JP2709999B2 - Positioning device for member to be cut in shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for positioning a member to be cut in a shearing machine usually called a circle shear for cutting a rectangular metal plate into a circle.

[0002]

2. Description of the Related Art The above-mentioned shearing machine comprises a cutting blade provided at a fixed position and a supporting member which is located at a predetermined distance from the cutting blade and supports a center point of a member to be cut. And a structure is adopted in which the member to be cut is rotated and cut by the rotation of the rotary blade. Therefore, when cutting the member to be cut, the cutting radius is determined from the size of the cutting circle, the support member is moved to a distance corresponding to the radius with respect to the cutting blade, and the cutting circle is cut from one side of the member to be cut. It is necessary to determine the position of the edge of the member to be cut in the horizontal and vertical directions (hereinafter, the horizontal direction is referred to as X direction and the vertical direction is referred to as Y direction) with respect to the cutting blade. It is done by work.

[0003]

However, in this case, when a large number of pieces having the same size are to be cut, stoppers are provided in the X direction and the Y direction as positioning of the members to be supplied, respectively. Although the positioning operation is easy, there is a problem that a large number of troubles are required for the positioning when forming disks of various sizes of small lots and various types.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to automatically position the support member and the member to be cut by inputting the size of the member to be cut and the size of a cutting circle into a control mechanism. I do.

[0005]

According to a first aspect of the present invention, there is provided a positioning apparatus for a member to be cut which supports a center point of the member to be cut, and comprises a pair of upper and lower cutting blades at a predetermined radius position. In a shearing machine that rotates a member to be cut by the rotation of the cutting blade and cuts a required circular member, a receiving plate on which a member to be supplied to be placed is placed, and a transverse direction of the member to be supplied and a right angle to the same. A positioning member for determining the respective edge positions in the longitudinal direction of the cutting member and a supporting member for supporting the rotation center of the member to be cut, a driving mechanism for moving the supporting member back and forth with respect to the cutting blade, and a respective positioning member and driving And a control mechanism for controlling the mechanism, wherein the positioning member includes a protrusion for abutting and supporting the member to be cut, the protrusion protrudes when positioning the member to be cut with respect to the receiving plate, and shifts to a retracted position when cutting. The gist is that the control mechanism calculates the positions of the positioning members and the support members by inputting the length and width dimensions of the member to be cut and the dimensions of the cutting circle, and shifts the respective protruding parts and the support members to the calculated predetermined positions. It was done.

[0006]

[Operation] The dimensions of the member to be cut and the dimensions of the cutting circle are input to the control mechanism. Based on this, the control mechanism determines the center position of the circle and the horizontal direction and the vertical position of the member to be cut that support the member to be cut, and shifts the support member to the center position. At the same time, the horizontal and vertical positioning members are actuated to move the respective projections to predetermined positions.

[0007]

[Embodiment] The figure shows an embodiment of the present invention. The shearing machine 1 includes a cutting blade 2 and a support member 3 that supports a central portion of the workpiece W. The cutting blade 2 includes an upper blade 2a and a lower blade 2b, and the lower blade 2b is rotatably mounted at a fixed position.
The upper blade 2a is capable of swinging up and down, and both are rotated by a suitable driving means (not shown). The support member 3 is a cradle 4
And an upper holding rod 5, and the receiving stand 4 and the holding rod 5 are rotatably mounted above and below the tip of the support arm 6, respectively. The support arm 6 is supported by the cutting blade 2 so as to be able to move along a guide bar 7 to move forward and backward by a drive mechanism 8 with a change in the size of the member W to be cut. The drive mechanism 8 includes a screw tube 11 screwed to a screw rod 10 rotated by a drive motor 9, and the screw tube 11 is connected to the support arm 6.

Reference numeral 15 denotes a receiving plate for the member W to be cut, the tip of which is connected to a support frame 16 integrally attached to the support arm 6, and the insertion groove 1 of the member W to be cut formed in the support arm 6.
2 and extends toward the worker in front.

The device 20 for positioning the member to be cut with respect to the shearing machine 1 includes a drive mechanism 8 for the support arm 6.
A positioning member 21 provided in the left-right direction (horizontal direction, hereinafter referred to as X-axis direction) provided near the cutting blade 2; and a Y direction of the member W to be cut attached to the support frame 16, that is, a front-rear direction perpendicular to this Direction) of the positioning member 22 (hereinafter, the former is X
A shaft positioning member, the latter is referred to as a Y-axis positioning member), and a control mechanism 23 for controlling these members. A tachometer, for example, a pulse encoder 24, is connected to the screw rod 10 of the drive mechanism 8, and the amount of advance / retreat of the support arm 6, that is, the support member 3 with respect to the cutting blade 2 is fed back to the control mechanism 23.

The X-axis positioning member 21 includes a protrusion 25 provided in the vicinity of the cutting blade 2, an access cylinder 26 for moving the protrusion 25 in and out, and a movable cylinder mounted with the cylinder 26 and moved by the positioning cylinder 28. 27.
As the positioning cylinder 28, a so-called cell con cylinder having a built-in pulse encoder is used. Note that the protrusion 25
When the switch valve 29 is energized to the in / out cylinder 26, it projects to the support position of the member W to be cut, but when the energization is cut off, the protrusion 25 is raised to the retracted position. Reference numeral 30 denotes a switching valve for switching the pressure oil for the positioning cylinder 28.

The Y-axis positioning member 22 includes a sliding rod 40 slidably supported by the support frame 16, a drive motor 41 for the sliding rod 40, and a plurality of projections 42 attached to the sliding rod. Is provided. A screw 43 is attached to the drive motor 41,
A screw tube 44 is screwed to the screw rod 43, the sliding rod 40 is connected to the screw tube 44, and a tachometer such as a pulse encoder 4 for detecting the amount of movement of the screw tube 44 is connected to the screw rod 43.
5 is connected. Note that the projection 42 is provided with a switching valve 4 by a cylinder 46 in the same manner as the projection 25 of the X-axis positioning member 21.
When the power is supplied to the cutting member 7, the protrusion protrudes to the support position for the member W to be cut, but when the power is cut off, the protrusion 42 shifts to the lower retracted position. In the drawing, reference numeral 17 denotes a cutout groove formed on the receiving plate 15 of the member to be cut, for projecting the projection 42 upward.

In the above configuration, when cutting the workpiece W, as shown in FIG. 6, the length and width dimensions (usually formed into a square) A of the rectangular workpiece W and the circle B to be cut are determined. The radius R is input to the control mechanism 23. Control mechanism 2
Numeral 3 denotes a distance R to the support member 3 based on the cutting blade 2 in the arithmetic circuit 50, a distance a in the X-axis direction from the cutting circle B of the member to be cut W to the outer edge, and connects the cutting blade 2 to the support member 3. Determine the distance (R + a) in the Y-axis direction based on the line,
The numerical value is applied to the output circuit 51. Thus, the output circuit 51 drives the drive motor 9 so that the center position O of the cutting circle B where the support member 3 attached to the support arm should be formed, that is, the distance between the cutting blade 2 and the support member 3 becomes R. I do.
The transition distance at this time is fed back to the control mechanism 23 by the encoder 24.

At the same time, the output circuit 51 causes the positioning cylinder 28 to move the projection 25 of the X-axis positioning member 21 behind the cutting blade 2 (on the side opposite to the support member 3) to a distance equal to the length a. Activate and operate the access cylinder 26 to hold the projection 25 in a protruding state. At the same time, the motor 41 on the Y-axis positioning member 22 side is operated on the basis of the line connecting the cutting blade 2 and the support member 3 to move the sliding rod 40 to reach the distance (R + a) in the Y-axis direction. At this time, the protrusion 43 is held in a protruding state.

Thus, when the workpiece W is to be supplied, the X-axis and Y-axis positioning members 21 and 22 are respectively set at a predetermined processing position by the projections 25 and 43 of the positioning members 21 and 22. The center point O is supported by the support member 3. When the position setting is completed, each of the projections 25 and 42 moves to the retreat position so as not to hinder the rotation of the member to be cut.

[0015]

As described above, according to the present invention, by inputting the size of the supplied member to be cut and the size of the circle to be cut into the control mechanism, the control mechanism uses the cutting blade as a reference to cut the cutting circle. Is calculated, and the support member 3 is shifted to a predetermined rotation center position of the member to be cut, and the X-axis, that is, the projection 25 of the lateral positioning member 21 and the direction perpendicular thereto. Y-axis positioning member 22
Is moved to the calculated edge position of the cut member, so that the supplied vertical and horizontal surfaces of the cut member W can be reliably received at a predetermined position, and the predetermined rotation center position is gripped by the support member. You can do it. Moreover, since this positioning is performed by the control mechanism, even if the size of the member to be cut and the size of the cutting circle to be formed are changed, the numerical value is automatically input simply by inputting the numerical value to the control mechanism. It is possible to efficiently perform positioning and cutting of a member to be cut even in multi-product small-lot production.

[Brief description of the drawings]

FIG. 1 is an overall explanatory diagram of a positioning device in a shearing machine of the present invention.

FIG. 2 is an explanatory diagram of a support member driving procedure of the shearing machine.

FIG. 3 is a front view of the X-axis positioning member.

FIG. 4 is a front view of a Y-axis positioning member.

FIG. 5 is an operation circuit diagram of the positioning device.

FIG. 6 is a plan view of a member to be cut.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shearing machine 2 cutting blade 3 support member 20 positioning device 21 X-axis positioning member 22 Y-axis positioning member 23 control mechanism 25 X-axis positioning protrusion 42 Y-axis positioning protrusion W W member to be cut

Claims (1)

(57) [Claims] 1. A shearing machine that supports a center point of a member to be cut, and has a pair of upper and lower cutting blades at a predetermined radius position, and rotates the member to be cut by rotation of the blade to cut a required circular member. A receiving plate on which a supplied member to be cut is placed, a positioning member for determining the lateral edge position of the supplied member to be cut and a vertical edge perpendicular thereto, and a rotation center of the member to be cut And a drive mechanism for moving the support member back and forth with respect to the cutting blade, and a control mechanism for controlling the respective positioning members and the drive mechanisms, wherein the positioning members are projections for abuttingly supporting the members to be cut. When the member to be cut is positioned with respect to the receiving plate, the protrusion protrudes from the receiving plate, and when the member is cut, the protrusion moves to the retracted position. Components A position of the member to be cut in the shearing machine, wherein the position of the projecting member and the supporting member are calculated, and the respective protrusions and the supporting member are shifted to the calculated predetermined positions.