# US 8,769,789 B2 · Die for rivet machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,769,789 B2 - Document ID: US8769789B2 - Status: Granted - Kind: B2 - Application number: 13/162,986 - Filed: 2011-06-17 - Published: 2012-12-20 - Granted: 2014-07-08 - Earliest claimed: 2011-06-17 - Assignees: BTM Corporation - Applicants: Robert G. Bathurst - Inventors: Robert G. Bathurst - Web page: https://patentgrep.com/patent/US8769789B2 ## CPC - B23P 19/00: Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) - B21J 15/025: {Setting self-piercing rivets} - B21J 15/32: Devices for inserting or holding rivets in position with or without feeding arrangements - B23P 11/00: Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for (connecting sheet metal or metal tubes, rods or profiles B21D39/00; riveting B21J; soldering, unsoldering, welding B23K; hand tools for connecting wire or strip B25B25/00; connecting metal parts by adhesives F16B11/00) - B23P 19/02: for connecting objects by press fit or for detaching same (B23P19/10 takes precedence) - Y10T 29/53704: tool chuck and tool - Y10T 29/53709: Overedge assembling means - Y10T 29/5377: Riveter - Y10T 29/53791: Edge binding - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - B21J: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A rivet machine is provided. The rivet machine employs a die including a die body that has an inner wall with a pair of retaining ribs or projections extending inwardly therefrom. In use, the rivet pushes a slug from a workpiece within which it is mounted and into an opening of the die. The projections engage and retain the slug within the inner wall. According to further aspects, the pair of retaining ribs are diametrically opposed around the inner wall. Each of the retaining ribs has two converging surfaces that form an angle of between 90 and 150 degrees. In yet another aspect, the projections can be discontinuous such that a first retaining rib is longitudinally offset on the inner wall from a second retaining rib. ## Claims ### Claim 1 A rivet machine comprising: a rivet; a punch; and a die including a die body having an inner wall that defines an opening, the inner wall comprising a generally cylindrical shape with at least one pair of fixed projections extending inwardly therefrom, wherein the rivet pushes a slug from a workpiece within which the slug is mounted and into the opening, against the inner wall wherein said body further includes a longitudinal chute being a through opening in which multiple slugs are passed through the through opening. ### Claim 2 (depends on 1) The rivet machine of claim 1 wherein the at least one pair of projections comprise diametrically opposed projections. ### Claim 3 (depends on 1) The rivet machine of claim 1 wherein the at least one pair of projections comprise at least one projection having two converging surfaces. ### Claim 4 (depends on 3) The rivet machine of claim 3 wherein the two converging surfaces comprise a first and a second surface that form an angle of between 90 and 150 degrees. ### Claim 5 (depends on 4) The rivet machine of claim 4 wherein the first and second surfaces form an angle of 120 degrees. ### Claim 6 (depends on 3) The rivet machine of claim 3 wherein the at least one pair of projections comprises two projections each having two planar surfaces that converge. ### Claim 7 (depends on 3) The rivet machine of claim 3 wherein the at least one pair of projections comprises three pair of projections. ### Claim 8 (depends on 7) The rivet machine of claim 7 wherein each pair of the three pairs of projections comprise diametrically opposed projections. ### Claim 9 (depends on 2) The rivet machine of claim 2 wherein the pair of projections initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. ### Claim 10 (depends on 9) The rivet machine of claim 9 wherein the second diameter is substantially between 90 and 95 percent of the first diameter. ### Claim 11 (depends on 1) The rivet machine of claim 1 wherein the rivet is a self-piercing rivet. ### Claim 12 (depends on 1) The rivet machine of claim 1 wherein the at least one pair of projections are discontinuous wherein each projection of the pair of projections are formed by a first projection longitudinally offset from a second projection. ### Claim 13 (depends on 12) The rivet machine of claim 12 wherein the at least one pair of discontinuous projections are non-parallel relative to a longitudinal axis of the die body. ### Claim 14 A rivet machine comprising: a rivet; a punch; and a die including a die button having a fixed inner wall that defines an opening for receiving a slug, the inner wall comprising a bore having first and second openings that defines an axis, the bore having at least one pair of retaining ribs extending from the inner wall in a direction toward the axis, wherein the rivet pushes the slug from a workpiece within which the slug is mounted and into the opening to a position at least partially within the bore, and in contact with the retaining ribs, and wherein the slug from the workpiece remains at least partially within the bore until a subsequent rivet pushes a subsequent slug into the bore such that the subsequent slug substantially pushes the slug out from the second opening of said bore. ### Claim 15 (depends on 14) The rivet machine of claim 14 wherein the at least one pair of retaining ribs comprises a first and a second retaining rib, each having a first and a second converging surface that form an angle of between 90 and 150 degrees. ### Claim 16 (depends on 15) The rivet machine of claim 15 wherein the first and second converging surfaces form an angle of 120 degrees. ### Claim 17 (depends on 14) The rivet machine of claim 14 wherein the at least one pair of retaining ribs comprises three pair of diametrically opposed retaining ribs. ### Claim 18 (depends on 14) The rivet machine of claim 14 wherein the at least one pair of retaining ribs initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. ### Claim 19 (depends on 18) The rivet machine of claim 18 wherein the second diameter is substantially between 90 and 95 percent of the first diameter. ### Claim 20 (depends on 14) The rivet machine of claim 14 wherein the rivet is a self-piercing rivet. ### Claim 21 (depends on 14) The rivet machine of claim 14 wherein the at least one pair of retaining ribs are discontinuous wherein each retaining rib of the pair of retaining ribs are formed by a first retaining rib portion longitudinally offset from a second retaining rib portion. ### Claim 22 (depends on 21) The rivet machine of claim 21 wherein the at least one pair of discontinuous retaining ribs are non-parallel relative to axis of the bore. ### Claim 23 A rivet machine comprising: a self-piercing rivet; a punch that cycles from a first position to a second position causing the self-piercing rivet to be driven into a workpiece and a slug to be expelled from the workpiece within which it the slug is mounted; and a die including a die button having an inner wall that defines an opening for receiving a slug, the inner wall comprising a bore that defines an axis, the bore having at least one pair of fixed and diametrically opposed retaining ribs extending from the inner wall in a direction toward a second opening of the die positioned along the axis, wherein the slug is directed into the opening to a position at least partially within the bore, and in contact with the at least one pair of retaining ribs, wherein the punch stops from entering the opening in the second position. ### Claim 24 (depends on 23) The rivet machine of claim 23 wherein the at least one pair of retaining ribs comprises a first and a second retaining rib, each having a first and a second converging surface that form an angle of between 90 and 150 degrees. ### Claim 25 (depends on 24) The rivet machine of claim 24 wherein the first and second converging surfaces form an angle of 120 degrees. ### Claim 26 (depends on 23) The rivet machine of claim 23 wherein the at least one pair of retaining ribs comprises three pair of diametrically opposed retaining ribs. ### Claim 27 (depends on 23) The rivet machine of claim 23 wherein the at least one pair of retaining ribs initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. ### Claim 28 (depends on 27) The rivet machine of claim 27 wherein the second diameter is substantially between 90 and 95 percent of the first diameter.