Up to 9 meters x 4.9 meters x 2.2 meters
Up to 20 meters x 5.2 meters x 2 meters
Up to 20 meters x 5.2 meters x 2 meters and up to 50 tons
Up to 3.8 meters x 3 meters x 3.4 meters
Large CMM and Faro Laser Tracker
At K&M we are experts in three things. Large machining, large fabrication, and the pursuit of Zero for our customers. The pursuit of Zero for our customers means zero production headaches, zero production delays, and zero tolerance for errors. Our capabilities also include burning and assembly. K&M’s serves customers in the Oil & Gas, Power Generation, Wind Power, Machine Tool, Mining, Construction, Agriculture, and Locomotive Industries.
Modern Machine Shop Magazine defines large part machining as the machining of any part that is too large to be moved by a single person or too large to fit in the work envelope of the most common CNC machines. K&M’s large CNC machining capabilities include parts as large as 20 meters by 5 meters by 10 meters and 100 tons. It is always beneficial to machine a part in as few setups as possible to reduce variation, setup time, handling time, and load and unload time. This varation and these times are waste, which add no value to the customer. This is especially true with large CNC machining where these factors can contribute hours to cycle time and throughput time. K&M’s solution to high quality and cost effective large part machining is to machine a part complete in as few setups as possible, ideally in one setup, on a machine whose size closely matches the part size. This is accomplished with an equipment list that includes several sizes of large boring mills, large gantry mills, and large machining centers that are equipped with right angle heads, univeral heads, spindle extensions, and probes. K&M matches the machine type and machine size to the part size, part features, and production quantity. This means that each part is machined on the lowest cost machine that is capable of producing the part, while still meeting the objective of minimizing setups and waste.
There are 19 large boring mills installed at K&M. The smallest is Machine # 115, a Mitsubishi M-HT 13/1250. This machine has a pallet size of 1.2 meters X 1.25 meters. The axis travel is 1.6 meters in X, 1.5 meters in Y, 1.6 meters in Z. Machine #115 is shown in Picture #1. The largest boring mill at K&M is Machine #112, a PAMA Speedram 2000/3. This machine has a rotary table and two fixed tables. The rotary table measures 3 meters X 3 meters. The two fixed tables are 4 meters X 10 meters and 4 meters X 5 meters. The axis travel is 20 meters in X, 5.2 meters in Y, 3 meters in Z. Picture #1 is M115, K&M smallest large boring mill. Picture #2 is M112, K&M’s largest boring mill.
K&M has the right size boring mill for your large machining work. As a direct result of utilizing the right-size machine, the customer is paying for machining time on a machine that is large enough for the job, but no larger. K&M has multiple large boring mills in each size group. This means that there is redundant capacity to accommodate multiple jobs or multiple customers in each machine size. The redundant capacity translates into faster throughput times for the customer. Figure #1 defines the machine group sizes and the number of large boring mills that K&M has in each group.
There are 10 large vertical gantry mills installed at K&M for large machining. The right size vertical gantry mill is chosen for each job at K&M. This results in the lowest machining cost for each job. Machine # 114 is K&M’s smallest vertical gantry mill. It is a Mitsubishi MVR30. This machine has a table size of 2 meters X 5 meters. X axis travel is 5.2 meters, Y axis travel is 3 meters and Z travel is 1.5 meters. Machine # 111 is K&M’s large vertical gantry mill. It is a SNK HF-7M. The table size is 3.5 meters X 10 meters. X axis travel is 11 meters, Y axis travel is 4.7 meters and Z axis travel is 3.45 meters. Machine # 114 is shown in Picture # 3. Machine #111 is shown in Picture # 4.
K&M has multiple vertical gantry mills in each size group. This means that there is redundant capacity to accommodate multiple jobs or multiple customers in each machine size. The redundant capacity translates into faster throughput times for the customer. Figure # 2 defines the machine group sizes and the number of large vertical gantry mills that K&M has in each group.
There are 5 large horizontal machining centers installed at K&M for large CNC machining. The right size horizontal machining center is chosen for each job at K&M. This results in the lowest machining cost for each job. Machine # 99 is K&M’s smallest horizonal machining center. It is a Niigata HN80D. This machine has two pallets that measure 0.8 meters X 0.8 meters each. X axis travel is 1.5 meters, Y axis travel is 1.2 meters and Z travel is 1 meters. Machine # 126 is K&M’s largest horizontal machining center. It is a PAMA Speedmat 4/160. This machine has two pallets that measure 2 meters X 2.5 meters each. X axis travel is 3.8 meters, Y axis travel is 3 meters, and Z axis travel is 3.4 meters. Machine # 99 is shown in Picture # 5. Machine #126 is shown in Picture # 6.
K&M has multiple horizontal machining centers in each size class. This means that there is redundant capacity to accommodate multiple jobs or multiple customers in each machine size. The redundant capacity translates into faster through put times for the customer. Figure # 3 defines the machine group sizes and the number of horizontal machining centers that K&M has in each group.
K&M Machine-Fabricating Inc. has a complete fabrication facility ready to handle your large and heavy fabrication needs. Our large fabrication and large welding capabilities start with steel plate procurement and include burning, forming, pre-machining, welding, blasting, heat treat, UT (ultrasonic), MT (magnetic particle), PT (die penetrant) inspection, paint, final machining and final inspection. K&M can handle fabrications that weigh up to 50 tons.
Fabrication begins with steel plate procurement to the customer’s steel specification. K&M procures plate steel from several certified steel suppliers. The steel material certification is provided to K&M along with the incoming steel. The material certification is documented in the K&M quality system and is traceable to each component part and final part of every large fabrication that K&M produces. Traceability is maintained throughout K&M’s manufacturing processes.
K&M burns steel plate using a laser burner and a plasma / oxy-fuel burner. Plate up to 100 mm thick can be burned in house. K&M utilizes outside suppliers for burnouts thicker than 100 mm. Burnouts for large fabrications frequently require secondary operations such as beveling, forming, or machining. Beveling is performed in house at K&M. Forming operations utilize K&M’s 500 ton brake press, or those operations are outsourced. Machining of component parts is completed in-house at K&M. Component parts are blasted at K&M prior to welding to remove scale and rust. K&M’s laser burner is shown in Picture #7, the plasma / oxy-fuel burner is shown in Picture #8
Large fabrications are tacked at K&M in part specific fixtures or on layout tables. Fixtures for production jobs are designed and built at K&M. These fixtures are used to reduce tack time and to insure dimensional repeatability. For low volume jobs or jobs that are too large for fixtures to be practical the tack operation is done on a layout table. Picture # 9 shows a fabrication being tacked on a layout table. Picture # 10 shows a large fabrication in a tack fixture.
In-process dimensions for large fabrications are measured and recorded in K&M’s quality system. Large fabrications are welded at K&M using the FCAW, GMAW or SAW welding process. K&M welders are certified to AWS D1.1. K&M has two robotic welding machines and two SAW welding machines along with 50 manual welding stations with constant voltage and automatic wire feed. Picture # 11 shows K&M’s tandem wire robot welding in the head stock / tail stock station. Picture # 12 shows K&M’s tandem wire robot welding in the positioner station.
K&M has AWS certified welding inspectors (CWI) and degreed welding engineers on staff. Welding process development and documentation is a critical part of large fabrication welding. K&M’s engineering processes insure that the proper welding procedure is tested and documented to meet AWS and customer requirements. Welder continuity logs are maintained as part of the quality system. Periodic layered processes audits and welder technique audits are preformed to insure that approved welding processes are followed.
K&M uses internal and third party resources to complete required weld inspections. MT (magnetic particle), PT (die penetrant), and UT (ultrasonic) inspections are preformed to insure quality welds are delivered.
Stress relief or heat treat is often a requirement on large fabrications. K&M has multiple local sources for heat treat. These sources are able to document the heat treat cycle on each fabrication to satisfy customer requirements.
K&M has a paint booth and is able to paint large fabrications to meet customer specific requirements.
K&M has a large CMM and a Faro laser tracker. These inspection tools can provide 100% dimensional inspection of large fabrications. K&M has a complete machining facility capable of machining any large fabrication that K&M manufactures. Picture # 13 shows a large fabrication for the machine tool industry. This large fabrication was fabricated, machined, painted and inspected at K&M.
K&M’s fabrication and machining facilities combine to give our customers a one stop solution for their large fabrication needs. K&M can handle the entire fabrication from raw material procurement through fabrication, heat treat, paint, machining and final inspection.
No large machining or large fabrication job is complete until final dimensional inspection results are documented. K&M has invested in the inspection equipment needed to insure that large machining and large fabrications meet customer requirements. K&M has a large CMM (Coordinate Measuring Machine) capable of measuring parts as large as 3 meters X 6.2 meters X 2.5 meters. For larger parts K&M has a Faro Laser Tracker. The Faro Laser Tracker is capable of measuring any large machining or large fabrication part that K&M can produce. K&M has a large selection of manual gages that are used for in-process and final inspection measurements. All gages and inspection equipment are calibrated and traceable to the appropriate national standards. K&M is ISO 9001 certified. Picture 14 shows the large CMM in action.
K&M can complete your large component outsourcing project by performing assembly operations. We have experience with assembly for the mining, construction and locomotive industries. Services include assembly of hydraulic lines, valves, and fittings, assembly of bearings, bushings and other components. When K&M performs assembly operations for you a large component can come to your facility or to your customer’s facility in the state of completion that works best for your process or your customers’ process.
Are you a buyer of large CNC machining capacity in the state of Michigan? Do you need to know the quantity and size of large CNC machines that are available for outsourcing in the state of Michigan? Research on the top companies in Michigan as ranked by a Google search for Large Machining Michigan and […]
Large Fabrications and large castings often require machining of large bores. The large machining contract supplier must have machines, tools, gages, processes and data collection systems in place to machine close tolerance large bores to the customer’s requirement. Large bores can be machined on a horizontal boring mill or on a vertical gantry mill. There […]
This is the first in a series of articles that will explore the process controls that are used by contract manufacturers that specialize in large machining and large fabrications. The focus is on the process controls that may be different for a contract manufacturer of large machining and large fabrications. The intended audience includes buyers, […]
Large CNC machining of large steel casting and large steel fabrications frequently requires milling operations in tight spaces where a standard right angle head attachment will not fit. In these cases it is necessary for the machining supplier to purchase a custom right angle head small enough to fit into the available space. Right angle […]
Large steel castings can be subject to inclusions or structural anomalies. These inclusions can cause high tool wear and even catastrophic tool failure. The need to machine 140 mm diameter holes 175 mm deep into a large steel casting with a high frequency of inclusions provided an opportunity to test various tooling solutions. High feed milling […]
Economical and accurate machining of large components can be achieved using large CNC machines and the 3+2 machining technique. This article will examine 3+2 machining and relate the economical and quality benefits in terms of lean manufacturing’s seven forms of wastes. 3+2 machining refers to the use of a 5 axis CNC machine in a […]
Submerged arc welding is a proven processes with many benefits, including high productivity and high quality. It is particularly suited to welding on large fabrications in series production. There are a number of process steps that are important during the SAW welding process to insure that high quality welds are produced. K&M Machine-Fabricating, Inc. uses […]
Many of the criteria for designing the weld joints for robotic welding apply to designing weld joints for manual welding in large fabrications. According to the American Welding Society weld joints must be repeatable for robotic welding to be successful. The same is true for welding large fabrications. The designer of large fabrications can chose […]
The base of a machine tool is critical to the performance of the machine tool. A large surface grinding machine may have a required positional accuracy of 0.005 mm on all axes. This accuracy must be maintained over the life of the grinder and during metal removal operations. Many components of the machine tool contribute […]
Machining of large fabrications and castings is required by many industries. These include the mining, oil and gas, agriculture, construction and machine tool industries. All of these industries are subject to changes in demand. Manufacturing companies that operate in these industries must be able to adjust capacity, up or down, to meet the market demand […]