JPH0720232U - Variable speed type tool changer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a weight variable speed type tool changing device capable of easily implementing an ATC arm motor driven and controlled by an inverter device by inputting speed setting over multiple stages of a tool weight level. To do. [Structure] A sequence controller 21 for storing and issuing an operation completion signal of the ATC arm 5, a tool replacement command, a speed setting command matching the tool weight level, and various other commands, and a speed setting matching the tool weight level from the sequence controller. When a command is received, a speed setting circuit 22 that determines and controls a speed setting value and a general-purpose motor 24 for driving an ATC arm is predetermined when a motor start command from the sequence controller 21 and a speed setting command from the speed setting circuit 22 are received. The variable weight type tool changing device is composed of the inverter device 23 which is started at the rotation speed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool changing device in which the tool changing speed is variable according to the tool weight, the weight level of each tool is registered in advance in comparison with the tool number, and the tool changing corresponding to this weight level. The speed is variable.

[0002]

[Prior art and problems]

 Conventionally, many tool changing devices of the type in which the tool changing speed is variable according to the weight of the tool are provided as shown in Japanese Patent Publication No. Hei 2-139149, Japanese Unexamined Patent Publication Nos. Hei 3-60940 and Hei 3-60941. Technology that gives a tool a unique weight identification code and a tool weight measurement function and automatically changes the tool replacement speed based on the unique weight identification code and the tool weight measurement result. Parameter-based tool change speed control method and technology for correcting and controlling the speed command value to the actual speed.

The problem with the above-mentioned prior art is that, in Japanese Patent Laid-Open No. 2-139149, a tool is provided with a unique weight identification code and a tool weight measuring function. Although it is a technology for automatically changing the tool changing speed by means of the above, since the technical disclosure of the details thereof has not been made, the specific means of implementation is unclear. Further, Japanese Patent Application Laid-Open No. 3-60940 is a parameter system for measuring a torque for carrying a tool and selecting a tool carrying speed corresponding thereto, which makes the control processing means complicated. In JP-A-3-60941, since the speed command value of the servo motor is corrected and controlled while the actual speed is rising, the servo motor cannot be driven with the optimum speed command value.

[0004]

[Problems to be solved by the device]

 In view of the above-mentioned conventional problems, the present invention provides a variable weight speed type tool changer capable of easily implementing an ATC arm motor driven and controlled by an inverter device by inputting speed settings over multiple stages of the tool weight level. With the goal.

[0005]

[Means for Solving the Problems]

 The present invention is a sequence controller for storing and issuing an ATC arm tool change command, a speed setting command suitable for a tool weight level, and various other commands, and a speed setting command suitable for a tool weight level from the sequence controller. A speed setting circuit that determines and controls the speed setting value, and an inverter that starts a general-purpose motor for driving the ATC arm at a predetermined rotation speed when receiving a motor start command from the sequence controller or a speed setting command from the speed setting circuit. It is a variable speed tool changer consisting of a device.

[0006]

【Example】

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the variable weight tool changing device of the present invention will be described with reference to the embodiments shown in the drawings. FIG. 1 is a front view showing a variable speed type tool changing device of the present invention, FIG. 2 is a block diagram of an electric control device of a variable speed type ATC of the present invention, and FIG. 3 is a tool number. It is explanatory drawing which shows the relationship between registration and a tool weight level, FIG. 4 is a block diagram which shows a speed setting circuit, and FIG. 5 is a flowchart figure of a sequence controller.

In FIG. 1, the tool T1 mounted on the lower end spindle 4 of the head 1 and the tool T2 which is the next replacement tool from the tools T2 to Tn of the tool magazine 3 are indexed to the replacement position (a), Both tools T1 and T2 are simultaneously gripped by the ATC arm 5 that performs the exchanging movement by the cam mechanism 2 of the exchanging device 10, and the tool exchanging is performed by the tool exchanging motion of turning and advancing and retracting. According to the present invention, the tool change speed is selected and instructed in multiple stages based on the weight level of both tools T1 and T2 of the ATC arm 5.

FIG. 3 shows that the tool weight level corresponding to the tool number of each tool T2 to Tn stored in each pot of the tool magazine 3 is also registered at the same time. The lower part of the figure shows the tool being mounted on the spindle 4 and its tool weight level. The tool weight level is set to, for example, 1: 3 kg or less, 2: 3 kg to 5 kg, or 3: 5 kg or more. The number of steps of this tool weight level is increased or decreased as necessary.

FIG. 2 shows an electric control device 20 of the present invention. Sequence controller 21 for storing and issuing operation completion signal of ATC arm 5, tool change command, speed setting command suitable for tool weight level, and other various commands, and speed setting command suitable for tool weight level from the sequence controller The speed setting circuit 22 that determines and controls the speed setting value and the motor start command (forward rotation, reverse rotation) from the sequence controller 21 or the speed setting command from the speed setting circuit 22 receives a general purpose ATC arm drive. The inverter device 23 starts the motor 24 at a predetermined rotation speed. Details of the speed setting circuit 22 will be described with reference to FIG. Between the sequence controller 21 and the inverter device 23, a control relay CR, which is the central part of the speed setting circuit 22, and a weight level setting device V are provided. The control relay CR receives the speed setting command from the sequence controller 21, and when the tool weight level is "1:", the high-speed operation relay CR1 operates to close the contact Cr1 and the tool weight level is "2:". At this time, the medium speed operation relay CR2 operates to close the contact Cr2, and when the tool weight level is "3:", the low speed operation relay CR3 operates to close the contact Cr3. When the contact Cr1 is closed, the command voltage E1 of the weight level setting device V is sent to the inverter device 23 to start the general-purpose motor 24 for driving the ATC arm at high speed. When the contact Cr2 is closed, the command voltage E2 of the weight level setting device V is sent to the inverter device 23 to start the general-purpose motor 24 for driving the ATC arm at a medium speed. Further, when the contact Cr3 is closed, the command voltage E3 of the weight level setting device V is sent to the inverter device 23 to start the general-purpose motor 24 for driving the ATC arm at a low speed.

Next, the operation of the variable weight type tool changer will be described with reference to the flowchart of FIG. When a "tool change command by program" (a) is issued, it is judged "whether there is a tool" (b) on the spindle 4, and if there is no tool, then "whether there is a tool" at the tool change position (a) ( e) is judged. If there is no empty arm at all positions, the control relay CR receives the "high speed setting command" (h) of the tool weight level "1:" from the sequence controller 21, and the high speed operation relay CR1 operates. The lever contact Cr1 is closed and the inverter device 23 starts the general-purpose motor 24 at high speed. Also, if there is a tool by judging "whether or not there is a tool" (b) on the spindle 4, "check the weight level of the spindle tool" (c), and set the weight level "1 :, 2 :, 3: (D) is determined. Here, if the weight level is "1:" and there is no tool at the tool change position (a) by "presence or absence of tool" (e), "high speed setting command" of tool weight level "1:" The inverter device 23 starts the general-purpose motor 24 at high speed in (h 2). If there is a tool at the tool exchange position (a), this "check the weight level of the tool weight level" (f) and determine the weight level "1 :, 2 :, 3:" (g). When the tool weight level is "1:", the high-speed operation command CR (1) activates the high-speed operation relay CR1 to start the general-purpose motor 24 at high speed. When the weight level is "2:", the "medium-speed setting command" is given. "(K), the medium speed operation relay CR2 operates to start the general-purpose motor 24 at a medium speed, and when the weight level is" 3: ", the low-speed operation relay CR3 operates by the" low speed setting command "(o) to operate the general-purpose motor. Start 24 at a slow speed.

Next, when the weight level “1 :, 2 :, 3:” (d) is determined, the weight level is “2:”, and the “tool presence / absence” (j ) And there is no tool, the inverter device 23 starts the general-purpose motor 24 at high speed by the "medium speed setting command" (k) of the tool weight level "2:". If there is a tool at the tool change position (a), check "the weight level of the tool weight level" (m), and if the weight level is not "3:" (n), the tool weight level "2:" In response to the "medium speed setting command" (k), the inverter device 23 starts the general-purpose motor 24 at a medium speed. If the weight level is "3:" (n), the inverter device 23 starts the general-purpose motor 24 at a low speed by the "low speed setting command" (o) of the tool weight level "3:".

Finally, in the determination of the weight level “1 :, 2 :, 3:” (d), if the weight level is “3:”, the tool change position (b) indicates “whether or not there is a tool”. ”, The inverter device 23 starts the general-purpose motor 24 at a low speed by the“ low speed setting command ”(o) of the tool weight level“ 3: ”.

It is needless to say that the present invention is not limited to the above-mentioned one embodiment, and design changes can be made within the scope of the invention. For example, the tool weight level is set to, for example, 1: 3 kg or less, 2: 3 kg to 5 kg, and 3: 5 kg or more, but the number of steps of this tool weight level is increased or decreased as necessary. Furthermore,

[0014]

【effect】

 According to the present invention, the ATC arm tool change command, the speed setting command corresponding to the tool weight level, and the sequence controller for storing and issuing various other commands, and the speed setting command corresponding to the tool weight level from the sequence controller are received. And a speed setting circuit that determines and controls the speed setting value, and an inverter that starts a general-purpose motor for driving the ATC arm at a predetermined rotation speed when receiving a motor starting command from the sequence controller or a speed setting command from the speed setting circuit. A variable-speed tool changer consisting of a device and a variable-speed tool changer that can be easily implemented by an ATC arm motor driven and controlled by an inverter device by inputting speed settings over multiple stages of the tool weight level. Provide a device.

[Brief description of drawings]

FIG. 1 is a front view showing a variable speed tool changing device of the present invention.

FIG. 2 is a block diagram of an electric controller of a variable speed ATC according to the present invention.

FIG. 3 is an explanatory diagram showing the relationship between tool number registration and tool weight level.

FIG. 4 is a block diagram showing a speed setting circuit.

FIG. 5 is a flowchart of a sequence controller.

[Explanation of symbols]

 3 Tool Magazine 4 Spindle 5 ATC Arm T2-Tn Tool 10 Tool Changer 20 Electric Controller 21 Sequence Controller 22 Speed Setting Circuit 23 Inverter Device 24 General Motor CR Control Relay V Weight Level Setting Device CR1 High Speed Operation Relay CR2 Medium Speed Operation Relay CR3 Low speed operation relay

Claims (1)

[Scope of utility model registration request] 1. A sequence controller for storing and issuing an ATC arm tool change command, a speed setting command suitable for a tool weight level, and other various commands, and a speed setting command suitable for a tool weight level from the sequence controller. A speed setting circuit that determines and controls the speed setting value,
A variable speed tool changer comprising an inverter device for starting a general-purpose motor for driving an ATC arm at a predetermined rotation speed when receiving a motor start command from the sequence controller and a speed set command from a speed setting circuit.