JP2002001608A - Shearing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shearing machine capable of automatically changing the rake angle and the stroke amount to the optimum state according to a workpiece. SOLUTION: In this shearing machine 1 for shearing the workpiece W in cooperation of an upper blade 13 provided on the lower end of a vertically movable ram 11 and a lower blade 9 provided on the lower end of a workpiece table 7, ram elevating means 21L and 21R are provided for supporting the vicinities of right and left ends of the ram 11 and vertically moving the ram 11, a rake angle determining part 35 is provided for determining the angle of the upper blade according to the board thickness and material quality of the workpiece, and a driving control part 47 is provided for computing the stroke amount of the ram individually for the right and left sides according to the determined rake angle and the cutting length, and individually controlling the respective right and left ram elevating means according to the computing result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing machine, and more particularly to a shearing machine capable of changing a rake angle and a stroke amount to perform an optimum shearing process according to a workpiece.

[0002]

2. Description of the Related Art The rake angle of a conventional mechanical shearing machine is constant in one shearing machine, and the rake angle is different for each shearing machine due to the difference in cutting ability. For example, a large rake angle is used for cutting a thick plate, and a small rake angle is used for cutting a thin plate. Also, the stroke amount was constant in one shearing machine.

[0003] The rake angle of a conventional hydraulic shearing machine is provided to be arbitrarily set by providing a plurality of cylinders in one shearing machine and controlling the position of an upper blade by each cylinder.

Similarly, the stroke amount is provided to be arbitrarily set by controlling the stroke of the upper blade by each of a plurality of cylinders in one shearing machine.

[0005]

By the way, in the conventional mechanical shearing machine, since the rake angle is constant in one shearing machine, when the work having various thicknesses is sheared, the work is warped or twisted. There was a problem that it easily occurred. For example, when a thin plate is sheared by a shearing machine for cutting a thick plate, warping and twisting tend to increase due to a large rake angle. Similarly, when a thin plate is sheared by a shearing machine for cutting a thick plate, an unnecessary stroke amount also occurs.

In a conventional hydraulic shearing machine, the rake angle, stroke amount, and the like can be set arbitrarily. However, hydraulic oil is used to drive the upper blade, and in order to prevent malfunction of hydraulic equipment and deterioration of hydraulic oil. Is difficult to maintain because it requires periodic replacement of the hydraulic oil,
And there is a problem of waste oil treatment.

In addition, there is a problem that the number of parts such as a hydraulic piping system is large, and it is necessary to check for oil leaks.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a mechanical shearing machine that can automatically change a rake angle and a stroke amount to an optimum state according to a work. To provide.

[0009]

According to a first aspect of the present invention, there is provided a shearing machine having an upper blade provided at a lower end of a vertically movable ram and a rear end provided at a rear end of a work table. In a shearing machine for shearing a work in cooperation with a lower blade, a ram elevating means for supporting near the left and right ends of the ram and raising and lowering the ram is provided, and various types of work such as plate thickness, material, and cutting length are provided. A data input unit for inputting conditions, a rake angle determining unit for determining the rake angle of the upper blade according to the thickness and material of the work, and a rake angle determining unit for determining the rake angle and cutting length It is characterized in that a drive control unit is provided for calculating the stroke amount of the ram individually for the left and right, and for individually controlling the left and right ram elevating means based on the calculated amount.

Therefore, the angle of the upper blade is determined by the rake angle determining unit according to the thickness and material of the work input from the data input unit. The stroke amount of the ram is calculated separately for the left and right sides according to the determined rake angle and cutting length. Since the calculated left and right stroke amounts of the ram are arbitrarily adjusted by the respective ram elevating means provided on the left and right sides of the ram, the rake angle can be freely adjusted, and the left and right ram elevating and lowering movements can be adjusted. The means are automatically and individually controlled by the drive control unit based on the shearing position of the work so as to have the optimum rake angle according to the thickness of the work, and ascend and descend with the same stroke amount on the left and right. Since cutting can be performed with the optimum rake angle and the minimum ram stroke amount even for thick plates, accuracy and efficiency are high.

According to a second aspect of the present invention, there is provided a shearing machine comprising: an upper blade provided at a lower end of a vertically movable ram;
In a shearing machine for shearing a work in cooperation with a lower blade provided at a rear end of a work table, a ram elevating drive means for supporting near the left and right ends of the ram and moving the ram up and down is provided. A data input unit for inputting a cutting position and a cutting length of the work, a tilt direction selecting unit for selecting whether the rake angle is right or left according to the cutting position, and a tilt direction of the selected rake angle. A drive control unit for individually calculating left and right ram elevating means based on the calculated stroke amount of the ram in accordance with the cutting length is provided.

Therefore, the inclination direction selection unit selects whether the rake angle is rightward or leftward in accordance with the workpiece cutting position input from the data input unit. The stroke amount of the ram is calculated separately for the left and right sides according to the selected inclination direction of the rake angle and the cutting length. The left and right ram elevating means are individually controlled based on the calculated ram stroke amount, and the left and right stroke amounts are collectively controlled by the ram elevating means provided on the left and right sides of the ram. The rake angle can be arbitrarily adjusted, and the rake angle can be machined with a minimum ram stroke determined by the rake angle and the cutting length, thereby achieving both accuracy and efficiency. Furthermore, since the inclination direction of the rake angle can be changed as appropriate, regardless of the position of the work placed in the left and right direction, the cutting blade can be used evenly left and right, and the frequency of replacement due to wear of the cutting blade can be reduced. it can. The work in which the right and left ram lifting / lowering means are sheared by the drive control unit based on the shearing position of the work is the optimum rake angle and the stroke amount of the stroke amount according to each thickness from a thin plate to a thick plate. Is automatically cut.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a shearing machine according to the present invention will be described with reference to the drawings.

Referring to FIGS. 1 to 3, a main frame of a shearing machine 1 according to the present embodiment includes left and right side frames 5, a front plate and a lower frame whose left and right ends are supported by these side frames. Consists of three. A lower blade 9 is attached to a rear end (to the right in FIG. 1) of the work table 7 provided on the lower frame 3, and an upper blade 13 provided at a lower end of the ram 11 is provided above the lower blade 9. Is provided.

A nut member 15 rotatably provided on a frame is provided above the left and right ends of the ram 11 in the longitudinal direction.
The nut member 15 is screwed with a ball screw 17 extending vertically. The nut member 15 is connected via a transmission mechanism 19 such as a pulley or a belt to a ram lifting / lowering drive means comprising a variable speed electric motor such as a servomotor 21L, 21R. Further, the ball screw 17 is provided on a connecting member 23 fixed to the ram so as to be rotatable and immovable up and down. The frame 5
A control device 25 is provided at the upper part of.

By driving the servo motors 21L and 21R to rotate the nut member 15 via the transmission mechanism 19, the ball screw 17 is moved up and down, and
Will be moved up and down. The raising and lowering means can be controlled independently on the left and right, so that the rake angle θ can be freely changed, and the stroke amount of the ram at the time of cutting processing can also be freely changed. As shown in FIG. 2, on the left and right sides of the work table 7, side cages 31L and 31R for positioning the work W in the left and right direction are provided.
One of the side gauges is used.

Referring to FIG. 4, data input for inputting work processing conditions such as plate thickness, material, cut length, cut position and side cage collision detection data of the work W to the control device 25 are performed. A rake angle determining unit 35 for determining a rake angle θ based on the plate thickness and material data input to the data input unit 33; J 31L, 31R
An inclination direction selection unit 37 for selecting the inclination direction of the ram 11 from the collision detection data input; CPU 39 for calculating the left and right stroke amounts S based on the cutting length input from the data input unit 33
A database 41 for storing various data including a database for determining the rake angle and machine parameters necessary for determining the stroke amount;
Left and right stroke amounts / memory 43L, 4L for storing the left and right stroke amounts S calculated by the CPU 39.
The drive control unit 47 includes the 3R and the servo amplifiers 45L and 45R.

According to the above configuration, when actually driven, the thickness of the work W input from the data input unit 33,
The angle of the upper blade 13 is determined by the rake angle determination unit 35 according to the material. The stroke amount of the ram 11 is calculated separately for the left and right sides according to the determined rake angle and cutting length. The calculated left and right stroke amounts of the ram 11 are equal to servo motors 2 serving as ram elevating means provided on the left and right of the ram 11.
1L and 21R, the rake angle can be adjusted freely and arbitrarily. The left and right servo motors 21L and 21R are driven by the drive control unit 47 on the basis of the shearing position of the work W. The workpiece is automatically and individually controlled so as to have an optimum rake angle according to the thickness and moves up and down by the same stroke amount on the left and right, so that the workpiece is cut from a thin plate to a thick plate at an optimum rake angle.

In accordance with the cutting position of the work W input from the data input unit 33, the inclination direction selection unit 37 selects whether the rake angle is right or left. The stroke amount of the ram 11 is calculated separately for the left and right sides according to the selected inclination direction of the rake angle and the cutting length. This calculated ram 1
The respective servo motors 21L and 21R, which are left and right ram elevating means, are individually controlled by the drive control unit 47 based on one stroke amount, and the left and right stroke amounts are controlled by the respective ram elevating means provided on the left and right sides of the ram 11. Since the rake angle can be adjusted arbitrarily, the rake angle can be adjusted arbitrarily and the left and right servo motors 21L and 21R are sheared by the drive control unit 47 based on the shearing position of the workpiece W. Is automatically cut under optimum shearing conditions of rake angle and stroke amount according to each thickness from thin plate to thick plate.

The servo motors 21L and 21R are provided with encoders 49L and 49R, respectively. The encoders 49L and 49R are electrically connected to the servo amplifiers 45L and 45R of the drive controller 47. The actual rake angle θ and the stroke amount S are detected by the encoders 45L and 45R.

The operation of the above construction will be described with reference to the flowchart shown in FIG. 5. Workpiece work such as the thickness, material, shearing position and cutting length of the work W to be sheared is described. The condition is set in advance in the data input unit 33 of the control device 25.
(Step S1).

The input data input to the data input section 33 is temporarily stored in the database 41 of the drive control section 47. The rake angle θ is determined by the rake angle determination unit 35 based on the plate thickness and the material stored in the database 41 (step S2).

Based on the determined rake angle θ, the inclination direction selector 37 selects whether the rake angle is right or left (step S3). For example, as shown in FIG. 6A, the left end of the work W is abutted against the side cage 31L against the left end, and the left inclination angle of the ram 11, for example, is shown in FIG.
As shown in FIG.
And the right inclination angle of the ram 11 is selected.

The rake angle θ determined by the rake angle determination unit 35 and the inclination direction selected by the inclination direction selection unit 37 are input to the CPU 39, and the left and right stroke amounts S of the ram 11 are calculated. Is performed (step S4). For example, as shown in FIGS. 7 (A) and 7 (B), the stroke amount S of the ram 11 is calculated differently depending on whether the cutting length is short or long. In addition, for example, FIG.
As shown in (D), the stroke amount S of the ram 11 is calculated differently depending on whether the rake angle θ is shallow or deep.

The rake angle θ obtained by the rake angle determination unit 35 is converted into the rotation angles of the left and right servo motors 21L and 21R (step S5). Thereafter, a rotation command is individually output to each of the left and right servo motors 21L and 21R (step S6).

The left and right servo motors 21L and 21R are individually driven to rotate (step S7), the left and right servo motors 21L and 21R are simultaneously rotated, and the ball screw 17 is moved up and down. The ram 11 provided with the blade 13 moves up and down toward the lower blade 9 to cut the work W and stop (steps S8 to S9).

As described above, the work W has the optimum rake angle θ and the stroke amount S according to each thickness from a thin plate to a thick plate.
Cutting can be performed automatically under the following shearing conditions.

In the above-described embodiment, the mechanism for adjusting the rake angle θ and the stroke amount S is based on the amount of movement of the ball screw 17.
Another mechanism such as the cam mechanism 53 may be used.

Referring to FIG. 8, a toggle mechanism 51 including two interlocking rods 57 is connected to the upper end near the left and right ends of the ram 11 and the frame 5 in the upper part of the shearing machine body 3. The front end of the operating rod 61 is connected to the rear end connecting shaft 59, and the rear end of the operating rod 61 is provided at a position eccentric from the axis of the driven gear 63 that is supported on the upper part of the shearing machine body 3. It is connected to an eccentric drive shaft 65. The driven gear 63 is driven to rotate by a ram lifting / lowering drive means such as a servomotor 19R via a drive gear 67.

Therefore, when the driven gear 63 is rotated by the servomotor 19R, the amount of eccentricity L of the eccentric drive shaft 65 is reduced.
Is changed, and the position shown in FIG. 8 has the maximum amount of eccentricity.
The stroke amount S of the ram 11 is adjusted by adjusting the eccentric amount L. Since the height of the ram 11 is changed by changing the eccentric position of the eccentric drive shaft 65 of the toggle mechanism 51 near the left and right ends of the ram 11, the rake angle θ is freely adjusted. After the rake angle θ is adjusted, the driven blade 67 is rotated once to move the upper blade 13 provided on the ram 11 toward the lower blade 9 by a stroke amount S at an appropriate rake angle θ and work. W is cut.

Referring to FIG. 9, the cam mechanism 53 includes a cam follower 69 at the upper end near the left and right ends of the ram 11.
The cam 71 is supported on the upper part of the shearing machine body 3 so that the cam follower 69 is driven. The cam 71 is rotatably provided by a ram elevating drive unit such as a servo motor 19R.

Therefore, the stroke amount S of the ram 11 in FIG. 9 is equal to the length of ba. The stroke amount S is changed by rotating the cam 71 by the servo motor 19R, and the stroke amount S of the ram 11 is adjusted. Further, since the height of the ram 11 is changed by changing the position of the cam 71 of the cam mechanism 53 near the left and right ends of the ram 11, the rake angle θ is freely adjusted. After the rake angle θ is adjusted, the upper blade 13 provided on the ram 11 is raised and lowered by the stroke amount S at an appropriate rake angle θ toward the lower blade 9 by rotating the cam 71 one turn. Is cut.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0034]

As can be understood from the above embodiments of the present invention, according to the first aspect of the present invention, the rake according to the plate thickness and material of the work input from the data input unit. The angle of the upper blade is determined by the angle determining unit. The stroke amount of the ram is calculated separately for the left and right sides according to the determined rake angle and cutting length. Since the calculated left and right stroke amounts of the ram are arbitrarily adjusted by the ram elevating means provided on the left and right sides of the ram, the rake angle can be freely adjusted. Each ram lifting / lowering means is automatically and individually controlled by the drive control unit based on the shearing position of the work so as to have an optimum rake angle according to the thickness of the work, and moves up and down by the same left and right stroke amount. The workpiece can be cut from a thin plate to a thick plate at the optimum rake angle.

According to the second aspect of the present invention, the inclination direction selection unit selects whether the rake angle is right or left in accordance with the workpiece cutting position input from the data input unit. The stroke amount of the ram is calculated separately for the left and right sides according to the selected inclination direction of the rake angle and the cutting length. The left and right ram elevating means are individually controlled based on the calculated ram stroke amount, and the left and right stroke amounts are arbitrarily adjusted by the ram elevating means provided on the left and right sides of the ram. The rake angle can be arbitrarily adjusted freely, and each of the left and right ram lifting / lowering means is sheared by the drive control unit based on the shearing position of the workpiece. The cutting process can be automatically performed under the shearing conditions of the optimum rake angle and stroke amount according to the thickness.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a front view of a shearing machine.

FIG. 2, showing an embodiment of the present invention, is a plan view of a shearing machine.

FIG. 3, showing an embodiment of the present invention, is a right side view of the shearing machine.

FIG. 4 is a control block diagram showing an embodiment of the present invention.

FIG. 5 shows an embodiment of the present invention and is a control processing flowchart.

FIGS. 6A and 6B are explanatory diagrams for selecting a tilt angle of a ram.

FIGS. 7A to 7D are explanatory diagrams for calculating a stroke of a ram.

FIG. 8 shows another embodiment of the present invention, and is a schematic view of a toggle mechanism.

FIG. 9 shows another embodiment of the present invention, and is a schematic view of a cam mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shearing machine 9 Lower blade 11 Ram 13 Upper blade 17 Ball screw 21L, 21R Servo motor (ram elevating drive means) 31L, 31R Side gage 33 Data input unit 35 Rake angle determination unit 37 Inclination direction selection unit 39 CPU 41 Data base 47 Drive control unit 49L, 49R Encoder θ Rake angle S Stroke amount

Claims (2)

[Claims] 1. A shearing machine for shearing a work in cooperation with an upper blade provided at a lower end of a vertically movable ram and a lower blade provided at a rear end of a work table.
A ram elevating means for supporting the vicinity of the left and right ends of the ram and moving the ram up and down is provided, a data input section for inputting various conditions of the work such as a plate thickness, a material, and a cutting length; and a plate thickness and a material of the work. A rake angle determining unit that determines the rake angle of the upper blade according to the rake angle, and calculates the stroke amount of the ram separately on the left and right according to the determined rake angle and cutting length, And a drive control unit for individually controlling each of the ram elevating means. 2. A shearing machine for shearing a work in cooperation with an upper blade provided at a lower end of a vertically movable ram and a lower blade provided at a rear end of a work table.
A ram lifting / lowering means for supporting the vicinity of the left and right ends of the ram and moving the ram up and down is provided, a data input section for inputting a cutting position and a cutting length of the work on the work table, and a rake angle according to the cutting position. Direction selection unit for selecting whether to tilt right or left, and calculates the stroke amount of the ram separately according to the selected rake angle tilt direction and cutting length, and based on this, the right and left ram elevating means A shearing machine characterized by having a drive control section for individually controlling the shearing.