JP2014113650A - Nibbler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nibbler which can suppress rattling of a work-piece while smoothly cutting a metal having a slope.SOLUTION: A nibbler 50 is equipped with a punch 20, a case 30 which is cylindrically formed and receives the punch 20, and a die 10. An inclined surface 31S, which is gradually inclined in a direction along which the surface is separated from the die 10, with advancement of the surface to the front side in a direction of travel, is formed on a front side portion of the case 30 in the direction of travel at the die 10 side end part, a flat surface 31F parallel to a plane facing the punch 20 is formed on a rear side portion of the case 30 in the direction of travel at the die 10 side ent part. The flat surface 31F of the case 30 and the facing surface 10F of the die 10 face each other, whereby an interposed part 55 is formed.

Description

  The present invention relates to nibbler technology.

  Nibra is a cutting method in which a metal sheet or the like is interposed between a support cylinder (case) and a fixed blade (die), and the inserted metal sheet or the like is continuously punched out with a blade column (punch). It is a tool. As a general nibbler, an electric nibbler that an operator holds in his / her hand is well known. On the other hand, in recent years, an attempt has been made to punch a steel plate constituting a vehicle body by causing an industrial robot to hold a nibler in a vehicle body processing apparatus of an automobile factory.

  For example, Patent Literature 1 discloses an electric nibbler. The nibler disclosed in Patent Literature 1 can smoothly cut a sloped metal plate (workpiece), for example, by forming a lower end side of a support cylinder (case) for storing a blade column (punch) in a conical shape. It is configured.

  However, like the nibbler disclosed in Patent Document 1, in the configuration in which the lower end side of the case housing the punch is formed in a conical shape, the support cylinder (case) and the metal plate ( If the distance between the fixed blade (die) located below the workpiece is wide, the workpiece cannot be interposed between the case and the die before and after the punch. Therefore, when the workpiece is largely fluctuated in the vertical direction around the cutting part due to the friction between the punch and the workpiece at the time of cutting, the dimensional accuracy is deteriorated or the noise at the time of cutting is increased. There is.

Japanese Utility Model Publication No.57-1051

  The problem to be solved by the present invention is to provide a nibble that can suppress fluttering of a workpiece while smoothly cutting a metal having a gradient.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, the die is formed in a substantially cylindrical shape, and a die hole is formed on the front side in the traveling direction, and the die can be reciprocated in a direction approaching and separating from the die. A punch that is inserted into the die hole when moved in the approaching direction, and a case that is formed in a cylindrical shape and stores the punch, and the cutting portion of the sheet-like workpiece is connected to the die and the punch A nibler that cuts the workpiece toward the advancing direction by continuously punching the workpiece by reciprocating the punch while moving the advancing in the advancing direction, wherein the advancing at the die side end of the case In the front part of the direction, an inclined surface that is inclined in a direction away from the die as it goes toward the front side in the traveling direction is formed. A flat surface parallel to the surface of the die facing the punch is formed on the rear portion of the traveling direction, and the flat surface of the case and the surface of the die facing each other face each other. Is formed.

  According to the nibbler of the present invention, flapping of a workpiece can be suppressed while smoothly cutting a sloped metal.

The schematic diagram which showed the structure of the processing apparatus. The schematic diagram which showed the structure of the punching apparatus. The side view which showed the structure of the nibra. The schematic diagram which showed the effect | action of the nibra. The side view which showed the lower end part of the case. The schematic diagram which looked at the AA cross section of FIG. 5 from the bottom.

The processing apparatus 1000 will be described with reference to FIG.
In addition, in FIG. 1, the processing apparatus 1000 is typically represented by the side view.

  The processing apparatus 1000 is an embodiment of a processing apparatus provided with a nibler according to the present invention. The processing apparatus 1000 is an apparatus that processes the workpiece W. The processing apparatus 1000 of this embodiment is installed in an automobile factory, and the workpiece W of this embodiment is a steel plate that constitutes the body of an automobile. The processing apparatus 1000 includes a drawing apparatus 100, a punching apparatus 200, and a bending apparatus 300.

  The drawing device 100 is a device for drawing the workpiece W. The drawing apparatus 100 includes a pair of molds, an upper mold 110 and a lower mold 120, and a press machine 130 to which the upper mold 110 and the lower mold 120 are attached. The drawing apparatus 100 draws the work W disposed between the upper mold 110 and the lower mold 120 by causing the upper mold 110 to approach the lower mold 120 by the press machine 130.

  In addition, although the drawing apparatus 100 of this embodiment is set as the structure by which a pair of metal mold | die (upper mold | type 110 and lower mold | type 120) was attached to the press machine 130, it is not limited to this. For example, it is good also as a structure (multistage press) in which several pairs of metal mold | dies are attached to a perpendicular direction.

  The punching device 200 is a device for punching the workpiece W that has been drawn by the drawing device 100. Details of the punching apparatus 200 will be described later.

  The bending apparatus 300 is an apparatus for bending the workpiece W that has been punched by the punching apparatus 200. The bending apparatus 300 includes a base 310, industrial robots 320 and 320, and rollers 330 and 330.

  The base 310 is used to place the workpiece W that has been punched by the punching apparatus 200. The roller 330 performs bending on the workpiece W by rolling on the workpiece W.

  With such a configuration, the processing apparatus 1000 performs the drawing process on the workpiece W by the drawing apparatus 100, performs the drawing process on the workpiece W that has been subjected to the drawing process by the punching apparatus 200, and performs the bending apparatus. By 300, the workpiece W that has been punched is bent.

  Conventionally, when processing the workpiece W, a press machine to which a plurality of pairs of dies having different uses is attached is used, and the workpiece W is pressed to perform predetermined processing. In this embodiment, after drawing the workpiece W by the drawing device 100, the workpiece W is sequentially formed by the punching device 200 and the bending device 300.

  Therefore, the load necessary for processing the workpiece W is dispersed per unit time, and the drawing device 100, the punching device 200, and the bending device 300 are configured to apply the necessary minimum load. be able to.

  In this manner, the drawing device 100, the punching device 200, and the bending device 300 can be reduced in size, and thus the processing device 1000 can be reduced in size. In other words, the space required for machining the workpiece W can be reduced. Moreover, since the tool attached to the industrial robot can be easily changed, it is possible to flexibly cope with the change of the type of the workpiece W or the like.

The punching apparatus 200 will be described with reference to FIG.
In FIG. 2, the punching device 200 is schematically shown in a side view.

  The punching apparatus 200 is an embodiment according to the nibler of the present invention. The punching device 200 is a device that punches the workpiece W. The punching apparatus 200 includes a nibler 50, a base 210, industrial robots 220 and 220, and a controller 250.

  The nibra 50 is a cutting tool that cuts the workpiece W by continuously punching it. The nibbler 50 of this embodiment is held by the industrial robot 220. The nibler 50 is connected to the controller 250. Details of the nibler 50 will be described later.

  The base 210 supports the workpiece W in the work space of the punching apparatus 200. The base 210 is disposed at a substantially central portion in the work space of the punching device 200.

  The industrial robot 220 moves the gripped nibler 50 freely within the work space of the punching apparatus 200. The industrial robot 220 is provided on each side of the base 210. The industrial robot 220 is connected to the controller 250.

  The controller 250 has a function of controlling a drive unit (not shown) of the industrial robot 220 and moving the industrial robot 220 to a work position. Further, the controller 250 has a function of controlling a motor 41 of a nibler 50 described later and operating the nibler 50 at a work position. The controller 250 is connected to the nibbler 50 and the industrial robot 220.

  The punching apparatus 200 of the present embodiment is configured to provide two industrial robots 220, but is not limited to this. The number of the industrial robots 220 can be appropriately set according to the cutting distance, cutting position, machining tact, etc. of the workpiece W. For example, four industrial robots 220 may be provided.

The configuration of the nibler 50 will be described with reference to FIG.
In FIG. 3, the nibler 50 is shown in a side view.

  Nibler 50 is an embodiment of the nibler of the present invention. The nibler 50 is a cutting tool that cuts the workpiece W along the traveling direction by continuously punching the workpiece W while traveling in a predetermined direction. The nibler 50 includes a die 10, a punch 20, a case 30, a support part 35, a drive part 40, and an interposition part 55.

  The die 10 is formed in a cylindrical shape, and a die hole 11, a discharge hole 12, and a facing surface 10F are formed. The die hole 11 is formed in the axial direction of the die 10 and is fitted with a support portion 35 described later.

  The discharge hole 12 is formed as a through-hole penetrating from the inner peripheral surface on the front side in the traveling direction of the die hole 11 to the outer surface on the front side in the traveling direction of the die 10. The discharge hole 12 is inclined so as to descend from the inner peripheral surface side of the die hole 11 toward the outer peripheral surface side of the die 10. When the workpiece W is cut by the nibler 50, the die 10 is disposed below the workpiece W, and the tip end portion of the punch 20 is inserted into the die hole 11 of the die 10.

  The facing surface 10 </ b> F is a top surface of the cylindrical die 10 and is a surface facing the case 30.

  The punch 20 moves up and down and punches the workpiece W. The punch 20 is accommodated in the case 30 so as to be slidable up and down. The punch 20 is formed with a support portion 21 formed in a cylindrical shape and a punch blade 22 which is a blade portion for punching the workpiece W.

  The support portion 21 is disposed above the punch blade 22 and is supported by a support portion 43 described later. The punch blade 22 is formed in a semi-cylindrical shape having a substantially hoof shape in cross-sectional view, and a blade tip is formed at the lower end. The lower end portion of the punch blade 22 is positioned below the upper end surface of the die 10 when the punch 20 moves downward (in the direction approaching the die 10), and is inserted into the die hole 11.

  The case 30 stores the punch 20. The case 30 is formed in a cylindrical shape and stores the punch 20. Here, the side close to the workpiece W of the case 30 is defined as a lower end 31.

  The support part 35 is formed in a substantially cylindrical shape. A punch 20 is fitted on the upper front side of the support portion 35. The upper part of the support part 35 penetrates into the case 30, and the outer peripheral surface on the rear side in the traveling direction is fixed to the inner peripheral surface of the case 30. In the case 30, a space having a shape corresponding to the shape of the punch blade 22 is formed between the support portion 35 and the front portion of the case 30, and the punch blade 22 can slide in this space. ing.

  Further, the lower portion of the support portion 35 is fitted in the die hole 11 of the die 10. Between the front part of the die hole 11 and the support part 35, a space having a shape matching the shape of the lower end part of the punch blade 22 is formed. This space is formed from the upper end of the die 10 to the middle part in the vertical direction, and communicates with the discharge hole 12.

  The drive unit 40 reciprocates the punch 20 in the vertical direction. The drive unit 40 includes a motor 41, a rod 42, and a support unit 43. The drive unit 40 converts the rotational drive of the motor 41 to the vertical drive of the support unit 43 via the rod 42. The support part 43 is formed in a cylindrical shape, and supports the support part 21 of the punch 20 by its lower end part. With this configuration, the punch 20 can be reciprocated in the direction of approaching and separating from the die 10 by the drive unit 40.

  The interposition part 55 is a part where the work W is interposed between the die 10 and the case 30. The interposition part 55 is formed by the flat surface 31F of the case 30 to be described later and the facing surface 10F of the die 10 facing each other.

The operation of the nibler 50 will be described with reference to FIG.
In FIG. 4, the nibler 50 is schematically shown in a side sectional view. FIG. 4 shows a stage where the nibler 50 punches the workpiece W in the order of FIGS. 4A, 4B, and 4C. 4A, 4B, and 4C are cross-sectional views viewed from below the workpiece W in each figure.

  As shown in FIG. 4, the nibler 50 is in a state where the cutting part of the work W is placed on the front side in the traveling direction on the die 10, that is, in a state where the cutting part of the work W is interposed in the interposition part 55. The workpiece W is cut by continuously punching the workpiece W in the traveling direction. At this time, the punch 20 is reciprocated in the vertical direction inside the case 30 by the drive unit 40.

  As shown in FIG. 4A, the punch 20 is moved downward from a state in which the punch blade 22 is positioned above the workpiece W.

  As shown in FIG. 4B, the punch blade 22 of the punch 20 that moves downward reaches below the workpiece W, punches a cut portion of the workpiece W, and is fitted into the discharge hole 12. At this time, the scrap of the workpiece W punched with the substantially hoof-shaped punch blade 22 in a cross-sectional view becomes a crescent moon shape in a plan view and falls into a space between the die 10 and the support portion 35 and is discharged. 12 is discharged.

  As shown in FIG. 4C, after punching out the workpiece W, the punch 20 is moved upward, and the punch blade 22 is pulled out from the discharge hole 12. Further, the nibler 50 advances in the direction of travel with respect to the workpiece W by the amount of punching of the workpiece W.

The configuration of the lower end portion 31 of the case 30 will be described with reference to FIGS. 5 and 6.
FIG. 5 shows the lower end portion 31 of the case 30 in a side view. FIG. 6 shows a cross-sectional view taken along the line AA in FIG.

  A lower end 31 that is an end of the case 30 on the die 10 side is formed of a first lower end 31A and a second lower end 31B. 31 A of 1st lower end parts are continuously formed below the main-body part formed in a cylindrical shape, and it is trapezoidal shape in a side view so that the external shape may taper downward. Is formed.

  The second lower end portion 31B is formed continuously below the first lower end portion 31A, and its outer shape is formed in a cylindrical shape. The second lower end portion 31B has an inclined surface 31S and a flat surface 31F. The inclined surface 31 </ b> S is formed as an inclined surface inclined obliquely downward toward the rear on the front side in the traveling direction of the nibler 50.

  In addition, since the punch blade 22 of the punch 20 is disposed so as to be positioned on the front side in the traveling direction in the case 30, the punch blade 22 protrudes from the inclined surface 31S when the punch 20 moves downward. When the punch 20 moves upward, the punch 20 is drawn into the case 30 from the inclined surface 31S.

  The flat surface 31F is formed rearward from the lower end of the inclined surface 31S, and is formed as a flat bottom surface parallel to the opposing surface 10F of the die 10 on the rear side in the traveling direction of the nibler 50. .

  In addition, although the flat surface 31F of this embodiment was set as the structure formed in the 2nd lower end part 31B in the whole area | region of the second half side of the advancing direction of the nibler 50, it is not limited to this. For example, the second lower end portion 31 </ b> B may be configured such that an inclined surface that is inclined obliquely forward is formed, and the flat surface 31 </ b> F is formed at a part of the rear half side in the traveling direction of the nibler 50.

  That is, as shown in FIG. 6, the flat surface 31 </ b> F is behind the punching blade 22 with respect to the traveling direction, and is a workpiece R like a region R lateral to the traveling direction with respect to the support portion 35. It suffices if it is formed in a range of a region partially overlapping with a portion remaining after cutting by the W punch 20.

The effect of the nibler 50 will be described.
Conventionally, in a nibler in which the lower end side of the case 30 is formed in a conical shape, the workpiece is violated by friction between the punch 20 and the workpiece W at the time of cutting, so that the dimensional accuracy is deteriorated, or noise at the time of cutting is increased. May occur.

  In the nibler 50 of the present embodiment, the flat surface 31F is formed as the interposition part 55 as a flat bottom surface on the rear side in the traveling direction of the nibler 50 of the case 30, so that the friction between the punch 20 and the workpiece W is caused during cutting. The workpiece W will not be violated (the workpiece W will not largely fluctuate in the vertical direction around the cut portion).

  In addition, since the inclined surface 31S is formed on the front side in the traveling direction of the nibler 50 of the case 30 as an inclined surface that is inclined obliquely downward toward the rear, the workpiece W having a gradient can be cut smoothly as in the conventional case.

DESCRIPTION OF SYMBOLS 10 Dice 11 Die hole 12 Discharge hole 20 Punch 30 Case 31 Lower end part 31F Flat surface 31S Inclined surface 50 Nibura 55 Interposition part

Claims (1)

A die formed in a substantially cylindrical shape and having a die hole formed on the front side in the traveling direction;
A punch that can be reciprocated in a direction approaching and separating from the die, and inserted into the die hole when moved in a direction approaching the die; and
A case formed in a cylindrical shape and storing the punch;
Comprising
A nibler that cuts the workpiece in the advancing direction by continuously punching the workpiece by reciprocating the punch while moving the die and the punch in the advancing direction at a cutting portion of the sheet-like workpiece Because
An inclined surface that is inclined in a direction away from the die as it goes toward the front side in the traveling direction is formed on the front side portion in the traveling direction at the die side end portion of the case,
A flat surface parallel to a surface facing the punch in the die is formed on the rear side portion in the traveling direction at the die side end portion of the case,
The interposition part is formed by the flat surface of the case and the facing surface of the die facing each other.
Nibra.

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