SPRING 2022

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THE DISTRIBUTOR’S LINK 179 NATIONAL FASTENER DISTRIBUTORS ASSOCIATION 3020 Old Ranch Parkway #300, Seal Beach CA 90740 TEL 562-799-5509 EMAIL nfda@nfda-fasteners.org WEB www.nfda-fasteners.org PAC-WEST AFTER HOURS NETWORKING EVENTS by Amy Nijjar Mark Your Calendar Today! We are excited about the upcoming Pac-West After Hours networking events. Here’s the schedule: ¤ May 19 – Brea, CA ¤ June 9 – Denver, CO ¤ August 18 – Vancouver, BC ¤ November 17 – Bay Area, CA We can’t wait to see everyone at these fun and casual events! Don’t Miss the Spring Dinner Meeting and Vendor Showcase on April 12 Pac-West Dinner Program! It’s time for the next in the series of Pac-West Dinner Programs. Presenters Mark-Thomas Cordova of Centennial Bolt, Eunice Hajek of M&M Fasteners Supply, and Carmen Vertullo of AIM Testing Laboratory will speak on Building our Workforce for a Successful Future focusing on recruitment, retention, and growth. Check our website www.pac-west.org for more details and to register. Save The Dates ¤ September 14-17 Fall Conference Denver, CO ¤ October 6 Fall Dinner Meeting & Vendor Showcase La Mirada, CA For more information about Pac-West contact Amy Nijjar at 562-799-5509 amy@pac-west.org. ASSOCIATION ARTICLE PACIFIC-WEST FASTENER ASSOCIATION
180 THE DISTRIBUTOR’S LINK LAURENCE CLAUS HOT FORGING FASTENERS from page 154 the tool or by the press opening. This makes them good choices for nuts, short bolts, forming a recess, and for other short complicated shapes. Unfortunately it is not a good choice for long parts. FIGURE 7: EXAMPLE OF HOT FORMING ON HORIZONTAL PRESS FIGURE 5: PARTS COOLING AFTER FORMING Often the forming process requires at least two strikes so that either the part is moved by the operator from one die to another or the machine can reposition tooling to strike the part a second time in the same cycle. The formed part is either ejected or removed by the operator and placed in a bin or tub to cool down before moving to the next operation (Figure 5). Vertical presses can usually apply greater force to the part (Figure 6). The biggest drawback to a vertical press is the limited length of part that can be accommodated in FIGURE 6: EXAMPLE OF HOT FORMING ON VERTICAL PRESS Horizontal presses make easier candidates for automated or semi-automated feeding and especially for long or very heavy parts. In a horizontal press the tool is a clam shell configuration and closes around the cylindrical blank (Figure 7). A punch comes in and strikes the part forming the head (often a hex or carriage bolt shape). These machines often strike the part twice, with the second strike creating head markings. One of the drawbacks of the clamshell die configuration used on horizontal presses is that parts often exhibit a die seam just under the head (Figure 8). This represents where the die was not held perfectly closed during the forming process. All of the pressure exerted against the die opens it just a little bit and a small amount of material flashes in-between. When the condition is minimal it may just be ignored. If, however, it is severe it could interfere with the application clearance hole preventing the part from sitting flat. This opens a critical joint to all sorts of vulnerabilities and is not considered good practice. As a result, some manufacturers machine underneath the head to clean these discontinuities up. Since vertical press dies do not split open, this is not a problem characteristic to them. CONTINUED ON PAGE 184
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SPRING 2022

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