TW201636752A - Combination control device for numerical control machine tool and ultrasonic tool holder - Google Patents

Abstract

A combination control device for a numerical control machine tool and an ultrasonic tool holder is provided. The numerical control machine tool is connected to a numerical controller for controlling operation of a spindle of the machine tool. The ultrasonic tool holder is assembled on the spindle and connected to an ultrasonic controller. The ultrasonic controller is provided with a processing unit, a signal current source, a detecting unit and an output unit in order to supply a current source with frequency and amplitude signals to the ultrasonic tool holder, allowing the ultrasonic tool holder to perform an ultrasonic processing operation on a workpiece. The numerical controller of the numerical control machine tool is connected to the ultrasonic controller via a set of digital input contacts (DI) and a set of analog input contacts (AI), for issuing an ON-OFF command to the ultrasonic controller via the digital input contacts (DI) and performing analog control for output power on the ultrasonic controller via the analog input contacts (AI), so as to regulate an output amplitude of the ultrasonic controller to the ultrasonic tool holder, thereby achieving an effect of optimizing control of a processing operation through the interconnection between the numerical controller and the ultrasonic controller.

Description

Numerical control processing machine tool combined with ultrasonic knife handle

In particular, the present invention provides a numerical control machine tool and an ultrasonic knife handle combined control device which realizes the optimization control of the machining operation by using the numerical controller and the ultrasonic controller.

Referring to FIG. 1 , the ultrasonic knife includes mainly a cutter body 10 , an expansion rod 11 locked to the handle body 10 , and a machining tool 12 locked to the end of the expansion rod 11 , which is outputted by the ultrasonic controller 20 . The current source of the frequency and amplitude signals is applied to the expansion rod 11, so that the piezoelectric material on the expansion rod 11 generates high-frequency vibration, and the machining tool 12 at the end of the expansion rod 11 is subjected to a high-frequency vibration cutting operation exceeding the sound frequency. Due to the high-frequency vibration of the machining tool 12, the cutting surface is continuously separated from the chips at a high frequency, and the close contact state between the cutting surface of the machining tool 12 and the chips is changed, thereby effectively reducing the between the machining tool and the chip in the conventional cutting mode. The friction coefficient significantly improves the adverse effects caused by high temperature and high pressure between the cutting chip and the cutting surface of the processing tool 12, thereby providing anti-vibration, reducing cutting resistance, reducing processing strain, effectively improving chip removal and effectively improving the processing surface. The effect of cutting operations.

When the machining tool 12 of the ultrasonic blade performs the processing operation of the high-frequency vibration, the magnitude of the frequency and the amplitude are important parameters, and the magnitude of the frequency depends on the design of the expansion rod 11, because the ultrasonic wave of the high-frequency vibration The waveform of the various vibration frequencies of the knife must not only make the node position (the position where the amplitude is zero) be at the fixed position of the connection between the handle body 10 and the expansion rod 11, in order to prevent the knife body 10 from being affected by the high-frequency vibration of the expansion rod 11. Vibration situation and must make each The maximum amplitude point position of the vibration frequency is located at the tool tip position of the machining tool 12 to produce the maximum cutting benefit, so different types of ultrasonic knife handles have corresponding frequency corresponding to them in a certain frequency range; the magnitude of the amplitude depends on the magnitude of the amplitude. In the processing conditions of the workpiece, such as the material of the workpiece or the processing sequence, when the material of the workpiece is a hard and brittle material, a smaller amplitude should be selected to avoid the cracking of the workpiece due to excessive amplitude, or In the initial machining and the final machining, the smaller amplitude should be selected to avoid the impact damage of the machining tool and the cracking of the machining part due to the excessive amplitude. In the middle machining, the larger amplitude can be selected to increase the machining speed. Therefore, the frequency and amplitude are related to the processing quality and processing efficiency of ultrasonic high-frequency vibration.

Please refer to FIG. 1 again. The conventional ultrasonic knife handles have their frequency and amplitude independently controlled by the ultrasonic controller 20 independently, and are not connected to the numerical controller of the numerical control processing machine, that is, when After the numerical control machining machine completes the tool change operation of the ultrasonic tool holder, the machine tool operator must manually adjust the output frequency and amplitude of the ultrasonic controller 20 according to the type of the ultrasonic knife handle and the processing conditions of the workpiece. The manual adjustment method not only causes a heavy workload for the machine operator, but also causes the following drawbacks in terms of processing quality and processing efficiency:

1. The ultrasonic knife handle will change the position of the joint due to the different locking force of the cutter body 10 and the expansion rod 11, and the machining tool 12 will also change the position of the tool tip due to the loss, so when these factors are changed, the ultrasonic knife is applied. The corresponding frequency will also change. However, the machine operator cannot observe the slight change of these factors. Therefore, the ultrasonic controller 20 cannot be outputted at the correct corresponding frequency at any time by manual adjustment, which affects the processing quality of the workpiece.

2. There are many variations in the machining conditions of the workpiece. In terms of machining timing, the machine operator cannot adjust the output amplitude of the ultrasonic controller 20 at any time with the machining timing, so that the machining output has a single output amplitude. To perform the addition In the work industry, such an operation mode may cause impact damage of the machining tool and cracking of the workpiece, which affects the processing quality and processing efficiency of the workpiece.

In view of this, the inventor has been engaged in research and development and production experience of related industries for many years, and has conducted in-depth research on the problems currently faced. After long-term efforts and research, he has finally developed a numerical controller for numerically controlled machine tools. Interconnected with the ultrasonic controller, and then utilizes the powerful computing power of the numerical controller, so that the ultrasonic controller can control the corresponding frequency and amplitude correctly with the program of the numerical controller, and achieve the combined control device for the optimization control of the machining operation. This is the design tenet of the present invention.

A first object of the present invention is to provide a numerical control processing machine tool and an ultrasonic knife handle combined control device, the numerical control processing machine tool is coupled with a numerical controller to control the spindle operation of the machining machine tool, and the ultrasonic knife tool set is set in An ultrasonic controller is disposed on the main shaft, and the ultrasonic controller is provided with a processing unit, a signal current source, a detecting unit and an output unit for outputting a current source with a frequency and an amplitude signal to the ultrasonic knife handle. The ultrasonic knife performs an ultrasonic machining operation on the workpiece, wherein the numerical controller of the numerical control processing machine is connected to the ultrasonic controller by a set of digital input contacts (DI) through which the digital input contacts can be (DI) The ON-OFF command of the ultrasonic controller causes the ultrasonic controller to restart and perform the frequency sweeping operation, and then interconnects the numerical controller with the ultrasonic controller to make the ultrasonic controller follow The program control of the numerical controller controls the corresponding frequency correctly to improve the processing quality and achieve the benefit of optimal control of the machining operation.

A second object of the present invention is to provide a combined control device for a numerically controlled processing machine tool and an ultrasonic tool holder, wherein the numerical control machining machine tool is coupled to a numerical controller for controlling the spindle operation of the machining machine tool, and the ultrasonic knife tool set is set in An ultrasonic controller is connected to the main shaft, and the ultrasonic controller is provided with a processing unit and a signal electric a current source, a detecting unit and an output unit for outputting a current source with a frequency and an amplitude signal to the ultrasonic knife, so that the ultrasonic knife performs ultrasonic processing on the workpiece, wherein the numerical value controls the numerical controller of the processing machine It is connected to the ultrasonic controller by a set of analog input contacts (AI), and the analog control of the output power level of the ultrasonic controller can be controlled via the digital input contact (DI) to regulate the supersonic controller The output amplitude of the sonic knife handle is further interconnected with the ultrasonic controller through the numerical controller, so that the ultrasonic controller can control the amplitude of the output with the program of the numerical controller at any time to improve the processing quality and processing efficiency. The benefits of job optimization control.

Conventional part:

10‧‧‧Knife body

11‧‧‧Expanding rod

12‧‧‧Processing tools

20‧‧‧Supersonic controller

Part of the invention:

30‧‧‧ Numerical controller

31‧‧‧Digital input contacts

32‧‧‧ analog input contacts

40‧‧‧ Spindle

50‧‧‧Ultrasonic Knife

50`‧‧‧Ultrasonic Knife

60‧‧‧Supersonic controller

61‧‧‧Processing unit

62‧‧‧Signal current source

63‧‧‧Detection unit

64‧‧‧Output unit

Figure 1: Schematic diagram of the conventional ultrasonic knife handle.

Figure 2: Schematic diagram of the body structure of the present invention.

Figure 3: Schematic diagram of the control architecture of the present invention.

Figure 4 is a schematic illustration of the program steps of the numerical controller of the present invention.

In order to make the present invention further understand the present invention, a preferred embodiment and a drawing will be described in detail as follows: Referring to FIG. 2, the numerical control processing machine tool of the present invention is coupled to a numerical controller 30. And the numerical controller 30 controls the spindle 40 of the processing machine to be operated. The ultrasonic blade 50 is assembled on the spindle 40, and the spindle 40 rotates to perform a cutting operation, and the ultrasonic blade 50 is connected. An ultrasonic controller 60 outputs a current source having a frequency and amplitude signal to the ultrasonic blade 50 by the ultrasonic controller 60 to cause the ultrasonic blade 50 to perform a high frequency vibration cutting operation beyond the ultrasonic frequency. Since the structure of the ultrasonic blade 50 itself is a conventional technique and is not the focus of the present invention, it will not be described again. Referring to FIG. 3, the ultrasonic controller 60 of the present invention is provided with a processing unit 61, The signal current source 62, the detecting unit 63 and the output unit 64 are used to calculate and issue a command signal. The signal current source 62 is coupled to the processing unit 61 and receives the command signal of the processing unit 61. The detecting unit 63 is coupled to the signal current source 62, so that the signal current source 62 can detect the load end impedance value of the ultrasonic knife handle 50 via the detecting unit 63 for the processing unit 61 to calculate the super The frequency of the sonic knife 50 is matched to the signal current source 62, so that the signal current source 62 can output a current source with frequency and amplitude signals to the ultrasonic knife 50 via the output unit 64; When receiving the start command, the processing unit 61 of the sound wave controller 60 sends a command signal for sweeping the signal current source 62. The signal current source 62 performs the sweep of the ultrasonic tool handle 50 via the detecting unit 63. In the frequency operation, the processing unit 61 obtains the load end impedance value of the ultrasonic knife handle 50 by using the principle of circuit impedance matching, and calculates the frequency matching the ultrasonic knife handle 50, and finally the processing unit 61 The signal current source 62 sends a matching frequency and amplitude command signal, so that the signal current source 62 outputs a current source with a matching frequency and amplitude signal to the ultrasonic knife 50 through the output unit 64, so that the ultrasonic knife 50 is used as a transcendental sound wave. Frequency high frequency vibration cutting operations. In addition, as described in the prior art, the conventional ultrasonic knife independently controls the output of the frequency and amplitude by the ultrasonic controller, and is not connected to the numerical controller of the numerically controlled processing machine, so the ultrasonic controller It is not only impossible to adjust the output of the correct corresponding frequency with the loss of the ultrasonic knife, and for the control of the amplitude, the conventional ultrasonic controller performs only the output amplitude of a single size in the processing timing of the workpiece. Processing operations affect the processing quality and processing efficiency of the workpiece. In order to improve the foregoing problems, the present invention connects the numerical controller 30 of the numerically controlled machine tool to the ultrasonic controller 60 with a set of digital input contacts (DI) 31 and a set of analog input contacts (AI) 32, The numerical controller 30 is interconnected with the ultrasonic controller 60, and the numerical controller 30 can pass the digital input contact (DI) 3 The pair of ultrasonic controllers 60 issues an ON-OFF start command to cause the ultrasonic controller 60 to perform a frequency sweep operation on the ultrasonic tool handle 50, and to the ultrasonic controller 60 via the analog input contact (AI) 32. The analog control of the output power level is performed to adjust the output amplitude of the ultrasonic controller 60 to the ultrasonic knife 50, and the numerical controller 30 program design and powerful computing power are used to make the ultrasonic controller 60 control with the numerical value at any time. The program control of the device 30 correctly outputs the corresponding frequency and amplitude to achieve the benefit of optimal control of the machining operation.

Referring to Figures 3 and 4, the display screen of the numerically controlled processing machine tool of the present invention, when the program step of the numerical controller 30 is displayed as M6T1, indicates that the tool change operation of the ultrasonic tool holder 50 numbered T1 is performed; When it is displayed as M78, it indicates that the numerical controller 30 issues an ON-OFF start command to the ultrasonic controller 60 through the digital input contact (DI) 31, even if the ultrasonic controller 60 is turned off and then restarted, when the ultrasonic wave is used. When the processing unit 61 of the controller 60 receives the start command from the numerical controller 30, the processing unit 61 sends a command signal for sweeping the signal current source 62, and the signal current source 62 passes through the detecting unit. 63 performs a frequency sweep operation on the ultrasonic knife handle 50 of the T1, and the processing unit 61 obtains the load end impedance value of the ultrasonic knife handle 50 of T1 by using the principle of circuit impedance matching, and causes the processing unit 61 to calculate the T1 with the T1. The frequency of the ultrasonic knife 50 is matched; then, when the program step is displayed as M125, it represents an analogy of the output power of the numerical controller 30 to the ultrasonic controller 60 through the analog input contact (AI) 32. System, wherein "5" indicates that the output power is 50% of the maximum output power. When the processing unit 61 of the ultrasonic controller 60 receives the output power signal from the numerical controller 30, the processing unit 61 commands the signal current source. The amplitude of the regulated output current is 50% of the maximum output amplitude, and the signal current source 62 outputs the current source with the matching frequency and the amplitude signal to the ultrasonic knife handle 50 of T1 via the output unit 64; then when the program step is displayed as G4X5 , is the T1 ultrasonic knife handle 50 The high-frequency vibration cutting operation is started. When the T1 ultrasonic cutter 50 completes the stage high-frequency vibration cutting operation and the program step is displayed as G6T3, it indicates that the ultrasonic tool No. 50 of the T3 is changed. Then, when the program step is displayed as M78, the numerical controller 30 issues an ON-OFF start command to the ultrasonic controller 60 through the digital input contact (DI) 31, when the processing unit 61 of the ultrasonic controller 60 receives When the start command is sent from the numerical controller 30, the processing unit 61 sends a command signal for sweeping the signal current source 62, and the signal current source 62 passes the ultrasonic unit 50 of the T3 via the detecting unit 63. `Executing the sweeping operation, the processing unit 61 can obtain the load end impedance value of the T3 ultrasonic knife handle 50', and calculate the frequency matching the T3 ultrasonic knife handle 50'; then the program step is displayed as M129 At the time, the numerical controller 30 performs analogy control of the output power level of the ultrasonic controller 60 through the analog input contact (AI) 32, wherein "9" indicates that the output power is 90% of the maximum output power, when the super sound is After the processing unit 61 of the controller 60 receives the output power signal from the numerical controller 30, the processing unit 61 commands the signal current source 62 to regulate the amplitude of the output current to be 90% of the maximum output amplitude, and causes the signal current source 62 to pass the signal current source 62. The output unit 64 outputs the current source with the matching frequency and amplitude signal to the ultrasonic knife handle 50 of T3; then when the program step is G4X5, it indicates that the ultrasonic knife 50' of the T3 starts to perform the high frequency vibration cutting operation.

According to the above description, the present invention connects the numerical controller 30 of the numerically controlled processing machine tool to the ultrasonic controller 60 by a set of digital input contacts (DI) 31 and a set of analog input contacts (AI) 32. After the numerical controller 30 is interconnected with the ultrasonic controller 60, the numerical controller 30 can not only issue an ON-OFF start command to the ultrasonic controller 60 via the digital input contact (DI) 31, so that the ultrasonic controller 60 signal current source 62 outputs the matching frequency of T1 ultrasonic knife handle 50 (or T3 ultrasonic knife handle 50'), and can be passed through numerical controller 3 at any time. The programming of 0 is analogous to the output power level of the signal current source 62 of the ultrasonic controller 60 by the analog input contact (AI) 32 to regulate the signal current source 62 of the ultrasonic controller 60 to the T1 super The output amplitude of the sonic knife 50 (or T3 ultrasonic knife 50') can be used in the processing sequence of the workpiece according to the processing conditions (such as the material of the workpiece or the processing timing of different stages), by the value The programming of the controller 30 is performed in different materials or output amplitudes of different sizes at different stages, and the numerical controller 30 program design and powerful computing power are utilized to greatly improve the processing quality and processing efficiency. The benefits of optimized control of machining operations. In addition, when the ultrasonic machining is performed for a period of time, the corresponding matching frequency is changed due to factors such as thermal deformation or tool loss. At this time, the program of the numerical controller 30 can be used to execute the program step of the M78 in a timely manner. The numerical controller 30 is caused to issue an ON-OFF start command to the ultrasonic controller 60, so that the processing unit 61 of the ultrasonic controller 60 issues a swept command signal to the signal current source 62 again, and the processing unit 61 can command The signal current source 62 re-outputs the matching frequency of the ultrasonic knife handle to achieve the benefit of optimal control of the machining operation.

Accordingly, the present invention is a practical and progressive design, but it has not been disclosed that the same products and publications are disclosed, thereby permitting the invention patent application requirements, and applying in accordance with the law.

30‧‧‧ Numerical controller

31‧‧‧Digital input contacts

32‧‧‧ analog input contacts

40‧‧‧ Spindle

50‧‧‧Ultrasonic Knife

50`‧‧‧Ultrasonic Knife

60‧‧‧Supersonic controller

61‧‧‧Processing unit

62‧‧‧Signal current source

63‧‧‧Detection unit

64‧‧‧Output unit

Claims (4)

The utility model relates to a numerical control processing machine tool and a supersonic knife handle combined control device, which comprises: a numerical control processing machine tool: a spindle is provided; an ultrasonic knife handle is set on a spindle of the numerical control processing machine; an ultrasonic controller The ultrasonic controller is provided with a processing unit, a signal current source, a detecting unit and an output unit. The signal current source is coupled to the processing unit and receives a command signal of the processing unit. The detecting unit is coupled to the signal current source to perform a frequency sweeping operation, and the output unit is coupled to the signal current source to output a current source with frequency and amplitude signals to the ultrasonic knife handle; Connecting the numerical control machining machine to control the spindle actuation of the machining machine, the numerical controller is connected to the ultrasonic controller by a set of digital input contacts and a set of analog input contacts, so that the numerical controller and the numerical controller The ultrasonic controller is interconnected, and a start command is issued to the processing unit of the ultrasonic controller via the digital input contact, so that the ultrasonic control is performed The signal current source of the device performs a frequency sweep operation through the detecting unit, and performs analog control of the output power level of the ultrasonic controller via the analog input contact to regulate the signal current source of the ultrasonic controller to the super The output amplitude of the sonic knife handle. Controlling the combined control device of the processing machine tool and the ultrasonic knife handle according to the numerical value described in the first item of the patent application scope, wherein the numerical controller issues a start command to the processing unit of the ultrasonic controller via the digital input contact, The processing unit of the ultrasonic controller commands the signal current source to perform a frequency sweep operation on the ultrasonic tool handle via the detecting unit. Control the processing machine tool and ultrasonic knife handle according to the value described in item 2 of the patent application scope In combination with the control device, when the signal current source performs a frequency sweep operation on the ultrasonic tool handle via the detecting unit, the processing unit obtains the load end impedance value of the ultrasonic tool holder by using the principle of circuit impedance matching, and operates A frequency matching the ultrasonic blade handle causes the signal current source to output a current source having a matching frequency and amplitude signal to the ultrasonic blade via the output unit. Controlling the combined control device of the processing machine tool and the ultrasonic knife handle according to the numerical value described in the first item of the patent application scope, wherein the numerical controller sends an output power signal to the processing unit of the ultrasonic controller via the analog input contact point; The processing unit of the ultrasonic controller commands the signal current source to regulate the amplitude of the output current, so that the signal current source outputs a current source with frequency and amplitude signals to the ultrasonic tool handle via the output unit.