CN107718692A - A kind of magnetic material hydraulic press automatic blank fetching equipment and take blank technology - Google Patents

Abstract

The invention discloses an automatic billet removal device and a billet removal method for a magnetic material hydraulic press, and belongs to the technical field of magnetic material production equipment. It includes a controller for controlling the entire equipment, a blank take-off machine arranged on the discharge side of the hydraulic press, and a blank take-off robot arranged on either side of the blank take-off machine, the blank take-off robot and the blank take-off machine are respectively It is electrically connected with the controller, and the blank taking robot sequentially takes away at least one layer of magnetically formed blanks coded on the blank taking machine. The present invention adopts the robot with small size and small footprint, which can better meet the needs of intelligent production for some enterprises with relatively narrow sites, and is suitable for the large-scale production of enterprises; Take away at least one layer of magnetically formed blanks stacked on the blank taker, and place the blanks neatly on the pallet. The magnetically formed blanks are not easy to be damaged, and the production pass rate of blanks is high, which reduces manual blanking and effectively improves work efficiency.

Description

A kind of equipment and method for automatic billet removal of magnetic material hydraulic press

technical field

The invention belongs to the technical field of magnetic material production equipment, and more specifically relates to an automatic billet removal device and method for a magnetic material hydraulic press.

Background technique

Generally speaking, magnetic materials refer to strong magnetic substances. Modern magnetic materials have been widely used in our lives, such as permanent magnet materials used as motors, core materials used in transformers, and magneto-optical disks used as memories. Magnetic recording floppy disks for computers, etc. It is generally considered that magnetic materials refer to substances that can directly or indirectly generate magnetism from transition elements such as iron, cobalt, nickel and their alloys; magnetic materials can be divided into soft magnetic materials and hard magnetic materials according to the difficulty of demagnetization after magnetization. The material that is easy to demagnetize is called soft magnetic material, and the material that is not easy to demagnetize is called hard magnetic material. Generally speaking, the remanence of soft magnetic materials is small, and that of hard magnetic materials is relatively large. In recent years, with the increasing market demand for magnetic material products and the continuous upgrading of customer products, the requirements for the magnetic performance and product characteristic stability of magnetic material products are getting higher and higher, especially for hard magnetic materials, such as permanent magnets Oxygen. At present, magnetic materials are generally formed by hydraulic presses. There are static molds and movable molds on the press. After the pressing is completed, the blanks are output from the discharge side, and then the blanks are manually removed and stacked on the pallet. The scheme can meet the production requirements to a certain extent; however, this scheme not only has low production efficiency and automation, but also has high labor intensity. In order to improve production efficiency and reduce labor intensity, people have carried out long-term exploration and proposed various various solutions.

After searching, patent document 1: Chinese patent CN201310501570.4 discloses an automatic billet-taking device, which includes a frame, on which a manipulator is arranged, and between the frame and the manipulator is provided with a device capable of driving the manipulator along the machine. The longitudinal translation driving mechanism of the vertical reciprocating translation of the frame. On both sides of the frame, there are respectively a tray sending lift frame and a tray receiving lift frame for stacking the blank trays, and the blank trays stacked on the tray tray elevators are located on the longitudinal translation track of the manipulator. Below, although the billet taking equipment can complete the stacking of blanks, the overall structure of the equipment occupies a large area. For small workshops, it cannot be used in a large area, which will affect the scale of production. In addition, for multi-layer billets If the stacking of pieces is not done, the equipment will take uneven blanks, on the one hand, it will cause damage to the blanks, and on the other hand, it will easily cause confusion in stacking, and the use effect will be compromised. Patent document 2: Chinese patent CN201110097403.9 discloses an automatic billet-taking mechanism for the production of permanent ferrite-tile magnets, including a fixed frame, a lifting frame, and a ball screw fixing seat on the fixed frame. The rod fixing base is equipped with a ball screw that moves up and down controlled by the motor one. The lifting bracket is installed on the ball screw, and the lifting bracket moves up and down relative to the fixed frame under the control of the motor one. The suction cup mounting plate is connected to the second motor through a belt, and the suction cup mounting plate moves horizontally relative to the lifting bracket under the control of the second motor. It is stacked on the conveyor belt, and then the billets are manually removed and stacked on the pallet. The work efficiency is low and the labor intensity is high.

Contents of the invention

1. The problem to be solved

In view of the problem that the existing automatic billet taking equipment occupies a large area and cannot realize the billet taking and stacking of multi-layer billets, the purpose of the present invention is to provide an automatic billet taking equipment for a magnetic material hydraulic press. The billet taking robot occupies a small area and can not only Satisfies the large-scale production of magnetic forming blanks, and through the cooperation of the blank taker and the blank taker robot, the blank taker robot can take away at least one layer of magnetic forming blanks placed on the blank taker, and place the blanks neatly on the pallet , Reduce labor intensity and improve work efficiency.

Another object of the present invention is to provide a method for removing blanks from the above-mentioned equipment. This method realizes the orderly connection between the blank taking machine and the blank taking robot. During the production time of the hydraulic press, the blank taking robot can quickly remove and stack At least one layer of the blank is magnetically formed on the blank taker, and the blanks are neatly stacked on the pallet, which effectively saves production time and does not hinder the normal production of the hydraulic press, reduces labor intensity and improves work efficiency.

2. Technical solution

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

The automatic billet removal equipment for a magnetic material hydraulic press of the present invention includes a controller for controlling the entire device, a billet removal machine arranged on the discharge side of the hydraulic press, and a billet removal robot arranged on any side of the billet removal machine, The blank taking robot and the blank taking machine are respectively electrically connected to the controller, and the blank taking robot sequentially takes away at least one layer of magnetically formed blanks coded on the blank taking machine.

In a possible implementation of the present invention, the controller includes a PLC control unit, the PLC control unit has a panel and a plurality of buttons, wherein a plurality of buttons are arranged on the panel, and the controller is manually controlled by the buttons to adjust the first step of the robot to remove the blank. A grab location.

In a possible implementation of the present invention, the blank taking machine includes a frame, a blank suction cup, a conveyor belt and a lifting mechanism, the conveyor belt and the blank suction cup are arranged on the frame, and the blank suction cup can be Move back and forth, absorb the magnetic forming blank and place it on the conveyor belt, the lifting mechanism is placed under the frame and at least one station is set.

In a possible implementation of the present invention, the robot for removing blanks includes a machine body, a mechanical arm connected to the machine body, and a gripper fixed at the front end of the mechanical arm. The gripper is a rotatable claw, wherein the gripper Made of non-magnetic material.

In a possible implementation manner of the present invention, the blank removing machine further includes a first photoelectric switch and a second photoelectric switch, wherein the motor driving the conveyor belt is a second servo motor, and the second photoelectric switch is arranged on both sides of the conveyor belt And 3-5cm away from the conveyor belt head, the first photoelectric switch is arranged on the rear side of the second photoelectric switch and 3-5cm away from the first photoelectric switch, the central axes of the first photoelectric switch and the second photoelectric switch are respectively in line with the center of the conveyor belt The axes are perpendicular to each other, and the first photoelectric switch, the second photoelectric switch and the second servo motor are all electrically connected to the controller.

In a possible implementation manner of the present invention, the non-magnetic material is stainless steel.

In a possible implementation manner of the present invention, a buffer pad is provided inside the claw, wherein the material of the buffer pad is rubber, soft glass or cotton cloth.

In a possible implementation of the present invention, the lifting mechanism includes a first servo motor, a hydraulic cylinder, and a telescopic rod, the first servo motor is electrically connected to the controller, the telescopic rod is placed in the hydraulic cylinder, and the head of the telescopic rod Fixedly connected with the frame, the first servo motor drives the telescopic rod to move and drives the frame to move up and down with multiple stations.

The present invention also provides a blanking method for automatic blanking equipment of a magnetic material hydraulic press, which includes the following specific steps:

Step S101, input the action time t from one billet removal to stacking by the billet removal robot, the time T from feeding to the billet fall, and the number of magnetically formed blanks in one mold is n, set nt<T;

Step S102, the lifting mechanism raises the conveyor belt to the highest point, at least one layer of magnetic forming blanks is conveyed by the conveyor belt and triggers the first photoelectric switch, the first photoelectric switch outputs a signal to the controller, and the controller triggers the robot to take the billet And the gripper is placed at the first grabbing position; the conveyor belt continues to advance until the magnetic forming blank touches the second photoelectric switch, and the conveyor belt stops advancing;

Step S103, the billet removal robot walks sequentially from the first grabbing position along the set direction and the distance between the magnetically formed blanks, and removes at least one layer of magnetically formed blanks coded on the billet remover until all of them are removed;

Step S104, loop step S102, step S103.

In a possible implementation manner of the present invention, in step S103, the blank-taking robot grabs the magnetically formed blank along each horizontal row in sequence.

3. Beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

(1) The automatic preform extraction equipment for the magnetic material oil press of the present invention adopts the preform extraction robot with small volume and small floor space. For some enterprises with relatively narrow sites, it can better meet the needs of their intelligent production, and is suitable for Large-scale production of enterprises; the billet taking robot can sequentially take away at least one layer of magnetic forming blanks stacked on the blank taking machine, and place the blanks neatly on the pallet. The magnetic forming blanks are not easy to be damaged, which improves the magnetic forming blanks. High production qualification rate, reducing manual billet removal, and effectively improving work efficiency;

(2) In the automatic preform removal equipment for the magnetic material hydraulic press of the present invention, the first grabbing position of the preform removal robot needs to be determined according to the number of magnetically formed blanks of a mold of the hydraulic press, that is, the X-axis and the Y-axis are determined, thereby determining the action. Depending on the size of the range, the first grabbing position of the billet-taking robot is selected, and the precise positioning is performed manually, so as to ensure that the billet-taking robot can accurately grab the magnetically formed blank, avoid damage to the magnetically formed blank by the gripper, and also ensure the magnetic forming The uniformity of the blank on the pallet;

(3) In the automatic billet removal equipment for the magnetic material hydraulic press of the present invention, the gripper of the billet removal robot is made of stainless steel, and a buffer pad is fitted on the inside, so that the gripper can tightly clamp the blank without causing damage to the blank. damage, at the same time, there will be no magnetic force between the stainless steel gripper and the blank, and the gripper will place the blank neatly;

(4) The automatic preform removal equipment for the magnetic material oil press of the present invention adopts the cooperation of the first photoelectric switch and the second photoelectric switch, wherein the first photoelectric switch can trigger the action of the preform removal robot, so that the magnetic forming preform has not yet reached the stop position, and the preform is taken out. The gripper of the billet robot has reached the first grabbing position, which saves the action time and ensures the orderly connection between the billet taking robot and the billet taking machine parts; the second photoelectric switch triggers the conveyor belt to stop moving forward, realizing the precision of the magnetic forming blank Positioning so that the gripper is precisely in the first gripping position;

(5) The automatic billet removal equipment of the magnetic material oil press of the present invention, wherein the motors used are all servo motors, and the control performance of the servo motors is good, which provides a strong guarantee for the precise control of the equipment;

(6) The automatic billet removal equipment for the magnetic material oil press of the present invention drives the conveyor belt to drop the height of a blank through the lifting mechanism, when the blank sucker moves the newly obtained blank to the top of the blank that has been placed on the conveyor belt Release the blanks so that the newly obtained blanks can be placed on the blanks that have been placed on the conveyor belt without a height difference; in this way, several layers of blanks are stacked on the conveyor belt to effectively prevent the blanks from being damaged when they fall ;

(7) The blanking method of the automatic blanking equipment of the magnetic material oil press of the present invention, while the blanking robot grabs the magnetic forming blank, the blanking machine still works normally, and the time for the blanking robot to take a magnetic forming blank is nt It is less than the time T from feeding to blanking. On the one hand, it can prevent the gripper from touching the conveyor belt, eliminating the hidden danger of damage to the conveyor belt and the gripper. When the hydraulic press works continuously and normally, the steps are connected more compactly, which saves production time.

Description of drawings

The technical solutions of the present invention will be described in further detail below in conjunction with the drawings and embodiments, but it should be known that these drawings are only designed for the purpose of explanation, and therefore are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are only intended to conceptually illustrate the architectural configurations described herein and are not necessarily drawn to scale.

Fig. 1 is the structural representation of the blank machine of the automatic blank extraction equipment of the magnetic material hydraulic press of the present invention;

Fig. 2 is a structural schematic diagram of a robot for taking blanks of the automatic blanking equipment for a magnetic material hydraulic press of the present invention;

Fig. 3 is a structural schematic diagram of the gripper of the billet-taking robot of the present invention;

Fig. 4 is the structural representation of the conveyer belt of the blank taking machine of the present invention;

Fig. 5 is a stacking structure diagram of magnetic forming blanks.

In the figure: 1. Hydraulic press;

2. Blank take-off machine; 210, frame; 220, blank take-off suction cup; 230, conveyor belt; 240, lifting mechanism;

3. Blank-taking robot; 310, machine body; 320; mechanical arm; 330, gripper; 331, buffer pad;

4. The first photoelectric switch;

5. The second photoelectric switch;

6. Magnetic forming blanks.

detailed description

The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings, which form a part hereof, and in which is shown by way of example an exemplary embodiment of the invention in which it can be practiced. While these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments can be implemented and that various changes can be made in the invention without departing from the spirit and scope of the invention. . The following more detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but merely to illustrate and not limit the description of the features and characteristics of the invention, in order to suggest the best mode of carrying out the invention , and are sufficient to enable those skilled in the art to implement the present invention. Accordingly, the scope of the invention is to be limited only by the appended claims.

The following detailed description and example embodiments of the invention may be better understood when taken in conjunction with the accompanying drawings, in which elements and features of the invention are identified by reference numerals.

Example 1

Magnetic material hydraulic press 1 automatic blanking equipment of the present invention comprises a controller for controlling the whole equipment, a blanking machine 2 arranged on the discharge side of hydraulic press 1 and a blanking machine 2 arranged on any side of said blanking machine 2 ( Both can be on the left side or the right side of the conveyor belt, instead of the front side), the billet removal robot 3 and the billet removal machine 2 are electrically connected to the controller respectively, and the billet removal robot 3 sequentially takes away the codes and places them in the fetching Three-layer magnetically formed blank 6 on blank machine 2. What needs to be explained here is that the magnetic materials involved in the present invention are divided into soft magnetic materials, permanent magnetic materials and functional magnetic materials according to their use, wherein soft magnetic materials and permanent magnetic materials have a wide range of applications, and both soft magnetic materials and permanent magnetic materials It has a certain degree of magnetism. When these materials meet the alloy of iron-cobalt-nickel composition, the iron-cobalt-nickel material will be magnetized.

Since the blanking robot 3 can realize multi-dimensional rotation in space, the first grabbing position of its action needs to be determined according to the number of 6 pieces of magnetically formed blanks in one mold of the hydraulic press 1 (the number of pieces in one mold of different magnetically formed blanks 6 Inconsistent, including 48 pieces, 60 pieces, etc., resulting in a change in the position of the magnetic forming blank 6 on the conveyor belt 230), that is, to determine the X-axis and Y-axis, thereby determining the range of motion, so the controller includes a PLC control unit, the PLC control unit has a panel and several buttons, some of which are set on the panel, and the controller is manually controlled by the buttons to adjust the first grabbing position of the robot 3 for billet removal, and the precise positioning is performed manually, thereby ensuring that the robot robot for billet removal 3, the precise grasping of the magnetic forming blank 6 prevents the gripper 330 from damaging the magnetic forming blank 6, and at the same time ensures the uniformity of the magnetic forming blank 6 on the pallet.

As shown in Figure 1, the blanking machine 2 wherein includes frame 210, blanking suction cup 220, conveyor belt 230 and lifting mechanism 240, conveyor belt 230, blanking suction cup 220 are arranged on the frame 210, and blanking suction cup 220 can be Move back and forth along the outside of the frame 210, absorb the magnetic forming blank 6 and place it on the conveyor belt 230, the lifting mechanism 240 is placed under the frame 210 and set three stations, and the three stations correspond to three layers of magnetic forming The blank 6 ensures that the magnetically formed blank 6 can be placed on the conveyor belt 230 smoothly.

As shown in FIG. 2 , the small-sized blank-taking robot 3 includes a machine body 310 , a robot arm 320 connected to the machine body 310 , and a gripper 330 fixed at the front end of the robot arm 320 . The gripper 330 is a rotatable claw. It is worth noting that if the iron gripper 330 is used, the iron gripper 330 will be magnetized by the magnetizing wire package of the hydraulic machine 1 during use, so that the gripper 330 has a certain magnetic force. In addition, this The magnetic forming blank 6 of the invention also has a certain magnetic force, which will also magnetize the gripper 330, which inevitably causes the gripper 330 itself to be magnetic. When the iron gripper 330 grabs the blank yard, due to the magnetic As a result, the 6-yard square of the magnetic forming blank will be irregular, and then there will be a problem of blank collision and damage to the blank. In contrast, for the permanent magnet ferrite wet forming automatic billet removal device disclosed in Chinese patent CN201420537236.4, it includes a pick-up stand, which is connected to a walking servo motor for pick-up parts, and the middle of the pick-up stand is set There is a vacuum suction cup, which is connected with the pick-up vacuum pump and the billet lifting servo motor. There is a conveyor belt under the vacuum suction cup on the pick-up platform, which uses a vacuum suction cup. When in use, the above-mentioned problems of the present invention will not appear at all. question,

Therefore inventor passes through a large amount of tests and analysis, claw is made by non-magnetic material, and non-magnetic material is stainless steel material, on the one hand can not produce bonding between claw and magnetic forming blank 6, guarantees magnetic The integrity of the formed blank 6, on the other hand, there is mold release grease on the surface of the magnetic formed blank 6, and the stainless steel claws will not corrode, and have a long service life. In addition, as shown in Figure 3, in order to reduce the wear and tear caused by the hard stainless steel and the blank, a buffer pad 331 is provided inside the claw, wherein the material of the buffer pad 331 is rubber, soft glass or cotton cloth, and the claw will hold the blank Gently grabbing, the buffer pad 331 can play a role in increasing friction.

Example 2

The basic structure of the present embodiment is the same as that in Embodiment 1, the difference is: as shown in Figure 4, the blank machine 2 also includes a first photoelectric switch 4 and a second photoelectric switch 5, the first photoelectric switch 4, the second photoelectric switch The central axis of the photoelectric switch 5 is respectively perpendicular to the central axis of the conveyor belt 230, and the first photoelectric switch 4, the second photoelectric switch 5, and the second servo motor are all electrically connected to the controller.

Wherein the motor that drives conveyor belt 230 is the second servo motor, and the second photoelectric switch 5 is arranged on conveyor belt 230 both sides and is apart from conveyor belt 230 head 3-5cm, and optimum value is 4cm, and it should be noted that, the present invention The width of blank is 4cm, because the head of conveyer belt 230 is circular arc shape and the diameter 8-10cm of deflection roller, if blank is conveyed to near head, then the center of gravity of blank moves down to conveyer belt 230 below, causes The blank is tilted, which is not convenient for the precise grasping of the gripper 330; and the second photoelectric switch 5 is designed to be 3-5cm away from the head of the conveyor belt 230, so that the center of gravity of the magnetic forming blank can always be located above the conveyor belt 230, and in the Under the effect of frictional force, it is parked steadily on the conveyor belt 230.

In addition, the first photoelectric switch 4 is arranged on the rear side of the second photoelectric switch 5 and is 3-5 cm away from the first photoelectric switch 4, and the optimal value is 4 cm. It should be noted that if the distance between the two is too small, the blank When stopping, the gripper 330 of the blank-taking robot 3 has not been positioned above the first grabbing position; if the distance between the two is too large, the difference between the time for the blank-taking robot 3 and the pressing and forming time of the blank is less than 10s , and the action time of the conveyor belt 230 is relatively short, but the first photoelectric switch 4 has triggered the action of the robot 3 for removing blanks, so that the gripper 330 of the robot 3 for removing blanks has to put down the blanks it grabs or randomly stacks the blanks, Cause blank stacking is not neat. The distance between the first photoelectric switch 4 and the second photoelectric switch 5 is 4 cm, and the gripper 330 of the preform removal robot 3 has enough time to move and be positioned above the first gripping position.

Example 3

The basic structure of this embodiment is the same as in Embodiment 2, the difference is that: the lifting mechanism 240 includes a first servo motor, a hydraulic cylinder and a telescopic rod, the first servo motor is electrically connected to the controller, and the telescopic rod is placed in the hydraulic cylinder , the head of the telescopic rod is fixedly connected to the frame 210, and the first servo motor drives the telescopic rod to move and drives the three stations of the frame 210 to move up and down.

The action of the blank take-off machine 2 will be introduced in detail below: the lifting mechanism 240 drives the conveyor belt 230 to drop the height of a blank, and when the blank take-off suction cup 220 moves the newly obtained blank to the top of the blank that has been placed on the conveyor belt 230 The blanks are released at the same time so that the newly obtained blanks are placed on the blanks that have been placed on the conveyor belt 230 without a height drop; so that three layers of blanks are stacked on the conveyor belt 230 in a cycle. The structural design of the blank take-off machine 2 can place the blank on the conveyor belt 230 stably, effectively preventing the blank from being bumped and damaged when it falls.

Example 4

A method for extracting blanks of an automatic blank extracting device for a magnetic material hydraulic press 1, comprising the following specific steps:

Step S101, on the one hand, in order to prevent the gripper 330 from touching the conveyor belt 230 and eliminate the hidden danger of damage to the conveyor belt 230 and the gripper 330, and on the other hand, to ensure that the preform removal robot 3 has enough time to be positioned at the first gripping position , input the action time from one billet removal to stacking by the billet removal robot 3 is 2.4s, the time from feeding to the billet fall is 120s, the number of 6 pieces of magnetically formed blanks in one mold is 48 pieces, set 48*2.4=115.2 s<120s;

Step S102, the lifting mechanism 240 raises the conveyor belt 230 to the highest point, the three-layer magnetic forming blank 6 is transported out by the conveyor belt 230 and triggers the action of the first photoelectric switch 4, the first photoelectric switch 4 outputs a signal to the controller, and the controller Trigger the action of the billet removal robot 3 and place the gripper 330 at the first grabbing position; the conveyor belt 230 continues to advance until the magnetic forming blank 6 touches the second photoelectric switch 5, and the conveyor belt 230 stops advancing;

Step S103, as shown in FIG. 5 , the preform removal robot 3 grabs the magnetic forming blanks 6 in each horizontal row along the set X-axis direction from the first grasping position, and the moving distance of the preform removal robot 3 is The spacing of blanks 6, wherein the spacing of magnetic forming blanks 6 is 2cm, take away the three-layer magnetic forming blanks 6 that are placed on the blank taking machine 2 until all are taken away;

Step S104, loop step S102, step S103.

Claims (10)

1. A kind of blanking equipment of magnetic material hydraulic press automatically, it is characterized in that, comprise the controller that is used to control whole equipment, a blanking machine (2) that is located at hydraulic press (1) discharging side and a blanking machine (2) that is located at described The blank-taking robot (3) on any side of the blank-taking machine (2), the blank-taking robot (3) and the blank-taking machine (2) are electrically connected to the controller respectively, and the blank-taking robot (3) sequentially removes and stacks At least one layer of magnetically formed blanks (6) on the blank breaker (2). 2. The automatic blanking equipment of the magnetic material hydraulic press according to claim 1, wherein the controller includes a PLC control unit, the PLC control unit has a panel and some buttons, wherein some buttons are arranged on the panel, and the button The manual control controller regulates the initial working state of the blank robot (3). 3. The automatic blanking equipment of magnetic material hydraulic press according to claim 2, characterized in that, the blanking machine (2) comprises a frame (210), a blanking sucker (220), a conveyor belt (230) and a lift Mechanism (240), conveyor belt (230), blank sucker (220) are arranged on the frame (210), and the blank sucker (220) can move back and forth along the outside of the frame (210) to suck the magnetic forming blank (6 ) and placed on the conveyor belt (230), the lifting mechanism (240) is placed under the frame (210) and at least one station is set. 4. The automatic blanking equipment for magnetic material hydraulic press according to claim 3, characterized in that, the blanking robot (3) comprises a machine body (310), a mechanical arm (320) connected to the machine body (310) And the gripper (330) fixed on the front end of the mechanical arm (320), the gripper (330) is a rotatable claw, wherein the claw is made of non-magnetic material. 5. The automatic blanking equipment of magnetic material hydraulic press according to claim 3, characterized in that, the blanking machine (2) also includes a first photoelectric switch (4) and a second photoelectric switch (5), wherein the drive transport The motor of the belt (230) is the second servo motor, the second photoelectric switch (5) is arranged on both sides of the conveyor belt (230) and is 3-5cm away from the head of the conveyor belt (230), and the first photoelectric switch is arranged on the second photoelectric switch. The rear side of the switch and apart from the first photoelectric switch (4) 3-5cm, the central axis of the first photoelectric switch (4), the second photoelectric switch (5) is perpendicular to the central axis of the conveyor belt (230) respectively, the first The photoelectric switch (4), the second photoelectric switch (5) and the second servo motor are all electrically connected with the controller. 6. The automatic preform removal equipment for magnetic material hydraulic press according to claim 4, characterized in that, the non-magnetic material is stainless steel. 7. The automatic preform removal equipment for magnetic material hydraulic press according to claim 4, characterized in that, a buffer pad (331) is provided inside the claw, wherein the material of the buffer pad (331) is rubber, soft glass or cotton cloth. 8. According to claim 3 or 5, the automatic billet removal equipment for magnetic material hydraulic press is characterized in that, the lifting mechanism (240) includes a first servo motor, a hydraulic cylinder and a telescopic rod, and the first servo motor and the controller electric Connect, telescopic rod is placed in hydraulic cylinder, the head of telescopic rod is fixedly connected with frame (210), and the first servo motor drives telescopic rod action and drives frame (210) up and down multi-station action. 9. A method for taking blanks of an automatic blanking equipment for a magnetic material hydraulic press, characterized in that it comprises the following specific steps: Step S101, input the action time t from the billet removal robot (3) once from billet removal to stacking, the time T from feeding to the billet fall, the number of magnetically formed blanks (6) in a mold is n, set nt <T; Step S102, the lifting mechanism (240) raises the conveyer belt (230) to the highest point, at least one layer of magnetic forming blank (6) is conveyed out by the conveyer belt (230) and triggers the action of the first photoelectric switch (4), the first The photoelectric switch (4) outputs a signal to the controller, and the controller triggers the robot (3) to take action and the gripper (330) is placed in the first grabbing position; the conveyor belt (230) continues to move forward until the magnetically formed blank (6 ) touches the second photoelectric switch (5), and the conveyor belt (230) stops advancing; Step S103, the billet removal robot (3) walks sequentially from the first grabbing position along the set direction and the distance between the magnetically formed blanks (6), and takes away at least one layer of magnetically formed blanks placed on the billet remover (2). Blank (6), until all take away; Step S104, loop step S102, step S103. 10. The blanking method of the automatic blanking equipment for magnetic material hydraulic press according to claim 9, characterized in that, in step S103, the blanking robot (3) grabs the magnetic forming blanks (6) along each horizontal row sequentially ).