JPH0243640Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a turntable for a machine tool, and relates to a technique for regulating the position of a steel plate on a turntable, and can be used for processing tables such as bender processing.

[Prior art] When rotating the processed material on the turntable,
Many steps were required to position the material on the turntable.

[Problems to be solved by the invention] When the material to be processed is large, such as a steel plate, it is dangerous for the worker to manually turn the material.
It's inefficient. Therefore, this invention attempts to restrict the material to a fixed position with respect to the turntable using a simple and unobtrusive structure.

[Means for Solving the Problems] In order to achieve the above objectives, this invention provides a table for supporting materials on the top of the base, and a rotating body rotatably mounted on the base. An electromagnet is provided so as to be movable up and down, and an electromagnet is provided so as to be freely retractable from a hole provided in the table in order to magnetically attach the material on the table, so that the material can be moved in front, back, right and left directions on the table, and in order to rotate the material.
A plurality of linear induction motors are provided around the hole to move the material in the front, rear, left and right directions.

[Operation] In the above configuration, when the electromagnet is excited while the material is placed on the table, the electromagnet rises to magnetically attach the material, protrudes from the hole in the table, and magnetically attaches the material. When the electromagnet is in a state where the material is magnetically attached, when the electromagnet is extinguished, the magnetic attachment is released, so the electromagnet descends under its own weight and sinks from the table.

As mentioned above, when the electromagnet is in a state where the material is magnetized, a plurality of linear induction motors provided around the hole generate a magnetic field in such a manner that the magnetic field moves in the same direction around the hole as a whole. The material is rotated in the same direction.
Moreover, by driving an appropriate linear induction motor in a state in which the magnetization of the material by the electromagnet is released, the material can be moved in the front-rear direction and the left-right direction.

[Example] In the illustrated example, the table 3 is provided in a rectangular shape when viewed from above, and is provided at a fixed position on a base 7. On the top surface of this table 3, a free bear 9 made of a ball that can freely rotate in any direction is arranged to protrude at an appropriate height, and supports the bottom surface of the material 1 such as a steel plate so that it can move freely. It is the composition.

Furthermore, linear induction motors 11, 13, 15, 17, and 19 for moving the material 1 supported on the free bear 9 by an induced magnetic field are arranged at front, rear, left, and right positions. The linear induction motors 11 and 15 are located at both left and right ends of the table 3 (upper and lower ends in FIG. 1) and are configured to generate a moving direction of a magnetic field in the front and back direction. The motors 13 and 17 are located at both the front and rear ends of the table 3 (the left and right ends in FIG. 1) and are configured to generate a horizontal magnetic field movement direction. Same motor 19
are located on both left and right sides of the front end (left end in FIG. 1) and are configured to generate a magnetic field in the front-rear direction. Each of these linear induction motors 1
By controlling the direction of the induced magnetic fields 1, 13, 15, 17, and 19, the material 1 supported on the free bear 9 can be moved forward, backward, leftward, rightward, clockwise, or counterclockwise. You can control the movement freely.

A hole 21 is provided in the center of the table 3 through which the electromagnet 5 can move up and down. A rotating body 23 rotatable about an axis in the vertical direction is provided on the base 7 below the hole 21 by means of a bearing 25. A lower guide portion 27 having an electromagnet 5 at its upper end is provided at the center of the rotating body 23 so as to rotate integrally and to be slidable only in the vertical direction. For example, it may be fitted in the form of a spline shaft. An electromagnetic coil 29 is provided above the electromagnet 5, and this electromagnetic coil 29
By energizing, the electromagnet 5 can be moved to the upper steel material 1 by electromagnetic attraction. A rotary pulse encoder 31 is provided at the center of the lower end of the rotating body 23, and can transmit a number of pulses according to the rotation angle to perform position detection, speed detection, etc.

In addition, as a form of fixing the material 1 to the base 7, the table 3, etc. so that it does not move, a configuration in which the rotating body 23 can be fixed to the base 7 may be used. Also, this rotating body 23
In order to change the direction of the material 1 by controlling the rotation, a rotary drive motor such as a servo motor may be provided in place of the pulse encoder 31.

A stopper 33 is provided in front of the table 3 and can be adjusted to move back and forth with respect to the table 3, so that the front end position of the material 1 fed from the top surface of the table 3 can be determined. Also, from the top and bottom, the surface plate 35,
37 is controlled to move up and down, and the upper and lower surfaces of the material 1 can be clamped and fixed between the surface plates 35 and 37. A bending plate 3 that is controlled to rise and fall along the front side of the lower catch 37
9 is provided, and by raising this bending plate 39,
The material 1 clamped and fixed between the surface plates 35 and 37 can be bent and formed.

The process of placing the steel plate material 1 as shown in FIG. 4 on the table 3 and forming the box 41 will be illustrated. Press the front side 43 of the material 1 against the stopper 33, and then press the electromagnetic coil 2.
When electricity is applied to 9, the electromagnet 5 is electromagnetically attracted to the lower surface of the material 1, and the movement of the center portion of the material 1 is restricted. Here, the surface plates 35 and 37 move from above and below to clamp the bending position of the material 1, and as the bending plate 39 rises, the front side 43 is bent upward into a right angle shape. (Figure 5).

Next, this material 1 is rotated 180 degrees around the electromagnet 5 so as to change its front and rear directions. This rotation is
Linear induction motor 11, 13, 15,
By making the excitation direction of the material 17, etc. in a certain direction counterclockwise or clockwise around the electromagnet 5, the material 1 whose center portion is regulated by the electromagnet 5 is rotated. As the material 1 rotates, the pulse encoder 31 detects this rotation angle and stops the rotation by the linear induction motors 11, 13, 15, 17, etc. at exactly 180 degrees. In this state, the electromagnet 5 is temporarily released, and the linear induction motors 11, 15, 19, etc. are operated to move the material 1.
The material 1 is moved back and forth, and the linear induction motors 13 and 17 are operated to move the material 1 left and right to position it. In this way, the rear side 45 is brought into contact with the stopper 33, and the center of the material 1 is again attracted by the electromagnet 5, and then bent by the bending plate 39 in the same manner as described above.

In this way, by repeating the movement correction of the direction and position of the material 1 by the linear induction motor and the movement restriction of the material 1 by the electromagnet 5, the front and rear sides 43, 45, left and right sides 47,
49 etc. is bent and formed. As a result, a box 41 as shown in FIG. 8 is completed from the material 1 shown in FIG. 4 through the forming steps shown in FIGS. 5 to 7.

[Effect of the invention] As can be understood from the explanation of the embodiments above, the gist of the invention is as stated in the claims for registration of a utility model, and as is clear from the description, the invention For example, the electromagnet 5 that magnetically attaches the material 1 on the table 3 is supported so as to be vertically movable on a rotary body 23 rotatably provided on the base 7, and is freely retractable from a hole 21 provided in the table 3. It is something. Therefore, when turning the material 1, the center of rotation of the material 1 is magnetically attached to the electromagnet 5, and stable turning can be performed. Further, by recessing the electromagnet 5 from the table 3, the electromagnet 5 does not get in the way when the material 1 is moved.

Furthermore, according to the present invention, the hole 2 of the table 3
1 is surrounded by a linear induction motor 1 for moving the material 1 in the front-back and left-right directions.
1, 13, 15, and 17, it is easy to move the material 1 in the front, back, left, and right directions and to rotate the material 1 by changing the moving direction of the magnetic field of each linear induction motor. It is.

[Brief explanation of drawings]

The figures show one embodiment of this invention. Figure 1 is a plan view, Figure 2 is a side sectional view, Figure 3 is a partially enlarged side sectional view, and Figures 4 to 8 are processing steps. FIG. Explanation of the symbols representing the main parts of the drawing, 1...Material, 3...Table, 5...Electromagnet.

Claims (1)

[Scope of utility model registration request] On the top of the base 7, there is a table 3 that supports the material 1.
is provided, and the electromagnet 5 is provided on the rotating body 23 rotatably provided on the base 7 so as to be movable up and down,
An electromagnet 5 is provided in a hole 21 provided in the table 3 in order to magnetically attach the material 1 on the table 3, and an electromagnet 5 is provided so as to be freely retractable from the hole 21 provided in the table 3. A turntable characterized in that a plurality of linear induction motors 11, 13, 15, 17 are provided around the hole 21 for movement in the front, rear, left and right directions.