and a stabilizer bracket is attached to the outer circumferential surface.
  • the third mounting portion is formed thicker than the second mounting portion.
  • each plate thickness of the first thick portion and the second thick portion may be 0.5 or more times the plate thickness of the plate forming the knuckle bracket.
  • a welding portion may be formed between the second mounting portion and the spring seat to fix the spring seat to the second mounting portion.
  • the board thickness of the 2nd attaching part may be 0.5 times or more of the board thickness of the board material which forms a spring seat.
  • a welding portion may be formed between the third mounting portion and the stabilizer bracket, for fixing the stabilizer bracket to the third mounting portion.
  • the board thickness of the 3rd attaching part may be 0.5 times or more of the board thickness of the board material which forms a stabilizer bracket.
  • the outer diameters of the first thick portion, the second thick portion, and the thin portion may be formed constant.
  • Each inner diameter of the first thick portion and the second thick portion may be smaller than the inner diameter of the thin portion.
  • the manufacturing method of the outer shell of this invention is a manufacturing method of the said outer shell.
  • This manufacturing method includes a first step, a second step, and a third step.
  • the first step the orifice portion is formed at one end of the cylindrical member.
  • the second step the first mandrel (mandrel) is inserted from the other end of the cylindrical member, and in this state, the die is relatively moved from one end to the other end of the cylindrical member to squeeze it into the cylindrical member
  • portions corresponding to the respective portions of the first thick portion and the thin portion are formed on one end side of the cylindrical member.
  • a second mandrel is inserted from the other end of the cylindrical member, at least a portion corresponding to the tip side of the second thick portion with an outer diameter equal to or less than the outer diameter of the portion in the first mandrel.
  • the outer diameter is reduced through an ironing drawing die in a state in which the inner diameter of the cylindrical member is specified, but the thickness does not change, or the inner diameter of the cylindrical member is not specified. It refers to the process of reducing the outer diameter and slightly increasing the thickness.
  • the term "ironing" refers to a process in which the thickness of the cylindrical member is reduced through a drawing die in a state in which the inner diameter of the cylindrical member is defined.
  • the thickness of the cylindrical member after processing is determined by the outer diameter of a mandrel which is a tool for defining the inner diameter and the inner diameter of a die which is a tool for reducing the outer diameter. When the outer peripheral surface of the mandrel does not abut on the inner peripheral surface of the cylindrical member, the thickness of the processed cylindrical member becomes larger than the original thickness according to the diameter reduction ratio of the outer diameter.
  • the second mandrel in the third step, is used, the outer diameter of which gradually increases in diameter from the tip toward the proximal end, to be closer to the opening than the second thick portion
  • the portion may be formed to be thinner stepwise than the second thick portion.
  • stepwise also includes the case of being gradually thinner in a tapered shape.
  • FIG. 2 is a cross-sectional view showing an outer shell according to Embodiment 1.
  • FIG. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 1) which shows a mouth narrowing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 2) which shows a mouth narrowing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (1) which shows the ironing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 2) which shows an ironing process typically.
  • FIG. 7 is a view schematically showing an intermediate shape of a work piece in the method of manufacturing the outer shell according to the first embodiment. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure which shows typically the state which cut
  • FIG. 5 is a cross-sectional view showing an outer shell according to Embodiment 2.
  • FIG. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 2, and is a figure (the 1) which shows a drawing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 2, and is a figure (the 2) which shows a drawing process typically.
  • FIG. 13 is a view showing an intermediate shape of a work in the method of manufacturing an outer shell according to the second embodiment.
  • the outer shell 1 is an outer shell of a shock absorber in a strut type suspension system for a vehicle. As shown in FIG. 1, the outer shell 1 is formed in a bottomed cylindrical shape whose one end is open. The outer shell 1 has an outer diameter D of the same diameter from the end 1A on the bottom side to the end 1B on the opening side. The outer shell 1 is provided with a first mounting portion 10. Further, the outer shell 1 is provided with a second attachment portion 20 and a third attachment portion 30. A knuckle bracket 40, a spring seat 50, and a stabilizer bracket 60 are attached to each of the first attachment portion 10, the second attachment portion 20, and the third attachment portion 30, respectively.
  • the knuckle bracket 40 is connected to the wheel side (knuckle) of the vehicle.
  • the knuckle bracket 40 is rigidly fastened to the knuckle to make the shock absorber function as a structural part of a part of the link in the suspension system.
  • Components such as tires, wheels, and brake units are attached to the knuckles of the vehicle, and the knuckle bracket 40 is used to buffer these vertical movements while the vehicle is traveling.
  • the shock absorber receives a force or moment when it functions as a structural component of the link.
  • the spring seat 50 is a spring seat that supports one end of a coil spring disposed between the outer shell 1 and the upper mount on the vehicle body side in the suspension system.
  • the spring seat 50 receives the elastic force of the coil spring in the expansion and contraction direction of the shock absorber. For this reason, a small load acts on the spring seat 50 in comparison with the load acting on the knuckle bracket 40.
  • the stabilizer bracket 60 is a bracket to which one end of a stabilizer disposed between the left and right wheels of the vehicle is attached.
  • the stabilizer is a torsion bar attached to the suspension device for the purpose of suppressing the horizontal tilt of the vehicle body and stabilizing the posture.
  • the stabilizer bracket 60 receives a force when this stabilizer is twisted.
  • the force received by the knuckle bracket 40, the spring seat 50 and the stabilizer bracket 60 is the largest for the knuckle bracket 40 directly receiving an impact force or the like from the road surface when the vehicle is traveling, and the spring seat 50 only receives the elastic force of the coil spring. Is the smallest.
  • the first attachment portion 10 is provided at an end portion 1 ⁇ / b> A which is a bottom side of the bottomed cylindrical outer shell 1.
  • a knuckle bracket 40 is attached to the outer peripheral surface of the first attachment portion 10.
  • the knuckle bracket 40 is formed by press-forming a plate material, and has a substantially U-shaped cross section curved along the outer peripheral surface of the outer shell 1.
  • the knuckle bracket 40 is attached to the outer peripheral surface of the first attachment portion 10 in such a manner as to sandwich the first attachment portion 10.
  • the knuckle bracket 40 has a first welded portion 41 and a second welded portion 42 respectively formed at both ends and fixed to the outer peripheral surface of the first mounting portion 10.
  • the first mounting portion 10 includes a first thick portion 11, a second thick portion 12, and a thin portion 13.
  • the first thick portion 11 is provided on the bottom side.
  • the aforementioned first welded portion 41 is formed on the outer peripheral surface of the first thick portion 11, and one end 40A of the knuckle bracket 40 is connected.
  • the thickness t11 of the first thick portion 11 is set such that the thickness ratio t40 / t11 to the thickness t40 of the plate forming the knuckle bracket 40 is less than two. That is, the thickness t11 of the first thick portion 11 secures at least 0.5 times the thickness t40 of the knuckle bracket 40.
  • the second thick portion 12 is provided closer to the end 1B on the opening side.
  • the above-mentioned second welding portion 42 is formed on the outer peripheral surface of the second thick portion 12, and the other end 40B of the knuckle bracket 40 is connected.
  • the thickness t12 of the second thick portion 12 is substantially equal to that of the first thick portion 11. Therefore, the plate thickness t12 of the second thick portion 12 is also ensured to be 0.5 times or more of the plate thickness t40 of the knuckle bracket 40.
  • the thin portion 13 is provided between the first thick portion 11 and the second thick portion 12.
  • the thickness t13 of the thin portion 13 is thinner than the thicknesses t11 and t12 of the first thick portion 11 and the second thick portion 12.
  • the thin-walled portion 13 has an inner diameter larger than the inner diameters of the first thick portion 11 and the second thick portion 12. It is formed to be thin.
  • the inner peripheral surface between the thin portion 13 and the first thick portion 11 and the second thick portion 12 is loosely connected in a tapered manner.
  • the second attachment portion 20 is provided on the side of the end portion 1 ⁇ / b> B that is closer to the opening than the first attachment portion 10.
  • a spring seat 50 is attached to the outer peripheral surface of the second attachment portion 20.
  • the spring sheet 50 is formed in a plate shape which is expanded to one side by press-forming a plate material. Further, the spring seat 50 is formed with a through hole 50A.
  • the spring seat 50 is attached to the outer peripheral surface of the outer shell 1 in such a manner as to penetrate the outer shell 1 through the through holes 50A and expand toward the end 1B side.
  • a welded portion 51 is formed between the peripheral edge of the through hole 50A and the outer peripheral surface of the outer shell 1. The spring seat 50 is fixed to the second mounting portion 20 by the welded portion 51.
  • the third attachment portion 30 is provided between the first attachment portion 10 and the second attachment portion 20, as shown in FIG.
  • a stabilizer bracket 60 is attached to the outer peripheral surface of the third attachment portion 30.
  • the stabilizer bracket 60 is formed by press-forming a plate material, and is formed curved along the outer peripheral surface of the outer shell 1 (not shown).
  • a welded portion 61 is formed at the periphery of the contact surface of the stabilizer bracket 60 with the outer peripheral surface of the outer shell 1.
  • the stabilizer bracket 60 is fixed to the third mounting portion 30 by the welded portion 61.
  • a portion on the end 1 ⁇ / b> B side closer to the opening than the second attachment portion 20 is an opening side end 70.
  • One end of a dust boot is attached to the outer peripheral surface of the open end 70 in a product shock absorber.
  • the dust boot is a member that extends along with the extension of the shock absorber to protect the piston rod.
  • the dust boot is usually formed of a bellows-like cylindrical elastic body.
  • the second attachment portion 20, the third attachment portion 30, and the opening side end portion 70 extend from the second thick portion 12 to the end portion 1B.
  • the third mounting portion 30, the second mounting portion 20, and the opening side end portion 70 are disposed in this order.
  • the third mounting portion 30, the second mounting portion 20, and the opening side end portion 70 are formed to have the same thickness as the thickness t12 of the second thick portion 12. In other words, the portion of the outer shell 1 closer to the end portion 1B than the second thick portion 12 is formed to have a constant plate thickness t12.
  • the outer shell 1 is formed by processing a work W (illustrated as a cylindrical member according to the present invention) having an outer diameter D0 and a plate thickness t0 shown in FIG.
  • the outer diameter D0 of the work W is larger than the outer diameter D of the outer shell 1.
  • the thickness t0 of the work W and the thickness (t11, t12) of the thickest portion of the outer shell 1 are substantially equal.
  • the apertured portion w1 is formed at one end WA of the work W (first step).
  • the apertured portion w1 is formed by pressing the end portion WA against the apertured die T1 as shown in FIG.
  • the aperture drawing die T1 is formed in a tapered shape whose inner peripheral surface is reduced in diameter in a mortar shape, and the end portion WA of the work W is formed in a tapered shape following this.
  • the first mandrel C1 is inserted from the other end WB of the work W.
  • at least one of the drawing process and the ironing process on the work W is performed by relatively moving the drawing die (illustrated as a die according to the present invention) T2 from the end WA to the end WB of the work W.
  • Apply (the second step) As a result, a portion w11 corresponding to the first thick portion 11 and a portion w13 corresponding to the thin portion 13 are formed on the end portion WA side of the work W.
  • the first mandrel C ⁇ b> 1 is inserted from the other end WB of the workpiece W and abuts on the aperture w 1.
  • the first mandrel C1 is moved in the axial direction, and the work W is passed through the drawing die T2 (see FIG. 5).
  • the first mandrel C1 is formed to have an outer diameter equal to the inner diameter d13 of the thin-walled portion 13 and a diameter reduced to an outer diameter equal to the inner diameter d11 of the first thick portion 11 at the tip end
  • the part c11 is formed.
  • the reduced diameter portion c11 is loosely connected in a tapered manner.
  • a through hole having an inner diameter at the reduced diameter portion T2A equal to the outer diameter D of the outer shell 1 is formed.
  • the difference between the inner diameter D of the reduced diameter portion T2A of the ironing die T2 and the outer diameter d11 of the reduced diameter portion c11 of the mandrel C is twice the thickness t0 of the workpiece W before processing.
  • the plate thickness t11 after processing becomes substantially equal to the plate thickness t0 before processing. Therefore, the leading end portion of the work W is subjected to drawing processing by passing the work W into which the first mandrel C1 is inserted through a drawing die D2. Further, ironing processing is applied to a portion adjacent to the tip end portion of the work W. Thereby, a portion w11 corresponding to the first thick portion 11 having the outer diameter D and the inner diameter d11 is formed by drawing on the work W, and a portion w13 corresponding to the thin portion 13 having the outer diameter D and the inner diameter d13 is ironing It is formed by In the second step, as shown in FIG. 5, the ironing die T2 is temporarily stopped when it passes through the portion w13 corresponding to the thin portion 13 of the work W, and is returned to the end WA side again.
  • the second mandrel C2 is inserted from the end WB of the workpiece W.
  • the ironing die T2 is relatively moved from the end WA of the work W toward the end WB to apply at least one of drawing and ironing to the work W (third process).
  • a portion corresponding to a portion closer to the opening than the portion w12 corresponding to the second thick portion 12 and the second thick portion 12 is formed.
  • the second mandrel C2 is inserted from the other end WB of the work W and abuts against the aperture w1.
  • the second mandrel C2 is moved in the axial direction, and the work W is passed through the drawing die T2.
  • the second mandrel C2 is formed to have an outer diameter equal to the inner diameter d12 of the second thick portion 12 (the inner diameter d11 of the first thick portion 11), and has a smaller diameter than the first mandrel C1.
  • the work W with the second mandrel C2 inserted is passed through a drawing die T2. Thereby, the drawing process is performed on the work W. Further, in this process, the ironing die T2 is passed to the end WB side of the work W.
  • the workpiece W is formed with an outer diameter D from the end WA to the end WB. Further, a portion closer to the end portion WB than a portion corresponding to the thin portion 13 of the work W is formed with an inner diameter d12 (d11).
  • part by the side of this opening part is a site
  • both ends of the workpiece W are cut to process the end face.
  • the end WA side is subjected to closing processing or cap welding to form a portion to be the end 1A on the bottom side.
  • the knuckle bracket 40, the spring seat 50, and the stabilizer bracket 60 are welded and fixed to form the outer shell 1 shown in FIG.
  • the outer shell 1 of Embodiment 1 is formed in the bottomed cylindrical shape which one end part 1B opened.
  • the outer shell 1 is provided with a first mounting portion 10.
  • the first attachment portion 10 is provided at the end portion 1A on the bottom side, and the knuckle bracket 40 is attached to the outer peripheral surface.
  • the first attachment portion 10 includes a first thick portion 11, a second thick portion 12, and a thin portion 13.
  • the first thick portion 11 is provided on the bottom side, and a first welded portion 41 connecting one end 40A of the knuckle bracket 40 is formed.
  • the second thick portion 12 is provided on the opening side, and a second welded portion 42 connecting the other end 40B of the knuckle bracket 40 is formed.
  • the thin portion 13 is provided between the first thick portion 11 and the second thick portion 12 and is thinner than the first thick portion 11 and the second thick portion 12.
  • the outer shell 1 has a portion between the portions at both ends where the welded portion is formed. It is formed thin. As a result, at the welding portion with the knuckle bracket 40, sufficient strength for welding is secured. Moreover, although the thin part 13 which is a part between the two thick parts 11 and 12 is formed to be thin, the knuckle bracket 40 is welded at both ends, so that the rigidity of the knuckle bracket 40 is utilized. The strength is secured.
  • the outer shell 1 of the first embodiment can secure mechanical strength while achieving weight reduction.
  • each of the plate thicknesses t11 and t12 of the first thick portion 11 and the second thick portion 12 in which the welded portions 41 and 42 are formed in the first attachment portion 10 The thickness of the plate material forming the knuckle bracket 40 is 0.5 or more times the plate thickness t40. For this reason, in fixation by the welding parts 41 and 42, generation
  • a welded portion 51 is formed between the spring seat 50 and the outer peripheral surface of the outer shell 1, and the spring seat 50 is fixed to the second mounting portion 20 by the welded portion 51.
  • the thickness t20 of the second attachment portion 20 is 0.5 or more times the thickness of the plate forming the spring sheet 50. For this reason, in fixation by the welding part 51, generation
  • a welded portion 61 is formed between the stabilizer bracket 60 and the outer peripheral surface of the outer shell 1, and the stabilizer bracket 60 is fixed to the third mounting portion 30 by the welded portion 61.
  • the thickness t30 of the third attachment portion 30 is 0.5 or more times the thickness of the plate forming the stabilizer bracket 60. For this reason, in fixation by the welding part 61, generation
  • the manufacturing method of the outer shell 1 of Embodiment 1 contains a 1st process, a 2nd process, and a 3rd process.
  • the apertured portion w1 is formed at one end WA of the work W which is a cylindrical member.
  • the first mandrel C1 is inserted from the other end WB of the work W.
  • the drawing die T2 is relatively moved from the end WA to the end WB of the workpiece W to perform drawing and ironing on the workpiece W, and corresponds to the first thick portion 11 and the thin portion 13
  • the portions w11 and w13 to be formed are formed.
  • the second mandrel C2 is inserted from the end portion WB of the work W at least a portion corresponding to the thin portion 13 to a diameter smaller than the outer diameter of the portion in the first mandrel C1. Then, in this state, the drawing die T2 is relatively moved from the end WA to the end WB of the workpiece W to perform drawing on the workpiece W, and a portion w12 corresponding to the second thick portion 12 and the second portion A portion corresponding to the opening side with respect to the thick portion 12 is formed.
  • the method of manufacturing the outer shell is to insert the first mandrel C1 inserted from the other end WB of the work W and pass the ironing die T2 from the end WA to form the first thick portion of the first mounting portion 10
  • the portions w11 and w13 corresponding to the portion 11 and the thin portion 13 are formed.
  • the second mandrel C2 is inserted and the ironing die T2 is inserted, whereby the portion w12 corresponding to the second thick portion 12 and the opening side of the second thick portion 12
  • the portions corresponding to the respective portions of the third attachment portion 30, the second attachment portion 20, and the opening side end portion 70 which are the portions corresponding to the above are formed.
  • the manufacturing method of the outer shell of this invention can obtain easily the outer shell which weight reduction was achieved and mechanical strength was also ensured.
  • the plate thicknesses t11, t12 and t13 of the work W are changed by keeping the outer diameter D constant and changing the inner diameters d11, d12 and d13. It is possible to realize a simple and beautiful outer shell without a step.
  • the plate thickness of the thin portion 13 is reduced to a plate of a portion other than the thin portion 13. By increasing the thickness, it is possible to reduce the weight of the first mounting portion 10 and to improve the strength of the other portion.
  • the outer shell 201 according to the second embodiment is the same as the outer shell 1 of the first embodiment in that the first mounting portion 10 having the first thick portion 11, the second thick portion 12, and the thin portion 13 is provided. .
  • the outer shell 201 is different from the first embodiment in that the portion on the end portion 201B side closer to the opening than the second thick portion 12 is formed thinner than the second thick portion 12.
  • parts having substantially the same configurations and functions as those of the first embodiment described above are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.
  • a portion closer to the opening than the second thick portion 12 is thinner than the second thick portion 12.
  • the third mounting portion 30, the second mounting portion 20, and the opening side end portion 70 which are portions closer to the opening than the second thick portion 12, have plate thicknesses t30, t20, and t70, respectively. It is thinner than the thickness t12 of the second thick portion 12.
  • the opening side end 70 which is a portion closer to the opening than the second mounting portion 20 is formed thinner than the second mounting portion 20.
  • the plate thickness t70 of the opening side end 70 is thinner than the plate thickness t20 of the second attachment portion 20.
  • the second attachment portion 20 is provided closer to the opening than the second thick portion 12 and is thinner than the second thick portion 12. That is, the thickness t70 of the opening side end 70, the thickness t20 of the second attachment portion 20, and the thickness t12 of the second thick portion 12 have a relationship of t12> t20> t70.
  • the third attachment portion 30 is formed thicker than the second attachment portion 20.
  • the plate thickness t30 of the third mounting portion 30 is formed thicker than the plate thickness t20 of the second mounting portion 20. That is, since the third attachment portion 30 is provided closer to the opening than the second thick portion 12, the plate thickness t30 is thinner than the plate thickness t12 of the second thick portion 12, but It is formed thicker than the plate thickness t20 of the second mounting portion 20 provided on the opening side of the second thick portion 12 and further on the opening side of the third mounting portion 30. There is. That is, the thickness t30 of the third mounting portion 30, the thickness t20 of the second mounting portion 20, and the thickness t12 of the second thick portion 12 have a relationship of t12> t30> t20.
  • the outer shell 201 has a plate thickness of each of the third mounting portion 30, the second mounting portion 20, and the opening side end portion 70 which is a portion closer to the opening than the second thick portion 12.
  • t30, t20, and t70 have a relationship of t12> t30> t20> t70 with respect to the thickness t12 of the second thick portion 12.
  • These portions are provided in order from the end 201A on the bottom side of the outer shell 201 toward the end 201B on the opening side. Therefore, the portion closer to the opening than the second thick portion 12 is formed to be thinner in a stepwise manner toward the end 201B on the opening side.
  • the inner peripheral surface between each part from which an internal diameter differs is loosely connected in the shape of a taper.
  • the plate thickness t20 of the second mounting portion 20 is set in such a manner that the plate thickness ratio t50 / t20 to the plate thickness t50 of the plate material forming the spring sheet 50 is less than two. That is, the plate thickness t20 of the second mounting portion 20 secures at least 0.5 times the plate thickness t50 of the spring seat 50.
  • the plate thickness t30 of the third mounting portion 30 is set in such a manner that the plate thickness ratio t60 / t30 to the plate thickness t60 of the plate material forming the stabilizer bracket 60 is less than two. That is, the plate thickness t30 of the third mounting portion 30 secures at least 0.5 times the plate thickness t60 of the stabilizer bracket 60.
  • one end of the dust boot is attached to the outer peripheral surface of the opening side end 70.
  • the dust boot is usually formed of a bellows-like cylindrical elastic body.
  • the open end 70 is only affected by a small external force as compared to other parts, and mechanical strength is relatively unnecessary. Therefore, although the plate thickness t70 of the opening side end 70 is the thinnest in the outer shell 201, sufficient mechanical strength is secured.
  • the outer shell 201 has an outer diameter substantially constant D in the axial direction, similarly to the outer shell 1 of the first embodiment. Then, by forming the inner diameter in a stepwise manner toward the end portion 1B on the end portion 1B side with respect to the second thick portion 12, the formation of the stepwise thickness difference is realized.
  • the outer shell 201 is formed by performing at least one of drawing and ironing on a cylindrical work W having an outer diameter D0 and a plate thickness t0, as in the first embodiment. Then, in the method of manufacturing the outer shell 201, first, as the first step, the apertured portion w1 is formed using the apertured die T1 (see FIGS. 2 and 3), and then, as the second step, 1. A portion corresponding to the first thick portion 11 and the thin portion 13 is formed by using the mandrel C1 and the ironing die T2 (see FIGS. 4 and 5). These are the same as in the first embodiment.
  • the second mandrel C202 is inserted from the end WB of the workpiece W.
  • the ironing die T2 is relatively moved from the end WA of the work W toward the end WB to apply at least one of drawing and ironing to the work W (third process).
  • a portion corresponding to a portion closer to the opening than the portion w12 corresponding to the second thick portion 12 and the second thick portion 12 is formed.
  • the second mandrel C202 is formed such that its tip end has an outer diameter equal to the inner diameters d11 and d12 of the first thick portion 11 and the second thick portion 12, and this point is implemented This is the same as the second mandrel C2 of the first embodiment.
  • the three parts of the part c70 corresponding to the opening side end part 70 are formed by being gradually expanded in diameter toward the base end side in order.
  • the workpiece W into which the second mandrel C202 is inserted is passed through a drawing die T2. Thereby, the workpiece W is subjected to the ironing process. Further, in this process, the ironing die T2 is passed to the end WB side of the work W. Thereby, as shown in FIG. 13, the workpiece W is formed with an outer diameter D from the end WA to the end WB. Further, the portion closer to the end WB than the portion corresponding to the thin portion 13 of the work W has a shape conforming to the outer shape of the second mandrel C202, and the diameter is enlarged stepwise toward the end WB of the work W It is formed. The portions having different outer diameters are loosely connected in a tapered manner.
  • the work W is formed to have an outer diameter D from the end WA to the end WB, and an inner diameter at a portion closer to the end WB than a portion corresponding to the thin portion 13 of the work W
  • Respective portions w12, w30, w20 and w70 whose diameter is increased stepwise are formed by d12 (d11), d30, d20 and d70.
  • the work W is formed to have an outer diameter D, and a portion w12 corresponding to the second thick portion 12 of the inner diameter d12 (d11) and an opening side than the portion w12 corresponding to the second thick portion 12
  • Ru The thickness of each of these portions w30, w20 and w70 is t30, t20 and t70, respectively.
  • both ends of the workpiece W are cut to adjust the end face.
  • the end portion 201A on the bottom side is formed by performing closing processing or cap welding on the end portion WA side.
  • the knuckle bracket 40, the spring seat 50, and the stabilizer bracket 60 are welded and fixed to form the outer shell 201 (see FIG. 11).
  • Embodiment 2 can acquire the effect similar to the above-mentioned Embodiment 1.
  • each portion of the third attachment portion 30, the second attachment portion 20, and the opening side end portion 70 which are portions closer to the opening than the second thick portion 12, have a second thickness. It is thinner than the meat portion 12. For this reason, sufficient strength can be secured in each portion while achieving further weight reduction.
  • the outer shell 201 of the second embodiment includes the second attachment portion 20, and the second attachment portion 20 is provided closer to the opening than the first attachment portion 10, and the spring seat 50 is provided on the outer peripheral surface. It is attached.
  • the opening-side end 70 which is a portion closer to the opening than the second attachment portion 20 is thinner than the second attachment portion 20. For this reason, it is possible to achieve further weight reduction while obtaining sufficient strength for each mounting portion.
  • the outer shell 201 of the second embodiment is provided with the third attachment portion 30.
  • the third attachment portion 30 is provided between the first attachment portion 10 and the second attachment portion 20 and is provided on the outer peripheral surface.
  • the stabilizer bracket 60 is attached.
  • the third mounting portion 30 is formed thicker than the second mounting portion 20. For this reason, it is possible to realize a lightweight outer shell while obtaining sufficient strength for each mounting portion.
  • the manufacturing method of the outer shell 201 of Embodiment 2 can manufacture easily the outer shell which can ensure mechanical strength, achieving weight reduction similarly to the above-mentioned Embodiment 1.
  • FIG. 1 the manufacturing method of the outer shell 201 of Embodiment 2 can manufacture easily the outer shell which can ensure mechanical strength, achieving weight reduction similarly to the above-mentioned Embodiment 1.
  • the second thick portion 12 is formed using the second mandrel C 202 whose outer diameter gradually increases from the tip toward the proximal end.
  • the portions corresponding to the respective portions of the third attachment portion 30, the second attachment portion 20, and the opening side end portion 70, which are also portions corresponding to the opening side, are stepwise than the portions corresponding to the second thick portion 12 And thin in steps toward the end WB. For this reason, it is possible to easily obtain a lighter outer shell.
  • the present invention is not limited to the embodiments described above with reference to the drawings.
  • the following embodiments are also included in the technical scope of the present invention.
  • (1) In the first and second embodiments the same drawing and drawing dies are used in the second and third steps, but different drawing and drawing dies may be used. In this case, the inner diameter of the reduced diameter portion of the die used in the second step may be larger than that of the die used in the third step.
  • the third attachment portion is provided, and the stabilizer bracket is attached to the third attachment portion.
  • the outer shell according to the present invention may be an outer shell which does not have the third attachment portion and to which the stabilizer bracket is not attached.
  • the configuration in which the portion closer to the opening than the second mounting portion is formed thinner than the second mounting portion is exemplified. The portions of and may be formed in the same thickness.
  • the second attachment portion which is the opening side portion of the third attachment portion, and the portion of the opening portion side of the second attachment portion are thinner than the third attachment portion and have a constant thickness.
  • the configuration in which the portion closer to the opening than the third mounting portion is formed to be thinner in stages than the third mounting portion has been exemplified. You may form the site
  • the portion closer to the opening is formed thinner than the second thick portion in a stepwise manner, but the portion closer to the opening than the second thick portion is It may be thinly formed in a taper shape which is one form of target.
  • the portion closer to the opening is formed thinner than the second thick portion, but this is not essential.
  • the second attachment portion and the portion closer to the opening than the second attachment portion may be formed to have the same thickness. That is, the portion on the opening side of the third attachment portion may be formed to be thinner than the second thick portion with a constant plate thickness.
  • the spring seat is fixed to the second mounting portion by the welded portion formed between the second mounting portion and the outer peripheral surface of the second mounting portion. It may be in the form of being attached by a fixing method of Alternatively, for example, a method may be employed in which a plurality of processing (bulge processing) is performed in which the outer peripheral surface is expanded radially outward from the inside (bulge processing), and then a spring seat is pressed in and fixed.
  • the stabilizer bracket is fixed to the third mounting portion by the welded portion formed between the third mounting portion and the outer peripheral surface. It may be in the form of being attached by a fixing method of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

L'invention concerne : une coque externe avec laquelle une résistance mécanique peut être assurée tout en obtenant une réduction de poids ; et un procédé de fabrication de la coque externe. Cette coque externe (1) prend la forme d'un cylindre à fond qui est ouvert à une de ses extrémités. La coque externe (1) est pourvue d'une première section de fixation (10) qui est disposée sur une section d'extrémité (1A) sur un côté section inférieure, et a un support d'articulation (40) fixé à la surface circonférentielle externe de cette dernière. La première section de fixation (10) a une première section épaisse (11), une seconde section épaisse (12) et une section mince (13). La première section épaisse (11) est disposée sur le côté de section inférieure et comporte formée sur cette dernière une première section de soudage (41) destinée à relier une section d'extrémité du support d'articulation (40). La seconde section épaisse (12) est disposée sur le côté ouverture et comporte formée sur celle-ci une seconde section de soudage (42) destinée à relier l'autre section d'extrémité du support d'articulation (40). La section mince (13) est située entre la première section épaisse (11) et la seconde section épaisse (12), et est formée plus mince que la première section épaisse (11) et à la seconde section épaisse (12).
PCT/JP2018/043427 2017-12-14 2018-11-26 Coque externe et son procédé de fabrication WO2019116876A1 (fr)

Priority Applications (1)

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DE112018006368.2T DE112018006368T5 (de) 2017-12-14 2018-11-26 Außenhülle und Verfahren zur Herstellung der Außenhülle

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JP2017239326A JP6884686B2 (ja) 2017-12-14 2017-12-14 アウターシェル及びその製造方法
JP2017-239326 2017-12-14

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WO2019116876A1 true WO2019116876A1 (fr) 2019-06-20

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JP (1) JP6884686B2 (fr)
DE (1) DE112018006368T5 (fr)
WO (1) WO2019116876A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022083482A (ja) 2020-11-25 2022-06-06 Ｋｙｂ株式会社 緩衝器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5632141U (fr) * 1979-08-21 1981-03-28
JPS6030498Y2 (ja) * 1980-04-08 1985-09-12 カヤバ工業株式会社 ストラツト型シヨツクアブソ−バ
JPS60150113U (ja) * 1984-03-19 1985-10-05 トヨタ自動車株式会社 シヨツクアブソ−バ
JPH09105437A (ja) * 1995-08-07 1997-04-22 Kayaba Ind Co Ltd ショックアブソーバ
JP2000211333A (ja) * 1999-01-25 2000-08-02 Nippon Light Metal Co Ltd 車輌用ショックアブソ―バ及びその製造方法
JP2001182772A (ja) * 1999-10-15 2001-07-06 Showa Corp 倒立型油圧緩衝器
JP2009192068A (ja) * 2008-02-18 2009-08-27 Hitachi Ltd ストラット式流体圧緩衝器およびベースシェルの製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5632141U (fr) * 1979-08-21 1981-03-28
JPS6030498Y2 (ja) * 1980-04-08 1985-09-12 カヤバ工業株式会社 ストラツト型シヨツクアブソ−バ
JPS60150113U (ja) * 1984-03-19 1985-10-05 トヨタ自動車株式会社 シヨツクアブソ−バ
JPH09105437A (ja) * 1995-08-07 1997-04-22 Kayaba Ind Co Ltd ショックアブソーバ
JP2000211333A (ja) * 1999-01-25 2000-08-02 Nippon Light Metal Co Ltd 車輌用ショックアブソ―バ及びその製造方法
JP2001182772A (ja) * 1999-10-15 2001-07-06 Showa Corp 倒立型油圧緩衝器
JP2009192068A (ja) * 2008-02-18 2009-08-27 Hitachi Ltd ストラット式流体圧緩衝器およびベースシェルの製造方法

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JP6884686B2 (ja) 2021-06-09
DE112018006368T5 (de) 2020-10-01
JP2019105342A (ja) 2019-06-27

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