WO2004037531A1 - プレス成形方法 - Google Patents
プレス成形方法 Download PDFInfo
- Publication number
- WO2004037531A1 WO2004037531A1 PCT/JP2003/012940 JP0312940W WO2004037531A1 WO 2004037531 A1 WO2004037531 A1 WO 2004037531A1 JP 0312940 W JP0312940 W JP 0312940W WO 2004037531 A1 WO2004037531 A1 WO 2004037531A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drive source
- speed
- slide plate
- delay
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
- B30B15/20—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/14—Control arrangements for mechanically-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
- B30B1/186—Control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
Definitions
- the present invention relates to a press forming method in which a slide plate (pressing plate) is driven by a plurality of driving sources (for example, servo motors), and the slide plate is kept horizontal using a press machine for press forming.
- driving sources for example, servo motors
- the press used to press-mold a work is such that a fixed plate and a slide plate are arranged facing each other, and a fixed mold is placed on the fixed plate between them, and a slide plate is placed on the slide plate facing the fixed plate.
- a movable mold is provided, and the slide plate is moved with respect to the fixed plate to open and close the movable mold with respect to the fixed mold.
- one drive source is mounted in the center of the slide plate. When the slide plate is large, simply attaching one drive source to the center of the slide plate cannot uniformly press the slide plate.
- a plurality of drive sources are used so that a uniform force can be applied to the slide plate, and each drive source presses each of the engagement points arranged on the slide plate to create a pressing surface.
- each drive source presses each of the engagement points arranged on the slide plate to create a pressing surface.
- the load on the drive source delays the rotation of the servo motor. Therefore, the drive source applied with a large load has a slower advance than the drive source applied with a small load, and the slide plate is inclined with respect to the fixed plate. S Since the inclination of the ride plate causes the inclination of the mold, the mold is often damaged. If the inclination is small, the mold will not be damaged, but it may still reduce the molding accuracy of the workpiece.
- the inclination of the slide plate is detected and measured, and the drive signal supplied to each drive source is changed and adjusted so as to eliminate the inclination of the slide plate.
- a fix has been made. If molding is performed while performing such feed pack control, it is possible to prevent the slide plate from tilting during molding. However, if molding is performed with feedback control to eliminate the inclination of the slide plate, it takes a long time per molding. When press forming a work, it is common practice to form a large number of works by repeatedly forming the same type of work. If the time per molding cycle is long, there is a problem that it takes an extremely long time to produce a large number of workpieces. Disclosure of the invention
- an object of the present invention is to provide a molding method capable of performing pressure molding at a high molding speed suitable for mass production while maintaining the horizontal state of a slide plate.
- the present invention has been made based on the finding that the delay of the slide plate during the forming is a function of the load from the work applied to the slide plate.
- a press forming method includes: a fixed plate; a slide plate that is disposed to face the fixed plate and that can move with respect to the fixed plate; and a servo for driving the slide plate.
- a press machine having a plurality of driving sources using motors, and each of the driving sources presses a plurality of engagement points arranged on a slide plate so as to be able to pressurize in a plane, is used.
- the speed of each drive source (referred to as “compensation speed”) required to eliminate the delay of each drive source with respect to the reference drive source, And a load to determine based on a function representing the delay from the indicated displacement, Based on the compensation speed, each drive source is moved to perform trial molding of a workpiece, and the delay of each drive source is measured during the trial molding,
- the trial speed shaping is repeated by correcting the compensation speed until the delay of the other drive source with respect to the reference drive source is equal to or less than a predetermined value.
- the actual press forming is performed at the speed of each drive source determined above.
- the reference driving source is a driving source that exerts a minimum load on its displacement among a plurality of driving sources.
- the compensation speed (V n) for a certain drive source (n) is defined as V f + ⁇ V n (where the target speed of the V f reference drive source, AV n: speed and load) (Compensation speed calculated based on the function representing the delay, the increment from the target speed Vf of the reference driving source), and each driving source is calculated using 50 to 90% of the calculated increment. It is preferable to perform trial molding by moving.
- the load acting on each drive source can be determined by trial molding, measured during the molding, or determined by simulation.
- FIG. 1 is a front view of a press machine that can be used in the present invention.
- FIG. 2 is a plan view showing the press of FIG. 1 with a part of an upper fixing plate cut away.
- FIG. 3 is a control system diagram of a press machine that can be used in the present invention.
- FIG. 4 is a flowchart showing a press molding method according to one embodiment of the present invention.
- FIG. 5 is a graph showing an example of the relationship between displacement and delay.
- BEST MODE FOR CARRYING OUT THE INVENTION First, an example of a press machine that can be used in the present invention will be described with reference to FIG. 1 and FIG.
- FIG. 1 is a front view of the press
- FIG. 2 is a plan view of the press.
- the upper support plate is partially removed.
- Press machine is lower support
- the support 10 is fixed on the floor, and the upper support plate 30 is held by the support 20 erected on the lower support.
- a slide plate 40 that can reciprocate along the column 20 is provided between the lower support 10 and the upper support 30.
- a molding space is provided between the slide plate and the lower support. There is.
- a fixed die for press (lower die) 81 is mounted on the lower support base, and a movable die (upper die) 82 corresponding to the fixed die is mounted on the lower surface of the slide plate.
- a molding plate is inserted between these two dies to perform molding.
- the upper support plate 30 is provided with four drive sources 60a, 60b, 60c, and 60d each having a combination of a thermomotor and a reduction mechanism.
- the drive shafts 61a, 61b, 61c, 61d extending downward from each drive source pass through holes formed in the upper support plate 30, and the upper surface of the slide plate 40.
- a ball screw is attached to the drive shaft to convert the rotation into vertical movement.
- the rotation of the servomotor moves the slide plate up and down.
- Each drive source, drive shaft, and engagement portion constitute a drive mechanism.
- a drive source is arranged.
- these driving sources generate the same amount of pressing force, that is, they have the same output.
- Each engaging portion 62a, 62b, 62c, 62d is provided in the molding area of the molding space as is apparent from the plan view of FIG.
- the displacement measuring devices 50a, 50b, 50c, and 5Od are provided near the engaging portions 62a, 62b, 62c, and 62d, respectively.
- Displacement measuring devices 50a, 50b, 50c, and 50d are provided with magnetic scales 51 with magnetic graduations, and magnetism provided opposite to the magnetic scales with a small gap.
- a sensor having a magnetic sensor 52 such as a pad can be used. By moving the magnetic sensor 52 relative to the fixed magnetic scale 51, its absolute position, displacement speed, and the like can be measured.
- a displacement measuring device that measures the position by light or sound waves can also be used.
- Displacement measuring device 50a, 50b, 50c, 50d The air scale 51 is mounted on the reference plate 70, and the magnetic sensor 52 of the displacement measuring instrument is mounted on the support 5 mounted on each of the engaging portions 62a, 62b, 62c, 62d. Supported by three.
- the reference plate 70 is held at the same position regardless of the position of the slide plate 40. Therefore, when the slide plate 40 is driven by the driving sources 60a, 60b, 60c, 60d, the displacement measuring devices 50a, 50b, 50c, 5 The displacement of each engagement portion can be measured by 0d.
- the reference plate 70 is provided with a gap below the upper support plate 30 and is fixed between the columns 20 while each drive shaft 6 1 a, 6 1 b, 6
- the portion through which 1c and 61d passes is provided with a through hole 71 with a sufficient diameter so that the reference plate is not affected by deformation of the drive shaft and slide plate. ing.
- a load measuring device 55a, 55b, 55c, 55d is provided between each engaging part 62a, 62b, 62c, 62d between the slide plate 40 The load applied to the slide plate can be measured at each engagement part.
- Fig. 3 shows the control system diagram of the press.
- the control means 92 has a CPU, and a drive signal is sent from the control means 92 to the drive sources 60a, 60b, 60c, 60d via the interface 94.
- the molding is performed by driving each drive source.
- a displacement signal of the slide plate is sent to the control means 92 from the displacement measuring devices 50a, 50b, 50c, 50d.
- the load applied to the slide plate measured by each of the load measuring devices 55a, 55b, 55c and 55d is sent to the control means 92.
- FIG. 4 is a flowchart illustrating a press forming method according to an embodiment of the present invention.
- step 1 of the flowchart trial molding of the work is performed, and the load applied to each drive source 60a, 60b, 60c, 60d mounted on the slide plate 40 during that time is measured.
- C to determine the load applied to the drive source at each displacement of the slide plate, i.e., to supply a drive signal to each drive source 60a, 60b, 60c, 60d to rotate the servomotor.
- slide plate 40 is lowered.
- the load on the slide plate changes. Therefore, slide plate 4 0 tries to tilt.
- the displacement of the sliding plate is measured by a displacement measuring device 50a, 50b, 50c, 50d mounted near the drive source, and the progress of each drive source can be determined. Therefore, the advance of the drive source that is delayed is accelerated. Move the slide plate horizontally at the same position where each drive source is installed. While doing so, lower the entire slide plate. By repeating this, the slide plate is lowered until the molding is completed, and when the molding is completed, the slide plate is raised to the original position, and one cycle of the trial molding is completed.
- the displacement of the slide plate and each drive the load applied to the source is measured by the load measuring instrument 5 5 a N 5 5 5 b, 5 5 c, 5 5 d, and stores the load applied to the displacement and the drive source when the it to the storage device 9 3, displacement Create a relation table between the and the load in the storage device.
- the respective drive sources 60a, 60b, 60c, 60d the load applied to the P a i, P b i, P c i, and Pdi.
- the respective loads when the slide plate descends to the displacement J2 are defined as Pa2, Pb2, Pc2, and Pd2. Molding go advances Pam respective load when the displacement J m of the slide plate, Pbm, P cm, and Pdm. Table 1 shows the relationship between these displacements and the load applied to the drive source.
- the drive sources 60a, 60b, 60c, 60d on the slide plate have the slowest lead of the drive source 60c, as shown in Fig. 5.
- Is ⁇ c, and the delay of the driving source 60 a is the smallest and the delay is ⁇ a.
- the vertical axis indicates the indicated displacement
- the horizontal axis indicates the delay ⁇ of the actual displacement of the slide plate near the respective drive source from the indicated displacement.
- Indicated displacement- At ⁇ , there is no relative delay between the driving sources, at, the relative delay is the maximum, and at ⁇ + i, there is no relative delay.
- the load of the drive source 60a is the smallest among the loads applied to the drive source, and the delay of the displacement is also minimum, so this drive source is used as the reference drive source.
- each drive source is calculated using the loads P am , Pbm, Pcm, Pdm applied to each drive source 60 a, 60 b, 60 c, 60 d and the target speed V f of the drive source 60 a.
- the speed Vn (n: a, b, c) of each drive source n that can make the delay of the drive source 60a equal to the delay ⁇ min of the drive source 60a is determined.
- the speed V n of the drive source delay [delta] eta driving source n is ing the same as the delay [delta] min of the drive source 6 0 a is determined by the following .
- step 3 trial molding of the work is performed using the speeds of the respective drive sources obtained in this way.
- Velocity V n obtained above with respect to the drive source n may be said that the addition of incremental AV n speed to the target speed Vf of the reference drive source.
- the obtained speed Vn is slightly reduced.
- the speed increment is calculated here, it is dangerous to apply it to the press as it is, so it is better to use a slightly smaller value.
- the drive source with the smallest load is used as the reference drive source, but another drive source can be used as the reference. It should be noted that the increment ⁇ may be negative if another drive source is used as a reference.
- each drive source is measured during the trial molding in step 3, and the maximum value ⁇ ⁇ of the delay of each drive source ⁇ is determined in step 4, and the minimum value is ⁇ ⁇ .
- the difference is compared with the minimum value [delta] min of the maximum delay [delta] eta and maximum delay [delta] eta each drive Dogen eta is larger than a predetermined value a step 5, use earlier in Step 6 correct compensation increment AV n which had Osamu, repeat steps 3, 4, 5.
- the value for comparing the difference between ⁇ ⁇ and S min must be such that the mold does not become loose (eg, ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ or less). It is preferable that the determination criterion be 1 ⁇ or less, specifically about 3 / zm.
- Step 5 is compared with the minimum delay value [delta] min of the maximum delay [delta] eta and maximum delay of each of the drive sources n, if the difference is less than or equal to the predetermined value alpha, go to Step 7
- the actual molding of the workpiece can be performed using the speed of each drive source obtained in the previous cycle.
- one cycle of press forming takes time.
- the speed of each drive source is determined so that the slide plate can be kept horizontal and the actual molding is performed, a high descent speed suitable for the actual molding can be used.
- the molding can be performed in a short time while keeping the slide plate horizontal.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03751397.5A EP1555117B1 (en) | 2002-10-23 | 2003-10-09 | Press forming method |
| CA002495920A CA2495920C (en) | 2002-10-23 | 2003-10-09 | Press forming method |
| HK06103713.4A HK1083609B (en) | 2002-10-23 | 2003-10-09 | Press forming method |
| US10/524,321 US7165490B2 (en) | 2002-10-23 | 2003-10-09 | Press forming method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002-307935 | 2002-10-23 | ||
| JP2002307935A JP4246470B2 (ja) | 2002-10-23 | 2002-10-23 | プレス成形方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004037531A1 true WO2004037531A1 (ja) | 2004-05-06 |
Family
ID=32170954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/012940 Ceased WO2004037531A1 (ja) | 2002-10-23 | 2003-10-09 | プレス成形方法 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7165490B2 (ja) |
| EP (1) | EP1555117B1 (ja) |
| JP (1) | JP4246470B2 (ja) |
| KR (1) | KR100748013B1 (ja) |
| CN (1) | CN1305662C (ja) |
| CA (1) | CA2495920C (ja) |
| TW (1) | TWI228449B (ja) |
| WO (1) | WO2004037531A1 (ja) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4995415B2 (ja) * | 2004-09-09 | 2012-08-08 | 株式会社放電精密加工研究所 | プレス装置 |
| ES2452022T3 (es) * | 2006-02-06 | 2014-03-31 | Abb Research Ltd. | Sistema de línea de prensas y método |
| US10828858B2 (en) * | 2007-03-23 | 2020-11-10 | Gpcp Ip Holdings Llc | Servo-driven forming press |
| JP5799848B2 (ja) * | 2012-02-21 | 2015-10-28 | トヨタ自動車株式会社 | 多段プレス装置及び多段プレス方法 |
| JP6067397B2 (ja) * | 2013-02-01 | 2017-01-25 | トヨタ自動車株式会社 | 多軸サーボプレス装置及び多軸サーボプレス装置の制御方法 |
| US11141767B2 (en) * | 2018-07-30 | 2021-10-12 | Raytheon Technologies Corporation | Forging assembly having capacitance sensors |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10277791A (ja) * | 1997-03-31 | 1998-10-20 | Komatsu Ltd | 複数ポイントサーボプレスの制御装置 |
| JP2000015341A (ja) * | 1998-07-02 | 2000-01-18 | Komatsu Ltd | プレスブレーキのラム制御方法および制御装置 |
| JP2000079500A (ja) * | 1998-03-16 | 2000-03-21 | Yamada Dobby Co Ltd | プレス機のスライド制御装置 |
| EP1240999A1 (en) | 2001-03-15 | 2002-09-18 | Institute of Technology Precision Electrical Discharge Work's | Press forming machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1275892C (en) * | 1986-10-10 | 1990-11-06 | Ronald Ballantyne | Hydraulic cylinder device for platen spacing indication and control |
| US4797831A (en) * | 1986-11-18 | 1989-01-10 | Cincinnati Incorporated | Apparatus for synchronizing cylinder position in a multiple cylinder hydraulic press brake |
| JP2705591B2 (ja) * | 1994-10-04 | 1998-01-28 | 村田機械株式会社 | パンチ駆動制御装置 |
| CN1134351A (zh) * | 1995-04-28 | 1996-10-30 | Aida会田工程技术株式会社 | 机械式压力机 |
| EP0940196B1 (en) * | 1996-10-29 | 2002-05-22 | Komatsu Ltd. | Bending angle correction method and press brake made using the same |
| JP3969850B2 (ja) * | 1998-06-22 | 2007-09-05 | 株式会社小松製作所 | 電動式ベンダの制御方法および制御装置 |
| US6595122B1 (en) * | 1999-09-03 | 2003-07-22 | Komatsu, Ltd. | Slide inclination correcting method and slide inclination correcting apparatus in press machinery |
-
2002
- 2002-10-23 JP JP2002307935A patent/JP4246470B2/ja not_active Expired - Lifetime
-
2003
- 2003-10-02 TW TW092127312A patent/TWI228449B/zh not_active IP Right Cessation
- 2003-10-09 CA CA002495920A patent/CA2495920C/en not_active Expired - Fee Related
- 2003-10-09 CN CNB2003801007366A patent/CN1305662C/zh not_active Expired - Lifetime
- 2003-10-09 EP EP03751397.5A patent/EP1555117B1/en not_active Expired - Lifetime
- 2003-10-09 US US10/524,321 patent/US7165490B2/en not_active Expired - Lifetime
- 2003-10-09 WO PCT/JP2003/012940 patent/WO2004037531A1/ja not_active Ceased
- 2003-10-22 KR KR1020030073705A patent/KR100748013B1/ko not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10277791A (ja) * | 1997-03-31 | 1998-10-20 | Komatsu Ltd | 複数ポイントサーボプレスの制御装置 |
| JP2000079500A (ja) * | 1998-03-16 | 2000-03-21 | Yamada Dobby Co Ltd | プレス機のスライド制御装置 |
| JP2000015341A (ja) * | 1998-07-02 | 2000-01-18 | Komatsu Ltd | プレスブレーキのラム制御方法および制御装置 |
| EP1240999A1 (en) | 2001-03-15 | 2002-09-18 | Institute of Technology Precision Electrical Discharge Work's | Press forming machine |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1555117A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040036585A (ko) | 2004-04-30 |
| TWI228449B (en) | 2005-03-01 |
| EP1555117B1 (en) | 2017-07-12 |
| US20050235844A1 (en) | 2005-10-27 |
| US7165490B2 (en) | 2007-01-23 |
| HK1083609A1 (en) | 2006-07-07 |
| CN1305662C (zh) | 2007-03-21 |
| JP2004141902A (ja) | 2004-05-20 |
| EP1555117A1 (en) | 2005-07-20 |
| CN1694800A (zh) | 2005-11-09 |
| TW200408532A (en) | 2004-06-01 |
| JP4246470B2 (ja) | 2009-04-02 |
| EP1555117A4 (en) | 2011-04-06 |
| CA2495920C (en) | 2009-11-10 |
| CA2495920A1 (en) | 2004-05-06 |
| KR100748013B1 (ko) | 2007-08-09 |
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