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162 THE DISTRIBUTOR’S LINK LAURENCE CLAUS HOW FASTENERS ARE MADE - PART 2: HOT HEADING AND SCREW MACHINING from page 156 This usually means that everything associated with the part in that spindle must be able to index. As a result, bar fed, multiple spindle screw machines vaguely resemble a gatling gun as each spindle must be independently fed with bar stock that indexes in a rotary motion around the centerline of the machine (see Figure 7). The feeding method also serves as a distinguishing characteristic of the process. Screw machines may feed long, continuous bars through a bar feeding mechanism or load individual blanks into a collet or jaws that rotate on the spindle. Finally, screw machines may be known by the type of drive the machine incorporates. Traditional machines are cam driven. This means that a series of cams time when the machine performs its specific functions such as moving the tools in and out of the workpiece, indexing the machine, feeding new stock into the machine, etc. In a cam driven machine, each operation must be carefully planned and precisely timed so that the entire process becomes an elegant and finely choreographed dance. Traditional and Swiss screw machines are cam driven. Most late model equipment is numerically controlled by a computer (CNC machines). The CNC controller executes a predefined program which controls the overall machine and the precise timing, placement, and movement of each tool. Although each machine works a little differently, the fundamental concept is universal. The workpiece (continuous bar or individual blank) is fixtured into a holder (usually a split collet or a set of jaws like a drill chuck) that is integral to the spindle and grasps the workpiece allowing it to spin at the speed of the rotating spindle. Non spinning tools are then moved into the spinning part. The tools are fixtured into holders attached to moving slides. The slide may come in from the front on what is called the axial slide (see Figure 8) or from the sides on what is called the cross slide (see Figure 9). In some cases, there can be more than one cross slide that comes in from different radial directions relative to the spindle. Common features that come from tools on the axial slide include end drilled holes, end tapped threads, and end chamfers. Common features that come from the tools on the cross slide include shaved features like grooves, turned down shoulders, chamfers, faced bearing surfaces, burnished surfaces, checkering or axial knurls, and parting (part cut-off), to name just a few. The workpiece is indexed past each station available and when it reaches the final station it is cut-off from the continuous bar or released from the collet. FIGURE 7: EXAMPLE OF MULTI-SPINDLE SCREW MACHINE (3 OF 6 SPINDLES PICTURED HERE) FIGURE 8: EXAMPLE OF AXIAL SLIDE CONTINUED ON PAGE 166
AFC Industries has acquired West Chicago based Chicago Industrial Fasteners. Founded in 2003 by John and Cathy Price, CIF specializes in the supply of both standard and specialty fasteners to its customer base of original equipment manufacturers, hardware providers, and material fabricators that operate in a variety of end markets, including heavy trucking, automotive, agricultural equipment, and wind and solar power. CIF owner Cathy Price said, “When you work for many years to build a family business it is more than just a company. It was important to us that we found a partner with similar values who was going to take great care of our customers and be a great home for our team. A friend in the industry who had previously sold to AFC suggested we talk to them. We are so glad we did. They checked all the boxes, and I am confident the future is bright for CIF and AFC.” John Price added, “This new chapter with AFC opens the door for us to continue to expand the solutions we can provide for our customers. It is exciting to have more resources to keep building on the foundation of service, teamwork, and partnership that we have established over the past 20 years.” AFC CEO Kevin Godin said, “In CIF we found a business built around the same core commitment to providing excellent service that we strive for at AFC. The more we got to know John and Cathy and their team the more obvious it was that this was a great fit. Both of these businesses are better together, each brings key resources and capabilities that strengthen the other.” Headquartered in Fairfield OH, AFC Industries is a dynamic organization dedicated to providing supply chain management solutions for fasteners, tooling, and assembly components. Their supply solutions include Vendor Managed Inventory, Stock and Release programs, Light Assembly, Kitting, and Private Labeling services amongst others. AFC supports a diverse base of manufacturers across a broad range of industries. For more information about AFC Industries visit them online at www.afcind.com. THE DISTRIBUTOR’S LINK 163
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In the Spring 2024 issue of 6 DISTR
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SPRING 2024

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