WO2010100984A1 - ショットピーニング加工条件の設定方法 - Google Patents
ショットピーニング加工条件の設定方法 Download PDFInfo
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- WO2010100984A1 WO2010100984A1 PCT/JP2010/051202 JP2010051202W WO2010100984A1 WO 2010100984 A1 WO2010100984 A1 WO 2010100984A1 JP 2010051202 W JP2010051202 W JP 2010051202W WO 2010100984 A1 WO2010100984 A1 WO 2010100984A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
- B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
Definitions
- the present invention relates to a shot peening processing method.
- the shot peening method is used to impart compressive residual stress to the metal surface layer.
- a medium projection material
- a workpiece is projected onto a workpiece.
- the processing conditions are determined so as to obtain the intensity and coverage required for the workpiece. There is a need for an effective and systematic method for reducing the time required for shot peening.
- Japanese Unexamined Patent Publication No. 2006-205342 discloses a conventional method for setting shot peening conditions. Using a pneumatic shot peening apparatus, the relationship between the weight of the projection material projected per unit time and the arc height value when 100% coverage is obtained is obtained. In a region where the weight of the projection material projected per unit time is larger than a certain value, the arc height value greatly decreases as the weight of the projection material projected per unit time increases. Based on this value, the optimum value of the weight of the projection material projected per unit time is set.
- An object of the present invention is to provide a method for setting shot peening processing conditions and a method for manufacturing a metal part in which the time required for shot peening processing is shortened.
- a shot peening processing condition setting method for a projection time of an arc height value of an almen test piece in each of a plurality of projection conditions for a first combination as a combination of a shot peening apparatus and a medium Obtaining a saturation time based on a saturation curve indicating a change, and determining a first optimum projection condition corresponding to the first combination based on the saturation time.
- the condition factors of the plurality of projection conditions include a first condition factor and a second condition factor.
- the plurality of projection conditions include a first projection condition, a second projection condition that differs only in the level of the first projection condition and the first condition factor, a third projection condition, the third projection condition, and the second projection condition. 4th projection conditions from which only the level of a condition factor differs are included.
- the step of determining the first optimum projection condition based on the saturation time is based on the first saturation time in the first projection condition and the second saturation time in the second projection condition. Determining the level of the first condition factor in the condition, the third saturation time in the third projection condition, and the fourth saturation time in the fourth projection condition, and the first optimal projection condition. Determining a level of a two-condition factor.
- the shot peening apparatus projects a medium from a nozzle using air.
- the first condition factor and the second condition factor are: media flow rate, air pressure, distance between the nozzle and the surface to be processed, angle between the nozzle and the surface to be processed, inner diameter of the nozzle, and Any two selected from the moving speed.
- the shot peening apparatus projects media using an impeller.
- the first condition factor and the second condition factor are the rotation speed of the impeller, the distance between the impeller and the surface to be processed, the angle between the impeller and the surface to be processed, the size of the injection port, and the object to be processed. These are arbitrary two selected from the moving speed and the rotational speed of the workpiece.
- the shot peening processing apparatus projects a medium onto a test piece under the first optimum projection condition, and the relationship between the distribution of the indentation area ratio in the test piece and the projection time. And determining the relationship between the projection time and the area or width of the region where the indentation area ratio in the test piece is saturated based on the relationship between the distribution of the indentation area ratio and the projection time.
- the indentation area ratio represents an area occupied by an indentation by a medium per unit area.
- the shot peening processing condition setting method further includes a step of determining a spot movement condition based on a relationship between the area or the width and the projection time.
- the spot movement condition indicates a pitch of parallel movement trajectories in which spots as a region of the workpiece hit by a medium move when the shot peening apparatus is processing the workpiece.
- the shot peening processing device and the medium are combined.
- the shot peening processing condition setting method further includes a step of obtaining an intensity in the first optimum projection condition.
- the shot peening processing condition setting method uses the almen test piece used in the step of obtaining the saturation time, and sets a coverage time as a projection time at which the coverage is 100% in each of the plurality of projection conditions. Determining a third optimum projection condition corresponding to the first combination based on the coverage time; determining a fourth optimum projection condition based on the first optimum projection condition and the third optimum projection condition; And determining.
- the shot peening processing condition setting method includes a step in which a shot peening processing device projects media onto a test piece, and a step of obtaining a relationship between a distribution of indentation area ratios in the test piece and a projection time. And a step of obtaining a relation between the projection time and the area or width of a region where the indentation area ratio is saturated in the test piece based on the relationship between the distribution of the impression area ratio and the projection time.
- the indentation area ratio represents an area occupied by an indentation by a medium per unit area.
- a method for setting shot peening processing conditions, in each of a plurality of projection conditions for a first combination as a combination of a shot peening processing device and a medium, with respect to a projection time of coverage of an almen specimen A step of obtaining a coverage time as a projection time at which the coverage becomes 100% based on the saturation curve shown; and a step of determining an optimum projection condition corresponding to the first combination based on the coverage time.
- the condition factors of the plurality of projection conditions include a first condition factor and a second condition factor.
- the plurality of projection conditions include a first projection condition, a second projection condition that differs only in the level of the first projection condition and the first condition factor, a third projection condition, the third projection condition, and the second projection condition. 4th projection conditions from which only the level of a condition factor differs are included.
- the step of determining the optimum projection condition based on the coverage time includes the step of determining the optimum projection condition based on a first coverage time in the first projection condition and a second coverage time in the second projection condition. Determining a level of one condition factor, and a level of the second condition factor in the optimum projection condition based on a third coverage time in the third projection condition and a fourth coverage time in the fourth projection condition. Determining.
- a metal part manufacturing method includes a step of determining shot peening processing conditions and a step of processing a workpiece based on the shot peening processing conditions.
- the step of determining the shot peening processing condition includes a saturation curve indicating a change in arc height value of the almen specimen with respect to the projection time in each of a plurality of projection conditions for the first combination as a combination of the shot peening processing apparatus and the medium. And determining a first optimum projection condition corresponding to the first combination based on the saturation time.
- the metal part manufacturing method includes a step of determining shot peening processing conditions and a step of processing a workpiece based on the shot peening processing conditions.
- the step of determining the shot peening processing conditions includes a step in which a shot peening processing apparatus projects a medium onto a test piece, a step of obtaining a relationship between a distribution of an indentation area ratio in the test piece and a projection time, and the indentation area ratio. Determining the relationship between the projection time and the area or width of a region where the indentation area ratio in the test piece is saturated based on the relationship between the distribution and the projection time, and the area or the width and the projection time. Determining a spot movement condition based on the relationship between The spot moving condition indicates a moving condition of a spot as a region of the workpiece that is hit by a medium when the shot peening apparatus is processing the workpiece.
- the metal part manufacturing method includes a step of determining shot peening processing conditions and a step of processing a workpiece based on the shot peening processing conditions.
- the step of determining the shot peening processing condition is based on a saturation curve indicating a change of the coverage of the almen specimen with respect to the projection time in each of a plurality of projection conditions for the first combination as a combination of the shot peening processing apparatus and the medium. And determining a coverage time as a projection time at which the coverage is 100%, and determining an optimum projection condition corresponding to the first combination based on the coverage time.
- a method for setting shot peening processing conditions and a method for manufacturing a metal part in which the time required for shot peening processing is shortened.
- FIG. 1 is a flowchart of the shot peening processing method according to the first embodiment of the present invention.
- FIG. 2 is a flowchart of steps for determining shot peening processing conditions.
- FIG. 3 is a flowchart of steps for determining the optimum processing conditions corresponding to the combination of the apparatus and the media.
- FIG. 4 is a flowchart of steps for determining the optimum projection condition.
- FIG. 5 is a schematic diagram showing the positional relationship between the projection unit and the workpiece surface of the shot peening processing apparatus.
- FIG. 6 is a table showing projection conditions.
- FIG. 7 is a graph showing the relationship between arc height and projection time.
- FIG. 8A is a graph showing the relationship between intensity and saturation time and pressure.
- FIG. 8B is a graph showing the relationship between intensity and saturation time and media flow rate.
- FIG. 8C is a graph showing the relationship between intensity and saturation time and projection angle.
- FIG. 8D is a graph showing the relationship between intensity, saturation time, and projection distance.
- FIG. 9 is a flowchart of steps for determining spot movement conditions.
- FIG. 10 shows a test piece for determining the relationship between the indentation area ratio distribution and the projection time.
- FIG. 11 is a graph showing the relationship between the indentation area ratio distribution and the projection time.
- FIG. 12 is a graph showing the relationship between the effective processing width and the projection time.
- FIG. 13 is a schematic diagram showing a spot movement locus.
- FIG. 14 is a graph showing the relationship between the effective processing width and the projection time.
- FIG. 15 is a graph showing the relationship between the processing time per unit area and the projection time.
- FIG. 16 is a flowchart of steps for determining an optimum projection condition according to the second embodiment of the present invention.
- FIG. 17 is a table showing projection conditions.
- FIG. 18 is a flowchart of steps for determining an optimum projection condition according to the third embodiment of the present invention.
- FIG. 19 is a graph showing the relationship between coverage and projection time.
- FIG. 1 is a flowchart of the shot peening processing method according to the first embodiment of the present invention.
- the shot peening processing method includes steps S1 and S2.
- step S1 shot peening processing conditions are determined.
- step S2 the workpiece is processed based on the conditions determined in step S1.
- step S1 for determining shot peening processing conditions includes steps S11 to S13.
- step S11 a combination of a shot peening apparatus and media is determined.
- the shot peening apparatus to be evaluated is specifically determined such as which model of the pneumatic shot peening apparatus or which model of the mechanical shot peening apparatus.
- the pneumatic shot peening apparatus projects air from nozzles using air.
- the mechanical shot peening apparatus projects media using an impeller.
- one of the media that can be used in the determined shot peening processing apparatus and managed according to a certain quality standard is determined. By using media managed according to a certain quality standard, reproducibility of shot peening is ensured.
- the media managed according to a certain quality standard is, for example, media defined by public standards.
- step S12 an optimum machining condition corresponding to the combination determined in step S11 is determined.
- step S13 when the workpiece is machined based on the optimum machining conditions determined in step S12 using the shot peening apparatus and media determined in step S11, the intensity required for the workpiece is satisfied. Judge. If the intensity request is not satisfied, the process returns to step S11. If the intensity request is satisfied, the process proceeds to step S2.
- step S12 for determining the optimum machining condition includes steps S20 and S30.
- step S20 the optimum projection condition for the case where the shot peening apparatus determined in step S11 projects the medium determined in step S11 is determined.
- step S30 spot movement conditions are determined.
- the spot moving condition indicates a moving condition of a spot as a region of the workpiece that is hit by the medium when the shot peening apparatus determined in step S11 is processing the workpiece.
- step S20 for determining the optimum projection condition includes steps S21 to S26.
- a condition factor to be evaluated is determined.
- the evaluation target condition factors in the case of a pneumatic shot peening machine include, for example, the flow rate (kg / min) of the medium, the air pressure (MPa), the nozzle as the projection unit of the pneumatic shot peening machine, the surface of the workpiece Distance (projection distance), angle between nozzle and workpiece surface (projection angle), nozzle inner diameter, and nozzle moving speed.
- the evaluation target condition factors in the case of the mechanical shot peening apparatus are, for example, the rotational speed (rpm) of the impeller as the projection unit of the mechanical shot peening apparatus, the distance between the impeller and the workpiece surface (projection distance), the impeller And the surface of the object to be processed (projection angle), the size of the ejection port through which the medium is ejected to the object to be processed, the moving speed of the object to be processed, and the rotational speed (rpm) of the object to be processed.
- a distance D between the projection unit 1 and the workpiece surface 2 of the shot peening apparatus and an angle ⁇ between the projection unit 1 and the workpiece surface 2 are shown.
- a plurality of projection conditions are determined.
- the condition factors of the plurality of projection conditions include the flow rate, pressure, angle, distance, and the like as the condition factors determined in step S21.
- FIG. 6 shows projection conditions 1-1 to 1-3 included in a plurality of projection conditions.
- the projection conditions 1-1 to 1-3 are different from each other only in the flow rate level, and the levels of other condition factors are the same.
- the plurality of projection conditions include a projection condition group in which only the pressure level is different, a projection condition group in which only the angle level is different, a projection condition group in which only the distance level is different, and the like.
- step S23 a saturation curve indicating a change in the arc height value of the almen test piece with respect to the projection time is created in each of the plurality of projection conditions determined in step S22.
- FIG. 7 shows a saturation curve 10 obtained based on the arc height value when the projection time is 5 seconds, 10 seconds, 20 seconds, and 40 seconds under a certain projection condition.
- step S24 based on the saturation curve obtained in step S23, the intensity and saturation time in each of the plurality of projection conditions determined in step S22 are obtained.
- the saturation point 11 the point 11 on the saturation curve 10 where the arc height increment is 10% or less even if the projection time is doubled is called the saturation point 11 and is saturated.
- the arc height value at the point 11 is intensity I
- the projection time at the saturation point 11 is the saturation time S.
- step S25 the optimum level for each condition factor is determined so that the saturation time is minimized.
- FIG. 8A shows the relationship between intensity and pressure and saturation time and pressure obtained as described above. Based on the relationship between the saturation time and the pressure, the optimum level of pressure is determined to be 0.3 MPa or more.
- FIG. 8B shows the relationship between the intensity and the flow rate obtained as described above, and the relationship between the saturation time and the flow rate. Based on the relationship between saturation time and flow rate, the optimum level of flow rate is determined to be 4 kg / min.
- FIG. 8C shows the relationship between intensity and angle and the relationship between saturation time and angle obtained as described above. Based on the relationship between saturation time and angle, the optimum level of angle is determined to be 90 degrees.
- FIG. 8D shows the relationship between intensity and distance and saturation time and distance obtained as described above. Based on the relationship between saturation time and distance, the optimum level of distance is determined to be 200 mm or less.
- step S26 the optimum projection condition corresponding to the combination of the shot peening apparatus and media determined in step S11 is determined.
- the optimum projection condition is a combination of the optimum levels of the condition factors determined in step S25.
- the projection condition 1-2 shown in FIG. 6 corresponds to the optimum projection condition determined in step S26. Therefore, the intensity in the optimum projection condition is obtained from FIG. 8B. Therefore, the intensity that can be obtained efficiently (with a short processing time) by the combination of the shot peening apparatus and the medium determined in step S11 is 0.011 inch from FIG. 8B. Note that the intensity under the optimum projection condition may be obtained by performing another test.
- step S26 the process proceeds to step S30.
- the optimum projection condition that shortens the processing time when processing using the combination determined in step S11 is determined.
- the shorter the saturation time the shorter the coverage time when the coverage becomes 100%.
- the saturation time is easier to determine than the coverage time.
- Step S30 for determining the spot movement condition will be described below.
- step S30 includes steps S31 to S33.
- FIG. 10 shows the test piece 5 used in step S31.
- the test piece 5 is an almen test piece or a plate formed of the same material as the object to be processed. It is preferable that the test piece 5 is sufficiently large with respect to an effective processing width (area) described later.
- the shot peening apparatus determined in step S11 projects the medium determined in step S11 onto the test piece 5 under the optimal projection conditions determined in step S20.
- the projection time at this time for example, about three levels are set within a range including the saturation time in the optimum projection condition.
- the projection part of the shot peening apparatus and the test piece 5 may be relatively moved under a certain condition. In this case, for example, the projection unit translates or swings so that a spot as a region where the medium hits reciprocates along the center line 4 of the test piece 5.
- the length of the test piece 5 in the direction of the center line 4 is X.
- step S31 the surface of the test piece 5 after the projection is observed using a magnifying glass, and the indentation area ratio is calculated for each of the plurality of area ratio calculation regions 7 defined on the surface of the test piece 5.
- the plurality of area ratio calculation regions 7 are arranged along a straight line orthogonal to the center line 4 and the center position 6 on both sides of the center line 4 of the test piece 5.
- the plurality of area ratio calculation regions 7 are regions having the same shape and the same size.
- Each area ratio calculation area 7 is, for example, a rectangular area of 2.56 mm square. The figure which shows the measurement position of the area ratio calculation area
- region 7 is shown by the figure.
- the absolute value of this number increases with distance from the center position 6, and the sign of this number is positive on one side of the center line 4 and negative on the other side of the center line 4.
- the indentation area ratio indicates the area occupied by the indentation (dimple) formed by the medium per unit area.
- step S31 the relationship between the distribution of the indentation area ratio in the test piece 5 and the projection time is obtained.
- FIG. 11 shows the relationship between the distribution of the indentation area ratio in the test piece 5 and the projection time.
- the vertical axis and the horizontal axis in FIG. 11 are the indentation area ratio and the measurement position on the test piece 5, respectively.
- the relationship between the indentation area ratio and the measurement position is shown for each of the cases where the projection time is 1, 2, 3, 4 seconds.
- step S32 based on the relationship between the distribution of the indentation area ratio shown in FIG. 11 and the projection time, the indentation area ratio in the test piece 5 is saturated for each of the projection times of 1, 2, 3, and 4 seconds. Find the width of the area. A region where the indentation area ratio is saturated is a region where the coverage reaches 100% or more. The width of the region where the indentation area ratio is saturated is called the effective processing width. Note that the area (effective processing area) of this region can be used instead of the width (effective processing width) of the region where the indentation area ratio in the test piece 5 is saturated.
- FIG. 12 shows the relationship between the effective processing width and the projection time. The vertical axis in FIG. 12 is the effective processing width, and the horizontal axis is the projection time. When the projection time increases, the effective processing width increases, but when the projection time exceeds 1 second, the increase in the effective processing width becomes dull.
- step S33 the spot movement condition is determined from the relationship between the effective processing width and the projection time in FIG. Referring to FIG. 13, when the shot peening processing apparatus determined in step S11 processes workpiece 3, a spot as a region of workpiece 3 hit by the medium reciprocates along each of movement trajectories 4A to 4C.
- the movement trajectories 4A to 4C are parallel to each other.
- the length of the workpiece 3 in the direction of the movement trajectories 4A to 4C is Y
- the pitch of the movement trajectories 4A to 4C is P.
- the pitch P is an interval between adjacent ones of the movement trajectories 4A to 4C.
- the pitch P is 25 mm
- the projection time for reciprocating the spot along each of the movement trajectories 4A to 4C is 1 second ( (Y / X) times is determined as the spot movement condition.
- FIG. 14 shows another example of the relationship between the effective processing width w and the projection time t.
- the coverage in a rectangular area having a length X and a width w is 100% or more. That is, the area Xw is processed at time t.
- the processing time per unit area is proportional to t / w.
- FIG. 15 shows the relationship between t / w and t obtained from the relationship between the effective processing width w and the projection time t in FIG.
- the pitch P is 9 mm based on the t value 1.5 seconds at which the t / w value is minimum and the effective processing width 9 mm at that time, and along each of the movement trajectories 4A to 4C. It is determined as the spot moving condition that the projection time for reciprocating the spot is (Y / X) times 1.5 seconds.
- step S13 after step S20 and before step S30.
- step S20 after fixing the level of a specific condition factor, the optimum level of another condition factor may be determined. For example, when the surface of the object to be processed has many irregularities and the entire surface of the object to be processed cannot be projected at a projection angle of 90 degrees, the optimum level of other condition factors is determined after fixing the projection angle to 45 degrees. .
- the shot peening processing condition setting method according to the second embodiment of the present invention is different from the shot peening processing condition according to the first embodiment except that step S20 is replaced by step S210 that determines the optimum projection condition. This is the same as the setting method.
- step S210 includes the above-described steps S21 to S24 and steps S211 to S214.
- step S211 as in step S25, the level at which the saturation time is the shortest for each condition factor is determined.
- step S212 an additional test is performed near the level determined in step S211.
- FIG. 17 shows an example of the projection condition in the additional test.
- the projection condition 1-4 is the same as the projection condition 1-2 except that the flow rate is 3 kg / min.
- the projection condition 1-5 is the same as the projection condition 1-2 except that the flow rate is 5 kg / min.
- the projection condition 1-6 is the same as the projection condition 1-2 except that the pressure is 0.2 MPa. Intensity and saturation time are obtained for each projection condition.
- step S213 the optimum level for each condition factor is determined based on the saturation time obtained in step S212 and the saturation time obtained in step S24.
- step S214 the optimum projection condition corresponding to the combination of the shot peening apparatus and media determined in step S11 is determined.
- the optimum projection condition is a combination of the optimum levels of the condition factors determined in step S213.
- the shot peening processing condition setting method according to the third embodiment of the present invention is based on the shot according to the first or second embodiment except that step S20 is replaced by step S220 and step S30 is omitted. This is the same as the method for setting peening conditions.
- step S220 includes the aforementioned steps S21 to S26 and steps S221 to S224.
- step S221 the relationship between the coverage of the entire surface of the almen test piece and the projection time is obtained for each of the plurality of projection conditions determined in step S22 using the almen test piece used in step S23.
- the coverage is determined based on, for example, a comparison between a coverage determination photograph and the surface of an almen test piece as described in the appendix of JIS B 2711.
- a saturation curve indicating the change of the coverage with respect to the projection time as shown in FIG. 19 is obtained.
- the vertical axis in FIG. 19 is the coverage
- the horizontal axis is the projection time.
- a coverage time C as a projection time when the coverage becomes 100% is obtained.
- the coverage time is obtained for each of the plurality of projection conditions.
- step S222 the optimum level for each condition factor is determined so that the coverage time is minimized.
- step S223 the optimum projection condition corresponding to the combination of the shot peening apparatus and media determined in step S11 is determined.
- the optimum projection condition is a combination of the optimum levels of the condition factors determined in step S222.
- one optimum projection condition is determined based on the optimum projection condition determined in step S26 and the optimum projection condition determined in step S223.
- the optimal projection condition determined in step S26 may be determined by selecting one of the optimal projection condition determined in step S26 and the optimal projection condition determined in step S223, and the optimal projection condition determined in step S26 is determined in step S223.
- the optimum projection condition in step S224 may be determined by correcting the optimum projection condition determined in step S224.
- step S2 the workpiece is processed based on the optimum projection condition determined in step S224.
- the optimum projection condition is determined so that the coverage time is surely shortened.
- the optimal projection condition may be determined based only on the coverage time without determining the optimal projection condition based on the saturation time.
Abstract
Description
図1は、本発明の第1の実施形態に係るショットピーニング加工方法のフローチャートである。ショットピーニング加工方法は、ステップS1及びS2を含む。ステップS1において、ショットピーニング加工条件を決定する。ステップS2において、ステップS1で決定した条件に基づいて被加工物を加工する。
本発明の第2の実施形態に係るショットピーニング加工条件の設定方法は、ステップS20が最適投射条件を決定するステップS210で置き換えられている点を除いて第1の実施形態に係るショットピーニング加工条件の設定方法と同じである。
本発明の第3の実施形態に係るショットピーニング加工条件の設定方法は、ステップS20がステップS220で置き換えられ、ステップS30が除かれている点を除いて第1又は第2の実施形態に係るショットピーニング加工条件の設定方法と同じである。
Claims (15)
- ショットピーニング加工装置とメディアの組み合わせとしての第1組み合わせに対する複数の投射条件の各々において、アルメン試験片のアークハイト値の投射時間に対する変化を示す飽和曲線に基づいて飽和時間を求めるステップと、
前記第1組み合わせに対応する第1最適投射条件を前記飽和時間に基づいて決定するステップと
を具備する
ショットピーニング加工条件の設定方法。 - 前記複数の投射条件の条件因子は、第1条件因子と、第2条件因子とを含み、
前記複数の投射条件は、第1投射条件と、前記第1投射条件と前記第1条件因子の水準のみが異なる第2投射条件と、第3投射条件と、前記第3投射条件と前記第2条件因子の水準のみが異なる第4投射条件とを含み、
前記第1最適投射条件を前記飽和時間に基づいて決定する前記ステップは、
前記第1投射条件における第1飽和時間と前記第2投射条件における第2飽和時間とに基づいて、前記第1最適投射条件における前記第1条件因子の水準を決定するステップと、
前記第3投射条件における第3飽和時間と前記第4投射条件における第4飽和時間とに基づいて、前記第1最適投射条件における前記第2条件因子の水準を決定するステップとを含む
請求項1のショットピーニング加工条件の設定方法。 - 前記ショットピーニング加工装置は、空気を用いてメディアをノズルから投射し、
前記第1条件因子及び前記第2条件因子は、メディア流量、空気の圧力、前記ノズルと被処理面との距離、前記ノズルと被処理面との角度、前記ノズルの内径、及び、前記ノズルの移動速度から選択される任意の二つである
請求項2のショットピーニング加工条件の設定方法。 - 前記ショットピーニング加工装置は、インペラーを用いてメディアを投射し、
前記第1条件因子及び前記第2条件因子は、前記インペラーの回転速度、前記インペラーと被処理面との距離、前記インペラーと被処理面との角度、噴射口の大きさ、及び、被処理物の移動速度、及び被処理物の回転速度から選択される任意の二つである
請求項2のショットピーニング加工条件の設定方法。 - 前記ショットピーニング加工装置が前記第1最適投射条件において試験片にメディアを投射するステップと、
前記試験片における圧痕面積率の分布と投射時間の関係を求めるステップと、
前記圧痕面積率の分布と投射時間の関係に基づいて、前記試験片における前記圧痕面積率が飽和している領域の面積又は幅と前記投射時間との関係を求めるステップと
を更に具備し、
前記圧痕面積率は、単位面積当たりのメディアによる圧痕が占める面積を示す
請求項1又は2のショットピーニング加工条件の設定方法。 - 前記面積又は前記幅と前記投射時間との関係に基づいてスポット移動条件を決定するステップを更に具備し、
前記スポット移動条件は、前記ショットピーニング加工装置が被加工物を加工しているときにメディアが当たっている前記被加工物の領域としてのスポットが移動する互いに平行な移動軌跡のピッチを示す
請求項5のショットピーニング加工条件の設定方法。 - 前記第1最適投射条件に対応するインテンシティが被加工物に要求されるインテンシティに合わないとき、
ショットピーニング加工装置とメディアの組み合わせとしての第2組み合わせに対する複数の投射条件の各々において、飽和時間を求めるステップと、
前記第2組み合わせに対応する第2最適投射条件を前記第2組み合わせに対応する前記飽和時間に基づいて決定するステップと
を更に具備する
請求項1乃至6のいずれかに記載のショットピーニング加工条件の設定方法。 - 前記第1最適投射条件におけるインテンシティを求めるステップを更に具備する
請求項1乃至7のいずれかに記載のショットピーニング加工条件の設定方法。 - 前記飽和時間を求めるステップにおいて使用したアルメン試験片を用いて、前記複数の投射条件の各々においてカバレージが100%となる投射時間としてのカバレージ時間を求めるステップと、
前記第1組み合わせに対応する第3最適投射条件を前記カバレージ時間に基づいて決定するステップと、
前記第1最適投射条件及び前記第3最適投射条件に基づいて第4最適投射条件を決定するステップと
を更に具備する
請求項1乃至4のいずれかに記載のショットピーニング加工条件の設定方法。 - ショットピーニング加工装置が試験片にメディアを投射するステップと、
前記試験片における圧痕面積率の分布と投射時間の関係を求めるステップと、
前記圧痕面積率の分布と投射時間の関係に基づいて、前記試験片における前記圧痕面積率が飽和している領域の面積又は幅と前記投射時間との関係を求めるステップと
を具備し、
前記圧痕面積率は、単位面積当たりのメディアによる圧痕が占める面積を示す
ショットピーニング加工条件の設定方法。 - ショットピーニング加工装置とメディアの組み合わせとしての第1組み合わせに対する複数の投射条件の各々において、アルメン試験片のカバレージの投射時間に対する変化を示す飽和曲線に基づいてカバレージが100%となる投射時間としてのカバレージ時間を求めるステップと、
前記第1組み合わせに対応する最適投射条件を前記カバレージ時間に基づいて決定するステップと
を具備する
ショットピーニング加工条件の設定方法。 - 前記複数の投射条件の条件因子は、第1条件因子と、第2条件因子とを含み、
前記複数の投射条件は、第1投射条件と、前記第1投射条件と前記第1条件因子の水準のみが異なる第2投射条件と、第3投射条件と、前記第3投射条件と前記第2条件因子の水準のみが異なる第4投射条件とを含み、
前記最適投射条件を前記カバレージ時間に基づいて決定する前記ステップは、
前記第1投射条件における第1カバレージ時間と前記第2投射条件における第2カバレージ時間とに基づいて、前記最適投射条件における前記第1条件因子の水準を決定するステップと、
前記第3投射条件における第3カバレージ時間と前記第4投射条件における第4カバレージ時間とに基づいて、前記最適投射条件における前記第2条件因子の水準を決定するステップと
を含む
請求項11のショットピーニング加工条件の設定方法。 - ショットピーニング加工条件を決定するステップと、
前記ショットピーニング加工条件に基づいて被加工物を加工するステップと
を具備し、
前記ショットピーニング加工条件を決定する前記ステップは、
ショットピーニング加工装置とメディアの組み合わせとしての第1組み合わせに対する複数の投射条件の各々において、アルメン試験片のアークハイト値の投射時間に対する変化を示す飽和曲線に基づいて飽和時間を求めるステップと、
前記第1組み合わせに対応する第1最適投射条件を前記飽和時間に基づいて決定するステップと
を含む
金属部品の製造方法。 - ショットピーニング加工条件を決定するステップと、
前記ショットピーニング加工条件に基づいて被加工物を加工するステップと
を具備し、
前記ショットピーニング加工条件を決定する前記ステップは、
ショットピーニング加工装置が試験片にメディアを投射するステップと、
前記試験片における圧痕面積率の分布と投射時間の関係を求めるステップと、
前記圧痕面積率の分布と投射時間の関係に基づいて、前記試験片における前記圧痕面積率が飽和している領域の面積又は幅と前記投射時間との関係を求めるステップと、
前記面積又は前記幅と前記投射時間との関係に基づいてスポット移動条件を決定するステップと
を含み、
前記スポット移動条件は、前記ショットピーニング加工装置が前記被加工物を加工しているときにメディアが当たっている前記被加工物の領域としてのスポットの移動条件を示す
金属部品の製造方法。 - ショットピーニング加工条件を決定するステップと、
前記ショットピーニング加工条件に基づいて被加工物を加工するステップと
を具備し、
前記ショットピーニング加工条件を決定する前記ステップは、
ショットピーニング加工装置とメディアの組み合わせとしての第1組み合わせに対する複数の投射条件の各々において、アルメン試験片のカバレージの投射時間に対する変化を示す飽和曲線に基づいてカバレージが100%となる投射時間としてのカバレージ時間を求めるステップと、
前記第1組み合わせに対応する最適投射条件を前記カバレージ時間に基づいて決定するステップと
を含む
金属部品の製造方法。
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CN2010800107070A CN102341217B (zh) | 2009-03-04 | 2010-01-29 | 喷丸强化加工条件的设定方法 |
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EP (1) | EP2404705B1 (ja) |
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US20130074305A1 (en) * | 2011-09-23 | 2013-03-28 | Apple Inc. | Shot peening/blasting process for part flatness |
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US9063049B2 (en) * | 2011-11-25 | 2015-06-23 | Hydro Honing Laboratories, Inc. | Apparatus and method for quantifying metal surface treatment |
DE112013003216T5 (de) * | 2012-06-27 | 2015-04-02 | Sintokogio, Ltd. | Kugelstrahlverfahren, Kugelstrahlbeurteilungsverfahren, und Kugelstrahlbeurteilungsaufbaustruktur |
DE102013106789B4 (de) | 2013-06-28 | 2020-06-18 | Carl Zeiss Ag | Brillenglas mit veränderlicher Transparenz und Verfahren zur Herstellung eines Brillenglases |
JP6420095B2 (ja) | 2014-08-28 | 2018-11-07 | ブラスト工業株式会社 | ブラスト加工装置及びブラスト加工方法 |
JP6640451B2 (ja) * | 2015-02-05 | 2020-02-05 | 三菱重工業株式会社 | 残留応力評価方法 |
FR3034336B1 (fr) * | 2015-03-31 | 2017-10-27 | Mz Intelligent Systems | Procede de grenaillage pour formage precis de panneaux metalliques de grande taille |
JP7271060B2 (ja) * | 2019-03-13 | 2023-05-11 | ジヤトコ株式会社 | ショットピーニング条件の設定方法 |
CN110514536A (zh) * | 2019-08-30 | 2019-11-29 | 中国航发动力股份有限公司 | 一种用于检测喷丸强度的校验装置及方法 |
CN112643554B (zh) * | 2020-12-22 | 2022-07-05 | 中船重工龙江广瀚燃气轮机有限公司 | 一种叶片液体喷丸控制方法 |
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US9289880B2 (en) | 2016-03-22 |
EP2404705B1 (en) | 2016-01-27 |
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JP5072885B2 (ja) | 2012-11-14 |
TWI436860B (zh) | 2014-05-11 |
US20120017661A1 (en) | 2012-01-26 |
EP2404705A1 (en) | 2012-01-11 |
JP2010201569A (ja) | 2010-09-16 |
CN102341217A (zh) | 2012-02-01 |
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