1、AN AMERICAN NATIONAL STANDARD Specification and Performance Standard, Power Press Brakes ASME B5.55M-I994 The American Society of Mechanical Engineers 345 East 47th Street, New York, N.Y. 1001 7 Date of Issuance: December 2. 1994 This Standard will be revised when the Society approves the issuance o
2、f a new edition. There will be no addenda or written interpretations of the require- ments of this Standard issued to this Edition. ASME is the regrstered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteri
3、a for American National Standards. The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an oppor- tunity to participate. The proposed code or standard was made available for public review and comment which
4、provides an opportunity for additional public input from industry, academia, reg- ulatory agencies, and the public-at-large. ASME does not “approve,“ “rate,“ or “endorse“ any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any pate
5、nt rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determin
6、ation of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or s
7、tandard. ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol- unteers. No part of this document may be reproduced in any form, in an electronic retrieval system or
8、 otherwise, without the prjor written permission of the publisher. Copyright 0 1994 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. FOREWORD (This Foreword is not part of ASME B5.55M-1994.) Recognizing the need for an industry standard for power press brakes, th
9、e American Society of Mechanical Engineers Committee on Machine Tools and Components (B5) established in February 1990 a technical committee, B5 TC3 I, to develop the first American standard relat- ing to this equipment. In the latter part of February 1990 an organizational meeting was held to devel
10、op this Standard. The make-up of this committee consists of power press brake man- ufacturers, distributors, and users. The technical committees objective was to develop a specification and performance stan- dard for power press brakes. To accomplish this objective, the committee approached this tas
11、k by inviting the North American press brake manufacturers and users to submit basic data relative to the subject of this Standard so the committee could study, determine the variations, and obtain a consensus definition for a standard for power press brakes. This committee has adhered to the ANSI B
12、5.5 IM-I987 Preferred Metric SI units for Machine Tools in the preparation of this Standard. Following approval by ASME, the document was submitted to the American National Stan- dards Institute, and was approved as an American National Standard on August 18, 1994. Suggestions for improvement of thi
13、s Standard are welcomed. They should be addressed to the Secretary, ASME B5 Committee, United Engineering Center, 345 E. 47th St., New York, N.Y. 10017. POWER PRESS BRAKE SAFETY REQUIREMENTS The ASME B5.55M-1994 does not cover safety. Safety requirements for the construction, care, and use of power
14、press brakes are established in the latest edition of the American National Standard B 1 1 .3. . 111 ASME STANDARDS COMMITTEE B5 Machine Tools - Components, Elements, Performance, and Equipment (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS H. Coope
15、r, Chairman P. Stumpf, Secretary COMMITTEE PERSONNEL A. M. Bratkovich, P.E., National Machine Tool Builders Association, McLean, Virginia D. L. Lewis, Kennametal, Inc., Raleigh, North Carolina D. Lovett, U. S. Department of Commerce, National Bureau of Standards, Gaithersburg, Maryland G. R. Rawlins
16、on, P.E., Rawlinson con- trol, foot or PSD; control, pedal (treadle); two hand trip air bending - the forming of sheet or plate using a “V” die where the desired angle is achieved before the work- piece is compressed between the upper and lower tools anti-repeat - that function of the control system
17、 de- signed to limit the press brake to a single cycle (stroke) if the tripping or actuating means is held operated automatic (full) - see continuous burrier - a physical boundary to a hazard base - the basic and primary structure of the machine bed - the stationary member of the press brake that su
18、pports the tooling and other associated equipment (see base) bending - the application of stress concentrated at spe- cific points on the workpiece to permanently turn, press, or force from straight, level, or flat condition to a curved or angular configuration bending, multiple - the forming of two
19、 or more bends in a single workpiece or in two or more workpieces with each cycle of the press brake bending, progressive - the forming of a number of bends in the same or different plane or angles, one after another, on a single workpiece at one station bolster (bolster plute) - the plate(s) attach
20、ed to the bed or slide(s) (ram) having means for attaching die com- ponents bottom bending - the forming of sheet or plate using a “V” die where the desired angle is completed after the workpiece is compressed between the upper and lower tools. Typically requires 3-5 times the tonnage for air bendin
21、g. brake - a mechanism for stopping, slowing, or pre- venting motion caution - see warning closed height - see shut height clutch - an assembly, that when engaged, transmits torque to impart motion from a driving member to a driven member cold working - the plastic deformation of metal with- out the
22、 addition of external heat coining - a method of bottom bending where addi- tional force is applied during the bend to make the work- piece conform to the shape of the upper and lower tools. Typically uses “V” dies with openings of 6 times the material thickness and requires 5-7 times the tonnage fo
23、r air bending. connection (connecting rod) bitman) - the part of the press brake that transmits motion and force from the re- volving crank or eccentric to the slide (ram) continuous (automatic) (fill automatic) - uninter- rupted, multiple cycles (strokes) without intervening stops at the end of an
24、individual cycle (stroke) 11 ASME B5.55M-1994 SPECIFICATION AND PERFORMANCE STANDARD, POWER PRESS BRAKES control, foot - a foot operated mechanism (other than a mechanical pedal) for use with the press brake control system. control, foot pedal (mechanical) - a foot operated le- ver designed to actua
25、te and engage the clutch and dis- engage the brake to cause ram (slide) motion control, hand - a hand operated actuating mechanism for use with press brake control system control, operator - a pushbutton, switch, lever, hand- wheel, or other device activated by the operator which initiates, cycles,
26、controls, or stops motion of the press brake control, presence sensing device (PSD) - a presence sensing device (PSD) used as an actuating means control, (emergency) (master) stop - a control that, when actuated, initiates immediate or controlled stop- ping action of the motion of the press brake co
27、ntrol, stop or return - a control that, when actuated, initiates immediate or controlled stopping action of mo- tion and causes the slide(s) (ram) to return to its initial open position control, two hand - a control arrangement that re- quires the concurrent use of both of the operators hands to ini
28、tiate or continue the press brake cycle (stroke) (see device, two hand control) counterbalance (system) - means provided to balance the reciprocating weight of the slide (ram), drive mem- bers, and slide (ram) attachments cycle (work, machine, or single cycle; single stroke) - a complete movement fr
29、om the initial start position back to the same start position of the press brake slide (ram) which may include loading and unloading die(s) - the tooling used in a press brake for shearing, punching, forming, drawing, or assembling metal or other material die holder - the plate or rail to which the
30、lower portion of the die member is attached die space - the space between the bed and the slide (ram) (see open height, shut height, closed height) dies, bending - dies used in press brakes to perform bending and forming operations on a variety of work- pieces eccentric - the offset portion of the m
31、ain shaft or main gear that governs the distance that the slide (ram) travels ergonomics - the study of the workerlmachine inter- face for the purpose of adapting the workplace, ma- chine, and job to fit the worker feeding - the process of loading or removing material or workpieces into or from the
32、press brake frame - see base gauge, material position - a stop against which the material or workpiece is placed to locate it within the point of operation gap - see throat gibs - the machine members used for guiding the ram (slide) guard - a barrier which prevents entry into the point of operation
33、or other hazard area (zone) guard, cover (excludes point of operation) - see guard Housing - see base inch - to impart momentary motion to the press brake by manual means jog - see inch manual (operation) - the operation of the press brake requiring the operator to initiate and maintain the mo- tion
34、 of the machine during the cycle (stroke) or a portion of the cycle (stroke) by use of the actuating means manufacturer - any builder, reconstructor, modifier, or supplier of the press brake and its component parts mode - the state or condition of the control system which allows specific operations
35、of the press brake operator - an individual who performs production work and who controls the press brake pitman - see connection plate - flat material having dimensions of over 5 mm (7 gauge) thickness and 228 mm (9 in.) or more in width point ofentry - the opening(s) of a press brake through which
36、 the material or workpiece is placed (inserted) for processing point of operation - the location in the press brake where the material or a workpiece is positioned and work is performed programmable logic control - an electronic system which performs logical, decision making, or arithmetic functions
37、 by executing instructions in a specific manner. A PES usually includes input and output elements (ports) and is usually reprogrammabie. punch - the male part of the tool (die) punch, bending - that tooling normally attached to the ram of a bending machine to establish a specific material contour SP
38、ECIFICATION AND PERFORMANCE STANDARD, POWER PRESS BRAKES ASME B5.55M-1994 ram - see slide run - single or continuous cycling (stroking) of a press brake safeguarding - methods for protection of personnel from hazards using guards, safety devices, or safe work procedures safeguarding, safe distance -
39、 a method of workpiece positioning and operator location that eliminates the need for the operator to be in or near the point of operation during the press brake cycle (stroke) screws, shut height adjustment - the screws used to set the shut height of the press brake selector, mode (stroking) (opera
40、ting mode) - one or more means used to establish the press brake operating sequence setup - the,process of adjusting the press brake and the installation and adjustment of work holding devices or tooling and appropriate safeguarding to ensure proper and safe operation of the press brake sheet - flat
41、 material having dimensions less than or equal to 5 mm (7 gauge) thickness and 228 mm (9 in.) or more in width shut height - the distance from the bed to the slide (ram) when the slide (ram) is at the bottom of its stroke (in the closed position) shut height (mechanical) - the distance from the bed
42、to the slide (ram) when the slide (ram) is at the bottom of its stroke (in the closed position) with the ram ad- justment fully retracted single stroke (cycle) capability - a mechanism or con- trol arrangement used to automatically initiate stopping action of the press brake (slide) (ram) at the com
43、pletion of the cycle (stroke) slide (ram) - a linear moving press brake member con- figured to carry a portion of the tooling springback - the opening of the V form angle in a workpiece resulting from the release of the forming pressure and relaxation of the workpiece steel, mild - a nonalloyed ferr
44、ous material with a max- imum tensile strength of 450 MPa (65,000 psi) steel, structural - a nonalloyed ferrous material with a maximum tensile strength of 600 MPa (87,000 psi) stop control, emergency - see control, (emergency) (master) stop stop, top (cycle) (stroke) - an operator control used to s
45、top continuous cycling (stroking) at the end of the cycle (stroke) or at another predetermined point stroke (half cycle) - the distance that the slide (ram) travels from the open to the closed position the move- ment of the slide (ram) from the open to the closed po- sition throat (gap) - an opening
46、 or recess in the frame (hous- ing) to permit the positioning of material or workpieces treadle bar (foot) - the operating bar that extends the full length of the press brake and to which a foot pedal (treadle) may be attached trip (tripping) - the momentary actuation of the press brake control or m
47、echanism to initiate the press brake cycle (stroke) two hand trip - an actuating means that requires con- current use of both hands of the operator to trip the press brake V-Bending - the forming of sheet metal material using a pair of “V” shaped tools that bend the workpiece by applying a three poi
48、nt load 13 SPECIFICATION AND PERFORMANCE STANDARD, POWER PRESS BRAKES ASME B5.55M-1994 APPENDIX B METRIC/ENGLISH CONVERSION TABLES (This Appendix is an integral part of ASME B5.55M-1994 and is placed after the main text for convenience.) (See Table on following page.) 15 r Length Inches to Millimete
49、rs Inches mm 0.001 0.0254 0.005 0.1270 0.010 0.2540 0.01 5 0.3810 0.020 0.5080 0.030 0.7620 0.040 1.01 60 0.050 1.2700 0.060 1.5230 0.070 1.7780 0.080 2.0320 0.090 2.2860 0.100 2.5400 0.125 3.1800 0.250 6.3500 0.500 12.7000 0.750 19.0500 1 .ooo 25.4000 2.000 50.8000 3.000 76.2000 4.000 101.6000 5.000 127.0000 6.000 152.4000 7.000 177.8000 8.000 203.2000 9.000 228.6000 10.000 254.0000 20.000 508.0000 30.000 762.0000 40.000 1016.0000 50.000 1270.0000 100.000 2540.0000 I Millimeters to Inches mm 0.1 0.5 1 .o 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.
