BS 7707-1993 Specification for power presses mechanical straight-sided single-action type from 400 kN up to and including 4000 kN nominal force《400kN-4000kN(含40000kN)公称力机械直边单作用型机动压.pdf

1、BRITISH STANDARD BS 7707:1993 ISO 9188:1993 Specification for Power presses, mechanical straight-sided single-action type of from400kN up to and including4000 kN nominal force UDC 621.979BS7707:1993 This British Standard, having been prepared under the directionof the Machine, Engineers and Hand Too

2、ls Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15October1993 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MTE/1 Draft for comment 89/75151 DC ISBN 0 580 22579 8 Committees responsible

3、for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tool Standards Policy Committee (MTE/-) to Technical Committee MTE/1, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Associated

4、Offices Technical Committee Cold Rolled Sections Association Cranfield Institute of Technology Health and Safety Executive Independent Engineering Insurers Committee Machine Tool Technologies Association Metal Forming Machinery Makers Association Ministry of Defence Trades Union Congress Coopted mem

5、bers Amendments issued since publication Amd. No. Date CommentsBS7707:1993 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Definitions 1 3 Characteristics and dimensions 1 Annex A (informative) Bibliography Inside back cover Figure 1 Typical con

6、struction of a press 2 Table 1 3 Table 2 3 Table 3 3 Table 4 3 Table 5 4 Table 6 4 Table 7 4 Table 8 4BS7707:1993 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO

7、9188:1993 Machine tools Straight-sided single-action mechanical power presses from400kN up to and including4000kN nominal force Characteristics and dimensions, prepared by Technical Committee ISO/TC39 Machine tools and published by the International Organization for Standardization (ISO). ISO9188 is

8、 based on recommendation number8 published by the European Power Press Manufacturers Panel (EPPMP) (Secretariat AMTRI, Macclesfield) which was established in1967 by power press manufacturers sponsored by the machine tool associations of the following countries: Belgium, Denmark, France, Federal Germ

9、any, Great Britain, Italy, Netherlands, Portugal, Spain, Sweden and Switzerland. The Netherlands withdrew from the panel in January1971. Typographical error. In line2 of note2 toTable 4 “pour” should read “for”. A British Standard does not purport to include all the necessary provisions of a contrac

10、t. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover

11、and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS7707:1993 BSI 10-1999 1 1 Scope This International Standard specifies the characteristics and dimensions of straig

12、ht-sided single-action mechanical power presses from400kN up to and including4000kN nominal force. It applies to machines intended for single or continuous operation and to geared or ungeared 1-, 2- or4-point machines. 2 Definitions For the purposes of this International Standard, the following defi

13、nitions apply. 2.1 nominal force, F n maximum allowable pressing force which may act, before the bottom of stroke, through a given distance the nominal force travel h n(see2.7), as frequently as required without damaging the press 2.2 bed cushion force, F t force related approximately to the nominal

14、 force, at an air pressure of0,5MPa, as follows: F t. 0,2F n 2.3 slide knockout force, F k force related approximately to the nominal force as follows: F k. 0,1F n 2.4 nominal energy, W n energy output obtained during a slide stroke in continuous operation. It is related to a given reduction in the

15、flywheel speed of rotation the nominal energy W nis related to the nominal force F n(see2.1) and to the nominal force travel h n(see2.7) and, where a cushion is used, to the bed cushion force F t(see2.2) as well as to that part of the cushion travel h twhich can be utilized with maximum cushion forc

16、e the nominal energy is selected according to the type of work for which the press is required 2.5 shut height, e 1 distance from the bedplate surface to the slide surface measured with the maximum variable stroke, stroke down and slide adjustment up since in general the shut height is adjusted by t

17、he use of sub-bolsters or packers, it is useful to specify values in accordance with an arithmetic progression in preferred steps of100mm 2.6 bed to slide distance, e 2 distance from the bed surface to the slide surface measured with the maximum variable stroke, stroke down and slide adjustment up 2

18、.7 nominal force travel, h n maximum distance, above the bottom of the stroke of the slide, from which point downwards the nominal force F nmay act as frequently as required without damaging the press the nominal force travel h n , together with the nominal force F n , indicate the rating of the dri

19、ve the nominal force travel is not directly related to the nominal energy W n 3 Characteristics and dimensions Mechanical single-action straight-sided power presses may be provided with a crank, eccentric, toggle or knuckle-joint drive mechanism. Figure 1 shows a typical construction of a straight-s

20、ided single-action mechanical power press; this figure is a schematic representation only and is not intended to affect the manufacturers design. The characteristics and dimensions shall be selected fromTable 1 toTable 8; values given in parentheses are non-preferred. Manufacturers are free to choos

21、e those combinations of characteristics and dimensions to best suit their own requirements. The nominal pressure is the gauge pressure and is above atmospheric pressure (see ISO2944:1974, Fluid power systems and components Nominal pressures). To allow tool interchangeability, the pitch p of slide kn

22、ockouts shall be225mm. The number of slide knockouts is dependent on the machine design.BS7707:1993 2 BSI 10-1999 Figure 1 Typical construction of a pressBS7707:1993 BSI 10-1999 3 Table 1 Table 2 Table 3 Table 4 Force in kilonewtons Nominal force, F n a(see2.1) 400 630 (800) 1 000 (1 250) 1 600 (2 0

23、00) 2 500 (3 150) 4 000 Bed cushion force, F t b(see2.2) 80 125 160 200 250 315 400 500 630 800 Slide knockout force, F k(see2.3) 40 63 80 100 125 160 200 250 315 400 a The preferred values correspond to the R5 series of preferred numbers. b At an air pressure of0,5MPa. Energy in kilojoules 1,25 1,6

24、 2 2,5 3,15 4 5 Nominal energy, W n a(see2.4) 6,3 8 10 12,5 16 20 25 31,5 40 50 63 80 100 125 160 NOTE 1The values given are those most frequently used in practice. NOTE 2The number of strokes per minute and the reduction in the flywheel speed shall be specified, together with the nominal energy. a

25、Values correspond to the R10 series of preferred numbers Bedplate and slide width, (left to right), x 0 a mm 630 800 1 000 1 300 1 600 1 900 2 200 2 500 2 800 3 100 Pressure pin plate width, x 2 b mm 700 1 000 1 300 1 600 1 900 2 200 2 500 2 800 Pressure pin rows, r x 5 7 9 11 13 15 17 19 a Values i

26、n accordance with an arithmetic series for hole spacings for pressure pins of150mm. For values greater than1000mm, the preferred step is300mm. b Values related to the bedplate and slide width x 0 . The values for x 2are found from the relationship x 2(r x 1) 150 + 100 for r x= 5, 7, 9. Bedplate and

27、slide depth (frontto back), y 0 a mm 500 630 800 1 000 (1 500) 1 300 (1 450) 1 600 (1 750) 1 900 2 200 Pressure pin areadepth, y 2 b mm 700 700 1 000 1 000 1 300 1 300 1 600 1 900 Pressure pin rows, r y 5 5 7 7 9 9 11 13 Upright opening width, y 3 c mm 250 315 400 550 550 550 700 850 1 000 1 150 1 3

28、00 a Values in accordance with an arithmetic series for hole spacings for pressure pins of150mm. For values greater than1000mm, the preferred step is300mm. b Values related to the bedplate and slide depth y 0 . The values for y 2are found from the relationship y 2= (r y 1) 150 + 100 pour r y= 5, 7,

29、9,. c The upright opening is not intended for tool removal.BS7707:1993 4 BSI 10-1999 Table 5 Table 6 Table 7 Table 8 Dimensions in millimetres Shut height, e 1(see2.5) 300 400 500 600 700 800 Slide adjustment, h v a 75 100 125 150 175 200 Upright opening height, Z b Z = e 1 h v a As this results in

30、a reduction in the shut height, it is useful to associate it with the shut height in steps of25mm. b The upright opening is not intended for tool removal. The height Z of the upright opening should not exceed the minimum shut height. Dimensions in millimetres Bedplate thickness, s a 75 100 125 150 1

31、75 200 a Depends on the size of the pressure pin area (bed opening), the nominal force and the required deflection characteristics. An arithmetic progression is selected in preferred steps of25mm. Dimensions in millimetres Slide stroke, H a 80 100 125 160 200 250 315 400 (450) 500 Bed cushion travel

32、, h t b 40 40 63 63 100 100 125 125 160 160 Slide knockout travel, h k c 16 20 25 32 40 50 63 80 90 100 a The preferred values correspond to the R10 series of preferred numbers. b When dimensioning the nominal energy W n , that part of the cushion travel through which the cushion force acts shall be

33、 additionally specified. c The slide knockout travel h kis equal to h k. 0,2H Dimensions in millimetres Nominal force travel, h n(see2.7) 3,5 7 12,5 25BS7707:1993 BSI 10-1999 Annex A (informative) Bibliography 1 ISO 6898:1984, Open front mechanical power presses Capacity ratings and dimensions. 2 IS

34、O 8540: , Open front mechanical power presses Vocabulary 1) . 3 ISO 9189:1993, Machine tools Straight-sided high-speed mechanical power presses from250kN up to and including4000kN nominal force Characteristics and dimensions. 1) To be published.BS 7707:1993 ISO 9188:1993 BSI 389 Chiswick High Road L

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