Used Seam Welding Machine for sale (65,264)

Condition: good (used), 2 used water-cooled spot welding machines Technical data: Csdpfxoy Naq Is Ackorc Max. welding output: 23.7 kVA Rated output at 50% duty cycle: 8 kVA Short-circuit current: 8.8 kA Open-circuit voltage in 4 steps: from 2 – 3.2 V Electrode force: 17 – 235 daN Cooling water flow rate: 4 l/min Weight: 85 kg per machine Price: 550,-- EUR net per machine Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel / Germany

Condition: used, Straightening and welding plate made of steel Cjdpfoy N Du Rox Ackjrc Machined steel plate from a tool frame Length: 2980 mm Width: 1380 mm Thickness: 74 mm - solid steel plate - milled surface - 4 rectangular cutouts - plate equipped with several symmetrical bores - 4 bolted towing brackets Net weight: 2175 kg

Condition: used, Spot Welding Machine DALEX Type SL 16 - 2 Machine No. ZZH/N-10183 Year of manufacture: approx. 2002 Rated power at 50% duty cycle: 16 KVA Maximum welding power: 50 KVA Max. throat depth: 500 mm Max. electrode force: 17 - 278 daN Electrode arm Ø 45 mm Electrode holder Ø 25 mm Arm spacing: 150 mm / 300 mm Operating pressure: 1–6 bar Open circuit voltage: up to 3.6 Volt Connected load: 37 kVA Mains connection: 400 Volt, 50 Hz - Weld control MPS 200-003 - Welding cycle triggered via electric foot switch - Water-cooled Crsdpfx Asy N Dukeckec Required space (L x W x H): 1100 x 720 x 1450 mm Weight: 230 kg Very good condition

Condition: ready for operation (used), Year of construction: 2014, ARO PAN 160 spot welding machine, including control cabinet and cooling unit -CE marking -Year of manufacture: 2014 -Welding power max. 328 kVA -Digital display & control cabinet / IBOX control system Codpfx Ajy Umuqsckorc -Cooling unit / water-cooled -Ideal for spot welding of steel / aluminum / stainless steel / titanium -Electrode wear compensation -Modularity: The system allows the integration of different welding heads and electrode arms -Foot switch Dimensions / Complete system L x W x H 2.5 x 2.5 x 1.8 meters / Weight approx. 1000 kg Errors and omissions excepted.

Condition: used, Year of construction: 2021, functionality: fully functional, Handles bi-metal, carbide, wood, and stainless steel blades up to 50 mm wide, with a 6-stage welding current adjustment covering a wide range of blade dimensions and materials. Hydraulic clamping on both sides — operated by foot switches — keeps both hands free for blade positioning and ensures consistent electrode contact at up to 10 kN clamping force. Equipped with the GTR pyrometer option: annealing temperature is set by recipe and monitored contactlessly, ending the cycle automatically for repeatable, operator-independent weld quality. Machine is from 2021, in very good condition, water-cooled, and ready for immediate production use. Make and Model: iDEAL BAS 050-11 Nominal power (50% DC): 4.5 kVA Secondary voltage: 2.6 – 4.4 V (6 stages) Clamping force: 10 kN (hydraulic) Upsetting force max. 2.2 kN Machine weight: approx. 180 kg Clamping: hydraulic, foot switch operation Pyrometer (GTR): yes (temperature display on touch panel) Connection voltage : 380 - 419 V Bi-metal / carbide bandsaws: 6×0.6 – 34×1.1 mm Wood saw blades: 6×0.4 – 50×1.0 mm Stainless steel saw blades: 6×0.4 – 25×0.5 mm Strip blades: 6×0.4 – 30×0.6 mm Strip steel S235JR: max. cross-section 75 mm² Strip steel X5CrNi18-10: max. cross-section 40 mm² Csdsy S Nc Sepfx Ackjrc Pyrometer / GTR: Integrated pyrometer (GTR) enables contactless temperature measurement during the annealing process. Target temperature is stored in the recipe and displayed on the touch panel — the annealing cycle ends automatically when the set temperature is reached, eliminating operator-dependent variables and ensuring repeatable weld quality.

Condition: used, Year of construction: 2011, A well-preserved EMAG laser welding machine with EMAG ultrasonic testing system including Laser Rofin type: DC 060 built in 2009 Without exhaust unit The machine used to weld gears with coupling rings. Diameter 60-80 mm. Weld depth 4-6 mm. Csdpoixxqksfx Ackorc *

Condition: refurbished (used), functionality: fully functional, type of input current: three-phase, input voltage: 380 V, warranty duration: 3 months, type of cooling: water, welding current (min.): 5 A, welding current (max.): 260 A, Rehm Invertig 260 AC/DC Digital – Water-cooled TIG ACDC 3-month warranty Refurbished, tested, serviced, and ready for immediate use Specifications: 5-260 AMP 380 Volt Cedeyzpb Hjpfx Acksrc Water-cooled ACDC Pulse 2/4 Step Pre gas / Post gas Start current / End current Up slope / Down slope Frequency adjustable AC Balance AC Frequency Electode option Including Parweld PRO18 Welding torch, earth work cable with clamp, and gas cable. Visits by appointment only. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Condition: refurbished (used), functionality: fully functional, type of input current: three-phase, input voltage: 380 V, ground cable length: 4,000 mm, warranty duration: 3 months, type of cooling: water, hose package length: 4,000 mm, welding current at 60% duty cycle: 245 A, welding current at 100% duty cycle: 210 A, welding current (min.): 5 A, welding current (max.): 260 A, Rehm Invertig 260 AC/DC Digital – Water-cooled TIG ACDC 3-month warranty Refurbished, tested, serviced, and ready for immediate use Specifications: 5-260 AMP 380 Volt Water-cooled ACDC Pulse 2/4 Step Pre gas / Post gas Start current / End current Up slope / Down slope Cjdpfx Acoywgpaoksrc Frequency adjustable AC Balance AC Frequency Electode option Including Parweld PRO20 Welding torch, earth work cable with clamp, and gas cable. Visits by appointment only. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Condition: new, Year of construction: 2025, functionality: fully functional, machine/vehicle number: CPTXI400, type of input current: three-phase, input voltage: 380 V, ground cable length: 5,000 mm, warranty duration: 24 months, type of cooling: water, hose package length: 10,000 mm, welding current at 100% duty cycle: 400 A, welding current (min.): 30 A, welding current (max.): 400 A, The CPTX machine with inverter technology Industrial machine for simple welding tasks High ignition reliability Infinitely adjustable 100% duty cycle Increased power 30-400 AMP 100% 400 AMP Duty-Cycle including: PRO5000 4 Meter Welding Torch Earth work lead 70mm² 5 meter 10 Meter Interconnection Hose 24 Months warranty Visits by appointment only. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. Codpfjy Tuc Tox Ackerc You always do business with Cjays Lastechniek itself and never with third parties.

Condition: refurbished (used), functionality: fully functional, input voltage: 380 V, ground cable length: 4,000 mm, warranty duration: 3 months, type of cooling: water, welding current at 100% duty cycle: 400 A, welding current (min.): 10 A, welding current (max.): 420 A, For sale: Kemppi Pro Evolution 4200 10-420 AMP (100% 400A) 400 Volt Pulse Double Pulse Synergic Water-cooled 2/4 Step 4 Roller drive Soft start Hot start Down slope Fixed programs Credpfey Tt T Djx Ackjc Program memory Steel – Stainless Steel – Aluminum weldable Refurbished, serviced, and tested Including 2x PRO5000 Welding torches, earth work cable with clamp, and gas cable. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Condition: used, Year of construction: 1993, plate thickness max. 3 mm distance betw. rolls 125 mm throat max. 500 mm weight ca. 500 kg Material thickness at 40 kg/mm² tensile strength: max. 3 mm Working width: 500 mm Working depth: 450 mm Manual adjustment of the upper roller Roller center distance: 125 mm Continuously variable working speed: 3–15 m/min Stop skirt incl. 1 pair of rolls Forward/reverse operation via foot switch Crjdpfxoy Iha Ue Ackoc

Condition: like new (used), Year of construction: 2024, functionality: fully functional, type of input current: three-phase, total height: 345 mm, total width: 219 mm, total length: 568 mm, input voltage: 400 V, ground cable length: 1,000 mm, overall weight: 23 kg, type of cooling: air, electrical fuse: 16 A, welding power (max.): 12 kVA, open-circuit voltage: 50 V, welding current at 60% duty cycle: 220 A, welding current at 100% duty cycle: 180 A, space requirement height: 500 mm, space requirement width: 400 mm, space requirement length: 700 mm, input current: 16 A, continuous power (apparent): 8 kVA, Manufacturer Miller Model STi 270 Main Category Welding Equipment Machine Name / Vehicle Type Industrial Welding Machine Condition Used Functionality Fully Functional Inspection Under Power Yes Description Miller STi 270 industrial welding machine for sale. The unit is fully functional and suitable for professional welding applications. Supports both MMA and TIG welding processes. Compact and durable construction designed for workshop and industrial use. Technical Specifications Input Power 400 V, 16 A, 3-phase, 50/60 Hz MMA Adjustment Range 5–270 A, 20–30.8 V TIG Adjustment Range 5–270 A, 10–20.8 V Duty Cycle at 40% 270 A Duty Cycle at 100% 180 A Open Circuit Voltage 50 VDC (12 VDC)* Welding Processes MMA, TIG Dimensions (H x W x D) 345 × 219 × 568 mm Weight Csdoy Uxwqopfx Ackjrc 23.2 kg Features VDR Lift-Arc Hot-Start Arc-Force

Condition: ready for operation (used), Resistance Welding Machine, Resistance Welder, Meritus RAS 150 VSH, Used Machine Manufacturer: Meritus Type: RAS150VSH, MPW-RW 811-1410 Crsderdf Acjpfx Ackec Overall dimensions: 900 x 1370 x 2450 mm Electrical data: 415 V; 150 kVA; 50 Hz Equipped with light gate Tool water cooling

Condition: ready for operation (used), Year of construction: 2010, functionality: fully functional, type of input current: three-phase, Elumatec VS 750 four-head welding machine with EV850 4-axis CNC cleaning line. The welding machine and cleaner are currently programmed only for SCHÜCO profiles. Profile height range for welding: 30-185 mm Minimum window dimensions for welding: 350 x 350 mm Maximum window dimensions for welding: 2600 x 4000 mm Weld bead limitation: 0.2 mm and 2 mm The welding machine features a touch operator panel based on Windows XP The cleaner is also equipped with an operator panel Online connection is available between the welding machine and the cleaner Cjdpfx Acsx E Rd Dsksrc After welding, automatic transport to the cleaner is provided The cleaner operates in both manual and automatic mode In automatic mode, the rotation station turns the window to each specific corner to be processed by the cleaner. We provide assistance with machine disassembly and loading for transport.

Condition: excellent (used), Year of construction: 2004, Carl Cloos GLC 503 Quinto SD welding machine. A total of 4 units available. Year of manufacture: 2004-2004-1999. Price refers to 1 unit. Cedstkuk Repfx Ackjrc

Condition: excellent (used), functionality: fully functional, WMA WMP 08 Spot Welders in TOP Condition, The unit shows barely any signs of use and has only been operated very occasionally. Air-cooled one-handed spot welding unit for vehicle manufacturing, tank construction, steel cabinet fabrication, sheet metal processing, and the wire industry. - Trouble-free welding of all sheet metals - Galvanized sheets can be welded perfectly thanks to controlled current rise and fall - Air-cooled, equipped for external water cooling - Tools can be easily changed using standardized rotating connectors - Only one plug required for welding current, control cable, and water cooling - Always reproducible welding results thanks to built-in automatic energy control Microprocessor Thyristor Control - Constant current regulation - Continuous process monitoring - Simple and ergonomic operation - All set parameters and process values are visible at a glance - Changes to welding parameters allowed only for authorized personnel - Management of configuration and program settings possible via a central PC WMA WMS 108 Microprocessor Thyristor Control - 7 time settings - 8 program slots - Built-in controller - Automatic mains frequency detection 50/60 Hz - Power outage-proof parameter storage - 'with/without current' toggle at the press of a button Additional configuration parameters (locked for user): - Program selection - Advance contact - Advance contact time - Two-hand lock (check) - Locking start signal - Current flow control - Response threshold - Current flow monitoring - Monitoring time - Current flow control - Power factor adjustment - Delay first half wave External inputs (24V, DC stabilized and switching): - Thermal switch - Thyristor temperature - EMERGENCY STOP - Start 1 - Start 2* - Pressure contact - Program 1* - Program 2* - Pre-stroke ON - Program interruption after hold time (only force) - Two-hand lock (check)* * These functions can be activated or locked via configuration parameters. External outputs (24V, DC unstable ± 20%; + switching, max. 5 W): - Solenoid valve pre-stroke - Solenoid valve welding Codpfxexrb Tgo Acksrc - Relay advance contact - Relay ready for operation Dispatch via freight carrier possible upon prior arrangement. #8407

Condition: used, Year of construction: 1985, functionality: fully functional, machine/vehicle number: PS1/9173/9169/2, type of input current: three-phase, input voltage: 400 V, overall weight: 775 kg, electrical fuse: 105 A, compressed air connection: 5 bar, This Schlatter PS 130 is a robust, industrial spot welding machine renowned for its reliability in metal welding applications. Cjdpfey Snycsx Ackerc

Condition: new, Year of construction: 2025, functionality: fully functional, machine/vehicle number: SWM001, type of input current: DC, nominal power at 50% duty cycle: 37 kVA, input voltage: 380 V, type of cooling: water, overall weight: 230 kg, warranty duration: 24 months, welding power (max.): 75 kVA, total width: 500 mm, total height: 1,620 mm, total length: 950 mm, Spot welder / welding machine with water cooling – 75KVA – adjustable power, resistance, etc., + spare tips Csdpfx Ajyl Sy Ejckerc

Year of construction: 2026, operating hours: 5 h, condition: like new (used), functionality: fully functional, working range: 500 mm, machine/vehicle number: RC-1-0505, CNC Stud Welding Machine RC-1-0505 consisting of: 2-axis system 500 x 500 mm, motor-driven KAH100 welding head and automatic stud feeding system CDP-99 capacitor discharge (CD) welding unit Stud diameter: M3-M8; length range: 8-25 mm Weldable materials: steel, stainless steel, aluminium Crjdey Stahspfx Ackec Fully enclosed housing with pneumatically operated safety door and additional light curtain safeguarding User-friendly control system The RC-1-0505 stud welding system stands out due to its high-quality equipment and a safety enclosure with protective panels and additional light grid. The system includes a CDP-99 stud welding unit using capacitor discharge technology, a fully automatic stud feeder, and a KAH100 welding head. The working area of the machine is 500 x 500 mm. The system is easy to operate and program, even for inexperienced operators. Welding positions can also be set via teach-in procedure using a crosshair laser and handheld control unit. Model: RC-Z-0505 NEW and unused Working area: X 500 mm x Y 500 mm, motor-driven; Z 150 mm, manual External dimensions: L 1016 mm x W 1350 mm x H 1663 mm Travel speed: max 40 m/min Compressed air: 6 bar; storage tank for pressure fluctuations included Power supply: 380 V / 50 Hz, CEE 16 A connection, 2.5 kW

Condition: not inspected (used), functionality: unexamined, total height: 1,000 mm, total width: 800 mm, total length: 1,100 mm, overall weight: 150 kg, No reserve price – guaranteed sale to the highest bidder! By placing a bid, you commit to collecting the items within the period from 23/06/2026 to 26/06/2026! Auction of an ELEKTRA BECKUM electrode welding machine & an oxy-fuel welding unit! MACHINE DETAILS Dimensions (L x W x H): 1,100 x 800 x 1,000 mm Weight: 150 kg Crodpoy D Nqaefx Ackoc Note: The gas cylinders pictured are not included in the scope of delivery. External reference: 17

Condition: used, Year of construction: 2026, functionality: fully functional, type of input current: three-phase, total height: 1,200 mm, total width: 730 mm, total length: 1,200 mm, input voltage: 380 V, ground cable length: 3,000 mm, overall weight: 205 kg, warranty duration: 12 months, type of cooling: water, hose package length: 5,000 mm, input current: 16 A, laser power: 3,000 W, input frequency: 50 Hz, laser wavelength: 1,080 nm, continuous power: 3,000 kW (4,078.86 HP), Equipment: documentation/manual, type plate available, Handheld Laser Welding Machine AIRTECH 3 kW – State-of-the-Art Technology for Efficient Sheet Metal Welding Discover the smart and powerful solution for precision laser welding: the Airtech Handheld Laser Welding System with 3,000 Watt capacity! Ideally suited for demanding sheet metal processing – efficient, safe, and highly versatile. Highlights and Features: - Output power: 3,000 watts for superior weld quality and speed - Laser wavelength: 1080 nm, continuous operation with modulation frequency up to 20 kHz Credpfx Acey R I Tgskec - Handheld laser welding head – ergonomically positioned for comfortable operation - Robust housing and intelligent internal structure for maximum service life - Touchscreen display for intuitive operation - Optional automatic multifunctional wire feeder - Safety features: three-color alarm, safety interlocks, safety mechanism against incorrect operation - Cooling via separate water circuit with 13-liter tank capacity - CE-certified components meeting European standards Your Advantages: - Safe operation thanks to comprehensive safety mechanisms and alarm systems - Flexible applications, including automatic wire feeding and robot integration - Low operating costs and easy maintenance thanks to well-designed technology and durable components

Condition: excellent (used), functionality: fully functional, input voltage: 230 V, ground cable length: 3,000 mm, warranty duration: 3 months, type of cooling: air, welding current (min.): 5 A, welding current (max.): 200 A, For sale: Cjays Tig 200 DC Pulse 5-200 AMP 230 Volt Gas-cooled Cjdpjy Rqh Tsfx Ackerc 2/4 Step Pulse Pre gas / Post gas Up slope / Down slope Start current / End current Elektrode option Steel + Stainless Steel weldable test welding possible Including 4 Meter SR17 welding torch, earht work lead, gas cable, and 3 months warranty. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Condition: new, Year of construction: 2023, OKIO 2000W Automatic 4-Axis Fiber Laser Welding Machine Power: 2 kW Country of Origin: China Number of Axes: 4 Travel in X-axis: 500 mm Travel in Y-axis: 300 mm Travel in Z-axis: 300 mm Worktable Dimensions: 350 mm × 450 mm Travel Speeds: Y-axis: 10 m/min X-axis: 10 m/min Z-axis: 5 m/min Positioning Accuracy: ±0.02 mm 4th Axis: Positioner Rotational Positioning Accuracy: ≤0.05 mm Power Supply: 220 V/380 V Power Requirement: 7.5 kW Machine Dimensions: 500×1400×1900 mm Weight: 280 kg Chiller Welding Source: MAX Mounting Plate, Welding Head Cjdpfxopq Nzao Ackerc Visual CCD Monitoring System – uses a high-resolution camera and monitor to improve welding efficiency and quality The automatic OKIO laser welding machine enables welding of metal components in straight lines, circles, and any arbitrary paths, such as those found in mobile phone housings, mobile phone batteries, sensors, medical devices, and other industries. Laser welding machines use high-energy pulsed lasers to weld objects. High energy and high laser pulse density ensure smooth welds, a narrow weld seam, and a small heat-affected zone.

Condition: used, Year of construction: 2015, functionality: fully functional, machine/vehicle number: MB 0484 / 2014, type of input current: three-phase, continuous power (apparent): 10 kVA, type of cooling: air, total width: 1,119 mm, total length: 2,595 mm, total height: 2,510 mm, overall weight: 1,700 kg, For sale is a capacitor discharge welding system (CD welding system) from the brand GLAMATRONIC, model GKS-S4/12-Q, manufactured in 2015. The system is in good condition and is suitable for industrial welding applications with high process reliability and precise energy output. The system has been regularly maintained and is immediately ready for operation. The control cabinets are equipped with additional air cooling. Technical data: Make / Type: GKS-S4/12-Q Year of manufacture: 06/2015 Csdey Rmk Dspfx Ackerc Rated voltage: 3 x 400 V AC / 50 Hz Control voltages: 230 V AC / 24 V DC Rated power: 10 kVA Welding energy: 4 kJ Welding force: 12 kN Max. supply line fuse: 32 A Frame weight: approx. 1,700 kg Control cabinet weight: approx. 1,000 kg

Condition: used, Year of construction: 2013, machine/vehicle number: 22640M03, For sale: a powerful stationary spot welding machine / resistance welding system from the renowned manufacturer AWL-Techniek. This system is ideally suited for industrial applications, series production, and use in automated production lines and robotic cells. With a high output of 130 kVA, the machine is optimally designed for demanding welding processes in the metal sector. Technical data: Manufacturer: AWL-Techniek Model: BR453K2B Year of manufacture: 2013 Voltage: 400 V Frequency: 50 Hz Phase: 3P + PEN Current: 250 A Power: 130 kVA Weight: approx. 500 kg Equipment: - Stationary spot welding system - Welding tongs with copper electrodes - Rotary table / workpiece holder - Control unit with operator panel - Pneumatic pressure unit - Industrial-grade (heavy duty) design Applications: Cjdpfx Acoy Erp Uskerc - Automotive industry - Metal processing - Series production - Robotic welding / automation lines - Sheet metal processing