JPH05228766A - Method and device for providing combined stop of machine force and magnetically attractive force for chuck - Google Patents

Abstract

PURPOSE: To enhance the accuracy of machining a workpiece by using both a kind of mechanical force and magnetic attraction force so as to reduce the frequency of removal of the workpiece in order to reduce the number of machining processes, and firmly clamp the workpiece. CONSTITUTION: Electromagnetically attracting plates are provided on the surfaces of a stationary jaw 102 and a movable clamping jaw 103 in a chuck adapted to make contact with a workpiece, so as to incorporate both mechanically clamping function and magnetically attracting function which can be used, simultaneously, or independently of each other, by controlling the degree of magnetic attraction forces of the electromagnetically attracting plate. For example, chucking is made by the mechanical force so as to effect a downward attracting force and a clamping force between both sides in order to prevent the workpiece from floating up. Further, the degree of deformation of the workpiece before and during machining is corrected for by controlling and adjusting the degree of magnetic attraction force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite stopping device for chucking mechanical force and magnetic attraction force.

[0002]

2. Description of the Related Art Generally, in order to machine a work piece, it is necessary to fix the work piece. Therefore, various types of anti-clamping tools are constructed and used. Generally, a work piece is held by a mechanical force or a magnetic attraction force, and the mechanical force hold method includes the following structures.

A drive unit such as a screw rod, a cam, or a rod that drives a gripping plate to hold the work piece.

A device that drives a sandwich plate by a fluid pressure source such as a motor or an automatic power pump.

The anti-squeezing method of magnetic attraction force includes the following.

An electromagnetic coil that adsorbs a magnetically conductive workpiece.

Permanent magnet iron that attracts magnetically conductive workpieces.

[0008]

The above mechanical force driven chuck generally deforms the work piece, so it is usually applied to roughing and finishing. Under special structural conditions, it is also used for precision processing. In general, electromagnetic attraction has a large attracting surface and the work piece receives a force on average, and because of this, the deformation of the shape is relatively small. It is applied to processing. However, the smaller the number of times the work piece is removed during the machining process, the more the number of steps can be saved, and relatively good precision can be obtained.

[0009]

SUMMARY OF THE INVENTION A composite stopping method of a mechanical force for a chuck and a magnetic attraction force according to the present invention is provided with an electromagnetic attraction plate on the surface of the chuck which comes into contact with a workpiece, and the mechanical force is applied to the chuck. It has a function of gripping and magnetic attraction, both of which can be used simultaneously or independently by the operation of the control device, and the magnitude of the magnetic attraction force of the electromagnetic attraction plate can be controlled.

The present invention is a composite chucking device having a combined function of preventing mechanical force from being held and magnetic attraction, and can provide the following functions to a workpiece by means of mechanical force and magnetic attraction. ..

1) Driving chucking of mechanical force or fixing of a workpiece by magnetic attraction can be selected.

2) First, mechanical processing is performed by chucking with mechanical force, and then the work is machined in place of magnetic attraction.

3) At the same time, magnetic attraction and mechanical force chucking are performed on the workpiece to prevent the floating deformation of the workpiece and subsequently reduce mechanical chucking during precision machining. , Remove and keep only magnetic adsorption,
Precision processing can be performed.

4) The work piece which is easily deformed is first attracted by magnetic force and then chucked by mechanical force,
Prevents lifting of the work piece by generating downward suction force and clamping force on both sides.

5) It is possible to control the magnitude of the magnetic attraction force,
The amount of deformation of the work piece is corrected before or during processing by controlling and adjusting the magnitude of the magnetic attraction force.

6) A device capable of performing manual control or automatic control by connecting with an electric control interface device, and performing the operations 1) to 5) in response to an electric control command in the automatic control.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a composite stopping device for mechanical force and magnetic attraction force in a chuck of the present invention will be described in detail below with reference to the accompanying drawings. The main configuration of the one shown in FIGS. 1 to 4 is as follows.

The main body 101 is fixed to a workbench and supports a work piece. At least one fixed jaw and at least one movable holding jaw can be installed in the main body 101. A permanent magnetic iron plate 108 that can be controlled or an electromagnetic coil that can be energized from the outside,
It is provided with a gap charging object 109 and an attraction surface of an object to be processed which is composed of electromagnetic poles and has a magnetic attraction function.

One or more fixed jaws 102 are mounted on the body and can be formed integrally with the body or removable from the body.

One or more movable gripping jaws 103 are engaged with the body to move the gripping jaws 103 relative to the fixed jaws to provide anti-clasping and release.

The movable holding jaw driving mechanism is composed of a driving screw rod 105, a screw rod support 106, and related members such as bearings, and the holding jaw driving mechanism is also hydraulic or atmospheric pressure. , Which can be rotationally driven by a motor, and which drives a fluid power cylinder to press a movable jaw and a fixed jaw to perform gripping and release of a work piece, a motor or a fluid drive device. The control valve can be clamped by a control switch, and can be connected to an electric control interface device to receive electric control commands.

The magnetic attraction function control device 107 is composed of an operation arm for providing an attraction function to the permanent magnet magnetic iron plate provided in the main body, and the permanent magnet type magnetic iron plate is machined by changing the gap or the divided flow rate of the magnetic force lines. This is to control the magnitude of the suction force that is applied to the object. In the energized excitation type of the magnetic coil, the switch unit adsorbs or releases the work piece, and this switch unit can be configured as a manual operation switch. The coil-excited magnetic iron plate can change the magnitude of the magnetic attraction force by controlling the excitation current or switching of the winding.

In the compound stop device of the present invention, the structure can be combined in a large number, and FIG. 5 is a perspective view of an application example in which the compound stop device is combined in a vertical multi-sided manner. It has been applied to the machining equipment for rotating worktables. FIG. 6 is a perspective view of an application example of the planar plural combination structure. This combination structure is used for mass production processing, and the number of the combinations can be expanded as needed.

In addition to this, it can be applied to a chuck disc type structure, and mechanical force applied to the holding jaws can be provided with anti-grip and magnetic attraction force of the disc surface. It can be applied to other forms of structure.

The driving structure of the movable jaw and the main body may be integrally or fixedly connected, or may be a combination type structure. When the main body wants to use a flat magnetic attraction plate, the fixed jaw and the movable jaw are connected to each other. It can be configured to be removable at the same time.

Further, FIG. 8 shows a flat magnetic attraction plate having a screw hole or a T-shaped groove and an elastic chuck mixed therein, and its main constitution is as follows.

It consists of a set of permanent magnet iron plates and an electromagnetic attraction plate constructed by the method of exciting an electromagnetic coil, and a standard screw hole 802 for installing an auxiliary holding jaw on the electromagnetic attraction plate.
A T-shaped groove 803 is formed, and this structure can also be a multi-sided structure. FIG. 9 is a perspective view of an embodiment in which the device shown in FIG. 8 is formed into a multi-sided structure.

[0028]

As described above, the composite stopping method for the mechanical force and the magnetic attraction force in the chuck of the present invention and the apparatus therefor use a kind of mechanical force and magnetic attraction force in combination, so that the workpiece to be machined during machining is processed. It is possible to reduce the number of times of removal, to save the number of steps, to strongly hold the work piece, and to improve the working accuracy of the work piece.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a combined stopping device for mechanical force and magnetic attraction force for a chuck.

FIG. 2 is a vertical sectional front view of FIG.

FIG. 3 is a vertical sectional side view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is a perspective view of a vertical multi-sided combined structure of a combined stopping device for mechanical force and magnetic attraction force for a chuck.

FIG. 6 is a perspective view of a planar combination structure of a composite stopper for mechanical force and magnetic attraction force for chucking.

FIG. 7 is a perspective view of an embodiment in which a composite stopping device for mechanical force and magnetic attraction force for a chuck is applied to a chuck disk-shaped structure.

FIG. 8 is a perspective view showing a structure in which an elastic picking tool is mixed with a flat magnetic attraction plate having screw holes and T-shaped grooves.

9 is a perspective view showing a multi-sided structure of the apparatus of FIG.

[Explanation of symbols]

 101 chuck body 102 fixed jaw 103 movable holding jaw 105 driving screw rod 106 screw rod support 107 magnetic attraction function control device 108 permanent magnetic iron plate 109 gap filler 801 T-shaped groove 802 screw hole

Claims (8)

[Claims] 1. An electromagnetic attraction plate is provided on the surface of a chuck that comes into contact with a workpiece, and the chuck has a function of preventing mechanical force from being caught and a function of magnetic attraction, and both are used simultaneously or independently by the operation of a control device. A composite stopping method of a mechanical force for a chuck and a magnetic attraction force, which enables the magnitude of the magnetic attraction force of an electromagnetic attraction plate to be controlled. 2. A mechanism for preventing mechanical force from clinging to a screw rod, a cam,
The mechanical force for chucking and magnetic attraction force according to claim 1, wherein the magnetic attraction is performed by a rod or another drive unit, or by a fluid pressure source of a motor or an automatic pump, and magnetic attraction is performed by a power coil or a permanent magnet iron plate. Combined stopping method. 3. A chuck main body fixed to a workbench and supporting a workpiece is provided with a fixed jaw and a movable holding jaw, and a controllable permanent magnet iron plate or electromagnetic coil is provided inside the main body. And a gap filling material and an electromagnetic pole, the attraction surface of the workpiece having a magnetic attraction function is formed, and the fixed jaw can be formed integrally with the main body or can be detached from the main body, and a movable holding jaw can be provided. It is movably engaged with the main body and is arranged at a position facing the fixed jaw.The movable holding jaw drive mechanism is composed of a drive screw rod and a screw rod support.The holding jaw drive mechanism is hydraulic and atmospheric pressure. Alternatively, it can be driven by a motor, and the work piece can be held between the holding jaw and the fixed jaw, and the control valve of the drive mechanism is connected to a manual control switch or an automatic electric control device, and the magnetic adsorption function control device is operated from the operation arm. Or change the gap or Mechanical force for the chuck that can control the attraction force of the permanent magnet iron plate by changing the flow rate of the magnetic force lines, and can change the magnitude of the magnetic attraction force by controlling the electromagnetic current of the electromagnetic coil or switching the winding. Stop device with magnetic and magnetic attraction. 4. A composite stopper for mechanical force and magnetic attraction force for a chuck according to claim 3, comprising a chuck disc-shaped structure having a holding jaw for preventing mechanical force from being held and a disc surface for magnetic attraction. apparatus. 5. The drive structure and the main body are integrally structured,
Alternatively, the combined mechanical force and magnetic attraction force for the chuck according to claim 3 or 4, wherein the fixed jaw and the holding jaw can be detached from the chuck body when the flat magnetic attraction plate is used in a combined structure. Stop device. 6. A standard screw hole or T-shaped groove for setting an auxiliary jaw is formed on an electromagnetic attraction plate composed of permanent magnet iron or an electromagnetic coil, and an elastic chuck is installed in the screw hole or T-shaped groove. 4. The combined mechanical force and magnetic attraction force stopping device for a chuck according to claim 3, wherein the elastic combination chuck comprises a holding jaw, an elastic combination holding plate, and an elastic combination pressing plate. 7. The composite stopping device for mechanical force and magnetic attraction force for a chuck according to claim 3, which has a structure in which a large number of them are combined horizontally or vertically or mixed. 8. A permanent magnet iron or current coil can be controlled by changing a gap or a flow rate of a magnetic force line by a magnetic attraction function control device to change the magnitude of an attraction force of a workpiece,
The composite stopping device for mechanical force and magnetic attraction force for a chuck according to claim 3, wherein the magnitude of the magnetic attraction force is changed by controlling the intense magnetic current in the electromagnetic coil and switching the winding.