CN104942327A - Electromagnetic clamping claw centering device and using method thereof - Google Patents

Abstract

The invention discloses an electromagnetic claw centering device and a method for using the same. The iron is fixed on one side of the chuck seat, and the inner wall of the chuck seat is equipped with a sliding truncated cone, and the permanent magnet is connected with the sliding truncated cone. There is a limit body on the inner wall of the chuck seat on the head side, which is used to limit the sliding cone. The end of the chuck claw is equipped with a return spring; the electromagnet on the centering device generates a magnetic field in the opposite direction through the current in the opposite direction. The thrust or suction is generated under the action of the permanent magnet, and the force is applied to the sliding truncated cone. Under the cooperation of the return spring, the extension and return of the chuck claws are realized, and the expansion and contraction of the centering device are completed. The centering device has the advantages of simple structure, convenient control and high degree of automation, which can realize rapid and automatic centering and improve efficiency.

Description

An electromagnetic claw centering device and its application method

technical field

The invention relates to an electromagnetic claw centering device and a using method thereof.

Background technique

At present, the centering device is generally composed of mechanical connections such as connecting plates, pressure rods, and positioning shafts. The expansion of the positioning part is generally realized by a contact-type lead screw and a return spring. This kind of centering device has relatively complex structure, slow speed, low efficiency, and inconvenient use, and the centering force is not easy to control, which easily causes deformation of the centered circular tube and affects the centering accuracy.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention discloses an electromagnetic jaw centering device and its application method. Under the action of an electromagnet, the device can quickly realize automatic centering, and feed the electromagnets in different directions and sizes. The current can realize two different working states of expansion and contraction of the centering device, with simple structure, fast speed and high efficiency. The invention adopts the electromagnet device to realize the non-contact control of the positioning body, with uniform force application and high centering precision.

To achieve the above object, the specific scheme of the present invention is as follows:

An electromagnetic claw centering device includes an electromagnet, a permanent magnet, a sliding truncated cone, a chuck claw, a chuck seat, a limiter and a return spring, the electromagnet is fixed on one side of the chuck seat, and the chuck There is a sliding truncated cone on the inner wall of the disc seat, and the permanent magnet is connected with the sliding truncated cone. The body is used to limit the sliding conical frustum, and the end of the chuck claw is provided with a return spring;

When in use, the electromagnet passes the current in the opposite direction to generate a magnetic field in the opposite direction. Under the action of the permanent magnet, a thrust or suction force is generated, and the force is applied to the sliding cone. With the cooperation of the return spring, the chuck claw is extended. and return to complete the expansion and contraction of the centering device.

Under the electromagnetic thrust of the electromagnet, the permanent magnet drives the sliding truncated cone inside the chuck seat to move forward, and the sliding truncated cone pushes out the three chuck claws until they are close to the inner wall of the circular tube to be centered, and the positioning is completed. heart operation.

The permanent magnet drives the sliding truncated cone inside the chuck base to move backward under the action of the electromagnetic attraction force of the electromagnet, and the chuck jaws return to their original positions under the action of the return spring.

Electromagnets pass currents in different directions to generate electromagnetic thrust or electromagnetic attraction.

The electromagnet is fed with currents of different current values to control the moving speed and applied force of the sliding truncated cone, thereby controlling the extending speed and applied force of the chuck claws.

The chuck claws on the chuck seat are ejected with the same ejection range when the sliding truncated cone moves forward, and automatically return to the original position under the action of the return spring when the sliding truncated cone moves backward.

A method of using an electromagnetic claw centering device, comprising:

When the electromagnet is fed with a positive current, the permanent magnet fixed on the sliding truncated cone pushes the sliding truncated cone under the repulsion of the electromagnet, and the sliding truncated cone moves forward, and the chuck jaws on the conical surface are pushed outward. , the current in the electromagnet increases, the thrust of the sliding conical frustum pushing the chuck claws increases, and the thrust exceeds the tension of the return spring, and the chuck claws protrude outward until they are close to the inner wall of the circular tube to be centered. Three The chuck claws are evenly distributed on the circumference, and the movement range is the same when pushed out by the sliding truncated cone. Under the force of the sliding truncated cone, the chuck claws move to the inner wall of the tube to be centered, and the centering is completed.

The electromagnet passes the current in the opposite direction to generate a magnetic field attracted by the permanent magnet. The permanent magnet drives the sliding cone truss inside the chuck seat to move backward under the action of the electromagnet, and the chuck claw returns to its original position under the action of the return spring. The centering device shrinks; the limit body is a sliding conical truncated limit, which provides protection for the centering device.

Beneficial effects of the present invention:

The application discloses a device for determining the center of a circular tubular object and a method for using the same. By passing forward current to the electromagnet, the permanent magnet pushes the sliding cone truss inside the chuck seat under the thrust of the electromagnet, and the sliding cone truss moves forward, and the sliding cone truss pushes the three chuck claws outward until It clings to the inner wall of the circular tube to be centered to complete the centering operation; after the centering is completed, the electromagnet is fed with a reverse current, the direction of the electromagnet magnetic field changes, and the permanent magnet drives the sliding cone inside the chuck seat under the electromagnetic attraction of the electromagnet. The table moves backward, and the chuck jaw returns to its original position under the action of the return spring.

Introduce the pair of electromagnet and permanent magnet, change the direction of the magnetic field by changing the direction of the electromagnet current, realize the non-contact control centering device, control the moving speed and the applied force of the sliding cone by changing the current flow value, so as to control the extension of the chuck claw The speed and the magnitude of the applied force; the centering device has a simple structure, is convenient to control, and has a high degree of automation, which can realize rapid and automatic centering.

Description of drawings

Fig. 1 is a structural diagram of the present invention;

Fig. 2 is a schematic sectional view of the present invention;

In the figure, 1. Electromagnet, 2. Permanent magnet, 3. Sliding cone, 4. Chuck claw, 5. Chuck seat, 6. Limiting body, 7. Return spring. the

Detailed ways:

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figure 1-2, an electromagnetic claw centering device, the electromagnet 1 is fixed on the side of the chuck seat 5, the permanent magnet 2 is connected with the sliding truncated cone 3, and there are three on the conical surface of the sliding truncated cone 3 The chuck claws 4 are evenly distributed around the circumference, and the chuck claws 4 protrude radially along the chuck seat 5. On the outer wall of the chuck seat 5, there is a return spring 7 at the end of the chuck claws 4, and they are connected to the chuck claws 4 Above, the lowest end of the inner wall of the chuck seat 5 is equipped with a limiter 6. When the electromagnet 1 is fed with a forward current, the permanent magnet 2 fixed on the sliding truncated cone 3 pushes the sliding truncated cone under the repulsion of the electromagnet 1. 3. The sliding truncated cone 3 moves forward, and the chuck claw 4 on the conical surface is pushed outward, the current in the electromagnet 1 increases, and the thrust of the sliding truncated cone 3 pushing the chuck claw 4 increases. When the thrust exceeds the pull force of the return spring 7, the three chuck jaws 4 are pushed out by the sliding cone 3 with the same movement range. Under the action of the pushing force of the sliding cone 3, the chuck jaws 4 move until they are close to the inner wall of the circular tube to be centered. , to complete the centering; the electromagnet 1 is fed with a current in the opposite direction to generate a magnetic field attracted by the permanent magnet 2. 4 returns to the original position under the action of the return spring 7, and the centering device shrinks; the limiting body 6 is the limit of the sliding cone 3, and provides protection for the centering device.

The electromagnet 1 on the centering device passes the current in the opposite direction to generate a magnetic field in the opposite direction, and generates thrust or suction under the action of the permanent magnet, which acts on the sliding truncated cone 3, and under the cooperation of the return spring 7, realizes The extension and return of the chuck claw 4 completes the expansion and contraction actions of the centering device.

The electromagnet 1 on the centering device passes currents in different directions to generate electromagnetic thrust or electromagnetic attraction, and controls the moving speed and applied force of the sliding cone 3 by passing currents of different current values, thereby controlling the chuck claw 4 The speed and force applied.

The three chuck claws 4 on the positioning device protrude at the same time when they are pushed by the sliding truncated cone 3, and automatically return to their original positions under the action of the return spring 7 when the force disappears; When moving forward, it is ejected and the ejection range is consistent.

The moving range of the sliding truncated cone 3 is limited by the limiting body 6, so as to prevent unpredictable consequences caused by movement beyond the range and ensure the normal operation of the centering device.

Working principle: The electromagnet 1 is fixed on the chuck seat 5 on one side of the centering device, and the permanent magnet 2 is connected with the sliding cone 3. When the electromagnet iron 1 is fed with a forward current, the permanent magnet 2 is pushed by the electromagnet 1, and the sliding cone 3 moves forward, and the thrust of the sliding cone 3 on the chuck seat 4 is greater than that of the return spring 7. During the pulling force of the chuck claw 4, the chuck claw 4 stretches out, and when the three chuck claws stretch out to be close to the tube wall of the round pipe to be centered simultaneously, the centering device expands to complete the centering operation. Feed the reverse current to the electromagnet 1, the permanent magnet 2 is attracted by the electromagnet 1, the permanent magnet 2 returns to the original position with the sliding truncated cone 3, and the chuck jaw 4 returns to the original position under the action of the return spring 7, The centering device retracts.

The present invention takes the electromagnet 1 as the core to realize rapid control of the centering device, simplifies the structure and realizes the centering function without affecting the centering accuracy, and has the advantages of simple control, convenient and fast operation, and high centering efficiency features.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (5)

1. An electromagnetic claw centering device, comprising an electromagnet, a permanent magnet, a sliding truncated cone, a chuck claw, a chuck seat, a limiter, a return spring, the electromagnet is fixed on one side of the chuck seat, and the chuck There is a sliding truncated cone on the inner wall of the disc seat, and the permanent magnet is connected with the sliding truncated cone. The body is used to limit the sliding conical frustum, and the end of the chuck claw is provided with a return spring; When in use, the electromagnet passes the current in the opposite direction to generate a magnetic field in the opposite direction. Under the action of the permanent magnet, a thrust or suction force is generated, and the force is applied to the sliding cone. With the cooperation of the return spring, the chuck claw is extended. and return to complete the expansion and contraction of the centering device. 2. An electromagnetic jaw centering device and its use method according to claim 1, wherein the electromagnet is fed with currents in different directions to generate electromagnetic thrust or electromagnetic attraction. 3. A kind of electromagnetic claw centering device and its use method as claimed in claim 1 or 2, it is characterized in that, the electromagnet passes through the electric current of different current values to control the moving speed and the applied force of the sliding truncated cone, thereby Control the speed and force applied by the chuck jaws. 4. An electromagnetic jaw centering device and its use method as claimed in claim 1, wherein the chuck jaws on the chuck base are pushed out and pushed out when the sliding frustum of the cone moves forward. The amplitude is consistent, and when the sliding truncated cone moves backward, it will automatically return to its original position under the action of the return spring. 5. The method of using the electromagnetic claw centering device according to claim 1, characterized in that: When the electromagnet is fed with a positive current, the permanent magnet fixed on the sliding truncated cone pushes the sliding truncated cone under the repulsion of the electromagnet, and the sliding truncated cone moves forward, and the chuck jaws on the conical surface are pushed outward. , the current in the electromagnet increases, the thrust of the sliding conical frustum pushing the chuck claws increases, and the thrust exceeds the tension of the return spring, and the chuck claws protrude outward until they are close to the inner wall of the circular tube to be centered. Three The chuck claws are evenly distributed around the circumference, and the movement range is the same when pushed out by the sliding truncated cone. Under the force of the sliding truncated cone, the chuck claws move to the inner wall of the tube to be centered, and the centering is completed; The electromagnet is fed with a current in the opposite direction to generate a magnetic field attracted by the permanent magnet. The permanent magnet drives the sliding cone inside the chuck seat to move backward under the action of the electromagnet, and the chuck jaw returns to its original position under the action of the return spring. The centering device shrinks; the limit body is a sliding conical truncated limit, which provides protection for the centering device.