3 Fundamentals of press design

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216 Sheet metal forming and blanking parallelity control cylinder blanking shock damping slide cylinder long side members short side members F PR1 F F F F F center of loading center of loading F N = 5 x F – F PR1 – F PR2 Fig. 4.4.14 Tilt and parallelity control moments in a press for forming side members F U 3/5 F N b controllable moment b a Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998 F U F N controllable moment a F PR2 deactivated cylinders F PR2 F PR2
Sheet metal forming lines 4.4.4 Destackers and blank turnover stations Destackers Destackers separate the blanks and feed them into the press in synchronization with the press cycle. Where low stroking rates are involved, the destacking and feeding operation is performed by feeders. In the case of higher stroking rates, after destacking the blank is transferred onto magnetic belts which transport them into the centering station, for example the pick up position of the press transfer. Destackers with feeder and suction cup tooling In the case of press lines (cf. Sect. 4.4.5) with a stroking rate of about 10 to 12 parts per minute and where suitable blank shapes are being processed, feeder systems are used. In case of a die change, the entire tooling is replaced together with the attached suction cups. During destacking, the tooling suction cups pick up the top blank from a stack. The operation is supported by fanning magnets whose magnetic field fans the top-most blanks in order to prevent the blanks from sticking to each other. The magnets can be positioned manually or automatically near the stack. Both permanent fanning magnets and electrically pulsating magnets are used. When processing non-magnetic materials, e.g. blanks from aluminium or stainless steel, only suction cups can be used. In this case, compressed air is blown in from the side of the stack to enhance the separation of the individual blanks. Destackers with magnetic belts This design is equipped with one or two cylinder-actuated destacking units provided with vacuum cups or magnets (Fig.4.4.15). These are lowered between the magnet belts on the top-most blank of the respective stack, and then raise and transfer the suspended blank to the magnetic belt conveyor. Here, too, fanning magnets are used to support the removal of individual blanks. Using these systems, up to 25 relatively small and up to 15 larger parts per minute can be fed into the press. To ensure that the press is able to operate continuously when changing from one stack to the next, either two destacking stations or systems with a reserve magazine are used. In the case of dual stacking feeders, switchover from the finished to the new stack takes place automatically. Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998 217
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Metal Forming Handbook /Schuler (c)
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123 METAL FORMING Metal Forming Han
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Preface Following the long traditio
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Contributors ADAM, K., Dipl.-Ing. (
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Contents Index of formula symbols .
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Contents 3.6.5 Measures to be under
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Contents 5.3 Component development
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Index of formula symbols � rib an
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Index of formular symbols d inner d
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Index of formular symbols p G avera
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1 Introduction Technology has exert
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Introduction Fig. 1.1 L. Schuler, M
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2 Basic principles of metal forming
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Methods of forming and cutting tech
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2 Basic principles of metal forming
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Basic terms in which � 1 is defor
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Basic terms cation of an exterior f
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Basic terms fracture, this characte
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3 Fundamentals of press design 3.1
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Press types and press construction
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Mechanical presses , distance s[m]
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Mechanical presses stress on the fr
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Mechanical presses stroke [mm] 900
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Mechanical presses This offers a nu
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Mechanical presses or bottom mounte
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Mechanical presses In crossbar tran
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Mechanical presses with a long serv
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Mechanical presses Fig. 3.2.9 Drive
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Mechanical presses Overload safety
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Mechanical presses Slide cushion So
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Mechanical presses imum pneumatic p
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Hydraulic presses Design of the dri
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Hydraulic presses pumps suspended i
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Hydraulic presses pressure in the p
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Hydraulic presses F 4 I P (F ) max
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Hydraulic presses are two variation
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Hydraulic presses presscrown retain
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Changing dies to a weight of 3 t pr
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Changing dies gearwithguidinggroove
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Changing dies are changed in solid
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Changing dies hydraulic clamping me
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Press control systems 3.5.3 Operati
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Press control systems 3.5.4 Structu
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Press control systems The communica
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Press control systems Fig. 3.5.5 PL
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Press control systems Fig. 3.5.7 Sw
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Press control systems Other approac
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Press safety and certification 3.6.
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Press safety and certification with
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Press safety and certification - st
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Press safety and certification Manu
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Press safety and certification pres
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Press safety and certification 3.6.
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Press safety and certification tion
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Casting components for presses Fig.
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4 Sheet metal forming and blanking
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Principles of die manufacture icall
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Principles of die manufacture becau
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Principles of die manufacture go-ah
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Principles of die manufacture produ
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Principles of die manufacture Fig.
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Principles of die manufacture a b c
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Principles of die manufacture the p
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Metal Forming Handbook / Schuler (c
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Principles of die manufacture 0.00
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Principles of die manufacture blank
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Principles of die manufacture how i
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Principles of die manufacture spott
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Deep drawing and stretch drawing me
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Deep drawing and stretch drawing In
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Deep drawing and stretch drawing ac
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Deep drawing and stretch drawing 3
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Page 215 and 216: Coil lines Fig. 4.3.1 Coil line for
Page 217 and 218: Coil lines Fig. 4.3.3 Compact desig
Page 219 and 220: Sheet metal forming lines In the ca
Page 221 and 222: Sheet metal forming lines Fig. 4.4.
Page 223 and 224: Sheet metal forming lines ing of th
Page 225 and 226: Sheet metal forming lines (Fig. 4.4
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Page 243 and 244: Sheet metal forming lines individua
Page 245 and 246: Sheet metal forming lines As early
Page 247 and 248: Sheet metal forming lines In modern
Page 249 and 250: Sheet metal forming lines 4.4.6 Tra
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Page 253 and 254: Sheet metal forming lines Within th
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Page 261 and 262: Sheet metal forming lines Draw cush
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Page 267 and 268: Sheet metal forming lines increase
Page 269 and 270: Sheet metal forming lines (cf. Fig.
Page 271 and 272: Sheet metal forming lines larly str
Page 273 and 274: Sheet metal forming lines ing parts
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Page 279 and 280: Sheet metal forming lines Local ope
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Page 283 and 284: Sheet metal forming lines Table 4.4
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Sheet metal forming lines sion foll
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Blanking processes to complete brea
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Blanking processes Fig. 4.5.5 Top-t
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Blanking processes 56.8% 65.0% 67.4
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Blanking processes a configuration
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Blanking processes flat punch U bev
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Blanking processes Using these equa
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Blanking processes x S = 66. 6 (s a
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Blanking processes 0.18 10 10.36 27
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Shearing lines Fig. 4.6.1 Slitting
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Shearing lines The blanking process
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Shearing lines Blanking presses for
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Shearing lines 4.6.3 High-speed bla
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Shearing lines mass counterbalance
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Shearing lines Fig. 4.6.9 Influence
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Shearing lines Fig. 4.6.11 Rotor an
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Shearing lines Fig. 4.6.13 Complete
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Shearing lines Fig. 4.6.15 Complete
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Shearing lines Fig. 4.6.17 Flexible
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Shearing lines which run, backlash-
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Shearing lines that up to 150 strok
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Shearing lines Fig. 4.6.21 Automati
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Shearing lines Fig. 4.6.24 Passenge
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Shearing lines F F resistance weldi
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Shearing lines In contrast to conve
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Shearing lines The stripper plate i
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Shearing lines Fig. 4.6.32 Examples
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Shearing lines - provision of all i
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Shearing lines Fig. 4.6.35 Machine
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Shearing lines Fig. 4.6.37 Failure
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Shearing lines Structure of the ele
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Shearing lines interference, or whe
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Fine blanking - smaller dimensional
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Fine blanking f i blanking force F
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Fine blanking blanking force F s I
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Fine blanking plate of the die, whi
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Fine blanking case hardening nitrit
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Fine blanking not been soft anneale
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Fine blanking it is also possible t
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Fine blanking Example: We wish to p
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Fine blanking s h S1 tearing E frac
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Fine blanking punches, as well as t
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Fine blanking subsequently quenched
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Fine blanking Fig. 4.7.22 Two-stati
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Fine blanking Blanking plate 2 is l
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Fine blanking 1 2 5 6 3 Fig. 4.7.25
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Fine blanking blankingpunch 1 2 inn
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Fine blanking vee-ring piston diehe
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Fine blanking measuring the pressur
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Fine blanking pallets reach the sta
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Bending Table 4.8.1 gives the small
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Bending Accordingly, the necessary
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Bending Example: You wish to bend a
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Bending F F b or b 2 b ⋅s ⋅R =
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Bending Fig. 4.8.7 Roll forming: ro
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Bending Fig. 4.8.13 Hat sections Fi
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Bending Table 4.8.3: Material coeff
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Bending The roll stand for profile
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Bending frame Fig. 4.8.23 Work shaf
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Bending Fig. 4.8.25 Roller straight
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Bending W W t t W Wma s Fig. 4.8.28
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4 Sheet metal forming and blanking
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Organization of stamping plants Whe
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Organization of stamping plants Tab
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Organization of stamping plants lic
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Organization of stamping plants bat
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Organization of stamping plants Tab
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Organization of stamping plants ele
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Organization of stamping plants une
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5 Hydroforming 5.1 General One of t
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Process technology and example appl
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5 Hydroforming 5.3 Component develo
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Component development a component d
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Component development 100% D D 75%
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Component development Pure expansio
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Die engineering diameter and stroke
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5 Hydroforming 5.5 Materials and pr
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Materials and preforms for producin
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Presses for hydroforming Controllab
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5 Hydroforming 5.7 General consider
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General considerations inward hole
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6 Solid forming (Forging) 6.1 Gener
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General lets that can be produced t
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General Fig. 6.1.4 Examples of coin
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General Table 6.1.1: Comparison bet
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6 Solid forming (Forging) 6.2 Benef
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Benefits of solid forming 6.2.2 Wor
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Benefits of solid forming range”
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Benefits of solid forming sions fro
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Benefits of solid forming Where no
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Materials, billet production and su
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Formed part and process plan requir
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Formed part and process plan 6.4.2
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6 Solid forming (Forging) 6.5 Force
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Force and work requirement d 0 d 2
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Force and work requirement For die
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Force and work requirement The mini
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Force and work requirement dies) (c
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Part transfer There is a broad rang
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Part transfer For cold forming proc
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6 Solid forming (Forging) 6.7 Die d
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Die design wedge adjustment auxilia
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Die design Table 6.7.1: Modular sys
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Die design Fig. 6.7.5 Shearing die
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Die design for radial stress � r
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Die design The off-center applied f
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Die design Table 6.7.4: Heat treatm
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Die design Powder metal-manufacture
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Die design ledeburitic 12 % chromiu
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Die design system integrated into b
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6 Solid forming (Forging) 6.8 Press
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Presses used for solid forming mult
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Presses used for solid forming slid
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Presses used for solid forming Fig.
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Presses used for solid forming duct
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Presses used for solid forming 6.8.
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Presses used for solid forming tati
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Presses used for solid forming adeq
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Presses used for solid forming Embo
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Presses used for solid forming ment
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Presses used for solid forming feed
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Presses used for solid forming hopp
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Presses used for solid forming coin
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Presses used for solid forming Univ
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Presses used for solid forming Meda
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Presses used for solid forming CNC-
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Presses used for solid forming forc
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Index A.S.T.M.-standard 451 abrasio
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Index cylinder -, counterpressure 4
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Index flying shear 288 flywheel 51-
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Index modified top drive 205-207 mo
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Index sand blasting 460 sandwich co
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Index washing/cleaning machine 219
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3 Fundamentals of press design

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