CN108859205A - A kind of novel multi link heavy duty servo-pressing machine - Google Patents

Abstract

The invention discloses a novel multi-link heavy-duty servo press, which includes a frame, a slider and a transmission mechanism; the frame includes a pair of slide rails arranged between a base and a top plate; Drive the slider to slide between the slide rails through the transmission mechanism; the transmission mechanism includes a connecting rod; a pair of crank slider mechanisms are arranged at the top of the connecting rod, which are mirror images of each other and placed on the top of the top plate, and the other end is connected to the power device; the bottom end of the connecting rod There is a pair of toggle mechanisms, which are mirror images of each other and placed at the bottom of the top plate, and the other end is connected to the slider. Through the multi-stage deceleration and torque increasing device, the pressure of the press is increased; the dual-degree-of-freedom parallel structure and the dual-servo motor parallel drive method are adopted to increase the overall power of the press, effectively solving the problems of synchronous servo motor and dynamic interference and power loss; The structure rigidity and stability are improved through the anti-symmetric crank slider mechanism, the mechanical life of the press and the stability of the power and torque output of the actuator of the press are improved, and it has better control performance.

Description

A new multi-link heavy-duty servo press

technical field

The invention relates to a press, in particular to a novel multi-link heavy-duty servo press.

Background technique

Presses (including punch presses and hydraulic presses) are versatile presses with exquisite structure. With the characteristics of wide application and high production efficiency, the press can be widely used in cutting, punching, blanking, bending, riveting and forming processes.

Presses are divided into three categories: screw presses, crank presses and hydraulic presses.

Crank presses are also called mechanical presses.

The screw press has no fixed bottom dead center, and for larger die forgings, it can be formed by multiple strikes, and single strike, continuous strike and inching can be performed. The impact force is related to the deformation of the workpiece. The impact force is small when the deformation is large, and the impact force is large when the deformation is small (such as cold shock). In these respects it is similar to a forging hammer. But its strike force is closed by the frame, so it works smoothly, and its vibration is much smaller than that of a forging hammer, and it does not need a large foundation.

The lower part of the press is equipped with a forging ejection device.

The screw press has the functions of various forging machines such as die forging hammer and mechanical press, and has strong versatility. It can be used for die forging, punching, deep drawing and other processes.

In addition, the screw press has a simple structure and is easy to manufacture, so it is widely used.

But, there is following deficiency in existing press machine,

1. It is difficult for servo motors in large machine tools to meet the needs of high power and high torque;

2. The synchronous control error of the servo motor;

3. The backlash of the meshing gear in the reduction system will cause a phase difference between the input ends of the servo motor, which will cause problems such as motion interference and power loss of the synchronous servo motor, thereby reducing the effective output capacity of the servo press.

Contents of the invention

In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a new type of multi-link heavy-duty servo with rigidity and stability in structure, stable power and torque output, and better control performance. press.

In order to achieve the above object, the present invention adopts the following technical solutions:

A new multi-link heavy-duty servo press, including a frame, a slider and a transmission mechanism; the frame includes a pair of slide rails arranged between the base and the top plate; the transmission mechanism is fixed to the top plate, and the power device passes The mechanism drives the slider to slide between the slide rails;

The transmission mechanism includes a connecting rod;

The top end of the connecting rod is equipped with a pair of crank slider mechanisms, which are mirror images of each other and placed on the top of the top plate, and the other end is connected to the power unit;

The bottom end of the connecting rod is provided with a pair of toggle mechanisms, which are mirror images of each other and placed at the bottom of the top plate, and the other end is connected to the slider.

The slider crank mechanism includes a crankshaft whose shaft is fixed on the top of the top plate, one end of the crankshaft is connected to the connecting rod through a hinged push rod, and the other end is connected to the power device through a hinged push rod.

The above-mentioned toggle mechanism includes a push rod, a guide rod and a foot rod hinged at one end by the same hinge shaft,

The other end of the push rod is hinged to the connecting rod, the other end of the guide rod is hinged to the bottom of the top plate, and the other end of the foot rod is hinged to the slider.

The above-mentioned power device includes a ball screw driven by a motor, the bottom of the nut is hinged with a crank slider mechanism, and the screw is driven by electrodes;

The screw rod is provided with intersecting threads.

Further, the above motor drives the screw to rotate through the transmission gear set.

The above-mentioned slide rail is a cylinder with a cavity inside, and the inner and opposite sides of the cavity are respectively provided with slide grooves;

Both ends of the slide block are provided with slide bars matching the chute.

The bottom of the slider is connected to the upper formwork, and the top surface of the base is fixed to match the lower formwork.

The above-mentioned transmission mechanism is 2 groups.

The benefits of the present invention are:

A novel multi-link heavy-duty servo press of the present invention has the following advantages:

1. The ball screw mechanism in the press is a high-efficiency, energy-saving and precise transmission mechanism, which has many excellent characteristics such as high efficiency, high precision, high-speed characteristics and high wear resistance, and the ball screw is a variety of numerical control The key components of the machine tool transmission system play a key role in improving the sensitivity and positioning accuracy of the transmission system.

2. The method of improving the synchronization accuracy of the servo motor and the mechanical forced synchronization is adopted, that is, the transmission gear set is used to synchronize the mechanical structure, which plays a mandatory role in the phase synchronization of the gears on the low-speed shaft from the structure, and effectively eliminates the movement of the servo motor. The degree of interference and power loss has the greatest impact on the meshing gap between the small (master) gear and the intermediate gear (slave), thus effectively solving the problems of motion interference and power loss between synchronous servo motors.

3. The double-degree-of-freedom parallel structure effectively solves the problem of motion and power loss in the single-degree-of-freedom mechanism servo press. This mechanism uses the parallel drive mode of double servo motors, which effectively solves the problems of synchronous servo motors and dynamic interference and power loss. The upper half of the link mechanism adopts an anti-symmetric crank slider mechanism, which improves the structural rigidity and stability, improves the mechanical life of the press and the stability of the power and torque output of the press actuator, and has Better control performance.

4. Through connecting rods, foot rods and several push rods, a multi-stage deceleration and torque increasing device is formed, which greatly improves the pressure of the press.

5. The transmission of double servo motors improves the overall power of the press.

Description of drawings

Fig. 1 is a schematic diagram of the appearance structure of a novel multi-link heavy-duty servo press according to the present invention.

Fig. 2 is a structural schematic diagram of a novel multi-link heavy-duty servo press according to the present invention.

Fig. 3 is a cross-sectional view of a structural schematic diagram of the present invention.

Fig. 4 is a structural schematic diagram of the transmission mechanism of the present invention.

The meanings of the marks in the accompanying drawings are as follows: 1, shaft rod, 2, secondary gear, 3, slave gear, 4, nut, 5, wire, 6, push rod, 7, crankshaft, 8, connecting rod, 9, foot rod, 10, slide block, 11, base, 12, top plate, 13, slide, 14, slide bar, 15, cylinder, 16, guide rod.

Detailed ways

The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

A novel multi-link heavy-duty servo press is composed of a frame, a slider 10, a power device and two sets of transmission mechanisms.

The frame is composed of a base 11, a top plate 12 and a pair of supporting cylinders 15; a cavity is arranged inside the cylinder 15, and chute 13 (slide rail) is respectively provided on the inner and opposite sides of the cavity; the slider 10 passes through the The slide bar 14 slides along the chute 13 .

The main body of the transmission mechanism is a connecting rod 8, the top of the connecting rod 8 is provided with a pair of crank sliders 10 mechanisms which are mirror images of each other, and the bottom end is provided with a pair of toggle mechanisms which are mirror images of each other.

The crank slider 10 mechanism is composed of the crankshaft 7 whose shaft is fixed on the top of the top plate 12 and the push rod 6 hinged at both ends of the crankshaft 7. powerplant.

The power device includes a ball screw 5 driven by a servo motor through a transmission gear set. The bottom of the nut 4 is hinged to the push rod 6 of the crank slider 10 mechanism. .

The transmission gear set is made up of shaft rod 1 and main and auxiliary gears 2 at both ends, the main gear is tooth-connected with the slave gear 3 at the end of the screw mandrel 5, and the auxiliary gear is connected with the motor shaft.

The toggle mechanism is composed of a push rod 6, a guide rod 16 and a foot rod 9, one end of which is hinged with the same hinge shaft and the same hole, the other end of the push rod 6 is hinged with the connecting rod 8, and the other end of the guide rod 16 is hinged at the bottom of the top plate 12, The other end of foot bar 9 is hinged slide block 10.

During further use, the bottom of the slide block 10 is connected to the upper formwork, and the top surface of the base 11 is fixed to a matching lower formwork, and the workpiece is placed on the lower formwork. After the molds are closed, the workpiece is formed under pressure.

Structural transmission principle:

The press of the present invention drives two I-level transmission gears (pinion 2) synchronously through two servo motors, and the I-level transmission gear (pinion 2) drives the II-level transmission through the transmission shaft (shaft 1) through gear transmission. The gear (main gear) turns, which turns the ball screw.

The ball screw drives the screw nut 4 to move leftward (rightward) by clockwise (counterclockwise). (The lead screw nut 4 is installed on the guide rail. For the clear expression of the parts, the drawings of the present invention hide the relevant parts), thereby driving the movement of the two-degree-of-freedom transmission mechanism, and finally driving the upward (downward) movement of the slider 10 to complete Press down and lift action of the press.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (8)

1. A novel multi-link heavy-duty servo press is characterized in that it comprises a frame, a slide block and a transmission mechanism; the frame comprises a pair of slide rails located between the base and the top plate; the transmission mechanism and the top plate Fixed, the power device drives the slider to slide between the slide rails through the transmission mechanism; The transmission mechanism includes a connecting rod; The top end of the connecting rod is equipped with a pair of crank slider mechanisms, which are mirror images of each other and placed on the top of the top plate, and the other end is connected to the power unit; The bottom end of the connecting rod is provided with a pair of toggle mechanisms, which are mirror images of each other and placed at the bottom of the top plate, and the other end is connected to the slider. 2. A novel multi-link heavy-duty servo press according to claim 1, wherein the crank-slider mechanism includes a crankshaft whose shaft is fixed on the top of the top plate, and one end of the crankshaft is connected to each other through a hinged push rod. The other end is connected to the power unit through a hinged push rod. 3. A novel multi-link heavy-duty servo press according to claim 1, wherein the toggle mechanism includes a push rod, a guide rod and a foot rod whose ends are hinged by the same hinge shaft, The other end of the push rod is hinged to the connecting rod, the other end of the guide rod is hinged to the bottom of the top plate, and the other end of the foot rod is hinged to the slider. 4. A novel multi-link heavy-duty servo press according to claim 1, wherein the power unit includes a motor-driven ball screw, the bottom of the nut is hinged to a crank slider mechanism, and the screw is driven by an electrode. drive; The screw rod is provided with intersecting threads. 5. A novel multi-link heavy-duty servo press according to claim 4, wherein the motor drives the screw to rotate through a transmission gear set. 6. A novel multi-link heavy-duty servo press according to claim 1, wherein the slide rail is a cylinder with a cavity inside, and slide grooves are respectively provided on the inner and opposite sides of the cavity; Both ends of the slide block are provided with slide bars matching the chute. 7. A new type of multi-link heavy-duty servo press according to claim 1, characterized in that the bottom of the slider is connected to the upper template, and the top surface of the base is fixed and matched with the lower template. 8. A novel multi-link heavy-duty servo press according to claim 1, wherein there are two sets of transmission mechanisms.