Type
Welding jigs and fixtures built to drawing
The fixture a customer welds their own series on: a long fixture bed with clamping stations, a frame with upright clamp posts and side stops, a rotating octagonal ring with internal locating frames, a fixture table on plated legs, a compact jig with screw clamps and a curved locating arm, a press jig of two bars with locating blocks. A jig has to be stiffer and more accurate than the parts made on it.
The gallery holds jigs from one metre and a quarter to a fixture bed close to fourteen metres.
What the drawing must show
A part like this is priced from the drawing. The quotation is fastest when it carries:
- The datum scheme and the positions of every locator and stop, with their tolerances
- Which faces are machined after welding, and the flatness between them
- The clamps, pins and bought parts, and who supplies them
- Section sizes and plate thicknesses with the material grade
- The finish, and the faces that stay bare
13 models of this type
Real structures that came through this company as built jobs, quoted enquiries or designs from our own office, shown as anonymous models with their measured size. Open one for its description.
- Overall size, L x W x H
- 13 644 x 1 650 x 606 mm
A welding jig like this forms a long low fixture bed made from plate and box sections, with rows of clamping lugs, stiffening ribs and locating brackets stepping down its length. A curved frame with a bored eye sits at one end, and a flat machined section with slotted rails runs mid length. It measures about 13.6 m long, 1.6 m wide and 0.6 m high. Here a part like this is tacked up on a fixture and welded through, with the bores and pads machined after welding.
- Overall size, L x W x H
- 8 640 x 4 099 x 596 mm
A welding jig built as a long fixture bed from twin box section beams, carrying rows of clamps, toggle arms, locating pins and adjustable stops, with a smaller clamping frame set beside it. What stands out is the repetition, dozens of matched clamp stations spaced evenly along the bed, each with its own locating lug. It measures about 8.6 m long, 4.1 m wide and 0.6 m high. A piece like this is tacked up on a fixture and welded through, then machined after welding on a horizontal boring mill.
- Overall size, L x W x H
- 4 192 x 4 010 x 3 915 mm
An octagonal tack-welding fixture built from hollow section rails and uprights, with internal locating frames crossing the ring and stub posts set along the top edge. Short brackets, pads and small bores are fitted into the frame to hold parts square, with projecting corner lugs for clamping on each face. It measures about 4.2 m long, 4.0 m wide and 3.9 m high. In this hall a part like this is welded on the 14 m robotic track for a series, by hand for a one-off.
- Overall size, L x W x H
- 2 167 x 1 660 x 637 mm
A welding jig built from a rectangular box section base frame, carrying rows of upright locating plates, angled support posts and gusseted brackets, with toggle clamps mounted on top and slotted holes along the uprights. The mix of tall angled posts and flat plates set out to hold parts from several sides stands out. It measures about 2.2 m long, 1.7 m wide and 0.6 m high. Such parts are set on a fixture, tacked and welded out.
- Overall size, L x W x H
- 5 395 x 1 810 x 521 mm
A welding jig built as a long two-rail base frame with internal cross members, carrying a row of upright A-frame clamp posts, angled braces and side stops along its full length. The standout feature is the line of swing clamps on tall posts set at even spacing down both rails, holding a workpiece in position. It measures about 5.4 m long, 1.8 m wide and 0.5 m high. Such a part is tacked up on a fixture and welded through, then bored and faced on the boring mill.
- Overall size, L x W x H
- 5 302 x 980 x 982 mm
A long welding jig built as a fixture frame of box section rails and angled plate uprights, braced by diagonal struts and set on levelling feet with base plates. A row of clamp arms with locking handles runs along the top rails, paired with locating pins and small machined seats set between the stiffeners along its length. It measures about 5.3 m long, 1.0 m wide and 1.0 m high. A part like this is set on a fixture, tacked and welded out.
- Overall size, L x W x H
- 5 128 x 1 704 x 614 mm
A welding jig built as a long flat base frame of box section rails and cross members, with a row of upright posts fitted with toggle clamps and swinging arms along its length. A repeating line of angled clamp levers and locating lugs holds parts square, with a shaped bracket and small boxed-in fixture at one end. It measures about 5.1 m long, 1.7 m wide and 0.6 m high. Pieces like this are tacked up on a fixture and welded through.
- Overall size, L x W x H
- 4 386 x 1 094 x 392 mm
A welding jig built as a long fixture frame from box section rails and upright legs, with rows of plate brackets, bored lugs and pivot arms spaced along both sides. Swing clamps and locating pins line the rails evenly, ready to hold a workpiece square while it is welded. It measures about 4.4 m long, 1.1 m wide and 0.4 m high. Such a part is welded out on a fixture, then machined after welding on a horizontal boring mill.
- Overall size, L x W x H
- 4 132 x 2 047 x 1 695 mm
A tack-welding fixture built as a long plated trough sitting on four box-section legs, with upright clamp posts carrying pivoting clamp arms and diagonal braces tying the legs together. The hopper-shaped plated bed with angled ribs and gusseted corners stands out, forming a defined seat for parts to be positioned and clamped. It measures about 4.1 m long, 2.0 m wide and 1.7 m high. A part like this is set on a fixture, tacked and welded out, then measured with a six-axis measuring arm.
- Overall size, L x W x H
- 3 184 x 1 000 x 874 mm
A welding jig built on a long base frame of box section beams and angled plate legs, with flat footpads and raised clamp stations along the top rail. A row of adjustable toggle clamps with threaded spindles lines the upper edge, locating parts against folded stops and sloped support plates, with round locating pins at each end. It measures about 3.2 m long, 1.0 m wide and 0.9 m high. Such a part is welded out on a fixture, with the bores and pads machined after welding.
- Overall size, L x W x H
- 1 442 x 1 134 x 508 mm
A welding jig built as a plate and box section bed with upright posts, cross beams and diagonal ribs, fitted with screw clamps, curved hooked locating arms and flat stop plates. What stands out is the row of threaded clamp spindles with handwheels facing across the bed, plus the hooked arms swinging in to hold the work. It measures about 1.4 m long, 1.1 m wide and 0.5 m high. A part like this is tacked up on a fixture and welded through.
- Overall size, L x W x H
- 1 243 x 1 042 x 403 mm
A welding jig built on two channel base rails, with an upper frame of box section uprights, flat bars and lugged brackets tying it together. Screw clamps with handled spindles and a pivoting locator with a bored seat clamp and position parts for tacking. Bored pads and machined seats mark the locating points on both sides. It measures about 1.2 by 1.0 m and stands 0.4 m high. Parts like this are set on a fixture, tacked and welded out, then bored and faced on the boring mill.
- Overall size, L x W x H
- 2 736 x 280 x 574 mm
A press jig built from two long flat plate bars, one carrying five raised locating blocks on angled gussets, the other machined with a central slot and a row of drilled and bored holes along its length. The stops set part position, while the slotted, bored bar guides and locates it beneath. It measures about 2.7 m long, 0.3 m wide and 0.6 m high. Such a part is laser cut from plate up to 20 mm and tack welded on a fixture and welded out.
Each model is rendered from its own 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.
How a part like this goes through the hall
The base is welded from hollow sections and plate, stress is kept low by the welding sequence, and the locating faces are machined in one setting on a boring mill with 6 200 x 3 000 x 1 600 mm of travel, so every locator is cut from one datum. Clamps and pins are fitted, the fixture is measured with a six-axis measuring arm against the drawing, and it is painted where the drawing allows.
Where this fits
Capabilities it runs through
Industries that order it
Notes from the blog
Other types in this group
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