JP2007290019A - Vertical pushing type drawing machine line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawing machine line where a working machine performing drawing is not space-consuming by itself, and also, the change of a layout and the change of the number of drawing stages are facilitated. <P>SOLUTION: In the vertical forced type drawing machine line where a plurality of vertical presses are arranged, each vertical press comprises: a slider, while being guided by guide rods fixed to a bet plate and an upper plate, moving up and down in a press space with one hydraulic cylinder mounted on the upper plate; a rack having an internal space where a knockout plate is movable up and down; and the knockout plate arranged at the internal space, and the knockout plate uses a slider linkage system where it moves up and down linked with the movement of the slider. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drawing machine train that is suitably used for drawing parts such as a shaft for automobile steering, using pipes and rods as raw materials.

Conventionally, drawing of parts such as an automobile steering shaft is generally performed by a horizontal drawing machine row in which a plurality of rotary swaging machines and drawing machines are arranged. These dedicated drawing machines require a large installation space, and it is extremely difficult to change the number of drawing processes accompanying changes in the specifications of drawn parts.
For example, as shown in FIGS. 5 (a) and 5 (b), when drawing a part of a shaft for an automobile steering, if the shaft part length L is short, buckling does not occur in five steps. Drawing can be performed, but if the shaft part length L becomes longer due to a change in the specification of the drawn parts, buckling will occur in 5 steps, so the number of machining steps needs to be 6 steps.

However, since the horizontal type drawing processing machine itself takes up space, it may be difficult to change the number of processing steps from five to six.
As shown in FIG. 6, the horizontal drawing machine 16 includes a pressing hydraulic cylinder 11, a die set 12, and a knockout hydraulic cylinder 14, and the pressing hydraulic cylinder 11 performs the longitudinal direction of the workpiece W. The workpiece W is drawn by the die set 12 while applying a compressive force to the workpiece W. In FIG. 6, reference numeral 13 denotes a knockout pin for discharging the processed material W from the die set 12. On the gantry 16A, two hydraulic cylinders 11 and 14 and a die set 12 are mounted. A hydraulic unit 15 supplies pressure oil to the two hydraulic cylinders 11 and 14. In such a horizontal drawing machine 16, the pressing direction of the pressing hydraulic cylinder 11 is set to the horizontal direction, and the knockout hydraulic cylinder 14 needs to apply a knockout force from a direction opposite to the pressing direction. There is a drawback that the horizontal type drawing machine itself takes up space.

By the way, as a processing machine that performs a plurality of processing steps as a single unit, a transfer press in which a conveying device is incorporated in a vertical press, a multistage forging molding machine that can efficiently perform a molding operation, and the like are also known. (For example, patent document 1). The multistage forging machine described in Patent Document 1 includes a plurality of dies, a plurality of punches attached to a ram (also referred to as a slider), a knockout means for extruding a material forged by the die and the punch, and a material Material transfer means for transferring the material from the upper die to the lower die.
JP 2002-210536 A

  However, the drawing machine 16 requires that the pressing direction of the pressing hydraulic cylinder 11 be the lateral direction and that the knockout force be applied from the direction opposite to the pressing direction by the knockout hydraulic cylinder 14, FIG. When the depth D dimension shown in FIG. 7 is large and a plurality of drawing machines 16 are arranged side by side to form a horizontal drawing machine row, there is a disadvantage that a large installation space is required. In addition, since the horizontal drawing machine 16 takes up space, it is difficult to change the layout and the number of drawing processes.

In addition, the multistage forging machine and the transfer press described in Patent Document 1 have a built-in conveying device in order to efficiently carry out the molding operation, and therefore the number of drawing processes cannot be easily changed. There was a problem.
The present invention provides a drawing machine row that eliminates the above-mentioned problems of the prior art, does not take up space for the drawing machine itself, and can easily change the layout and the number of drawing processes. With the goal.

  The present invention relates to a vertical press-type drawing machine row in which a plurality of vertical presses are arranged side by side, all of the vertical presses being guided by guide rods fixed to a bed plate and an upper plate. A slider that moves up and down in the press space with a single hydraulic cylinder mounted on the bed, a gantry having an internal space fixed to the bed plate and capable of moving the knockout plate up and down, and a knockout plate disposed in the internal space. In addition, the vertical push-type drawing machine row is characterized in that the knock-out plate is a slider-linked type that moves up and down with the movement of the slider.

  In that case, all the slider interlocking methods of the vertical press are arranged in the internal space with the lower end portion of the connecting rod which is connected to the slider at the upper end portion and is arranged to move up and down through the bed plate. It is preferable to use a vertical push-type drawing machine row as a knockout mechanism connected to the knockout plate.

  According to the present invention, a drawing machine having a simple structure that does not take up a place without incorporating a conveying device in the processing machine itself that performs drawing processing is provided, and a plurality of vertical presses having a simple structure that does not take up this place are provided. Since the vertical push-type drawing machines are arranged side by side, the installation space is small, and the layout and the number of drawing processes can be easily changed.

Hereinafter, a case where the present invention is applied to the drawing processing of a vehicle steering shaft component will be described with reference to the drawings. Fig.1 (a) is a longitudinal cross-sectional view which shows the structure of the saddle-type press suitable for using in the drawing machine row | line | column concerning embodiment of this invention, FIG.1 (b) is the side view.
In FIG. 1A, B indicates the width of the saddle press 1 that performs drawing, and in FIG. 1B, D indicates the depth of the saddle press 1 including the hydraulic unit 2A. When drawing with the vertical press 1, the upper die 4 is attached to the slider 3, the lower die 6 is attached to the bed plate 5, and then the lower die 6 is placed under the workpiece W (not shown). , The slider 3 is lowered by one hydraulic cylinder 2, and the upper part of the workpiece W is pressed by the lower die 6.

  That is, the vertical press 1 described above is formed in the press space by a guide rod 10 fixed to the bed plate 5 and the upper plate, and a single hydraulic cylinder 2 mounted on the upper plate while being guided by the guide rod 10. A slider 3 that moves up and down, a frame 7 that is fixed to the bed plate 5 and has an internal space S in which the knockout plate 8 can move up and down, and a knockout plate 8 that is disposed in the internal space S are provided. The knockout plate 8 is a slider interlocking system that moves up and down with the movement of the slider 3, and a workpiece W after drawing is drawn by a knockout pin (not shown) of an appropriate length attached to the knockout plate 8. As a vertical drawing machine that discharges The vertical press 1 having such a structure is a drawing machine having a simple structure.

  1A and 1B, reference numeral 1A denotes a tension bar that receives a force during drawing, and in this embodiment, there are two tension bars, which are fixed to the bed plate 5 and the upper plate. In addition, four guide rods 10 for guiding the slider 3 to be moved up and down are connected to the knockout plate 8 and two connecting rods 9 are moved up and down as the slider 3 moves. The slider interlocking method of the knockout plate 8 to which the knockout pin is attached will be described later.

The width B of the vertical press 1 is approximately the same as the width B of the horizontal drawing machine 16 shown in FIG. 7, but the depth D of the vertical press 1 is the same as that of the horizontal drawing machine 16. It can be much smaller than that. Therefore, the vertical press 1 shown in FIG. 1 is a drawing machine having a simple structure that does not take up space as compared with the horizontal drawing machine 16.
For this reason, the vertical press drawing machine row according to the embodiment of the present invention requires less installation space, and even when the specification of drawing parts changes, the layout is changed and the number of drawing processes is changed. Can be easily done. For example, FIG. 2 shows a layout of a linear arrangement when drawing a shaft part for an automobile steering in five steps, and FIG. 3 shows another L-shaped arrangement layout. As described above, the layout can be easily changed from the layout of the linear array to the layout of the L-shaped array, or vice versa.

  FIG. 4 shows a layout of an L-shaped arrangement in the case of drawing the steering wheel parts for automobile steering in six steps. The change of the number of drawing processes from 5 to 6 is performed, for example, when the part length L of the shaft is increased and the workpiece W is buckled when the drawing is performed in 5 processes. According to the vertical press drawing machine row according to the embodiment of the present invention, a vertical press 1 having a simple structure that does not take up space is added from an array in which five processing machines are arranged. The number of drawing processes can be easily changed by arranging 6 in a line.

  In that case, all the slider interlocking systems of the vertical press 1 are connected to the internal space S by connecting the lower end of the connecting rod 9, which has an upper end connected to the slider 3 and is disposed so as to be vertically movable through the bed plate 5. It is preferable to use a vertical push-type drawing machine row as a knockout mechanism connected to the arranged knockout plate 8 (see FIGS. 1A and 1B). For example, the knockout plate 8 and the connecting rod 9 are connected by engaging a double nut with the male thread at the lower end of the connecting rod 9.

  The reason for this is that when drawing is performed between the upper die 4 attached to the slider 3 and the lower die 6 attached to the bed plate 5, first, the lower part of the workpiece W is set on the lower die 6, and then The slider 3 is lowered by one hydraulic cylinder 2, the upper part of the workpiece W is pressed by the upper die 4, and the lower part of the workpiece W can be drawn so as to follow the inner shape of the lower die 6. . After the lowering process of the slider 3 is completed, the slider 3 is lifted by one hydraulic cylinder 2 and a knockout pin having an appropriate length mounted on the slider interlocking knockout plate 8 disposed in the internal space S of the gantry 7. The workpiece W after drawing can be reliably discharged from the lower die 6. When drawing in the vertical press 1 performing the first step is completed in this manner, the drawing is sequentially performed in the same manner in the vertical press 1 performing the subsequent steps. As described above, the vertical pressing type drawing machine row in which a plurality of vertical presses 1 are arranged side by side makes it possible to efficiently perform a plurality of drawing processes with a number of drawing processes.

At that time, two through holes corresponding to the diameters of the rods are formed in the bed plate 5 of the vertical press 1 so as to correspond to the two connecting rods 9 so that the connecting rod 9 moves up and down smoothly. Passing through the through holes provided in the bed plate 5 through appropriate bushes or the like is preferable because the connecting rod 9 can be moved up and down stably.
In addition, all the members (including the hydraulic cylinder 2 and the hydraulic unit) used in the vertical press 1 except for the upper die 4 and the lower die 6 have the same dimensions and materials. This is preferable because the manufacturing cost per drawing machine can be reduced. The members of the vertical press 1 include the slider 3 as a steel plate obtained by processing a steel material, the bed plate 5, the upper plate, and the knockout plate 8 disposed in the internal space S as a steel plate. Two tension bars 1A that receive processing forces, two connecting rods 9 that move up and down in conjunction with the slider 3, and four guide rods 10 that guide the slider 3 are made of steel that has been processed from steel bars, and the internal space It is preferable in terms of balance between cost and strength that the gantry 7 having S is made of steel combined with steel and the knockout pin is made of steel.

  The present invention was applied to a drawing process of an automobile steering shaft component using a material having an outer diameter of 30 mm and a thickness of 3 mm. When the part length L of the shaft is 200 mm, the drawing process can be performed with five processes without causing buckling in the shape shown in FIG. The layout at that time is the linear arrangement shown in FIG. 2, and the layout when the specification is changed to increase the part length L of the shaft is the L-shaped arrangement shown in FIG. That is, if the drawing process is performed in 5 steps when the part length L of the shaft is as long as 350 mm, buckling occurs in the first drawing process, resulting in a defective product. The layout change and the number of drawing processes are changed by adding one vertical press 1 with a simple structure that does not take up space, arranging six processing machines, and changing the layout from a linear array to an L-shaped array Was easy to do.

  When the number of drawing steps is six, the drawing in the first and second steps is a drawing of the amount obtained by dividing the amount of processing in the first step when the number of drawing steps is five. Went to each. In other words, when the number of drawing steps is six, in the first step, the first drawing is performed as a pre-molding by dividing the amount of processing in the first step when the number of drawing steps is five. (See FIGS. 5A and 5B).

(A) is an AA longitudinal cross-sectional view which shows the structure of the vertical press suitable for use in this invention, (b) is the side view. It is a top view which shows an example of the drawing machine row | line | column concerning this invention. It is a top view which shows the other example of the drawing machine row | line | column concerning this invention. It is a top view which shows the other example of the drawing machine row | line | column concerning this invention. It is a fragmentary sectional view which illustrates the drawing process of a shaft part for steering in case parts length L differs. It is a side view which shows a horizontal type | mold shaft component drawing machine. It is a top view which shows the installation space at the time of arranging a plurality of horizontal shaft parts drawing processing machines.

Explanation of symbols

W Work material B Width D Depth S Internal space 1 Vertical press 1A Tension bar 2 Hydraulic cylinder 2A Hydraulic unit 3 Slider 4 Upper die 5 Bed plate 6 Lower die 7 Mounting base 8 Knockout plate 9 Connecting rod 10 Guide rod 11 Pressing hydraulic pressure Cylinder 12 Die set 13 Knockout pin 14 Hydraulic cylinder for knockout 15 Hydraulic unit 16A Mounting base 16 Special drawing machine

Claims (2)

  A vertical press type drawing machine row in which a plurality of vertical presses are arranged side by side, all of the vertical presses being mounted on the upper plate while being guided by a guide rod fixed to the bed plate and the upper plate. A slider that moves up and down in the press space by one hydraulic cylinder, a gantry having an internal space fixed to the bed plate and capable of moving the knockout plate up and down, and a knockout plate disposed in the internal space, the knockout A vertical push-type drawing machine row characterized in that the plate is a slider-linked type that moves up and down with the movement of the slider.   A knock-out plate in which the slider interlocking method of the vertical press is all connected to the slider, and the lower end portion of a connecting rod arranged through the bed plate so as to be vertically movable is disposed in the internal space. The drawing machine row according to claim 1, wherein a knockout mechanism connected to the drawing machine is used.

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