Upper tool for press brake
AssigneeAmada Metrecs Company, Limited
InventorSusumu Kawano
Life of this patent
Estimating the term…
Abstract
An upper tool for a press brake includes a push actuating section (9K, 107, 9U) for actuating upward an actuated member (17, 103P, 121) movable up and down, in a clamping force increasing mechanism such that an upper tool clamping force can be increased gradually when the actuated member (17, 103P, 121) mounted on an upper holder device (1) of the press brake is moved upward. An example of the push actuating section is a lower surface of an engage groove portion (9K) extending horizontally and formed in any of front and rear surfaces of the upper tool (9). Further, the engage groove portion (9K) is formed between a vertical position roughly the same as a holder contact surface (9F) formed at a shoulder portion of the upper tool (9) and another vertical position slightly lower than an upper end of the upper tool.
Claims13
An upper tool assembly for a press brake, comprising:
- an upper tool holder device having a holder body provided with a support plate and an upper tool clamp pivotably attached to said holder body and providing a clamping force;
- said support plate having a lower surface and a side surface for engaging with an upper tool, said upper tool clamp having a lower portion and an upper portion;
- a wedge-shaped member located at said lower portion of said upper tool clamp and movable in a vertical up and down direction from said lower portion of said upper tool clamp toward said upper portion of said upper tool clamp;
- an upper tool having a longitudinal wedge-pushing up portion formed therein transverse to said vertical up and down direction for pushing upward said wedge-shaped member, a contact surface for contacting said support plate lower surface, a slide surface for slidably contacting said support plate side surface, and a processing portion for processing a workpiece, said upper tool removably positionable above a workpiece to be processed and attachable between said support plate and said upper tool clamp;
- wherein movement of said upper tool vertically upward relative to said support plate causes engagement of said wedge pushing-up portion and said wedge-shaped member so as to increase the upper tool clamping force of said upper tool clamp.
An upper tool assembly for a press brake, comprising:
- an upper tool holder device having a holder body provided with a support plate and an upper tool clamp pivotally attached to said holder body and providing a clamping force;
- said support plate having a lower surface and a side surface for engaging with an upper tool, said upper tool clamp having a lower portion and an upper portion;
- a wedge-shaped member located at said lower portion of said upper tool clamp and movable in a vertical up and down direction from said lower portion of said upper tool clamp toward said upper portion of said upper tool clamp, said wedge-shaped member having a stop projection formed therein;
- an upper tool having a longitudinal engagement groove portion formed therein transverse to said vertical up and down direction and engageable with and disengageable from said wedge-shaped member stop projection for pushing upward said wedge-shaped member, a contact surface for contacting said support plate lower surface, a slide surface for slidably contacting said support plate said surface, and a processing portion for processing a workpiece, said upper tool removeably positionable above a workpiece to be processed and attachable between said support plate and said upper tool clamp;
- wherein movement of said upper tool vertically upward relative to said support plate causes engagement of said tool engagement groove and said wedge-shaped member stop projection so as to increase the upper tool clamping force of said upper tool clamp.
An upper tool assembly for a press brake, comprising:
- an upper tool holder device having a holder body provided with a support plate and an upper tool clamp pivotally attached to said holder body and providing a clamping force;
- said support plate having a lower surface and a side surface for engaging with an upper tool, said upper tool clamp having a lower portion and an upper portion;
- a wedge-shaped member located at said lower portion of said upper tool clamp and movable in a vertical up and down direction from said lower portion of said upper tool clamp toward said upper portion of said upper tool clamp, said wedge-shaped member having a longitudinal stop groove formed therein;
- an upper tool having a longitudinal engagement projection formed therein transverse to said vertical up and down direction and engageable with and disengageable from a contact surface for contacting said support plate lower surface, a slide surface for slidably contacting said support plate side surface, and a processing portion for processing a workpiece, said upper tool removably positionable above a workpiece to be processed and attachable between said support plate and said upper tool clamp;
- wherein movement of said upper tool vertically upward relative to said support plate causes engagement of said upper tool engagement projection and said wedge-shaped member stop groove so as to increase the upper tool clamping force of said upper tool clamp.
Dependencies are inferred from the claim text.