CN109940081A - Novel servo air cushion - Google Patents

Abstract

The invention belongs to the technical field of presses, and relates to a novel servo air cushion. The novel servo air cushion comprises a ball screw mechanism, a synchronous belt transmission mechanism, a servo motor and a position encoder. The ball screw mechanism is fixed on the upper surface of the lower bottom plate through two telescopic rods, and the lower surface of the lower bottom plate is fixed on the horizontal ground through the rack. The lead screw of ball screw mechanism passes the lower plate to the lead screw lower extreme passes through synchronous belt drive mechanism and is connected with servo motor, and servo motor links to each other with position encoder, and position encoder control servo motor is corresponding motion. According to the invention, through reasonable structural design, the upper top plate moves up and down, and the position of the upper top plate is controlled by adopting a position encoder in the stamping process so as to control the system pressure; the mechanical and automatic production of the press machine is realized, and the advantages of saving labor, ensuring production safety and the like are ensured while the production efficiency is ensured.

Description

A new type of servo air cushion

technical field

The invention belongs to the technical field of presses, and relates to a novel servo air cushion.

Background technique

In recent years, with the development of science and technology, the emergence of new materials and the complex shape of products and many other requirements, the traditional press can no longer meet many processing requirements, and the press came into being. The blank holder force acts on the sheet through the blank holder, so that the sheet produces friction between the blank holder and the die to control the flow of the sheet and avoid wrinkling. At the same time, this also causes an increase in tensile stress in the material. Reasonable blank holder force is very important. If the blank holder force is too small, the flow of the sheet cannot be controlled, causing wrinkling; if the blank holder force is too large, although wrinkling can be effectively avoided, it will increase the tensile stress and cause wrinkles. Pull crack. In the press system, the press air cushion plays the role of controlling the blank holder force.

The press air cushion is an accessory system of the press. Its function is to press the sheet material before stretching, and carry out edge blanking during the forming process to prevent the material from wrinkling due to the material flowing too fast during the forming process. The traditional press air cushion generally uses a hydraulic device. Such an air cushion will introduce the energy of the flywheel into the hydraulic cylinder during the return stroke. The energy waste in the whole stamping stroke is serious. In addition, traditional press air cushions, such as pure air cushions and CNC hydraulic air cushions, have their limitations, such as not high enough working pressure and high energy consumption. This forces people to seek a more suitable air cushion device on the basis of the original air cushion.

SUMMARY OF THE INVENTION

The invention provides a new type of servo air cushion, which solves the problems of excessive energy consumption and low working pressure of traditional presses, and achieves the purposes of improving productivity, saving manpower and ensuring production safety.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A new type of servo air cushion includes a ball screw mechanism, a synchronous belt transmission mechanism, a servo motor and a position encoder. The ball screw mechanism is fixed on the upper surface of the lower base plate through two telescopic rods, and the lower surface of the lower base plate is fixed on the level ground through the frame. The lead screw of the ball screw mechanism passes through the lower base plate, and the lower end of the lead screw is connected with the servo motor through the synchronous belt transmission mechanism, and the servo motor is connected with the position encoder, and the position encoder controls the servo motor to move accordingly.

The ball screw mechanism adopts the ball screw to realize the up and down stroke of the servo air cushion, the ball screw mechanism cannot be self-locking, the transmission efficiency is high, the precision is high, the noise is low, and it is suitable for high-speed reciprocating motion.

The ball screw mechanism includes a support column, an upper top plate, a lead screw and a nut; the two sides of the nut are respectively connected with the lower surface of the upper top plate through the support column, the central thread of the nut is connected with the lead screw, and the rotation of the lead screw drives the nut to move up and down , so as to realize the up and down movement of the upper top plate.

The synchronous belt transmission mechanism includes a driving wheel, a driven wheel and a synchronous belt tightly sleeved on the two wheels. The teeth of the synchronous belt mesh with the teeth of the two wheels to realize the transmission without relative sliding, and realize the synchronization of the peripheral speed.

The lower shaft end of the lead screw is connected with the driven wheel of the synchronous belt transmission mechanism, the diameter of the driven wheel is larger than that of the driving wheel, and the driving wheel is connected with the output shaft of the servo motor.

The servo motor is used as the power source of the whole mechanism, and the servo motor transmits the speed, power torque, etc. to the ball screw mechanism through the synchronous belt drive,

When the air cushion of the servo air cushion moves up and down, it is driven by the servo motor, the lead screw rotates to make the upper top plate go up, and the pressure signal is fed back; during the stamping process, the pressure signal is fed back; when the air cushion returns, the force it bears makes the lead screw rotate in the opposite direction. , drive the servo motor to generate electricity, and feed it back to the overall system power grid. Compared with the traditional way of storing the flywheel energy in the hydraulic cylinder or wasting it, this method can save a lot of energy, which has obvious advantages compared with the air cushion device of the transmission.

Beneficial effects of the present invention:

The present invention realizes the up and down movement of the upper top plate through reasonable structural design, and uses the position encoder to control the position of the upper top plate in the stamping process to control the system pressure; realizes the mechanization and automatic production of the press, and ensures the productivity while also ensuring It saves manpower and ensures production safety.

Description of drawings

FIG. 1 is a schematic diagram of the ball screw mechanism of the present invention.

FIG. 2 is a schematic diagram of the servo air cushion of the present invention.

Fig. 3 is a control system diagram of the present invention.

In the picture: 1 frame; 2 lower bottom plate; 3 telescopic rod; 4 supporting column; 5 upper top plate; 6 lead screw; 7 nut; 8 timing belt; 9 servo motor.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

As shown in FIG. 2 , the present invention provides a new type of servo air cushion, which includes a ball screw mechanism, a synchronous belt drive 8 , a servo motor 9 and a position encoder. The servo air cushion device of the invention is a new type of air cushion device, which can realize the mechanization and automatic production of the press, and can ensure the advantages of manpower saving and production safety while ensuring the productivity.

As shown in Figure 1, the present invention adopts the ball screw mechanism to realize the up and down stroke of the top plate 5 of the servo air cushion, the ball screw cannot be self-locked, the transmission efficiency is high, the precision is high, the noise is low, and it is suitable for high-speed reciprocating motion.

As shown in FIG. 1 , the ball screw mechanism includes a support column 4, an upper top plate 5, a lead screw 6 and a nut 7; The central thread is connected with the lead screw 6 , and the rotation of the lead screw 6 drives the nut 7 to move up and down, so as to realize the up and down movement of the upper top plate 5 .

As shown in Fig. 2, the present invention adopts a synchronous belt drive 8, which is composed of a driving wheel, a driven wheel and a transmission belt tightly sleeved on the two wheels. The transmission is realized by the tooth meshing between the synchronous belt teeth and the synchronous pulley, and the two have no relative sliding, and the peripheral speed is synchronized.

As shown in FIG. 2 , the synchronous belt 8 is used for speed transmission between the shaft end of the lead screw 6 and the motor of the present invention. The driven wheel is arranged at the end of the screw shaft, and the driving wheel is connected with the servo motor 9. There is no slippage in the synchronous belt transmission, and the realized transmission is relatively large.

As shown in FIG. 2 , the present invention adopts the servo motor 9 as the power source of the mechanism. The servo motor 9 transmits the speed, power torque, etc. to the ball screw mechanism through the synchronous belt 8 transmission. The nut 7 and the upper top plate 5 pass through the support column 4 When fixed, the nut 7 can move up and down relative to the lead screw 6 through the rotation of the lead screw, so as to drive the upper top plate 5 to move up and down, and cooperate with the slider to realize the stamping stroke.

As shown in Figure 3, when the air cushion of the servo air cushion moves up and down, it is driven by the servo motor 9, the lead screw 6 rotates to make the upper top plate 5 go up, and the pressure signal is fed back; during the stamping process, the feedback is the pressure signal; when the air cushion returns, The bearing force causes the lead screw 6 to rotate in the reverse direction, which drives the servo motor 9 to generate electricity, which is fed back to the overall system power grid. Compared with the traditional method of storing the flywheel energy in the hydraulic cylinder or wasting it, this method can save a lot of energy, compared to The transmission air cushion device has obvious advantages.

It should be noted that, in this document, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply existence between these entities or operations any such actual relationship or sequence.

The above-mentioned specific embodiments further describe in detail the technical problems, technical solutions and beneficial effects solved by the present invention. Therefore, the technical means disclosed by the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiments, but also include the technical means disclosed by the above embodiments. A technical solution composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (2)

1. a kind of novel servo air cushion, which is characterized in that including ball screw framework, synchronous belt drive mechanism, servo motor (9) And position coder；The ball screw framework is fixed on the upper surface of lower plate (2), lower plate by two telescopic rods (3) (2) lower surface is fixed on level ground by rack (1)；The lead screw (6) of ball screw framework passes through lower plate (2), and And lead screw (6) lower end is connect by synchronous belt drive mechanism with servo motor (9), servo motor (9) is connected with position coder, Corresponding sports are done in position coder control servo motor (9)；

The ball screw framework includes support column (4), upper plate (5), lead screw (6) and nut (7)；The two sides of nut (7) It is connected respectively by support column (4) with upper plate (5) lower surface, the center screw thread of nut (7) is connected with lead screw (6), lead screw (6) Rotation drives nut (7) to move up and down, to realize the up and down motion of upper plate (5)；

The synchronous belt drive mechanism includes driving wheel, driven wheel and the synchronous belt (8) being tightly placed on two-wheeled；The lead screw (6) Lower end shaft end be connected with the driven wheel of synchronous belt drive mechanism, driving wheel is connected with the output shaft of servo motor (9)；The silk Thick stick (6) rotation makes upper plate (5) uplink；When air cushion backhaul, the power of receiving rotates backward lead screw (6), drives servo motor (9) Power generation.

2. novel servo air cushion as described in claim 1, which is characterized in that the diameter of the driven wheel is greater than the straight of driving wheel Diameter.