Machine frames and weldments
Base frames, chassis, welded assemblies to drawing.
Parametric model of a typical piece. Your structure is built to your drawing, not to this shape.
What it is
The welded base of a machine: the frame that carries the drive, the bed, the crusher, the press or the screen. Plate and rolled section welded into a stiff box or ladder, then machined so the mounting faces are flat and the bores are true.
This is the product type our welding certificate names first: welded steel structures for construction machines. Frames for mobile crushing and screening plants, chassis for agricultural and forestry machines, and machine beds for OEMs are the bulk of what leaves this bay.
Typical pieces
- Base frames and machine beds with machined mounting faces
- Chassis and subframes for mobile plant
- Gearbox and drive carriers, bearing housings welded from plate
- Welded columns, cross members and outriggers
- Welded assemblies delivered with bolted-on parts fitted
Typical applications
Where a welded frame is the part being bought, rather than something bolted to it.
- Base frames that carry a drive, a gearbox and a bearing housing on machined faces
- Chassis and undercarriage weldments for mobile plant
- Machine beds that have to keep two shafts parallel after welding and machining
- Rotating gantry and portal frames for handling equipment
- Box girders and welded beams loaded in bending rather than at a point
- Sub-frames that carry a bought-in assembly onto a larger machine
What we make
Frames from plate and rolled section, welded and then machined, in the sizes this hall actually turns out.
- Plate cut on the laser to 20 mm and formed on the 400 t press brake, 6 050 mm between the housings
- Rolled section, hollow section and plate welded into ladder, box and portal frames
- Mounting faces, bores and dowel holes machined after welding on the horizontal boring mills
- Frames longer than the machining travel indexed in two settings from one datum
- Stress relief before machining where the drawing calls for it, through a partner
Measured across the 18 pieces of this group in the gallery below: 1.5 to 13.6 m in the longest dimension, and most of them between 2.1 and 5.9 m. The tallest is 3.4 m and the widest 2.6 m.
Those figures are measured from the pieces in the gallery on this page, not a capacity limit. What the machines take is on the capability pages, and anything outside that is agreed per enquiry.
Mass is not published here. It follows the plate thicknesses the drawing sets, and we do not estimate it from a model. Send the drawing and the mass comes back with the quotation.
What we can make
Every figure below is on our machine plates. Frames longer than the machining travels are machined in sections or on the horizontal mill with 8 000 mm of X travel.
| Item | Machine | Figure |
|---|---|---|
| Laser bed | TRUMPF TruLaser 3040 | 2 000 x 4 000 mm |
| Maximum plate thickness, laser | TRUMPF TruLaser 3040 | 20 mm |
| Structural steel, certified thickness (ISO/TR 15608 group 1) | EN ISO 3834-2 scope | up to 40 mm |
| Weld quality level (EN ISO 5817) | EN 1090-2, EN ISO 5817 | level C at EXC2 |
| Robotic welding track | Dual robotic welding station, Daihen FD-B6L | 14 m |
| Horizontal boring mill travel X, Y, Z | TOS Varnsdorf WRD15 | 6 200 x 3 000 x 1 600 mm |
| Rotary table and load | TOS Varnsdorf WRD15 | 1 800 x 2 500 mm, 16 000 kg |
| Spray and curing booth | Polin AC spray and curing booth | 7 900 x 5 000 x 4 890 mm |
Finish
Delivered as welded, or blasted to Sa 2½ and wet-painted in the primer and top coat the drawing specifies. Machined faces are protected for transport.
- Raw steel, as welded · Default finish
- Wet paint, primer and top coat
Materials
S355 where the section carries load, S235 where it does not; both are ISO/TR 15608 group 1 and inside the certified welding scope to 40 mm. Wear plate and stainless inserts are welded in where the drawing specifies them, stainless within the group 8 range of 3 to 16 mm.
- S235 and S355 structural steel, ISO/TR 15608 group 1, welded up to 40 mm under the certificate
- Austenitic stainless steel, ISO/TR 15608 group 8, welded 3 to 16 mm
- Plate, hollow section, angle, channel and flat bar, cut and formed in house
- Material certificates to EN 10204 3.1 when the order asks for them
- Aluminium is outside the certified welding scope and is not offered
Welding
A frame is the case the robotic stations were bought for: long, repeatable fillet runs down a beam, and a 14 m track that lets a long frame be welded in one setting instead of turned and re-clamped. Closures, short runs and anything the arm cannot reach are welded manually to the same qualified procedures.
- MAG 135, manual and robotic; the robotic stations run on a 14 m track
- Welding quality system certified to EN ISO 3834-2, certificate W348721, PQM s.r.o.
- Execution class EXC2 to EN 1090-2 unless the drawing calls for more
- Weld quality level C to EN ISO 5817, the level EN 1090-2 assigns to EXC2
- Procedures to EN ISO 15609-1, qualified to EN ISO 15614-1, welders to EN ISO 9606-1
- Welding coordination by an International Welding Engineer
Surface treatment
Most frames leave as welded or blasted and painted. Machined faces are masked before blasting and painting and protected for transport: a coated face that then has to be re-machined is rework nobody has paid for.
- As welded, deslagged and cleaned, where the drawing asks for nothing more
- Blasting to EN ISO 8501-1 Sa 2½ in the compressed-air chamber, 8 000 x 5 000 x 3 000 mm
- Wet paint in the Polin booth, 7 900 x 5 000 x 4 890 mm, cured at 75 to 80 °C
- Primer and top coat to the system the drawing specifies
- Hot-dip galvanising on request, through a partner; there is no bath in this hall
- Powder coating is not offered
Inspection and documentation
A frame is bought for its geometry, so dimensional inspection carries more weight here than anywhere else on this site. Mounting faces, bore centres and diagonals are measured with the FARO arm against the drawing datum after machining, and the report ships with the part when the order asks for one.
- Visual testing of every weld to EN ISO 17637, assessed against EN ISO 5817
- Dimensional inspection to EN ISO 13920; the tolerance class is agreed on the drawing
- Measurement with a FARO Arm Prime 10 where the drawing needs a report
- Welding procedure specifications and their qualification records with the delivery
- Welder qualifications to EN ISO 9606-1
- Ultrasonic, magnetic particle and penetrant testing on request
- Coating thickness reports on request
What does not ship is an EN 1090-1 declaration of performance. TANAX TRUCKS a. s. publishes no EN 1090-1 factory production control certificate, so this site does not claim one; EN 1090-2 is the execution standard the welding system works to.
What we need from you
A frame is quoted from a drawing, not from a description. What makes a quotation firm rather than indicative:
- The drawing, as PDF, and as STEP, DXF or DWG where you have it
- The material specification, grade by grade
- The weld quality level or the execution class, if the drawing does not carry it
- The finish: as welded, blasted, primed, painted to a system, or galvanised
- The quantity, and whether it is a one-off, a batch or a repeat call-off
- The date you need it on site, and the delivery address
A drawing is enough to quote from. Nothing here needs a specification written first.
The route through the hall
- 01
CNC laser cutting
Plate to 20 mm on a 2 000 x 4 000 mm bed, 3 200 W. Nests are cut from the customer's DXF or from our own unfolds.
- 02
CNC bending
400 t press brake with a 6 050 mm table and 365 mm stroke. Long folds in one hit; cones and boxes for hoppers and housings.
- 03
Welding
MAG 135, manual and robotic. A dual robotic station on a 14 m track and a second robotic cell with 2 008 mm reach, under an EN ISO 3834-2 system with an IWE welding coordinator.
- 04
Machining
Two CNC horizontal boring mills with travels to 6 200 x 3 000 x 1 600 mm and rotary tables to 16 000 kg, a horizontal mill with 8 000 mm of X travel, a CNC lathe, a vertical lathe and gear hobbing.
- 05
Blasting and painting
An 8 000 x 5 000 x 3 000 mm compressed-air blasting chamber on rails into a 7 900 x 5 000 x 4 890 mm spray and curing booth, wet paint cured at 75 to 80 °C.
- 06
Inspection
Visual weld inspection under the welding coordinator and dimensional measurement with a six-axis FARO Arm Prime 10.
From the shop
From the shop
Structures that have left this hall, shown as anonymous models: the geometry we welded, its real overall size, and nothing that identifies whose drawing it was.
18 models
Each model is rendered from the production geometry in raw steel, without paint, and is shown as a still. Customer names, machine designations and drawing numbers are not published; part lists and files are not offered. The interactive model above this section is a parametric example, not one of these.
Where this fits
Frames run through cutting, welding and machining in that order, and they are what the construction, agricultural and machine building sectors buy from this hall.
Questions we are asked before a first order
- What steel do you weld?
- The certified welding scope is ISO/TR 15608 group 1, unalloyed and fine-grain structural steels up to 40 mm, and group 8, austenitic stainless from 3.0 to 16.0 mm. S235 and S355 are the grades we work most and both sit in group 1. Aluminium is outside the certified scope and is not offered.
- To what weld quality do you work?
- Execution class EXC2 to EN 1090-2, which assigns weld quality level C to EN ISO 5817, under our certified EN ISO 3834-2 welding quality system. Welding is MAG 135, manual and robotic. If your drawing calls for level B, say so on the drawing and we will price it.
- Can you paint or galvanise it?
- Wet paint, in our own line: a blasting chamber rail-connected to a spray and curing booth, so a piece is blasted and painted without leaving the building. Powder coating is not offered. Galvanising is on request.
- What do you need from me to quote?
- The drawing, as STEP, DWG, DXF, PDF or ZIP; the material specification; the weld quality class if it is not the standard one; the finish; the quantity or the series size; and the date you need it. A 2D drawing is enough to start.
- How big a piece can you take?
- The published machine figures are in the envelope table on this page and in full on the capabilities page: the laser bed, the press brake, the boring mill travels, the blasting and paint booths. Crane capacity, maximum weldment size and mass, and transport limits are not published by the parent company and are confirmed per enquiry rather than estimated here.
- Can you machine the mounting faces after welding?
- Yes, and it is the usual route for this group: weld, stress the frame if the drawing calls for it, then machine. The horizontal boring mills take 6 200 x 3 000 x 1 600 mm of travel on a 1 800 x 2 500 mm table rated to 16 000 kg, so a frame is bored and faced in one setting rather than passed to a subcontractor.
Anything not answered here is answered on the enquiry, not estimated on this page.
Start here
Send the drawing. We answer with a price and a date.
STEP, DWG, DXF, PDF or ZIP, up to five files. Your drawings stay private: they are stored outside the web server and read only by our engineers.