Model Selection Method
Booka has been focusing on vacuum technology for 30 years,booka vacuum products are
produced using imported raw materials and advanced manufacturing processes
Selected map
Countermeasures for problems with vacuum suction system (fault analysis)
Countermeasures for problems with vacuum suction system (fault analysis)
Not suitable for the case
■There is no problem during debugging, and the suction becomes unstable after starting the operation. 【Cause】
The setting of the vacuum switch is not suitable. The supply pressure is unstable, so that the vacuum does not reach the set value. There is a leak between the workpiece and the vacuum chuck.
【Disposal】
（1) (In the case of a vacuum generator, supply pressure), the required vacuum degree is set; and the set pressure of the vacuum switch is set to the required vacuum degree.
（2) There is a leak during commissioning, taking into account the factors that cause damage when absorbing. The vacuum generator, vacuum chuck shape, diameter, material, etc. should be re-evaluated. Perform a reassessment of the vacuum chuck.
The setting of the vacuum switch is not suitable. The supply pressure is unstable, so that the vacuum does not reach the set value. There is a leak between the workpiece and the vacuum chuck.
【Disposal】
（1) (In the case of a vacuum generator, supply pressure), the required vacuum degree is set; and the set pressure of the vacuum switch is set to the required vacuum degree.
（2) There is a leak during commissioning, taking into account the factors that cause damage when absorbing. The vacuum generator, vacuum chuck shape, diameter, material, etc. should be re-evaluated. Perform a reassessment of the vacuum chuck.
■ After the suction cup is replaced, the suction becomes unstable.
【Cause】
●The initial setting conditions are changed (vacuum pressure, vacuum switch setting, position of the suction cup in the height direction, etc.). In the use environment, wear/failure occurs on the suction cup, and the setting is changed.
●When the suction cup is replaced, a leak occurs from the threaded connection portion and the joint portion between the suction cup and the connector.
【Disposal】
(1) The conditions of use (vacuum pressure, set pressure of the vacuum switch, height setting direction of the suction cup, etc.) are to be re-evaluated.
(2) Again, the joint is subject to re-audit.
【Cause】
●The initial setting conditions are changed (vacuum pressure, vacuum switch setting, position of the suction cup in the height direction, etc.). In the use environment, wear/failure occurs on the suction cup, and the setting is changed.
●When the suction cup is replaced, a leak occurs from the threaded connection portion and the joint portion between the suction cup and the connector.
【Disposal】
(1) The conditions of use (vacuum pressure, set pressure of the vacuum switch, height setting direction of the suction cup, etc.) are to be re-evaluated.
(2) Again, the joint is subject to re-audit.
■ The same workpiece is sucked with the same suction cup, and there is a place where it cannot be sucked.
【Cause】
●There is a leak between the workpiece and the vacuum chuck.
●For pneumatic circuits, cylinders, solenoid valves, etc., the same system as the supply circuit of the vacuum generator, and the supply pressure is reduced at the same time. (The degree of vacuum is not reached)
●Leakage occurs from the threaded connection and the mating portion of the suction cup and the connector.
【Disposal】
(1) Suction cup diameter, shape, material, vacuum generator (suction flow rate), etc. should be re-evaluated.
(2) The pneumatic circuit is re-evaluated.
(2) Reconnect the unit for reassessment.
※ Vacuum suction cups are in principle made of metal molds. Therefore, the product has almost no error and the product is stable.
【Cause】
●There is a leak between the workpiece and the vacuum chuck.
●For pneumatic circuits, cylinders, solenoid valves, etc., the same system as the supply circuit of the vacuum generator, and the supply pressure is reduced at the same time. (The degree of vacuum is not reached)
●Leakage occurs from the threaded connection and the mating portion of the suction cup and the connector.
【Disposal】
(1) Suction cup diameter, shape, material, vacuum generator (suction flow rate), etc. should be re-evaluated.
(2) The pneumatic circuit is re-evaluated.
(2) Reconnect the unit for reassessment.
※ Vacuum suction cups are in principle made of metal molds. Therefore, the product has almost no error and the product is stable.
■ The workpiece and the suction cup cannot be separated, and the organ type suction cup has rubber adhesion.
【Cause】
●The general properties of rubber are tacky. Adhesion increases depending on the use environment (wearing of the suction cup).
● Using the necessary degree of vacuum, it is assumed that the above force (adhesiveness of the rubber itself + pressing force on the vacuum pressure) is generated on the suction cup (rubber) portion.
【Disposal】
(1) Re-evaluate the shape, material, and quantity of the vacuum chuck.
(2) Reduce the vacuum. Since the degree of vacuum is lowered, the suction force is insufficient, and the failure of the workpiece is conveyed, the number of suction cups can be increased, and the diameter of the suction cup can be
【Cause】
●The general properties of rubber are tacky. Adhesion increases depending on the use environment (wearing of the suction cup).
● Using the necessary degree of vacuum, it is assumed that the above force (adhesiveness of the rubber itself + pressing force on the vacuum pressure) is generated on the suction cup (rubber) portion.
【Disposal】
(1) Re-evaluate the shape, material, and quantity of the vacuum chuck.
(2) Reduce the vacuum. Since the degree of vacuum is lowered, the suction force is insufficient, and the failure of the workpiece is conveyed, the number of suction cups can be increased, and the diameter of the suction cup can be
■ If it is installed with a nut, the buffering action is not smooth and there is no slippage.
【Cause】
●When the buffer is installed, the nut tightening torque value is high.
● On the sliding part, dust adheres or causes scratches.
● A lateral load is applied to the piston rod to produce a partial wear.
【Disposal】
Assembly with the recommended tightening torque.Depending on the conditions of use and use environment, the nut may be loose. Regular maintenance is required.
【Cause】
●When the buffer is installed, the nut tightening torque value is high.
● On the sliding part, dust adheres or causes scratches.
● A lateral load is applied to the piston rod to produce a partial wear.
【Disposal】
Assembly with the recommended tightening torque.Depending on the conditions of use and use environment, the nut may be loose. Regular maintenance is required.
Vacuum cup replacement period
●Since the vacuum chuck is a consumable item, it must be replaced periodically.
●When the vacuum chuck is often used, the suction surface is worn and the shape is gradually reduced. Since the diameter of the suction cup becomes smaller, the suction force is reduced, and suction is possible.
●It is speculated that the replacement period of the vacuum chuck has great difficulty. This is affected by surface roughness, use environment (temperature, humidity, ozone, solvent, etc.), use conditions (vacuum degree, workpiece weight, pressing force of the vacuum chuck to the workpiece, presence or absence of buffering, etc.).
●Therefore, the replacement period of the vacuum chuck refers to the condition of the initial use, and the customer can judge according to the replacement period of the vacuum chuck.
●In addition, depending on the conditions of use and the environment of use, the screws may be loose. Regular maintenance is required.
●When the vacuum chuck is often used, the suction surface is worn and the shape is gradually reduced. Since the diameter of the suction cup becomes smaller, the suction force is reduced, and suction is possible.
●It is speculated that the replacement period of the vacuum chuck has great difficulty. This is affected by surface roughness, use environment (temperature, humidity, ozone, solvent, etc.), use conditions (vacuum degree, workpiece weight, pressing force of the vacuum chuck to the workpiece, presence or absence of buffering, etc.).
●Therefore, the replacement period of the vacuum chuck refers to the condition of the initial use, and the customer can judge according to the replacement period of the vacuum chuck.
●In addition, depending on the conditions of use and the environment of use, the screws may be loose. Regular maintenance is required.
