Press shutheight adjustment using hydraulic tie rod assemblies
First Claim
Patent Images
1. A press comprising:
- a crown and a bed attached together by a frame;
a slide attached to said crown for reciprocating movement in opposed relation to said bed;
a plurality of tie rods connecting between said crown and said bed;
a plurality of pressure activated tie rod nut assemblies attached to said tie rods so that when activated, said nut assemblies force said crown and said bed closer together;
a shutheight measuring means for measuring the shutheight of said press, said measuring means attached to said press; and
feedback means connected to said shutheight measuring means and said tie rod nut assemblies for comparing a predetermined desired shutheight to the shutheight measured by said measuring means and pressure activating said tie rod nut assemblies when the measured shutheight deviates from the predetermined shutheight, whereby shutheight is controlled.
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Abstract
A shutheight adjustment system incorporating hydraulic tie rod nut assemblies for dynamically altering the tensioning and compression of the tie rods of a power press. Each hydraulic tie rod nut assembly includes a cylinder with an inner sliding piston threadably engaging the tie rod. A pressurizing mechanism injects pressurized fluid within a chamber formed by the piston and cylinder. By increasing pressure within the chamber of the hydraulic tie rod nut assembly, compression between the press bed and press crown may be increased thereby reducing the press shutheight.
33 Citations
16 Claims
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1. A press comprising:
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a crown and a bed attached together by a frame;
a slide attached to said crown for reciprocating movement in opposed relation to said bed;a plurality of tie rods connecting between said crown and said bed; a plurality of pressure activated tie rod nut assemblies attached to said tie rods so that when activated, said nut assemblies force said crown and said bed closer together; a shutheight measuring means for measuring the shutheight of said press, said measuring means attached to said press; and feedback means connected to said shutheight measuring means and said tie rod nut assemblies for comparing a predetermined desired shutheight to the shutheight measured by said measuring means and pressure activating said tie rod nut assemblies when the measured shutheight deviates from the predetermined shutheight, whereby shutheight is controlled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A press comprising:
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a crown and a bed attached together by a frame;
a slide attached to said crown for reciprocating movement in opposed relation to said bed;a plurality of tie rods connecting between said crown and said bed; a plurality of pressure activated tie rod nut assemblies each including a cylinder block having a cylinder bore fit about said tie rod, a piston threadedly engaged about said tie rod and slidably disposed within s id cylinder bore thereby forming an inner chamber, said inner chamber pressurized with a liquid, and a tie rod nut threadably engaged about said tie rod and engaging said piston so that an increase in pressure within said inner chamber forces said tie rod nut away from said cylinder block; a shutheight measuring means for measuring the shutheight of said press, said measuring means operatively associated with said press; and feedback means connected to said shutheight measuring means and to said tie rod nut assemblies for comparing a predetermined desired shutheight to the shutheight measured by said measuring means and altering the pressure within each said inner chamber when the measured shutheight deviates from the predetermined shutheight, whereby shutheight is controlled. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification