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US 6,289,256 B1Granted
Method and apparatus for mounting parts
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakeshi Takeda, Yoshihiro Mimura, Noriaki Yoshida, Akira Kabeshita
Life of this patent
Estimating the term…
Abstract
A control device controls to move a chucking mechanism part to a first stop height 451 at a first speed, then at a second speed lower than the first speed before the chucking mechanism part comes in touch with a part from the first stop height, and stop when the chucking mechanism part touches the part, thereby to hold the part. So, a shock to the part when the part is held is reduced in the constitution, and the apparatus becomes light-weight because of the elimination of a shock-absorbing mechanism, hence realizing high-speed mounting.
Claims14
A method of mounting a part onto a body, comprising:
- moving a part holding member in a vertical direction at a first speed from an initial position to a part vicinal position located above an upper surface of a part positioned on a part supporting surface, a distance between the part vicinal position and the upper surface of the part being equal to a sum of a vertical set positional error of the part supporting surface and a height dimension error of the height of the part;
- moving the part holding member in a vertical direction at a second speed from the part vicinal position to a contact position whereat the part holding member contacts the part on the part supporting surface, the second speed being slower than the first speed;
- stopping a movement of the part holding member when the part holding member contacts the part on the part supporting surface;
- and
- holding the part using the part holding member after said stopping of the movement of the part holding member;
- wherein said moving of the part holding member is performed by a driving part driven by electric current, wherein when an amount of the electric current for driving the driving part reaches a threshold value, a determination is made that the part holding member has contacted the part so that the movement of the part holding member is stopped, the amount of electric current being measured after a current stabilization duration is complete, the current stabilization duration being an amount of time for the electric current fed to the driving part to stabilize.
3 more elements
An apparatus for mounting a part onto a body, comprising:
- a part holding member adapted to be moved in a vertical direction to pick up a part positioned on a part supporting surface and to hold the part;
- a control device adapted to:
- control said part holding member so as to move said part holding member in a vertical direction at a first speed from an initial position to a part vicinal position located above an upper surface of the part on the part supporting surface, a distance between the part vicinal position and the upper surface of the part being equal to a sum of a vertical set positional error of the part supporting surface and a height dimension error of the height of the part;
- control said part holding member so as to move said part holding member in a vertical direction at a second speed from the part vicinal position to a contact position whereat said part holding member contacts the part on the part supporting surface, the second speed being slower than the first speed;
- control said part holding member so as to stop a movement of said part holding member when said part holding member contacts the part on the part supporting surface;
- and
- control said part holding member so that said part holding member holds the part after the movement of said part holding member is stopped by said control device;
- and
- a driving part driven by electric current for moving said part holding member, said control device being adapted to determine that said part holding member has contacted the part so as to stop the movement of the part holding member by detecting when an amount of the electric current for driving said driving part reaches a threshold value, said control device being adapted to measure the amount of electric current after a current stabilization duration is complete, the current stabilization duration being an amount of time for the electric current fed to said driving part to stabilize.
6 more elements
Dependencies are inferred from the claim text.