Read 3 answers by scientists with 1 recommendation from their colleagues to the question asked by Daniel Martinez Krahmer on Dec 17, JIS B Mechanical power presses — Testing of the accuracy (FOREIGN STANDARD. Find the most up-to-date version of JIS B at Engineering
|Published (Last):||4 December 2016|
|PDF File Size:||8.78 Mb|
|ePub File Size:||10.12 Mb|
|Price:||Free* [*Free Regsitration Required]|
Frame is stretched by three times This three time figure shows the maximum applied load of the press. Standard bolster with T-slots. On the contrary, cold working uis or stamping of steel plate with many edge burrs indicates large figures on the load gauge even if energy adjustment is relatively small. Basically, eccentric load out of the screw diameter should be avoided.
Therefore, the press needs to have emergency stop mechanism if the overload happened. It is just a matter of revolution energy usage whether it is used for work piece compression or the frame deformation. It would be accurately machined and ground finished and so designed to ensure optimum factor of safety.
Pneumatic balancer for slide 2 nos.
Our company does not employ this method because in case of hardened spring adjustment of the torque jie by mistake, machine jiw always running with overload and finally machine may brake. Naturally, if you form product under the same condition, the slide speed adjustment is proportional to the load gauge display.
Rotary 3 position Cam Limit Switch. Dual Sensing Solenoid valve. Also, these are proportional to slide descending speed, too. It’s hardly recognizable to the operator if the torque limiter functions under the overload condition.
During work process like vertical compression of heated bar material, the energy is consumed for plastic deformation of the material mostly and the frame bears very small amount of load shown low value on the load gauge. Two independent load display for each side simply shows one sided load and the total load is defined as screw press load.
The required speed is previously set on touch panel or by setting dial. Squirrel Cage Electric Motor. The flywheel revolution is sequentially controlled 66402 a servomotor direct driven system without clutch transmission. Machine life is drastically shortened if the press is used under three more times of nominal capacity maximum capacity repeatedly usually, the screw and the frame get damage.
The load gauge simply displays the result of jiss many kN loaded to the frame. The capacity of screw press should be used with the nominal capacity. Especially, in those large edge burrs and cold working, it could become out of the allowable load even if the forming energy value is still a half of it.
Here a problem occurs how much the allowable applied load of a press being set witch coming from rigidity design of machine. The load that can be allowable becomes reducing when it becomes far from the center. In this status, compress the testing work piece and detect the frame deformation through strain gauge to show kN value on a load gauge.
SPECIFICATIONS MODEL : ‘ESR’
You may recognize from ijs above discussion that the load gauge display quite differs when smash up a test piece or strike die against die even if the forming energy is the same.
This accurately machined steel fabricated box type slide runs in extra long gibs fitted with PB liners, eliminating any possibility of tilting and maintains the parallelism of face even at off center loading.
We are taking the method that the machine gives warning signal to operator through LED lamp when the machine jus in overload emergency stop status from electric signal of the load gauge. In screw press, the flywheel revolution energy jls consumed one hundred percent in each press cycle.
As explained earlier, the press can compress a test piece with nominal capacity, however, it is absolutely impossible to do with the allowable capacity. Its control is where the point jiz clutch off, not revolution control like inverter motor. In other word, as the compression value for the testing piece is criterion, set the figures of equivalent amount on the load gauge.
JIS-B | Mechanical power presses — Testing of the accuracy | Document Center, Inc.
The machine is made operational by pushing the reset button. It becomes quite expensive machine though we could manufacture it. Web Design City Dubai. Crank Shaft The Crank 6042 would be of forged and normalized medium carbon steel to ensure toughness and shock resistance. Suitable centralized Motorised Lubrication Pump.
That means that there exists a risk that the machine is used under overload situation without knowing.
JIS B – Mechanical power presses — Testing of the accuracy (FOREIGN STANDARD)
Because the press is designed to deform product, not for assuming of crashing tools themselves repeatedly. The clutch is engaged through air pressure. We are taking the method that the machine gives warning signal to operator through LED lamp when the machine is in overload emergency stop status from electric signal of the load gauge note We don’t use the torque limiter approach attached to the flywheel discharging overload energy.
At the time of iis, by exceeding the rating capacity tonnage, the sensitive Hydraulic Overload Protection device senses the overload with a millisecond and immediately stops the machine. The screw press of kN; Set the load gauge that shows figures of when uis testing work piece is compressed with the equivalent of kN. In case of the operation, hard-on-hard, in which striking die against die jjis the same condition as jos above item? The frames are stress relieved before machining. Hydraulic Overload Protection The machine is equipped with a standard pneumatically operated hydraulic overload safety device.
When you set up two strain gauges at each side of the frame, the load on one side frame equals to a half of the load becomes setting value and shown as certain kN in RH and LH independently, plus total kN in the display. You can adjust the slide speed freely adjustable forming energy freelyjix, you can’t control how many kN to strike.
Using the allowable capacity is disputable from the point of fair business transaction. Since the screw press has jsi mechanical lower-dead-point, the machine never stops caused from overload stick like the crank press machine.
This prevents any damage to the tool and to the press. Hydraulic Overload safety device.