JPH0716800B2 - Press machine - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a press machine, and more particularly to a press machine capable of guiding a vertically movable slide with high precision without “rattle”. Regarding

[Technical Background of the Invention and Problems of Conventional Apparatus] In a conventional press machine, a slide is driven by various driving devices and slidably moves in a guide groove provided in a frame to perform a press operation. It was

In this case, an oil sump groove is provided on the sliding surface of the slide, or lubricating oil is constantly supplied to prevent heat generation. However, there is "rattle" between the slide and the guide groove or the gib (holding plate). For example, the alignment between the upper mold and the lower mold becomes inaccurate, resulting in “rattle”.
Without this, the sliding resistance is increased and the sliding portion is abraded, resulting in the inconvenience that the gib must be adjusted frequently.

[Object of the Invention and Outline thereof] In view of the conventional problems as described above, the present invention provides a press machine in which a slide is vertically movable along a vertical guide provided on a frame, and the frame serves as a guide. The ball case provided on the slide is provided so as to be vertically movable on the vertical spline rail provided on the upper and lower sides, and is movable along the annular guide portion provided on the ball case and the vertical direction provided on the spline rail. A large number of steel balls that can be moved along the guide groove in the direction are provided, and a plurality of steel balls that move along the guide groove of the spline rail are pressed against the spline rail so as not to rattle. .

[Embodiment of the Invention] First, referring to FIG. 7, a slide 1 of a conventional press machine 101 is shown.
03 and the guide groove 107 provided in the frame 105 and parallel to the moving direction of the slide 103 will be described.

In the guide groove 107 of FIG. 7, for example, a porous oil-impregnated metal 109 is used.
Even if the slide 103 is attached corresponding to the protruding portion 111, the right one is attached to the push plate 115 which can be adjusted in the left and right direction by the push and pull bolt 113.

A gib (holding plate) 117 is provided in front of the guide groove 107.
The gib 117 is formed in the front-back direction of the guide groove 107 (7th
The vertical dimension of the figure) is adjustable.

As described above, the conventional slide 103 shown in FIG. 7 has various disadvantages.

Next, an embodiment according to the present invention will be described with reference to FIGS.

The slide 3 of the press machine 1 according to the embodiment of the present invention is driven by the eccentric disc 7 provided on the eccentric device shaft 5 so that the connecting rod 9 is omitted from the top dead center position shown in FIG. Move up and down while rocking to the dead point.

A ball joint 11 is screwed to the lower end of the connecting rod 9, and a ball retainer 13 connects the upper end of the slide 3.

Column part (starting part) 17 of frame 15 of press machine 1
A spline rail 19 parallel to the moving direction of the slide 3 is provided on the front surface of the slide 3, and ball cases 23 are vertically separated via a bracket 21 on the rear surface of the slide 3 (the right surface in FIG. 3) one by one. It is provided.

As illustrated in FIG. 4, the spline rail 19 has a railroad track shape with a widened head, and angular projections 25 are provided at both ends of the widened head. A vertical guide groove 25G for guiding the steel ball is formed in the portion. The ball case 23 is cut out at a portion corresponding to the spline rail 19, and the ball case 23 is provided with an annular guide portion that guides a large number of balls similarly to the configuration of a normal ball spline.

The spline rail 19 is fixed to the column portion 17 by a number of fasteners such as bolts 27.

The plurality of steel balls 29 that move along the guide groove 25G of the above-mentioned angular protrusion 25 are pressed by a ball retainer (not shown) so that there is no play with preload, and the longitudinal direction of the ball case 23 described above. The ball-shaped case moves near the one end of the ball case 23 while maintaining a continuous row of rows.
It is circulated by moving away from the guide groove 25G and moving to the middle of the thickness along the annular guide portion of the ball case 23 and moving in the opposite direction.

The steel ball 31 which is moving in the opposite direction away from the guide groove 25G of the angular protrusion 25 is 31.

That is, the steel ball 29 in a state of pressing the above-mentioned angular protrusion 25.
The rows of the ball cases 23 are located away from the angular protrusions 25.
The steel ball 31 moves in the opposite direction in the middle of its thickness.

FIG. 5 illustrates a second embodiment in which the slide case 3 is provided on the slide 3 in two pairs with the ball case 23 corresponding to the spline rail 19 described above, and FIG. 6 shows a large slide 3 area such as four pillars. A third example of carrying out the present invention is shown in the straight side press 33, in which the slide 3 is provided with four pairs of ball cases 23 guided by the four spline rails 19 on the same plane. is there.

[Effects of the Invention] As will be understood from the above description of the embodiments, in short, the present invention comprises a slide (3) vertically movable along a vertical guide provided on the frame (17). It is a press machine and slides (3) on the vertical spline rail (19) provided on the frame (17) as a guide.
The ball case (23) provided on the ball case (23) is provided so as to be movable up and down, and is movable along an annular guide portion provided on the ball case (23) and is provided on the spline rail (19) in the vertical direction. A large number of steel balls (29, 31) that can move along the guide groove are provided, and the plurality of steel balls (29) that move along the guide groove of the spline rail (19) are splined so that there is no rattling. It is made by pressing against the rail (19).

As is apparent from the above configuration, in the present invention, the ball case 23 provided on the slide 3 is vertically movably engaged with the vertical spline rail 19 provided on the frame 17 and is provided on the slide 3. Of the plurality of steel balls 29 provided movably along the annular guide portion and along the guide groove of the ball spline 19, the spline rail
“Rattling” multiple steel balls moving along 19 guide grooves
Since it is pressed against the spline rail 19 so as to be free from rolling, vertical movement of the slide 3 can be performed extremely accurately and smoothly, and press processing with higher precision than in the past can be performed. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a sliding portion of a press machine according to an embodiment of the present invention. FIG. 2 is a front view of the same portion as above. FIG. 3 is a right side view of FIG. 4 FIG. 4 is engagement of a spline rail and a ball case. FIG. 5 is an enlarged partial explanatory view of the same portion as FIG. 1 of an embodiment having two pairs of guide portions. FIG. 6 is the same partial plan view as FIG. 1 in which the present invention is applied to a straight side press. The drawing is a partial plan view illustrating a slide guide mechanism of a conventional press machine. (Explanation of the symbols indicating the main parts of the drawing) 1 ... Press mechanism, 3 ... Slide, 19 ... Spline rail, 23 ... Ball case, 25 ... Square protrusion, 27 ...
… Bolts, 29 …… Steel balls (pressing), 31 …… Steel balls (returning apart)

Claims (1)

[Claims] 1. A press machine comprising a slide (3) vertically movable along a vertical guide provided on a frame (17), and a vertical spline rail provided on the frame (17) as a guide. The ball case (23) provided on the slide (3) is provided on the (19) so as to be vertically movable, and is movable along an annular guide portion provided on the ball case (23) and the spline rail. A plurality of steel balls (29, 31) that are movable along the vertical guide groove provided in (19) are provided, and a plurality of steel balls (29) that move along the guide groove of the spline rail (19) are provided. The press machine is characterized by pressing against the spline rail (19) so that there is no rattling.