# US 2019/0314898 A1 · Turning machine and method for turning workpieces > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0314898 A1 - Document ID: US20190314898A1 - Status: Published application - Kind: A1 - Application number: 16/349,953 - Filed: 2017-11-21 - Published: 2019-10-17 - Earliest claimed: 2016-11-25 - Assignees: Ensinger GmbH - Applicants: ENSINGER GmbH - Inventors: Fred NASS - Web page: https://patentgrep.com/patent/US20190314898A1 ## CPC - B23B 13/04: for turning-machines with a plurality of working-spindles - B23B 3/167: {lathe with two or more toolslides carrying turrets} - B23B 3/32: for performing identical operations simultaneously on two or more workpieces - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) ## Abstract The present disclosure generally relates to a turning machine comprising a first spindle which can be set in rotation for gripping and rotating a first semi-finished product to be machined, in particular to be turned, and a second spindle which can be set in rotation and is likewise suitable for gripping and rotating a second semi-finished product to be machined. A first bar load magazine associated with the first spindle is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles. A second bar load magazine associated with the second spindle may be configured to convey a second semi-finished product through a second opening of the second spindle into the machining area. ## Claims ### Claim 1 A turning machine, comprising a first spindle, which can be set in rotation for gripping and rotating a first semi-finished product to be turned, and a second spindle, which is opposite the first spindle and can be set in rotation, for gripping and rotating a second semi-finished product to be turned, wherein the first spindle is associated with a first bar load magazine, which is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles, and wherein the second spindle is associated with a second bar load magazine, which is configured to convey the second semi-finished product through a second opening of the second spindle into the machining area. ### Claim 2 (depends on 1) The turning machine according to claim 1, wherein the first spindle and the second spindle are identical parts and are arranged symmetrically with respect to one another. ### Claim 3 (depends on 1) The turning machine according to claim 1, wherein the machine further comprises at least one robot, and wherein the at least one robot is configured to displace at least parts of the first semi-finished product from the first spindle into the second spindle and/or to displace at least parts of the second semi-finished product from the second spindle into the first spindle. ### Claim 4 (depends on 1) The turning machine according to claim 1, wherein at least one tool revolver is arranged within the machining area for receiving at least one tool for machining the first semi-finished product to be machined and/or the second semi-finished product to be machined, and wherein the at least one tool revolver has a third spindle, which can be set in rotation, for receiving and for rotating the first semi-finished product to be machined and/or the second semi-finished product to be machined. ### Claim 5 (depends on 4) The turning machine according to claim 4, wherein four tool revolvers are arranged within the machining area, wherein two tool revolvers each have a spindle, which can be set in rotation and which are configured to each simultaneously receive and rotate one of the semi-finished products to be machined, wherein the other two tool revolvers are configured to simultaneously machine the simultaneously rotating semi-finished products. ### Claim 6 (depends on 5) The turning machine according to claim 5, wherein the first bar load magazine is configured to transfer the first semi-finished product from the first spindle into one of the spindles of the tool revolver, and wherein the second bar load magazine is configured to transfer the second semi-finished product from the second spindle into the other of the spindles of the tool revolver. ### Claim 7 A method for producing a first partially machined workpiece and a second partially machined workpiece by turning a first semi-finished product and turning a second semi-finished product in a turning machine, the method including steps comprising: providing a turning machine comprising: a first spindle, which can be set in rotation for gripping and rotating a first semi-finished product to be turned; a second spindle, which is opposite the first spindle and can be set in rotation, for gripping and rotating a second semi-finished product to be turned; wherein the first spindle is associated with a first bar load magazine, which is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles; wherein the second spindle is associated with a second bar load magazine, which is configured to convey the second semi-finished product through a second opening of the second spindle into the machining area; producing a first partially machined workpiece by: conveying the first semi-finished product through the first opening of the first spindle of the turning machine into the machining area situated between the spindles; gripping the first semi-finished product in the first spindle; setting the first semi-finished product in rotation by means of the first spindle; turning a starting region of the first semi-finished product by means of a first machining tool of the turning machine within the machining area; producing the second partially machined workpiece by: conveying the second semi-finished product through the second opening of the second spindle of the turning machine into the machining area; gripping the second semi-finished product in the second spindle; setting the second semi-finished product in rotation by means of the second spindle and turning a starting region of the second semi-finished product by means of a second machining tool of the turning machine within the machining area; wherein the first partially machined workpiece and the second partially machined workpiece are produced simultaneously. ### Claim 8 (depends on 7) The method according to claim 7, wherein at least one tool revolver is arranged within the machining area for receiving at least one tool for machining the first semi-finished product to be machined and/or the second semi-finished product to be machined, and wherein the at least one tool revolver has a third spindle, which can be set in rotation, for receiving and for rotating the first semi-finished product to be machined and/or the second semi-finished product to be machined; wherein four tool revolvers are arranged within the machining area; wherein two tool revolvers each have a spindle, which can be set in rotation and which are configured to each simultaneously receive and rotate one of the semi-finished products to be machined; wherein the other two tool revolvers are configured to simultaneously machine the simultaneously rotating semi-finished products; wherein production of a finished first workpiece from the partially machined first workpiece also comprises: releasing the gripping of the first semi-finished product in the first spindle following the turning of the first semi-finished product; gripping the previously machined starting region of the first semi-finished product in one of the spindles of the tool revolver; separating the partially machined first workpiece from the first semi-finished product; setting the partially machined first workpiece in rotation by means of this spindle; turning an as yet un-machined starting region of the partially machined first workpiece by means of one of the machining tools of the tool revolver within the machining area; wherein production of a finished second workpiece from the partially machined second workpiece also comprises: releasing the gripping of the second semi-finished product in the second spindle following the turning of the second semi-finished product; gripping the previously machined starting region of the second semi-finished product in the other spindle of the tool revolver; separating the partially machined second workpiece from the second semi-finished product; setting the partially processed second workpiece in rotation by means of this other spindle; and turning an as yet un-machined starting region of the partially machined second workpiece by means of a further of the machining tools of the tool revolver within the machining area. ### Claim 9 A method for producing a workpiece by turning a semi-finished product in a turning machine, the method including steps comprising: providing the turning machine comprising: a first spindle, which can be set in rotation for gripping and rotating a first semi-finished product to be turned; a second spindle, which is opposite the first spindle and can be set in rotation, for gripping and rotating a second semi-finished product to be turned; wherein the first spindle is associated with a first bar load magazine, which is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles; wherein the second spindle is associated with a second bar load magazine, which is configured to convey the second semi-finished product through a second opening of the second spindle into the machining area; producing a partially machined workpiece by machining a starting region of a first end face of the semi-finished product by: conveying the semi-finished product through the first opening of the first spindle of the turning machine into the machining area situated between the spindles; gripping the semi-finished product in the first spindle; setting the semi-finished product in rotation by means of the first spindle; turning the starting region of the semi-finished product by means of a first machining tool of the turning machine within the machining area; producing a finished workpiece from the partially machined workpiece by gripping the turned starting region of the semi-finished product by means of the second spindle, separating the partially machined workpiece from the semi-finished product, machining an end region of the partially machined workpiece remote from the starting region by: gripping the partially machined workpiece in the second spindle; setting the partially machined workpiece in rotation by means of the second spindle; turning the end region of the partially machined workpiece by means of a second machining tool of the turning machine within the machining area, whereby the partially machined workpiece is formed into the finished workpiece; ejecting the finished workpiece from the second spindle. ### Claim 10 (depends on 9) The method according to claim 9, further comprising: advancing an un-machined semi-finished product into the machining area after the separation of the partially machined workpiece from the semi-finished product and, during the machining of the end region of the partially machined workpiece, running through the method steps according to claim 9 again, from the production of a partially machined workpiece by machining a starting region of a first end face of the advanced semi-finished product.