CN214867670U

CN214867670U - Permanent magnet frequency conversion cutting machine

Info

Publication number: CN214867670U
Application number: CN202120790164.4U
Authority: CN
Inventors: 唐宏峰; 张建强
Original assignee: Tian Jingyang
Current assignee: Tian Jingyang
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-26
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a permanent magnet variable frequency cutting machine, including organism and saw bit, be equipped with the motor that drives the saw bit work on the organism, the characteristics are that the electricity is connected with the variable frequency excitation drive module who is used for changing the power supply frequency of motor on the input of motor, and when the load changes, the variable frequency excitation drive module can be according to the actual load condition, adjustment output frequency and electric current to guarantee that the motor is invariable under the different load conditions rotational speed, the motor is PMSM; the advantage is when the load changes, and the power calculating unit carries out output current adjustment with the power change situation according to the reality to guarantee that the rotational speed of motor is invariable, can effectual improvement saw bit life, improve the cutting effect of saw bit.

Description

Permanent magnet frequency conversion cutting machine

Technical Field

The utility model relates to a cutting machine field especially relates to a permanent magnetism frequency conversion cutting machine.

Background

The cutting machine is a common device capable of cutting materials such as metal square flat tubes, square flat steel, I-shaped steel, channel steel, carbon steel, element tubes and the like.

The existing section cutting machine mostly uses a series motor and has the following defects: when the load changes, the cutting rotating speed and the torque force are not constant, the service life and the cutting effect of the saw blade are seriously influenced, the noise of the series excited motor is high, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a keep the rotational speed invariable is provided, can guarantee the life of fixed cutting rotational speed in order to improve the saw bit during the saw bit cutting, obtains better cutting effect's permanent magnetism frequency conversion cutting machine.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: permanent magnetism frequency conversion cutting machine, including organism and saw bit, be equipped with the motor of drive saw bit work on the organism, its characterized in that: the input end of the motor is electrically connected with a variable frequency excitation driving module used for changing the power supply frequency of the motor, when the load changes, the variable frequency excitation driving module can adjust the output frequency and the current according to the actual load condition so as to ensure that the rotating speed of the motor is constant under different load conditions, and the motor is a permanent magnet synchronous motor.

The utility model discloses a further preferred scheme does: the variable frequency excitation driving module is connected with an external signal, and the variable frequency excitation driving module changes the power supply frequency by receiving an instruction of the external signal, so that the rotating speed of the motor is changed.

The utility model discloses a further preferred scheme does: the alternating current-to-direct current unit is connected with the alternating current input unit and the frequency conversion unit, alternating current is input into the alternating current-to-direct current unit from the alternating current unit, and the alternating current-to-direct current unit is input into the frequency conversion circuit unit.

The utility model discloses a further preferred scheme does: the frequency conversion circuit unit is connected with the processor unit and the motor and inputs the current modulated by the processor unit into the motor.

The utility model discloses a further preferred scheme does: the detection and calculation combination unit comprises a position detection unit and a power calculation unit, the frequency conversion circuit unit is used for inputting the position detection unit, and the power calculation unit outputs the position detection unit to the processor unit.

The utility model discloses a further preferred scheme does: and the variable-frequency excitation driving module is electrically connected with a rotating speed regulator for controlling the rotating speed of the motor.

The utility model discloses a further preferred scheme does: the rotating speed regulator comprises a display screen, a switch and a central processing unit, the central processing unit is respectively connected with the switch and the display screen, the switch is used for giving a rotating speed regulating signal to the control central processing unit, and the display screen is used for displaying running parameter information.

The utility model discloses a further preferred scheme does: the variable-frequency excitation driving module is electrically connected with a parameter display for observing the rotating speed of the motor

The utility model discloses a further preferred scheme does: the machine body comprises a base and a rocker arm, the bottom end of the rocker arm is rotatably connected to the base, and the saw blade is arranged on the rocker arm.

Compared with the prior art, the utility model has the advantages that the electricity is connected with the frequency conversion and excites drive module on the input of motor, and the electricity is connected with speed regulator on the frequency conversion excitation drive module, the motor is PMSM, and when the load changes, the power calculating unit carries out the output current adjustment with according to the power change condition of reality to the rotational speed of guaranteeing the motor is invariable, can the effectual life who improves the saw bit, improves the cutting effect of saw bit.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a first structural diagram of the whole profile cutting machine;

FIG. 2 is a second schematic structural view of the whole profile cutting machine;

fig. 3 is a circuit diagram of a first embodiment of the present invention;

fig. 4 is a circuit diagram of a second embodiment of the present invention.

In the figure: 1. a base; 2. a rocker arm; 3. a saw blade; 4. a motor; 11. an accommodating chamber; 12. opening a hole; 13. a mounting seat; 14. a screw rod; 51. a front splint; 52. a rear splint; 53. a locking mechanism; 61. a cable wire; 62. a power line.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Permanent magnetism frequency conversion cutting machine, including base 1 and rocking arm 2, the bottom of rocking arm 2 rotates to be connected on base 1, is equipped with saw bit 3 on the rocking

arm

2, and 3 outer cladding of saw bit have safety cover 31, are equipped with motor 4 on the rocking arm 2, and motor 4 drive saw bit 3 work.

The motor is a permanent magnet synchronous motor, and the permanent magnet synchronous motor provides excitation by a permanent magnet, so that the motor has a simpler structure, the processing and assembly cost is reduced, a collecting ring and an electric brush which are easy to cause problems are omitted, and the running reliability of the motor is improved; and because excitation current is not needed, excitation loss is avoided, and the efficiency and the power density of the motor are improved.

The permanent magnet synchronous motor is composed of a stator, a rotor, an end cover and the like. The stator is basically the same as a common induction motor, and a lamination structure is adopted to reduce iron loss during the operation of the motor. The rotor can be made into solid or laminated by lamination. The armature winding can adopt a concentrated whole-pitch winding, and can also adopt a distributed short-pitch winding and an unconventional winding.

Be equipped with fixture on base 1, fixture is used for fixing the material centre gripping on base 1, makes the stable cutting material of saw bit 3 ability.

Fixture includes front plate 51 and back splint 52, front plate 51 rotates to be connected on base 1, be equipped with locking mechanism 53 on front plate 51, locking mechanism 53 is used for front plate 51 to lock front plate 51 after rotating to required angle, be equipped with mount pad 13 on the base 1, be equipped with its threaded connection's lead screw 14 on the mount pad 13, back splint 52 rotates the front end of connecting at lead screw 14, the rear end of lead screw 14 is connected with handle 15, make lead screw 14 rotate through turning handle 15, lead screw 14 rotates and takes place the displacement, promote back splint 52 displacement, press from both sides the material tightly between front plate 51 and back splint 52.

The below of base 1 is equipped with and holds chamber 11, holds fixedly connected with drive box 6 in the chamber 11, is connected with two external lines on the drive box 6, is cable conductor 61 and power cord 62 respectively, and power cord 62 is gone into the circuit to the drive box 6 in, and cable conductor connection motor 4 driving motor 4 rotates.

Be equipped with on base 1 and be rectangular form trompil 12, when saw bit 3 pushed down work cutting material, saw bit 3 passed to holding in the chamber 11 from trompil 12, made the complete cutting material of saw bit 3 ability.

A variable-frequency excitation driving module is arranged in the driving box 6, 220V alternating current is input into the variable-frequency excitation driving module, the 220V alternating current is modulated into high-voltage alternating current through the variable-frequency excitation driving module to drive the motor 4, the frequency of the modulated high-voltage alternating current is variable, the rotating speed of the motor 4 is controlled through the change of the frequency, and the rotating speed of the motor is constant when the load changes through the change of the current.

The variable-frequency excitation driving module comprises an alternating-current input unit, an alternating-current variable-direct-current unit, a variable-frequency circuit unit, a processor unit and a detection calculation combination unit.

The alternating current is input from the alternating current input unit, after the alternating current is input into the alternating current-to-direct current unit, the direct current is output to the frequency conversion circuit unit, the frequency conversion circuit unit is connected with the processor unit and the motor, and the frequency conversion circuit unit inputs the current modulated by the processor unit into the motor 4.

The detection and calculation combination unit comprises a position detection unit and a power calculation unit, and the frequency conversion circuit unit detects the position of the input

The power calculation unit outputs the current power of the circuit to the processor unit, the position detection unit detects the current running phase of the motor, the power calculation unit calculates the current power of the circuit and transmits the current power to the processor, and the processor controls the frequency conversion circuit unit to change the current of the circuit or correct the output frequency according to the calculation result, so that the load rotating speed output by the motor to the saw blade is constant.

The first embodiment is as follows: the variable-frequency excitation driving module is also electrically connected with a rotating speed regulator, the rotating speed regulator comprises a display screen, a switch and a central processing unit, the central processing unit is respectively connected with the switch and the display screen, the switch is responsible for giving rotating speed regulating signals to the control central processing unit, and the display screen displays operation parameter information.

The rotating speed of the motor can be adjusted through external signals, the frequency conversion excitation driving module changes the power supply frequency through receiving the instructions of the external signals, and therefore the rotating speed of the motor is changed, and the external signals can be matched remote controller signals or mobile phone APP signals and the like.

Example two: the variable frequency excitation driving module is also electrically connected with a parameter display, namely the variable frequency excitation driving module does not need to be connected with a parameter display

The device has the function of speed regulation, but can observe the rotating speed of the motor and other operating parameters of the motor at the moment. The model of the frequency conversion circuit unit is VS-606V7, the model of the alternating current-direct current unit is HA63, the model of the processor unit is CS1H-CPU64, and the display screen is an LCD display screen.

When the load changes, the current is modulated by the variable-frequency excitation driving module, the power calculation unit adjusts the output current according to the actual power change condition, and meanwhile, the frequency of the current is corrected, so that the cutting rotating speed is constant, the service life of the saw blade can be effectively prolonged, and the cutting effect of the saw blade is improved.

The motor adopts a permanent magnet synchronous motor, the rotating speed of the motor is constant under different load conditions, and the permanent magnet synchronous motor has low noise and high efficiency.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

It is right above the utility model provides a permanent magnetism frequency conversion cutting machine has carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and embodiment have explained, and the explanation of above embodiment is only used for helping understanding the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. Permanent magnetism frequency conversion cutting machine, including organism and saw bit, be equipped with the motor of drive saw bit work on the organism, its characterized in that: the input end of the motor is electrically connected with a variable frequency excitation driving module used for changing the power supply frequency of the motor, when the load changes, the variable frequency excitation driving module can adjust the output frequency and the current according to the actual load condition so as to ensure that the rotating speed of the motor is constant under different load conditions, and the motor is a permanent magnet synchronous motor.

2. The permanent magnet variable frequency cutting machine according to claim 1, characterized in that: the variable frequency excitation driving module is connected with an external signal, and the variable frequency excitation driving module changes the power supply frequency by receiving an instruction of the external signal, so that the rotating speed of the motor is changed.

3. The permanent magnet variable frequency cutting machine according to claim 1, characterized in that: the variable-frequency excitation driving module comprises an alternating current input unit, an alternating current-to-direct current unit, a variable-frequency circuit unit, a processor unit and a detection and calculation combination unit.

4. The permanent magnet variable frequency cutting machine according to claim 3, characterized in that: the alternating current-to-direct current unit is connected with the alternating current input unit and the frequency conversion unit, alternating current is input into the alternating current-to-direct current unit from the alternating current unit, and the alternating current-to-direct current unit is input into the frequency conversion circuit unit.

5. The permanent magnet variable frequency cutting machine according to claim 3, characterized in that: the frequency conversion circuit unit is connected with the processor unit and the motor and inputs the current modulated by the processor unit into the motor.

6. The permanent magnet variable frequency cutting machine according to claim 3, characterized in that: the detection and calculation combination unit comprises a position detection unit and a power calculation unit, the frequency conversion circuit unit is used for inputting the position detection unit, and the power calculation unit outputs the position detection unit to the processor unit.

7. The permanent magnet variable frequency cutting machine according to claim 1, characterized in that: and the variable-frequency excitation driving module is electrically connected with a rotating speed regulator for controlling the rotating speed of the motor.

8. The permanent magnet variable frequency cutting machine according to claim 7, characterized in that: the rotating speed regulator comprises a display screen, a switch and a central processing unit, the central processing unit is respectively connected with the switch and the display screen, the switch is used for giving a rotating speed regulating signal to the control central processing unit, and the display screen is used for displaying running parameter information.

9. The permanent magnet variable frequency cutting machine according to claim 1, characterized in that: and the variable-frequency excitation driving module is electrically connected with a parameter display for observing the rotating speed of the motor.

10. The permanent magnet variable frequency cutting machine according to claim 1, characterized in that: the machine body comprises a base and a rocker arm, the bottom end of the rocker arm is rotatably connected to the base, and the saw blade is arranged on the rocker arm.