초록 ▼

A method of manufacturing a turbine blade retainer using a material cutting device and a material bending device includes steps for suspending a bar stock material between a polyurethane shock absorber and a bore of a cutting jig support, moving the cutting punch downward to press the distal end of

A method of manufacturing a turbine blade retainer using a material cutting device and a material bending device includes steps for suspending a bar stock material between a polyurethane shock absorber and a bore of a cutting jig support, moving the cutting punch downward to press the distal end of the bar stock material into the shock absorber and then cut the bar stock material to thereby generate a blank, clamping the blank between a bending punch and a receiving slide by pressing the bending punch against the receiving slide, bending the distal end of the blank against a chamfered section of a bending support in response to continued downward motion of the bending punch to thereby form a blade retainer precursor, and milling the blade retainer precursor to form the blade retainer. Corresponding devices for performing these steps are also described.

대표청구항 ▼

1. A method of operating a manufacturing system having a material cutting device including a cutting punch having a cutting edge, first and second cutting jig supports having first and second faces, respectively, disposed in parallel a predetermined distance from one another, the first cutting jig s

1. A method of operating a manufacturing system having a material cutting device including a cutting punch having a cutting edge, first and second cutting jig supports having first and second faces, respectively, disposed in parallel a predetermined distance from one another, the first cutting jig support including a passage sized to receive a bar stock material having a predetermined shape, the second cutting jig support including a cutting stopper, and a shock absorbing material, wherein the shock absorbing material is a material that rapidly absorbs vibrations, the shock absorbing material having one surface perpendicular to the second face and proximate to the cutting stopper, and wherein the manufacturing system further includes a material bending device, which is separate from the material cutting device, including a bending punch, an upright bending support having a chamfered portion, and a receiving slide supported by at least one spring and opposing the bending punch, to produce a generally L-shaped workpiece, the method comprising:supporting the bar stock material between the shock absorbing material and the first cutting jig support, wherein a distal end of the bar stock material contacts the cutting stopper, and a section of the bar stock material between the first cutting jig support and the shock absorbing material is unsupported;moving the cutting punch downward so as to press the distal end of the bar stock material into the shock absorbing material and the cutting stopper and then cut the bar stock material to thereby produce a blank;subsequently, in the material bending device, clamping the blank between the bending punch and the receiving slide by pressing the bending punch against the receiving slide; andbending the distal end of the blank against the chamfered portion of the bending support in response to continued downward motion of the bending punch to thereby form the L-shaped workpiece.2. A method of manufacturing a blade retainer for holding a gas turbine blade using a material cutting device including a cutting punch having a cutting edge, first and second cutting jig supports having first and second faces, respectively, disposed in parallel a predetermined distance from one another, the first cutting jig support including a passage sized to receive a bar stock material having a predetermined shape, the second cutting jig support including a cutting stopper, and a shock absorbing material, wherein the shock absorbing material is a material that rapidly absorbs vibrations, the shock absorbing material having one surface perpendicular to the second face and proximate to the cutting stopper, and wherein the manufacturing system further includes a material bending device, which is separate from the material cutting device, including a bending punch, an upright bending support having a chamfered portion, and a receiving slide supported by at least one spring and opposing the bending punch, the method comprising:supporting the bar stock material between the shock absorbing material and the first cutting jig support, wherein a distal end of the bar stock material contacts the cutting stopper, and a section of the bar stock material between the first cutting jig support and the shock absorbing material is unsupported;moving the cutting punch downward so as to press the distal end of the bar stock material into the shock absorbing material and the cutting stopper and then cut the bar stock material to thereby cut a blank from the bar stock material;subsequently, in the material bending device, clamping the blank between the bending punch and the receiving slide by pressing the bending punch against the receiving slide;bending the distal end of the blank against the chamfered portion of the bending support in response to continued downward motion of the bending punch to thereby form a blade retainer precursor; andmilling the blade retainer precursor to thereby form the blade retainer.3. The method as recited in claim 2, wherein the shock absorbing material comprises polyurethane.4. The method as recited in claim 2, wherein:the cutting stopper includes a shock damper comprising polyurethane; andthe supporting step comprises supporting the bar stock material such that the bar stock material is in contact with the shock damper.5. The method as recited in claim 2, wherein the force clamping the bending punch and the receiving slide is greater than the force required to bend the blank.6. The method as recited in claim 5, wherein the clamping force is determined by the spring constant of the at least one spring supporting the receiving slide.7. The method as recited in claim 5, wherein the clamping force is determined by the constant spring of the at least one spring and the resiliency of a polyurethane shim resisting downward motion of the receiving slide.8. A blade retainer material cutting device for cutting a blank from a bar stock material, comprising:a cutting base;first and second cutting jig supports disposed in parallel with one another and perpendicular to the cutting base, the first and second cutting jig supports being separated from one another by a predetermined distance;a shock absorbing material supported by the cutting base and adjacent to the second cutting jig support, wherein the shock absorbing material includes one of polyurethane, synthetic resin other than polyurethane, and rubber; anda cutting punch including a cutting edge disposed between the first and second cutting jig supports with the cutting edge disposed proximate to the first cutting jig support, the cutting punch being separated from the first cutting jig support be a predetermined interval, wherein:the first cutting jig support includes a passage sized to admit the bar stock material;the second cutting jig support includes a cutting stopper contacting the distal end of the bar stock material to thereby determine the length of the bar stock material disposed between the first and second cutting jig supports;the bar stock material is unsupported between the first cutting jig support and the shock absorbing material prior to cutting the blank; andmotion of the cutting punch with respect to the bar stock material presses the distal end of the bar stock material against the shock absorbing material and clamps the bar stock material between the cutting punch and the shock absorbing material.9. The device blade retainer material cutting device as recited in claim 8, wherein the cutting stopper further comprises a shock damper.10. The device blade retainer material cutting device as recited in claim 9, wherein the shock damper comprises polyurethane.11. The blade retainer material cutting device as recited in claim 8, wherein the cutting punch further comprises a groove having a cross-section matching the profile of the bar stock material, the groove intersecting the cutting edge of the cutting punch.12. The blade retainer material cutting device as recited in claim 8, wherein:the cutting edge of the cutting punch comprises first and second cutting edges; andthe cutting punch further comprises first and second grooves each having a cross-section matching the profile of the bar stock material, the first and second grooves forming a cruciform shape and intersecting a respective one of the cutting edges of the cutting punch.13. The blade retainer material cutting device as recited in claim 8, wherein:the cutting edge of the cutting punch comprises first and second cutting edges and third and fourth cutting edges, the first and second cutting edges included in a first end of the cutting punch and the third and fourth cutting edges included in a second end of the cutting punch; andthe cutting punch further comprises:first and second grooves, disposed in the first end of the cutting punch, each of the first and second groves having a cross-section matching the profile of the bar stock material, the first and second grooves forming a cruciform shape and intersecting a respective one of the first and second cutting edges of the cutting punch; andthird and fourth grooves, disposed in the second end of the cutting punch, each of the third and fourth groves having a cross-section matching the profile of the bar stock material, the third and fourth grooves forming a cruciform shape and intersecting a respective one of the third and fourth cutting edges of the cutting punch.14. A blade retainer material bending device, comprising:a base;a bending jig support, coupled to the base, having first and second surfaces, the first surface having a first groove accommodating the distal end of a blank, the bending jig support having a chamfered portion of predetermined radius intersecting the groove and the second surface;a receiving slide having a second groove conforming to the profile of the blank in an upper surface of the receiving slide;a shaft that maintains the receiving slide in a predetermined position relative to the base while permitting up and down movement of the receiving slide with respect to the base;a spring operatively coupling the receiving slide to the base, the spring opposing the downward motion of the receiving slide;a polyurethane shim disposed between the receiving slide and the base; anda bending punch possessing a lower surface that is parallel to the upper surface of the receiving slide, wherein a clamping force applied to the blank by the receiving slide is determined by the spring constant of the spring and the rigidity of the polyurethane shim.15. The blade retainer material bending device as recited in claim 14, wherein the force generated by the spring is greater than the force required to bend the blank.16. A blade retainer manufacturing system, comprising:a material cutting device that cuts a blank from bar stock material, the cutting device including:a cutting base;first and second cutting jig supports disposed in parallel with one another and perpendicular to the cutting base, the first and second cutting jig supports being separated from one another by a predetermined distance;a shock absorbing material supported by the cutting base and adjacent to the second cutting jig support;a cutting punch including a cutting edge disposed between the first and second cutting jig supports with the cutting edge disposed proximate to the first cutting jig support, the cutting punch being separated from the first cutting jig support by a predetermined interval; anda blade retainer material bending device, including:a bending base;a bending jig support, coupled to the bending base, having first and second surfaces, the first surface having a first groove accommodating the distal end of a blank, the bending jig support having a chamfered portion of predetermined radius intersecting the groove and the second surface;a receiving slide having a second groove conforming to the profile of the blank in an upper surface of the receiving slide;a shaft that maintains the receiving slide in a predetermined position relative to the base while permitting up and down movement of the receiving slide with respect to the base;a spring operatively coupling the receiving slide to the base, the spring opposing the downward motion of the receiving slide; anda bending punch possessing a lower surface that is parallel to the upper surface of the receiving slide, wherein:the bending punch is separate from the cutting punch and operates at a different time than the cutting punch;the first cutting jig support includes a passage sized to admit the bar stock material;the second cutting jig support includes a cutting stopper contacting the distal end of the bar stock material to thereby determine the length of the bar stock material disposed between the first and second cutting jig supports;the bar stock material is unsupported between the first cutting jig support and the shock absorbing material prior to cutting the blank; andmotion of the cutting punch with respect to the bar stock material presses the distal end of the bar stock material against the shock absorbing material and clamps the bar stock material between the cutting punch and the shock absorbing material.17. The blade retainer manufacturing system as recited in claim 16, wherein the shock absorbing material comprises polyurethane.18. The blade retainer manufacturing system as recited in claim 16, wherein the cutting punch further comprises a groove having a cross-section matching the profile of the bar stock material, the groove intersecting the cutting edge of the cutting punch.19. The blade retainer manufacturing system as recited in claim 16, wherein:the cutting edge of the cutting punch comprises first and second cutting edges; andthe cutting punch further comprises first and second grooves each having a cross-section matching the profile of the bar stock material, the first and second grooves forming a cruciform shape and intersecting a respective one of the cutting edges of the cutting punch.20. The blade retainer manufacturing system as recited in claim 16, wherein:the cutting edge of the cutting punch comprises first and second cutting edges and third and fourth cutting edges, the first and second cutting edges included in a first end of the cutting punch and the third and fourth cutting edges included in a second end of the cutting punch; andthe cutting punch further comprises:first and second grooves, disposed in the first end of the cutting punch, each of the first and second groves having a cross-section matching the profile of the bar stock material, the first and second grooves forming a cruciform shape and intersecting a respective one of the first and second cutting edges of the cutting punch; andthird and fourth grooves, disposed in the second end of the cutting punch, each of the third and fourth groves having a cross-section matching the profile of the bar stock material, the third and fourth grooves forming a cruciform shape and intersecting a respective one of the third and fourth cutting edges of the cutting punch.21. The blade retainer manufacturing system as recited in claim 16, wherein the force generated by the spring is greater than the force required to bend the blank.22. The blade retainer manufacturing system as recited in claim 16, wherein:the blade retainer material bending device further comprises a polyurethane shim disposed between the receiving slide and the base; andthe clamping force is determined by the spring constant of the spring and the rigidity of the polyurethane shim.