US 11,707,859 B2Granted

Machining apparatus and tool life estimation method

AssigneeMitsubishi Electric Corporation

InventorsTakuya Sakaishi, Taishi Ando

Life of this patent

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Abstract

A machining apparatus includes encoders that detect first rotational positions of motors that respectively drive an unwind shaft and a take-up shaft for conveying a material, an encoder that detects a second rotational position of a motor that drives a cutter edge for cutting the material, and a controller that controls the motor based on the first rotational position and controls the motor based on the second rotational position to coordinately control conveyance of the material and movement of the cutter edge. The controller calculates positional relationship information representing a positional relationship between the material and the cutter edge based on the second rotational position, determines whether the cutter edge is in contact with the material based on the positional relationship information, and estimates a life of the cutter edge based on a load on the motor when the tool is in a contact state.

Claims14

Dependent claims

A machining apparatus comprising:

a first servomotor to drive a conveyor that conveys a material to be machined;
a second servomotor to drive a tool for cutting the material;
a first encoder to detect a first rotational position of a shaft of the first servomotor;
a second encoder to detect a second rotational position of a shaft of the second servomotor;
a processor;
and
a memory to store a program which performs, when executed by the processor, processes of:
controlling the first servomotor based on the first rotational position and controlling the second servomotor based on the second rotational position, to coordinately control a conveyance of the material and a movement of the tool,
wherein the processor calculates positional relationship data indicating a positional relationship between a machining position on the material and a position of the tool based on the second rotational position, determines whether the tool is in a contact state based on the positional relationship data, and estimates a life of the tool based on a load on the second servomotor when the tool is in the contact state, the contact state being a state in which the tool is in contact with the material.

6 more elements

A tool life estimation method comprising:

driving a conveyor that conveys a material to be machined;
driving a tool for cutting the material;
detecting a first rotational position of a shaft of a first servomotor;
detecting a second rotational position of a shaft of a second servomotor;
controlling the first servomotor based on the first rotational position and controlling the second servomotor based on the second rotational position, to coordinately control a conveyance of the material and a movement of the tool;
and
calculating positional relationship data indicating a positional relationship between a machining position on the material and a position of the tool based on the second rotational position, determining whether the tool is in a contact state based on the positional relationship data, and estimating a life of the tool based on a load on the second servomotor when the tool is in the contact state, the contact state being a state in which the tool is in contact with the material.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/801,812Filed 27 Apr 2020
Published: US 2023/0087376 A123 Mar 2023
Granted: 25 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B26D 1/62
Involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter: and is rotating about an…
B23D 25/02
Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut: flying shearing machines
B23Q 17/09
Arrangements for observing, indicating or measuring on machine tools: for indicating or measuring cutting pressure or for determining cutting-tool…
B23Q 17/0995
For indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool: tool life management