WO2013005590A1 - 研削加工盤及び研削加工方法 - Google Patents
研削加工盤及び研削加工方法 Download PDFInfo
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- WO2013005590A1 WO2013005590A1 PCT/JP2012/066076 JP2012066076W WO2013005590A1 WO 2013005590 A1 WO2013005590 A1 WO 2013005590A1 JP 2012066076 W JP2012066076 W JP 2012066076W WO 2013005590 A1 WO2013005590 A1 WO 2013005590A1
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- grinding
- workpiece
- grindstone
- start position
- gauge
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- 238000000034 method Methods 0.000 claims description 62
- 238000004364 calculation method Methods 0.000 claims description 10
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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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
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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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
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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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
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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
- B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
Definitions
- the present invention relates to grinding technology.
- teaching work for the inner ring includes manual operation of the cutting shaft up to a position where the grindstone hits (contacts) the inner surface of the inner ring.
- teaching work on the outer ring includes manual operation of the cutting shaft up to a position where the grindstone hits (contacts) the raceway groove of the outer ring.
- teaching work applying work
- workers engaged in teaching work are required to have high skills for grinding.
- the teaching work may take time, and the time required for switching the setting of the workpiece may be prolonged. As a result, it may be difficult to increase the efficiency of grinding for the workpiece.
- an error may occur in the position where the grindstone is applied to the workpiece due to the difference in the skill for grinding for each worker.
- the workpiece cannot be accurately ground, and as a result, defective products may be generated and the yield may be significantly reduced.
- the present invention is intended to solve such problems, and its purpose is to shorten the time required for switching the setting of the workpiece and to accurately apply the grindstone to the workpiece. It is to provide a grinding technique that enables the workpiece to be precisely ground.
- the present invention is a grinding machine having a grindstone for grinding a workpiece and a grindstone control system for moving the grindstone relative to the workpiece.
- a first control unit that sets the temporary grinding start position S0 ′ of the grindstone with respect to the first workpiece by calculation, and the temporary grinding start position set by the first control unit
- a grinding wheel is separated from the first workpiece by a distance corresponding
- the in-process gauge detects the grinding state of the first workpiece by measuring the diameter of the first workpiece
- the fourth control unit detects the in-process gauge near the grinding completion position S4.
- the actual grinding start position S0 is determined by separating the grindstone from the first workpiece by a distance corresponding to S4 based on the gauge signal from.
- the margin amount S ⁇ is set in consideration of an error amount that occurs when the grindstone is disposed opposite to the first workpiece at the start of grinding.
- the fourth control unit in switching between the setting for grinding for a certain workpiece and the setting for grinding for another workpiece, temporarily sets the grinding for the first workpiece at the initial setting.
- the grinding work is performed on the first workpiece while moving the grinding wheel relative to the first workpiece from the grinding start position S0 ′, and the grinding stone is moved near the grinding completion position S4 based on the gauge signal from the in-process gauge.
- the actual grinding start position S0 is determined by separating it from the first workpiece by a distance corresponding to S4, and in grinding processing for the second and subsequent workpieces after setting switching, the grindstone is used as the workpiece from the actual grinding start position S0.
- the workpiece is ground while moving relative to it, and the workpiece is imprinted near the grinding completion position S4. Based on the gauge signal from Sugeji, the process of moving the grinding wheel to the actual grinding start position S0 is repeated.
- teaching work for applying a grindstone to a workpiece is not necessary, and switching of workpiece settings can be performed automatically.
- the time required for switching the setting of the workpiece can be shortened, and the workpiece can be precisely ground by accurately applying the grindstone to the workpiece. Therefore, according to this invention, generation
- (A) is a schematic diagram showing a positional relationship between a grinding start position and a grinding completion position in a grinding machine according to an embodiment of the present invention, and (b) is a grinding method according to an embodiment of the present invention.
- (A) is a block diagram showing a configuration of a grindstone control system in a grinding machine according to an embodiment of the present invention
- (b) is a flowchart showing an initial grinding process at the time of switching workpiece settings
- FIG. 1A and FIG. 2A show a configuration of a grinding machine for realizing the grinding technique of the present embodiment.
- the grinding machine has a grindstone 4 that grinds the workpiece 2 and a grindstone control system NC that moves the grindstone 4 relative to the workpiece 2.
- the grindstone 4 is supported by a quill-type support shaft 6 (also referred to as a cutting shaft or a servo shaft), and the support shaft 6 is incorporated in a grinder main body 8 controlled by the grindstone control system NC. Yes.
- the grindstone control system NC is a predetermined calculation process based on the workpiece specification database 10 in which specifications necessary for grinding of the workpieces 2 are registered in advance, and the specifications of the workpieces registered in the workpiece specification database 10. And an arithmetic processing unit 12 that executes In addition, as the workpiece
- the specifications of various workpieces 2 registered in the workpiece specification database 10 are information necessary for grinding the workpiece 2.
- the diameter (inner diameter) ID of the workpiece 2 before grinding and the position where the grindstone 4 is moved in grinding (for example, rapid feed completion position S1, rough feed completion position S2, finish feed completion position S3, fine finish feed completion Information such as a grinding feed position such as the position S4) is an example of these specifications.
- the rapid feed completion position S1 indicates a range until the grindstone 4 hits the work 2 for the first time during the grinding process, in other words, a range where the grindstone 4 does not hit the work 2.
- Each position S2, S3, S4 indicates a range until each grinding feed of rough feed grinding, finish feed grinding, and fine finish feed grinding is executed after the grindstone 4 is applied to the workpiece 2 (FIG. 1 (b)).
- the arithmetic processing unit 12 incorporates a computer (not shown) for executing various arithmetic processes necessary for grinding based on the above specifications.
- the computer includes a ROM (not shown) that stores various arithmetic processing programs, a RAM (not shown) that defines a work area for executing the arithmetic processing programs, and a CPU that executes the arithmetic processing programs on the RAM. (Not shown).
- the arithmetic processing described above is executed based on the specifications of various workpieces registered in the workpiece specification database 10, and the grinding machine body 8 is controlled based on the arithmetic processing results (for example, Feed control, rotation control, etc.).
- the grindstone 4 supported by the support shaft 6 is moved relative to the workpiece 2, and grinding processing of the workpiece 2 (each of the above-described coarse feed grinding, finish feed grinding, and fine feed grinding) Can be executed.
- the support shaft 6 is feed-controlled and rotation-controlled by, for example, an AC servomotor (not shown). Thereby, movement control of the grindstone 4 to the grinding feed positions S0, S1, S2, S3, S4 described above is performed.
- the arithmetic processing unit 12 controls the grinding machine body 8 based on the specification data for the workpiece 2 that matches the “model number” assigned to each workpiece 2.
- the “model number” is input from the input instruction unit 14 provided in the grindstone control system NC.
- the arithmetic processing unit 12 detects the current position (coordinate) signal and the target position (coordinate) signal while detecting the rotational position and rotational speed of the output shaft of the AC servomotor by an encoder (rotation detector) (not shown). And feedback control (feed control, rotation control) for the support shaft 6 is performed.
- the arithmetic processing unit 12 operates the AC servo motor in a direction to decrease the difference from the target position (coordinate) signal. (Rotate). By repeating such a procedure until the target value is finally reached or enters the allowable range, the movement control of the grindstone 4 to the grinding feed positions S0, S1, S2, S3, S4 is performed.
- the current position information (coordinates) of the AC servo motor can be recorded digitally.
- the movement of the grindstone 4 to the grinding feed positions S0, S1, S2, S3, S4 so that the grindstone 4 reaches the target value at a time by giving a difference to the target position (coordinate) signal for this information. May be controlled. By doing so, it is possible to improve the efficiency of the routine from switching the setting of the workpiece 2 to grinding.
- the grinding state of the workpiece 2 is always detected by the in-process gauge 16.
- a gauge signal indicating that is sent from the in-process gauge 16 to the grindstone control system NC (specifically, It is output to the arithmetic processing unit 12).
- the in-process gauge 16 is provided with a pair of styluses 16a facing each other. By setting the pair of styluses 16a on the grinding portion of the workpiece 2, the grinding state of the workpiece 2 is changed. It can always be detected. In this case, in order to cancel the influence of the eccentricity of the workpiece 2 during grinding, it is preferable to set the pair of styluses 16a so that the diameter (inner diameter) ID of the workpiece 2 is measured.
- the arithmetic processing unit 12 When the gauge signal from the in-process gauge 16 is output (in other words, when the gauge signal from the in-process gauge 16 is input to the arithmetic processing unit 12), the arithmetic processing unit 12 is based on the gauge signal.
- the grinder main body 8 is controlled. Thereby, the moving state of the grindstone 4 with respect to the workpiece 2 (specifically, each of the above-described coarse feed grinding, finish feed grinding, and fine finish feed grinding) is switched (see FIG. 1B).
- the arithmetic processing unit 12 switches the subsequent movement state (grind feed) of the grindstone 4 to finish feed.
- the arithmetic processing unit 12 switches the subsequent movement state (grind feed) of the grindstone 4 to fine feed.
- the arithmetic processing unit 12 sends the grindstone 4 back to the actual grinding start position S0.
- an inner ring is used as an example of the work 2.
- the part to be ground is usually the inner diameter surface or the outer diameter surface of the work 2, for example, but here, as an example, the inner surface 2s of the work (inner ring) 2 is ground.
- a setting for grinding a certain workpiece 2 and a setting for grinding the other workpiece 2 can be switched. That is, in this operation flow, the setting is switched to the work (inner ring) 2 having a different “model number”.
- the grinding process for the inner diameter surface 2s of the first workpiece (inner ring) 2 before the setting is switched will be described.
- the pair of styluses 16a of the in-process gauge 16 is set to measure the inner diameter of the workpiece (inner ring) 2, that is, the diameter ID of the inner diameter surface 2s.
- the grinding wheel control system NC calculates a temporary grinding start position S0 ′ at which the grinding wheel 4 should be positioned with respect to the inner diameter surface 2s of the workpiece 2 when grinding the first workpiece (inner ring) 2 before the setting is switched. (P3 in FIG. 2B).
- the calculation of the temporary grinding start position S0 ′ is performed by the arithmetic processing unit 12 based on the specifications of the first workpiece (inner ring) 2 registered in the workpiece specification database 10. That is, with reference to the center position CP of the support shaft 6 that supports the grindstone 4, the diameter (inner diameter) ID of the first workpiece (inner ring) 2 before grinding, the diameter WD of the grindstone, the first workpiece after grinding (inner ring) 2) From the grinding completion position S4 of 2 and the actual grinding start position S0 of the grinding wheel 4 for the second and subsequent workpieces (inner rings) 2 before grinding, the grinding wheel 4 with respect to the inner surface 2s of the first workpiece (inner ring) 2 A temporary grinding start position S0 ′ is calculated.
- the center position CP of the support shaft 6 that supports the grindstone 4 is stored in advance in the arithmetic processing unit 12 as control information for the feed control AC servo motor of the support shaft 6.
- the center position CP of the support shaft 6 that supports the grindstone 4 is a position where the rotation center line of a backing plate (not shown) that rotatably holds the workpiece (inner ring) 2 coincides with the center line of the grindstone 4. It is.
- the provisional grinding start position S0 ′ is set by calculation described later by the calculation processing unit 12 in consideration of a predetermined margin amount S ⁇ between the temporary grinding start position S0 and the actual grinding start position S0.
- the margin S ⁇ is set in consideration of the amount of error that occurs when the grindstone 4 is disposed opposite to the inner diameter surface 2s of the first workpiece (inner ring) 2 at the start of grinding (see FIG. 1A).
- the in this case for example, the following six factors are assumed as the error amount added as the margin amount S ⁇ .
- the following factors are examples, and the technical scope of the present invention is not limited thereby, and other factors can be added as the error amount of the margin amount S ⁇ .
- the arithmetic processing unit 12 sets the temporary grinding start position S0 ′ to a position that is relatively far away from the inner diameter surface 2s of the first workpiece (inner ring) 2 before grinding.
- the arithmetic processing unit 12 controls the grinder main body 8 based on the setting data, and feeds and controls the support shaft 6 to control the grindstone 4 to the temporary grinding start position S0 ′.
- the grindstone 4 is positioned at the temporary grinding start position S0 ′ (P4 in FIG. 2B).
- the arithmetic processing unit 12 grinds the inner surface 2s of the first workpiece (inner ring) 2 while moving the grindstone 4 relative to the first workpiece (inner ring) 2 from the temporary grinding start position S0 ′. Processing is executed (P5 in FIG. 2B). Specifically, the grinding process for the first workpiece (inner ring) 2 is performed according to the grinding cycle shown in FIG.
- the arithmetic processing unit 12 moves (rapid feed) the grindstone 4 from the temporary grinding start position S0 ′ to the rapid feed completion position S1 (FIG. 2). (C1) T1).
- the arithmetic processing unit 12 controls the grinder main body 8 to switch the moving state of the grindstone 4 from the rapid feed to the rough feed state.
- the coarse grind is started while the grindstone 4 is moved (rough feed) (T2 in FIG. 2C).
- the grinding state of the inner diameter surface 2s of the first workpiece (inner ring) 2 is always detected by the pair of styluses 16a of the in-process gauge 16 (T3 in FIG. 2C). ). In the vicinity of the rough feed completion position S2, the gauge signal 1 from the in-process gauge 16 is output to the arithmetic processing unit 12.
- the arithmetic processing unit 12 controls the grinding machine body 8 based on the input gauge signal 1 (T4 in FIG. 2 (c)), and roughly moves the moving state of the grindstone 4 relative to the first workpiece (inner ring) 2. Switch from grinding to finish feed grinding. Thereby, finish feed grinding is started (T5 in FIG. 2C).
- the grinding state of the inner surface 2s of the first workpiece (inner ring) 2 is always detected by the pair of styluses 16a of the in-process gauge 16 (T6 in FIG. 2C). ). In the vicinity of the finish feed completion position S3, the gauge signal 2 from the in-process gauge 16 is output to the arithmetic processing unit 12.
- the arithmetic processing unit 12 controls the grinding machine body 8 based on the input gauge signal 2 (T7 in FIG. 2 (c)), and finishes the movement state of the grindstone 4 with respect to the first workpiece (inner ring) 2 Switch from grinding to precision feed grinding. Thereby, fine feed grinding is started (T8 in FIG. 2C).
- the grinding state of the inner surface 2s of the first workpiece (inner ring) 2 is always detected by the pair of styluses 16a of the in-process gauge 16 (see FIG. 2C). T9).
- the gauge signal 3 from the in-process gauge 16 is output to the arithmetic processing unit 12 in the vicinity of the fine finish feeding completion position S4.
- the arithmetic processing unit 12 controls the grinder main body 8 based on the input gauge signal 3 (T10 in FIG. 2C) and moves it away from the inner surface 2s of the first workpiece (inner ring) 2.
- the grindstone 4 is sent back.
- the feed back amount is an amount corresponding to S4, and the grindstone 4 is separated from the inner diameter surface 2s of the first workpiece (inner ring) 2 by the feed back amount (T11 in FIG. 2C).
- the arithmetic processing unit 12 determines the actual grinding start position S0 (P6 in FIG. 2 (b)).
- the fine finish feed grinding described above can be omitted by utilizing the action of quill bending. Even in that case, the feed back control of the grindstone 4 is performed based on the input of the gauge signal 3 described above. In this case, the input of the gauge signal 2 is omitted.
- the feed back amount is an amount corresponding to S4, and the grindstone 4 is separated from the inner diameter surface 2s of the first workpiece (inner ring) 2 by the feed back amount.
- the arithmetic processing unit 12 sets the provisional grinding start position S0 ′ by the following formula in consideration of the predetermined margin S ⁇ based on the determined actual grinding start position S0.
- S0 ' ID-WD-S4-S ⁇
- the grindstone 4 is moved relative to the inner diameter surface 2s of the initial work (inner ring) 2 at the beginning of setting from the temporary grinding start position S0 ′. Grinding of the inner surface 2s of the first workpiece (inner ring) 2 can be executed. Then, in the vicinity of the grinding completion position S4, based on the gauge signal 3 from the in-process gauge 16, the grinding wheel 4 is separated from the inner diameter surface 2s of the first workpiece (inner ring) 2 by S4 to start actual grinding. The position S0 is determined.
- the grindstone 4 is moved relative to the inner diameter surface 2s of the workpiece (inner ring) 2 from the actual grinding start position S0.
- the grinding process to the inner surface 2s of the workpiece (inner ring) 2 is executed.
- the process of moving the grindstone 4 to the actual grinding start position S0 is repeated again based on the gauge signal 3 from the in-process gauge 16.
- the gauge signal may be output when the grindstone has not yet reached each of the positions S2, S3, S4, or when the position has slightly exceeded each of the positions S2, S3, S4.
- the gauge signal is output in the vicinity of each of the positions S2, S3, and S4 in the process of moving the grindstone toward the positions S2, S3, and S4. It is described as something.
- the positional relationship between the work (inner ring) 2 and the grindstone 4 can be automatically set. Thereby, since the time required for switching the setting of the workpiece (inner ring) 2 can be shortened, the grinding process for the workpiece (inner ring) 2 can be made more efficient.
- the grindstone 4 can be accurately applied to the workpiece (inner ring) 2 even if the skill of grinding for each worker engaged in setting switching is superior or inferior. Thereby, since it can grind with respect to the workpiece
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Abstract
Description
また、本発明において、インプロセスゲージは、最初のワークの直径を計測することで、当該最初のワークの研削加工状態を検出し、第4制御部は、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで、実際の研削開始位置S0を確定する。
また、本発明において、余裕量Sαは、研削加工開始時に砥石を最初のワークに対向配置した際に生じる誤差量を考慮して設定される。
また、本発明において、あるワークに対する研削加工のためのセッティングと、他のワークに対する研削加工のためのセッティングとの切り替えにおいて、第4制御部は、セッティング当初の最初のワークに対する研削加工では、仮の研削開始位置S0′から砥石を最初のワークに対して相対移動させながら当該最初のワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで実際の研削開始位置S0を確定し、セッティング切り替え後の2番目以降の各ワークに対する研削加工では、実際の研削開始位置S0から砥石をワークに対して相対移動させながら当該ワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石を実際の研削開始位置S0まで移動させるプロセスが繰り返される。
図1(a)及び図2(a)には、本実施形態の研削加工技術を実現するための研削加工盤の構成が示されている。研削加工盤は、ワーク2に研削加工を施す砥石4と、砥石4をワーク2に対して相対的に移動させる砥石制御システムNCと、を有している。この場合、砥石4は、クイルタイプの支持軸6(切込軸、サーボ軸ともいう)に支持されており、支持軸6は、砥石制御システムNCによって制御される研削盤本体8に組み込まれている。
(2)ワーク2が外輪の場合、外輪溝の直径の寸法ズレ
(3)砥石4の直径WDの測定誤差によるズレ
(4)クイルタイプの支持軸6の傾斜量(ベンディング量)によるズレ
(5)一対のシューでワーク2を保持する場合、当該シューの磨耗によるズレ
(6)一対のシューでワーク2を保持する場合、当該シューの研磨精度のズレ
S0′=ID-WD-S4-Sα
4 砥石
6 支持軸(切込軸、サーボ軸)
CP 支持軸のセンター位置(中心)
ID 研削加工前のワークの直径(内径)
WD 砥石の直径
S4 研削完了位置
S0 実際の研削開始位置
S0′ 仮の研削開始位置
Sα 余裕量
Claims (8)
- ワークに研削加工を施す砥石と、前記砥石をワークに対して相対的に移動させる砥石制御システムと、を有する研削加工盤であって、
前記砥石を支持する支持軸のセンター位置を基準に、研削加工前の最初のワークの直径ID、砥石の直径WD、研削加工後の最初のワークの研削完了位置S4、および研削加工前の2番目以降の各ワークに対する砥石の実際の研削開始位置S0に基づき、最初のワークに対する砥石の仮の研削開始位置S0′を演算によって設定する第1制御部と、
第1制御部で設定された仮の研削開始位置S0′に砥石を位置決めする第2制御部と、
仮の研削開始位置S0′から砥石を最初のワークに対して相対移動させながら、当該最初のワークに研削加工を実行する第3制御部と、
研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石を、S4に相当する距離だけ最初のワークから離間させることで、実際の研削開始位置S0を確定する第4制御部と、を備えており、
第1制御部が、仮の研削開始位置S0′を、実際の研削開始位置S0との間に所定の余裕量Sαを考慮して、
S0′=ID-WD-S4-Sα
なる演算によって設定することを特徴とする研削加工盤。 - インプロセスゲージは、最初のワークの直径を計測することで、当該最初のワークの研削加工状態を検出し、
第4制御部は、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで、実際の研削開始位置S0を確定することを特徴とする請求項1に記載の研削加工盤。 - 余裕量Sαは、研削加工開始時に砥石を最初のワークに対向配置した際に生じる誤差量を考慮して設定されることを特徴とする請求項1又は2に記載の研削加工盤。
- あるワークに対する研削加工のためのセッティングと、他のワークに対する研削加工のためのセッティングとの切り替えにおいて、第4制御部は、
セッティング当初の最初のワークに対する研削加工では、仮の研削開始位置S0′から砥石を最初のワークに対して相対移動させながら当該最初のワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで実際の研削開始位置S0を確定し、
セッティング切り替え後の2番目以降の各ワークに対する研削加工では、実際の研削開始位置S0から砥石をワークに対して相対移動させながら当該ワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石を実際の研削開始位置S0まで移動させるプロセスが繰り返されることを特徴とする請求項1~3のいずれか1項に記載の研削加工盤。 - ワークに研削加工を施す砥石と、砥石をワークに対して相対的に移動させる砥石制御システムと、を有する研削加工盤を用いた研削加工方法であって、
砥石を支持する支持軸のセンター位置を基準に、研削加工前の最初のワークの直径ID、砥石の直径WD、研削加工後の最初のワークの研削完了位置S4、研削加工前の2番目以降の各ワークに対する砥石の実際の研削開始位置S0とし、最初のワークに対する砥石の仮の研削開始位置S0′を演算によって設定する第1工程と、
第1工程で設定された仮の研削開始位置S0′に砥石を位置決めする第2工程と、
仮の研削開始位置S0′から砥石を最初のワークに対して相対移動させながら、当該最初のワークに研削加工を実行する第3工程と、
研削完了位置S4近傍で、砥石をS4に相当する距離だけ最初のワークから離間させることで、実際の研削開始位置S0を確定する第4工程と、を有しており、
第1工程において、仮の研削開始位置S0′は、実際の研削開始位置S0との間に所定の余裕量Sαを考慮して、
S0′=ID-WD-S4-Sα
なる演算によって設定されることを特徴とする研削加工方法。 - インプロセスゲージによって最初のワークの直径を計測することで、当該最初のワークの研削加工状態が検出されており、
第4工程において、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで、実際の研削開始位置S0を確定することを特徴とする請求項5に記載の研削加工方法。 - 余裕量Sαは、研削加工開始時に砥石を最初のワークに対向配置させた際に生じる誤差量を考慮して設定されることを特徴とする請求項5又は6に記載の研削加工方法。
- あるワークに対する研削加工のためのセッティングと、他のワークに対する研削加工のためのセッティングとの切り替えにおいて、第4工程では、
セッティング当初の最初のワークに対する研削加工では、仮の研削開始位置S0′から砥石を最初のワークに対して相対移動させながら当該最初のワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石をS4に相当する距離だけ最初のワークから離間させることで実際の研削開始位置S0を確定し、
セッティング切り替え後の2番目以降の各ワークに対する研削加工では、実際の研削開始位置S0から砥石をワークに対して相対移動させながら当該ワークに研削加工を実行し、研削完了位置S4近傍で、インプロセスゲージからのゲージ信号に基づいて、砥石を実際の研削開始位置S0まで移動させるプロセスが繰り返されることを特徴とする請求項5~7のいずれか1項に記載の研削加工方法。
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CN106217154B (zh) * | 2016-07-01 | 2018-04-20 | 哈尔滨汽轮机厂有限责任公司 | 一种半联轴器工作面精准磨削方法 |
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