WO2016060055A1 - Roller burnishing device - Google Patents

Roller burnishing device Download PDF

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Publication number
WO2016060055A1
WO2016060055A1 PCT/JP2015/078585 JP2015078585W WO2016060055A1 WO 2016060055 A1 WO2016060055 A1 WO 2016060055A1 JP 2015078585 W JP2015078585 W JP 2015078585W WO 2016060055 A1 WO2016060055 A1 WO 2016060055A1
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WO
WIPO (PCT)
Prior art keywords
crankshaft
rollers
roller
burnish
shaft portion
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PCT/JP2015/078585
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French (fr)
Japanese (ja)
Inventor
成瀬裕行
永井浩行
徳市広樹
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本田技研工業株式会社
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Publication of WO2016060055A1 publication Critical patent/WO2016060055A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution

Definitions

  • the present invention relates to a roller burnishing apparatus that burnishes the outer peripheral surface of a shaft portion of a crankshaft.
  • Vanishing is performed by, for example, pressing a processing tool (diamond tip) on the surface of a metal workpiece in a point-contacted manner and moving it relatively, and in a relatively short time without generating chips.
  • a processing tool diamond tip
  • the processing tool may drop into the oil supply hole opened in the outer peripheral surface, or the processing tool and the balance weight may interfere with each other.
  • Japanese Patent Laid-Open No. 6-190718 discloses a technical idea of avoiding balance weight interference by transmitting a pressing force of a hydraulic cylinder to a burnish roller via one backup roller.
  • one burnish roller 200 is pressed against the outer peripheral surface of the shaft portion of the crankshaft 202 in a line-contact state, so that the burnish roller 200 is pressed against the shaft portion of the crankshaft 202.
  • It may be slippery in the circumferential direction with respect to the outer peripheral surface, and the pressing force may not be efficiently applied to the outer peripheral surface of the shaft portion of the crankshaft 202. Therefore, the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft 202 may be reduced.
  • the present invention has been made in consideration of such problems, and a roller burnish processing apparatus capable of increasing the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft with a simple configuration while avoiding balance weight interference.
  • the purpose is to provide.
  • a roller burnishing apparatus is a roller burnishing apparatus that burns the outer peripheral surface of a shaft portion of a crankshaft, and extends along the axial direction of the crankshaft.
  • a pair of burnish rollers having an outer diameter smaller than the outer diameter of the shaft portion of the crankshaft, support means for rotatably supporting the pair of burnish rollers, and each vanish roller facing the shaft portion of the crankshaft
  • a pressing mechanism that presses and presses, and the pressing mechanism has a first backup roller that rotates in contact with the outer peripheral surface of each of the burnish rollers, and the pair of burnish rollers are provided on the shaft portion of the crankshaft.
  • the pair of burnish rollers arranged side by side along the circumferential direction of the shaft portion of the crankshaft are brought into contact with the outer peripheral surface of the shaft portion of the crankshaft. It is possible to make it difficult to slip in the circumferential direction with respect to the outer peripheral surface of the. Accordingly, a predetermined pressing force can be efficiently applied from the pressing mechanism to the outer peripheral surface of the shaft portion of the crankshaft via each burnish roller, so that the processing efficiency of the shaft portion can be increased with a simple configuration. it can. In addition, since the pressing force is transmitted to each burnish roller via the first backup roller, interference between the balance weight and the pressing mechanism can be avoided.
  • the pair of burnish rollers have the same outer diameter, and are equidistant from a line segment connecting the axis of the crankshaft shaft and the rotation axis of the first backup roller.
  • the positions may be spaced apart from each other.
  • substantially the same pressing force can be transmitted to each burnish roller via the first backup roller, and the pair of burnish rollers are circumferentially arranged with respect to the outer peripheral surface of the shaft portion of the crankshaft. It is possible to make it more difficult to slip.
  • the pressing mechanism may include a second backup roller that rotates in contact with an outer peripheral surface of the first backup roller.
  • the support means is disposed so as to sandwich the pair of burnish rollers, and rotates in contact with the outer peripheral surface of the burnish roller. And a retainer.
  • the outer peripheral surface of the burnish roller can be prevented from coming into contact with the retainer and being damaged, so that high machining accuracy can be maintained.
  • the outer diameter of each of the burnish rollers may be set to 1/10 or more and 1/5 or less of the outer diameter of the shaft portion of the crankshaft.
  • the pressing force can be more efficiently applied to the outer peripheral surface of the shaft portion of the crankshaft while suppressing breakage of the burnish roller.
  • a pair of burnish rollers arranged side by side along the circumferential direction of the shaft portion of the crankshaft is brought into contact with the outer peripheral surface of the shaft portion of the crankshaft, and is pressed against each burnish roller via the first backup roller. Since the pressure is transmitted, the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft can be increased with a simple configuration while avoiding the interference of the balance weight.
  • FIG. 2 is a longitudinal sectional view taken along line II-II in FIG.
  • FIG. 3 is a longitudinal sectional view taken along line III-III in FIG. 2.
  • It is a top view of the support part shown in FIG. It is explanatory drawing which shows the positional relationship of a pair of burnish roller. It is a top view of the support part concerning a modification.
  • FIG. 7A is an explanatory view of a roller burnishing apparatus according to a modified example including two receiving rollers
  • FIG. 7B is an explanatory view of a roller burnishing apparatus according to a modified example including three receiving rollers. It is explanatory drawing of the roller burnishing apparatus which concerns on the modification provided with two process part main bodies. It is explanatory drawing of the burnishing which concerns on a prior art.
  • a roller burnishing apparatus 10 burns (shakes) a shaft portion 102 (crank journal 104 and crank pin 106) of a crankshaft 100.
  • crankshaft 100 as a workpiece will be described.
  • the crankshaft 100 is used as a component part of an engine such as an automobile, for example, and a plurality of crank journals 104 pivotally supported by a cylinder block (not shown), a plurality of crankpins 106 to which a connecting rod of a piston (not shown) is attached, A plurality of crank arms 108 for connecting the crank journal 104 and the crank pin 106 and a plurality of balance weights 110 provided on the crank arm 108 are provided.
  • the axis Ax1 of the crank journal 104 and the axis Ax2 of the crank pin 106 extend in parallel at positions that do not overlap each other. As shown in FIG. 3, an arcuate fillet portion 112 is formed between the crank journal 104 and the crank arm 108 (boundary portion) and between the crank pin 106 and the crank arm 108 (boundary portion). ing. An oil supply hole 114 is opened on the outer peripheral surfaces of the crank journal 104 and the crankpin 106.
  • the roller burnishing apparatus 10 includes a processing unit main body 12 attached to a moving mechanism (not shown).
  • the processing unit main body 12 includes a pair of burnish rollers 14 and 16 configured in a columnar shape or a cylindrical shape, a pressing mechanism 18 that presses the burnish rollers 14 and 16 toward the shaft portion 102 of the crankshaft 100, and a burnish roller. And a support portion (support means) 20 for supporting the members 14 and 16.
  • the pair of burnish rollers 14 and 16 are juxtaposed along the circumferential direction of the shaft portion 102 of the crankshaft 100 in a state of extending along the axial direction (arrow X direction) of the crankshaft 100.
  • the overall lengths of the burnishing rollers 14 and 16 are set slightly longer than the width of the shaft portion 102 that performs burnishing on the crankshaft 100. Thereby, the outer peripheral surface of the axial part 102 of the crankshaft 100 can be burnished efficiently.
  • the pair of burnish rollers 14 and 16 have the same outer diameter.
  • the outer diameters of the burnish rollers 14 and 16 are set to be smaller than the outer diameter of the shaft portion 102 where the burnishing process is performed on the crankshaft 100.
  • the outer diameter of each of the burnish rollers 14 and 16 is preferably set to a size of 1/10 or more and 1/5 or less of the outer diameter of the shaft portion 102.
  • the burnish rollers 14 and 16 are easily damaged, and the outer diameter of the burnish rollers 14 and 16 is smaller than the outer diameter of the shaft portion 102. This is because if the diameter is larger than 1/5 of the diameter, the pressing force cannot be efficiently increased on the outer peripheral surface of the shaft portion 102.
  • the pressing mechanism 18 includes first to third backup rollers 22, 24, 26 that rotate as the pair of burnish rollers 14, 16 rotate, and first to third backup rollers 22, 24, 26 that pivotally support the first to third backup rollers 22, 24, 26.
  • 1st to 3rd support shafts 28, 30, 32 a holder 34 for holding the 1st to 3rd support shafts 28, 30, 32, a plurality of disc springs (biasing means) 36 for pressing the holder 34, and a plurality of And a spring support portion 38 for supporting the disc spring 36.
  • the first backup roller 22 is in contact with the outer peripheral surfaces of the pair of burnish rollers 14 and 16 while being supported by the first support shaft 28.
  • the second backup roller 24 is in contact with the outer peripheral surface of the first backup roller 22 while being supported by the second support shaft 30.
  • the third backup roller 26 is in contact with the second backup roller 24 while being supported by the third support shaft 32.
  • the first to third support shafts 28, 30, and 32 extend along the axial direction of the crankshaft 100.
  • the axis lines Ax3, Ax4, Ax5 of the first to third support shafts 28, 30, 32 extend in parallel to the axis lines Ax1, Ax2 of the shaft portion 102 of the crankshaft 100.
  • the holder 34 includes a pair of cover portions 40, 42 disposed so as to sandwich the first to third backup rollers 22, 24, 26 from the axial direction of the crankshaft 100, and a plurality of fastening portions for fastening the cover portions 40, 42. It includes a bolt 44 and a connecting portion 46 that is provided at an end of each cover portion 40, 42 opposite to the side where the burnish rollers 14, 16 are located and connects the cover portions 40, 42.
  • Each of the cover portions 40 and 42 has a thin tip at the tip side close to the burnish rollers 14 and 16 and a thick base at the base end near the connecting portion 46.
  • the cover portions 40 and 42 each have a thin portion covering the first backup roller 22 and the second backup roller 24 and a thick portion covering the third backup roller 26.
  • the number and size of the disc springs 36 are set according to the surface roughness required for the outer peripheral surface of the shaft portion 102 of the crankshaft 100.
  • a plurality of disc springs 36 are used as urging means for pressing the holder 34 in order to reduce the size of the pressing mechanism 18, but the urging means may be a coil spring or the like.
  • the spring support portion 38 is a block-like member in which an arrangement hole 48 in which a plurality of disc springs 36 are arranged is formed.
  • the spring support portion 38 is provided on the bottom surface of the arrangement hole 48 and is arranged on each of the disc springs 36. It has the support
  • the support portion 20 includes a pair of retainers 54 and 56 attached to the cover portions 40 and 42 by a plurality of bolts 52, and a pair of guide rollers 58 pivotally supported by the retainers 54 and 56. 60.
  • the retainers 54 and 56 are formed in a substantially U shape in plan view, and the burnish rollers 14 and 16 and the guide rollers 58 and 60 are arranged in the internal space of the U shape.
  • the pair of retainers 54 and 56 are arranged in parallel at a predetermined distance from each other in a direction orthogonal to the axial direction of the burnish rollers 14 and 16 so that the U-shaped openings face each other.
  • the spacing between the pair of retainers 54 and 56 can be set arbitrarily, but is set smaller than the outer diameter of the burnish rollers 14 and 16, for example.
  • the pair of guide rollers 58 and 60 are disposed so as to sandwich the pair of burnish rollers 14 and 16.
  • Each of the guide rollers 58 and 60 extends along the axial direction of the burnish rollers 14 and 16, and both end portions thereof are formed with a small diameter and the central portion thereof is formed with a large diameter.
  • the outer peripheral surfaces of the large diameter portions of the guide rollers 58 and 60 are rotated in contact with the outer peripheral surfaces of the burnish rollers 14 and 16.
  • the outer diameter of the large diameter part of the guide rollers 58 and 60 can be set arbitrarily, it can be set, for example, substantially the same as the outer diameter of the burnish rollers 14 and 16. Accordingly, the pair of guide rollers 58 and 60 can be reliably supported while avoiding contact with the crankshaft 100 and the first backup roller 22.
  • the burnishing rollers 14 and 16 are supported so that their outer peripheral surfaces can rotate without contacting the retainers 54 and 56. Therefore, since the outer peripheral surfaces of the burnish rollers 14 and 16 are prevented from coming into contact with the retainers 54 and 56 and damaged, high machining accuracy is maintained.
  • the pair of burnish rollers 14 and 16 includes the axis lines Ax1 and Ax2 of the shaft portion 102 of the crankshaft 100 and the axis line Ax3 of the first support shaft 28 (the rotation axis of the first backup roller 22). Are spaced apart from each other at equidistant positions d from the line segment L.
  • the roller burnishing apparatus 10 is basically configured as described above. Next, the operation and effect of the apparatus will be described.
  • the crankshaft 100 is mounted on a rotary drive device (not shown) and rotated.
  • the crankshaft 100 is rotated so that the axis Ax1 of the crank journal 104 becomes the rotation axis
  • the crankshaft 100 is rotated so that the axis Ax2 of the pin 106 becomes the rotation axis. It is assumed that the pair of burnish rollers 14 and 16 of the roller burnishing apparatus 10 are waiting in the vicinity of the shaft portion 102 of the crankshaft 100 that performs burnishing.
  • the roller burnishing apparatus 10 brings the pressing mechanism 18 close to the shaft portion 102 of the crankshaft 100 by a moving mechanism (not shown).
  • the burnish rollers 14 and 16 are brought into line contact with the outer peripheral surface of the shaft portion 102.
  • the pair of burnish rollers 14 and 16 are juxtaposed along the circumferential direction of the shaft portion 102 of the crankshaft 100, so that it is difficult to slide in the circumferential direction with respect to the outer peripheral surface of the shaft portion 102.
  • the pair of burnish rollers 14 and 16 stably makes line contact with the outer peripheral surface of the shaft portion 102 of the crankshaft 100.
  • the pressing force of the plurality of disc springs 36 is transmitted approximately equally to the pair of burnish rollers 14 and 16 via the first to third backup rollers 22, 24 and 26, so that each of the burnish rollers 14 and 16 has a predetermined value.
  • the outer peripheral surface of the shaft portion 102 is rolled while being pressed against the outer peripheral surface of the shaft portion 102 of the crankshaft 100 by a pressing force (Hertz surface pressure).
  • the pressing force of the disc spring 36 is transmitted to the burnishing rollers 14 and 16 by the first to third backup rollers 22, 24 and 26, so that the pressing mechanism 18 and the balance weight 110 do not interfere with each other. .
  • Each of the burnish rollers 14 and 16 is allowed to rotate by the first to third backup rollers 22, 24 and 26 and the pair of guide rollers 58 and 60, so that the outer peripheral surface of the shaft portion 102 of the crankshaft 100 is provided. It will roll smoothly. As a result, the outer peripheral surface of the shaft portion 102 of the crankshaft 100 is plastically deformed (burnished) and smoothed.
  • the pair of burnish rollers 14 and 16 arranged in parallel along the circumferential direction of the shaft portion 102 of the crankshaft 100 are in line contact with the outer peripheral surface of the shaft portion 102 of the crankshaft 100.
  • Each of the burnish rollers 14 and 16 can be made difficult to slide in the circumferential direction with respect to the outer peripheral surface of the shaft portion 102. Accordingly, a predetermined pressing force can be efficiently applied from the pressing mechanism 18 to the outer peripheral surface of the shaft portion 102 of the crankshaft 100 via the burnish rollers 14 and 16, so that the shaft portion 102 can be configured with a simple configuration. The processing efficiency can be improved.
  • the outer diameters of the burnish rollers 14 and 16 are made smaller than the outer diameter of the shaft portion 102 of the crankshaft 100, it is possible to efficiently apply a pressing force to the outer peripheral surface of the shaft portion 102. it can. Further, since the pressing force can be transmitted to the burnishing rollers 14 and 16 via the first backup roller 22, a predetermined pressing force is applied to each of the burnishing rollers 14 and 16 while allowing the rotation of the burnishing rollers 14 and 16. Pressure can be applied. Furthermore, since the first to third backup rollers 22, 24, and 26 are used, it is possible to avoid interference between the balance weight 110 and the pressing mechanism 18 while reducing the size of the pressing mechanism 18.
  • a pair of burnish rollers 14 and 16 having the same outer diameter are connected to the axis of the shaft portion 102 of the crankshaft 100 (the axis Ax1 of the crank journal 104 or the axis Ax2 of the crankpin 106) and the first support shaft 28.
  • the pair of guide rollers 58 and 60 arranged so as to sandwich the pair of burnish rollers 14 and 16 are rotated in contact with the outer peripheral surfaces of the burnish rollers 14 and 16. Therefore, it is possible to prevent the outer peripheral surfaces (rolling surfaces) of the burnish rollers 14 and 16 from coming into contact with the retainers 54 and 56 so that high machining accuracy can be maintained.
  • each burnish roller 14, 16 is set to 1/10 or more and 1/5 or less of the outer diameter of the shaft portion 102 of the crankshaft 100, the outer diameter of the shaft portion 102 is pushed. Pressure can be applied efficiently. Therefore, the processing efficiency of the outer peripheral surface of the shaft portion 102 of the crankshaft 100 can be further improved.
  • the present embodiment is not limited to the above-described configuration and burnishing method.
  • the crankshaft 100 is rotated so that the axis line Ax1 of the crank journal 104 becomes the rotation axis, and the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the crankpin 106.
  • the burnishing may be performed by rotating the pressing mechanism 18 around the axis of the crank journal 104 while rotating the pressing mechanism 18 around the axis of the crank journal 104.
  • the crankshaft 100 is rotated so that the axis Ax1 of the crank journal 104 becomes the rotation axis, and the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the crank journal 104.
  • the burnishing may be performed by rotating the pressing mechanism 18 around the axis of the crank journal 104 in the state where it is in this state.
  • crankshaft 100 is fixed without rotating, and the pressing mechanism 18 is arranged around the axis of the shaft portion 102 in a state where the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the shaft portion 102 of the crankshaft 100. Vanishing may be performed by rotating.
  • the roller burnishing apparatus 10 may have a support portion 20a according to a modification shown in FIG.
  • the burnish rollers 14 and 16 are pivotally supported with respect to the retainers 54 and 56, and the pair of guide rollers 58 and 60 are omitted. Even in such a configuration, an appropriate pressing force is applied to the outer peripheral surface of the shaft portion 102 of the crankshaft 100 while preventing the outer peripheral surfaces of the burnish rollers 14 and 16 from coming into contact with the retainers 54 and 56 and being damaged.
  • the burnish rollers 14 and 16 can be rolled.
  • the roller burnishing apparatus 10 may include a pair of receiving rollers 62 that support the shaft portion 102 of the crankshaft 100 from the side opposite to the burnish rollers 14 and 16.
  • the pressing force Hertz surface pressure
  • the processing efficiency of the axial part 102 of the crankshaft 100 can be improved further.
  • the roller burnishing apparatus 10 may include a large-diameter receiving roller 64 and a pair of small-diameter receiving rollers 66 that rotate in contact with the outer peripheral surface of the receiving roller 64. Good. In this case, interference between the balance weight 110 and the receiving rollers 64 and 66 can be preferably avoided.
  • the roller burnishing apparatus 10 may include a plurality (two in the illustrated example) of processing unit main bodies 12.
  • the plurality of processed portion main bodies 12 are disposed so as to face each other with the shaft portion 102 of the crankshaft 100 interposed therebetween. Thereby, the processing efficiency of the axial part 102 of the crankshaft 100 can further be improved.
  • roller burnishing apparatus is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

A roller burnishing device (10) is provided with a pair of burnishing rollers (14, 16) extending along the axial direction of a crank shaft (100), a pressing mechanism (18), and a support section (20). The pressing mechanism (18) has a first backup roller (22). Said burnishing rollers (14, 16) contact the shaft section (102) of the crank shaft (100) disposed side by side along the circumferential direction of said shaft section (102).

Description

ローラバニッシュ加工装置Roller burnish processing equipment
　本発明は、クランクシャフトの軸部の外周面をバニッシュ加工するローラバニッシュ加工装置に関する。 The present invention relates to a roller burnishing apparatus that burnishes the outer peripheral surface of a shaft portion of a crankshaft.
　バニッシュ加工は、例えば、金属製のワークの表面に加工ツール（ダイヤモンドチップ）を点接触させた状態で押し付けて相対移動させて行われるものであって、切屑を発生させることなく比較的短時間でワークの表面を円滑化することができるという利点がある。 Vanishing is performed by, for example, pressing a processing tool (diamond tip) on the surface of a metal workpiece in a point-contacted manner and moving it relatively, and in a relatively short time without generating chips. There is an advantage that the surface of the workpiece can be smoothed.
　しかしながら、この種のバニッシュ加工をクランクシャフトの軸部の外周面に適用する場合、当該外周面に開口する給油穴に加工ツールが落ち込んだり、加工ツールとバランスウエイトとが干渉したりすることがある。 However, when this type of burnishing is applied to the outer peripheral surface of the shaft portion of the crankshaft, the processing tool may drop into the oil supply hole opened in the outer peripheral surface, or the processing tool and the balance weight may interfere with each other. .
　例えば、特開平６－１９０７１８号公報及び特許第３６９０３９４号公報には、クランクシャフトの軸線方向に延在した１つのバニッシュローラをクランクシャフトの軸部の外周面に線接触させた状態で押し付けて転動させることにより給油穴へのバニッシュローラ（加工ツール）の落ち込みを抑えながらクランクシャフトの軸部の外周面をバニッシュ加工するローラバニッシュ加工装置が提案されている。 For example, in Japanese Patent Application Laid-Open No. 6-190718 and Japanese Patent No. 3690394, a single burnish roller extending in the axial direction of the crankshaft is pressed against the outer peripheral surface of the shaft portion of the crankshaft and rolled. There has been proposed a roller burnishing apparatus that burns the outer peripheral surface of the shaft portion of the crankshaft while suppressing the drop of the burnish roller (machining tool) into the oil supply hole by moving.
　また、この特開平６－１９０７１８号公報には、油圧シリンダの押圧力を１つのバックアップローラを介してバニッシュローラに伝達させることによりバランスウエイトの干渉を回避する技術的思想が開示されている。 Japanese Patent Laid-Open No. 6-190718 discloses a technical idea of avoiding balance weight interference by transmitting a pressing force of a hydraulic cylinder to a burnish roller via one backup roller.
　上述した従来技術では、図９に示すようにクランクシャフト２０２の軸部の外周面に対して１つのバニッシュローラ２００を線接触させた状態で押し付けるので、バニッシュローラ２００がクランクシャフト２０２の軸部の外周面に対して周方向に滑り易く、クランクシャフト２０２の軸部の外周面に押圧力を効率的に作用させることができないことがある。そのため、クランクシャフト２０２の軸部の外周面の加工効率が低下することがある。 In the prior art described above, as shown in FIG. 9, one burnish roller 200 is pressed against the outer peripheral surface of the shaft portion of the crankshaft 202 in a line-contact state, so that the burnish roller 200 is pressed against the shaft portion of the crankshaft 202. It may be slippery in the circumferential direction with respect to the outer peripheral surface, and the pressing force may not be efficiently applied to the outer peripheral surface of the shaft portion of the crankshaft 202. Therefore, the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft 202 may be reduced.
　本発明は、このような課題を考慮してなされたものであり、バランスウエイトの干渉を回避しつつ簡易な構成でクランクシャフトの軸部の外周面の加工効率を高めることができるローラバニッシュ加工装置を提供することを目的とする。 The present invention has been made in consideration of such problems, and a roller burnish processing apparatus capable of increasing the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft with a simple configuration while avoiding balance weight interference. The purpose is to provide.
　前記の目的を達成するために、本発明に係るローラバニッシュ加工装置は、クランクシャフトの軸部の外周面をバニッシュ加工するローラバニッシュ加工装置において、前記クランクシャフトの軸線方向に沿って延在して前記クランクシャフトの軸部の外径よりも小さい外径を有する一対のバニッシュローラと、一対の前記バニッシュローラを回転可能に支持する支持手段と、各前記バニッシュローラを前記クランクシャフトの軸部に向けて押圧する押圧機構と、を備え、前記押圧機構は、各前記バニッシュローラの外周面に接触して回転する第１バックアップローラを有し、一対の前記バニッシュローラは、前記クランクシャフトの軸部の周方向に沿って並設された状態で当該クランクシャフトの軸部の外周面に接触することを特徴とする。 In order to achieve the above object, a roller burnishing apparatus according to the present invention is a roller burnishing apparatus that burns the outer peripheral surface of a shaft portion of a crankshaft, and extends along the axial direction of the crankshaft. A pair of burnish rollers having an outer diameter smaller than the outer diameter of the shaft portion of the crankshaft, support means for rotatably supporting the pair of burnish rollers, and each vanish roller facing the shaft portion of the crankshaft A pressing mechanism that presses and presses, and the pressing mechanism has a first backup roller that rotates in contact with the outer peripheral surface of each of the burnish rollers, and the pair of burnish rollers are provided on the shaft portion of the crankshaft. Contact with the outer peripheral surface of the shaft portion of the crankshaft in a state of being arranged side by side along the circumferential direction. .
　このような構成によれば、クランクシャフトの軸部の周方向に沿って並設された一対のバニッシュローラをクランクシャフトの軸部の外周面に接触させているので、各バニッシュローラを前記軸部の外周面に対して周方向に滑り難くすることができる。これにより、押圧機構から各バニッシュローラを介してクランクシャフトの軸部の外周面に所定の押圧力を効率的に作用させることができるので、簡易な構成で前記軸部の加工効率を高めることができる。また、第１バックアップローラを介して各バニッシュローラに押圧力を伝達するので、バランスウエイトと押圧機構との干渉を回避することができる。 According to such a configuration, the pair of burnish rollers arranged side by side along the circumferential direction of the shaft portion of the crankshaft are brought into contact with the outer peripheral surface of the shaft portion of the crankshaft. It is possible to make it difficult to slip in the circumferential direction with respect to the outer peripheral surface of the. Accordingly, a predetermined pressing force can be efficiently applied from the pressing mechanism to the outer peripheral surface of the shaft portion of the crankshaft via each burnish roller, so that the processing efficiency of the shaft portion can be increased with a simple configuration. it can. In addition, since the pressing force is transmitted to each burnish roller via the first backup roller, interference between the balance weight and the pressing mechanism can be avoided.
　上記のローラバニッシュ加工装置において、一対の前記バニッシュローラは、同一の外径を有しており、前記クランクシャフトの軸部の軸線と前記第１バックアップローラの回転軸線とを結ぶ線分から等距離の位置に互いに離間して配設されていてもよい。 In the above roller burnishing apparatus, the pair of burnish rollers have the same outer diameter, and are equidistant from a line segment connecting the axis of the crankshaft shaft and the rotation axis of the first backup roller. The positions may be spaced apart from each other.
　このような構成によれば、第１バックアップローラを介して各バニッシュローラに対して略等しい押圧力を伝達することができると共に一対のバニッシュローラをクランクシャフトの軸部の外周面に対して周方向に一層滑り難くすることができる。 According to such a configuration, substantially the same pressing force can be transmitted to each burnish roller via the first backup roller, and the pair of burnish rollers are circumferentially arranged with respect to the outer peripheral surface of the shaft portion of the crankshaft. It is possible to make it more difficult to slip.
　上記のローラバニッシュ加工装置において、前記押圧機構は、前記第１バックアップローラの外周面に接触して回転する第２バックアップローラを有していてもよい。 In the roller burnishing apparatus, the pressing mechanism may include a second backup roller that rotates in contact with an outer peripheral surface of the first backup roller.
　このような構成によれば、第１バックアップローラ及び第２バックアップローラを用いているので、押圧機構の小型化を図りつつクランクシャフトのバランスウエイトと押圧機構との干渉を回避することができる。 According to such a configuration, since the first backup roller and the second backup roller are used, it is possible to avoid interference between the balance weight of the crankshaft and the pressing mechanism while reducing the size of the pressing mechanism.
　上記のローラバニッシュ加工装置において、前記支持手段は、一対の前記バニッシュローラを挟むようにして配設されて当該バニッシュローラの外周面に接触して回転する一対のガイドローラと、各前記ガイドローラを軸支するリテーナと、を有していてもよい。 In the above roller burnishing apparatus, the support means is disposed so as to sandwich the pair of burnish rollers, and rotates in contact with the outer peripheral surface of the burnish roller. And a retainer.
　このような構成によれば、バニッシュローラの外周面がリテーナに接触して傷つくことを抑えることができるので、高い加工精度を維持することができる。 According to such a configuration, the outer peripheral surface of the burnish roller can be prevented from coming into contact with the retainer and being damaged, so that high machining accuracy can be maintained.
　上記のローラバニッシュ加工装置において、各前記バニッシュローラの外径は、前記クランクシャフトの軸部の外径の１／１０以上１／５以下の大きさに設定されていてもよい。 In the above-described roller burnishing apparatus, the outer diameter of each of the burnish rollers may be set to 1/10 or more and 1/5 or less of the outer diameter of the shaft portion of the crankshaft.
　このような構成によれば、バニッシュローラの破損を抑えつつクランクシャフトの軸部の外周面に押圧力をより効率的に作用させることができる。 According to such a configuration, the pressing force can be more efficiently applied to the outer peripheral surface of the shaft portion of the crankshaft while suppressing breakage of the burnish roller.
　本発明によれば、クランクシャフトの軸部の周方向に沿って並設された一対のバニッシュローラをクランクシャフトの軸部の外周面に接触させると共に第１バックアップローラを介して各バニッシュローラに押圧力を伝達するので、バランスウエイトの干渉を回避しつつ簡易な構成でクランクシャフトの軸部の外周面の加工効率を高めることができる。 According to the present invention, a pair of burnish rollers arranged side by side along the circumferential direction of the shaft portion of the crankshaft is brought into contact with the outer peripheral surface of the shaft portion of the crankshaft, and is pressed against each burnish roller via the first backup roller. Since the pressure is transmitted, the processing efficiency of the outer peripheral surface of the shaft portion of the crankshaft can be increased with a simple configuration while avoiding the interference of the balance weight.
本発明の一実施形態に係るローラバニッシュ加工装置及びクランクシャフトの模式図である。It is a schematic diagram of a roller burnishing apparatus and a crankshaft according to an embodiment of the present invention. 図１のＩＩ－ＩＩ線に沿った縦断面図である。FIG. 2 is a longitudinal sectional view taken along line II-II in FIG. 図２のＩＩＩ－ＩＩＩ線に沿った縦断面図である。FIG. 3 is a longitudinal sectional view taken along line III-III in FIG. 2. 図２に示す支持部の平面図である。It is a top view of the support part shown in FIG. 一対のバニッシュローラの位置関係を示す説明図である。It is explanatory drawing which shows the positional relationship of a pair of burnish roller. 変形例に係る支持部の平面図である。It is a top view of the support part concerning a modification. 図７Ａは２つの受けローラを備えた変形例に係るローラバニッシュ加工装置の説明図であり、図７Ｂは３つの受けローラを備えた変形例に係るローラバニッシュ加工装置の説明図である。FIG. 7A is an explanatory view of a roller burnishing apparatus according to a modified example including two receiving rollers, and FIG. 7B is an explanatory view of a roller burnishing apparatus according to a modified example including three receiving rollers. ２つの加工部本体を備えた変形例に係るローラバニッシュ加工装置の説明図である。It is explanatory drawing of the roller burnishing apparatus which concerns on the modification provided with two process part main bodies. 従来技術に係るバニッシュ加工の説明図である。It is explanatory drawing of the burnishing which concerns on a prior art.
　以下、本発明に係るローラバニッシュ加工装置について好適な実施形態を挙げ、添付の図面を参照しながら説明する。 Hereinafter, preferred embodiments of the roller burnishing apparatus according to the present invention will be described with reference to the accompanying drawings.
　図１に示すように、本実施形態に係るローラバニッシュ加工装置１０は、クランクシャフト１００の軸部１０２（クランクジャーナル１０４及びクランクピン１０６）をバニッシュ加工（バニッシング加工）するものである。 As shown in FIG. 1, a roller burnishing apparatus 10 according to the present embodiment burns (shakes) a shaft portion 102 (crank journal 104 and crank pin 106) of a crankshaft 100.
　先ず、ワークとしてのクランクシャフト１００について説明する。クランクシャフト１００は、例えば、自動車等のエンジンの構成部品として用いられ、図示しないシリンダブロックに軸支される複数のクランクジャーナル１０４と、図示しないピストンのコンロッドが装着される複数のクランクピン１０６と、クランクジャーナル１０４及びクランクピン１０６を連結する複数のクランクアーム１０８と、クランクアーム１０８に設けられた複数のバランスウエイト１１０とを有している。 First, the crankshaft 100 as a workpiece will be described. The crankshaft 100 is used as a component part of an engine such as an automobile, for example, and a plurality of crank journals 104 pivotally supported by a cylinder block (not shown), a plurality of crankpins 106 to which a connecting rod of a piston (not shown) is attached, A plurality of crank arms 108 for connecting the crank journal 104 and the crank pin 106 and a plurality of balance weights 110 provided on the crank arm 108 are provided.
　クランクジャーナル１０４の軸線Ａｘ１とクランクピン１０６の軸線Ａｘ２とは、互いに重ならない位置で平行に延在している。図３に示すように、クランクジャーナル１０４とクランクアーム１０８との間（境界部）及びクランクピン１０６とクランクアーム１０８との間（境界部）には、円弧状に窪んだフィレット部１１２が形成されている。なお、クランクジャーナル１０４及びクランクピン１０６の外周面には、給油穴１１４が開口している。 The axis Ax1 of the crank journal 104 and the axis Ax2 of the crank pin 106 extend in parallel at positions that do not overlap each other. As shown in FIG. 3, an arcuate fillet portion 112 is formed between the crank journal 104 and the crank arm 108 (boundary portion) and between the crank pin 106 and the crank arm 108 (boundary portion). ing. An oil supply hole 114 is opened on the outer peripheral surfaces of the crank journal 104 and the crankpin 106.
　図１～図３に示すように、ローラバニッシュ加工装置１０は、図示しない移動機構に取り付けられた加工部本体１２を備えている。加工部本体１２は、円柱状又は円筒状に構成された一対のバニッシュローラ１４、１６と、これらバニッシュローラ１４、１６をクランクシャフト１００の軸部１０２に向けて押圧する押圧機構１８と、バニッシュローラ１４、１６を支持する支持部（支持手段）２０とを有している。 As shown in FIGS. 1 to 3, the roller burnishing apparatus 10 includes a processing unit main body 12 attached to a moving mechanism (not shown). The processing unit main body 12 includes a pair of burnish rollers 14 and 16 configured in a columnar shape or a cylindrical shape, a pressing mechanism 18 that presses the burnish rollers 14 and 16 toward the shaft portion 102 of the crankshaft 100, and a burnish roller. And a support portion (support means) 20 for supporting the members 14 and 16.
　一対のバニッシュローラ１４、１６は、クランクシャフト１００の軸線方向（矢印Ｘ方向）に沿って延在した状態でクランクシャフト１００の軸部１０２の周方向に沿って並設されている。各バニッシュローラ１４、１６の全長は、クランクシャフト１００におけるバニッシュ加工を行う軸部１０２の幅寸法よりも僅かに長く設定されている。これにより、クランクシャフト１００の軸部１０２の外周面を効率的にバニッシュ加工することができる。 The pair of burnish rollers 14 and 16 are juxtaposed along the circumferential direction of the shaft portion 102 of the crankshaft 100 in a state of extending along the axial direction (arrow X direction) of the crankshaft 100. The overall lengths of the burnishing rollers 14 and 16 are set slightly longer than the width of the shaft portion 102 that performs burnishing on the crankshaft 100. Thereby, the outer peripheral surface of the axial part 102 of the crankshaft 100 can be burnished efficiently.
　一対のバニッシュローラ１４、１６は、同一の外径を有している。各バニッシュローラ１４、１６の外径は、クランクシャフト１００におけるバニッシュ加工が行われる軸部１０２の外径よりも小さく設定されている。具体的には、各バニッシュローラ１４、１６の外径は、当該軸部１０２の外径の１／１０以上１／５以下の大きさに設定されているのが好ましい。 The pair of burnish rollers 14 and 16 have the same outer diameter. The outer diameters of the burnish rollers 14 and 16 are set to be smaller than the outer diameter of the shaft portion 102 where the burnishing process is performed on the crankshaft 100. Specifically, the outer diameter of each of the burnish rollers 14 and 16 is preferably set to a size of 1/10 or more and 1/5 or less of the outer diameter of the shaft portion 102.
　バニッシュローラ１４、１６の外径が当該軸部１０２の外径の１／１０よりも小さいとバニッシュローラ１４、１６が破損し易くなり、バニッシュローラ１４、１６の外径が当該軸部１０２の外径の１／５よりも大きいと当該軸部１０２の外周面に押圧力を効率的に高めることができないからである。 If the outer diameter of the burnish rollers 14 and 16 is smaller than 1/10 of the outer diameter of the shaft portion 102, the burnish rollers 14 and 16 are easily damaged, and the outer diameter of the burnish rollers 14 and 16 is smaller than the outer diameter of the shaft portion 102. This is because if the diameter is larger than 1/5 of the diameter, the pressing force cannot be efficiently increased on the outer peripheral surface of the shaft portion 102.
　押圧機構１８は、一対のバニッシュローラ１４、１６の回転に伴って回転する第１～第３バックアップローラ２２、２４、２６と、第１～第３バックアップローラ２２、２４、２６を軸支する第１～第３支持軸２８、３０、３２と、第１～第３支持軸２８、３０、３２を保持するホルダ３４と、ホルダ３４を押圧する複数の皿ばね（付勢手段）３６と、複数の皿ばね３６を支持するばね支持部３８とを有している。 The pressing mechanism 18 includes first to third backup rollers 22, 24, 26 that rotate as the pair of burnish rollers 14, 16 rotate, and first to third backup rollers 22, 24, 26 that pivotally support the first to third backup rollers 22, 24, 26. 1st to 3rd support shafts 28, 30, 32, a holder 34 for holding the 1st to 3rd support shafts 28, 30, 32, a plurality of disc springs (biasing means) 36 for pressing the holder 34, and a plurality of And a spring support portion 38 for supporting the disc spring 36.
　第１バックアップローラ２２は、第１支持軸２８により軸支された状態で一対のバニッシュローラ１４、１６の外周面に接触している。第２バックアップローラ２４は、第２支持軸３０により軸支された状態で第１バックアップローラ２２の外周面に接触している。第３バックアップローラ２６は、第３支持軸３２により軸支された状態で第２バックアップローラ２４に接触している。 The first backup roller 22 is in contact with the outer peripheral surfaces of the pair of burnish rollers 14 and 16 while being supported by the first support shaft 28. The second backup roller 24 is in contact with the outer peripheral surface of the first backup roller 22 while being supported by the second support shaft 30. The third backup roller 26 is in contact with the second backup roller 24 while being supported by the third support shaft 32.
　第１～第３支持軸２８、３０、３２は、クランクシャフト１００の軸線方向に沿って延在している。換言すれば、第１～第３支持軸２８、３０、３２の軸線Ａｘ３、Ａｘ４、Ａｘ５は、クランクシャフト１００の軸部１０２の軸線Ａｘ１、Ａｘ２に対して平行に延在している。 The first to third support shafts 28, 30, and 32 extend along the axial direction of the crankshaft 100. In other words, the axis lines Ax3, Ax4, Ax5 of the first to third support shafts 28, 30, 32 extend in parallel to the axis lines Ax1, Ax2 of the shaft portion 102 of the crankshaft 100.
　ホルダ３４は、第１～第３バックアップローラ２２、２４、２６をクランクシャフト１００の軸線方向から挟むようにして配設された一対のカバー部４０、４２と、これらカバー部４０、４２を締結する複数のボルト４４と、各カバー部４０、４２におけるバニッシュローラ１４、１６が位置する側とは反対側の端部に設けられてこれらカバー部４０、４２を連結する連結部４６とを含む。 The holder 34 includes a pair of cover portions 40, 42 disposed so as to sandwich the first to third backup rollers 22, 24, 26 from the axial direction of the crankshaft 100, and a plurality of fastening portions for fastening the cover portions 40, 42. It includes a bolt 44 and a connecting portion 46 that is provided at an end of each cover portion 40, 42 opposite to the side where the burnish rollers 14, 16 are located and connects the cover portions 40, 42.
　各カバー部４０、４２は、バニッシュローラ１４、１６に近い先端側が薄肉に形成され、連結部４６に近い基端側が厚肉に形成されている。具体的には、各カバー部４０、４２は、第１バックアップローラ２２及び第２バックアップローラ２４を覆う部位が薄肉に形成され、第３バックアップローラ２６を覆う部分が厚肉に形成されている。これにより、押圧機構１８の先端側の厚み寸法を比較的小さくすることができるので、押圧機構１８とバランスウエイト１１０との干渉を回避することができる。 Each of the cover portions 40 and 42 has a thin tip at the tip side close to the burnish rollers 14 and 16 and a thick base at the base end near the connecting portion 46. Specifically, the cover portions 40 and 42 each have a thin portion covering the first backup roller 22 and the second backup roller 24 and a thick portion covering the third backup roller 26. Thereby, since the thickness dimension of the front end side of the press mechanism 18 can be made comparatively small, interference with the press mechanism 18 and the balance weight 110 can be avoided.
　皿ばね３６の枚数及び大きさ等は、クランクシャフト１００の軸部１０２の外周面に要求される表面粗さに応じて設定される。本実施形態では、押圧機構１８の小型化を図るためにホルダ３４を押圧する付勢手段として複数の皿ばね３６を用いているが、付勢手段は、コイルばね等を用いても構わない。ばね支持部３８は、複数の皿ばね３６が配設される配設穴４８が形成されたブロック状の部材であって、配設穴４８を構成する穴底面に設けられて各皿ばね３６の中心孔に挿通する支柱５０を有する。 The number and size of the disc springs 36 are set according to the surface roughness required for the outer peripheral surface of the shaft portion 102 of the crankshaft 100. In the present embodiment, a plurality of disc springs 36 are used as urging means for pressing the holder 34 in order to reduce the size of the pressing mechanism 18, but the urging means may be a coil spring or the like. The spring support portion 38 is a block-like member in which an arrangement hole 48 in which a plurality of disc springs 36 are arranged is formed. The spring support portion 38 is provided on the bottom surface of the arrangement hole 48 and is arranged on each of the disc springs 36. It has the support | pillar 50 penetrated to a center hole.
　図４に示すように、支持部２０は、複数のボルト５２によりカバー部４０、４２に取り付けられた一対のリテーナ５４、５６と、各リテーナ５４、５６に軸支された一対のガイドローラ５８、６０とを有している。 As shown in FIG. 4, the support portion 20 includes a pair of retainers 54 and 56 attached to the cover portions 40 and 42 by a plurality of bolts 52, and a pair of guide rollers 58 pivotally supported by the retainers 54 and 56. 60.
　各リテーナ５４、５６は、平面視で略Ｕ字状に形成されており、そのＵ字の内部空間にバニッシュローラ１４、１６及びガイドローラ５８、６０が配設されている。一対のリテーナ５４、５６は、Ｕ字の開口が互いに対向するようにバニッシュローラ１４、１６の軸線方向と直交する方向に互いに所定距離だけ離間して並設されている。一対のリテーナ５４、５６の離間間隔は、任意に設定可能であるが、例えば、バニッシュローラ１４、１６の外径よりも小さく設定されている。 The retainers 54 and 56 are formed in a substantially U shape in plan view, and the burnish rollers 14 and 16 and the guide rollers 58 and 60 are arranged in the internal space of the U shape. The pair of retainers 54 and 56 are arranged in parallel at a predetermined distance from each other in a direction orthogonal to the axial direction of the burnish rollers 14 and 16 so that the U-shaped openings face each other. The spacing between the pair of retainers 54 and 56 can be set arbitrarily, but is set smaller than the outer diameter of the burnish rollers 14 and 16, for example.
　一対のガイドローラ５８、６０は、一対のバニッシュローラ１４、１６を挟むようにして配設されている。各ガイドローラ５８、６０は、バニッシュローラ１４、１６の軸線方向に沿って延在しており、その両端部が小径に形成されると共に中央部が大径に形成されている。 The pair of guide rollers 58 and 60 are disposed so as to sandwich the pair of burnish rollers 14 and 16. Each of the guide rollers 58 and 60 extends along the axial direction of the burnish rollers 14 and 16, and both end portions thereof are formed with a small diameter and the central portion thereof is formed with a large diameter.
　これにより、図４からも諒解されるように、ガイドローラ５８、６０の大径部の外周面がバニッシュローラ１４、１６の外周面に接触して回転することとなる。ガイドローラ５８、６０の大径部の外径は、任意に設定可能であるが、例えば、バニッシュローラ１４、１６の外径と略同一に設定することができる。これにより、一対のガイドローラ５８、６０がクランクシャフト１００及び第１バックアップローラ２２に接触することを回避しつつ確実に支持することができる。 As a result, as can be understood from FIG. 4, the outer peripheral surfaces of the large diameter portions of the guide rollers 58 and 60 are rotated in contact with the outer peripheral surfaces of the burnish rollers 14 and 16. Although the outer diameter of the large diameter part of the guide rollers 58 and 60 can be set arbitrarily, it can be set, for example, substantially the same as the outer diameter of the burnish rollers 14 and 16. Accordingly, the pair of guide rollers 58 and 60 can be reliably supported while avoiding contact with the crankshaft 100 and the first backup roller 22.
　このように構成された支持部２０では、各バニッシュローラ１４、１６は、その外周面がリテーナ５４、５６に接触することなく回転可能に支持される。そのため、バニッシュローラ１４、１６の外周面がリテーナ５４、５６に接触して傷つくことが抑えられるので高い加工精度が維持される。 In the support unit 20 configured as described above, the burnishing rollers 14 and 16 are supported so that their outer peripheral surfaces can rotate without contacting the retainers 54 and 56. Therefore, since the outer peripheral surfaces of the burnish rollers 14 and 16 are prevented from coming into contact with the retainers 54 and 56 and damaged, high machining accuracy is maintained.
　また、図５に示すように、一対のバニッシュローラ１４、１６は、クランクシャフト１００の軸部１０２の軸線Ａｘ１、Ａｘ２と第１支持軸２８の軸線Ａｘ３（第１バックアップローラ２２の回転軸線）とを結ぶ線分Ｌから等距離ｄの位置に互いに離間して配設されている。 Further, as shown in FIG. 5, the pair of burnish rollers 14 and 16 includes the axis lines Ax1 and Ax2 of the shaft portion 102 of the crankshaft 100 and the axis line Ax3 of the first support shaft 28 (the rotation axis of the first backup roller 22). Are spaced apart from each other at equidistant positions d from the line segment L.
　本実施形態に係るローラバニッシュ加工装置１０は、基本的には以上のように構成されるものであり、次にその動作及び作用効果について説明する。 The roller burnishing apparatus 10 according to the present embodiment is basically configured as described above. Next, the operation and effect of the apparatus will be described.
　先ず、クランクシャフト１００の軸部１０２の外周面をバニッシュ加工する際、例えば、クランクシャフト１００を図示しない回転駆動装置に装着して回転させる。このとき、クランクジャーナル１０４の外周面をバニッシュ加工する場合にはクランクジャーナル１０４の軸線Ａｘ１が回転軸線となるようにクランクシャフト１００を回転させ、クランクピン１０６の外周面をバニッシュ加工する場合にはクランクピン１０６の軸線Ａｘ２が回転軸線となるようにクランクシャフト１００を回転させる。なお、ローラバニッシュ加工装置１０の一対のバニッシュローラ１４、１６は、バニッシュ加工を行うクランクシャフト１００の軸部１０２の近傍に待機しているものとする。 First, when the outer peripheral surface of the shaft portion 102 of the crankshaft 100 is burnished, for example, the crankshaft 100 is mounted on a rotary drive device (not shown) and rotated. At this time, when the outer peripheral surface of the crank journal 104 is burnished, the crankshaft 100 is rotated so that the axis Ax1 of the crank journal 104 becomes the rotation axis, and when the outer peripheral surface of the crankpin 106 is burnished, The crankshaft 100 is rotated so that the axis Ax2 of the pin 106 becomes the rotation axis. It is assumed that the pair of burnish rollers 14 and 16 of the roller burnishing apparatus 10 are waiting in the vicinity of the shaft portion 102 of the crankshaft 100 that performs burnishing.
　続いて、クランクシャフト１００の軸部１０２の回転速度が所定の回転速度に達すると、ローラバニッシュ加工装置１０は、図示しない移動機構により押圧機構１８をクランクシャフト１００の軸部１０２に近づけて一対のバニッシュローラ１４、１６を当該軸部１０２の外周面に線接触させる。このとき、一対のバニッシュローラ１４、１６は、クランクシャフト１００の軸部１０２の周方向に沿って並設されているので当該軸部１０２の外周面に対して周方向に滑り難くなっている。換言すれば、一対のバニッシュローラ１４、１６は、クランクシャフト１００の軸部１０２の外周面に安定して線接触する。 Subsequently, when the rotational speed of the shaft portion 102 of the crankshaft 100 reaches a predetermined rotational speed, the roller burnishing apparatus 10 brings the pressing mechanism 18 close to the shaft portion 102 of the crankshaft 100 by a moving mechanism (not shown). The burnish rollers 14 and 16 are brought into line contact with the outer peripheral surface of the shaft portion 102. At this time, the pair of burnish rollers 14 and 16 are juxtaposed along the circumferential direction of the shaft portion 102 of the crankshaft 100, so that it is difficult to slide in the circumferential direction with respect to the outer peripheral surface of the shaft portion 102. In other words, the pair of burnish rollers 14 and 16 stably makes line contact with the outer peripheral surface of the shaft portion 102 of the crankshaft 100.
　また、複数の皿ばね３６の押圧力が第１～第３バックアップローラ２２、２４、２６を介して一対のバニッシュローラ１４、１６に略等しく伝達されるので、各バニッシュローラ１４、１６が所定の押圧力（ヘルツ面圧）でクランクシャフト１００の軸部１０２の外周面に押し付けられた状態で当該軸部１０２の外周面を転動する。このとき、皿ばね３６の押圧力を第１～第３バックアップローラ２２、２４、２６により各バニッシュローラ１４、１６に伝達しているので、押圧機構１８とバランスウエイト１１０とが干渉することはない。 Further, the pressing force of the plurality of disc springs 36 is transmitted approximately equally to the pair of burnish rollers 14 and 16 via the first to third backup rollers 22, 24 and 26, so that each of the burnish rollers 14 and 16 has a predetermined value. The outer peripheral surface of the shaft portion 102 is rolled while being pressed against the outer peripheral surface of the shaft portion 102 of the crankshaft 100 by a pressing force (Hertz surface pressure). At this time, the pressing force of the disc spring 36 is transmitted to the burnishing rollers 14 and 16 by the first to third backup rollers 22, 24 and 26, so that the pressing mechanism 18 and the balance weight 110 do not interfere with each other. .
　なお、各バニッシュローラ１４、１６は、第１～第３バックアップローラ２２、２４、２６及び一対のガイドローラ５８、６０によって回転が許容されているので、クランクシャフト１００の軸部１０２の外周面を円滑に転動することとなる。これにより、クランクシャフト１００の軸部１０２の外周面が塑性変形されて（バニッシュ加工されて）平滑化される。 Each of the burnish rollers 14 and 16 is allowed to rotate by the first to third backup rollers 22, 24 and 26 and the pair of guide rollers 58 and 60, so that the outer peripheral surface of the shaft portion 102 of the crankshaft 100 is provided. It will roll smoothly. As a result, the outer peripheral surface of the shaft portion 102 of the crankshaft 100 is plastically deformed (burnished) and smoothed.
　本実施形態によれば、クランクシャフト１００の軸部１０２の周方向に沿って並設された一対のバニッシュローラ１４、１６をクランクシャフト１００の軸部１０２の外周面に線接触させているので、各バニッシュローラ１４、１６を当該軸部１０２の外周面に対して周方向に滑り難くすることができる。これにより、押圧機構１８から各バニッシュローラ１４、１６を介してクランクシャフト１００の軸部１０２の外周面に所定の押圧力を効率的に作用させることができるので、簡易な構成で当該軸部１０２の加工効率を向上させることができる。 According to the present embodiment, the pair of burnish rollers 14 and 16 arranged in parallel along the circumferential direction of the shaft portion 102 of the crankshaft 100 are in line contact with the outer peripheral surface of the shaft portion 102 of the crankshaft 100. Each of the burnish rollers 14 and 16 can be made difficult to slide in the circumferential direction with respect to the outer peripheral surface of the shaft portion 102. Accordingly, a predetermined pressing force can be efficiently applied from the pressing mechanism 18 to the outer peripheral surface of the shaft portion 102 of the crankshaft 100 via the burnish rollers 14 and 16, so that the shaft portion 102 can be configured with a simple configuration. The processing efficiency can be improved.
　また、各バニッシュローラ１４、１６の外径をクランクシャフト１００の軸部１０２の外径よりも小さくしているので、当該軸部１０２の外周面に対して押圧力を効率的に作用させることができる。さらに、第１バックアップローラ２２を介して各バニッシュローラ１４、１６に押圧力を伝達することができるので、各バニッシュローラ１４、１６の回転を許容した状態で各バニッシュローラ１４、１６に所定の押圧力を作用させることができる。さらにまた、第１～第３バックアップローラ２２、２４、２６を用いているので押圧機構１８の小型化を図りつつバランスウエイト１１０と押圧機構１８との干渉を回避することができる。 Further, since the outer diameters of the burnish rollers 14 and 16 are made smaller than the outer diameter of the shaft portion 102 of the crankshaft 100, it is possible to efficiently apply a pressing force to the outer peripheral surface of the shaft portion 102. it can. Further, since the pressing force can be transmitted to the burnishing rollers 14 and 16 via the first backup roller 22, a predetermined pressing force is applied to each of the burnishing rollers 14 and 16 while allowing the rotation of the burnishing rollers 14 and 16. Pressure can be applied. Furthermore, since the first to third backup rollers 22, 24, and 26 are used, it is possible to avoid interference between the balance weight 110 and the pressing mechanism 18 while reducing the size of the pressing mechanism 18.
　本実施形態では、同一の外径を有する一対のバニッシュローラ１４、１６を、クランクシャフト１００の軸部１０２の軸線（クランクジャーナル１０４の軸線Ａｘ１又はクランクピン１０６の軸線Ａｘ２）と第１支持軸２８の軸線Ａｘ３（第１バックアップローラ２２の回転軸線）とを結ぶ線分Ｌから等距離ｄの位置に互いに離間して配設している。そのため、第１～第３バックアップローラ２２、２４、２６を介して各バニッシュローラ１４、１６に対して略等しい押圧力を伝達することができると共に一対のバニッシュローラ１４、１６をクランクシャフト１００の軸部１０２の外周面に対して周方向に一層滑り難くすることができる。 In this embodiment, a pair of burnish rollers 14 and 16 having the same outer diameter are connected to the axis of the shaft portion 102 of the crankshaft 100 (the axis Ax1 of the crank journal 104 or the axis Ax2 of the crankpin 106) and the first support shaft 28. Are spaced apart from each other at a position equidistant from a line segment L connecting the axis Ax3 (the rotation axis of the first backup roller 22). Therefore, substantially equal pressing force can be transmitted to the burnishing rollers 14 and 16 via the first to third backup rollers 22, 24 and 26, and the pair of burnishing rollers 14 and 16 are connected to the shaft of the crankshaft 100. It is possible to make it more difficult to slide in the circumferential direction with respect to the outer peripheral surface of the portion 102.
　本実施形態によれば、一対のバニッシュローラ１４、１６を挟むようにして配設された一対のガイドローラ５８、６０がバニッシュローラ１４、１６の外周面に接触して回転する。そのため、バニッシュローラ１４、１６の外周面（転圧面）がリテーナ５４、５６に接触して傷つくことを抑えることができるので高い加工精度を維持することができる。 According to the present embodiment, the pair of guide rollers 58 and 60 arranged so as to sandwich the pair of burnish rollers 14 and 16 are rotated in contact with the outer peripheral surfaces of the burnish rollers 14 and 16. Therefore, it is possible to prevent the outer peripheral surfaces (rolling surfaces) of the burnish rollers 14 and 16 from coming into contact with the retainers 54 and 56 so that high machining accuracy can be maintained.
　また、各バニッシュローラ１４、１６の外径をクランクシャフト１００の軸部１０２の外径の１／１０以上１／５以下の大きさに設定しているので、当該軸部１０２の外周面に押圧力を効率的に作用させることができる。よって、クランクシャフト１００の軸部１０２の外周面の加工効率を一層向上させることができる。 In addition, since the outer diameter of each burnish roller 14, 16 is set to 1/10 or more and 1/5 or less of the outer diameter of the shaft portion 102 of the crankshaft 100, the outer diameter of the shaft portion 102 is pushed. Pressure can be applied efficiently. Therefore, the processing efficiency of the outer peripheral surface of the shaft portion 102 of the crankshaft 100 can be further improved.
　本実施形態は、上述した構成及びバニッシュ加工方法に限定されない。例えば、クランクピン１０６の外周面をバニッシュ加工する場合、クランクジャーナル１０４の軸線Ａｘ１が回転軸線となるようにクランクシャフト１００を回転させ、クランクピン１０６の外周面に一対のバニッシュローラ１４、１６を押し付けた状態で押圧機構１８をクランクジャーナル１０４の軸線回りに回転させながらクランクピン１０６の軸線回りに回転させることによりバニッシュ加工を行ってもよい。 The present embodiment is not limited to the above-described configuration and burnishing method. For example, when the outer peripheral surface of the crankpin 106 is burnished, the crankshaft 100 is rotated so that the axis line Ax1 of the crank journal 104 becomes the rotation axis, and the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the crankpin 106. The burnishing may be performed by rotating the pressing mechanism 18 around the axis of the crank journal 104 while rotating the pressing mechanism 18 around the axis of the crank journal 104.
　また、クランクジャーナル１０４の外周面をバニッシュ加工する場合、クランクジャーナル１０４の軸線Ａｘ１が回転軸線となるようにクランクシャフト１００を回転させ、クランクジャーナル１０４の外周面に一対のバニッシュローラ１４、１６を押し付けた状態で押圧機構１８をクランクジャーナル１０４の軸線回りに回転させることによりバニッシュ加工を行ってもよい。 When the outer peripheral surface of the crank journal 104 is burnished, the crankshaft 100 is rotated so that the axis Ax1 of the crank journal 104 becomes the rotation axis, and the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the crank journal 104. The burnishing may be performed by rotating the pressing mechanism 18 around the axis of the crank journal 104 in the state where it is in this state.
　さらに、例えば、クランクシャフト１００を回転させることなく固定し、クランクシャフト１００の軸部１０２の外周面に一対のバニッシュローラ１４、１６を押し付けた状態で当該軸部１０２の軸線回りに押圧機構１８を回転させることによりバニッシュ加工を行ってもよい。 Further, for example, the crankshaft 100 is fixed without rotating, and the pressing mechanism 18 is arranged around the axis of the shaft portion 102 in a state where the pair of burnish rollers 14 and 16 are pressed against the outer peripheral surface of the shaft portion 102 of the crankshaft 100. Vanishing may be performed by rotating.
　本実施形態に係るローラバニッシュ加工装置１０は、図６に示す変形例に係る支持部２０ａを有していてもよい。この支持部２０ａでは、各バニッシュローラ１４、１６が各リテーナ５４、５６に対して軸支されると共に一対のガイドローラ５８、６０が省略されている。このような構成であっても各バニッシュローラ１４、１６の外周面がリテーナ５４、５６に接触して傷つくことを抑えつつクランクシャフト１００の軸部１０２の外周面に適度な押圧力を作用させながらバニッシュローラ１４、１６を転動させることができる。 The roller burnishing apparatus 10 according to the present embodiment may have a support portion 20a according to a modification shown in FIG. In the support portion 20a, the burnish rollers 14 and 16 are pivotally supported with respect to the retainers 54 and 56, and the pair of guide rollers 58 and 60 are omitted. Even in such a configuration, an appropriate pressing force is applied to the outer peripheral surface of the shaft portion 102 of the crankshaft 100 while preventing the outer peripheral surfaces of the burnish rollers 14 and 16 from coming into contact with the retainers 54 and 56 and being damaged. The burnish rollers 14 and 16 can be rolled.
　また、図７Ａに示すように、ローラバニッシュ加工装置１０は、クランクシャフト１００の軸部１０２をバニッシュローラ１４、１６とは反対側から支持する一対の受けローラ６２を有していてもよい。これにより、クランクシャフト１００の軸部１０２の撓みを抑えることができるので、当該軸部１０２の外周面に対する押圧力（ヘルツ面圧）を高めることができる。これにより、クランクシャフト１００の軸部１０２の加工効率を一層高めることができる。 7A, the roller burnishing apparatus 10 may include a pair of receiving rollers 62 that support the shaft portion 102 of the crankshaft 100 from the side opposite to the burnish rollers 14 and 16. Thereby, since the bending of the axial part 102 of the crankshaft 100 can be suppressed, the pressing force (Hertz surface pressure) with respect to the outer peripheral surface of the said axial part 102 can be raised. Thereby, the processing efficiency of the axial part 102 of the crankshaft 100 can be improved further.
　なお、受けローラ６２の数及び大きさは任意に設定することが可能である。例えば、図７Ｂに示すように、ローラバニッシュ加工装置１０は、大径の受けローラ６４と、受けローラ６４の外周面に接触して回転する小径の一対の受けローラ６６とを有していてもよい。この場合、バランスウエイト１１０と受けローラ６４、６６との干渉を好適に回避することができる。 Note that the number and size of the receiving rollers 62 can be arbitrarily set. For example, as illustrated in FIG. 7B, the roller burnishing apparatus 10 may include a large-diameter receiving roller 64 and a pair of small-diameter receiving rollers 66 that rotate in contact with the outer peripheral surface of the receiving roller 64. Good. In this case, interference between the balance weight 110 and the receiving rollers 64 and 66 can be preferably avoided.
　さらに、図８に示すように、ローラバニッシュ加工装置１０は、複数（図示例では２つ）の加工部本体１２を備えていてもよい。この場合、複数の加工部本体１２は、クランクシャフト１００の軸部１０２を挟んで互いに対向するように配設される。これにより、クランクシャフト１００の軸部１０２の加工効率をさらに高めることができる。 Further, as shown in FIG. 8, the roller burnishing apparatus 10 may include a plurality (two in the illustrated example) of processing unit main bodies 12. In this case, the plurality of processed portion main bodies 12 are disposed so as to face each other with the shaft portion 102 of the crankshaft 100 interposed therebetween. Thereby, the processing efficiency of the axial part 102 of the crankshaft 100 can further be improved.
　本発明に係るローラバニッシュ加工装置は、上述の実施形態に限らず、本発明の要旨を逸脱することなく、種々の構成を採り得ることはもちろんである。 Of course, the roller burnishing apparatus according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

Claims (5)

  1. 　クランクシャフト（１００）の軸部（１０２）の外周面をバニッシュ加工するローラバニッシュ加工装置（１０）において、
    　前記クランクシャフト（１００）の軸線方向に沿って延在して前記クランクシャフト（１００）の軸部（１０２）の外径よりも小さい外径を有する一対のバニッシュローラ（１４、１６）と、
    　一対の前記バニッシュローラ（１４、１６）を回転可能に支持する支持手段（２０、２０ａ）と、
    　各前記バニッシュローラ（１４、１６）を前記クランクシャフト（１００）の軸部（１０２）に向けて押圧する押圧機構（１８）と、を備え、
    　前記押圧機構（１８）は、各前記バニッシュローラ（１４、１６）の外周面に接触して回転する第１バックアップローラ（２２）を有し、
    　一対の前記バニッシュローラ（１４、１６）は、前記クランクシャフト（１００）の軸部（１０２）の周方向に沿って並設された状態で当該クランクシャフト（１００）の軸部（１０２）の外周面に接触することを特徴とするローラバニッシュ加工装置（１０）。     In the roller burnishing device (10) for burnishing the outer peripheral surface of the shaft (102) of the crankshaft (100),
    A pair of burnish rollers (14, 16) extending along the axial direction of the crankshaft (100) and having an outer diameter smaller than the outer diameter of the shaft (102) of the crankshaft (100);
    Support means (20, 20a) for rotatably supporting the pair of burnish rollers (14, 16);
    A pressing mechanism (18) for pressing each of the burnish rollers (14, 16) toward the shaft (102) of the crankshaft (100),
    The pressing mechanism (18) has a first backup roller (22) that rotates in contact with the outer peripheral surface of each of the burnish rollers (14, 16),
    The pair of burnish rollers (14, 16) are arranged along the circumferential direction of the shaft portion (102) of the crankshaft (100), and the outer periphery of the shaft portion (102) of the crankshaft (100). A roller burnishing apparatus (10) characterized by contacting a surface.
  2. 　請求項１記載のローラバニッシュ加工装置（１０）において、
    　一対の前記バニッシュローラ（１４、１６）は、同一の外径を有しており、前記クランクシャフト（１００）の軸部（１０２）の軸線と前記第１バックアップローラ（２２）の回転軸線とを結ぶ線分から等距離の位置に互いに離間して配設されていることを特徴とするローラバニッシュ加工装置（１０）。     In the roller burnishing apparatus (10) according to claim 1,
    The pair of burnish rollers (14, 16) have the same outer diameter, and an axis of the shaft portion (102) of the crankshaft (100) and a rotation axis of the first backup roller (22) A roller burnishing apparatus (10), wherein the roller burnishing apparatus (10) is spaced apart from each other at equidistant positions from a connecting line segment.
  3. 　請求項１記載のローラバニッシュ加工装置（１０）において、
    　前記押圧機構（１８）は、前記第１バックアップローラ（２２）の外周面に接触して回転する第２バックアップローラ（２４）を有していることを特徴とするローラバニッシュ加工装置（１０）。     In the roller burnishing apparatus (10) according to claim 1,
    The roller burnishing apparatus (10), wherein the pressing mechanism (18) includes a second backup roller (24) that rotates in contact with an outer peripheral surface of the first backup roller (22).
  4. 　請求項１記載のローラバニッシュ加工装置（１０）において、
    　前記支持手段（２０）は、一対の前記バニッシュローラ（１４、１６）を挟むようにして配設されて当該バニッシュローラ（１４、１６）の外周面に接触して回転する一対のガイドローラ（５８、６０）と、
    　各前記ガイドローラ（５８、６０）を軸支するリテーナ（５４、５６）と、を有することを特徴とするローラバニッシュ加工装置（１０）。     In the roller burnishing apparatus (10) according to claim 1,
    The support means (20) is disposed so as to sandwich the pair of burnish rollers (14, 16), and rotates in contact with the outer peripheral surface of the burnish rollers (14, 16). )When,
    A roller burnishing apparatus (10) having a retainer (54, 56) for pivotally supporting each of the guide rollers (58, 60).
  5. 　請求項１記載のローラバニッシュ加工装置（１０）において、
    　各前記バニッシュローラ（１４、１６）の外径は、前記クランクシャフト（１００）の軸部（１０２）の外径の１／１０以上１／５以下の大きさに設定されていることを特徴とするローラバニッシュ加工装置（１０）。     In the roller burnishing apparatus (10) according to claim 1,
    The outer diameter of each of the burnish rollers (14, 16) is set to be 1/10 or more and 1/5 or less of the outer diameter of the shaft portion (102) of the crankshaft (100). Roller burnishing device (10).
PCT/JP2015/078585 2014-10-16 2015-10-08 Roller burnishing device WO2016060055A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-211577 2014-10-16
JP2014211577A JP6267623B2 (en) 2014-10-16 2014-10-16 Roller burnish processing equipment

Publications (1)

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WO2016060055A1 true WO2016060055A1 (en) 2016-04-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB901246A (en) * 1955-04-28 1962-07-18 Foote Burt Co Burnishing head
US4296620A (en) * 1978-10-16 1981-10-27 W. Hegenscheidt Gesellschaft Mbh Smoothing rolling mill
JPS59153036U (en) * 1983-03-30 1984-10-13 豊田工機株式会社 Roller hanging device
JPH0310766A (en) * 1989-06-08 1991-01-18 Nissan Motor Co Ltd Fillet roll resting device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2863921B1 (en) * 2003-12-18 2007-01-12 Renault Sas TOOL FOR LAYING

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB901246A (en) * 1955-04-28 1962-07-18 Foote Burt Co Burnishing head
US4296620A (en) * 1978-10-16 1981-10-27 W. Hegenscheidt Gesellschaft Mbh Smoothing rolling mill
JPS59153036U (en) * 1983-03-30 1984-10-13 豊田工機株式会社 Roller hanging device
JPH0310766A (en) * 1989-06-08 1991-01-18 Nissan Motor Co Ltd Fillet roll resting device

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