David Crosby

David Crosby Tel:- - Email:-Cambridgeshire 4-year apprenticeship trained, and post graduate educated, in science and art. I take great pride in my work, and bring an innovative and practical perspective to the design process, guided by experience in many industries. I have an open mind and am always open to new ideas, always looking to learn more about engineering design and practice. SHOP-FLOOR TRAINING: I served a 4-year indentured apprenticeship, as a fitter and turner, at Doxford engines, a 100-year-old marine engine works, learning Victorian engineering practice. SHOP-FLOOR WORK EXPERIENCE: I worked on the shop floor for over 15 years, as a fitter, fitter\welder, mechanic, turner, miller (manual and CNC), instrument maker, model maker, maintenance technician, and graduated as a toolmaker at Philips Radio Communication Systems in Cambridge. THEORETICAL TRAINING: HND in Mechanical Engineering from Sunderland Polytechnic. HNC in Software Engineering from Anglia Polytechnic. Post Graduate modules, mostly in the top 3 of the class: Manufacturing management, Computer aided engineering, Computer aided process planning, General management, Concurrent engineering, Knowledge based systems, Product data modelling, Computer programming (C) and Database design (SSADM) from Cranfield university for a masters in CAE. CAD TRAINING: Ptc trained in modelling, assembly, detailing and CNC machining. DESIGN AND DRAUGHTING EXPERIENCE IN: Manufacturing machine tools, Jigs and Fixtures, Submarine, Diesel Engines, Truck Brakes, Industrial Gas Handling, Hybridization, Weapon systems, Vacuum Furnace and Laboratory Equipment. Working exclusively with Ptc CAD since 1997 from Pro Engineer 17 to 2000, Wildfire 2/4 and Creo 2. I have a personal Pro Engineer Creo 2 licence and CAD station and am available to work from home. Employment History Over 10 years’ experience of making things from drawings, developing things from concept, working on lathes, mills, grinders, and hand tools on the shop floor. I have built £1 million marine engines (1980 prices) with files, drills, scrappers, and a hammer and chisel. I have rebuilt internal combustion engines, replacing conrods, pistons, valves, gears and crankshaft bearings. I have maintained machines making printed circuit boards, placing 3 components per second, along with all the associated machinery, at Philips, on 3 x £1 million production lines (1990 prices). I could have stayed at any of my manual jobs, I was at the top of the game in all my hands-on endeavours, but got bored and needed to learn more. I have worked in design for the last 30 odd years, starting with a pencil and paper, moving on to a draughting board, self-educated in 2D AutoCAD (10 years’ experience), and ending up in 3D design using pro engineer, now Creo (over 20 years’ experience of 3D CAD). I am an expert in 3D model making, surfacing and solids, and an expert at draughting using BS8888 and ASME Y14.5. I am an expert in tolerance analysis having earned the nickname DVA Dave (dimensional variation analysis), at Cummins technical centre, Daventry, where I taught the engineers and students. CV of David Crosby Page 1 of 10 Jan 18 to present: Self-employed designer working on a system of shelters, using a standard, customisable, baffle wall. I have produced workshop drawings and CAD models for production. Original design to get around the 50% open rule for smoking shelters. Sand casting 02 Feb 16 – 11 Dec 17: Senior Mechanical Engineer BAE Land Systems. Barrow-in-Furness. (1 Ext to Contract) Working on CAD design and draughting using Creo 2. Working under ITAR with the USA and Indian military on the integration of the M777 into the Indian army. CV of David Crosby Page 2 of 10 Coreless sand castings Clean sheet design. Die casting 05 Jan 15 – 15 May 15: Engineer Aish Technologies. Working on Combat Management System electronic enclosures for military submarines  Creating solid and sheet metal part models, assemblies and drawings. 01 Apr 14 – 19 Dec 14: Engineer (1 Ext to Contract) Caterpillar Re-manufacture Creo 2. Working on the Engineering Change of military engine and gearbox components. Creo 2 Solid/Surf/Drafting.  Modifying and creating CAD models, assemblies and workshop drawings in line with change requests, in collaboration with suppliers, production, inspection, finance and engineering.  Creating and updating documentation to record Engineering Change process. Coreless Sand casting CV of David Crosby Page 3 of 10 3-core Sand casting The customer, Volvo, wanted a “curvy” brake housing. My design was a clean sheet design based on 3 eggs, a beam and a bridge. The final iteration weighed 10.788kg and passed FEA in ANSYS. The company saved £1 per kilo per casting. The design was cancelled due to the incompetence of the project leader. Original “blocky” brake housing weighed 12.718kg. A consultancy charged £70,000 to put housing through a computer programme that reduced the weight to 12.043kg. The final design looked no different than the original. Machine from solid CV of David Crosby Page 4 of 10 Forgings 01 Feb 10 – To 27 Jan 12: Design Draughtsman (7 Extensions to Contract) Cummins Engines. Worked on medium sized diesel and gas engines with Wildfire 2 solid/surfacing/draughting.  Created Master Cad Models for conrods, crankshafts and engine components.  Created drawing packs using GD&T to ASME 14.5M for numerous engine components.  Worked with suppliers on tolerances and forging pickups for engine components.  Produced tolerance stack-up reports on engine clearances.  Produced calculations on gear balance to ISO 1940-1 using forging tolerances. 05 May 08 – To 01 May 09: Design Engineer Aixtron Ltd. (Pro Engineer) Working on high temperature vacuum furnace for the semi-conductor industry.  Created models of machined parts, welded fabrications, sheet metal cladding and assemblies.  Created workshop drawings for the production of weldments, piece parts and assemblies.  Worked on shop floor machining prototype parts and assembling complete instruments. 07 Jan 08 – To 02 May 08 Design Engineer Perkins Engines Ltd. (Pro Engineer). Working on Tier 4 exhaust packages Creating assemblies for multiple customer applications. 04 Jun 07 – To 21 Dec 07 Designer Engineer Cambridge Fluid Systems. (Pro Engineer) Working on gas mixing cabinets for the semi-conductor industry. 08 Jan 07 – To 01 Jun 07 Designer Engineer Leyland Product Developments (LPD) Ltd. (Pro Engineer) Working on a stretched Chrysler Hummer Limousine and LPG fuel conversion for Mercedes truck. March 06 – To Sep 06 Draughtsman, NES Ltd. (Pro Engineer) CV of David Crosby Page 5 of 10 Draughting to ASME Y14.5M CV of David Crosby Page 6 of 10 I was given a laser chip, an optical lens, a fibre optic connector, and told to focus the laser into a fibre optic cable. The module gave a 98% efficiency of laser energy from the chip down the cable. Cooling water inlet Original, clean sheet, design. -ve Fibre optic cable connector Optical lens Laser chip 1.5mm long Cooling water outlet +ve Original, clean sheet, design. A tool I designed, made, and used, to fix the worn out door hinges on my Renault 5. CV of David Crosby Page 7 of 10 I was given this conceptual fluid logic diagram. I worked for over 1000 hours on ProE 3D CAD to produce this design. I worked with a Carville engineer, and a machine tool programmer, to produce this working manifold. The manifold put all the fluid connections, routing and logic for: a compressor, vacuum pump, 18 micro-valves, 5 wash bottles, 4 heater coils, 1 waste bottle, 8 reservoirs, 16 one-way valves and 8 diaphragm valves. CV of David Crosby Page 8 of 10 .. The carrier was designed to fit under the manifold shown above. It got its name, universal as the carrier was designed to fit on the DNA spotting machine, 64,000 spots per slide, and locate a common 0,0 on each machine. Then, without touching the slides it was moved onto the hybridization machine and after, again without touching the slides, it was located on the scanning machine. It provided an accurate positioning system to align the spots on all machines. Further mods were made to allow individual units to stack on top of each other for a drying process CV of David Crosby Page 9 of 10 CV of David Crosby Page 10 of 10 Mechanism design. The machine stacked Cotag electronic key fobs in a feeder, and placed them on a slide that took them to a test fixture and returned them to one of two holes in the bed and dropped them into a pass or fail container below the bed. I designed the machine using sketches, drawing board and AutoCAD. I machined and assembled all of the parts and cut, welded, and sprayed the frame in my garage.