CN204172384U - A kind of numerical control stamping machine tool of linear motor direct drive - Google Patents

Abstract

The utility model discloses a numerically controlled stamping machine tool directly driven by a linear motor, which comprises a bed, a power device arranged on the upper end of the bed, a mold frame arranged at the lower end of the power device and capable of reciprocating up and down under the drive of the power device, The punch arranged at the lower end of the formwork, and the workbench arranged on the upper surface of the lower end of the bed, the workbench is located below the punch, the power device adopts a linear motor, and the formwork is connected with the secondary of the linear motor , and the formwork can reciprocate up and down under the secondary drive of the linear motor. The punch press adopts a vertical structure and is directly driven by a linear motor, replacing the traditional "rotary motor + crank connecting rod" drive form, which simplifies the mechanical structure of the machine tool. At the same time, because there is no intermediate motion conversion mechanism, the noise is low and the transmission efficiency is high. , which helps to improve the processing efficiency of the machine tool, the stamping frequency can reach 200 times/min, and it also has the advantages of energy saving, environmental protection, and high degree of automation.

Description

A CNC stamping machine directly driven by a linear motor

technical field

The utility model relates to a stamping machine tool, in particular to a numerically controlled stamping machine tool directly driven by a linear motor.

Background technique

Punching machines are widely used in forming stamping processes such as electronics, communications, vehicles (automobiles, motorcycles, bicycles), and hardware parts. At present, the power of traditional stamping machine tools in my country comes from rotary motors, which require a series of conversion mechanisms to convert rotary motion into reciprocating linear motion. In order to obtain a large enough punching force, a large energy storage flywheel is also required, so there are many intermediate parts. , low transfer efficiency, complex structure, bulky, loud noise and prone to failure. Using linear motor technology, the linear motor-driven stamping machine that directly converts electrical energy into mechanical energy can realize the reciprocating linear motion of the punch without any intermediate conversion components, avoiding energy loss and wear caused by intermediate transmission. Improved delivery efficiency. The stamping machine tool directly driven by a linear motor has the characteristics of simple structure, small size, light weight, low noise, low energy consumption, and short production cycle, which helps to improve production efficiency, save production costs, and improve economic benefits of enterprises. my country is a big country in the use of machine tools and a big manufacturing country. The export of mechanical and electrical products is increasing every year. With the continuous development of processing technology in the world's machine tool industry, linear motor drive technology will be a direction for the development of machine tools. As a big country in machine tool use and manufacturing In a big country, it is of great significance to design a stamping machine tool driven by an advanced linear motor.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a numerically controlled stamping machine tool directly driven by a linear motor to make up for the low transmission efficiency, complex structure, bulky volume, loud noise, and Easy to produce faults and other defects.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A CNC stamping machine tool directly driven by a linear motor, comprising a bed, a power device arranged on the upper end of the bed, a mold frame arranged at the lower end of the power device and capable of reciprocating up and down under the drive of the power device, and a mold frame arranged at the lower end of the power device The punch, and the workbench arranged on the upper surface of the lower end of the bed, the workbench is located below the punch, it is characterized in that the power device adopts a linear motor, and the mold base is connected with the secondary of the linear motor, And the formwork can reciprocate up and down under the secondary drive of the linear motor.

Further, the utility model also includes a primary positioning seat, the bed has a horizontal intermediate mounting plate, the primary positioning seat is fixed at the center of the intermediate mounting plate, and the primary positioning of the linear motor is arranged on the primary positioning seat Inside.

Further, the utility model also includes a guide mechanism, each of the two ends of the intermediate mounting plate is provided with a locking slider, and the guide mechanism includes two cylindrical ball guide rails, and the two cylindrical ball guide rails are respectively installed on two Located in the locking sliders at both ends of the middle mounting plate, the lower ends of the two cylindrical ball guide rails are fixedly connected to the formwork.

Further, the utility model also includes a buffer mechanism, the buffer mechanism includes a disc spring and a spring mounting seat, the secondary of the linear motor is connected to the mold frame through the spring mounting seat, and the disc spring is arranged on the spring mounting seat between the formwork.

Further, two limit brackets are respectively provided at both ends of the workbench, and the two limit brackets respectively cooperate with the two ends of the formwork to limit the downstroke of the formwork.

Preferably, a rubber pad is provided on the upper surface of the limiting bracket.

Further, the utility model also includes a control system, the control system includes an electrical control cabinet and a numerical control operation panel connected with the electrical control cabinet, a position sensor and a grating, the electrical control cabinet is provided with a PLC, and the position sensor is used to detect the stroke of the formwork, When the mold base exceeds the limit stroke, the position sensor feedback signal to PLC, PLC controls the linear motor to power off, and at the same time locks the locking mechanism of the slider to lock the cylindrical ball guide rail; the grating is used to detect the position of the punch, when the grating When the downward movement of the punch is detected to reach the set position, the grating feedback signal is sent to the PLC, and the PLC controls the linear motor to power off and make its phase sequence change, and the secondary of the linear motor moves upward in the opposite direction.

Compared with the traditional punching machine, the punching machine tool directly driven by the linear motor designed by the utility model has the following advantages:

1. The punch press of this utility model adopts a vertical structure, which is directly driven by a linear motor, replacing the traditional driving form of "rotary motor + crank connecting rod", which simplifies the mechanical structure of the machine tool, and because there is no intermediate motion conversion mechanism, therefore The transmission efficiency is high, the dynamic response performance of the machine tool is improved, and the processing efficiency of the machine tool is also improved. After inspection, the stamping frequency of the machine tool of the utility model can reach 200 times/min.

2. Since the utility model is directly driven by a linear motor, there is an air gap between the primary and the secondary of the linear motor, there is no contact between the primary and the secondary, and there is almost no mechanical wear.

3. Since the utility model has no traditional intermediate motion conversion mechanism, the noise is very small during operation.

4. Since the utility model does not need any intermediate motion conversion mechanism to realize power transmission, the energy utilization rate is high, the energy consumption of the machine tool is reduced, and energy saving and environmental protection are achieved.

5. The utility model adopts the numerical control system to realize the automatic control of the machine tool, the operation is convenient and reliable, and the degree of automation is high. At the same time, the stamping stroke can be adjusted according to the needs. In addition, due to the addition of the grating and the numerical control closed-loop control system, the mover of the linear motor High movement precision.

Description of drawings

Fig. 1 is a structural schematic diagram of a numerically controlled punching machine tool directly driven by a linear motor of the present invention.

In the figure, 1—bed, 2—limiting bracket, 3—rubber pad, 4—worktable, 5—mold base, 6—disc spring, 7—spring mounting seat, 8—primary positioning seat, 9—lock Tight slider, 10—cylindrical ball guide rail, 11—secondary of linear motor, 12—primary mounting seat, 13—primary of linear motor, 14—NC operation panel, 15—grating.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to the accompanying drawings, a CNC stamping machine directly driven by a linear motor includes a bed 1, a power unit, a mold frame 5, a punch and a workbench 4, wherein the power unit adopts a cylindrical linear motor, and the primary installation of the linear motor The seat 12 is fixedly arranged in the middle of the top of the bed 1, the primary 13 of the linear motor and the secondary 11 of the linear motor are located inside the bed 1, the secondary 11 of the linear motor is installed in the primary 13 of the linear motor; there is a block under the top of the bed 1 The middle mounting plate is arranged horizontally, the center of the middle mounting plate is provided with a primary positioning seat 8, the primary positioning seat 8 is cylindrical, and the primary positioning seat 13 of the linear motor is installed in the primary positioning seat 8; the formwork 5 and the linear motor secondary 11 The lower end of the mold frame is connected, and the mold frame 5 can reciprocate up and down under the drive of the linear motor secondary 11; Station 4 is located below the punch.

The primary 13 of the linear motor is fixed on the machine tool. When the linear motor is powered on, the motor generates an air-gap magnetic field, and the air-gap magnetic field will move along the linear direction as time changes. The induced electromotive force and current, under the action of the induced current and the air gap magnetic field, the electromagnetic thrust pushes the secondary 11 of the linear motor to move downward with the mold frame 5, and the punch at the lower end of the mold frame 5 punches the workpiece on the workbench 4; After the punch is in place, the linear motor is powered off and the phase sequence of the linear motor is changed to generate an upward electromagnetic thrust. The secondary 11 of the linear motor drives the mold frame 5 to accelerate upward and then decelerate to the initial position to complete a stamping.

As a further improvement to the above-mentioned technical solution, the utility model also includes a guide mechanism. A locking slider 9 is provided at both ends of the middle mounting plate. The guide mechanism includes two cylindrical ball guide rails 10, two cylindrical ball guide rails 10 are respectively installed in two locking sliders 9 located at both ends of the middle mounting plate, and the lower ends of the two cylindrical ball guide rails 10 are connected to the formwork 5 . When the mold base 5 moves downward, the two ends of the mold base 5 are guided by the cylindrical ball guide rail 10, so as to ensure that the mold base has high motion accuracy; When the stroke range is limited, the locking mechanism of the locking slider 9 locks the cylindrical ball guide rail 10 to prevent accidents. It should be noted that installing a locking slider in the vertical direction of the guide rail to lock the guide rail when the power is cut off belongs to the prior art.

As a further improvement to the above technical solution, the utility model also includes a buffer mechanism, the buffer mechanism includes a disc spring 6 and a spring mounting seat 7, the linear motor secondary 11 is connected with the mold frame 5 through the spring mounting seat 7, and the disc spring 6 is arranged between the spring mounting seat 7 and the mold frame 5 . When stamping the workpiece, the butterfly spring 6 buffers the secondary 11 of the linear motor to prevent the secondary 11 of the linear motor from being deformed by force and cause the motor to fail, thereby protecting the secondary.

As a further improvement to the above-mentioned technical scheme, a limit bracket 2 is provided at both ends of the workbench 4. When the formwork 5 moves downward to reach the limit stroke, the two ends of the formwork 5 are connected to the two limit brackets 2 respectively. The top contact of the mold base 5, that is, the two ends of the mold base 5 are stopped by the stop bracket 2 to move downward, so that the limit stroke of the mold base 5 is limited. Of course, in order to play the role of shock absorption and buffering, a rubber pad 3 can also be arranged on the upper surface of the limit bracket 2 .

As a further improvement to the above technical solution, the utility model also includes a control system, the control system includes an electrical control cabinet and a numerical control operation panel 14 connected with the electrical control cabinet, a position sensor and a grating 15, and a PLC is arranged in the electrical control cabinet. The sensor is used to detect the stroke of the mold base 5. When the mold base 5 exceeds the limit stroke, the position sensor feeds back a signal to the PLC, and the PLC controls the linear motor to power off, and at the same time locks the locking mechanism of the slider 9 to lock the cylindrical ball guide rail 10. Dead; the grating 15 is used to detect the position of the punch. When the grating 15 detects that the punch moves downward to the set position, the grating 15 feeds back a signal to the PLC, and the PLC controls the linear motor to power off and change its phase sequence. The motor secondary 11 moves upward in reverse. When working, press the start button on the numerical control operation panel 14, the PLC controls the linear motor to power on, and the linear motor secondary 11 drives the mold base 5 to go down. When the grating 15 detects that the punch is in place, the grating 15 feeds back a signal to the PLC, and the PLC controls The linear motor is powered off and its phase sequence is changed to generate an upward electromagnetic thrust. The secondary 11 of the linear motor drives the formwork 5 to accelerate upward and then decelerate to the initial position.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limit the technical solutions. Although the applicant has described the utility model in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that, Those who make modifications or equivalent replacements to the technical solutions of the present invention without departing from the purpose and scope of the technical solutions shall be included in the scope of the claims of the present invention.

Claims (7)

1. A numerically controlled stamping machine tool directly driven by a linear motor, comprising a bed, a power unit arranged on the upper end of the bed, a mold base arranged at the lower end of the power unit and capable of reciprocating up and down under the drive of the power unit, and a mold base arranged on the mold The punch at the lower end of the frame and the workbench arranged on the upper surface of the lower end of the bed, the workbench is located below the punch, it is characterized in that the power device adopts a linear motor, and the secondary of the mold base and the linear motor Connected, and the formwork can reciprocate up and down under the secondary drive of the linear motor. 2. The numerically controlled stamping machine tool directly driven by a linear motor according to claim 1, further comprising a primary positioning seat, the bed has a horizontally arranged intermediate mounting plate, and the primary positioning seat is fixed on At the central position of the intermediate mounting plate, the primary positioning of the linear motor is arranged in the primary positioning seat. 3. The numerically controlled stamping machine tool directly driven by a linear motor according to claim 2, further comprising a guide mechanism, a locking slider is respectively arranged at both ends of the intermediate mounting plate, and the guide mechanism It includes two cylindrical ball guide rails, and the two cylindrical ball guide rails are respectively installed in two locking sliders located at both ends of the middle mounting plate, and the lower ends of the two cylindrical ball guide rails are fixedly connected to the formwork. 4. The numerically controlled stamping machine tool directly driven by a linear motor according to claim 1, further comprising a buffer mechanism, the buffer mechanism comprising a butterfly spring and a spring mount, the secondary of the linear motor passing through The spring mounting seat is connected with the mold base, and the disk spring is arranged between the spring mounting base and the mold base. 5. The numerically controlled stamping machine tool directly driven by a linear motor according to claim 1, wherein a spacer bracket is respectively provided at both ends of the workbench, and the two spacer brackets are respectively connected to the two sides of the formwork. Cooperate with the end to limit the downstroke of the formwork. 6. A numerically controlled stamping machine directly driven by a linear motor according to claim 1, wherein a rubber pad is provided on the upper surface of the limit bracket. 7. A kind of linear motor direct-driven numerical control stamping machine tool according to claim 3, is characterized in that, also comprises control system, and control system comprises electrical control cabinet and the numerical control operation panel that is connected with electrical control cabinet, position sensor and grating , There is a PLC in the electrical control cabinet, and the position sensor is used to detect the stroke of the mold base. When the mold base exceeds the limit stroke, the position sensor feeds back the signal to the PLC, and the PLC controls the linear motor to power off, and locks the locking mechanism of the slider at the same time. Lock the cylindrical ball guide rail; the grating is used to detect the position of the punch. When the grating detects that the punch moves downward to the set position, the grating feeds back a signal to the PLC, and the PLC controls the linear motor to power off and make its phase sequence occur. change, the secondary of the linear motor moves upward in the opposite direction.