FOCUS ON STAMPING
Metal stamping operations
Progressive die stamping – This features a sequence of stamping stations , each with a unique function – it is a strong solution for metal parts with complex geometries and for long runs , because the dies last a long time without becoming damaged , and the process is highly repeatable .
Four-slide , or multi-slide , stamping – This type of stamping involves horizontal alignment and four different slides ( four tools are used simultaneously to shape the workpiece ). No dies are used . This process allows for intricate cuts and complex bends to develop even the most complex parts .
Fine blanking - Also known as fine-edge blanking , this cold-extrusion , single-step process is usually done on a hydraulic or mechanical press , or by a combination of the two . Fine blanking presses operate at higher pressures than those used in conventional stamping operations .
Deep drawing - This is a sheet metal forming process in which a sheet metal blank is radially drawn into a forming die by the mechanical action of a punch . It is a shape transformation process with material retention . The process is considered “ deep ” drawing when the depth of the drawn part exceeds its diameter .
Bruderer ’ s BSTA 25H press . presses as well as on installed presses ( also from other manufacturers ).
Its DSF-TE4 servo transfer presses ( doublecolumn split presses designed for transfer applications ) offer high levels of customisation through multiple configurations . New DSF-NE2 presses are equipped with AIDA ’ s own low-RPM , high-torque servo motor for metalforming applications .
AP & T , with its headquarters in Ulricehamn , Sweden , develops and manufactures production solutions for sheet metalforming and press hardening of steel . Renovating , maintaining and rebuilding press tools is a growing business area .
It also offers servo-hydraulic presses , tandem lines and conventional pressing as well as an automation programme for large destackers and tool design . Its global offering includes complete production lines with presses ; automation ; tools ; heat-treatment systems and services such as maintenance ; spare part provision ; optimisation and rebuilds .
Over the past few years , the company has presented several innovations such as a new production solution for complex parts made from high-strength aluminium . It also helped to deliver ‘ the world ’ s first production line for hot forming of aluminium ’ with a new method , patented by Impression Technologies , dubbed HFQ ®. It has also developed a method , with Sandvik and Cell Impact , for manufacturing fuel cell plates .
AP & T ’ s process monitoring system for press hardening – in-line process monitoring – has also been introduced to the market . AP & T and Nordgren have also unveiled a turnkey system for the quick handling and feeding of different blank formats , without time-consuming gripper changes .
With its TemperBox ®, individually defined areas of press-hardened components can be fully hardened to maximize strength while the other individually defined areas remain soft . This is to achieve desired ductility and / or to facilitate post processing such as joining or mechanical cutting . Machine in a Box , AP & T ’ s automation concept , is aimed at local internal and external integrators . AP & T has also produced a new-generation control system to simplify the use of presses , automation equipment and production lines .
Italian manufacturer Balconi Presseccentriche S . p . A . produces transfer , blanking and servo presses , as well as presses for progressive tools , impact extrusion presses and fin die presses . Its press model 4DMRF- LD-2000 has a 2,000kN cushion and three-axis electronic transfer . The press can produce up to 27 strokes per minute .
Boldrini manufactures hydraulic dished-end presses , flanging machines and manipulators . They feature high speed , including approach , return and , particularly , pressure buildup timing that , it told ISMR , results in a substantial increase in head production .
Swiss stamping specialist , Bruderer AG , offers its BSTA range of presses with press forces from 180 to 2500kN and a stroke speed range of 100 to 2000spm . The lever system distributes the load acting on the ram in the system .
“ This load distribution , the minimal bearing clearances and the efficient lubrication system are the main reasons for the long life and consistently high precision of our stamping presses ,” it told ISMR .
Bruderer employs some 460 people all over the world , 370 of whom work at the Frasnacht site in Switzerland where all its stamping presses are produced . Bruderer UK celebrated its 50th anniversary in 2018 and offers highspeed stamping presses and pre-owned presses as well as other presses , ranging from six to over 4,000 tons . It also offers a range of servo feeders , decoilers , rewinders , welders , conveyors and lubrication equipment .
Taiwanese manufacturer Chin Fong ’ s stamping presses range from 20-ton singlecrank presses and up to 3200 metric tons of capacity to four-point eccentric gear-driven , large panel and multi-stage transfer presses . Forging presses are further diversified by cold , warm and hot forging processes . It has also developed an intelligent single-crank press with a crank mechanism used for blanking , drawing , bending and partial forming . Its straightside double-crank power press , with 400-ton capacity , has a bed area of 2.5m x 1m and can produce metal stampings from material measuring up to 400mm wide and 3.5mm thick
Chin Fong now has offices in Taiwan , China , Indonesia , Malaysia , Thailand and the USA as well as representatives in numerous countries around the world . Its A0 tandem press line for the automotive industry includes stages such as deep drawing , following by trimming , piercing etc .
From a single-press smart solution , the company has moved on to multi-press connections and cloud computing , linking ERP management and even AI computing systems to analyse Big Data . It offers machine selection consulting services , combined
The Chin Fong ST1 series straightside single-crank precision press .