Vacuum handling apparatus

Patent metadata

Field	Value
Publication number	US-10625429-B2
Application number	US-201916391532-A
Country	US
Kind code	B2
Filing date	Apr 23, 2019
Priority date	May 4, 2018
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A method for operating a vacuum handling apparatus, in particular for a human-machine-collaboration system, a vacuum gripper can be connected to a primary vacuum system to generate a vacuum, the method includes the following steps applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system; holding the workpiece during its handling by means of the vacuum prevailing in the vacuum gripper, and monitoring at least one state variable during the handling; and generating an auxiliary vacuum in the vacuum gripper by a self-sufficient, secondary auxiliary vacuum system if the monitored state variable deviates from a target state.

First claim

What is claimed is:

1. A method for the operation of a vacuum handling apparatus comprising a vacuum gripper connectable to a primary vacuum system to generate a vacuum, the method comprising the steps of:
a. applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system;
b. holding the workpiece during its handling by means of the vacuum prevailing in the vacuum gripper, and monitoring at least one state variable during the handling; and
c. generating an auxiliary vacuum in the vacuum gripper by means of a self-sufficient, secondary auxiliary vacuum system if the monitored state variable deviates from a target state.

2. The method according to claim 1 , wherein in step b) the primary operating power used to operate the primary vacuum system is monitored as a state variable, and step c) is carried out in the event of a detected failure of the primary operating power.

3. The method according to claim 1 , wherein in step c) an action is triggered in addition.

4. The method according to claim 3 , wherein the action comprises issuing a warning signal, wherein the action comprises at least one of interrupting the movement of the vacuum handling apparatus and moving the vacuum handling apparatus to a safe, final state.

5. The method according to claim 1 , wherein in step b) the pressure and/or the pressure change in the vacuum gripper is detected as a state variable, and wherein step c) is carried out if the pressure and/or the pressure change in the vacuum gripper exceeds a threshold value.

6. The method according to claim 1 , wherein a diagnostic cycle is carried out before step a), and the diagnostic cycle comprises the steps of:
a. applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system;
b. detecting the change in pressure in the vacuum gripper over time; and
c. verifying whether the planned handling by means of the vacuum handling apparatus can be carried out safely.

7. The method according to claim 6 , wherein the diagnostic cycle is carried out during the handling of the workpiece.

8. The method according to claim 1 , wherein a diagnostic cycle is carried out before step a), and the diagnostic cycle comprises the steps of:
a. detecting the workpiece which is to be handled;
b. determining from a database a stored target pressure-change over time that is necessary for carrying out the steps of applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system, and detecting the change in pressure in the vacuum gripper over time; and
c. verifying whether the planned handling by means of the vacuum handling apparatus can be carried out safely.

9. The method according to claim 8 , wherein after the determination of the target pressure-change from the database, a diagnostic cycle is carried out before step a), and the diagnostic cycle comprises the steps of:
a. applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system;
b. detecting the change in pressure in the vacuum gripper over time; and
c. verifying whether the planned handling by means of the vacuum handling apparatus can be carried out safely,
d. wherein the target pressure change over time is compared to the actual, measured pressure change, and based on this, a verification is made as to whether the planned handling by means of the vacuum handling apparatus can be carried out safely.

10. The method according to claim 8 , wherein a test cycle is carried out before the diagnostic cycle, and wherein the diagnostic cycle comprises the steps of:
a. applying the vacuum gripper to a workpiece and building up a vacuum in the vacuum gripper by means of the primary vacuum system;
b. detecting the change in pressure in the vacuum gripper over time; and
c. verifying whether the planned handling by means of the vacuum handling apparatus can be carried out safely; and
d. detecting and storing a target pressure change for at least one workpiece and/or a state of the vacuum handling apparatus.

11. A vacuum handling apparatus, comprising a vacuum gripper and a primary vacuum system for generating a vacuum for operating the vacuum gripper, wherein the vacuum gripper comprises a secondary, auxiliary vacuum system, and wherein the auxiliary vacuum system is designed for at least one of self-sufficient generation and provision of an auxiliary vacuum in the vacuum gripper independently of an external power supply, whereby the vacuum handling apparatus is adapted to:
a. apply the vacuum gripper to a workpiece and build up a vacuum in the vacuum gripper by means of the primary vacuum system;
b. hold the workpiece during its handling by means of the vacuum prevailing in the vacuum gripper, and monitor at least one state variable during the handling; and
c. generate an auxiliary vacuum in the vacuum gripper by means of a self-sufficient, secondary auxiliary vacuum system if the monitored state variable deviates from a target state.

12. The vacuum handling apparatus according to claim 11 , wherein a control device is provided which is designed and adapted to carry out the method according to any one of the preceding claims, and wherein the control device particularly comprises a sensor device for monitoring the state variable, and wherein an auxiliary power device is provided for self-sufficient operation of the auxiliary vacuum system.

13. The vacuum handling apparatus according to claim 11 , wherein the vacuum gripper comprises a warning device.

14. The vacuum handling apparatus according to claim 11 , wherein the vacuum gripper comprises a suction body, and wherein a protective element for protecting the suction body from damage is arranged on the vacuum gripper.

15. A human-machine collaboration system, comprising a vacuum handling apparatus comprising:
a. a vacuum gripper and a primary vacuum system for generating a vacuum for operating the vacuum gripper, wherein the vacuum gripper comprises a secondary, auxiliary vacuum system, and wherein the auxiliary vacuum system is designed for at least one of self-sufficient generation and/or provision of an auxiliary vacuum in the vacuum gripper independently of an external power supply, whereby the vacuum handling apparatus is adapted to:
i. apply the vacuum gripper to a workpiece and build up a vacuum in the vacuum gripper by means of the primary vacuum system;
ii. hold the workpiece during its handling by means of the vacuum prevailing in the vacuum gripper, and monitor at least one state variable during the handling; and
iii. generate an auxiliary vacuum in the vacuum gripper by means of a self-sufficient, secondary auxiliary vacuum system if the monitored state variable deviates from a target state; and

b. and an operator who works together with the vacuum handling apparatus.

Assignees

• Schmalz J Gmbh

Inventors

• Dunkmann Walter
• Schaaf Walter
• Straub David

Classifications

• B25J15/0616 Primary

  with vacuum · CPC title

• B25J19/02

  Sensing devices · CPC title

• B25J19/066

  Redundant equipment · CPC title