Press machine braking performance verifying apparatus
First Claim
Patent Images
1. A press machine braking performance verifying apparatus for verifying performance of brakes which apply braking to a slide of a press machine, the press machine braking performance verifying apparatus comprising:
- a slide speed sensor configured to detect a slide driving speed at which the slide is driven and output a slide speed signal indicating the detected slide driving speed; and
a controller arranged to receive the slide speed signal from the slide speed sensor and to receive an emergency stop instruction signal from an emergency stop instruction device of the press machine, the emergency stop instruction signal being a signal instructing the slide to be stopped,the controller being programmed tomeasure a stopping time from when a stopping instruction is detected until the slide stops, the stopping time being a sum of an idle time from detecting of a stopping instruction until a start of braking and a braking time from the start of braking until stopping of the slide,calculate a predicted stopping time in a case where the slide is driven at a maximum driving speed bydetermining a deceleration coefficient based onthe slide driving speed at a predetermined timing during the braking time andan amount of time from the predetermined timing to stopping of the slide,calculating a fixed stopping time by adding the idle time to the time from the start of braking until the predetermined timing, andcalculating the predicted stopping time based on a fixed stopping time, the maximum driving speed of the slide, and the deceleration coefficient,execute a performance evaluation of the brakes by comparing the predicted stopping time and abnormal threshold value set in advance, andlimit operation of the slide if the performance evaluation indicates a braking performance failure.
1 Assignment
0 Petitions
Accused Products
Abstract
A press machine braking performance verifying apparatus verifies performance of brakes applying braking to a slide. The press machine braking performance verifying apparatus includes a speed detecting component, a stopping instruction detecting component, a stopping time measuring component, a maximum stopping time calculating component and an evaluating component. The speed detecting component detects a slide driving speed. The stopping instruction detecting component detects if stopping of the slide is instructed. The stopping time measuring component measures a stopping time until the slide stops when a stopping instruction is detected. The maximum stopping time calculating component calculates predicted stopping time in a case where the slide is driven at a maximum driving speed based on the slide driving speed after detecting the stopping instruction and the stopping time. The evaluating component evaluates performance of the brakes by comparing the predicted stopping time and a threshold valve set in advance.
40 Citations
18 Claims
-
1. A press machine braking performance verifying apparatus for verifying performance of brakes which apply braking to a slide of a press machine, the press machine braking performance verifying apparatus comprising:
-
a slide speed sensor configured to detect a slide driving speed at which the slide is driven and output a slide speed signal indicating the detected slide driving speed; and a controller arranged to receive the slide speed signal from the slide speed sensor and to receive an emergency stop instruction signal from an emergency stop instruction device of the press machine, the emergency stop instruction signal being a signal instructing the slide to be stopped, the controller being programmed to measure a stopping time from when a stopping instruction is detected until the slide stops, the stopping time being a sum of an idle time from detecting of a stopping instruction until a start of braking and a braking time from the start of braking until stopping of the slide, calculate a predicted stopping time in a case where the slide is driven at a maximum driving speed by determining a deceleration coefficient based on the slide driving speed at a predetermined timing during the braking time and an amount of time from the predetermined timing to stopping of the slide, calculating a fixed stopping time by adding the idle time to the time from the start of braking until the predetermined timing, and calculating the predicted stopping time based on a fixed stopping time, the maximum driving speed of the slide, and the deceleration coefficient, execute a performance evaluation of the brakes by comparing the predicted stopping time and abnormal threshold value set in advance, and limit operation of the slide if the performance evaluation indicates a braking performance failure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A press machine braking performance verifying apparatus for verifying performance of brakes which apply braking to a slide of a press machine, the press machine braking performance verifying apparatus comprising:
-
a slide speed sensor configured to detect a slide driving speed at which the slide is driven and output a slide speed signal indicating the detected slide driving speed; a controller arranged to receive the slide speed signal from the slide speed sensor and to receive an emergency stop instruction signal from an emergency stop instruction device of the press machine, the emergency stop instruction signal being a signal instructing the slide to be stopped; and an indication device configured and arranged to be operated by signals from the controller, the controller being programmed to measure a stopping time from when a stopping instruction is detected until the slide stops, the stopping time being a sum of an idle time from detecting of a stopping instruction until a start of braking and a braking time from the start of braking until stopping of the slide, calculate a predicted stopping time in a case where the slide is driven at a maximum driving speed by determining a deceleration coefficient based on the slide driving speed at a predetermined timing during the braking time and an amount of time from the predetermined timing to stopping of the slide, calculating a fixed stopping time by adding the idle time to the time from the start of braking until the predetermined timing, and calculating the predicted stopping time based on a fixed stopping time, the maximum driving speed of the slide, and the deceleration coefficient, execute a performance evaluation of the brakes by comparing the predicted stopping time and a threshold value set in advance, and output a notification signal indicating a result of the performance evaluation to the indication device. - View Dependent Claims (16, 17)
-
-
18. A press machine, comprising
a slide; -
a brake arranged and configured to brake the slide; a slide speed sensor configured to detect a slide driving speed at which the slide is driven and output a slide speed signal indicating the detected slide driving speed; an emergency stop instruction device configured to generate an emergency stop instruction signal, the emergency stop instruction signal being a signal instructing the slide to be stopped; and a controller programmed to control operation of the slide and the brake, the controller arranged to receive the slide speed signal from the slide speed sensor and to receive the emergency stop instruction signal from the emergency stop instruction device, the controller including a press machine braking performance verifying section programmed to measure a stopping time from when a stopping instruction is detected until the slide stops, the stopping time being a sum of an idle time from detecting of a stopping instruction until a start of braking and a braking time from the start of braking until stopping of the slide, calculate a predicted stopping time in a case where the slide is driven at a maximum driving speed by determining a deceleration coefficient based on the slide driving speed at a predetermined timing during the braking time and an amount of time from the predetermined timing to stopping of the slide, calculating a fixed stopping time by adding the idle time to the time from the start of braking until the predetermined timing, and calculating the predicted stopping time based on a fixed stopping time, the maximum driving speed of the slide, and the deceleration coefficient, and execute a performance evaluation of the brakes by comparing the predicted stopping time and a threshold value set in advance.
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeKomatsu Industries Corporation (Komatsu)
-
Original AssigneeKomatsu Industries Corporation (Komatsu)
-
InventorsSakurai, Hitoshi, Douba, Eiji, Takada, Masaaki, Takeuchi, Hisanori
-
Primary Examiner(s)DUNN, DARRIN D
-
Application NumberUS14/128,073Publication NumberTime in Patent Office1,282 DaysField of SearchUS Class Current1/1CPC Class CodesB30B 12/00 Presses not provided for in...B30B 15/148 Electrical control arrangem...G01L 5/284 Measuring braking-time or b...
