# US 10,118,215 B2 · Blind rivet setting device and method for setting a blind rivet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,215 B2 - Document ID: US10118215B2 - Status: Granted - Kind: B2 - Application number: 14/803,742 - Filed: 2015-07-20 - Published: 2016-02-18 - Granted: 2018-11-06 - Earliest claimed: 2014-08-15 - Assignees: Gesipa Blindniettechnik GmbH - Applicants: Gesipa Blindniettechnik GmbH - Inventors: Richard Gaertner; Lothar Wille; Thomas Bamberger - Web page: https://patentgrep.com/patent/US10118215B2 ## CPC - B21J 15/28: Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups - B21J 15/043: {by pulling a mandrel} - B21J 15/105: {Portable riveters (pliers for riveting B21J15/386)} - B21J 15/26: operated by rotary drive, e.g. by electric motor - B21J 15/285: {for controlling the rivet upset cycle} - 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) ## Abstract Blind rivet setting device and method. The blind rivet setting device includes a housing; a pulling mechanism arranged in the housing; an electric motor structured and arranged move the pulling mechanism in a pulling direction out of a rivet receiving position; a control device, which is structured and arranged to control the motor, including a tear-off detection device that generates a mandrel tear-off signal when a pulling mandrel is torn off; and an operating device that is connected to the control device. When the mandrel tear-off signal is generated, the control device stops the driving of the pulling mechanism in the pulling direction. ## Claims ### Claim 1 A blind rivet setting device comprising: a housing; a pulling mechanism arranged in the housing; an electric motor structured and arranged to move the pulling mechanism in a pulling direction out of a rivet receiving position; a control device, which is structured and arranged to control the motor, comprising a tear-off detection device that monitors current or electric power drawn by the motor to generate a mandrel tear-off signal when a pulling mandrel is torn off; and an operating device that is connected to the control device; wherein, when the mandrel tear-off signal is generated, the control device is configured to stop the driving of the pulling mechanism in the pulling direction, and wherein the tear-off detection device comprises a current monitor structured and arranged to constantly ascertain a current fed to the motor, which includes a maximum value and an intermediate maximum occurring prior to the maximum value, and to generate the mandrel tear-off signal only when the current, after reaching the maximum value, drops at least by a predetermined percentage of the maximum value within a pulling movement of less than 1 mm, whereby the tear-off detection device does not detect the intermediate maximum as the maximum value. ### Claim 2 (depends on 1) The blind rivet setting device according to claim 1, wherein the control device is structured and arranged to decelerate the motor while energy is recovered. ### Claim 3 (depends on 2) The blind rivet setting device according to claim 2, wherein, when the mandrel tear-off signal is generated, the control device is structured and arranged to reverse the motor and to move the pulling mechanism counter to the pulling direction. ### Claim 4 (depends on 3) The blind rivet setting device according to claim 3, wherein the control device is structured and arranged to move the pulling mechanism all the way into the rivet receiving position. ### Claim 5 (depends on 3) The blind rivet setting device according to claim 3, wherein the control device is structured and arranged to move the pulling mechanism all the way into a position outside of the rivet receiving position. ### Claim 6 (depends on 5) The blind rivet setting device according to claim 5, wherein the position outside of the rivet receiving portion is a position immediately before the pulling mechanism opens. ### Claim 7 (depends on 1) The blind rivet setting device according to claim 1, wherein the predetermined percentage is 30%. ### Claim 8 (depends on 1) The blind rivet setting device according to claim 1, wherein the operating device is structured and arranged to transmit at least two different actuation signals to the control device depending on different actuation modes. ### Claim 9 (depends on 1) A method for setting a blind rivet using the blind rivet setting device of claim 1 comprising: actuating the control device to move, via the controlled electric motor, the pulling mechanism in the pulling direction out of the rivet receiving position; wherein, when a pulling mandrel is torn off, the method further comprises automatically generating a mandrel tear-off signal so the control device stops the moving of the pulling mechanism in the pulling direction. ### Claim 10 (depends on 9) The method according to claim 9, wherein, when the mandrel tear-off signal is generated, the method further comprises decelerating the motor and recovering energy. ### Claim 11 (depends on 10) The method according to one of claim 10, wherein, when the mandrel tear-off signal is generated, the method further comprises altering the direction of movement of the pulling mechanism. ### Claim 12 (depends on 11) The method according to claim 11, further comprising moving the pulling mechanism all the way into the rivet receiving position. ### Claim 13 (depends on 11) The method according to claim 11, further comprising moving the pulling mechanism into a position outside of the rivet receiving position. ### Claim 14 (depends on 13) The method according to claim 13, wherein the position outside of the rivet receiving position is a position immediately before the pulling mechanism opens. ### Claim 15 (depends on 9) The method according to claim 9, further comprising monitoring a current draw of the motor to generate the mandrel tear-off signal and generating the mandrel tear-off signal when, after reaching a maximum value, the current drops by at least a predetermined percentage of the maximum value. ### Claim 16 (depends on 9) The method according to claim 9, wherein the operating device is actuatable in at least two different actuation modes and transmits a different signal to the control device in each actuation mode. ### Claim 17 A blind rivet setting device, comprising: an electric motor; a pulling mechanism; a control device to move, via the electric motor, the pulling mechanism in a pulling direction out of a rivet receiving position, wherein, only when a predetermined percentage drop from a maximum current drawn by the electric motor occurs within a pulling movement of less than 1 mm, which is indicative of a pulling mandrel being torn off, the control device is configured to stop moving of the pulling mechanism in the pulling direction and the electric motor is decelerated to recover energy.