JPH0220693A - Press machine - Google Patents

Abstract

PURPOSE:To shorten the total length of a press machine and to reduce its size and weight by providing a window hole in the intermediate of a slide member so that an eccentric shaft and a pitman are built up in the intermediate of the slide member. CONSTITUTION:A slide member 2 holding a forming tool at its left is built in a hollow holding 1 provided so that it can move in the right and left direction. So that guide member 3 provided on both right and left side parts on both end parts of the housing 1 can be supported freely slidably through buses 4. The window hole 5 is provided so that a ringed frame body is formed in the intermediate part of the slide member 2 and the eccentric shaft 6 which supports both end parts freely rotatably between the side plates of the housing 1 is inserted into the window hole 5 and the base end part of the pitman 7 is engaged freely oscillatorily with the eccentric shaft 6. Besides, a bulge part 8 is provided in the middle of the left edge part of the window hole 5 of the slide member 2 and the tip part of the pitman 7 in a nesting structure is connected freely turnably by a pin 9. By this method, the total length of the press machine is shortened and its size and weight can be respectively reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a press device which is adapted to apply a pressing motion to a forming tool by driving an eccentric shaft mechanism.

[Prior Art] In order to improve the quality of materials by crushing internal defects in materials such as billets, blooms, and slag, in recent years, forging presses have been installed in rolling lines, etc., and forging tools that move closer and farther apart have been installed. It has been proposed to feed the material intermittently and reduce it sequentially.

An example of such a conventionally proposed forging press or a part for operating a forging tool of a press for forging bars, stepped shafts, etc. is arranged horizontally on a base, as shown in FIGS. 13 and 14. A hollow housing a is installed so as to be movable in the left and right directions in the figure using a position adjustment device (not shown),
An eccentric shaft rotatably driven by a motor (not shown) is rotatably supported at one end of the housing a, and the base end of the Pitman C is swingably fitted onto the eccentric shaft. At the same time, the proximal end of a slide member d, which is inserted into the housing a with a forging tool (not shown) held at its end and is inserted into the housing a, is rotatably connected to the distal end of the pitman C by a pin e, Further, guide portions f for guiding the sliding of the slide member d are provided inside the other end and the intermediate portion of the housing a, and a bushing is provided between the guide portions f and the slide member d. When the Pitman C is swung by the rotation of the eccentric shaft d, the slide member d is reciprocated in the left and right directions in the figure, causing the forging tool to move forward and backward, and to move the forging tool forward and backward across the press line. The forging tools arranged opposite to each other are made to approach and separate from each other.

[Problems to be Solved by the Invention] However, in the case of the forging press described above in which the slide member d is reciprocated by the eccentric shaft and the pitman e, the slide member d is next to the pitman C supported by the eccentric shaft. Since these are linearly connected, the distance between the guide parts f provided in the housing a must be set to an appropriate length to prevent tilting when the slide member d reciprocates due to the swinging of the pitman C. As a result, the overall length of the press inevitably becomes longer and a larger installation space is required.
There is a problem in that it becomes expensive due to the increased weight.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a press device that can be manufactured with a short overall length, small size, light weight, and low cost.

[Means for Solving the Problems] In order to achieve the above object, the present invention has one end of a pitman fitted into an eccentric shaft that is rotationally driven so as to be able to swing freely, and the swinging motion of the pitman is controlled by the swinging motion of the pitman. In a press device that converts the reciprocating motion of a slide member connected to the other end to give a pressing action to a forming tool held by the slide member, a window hole is provided in the middle part of the slide member, and a window hole is provided in the middle of the slide member. a guide for inserting the eccentric shaft into the window hole, connecting the other end of the Pitman with one end fitted to the eccentric shaft near the window hole of the slide member, and guiding the reciprocating movement of the slide member; The window hole portion is located on both sides of the window hole portion.

[Function] When the eccentric shaft is rotated, the pitman is oscillated, and the oscillating motion of the pitman is converted into a reciprocating motion of the slide member, thereby imparting a pressing action to the forming tool. The eccentric shaft and pitman are not linearly connected to the ends of the slide member, but are assembled at the middle of the slide member, so that the overall length of the press device is shortened.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention, in which a forming tool is attached to one end (left end) in a hollow housing 1 installed movably in the left and right directions in the drawings by a position adjustment device (not shown). (not shown) is supported such that both ends of the slide member 2 are slidably supported by guide portions 3 provided at both left and right ends of the housing 1 via bushes 4. When assembled, a window hole 5 is formed in the middle part of the slide member 2 so that a ring-shaped frame is formed.
and insert both ends into the window hole 5 into the housing 1.
An eccentric shaft 6 rotatably supported is inserted between the side plates of the slide member 2, and the base end of a pitman 7 is fitted in the eccentric shaft 6 so as to be swingable. The tip of the pitman 7 is telescopically engaged with an overhanging portion 8 extending from the center of the left edge and rotatably connected by a pin 9. Note that the above configuration shows only the right mechanism of the pair of left and right mechanisms.

Now, when the eccentric shaft 6 is rotated by the drive of a motor (not shown), the pitman 7 fitted on the eccentric shaft 6 is caused to swing within the window hole 5 of the slide member 2, and this swinging motion , is transmitted to the slide member 2 via a pin 9 that connects the tip of the pitman 7 and the overhang 8 of the window hole 5 in the slide member 2. At this time, since both ends of the slide member 2 are movably supported by guide portions 3 provided at both left and right ends of the housing 1, the slide member 2 reciprocates in the left and right directions in the figure without tilting. Due to this reciprocating movement, the forming tool held at the tip of the slide member 2 reciprocates together with the slide member 2, and the left and right forming tools, which are placed facing each other across the press line, approach each other. They will be separated and the material between the forming tools will be pressed.

In the above, the eccentric shaft 6, the pitman 7, and the slide member 2 are not linearly connected as in the conventional case, but are constructed so that the eccentric shaft 6 and the pitman 7 are incorporated into the slide member 2. The total length of the press can be made shorter than that of conventional presses that are connected together. Further, since the slide member 2 is supported at both end positions with the eccentric shaft 6 and the pitman 7 interposed therebetween by the cutting edge portions 3 provided at both the left and right ends of the housing 1, the distance between the guide portions 3 can be lengthened. Thereby, the force acting on the guide portion 3 from the slide member 2 side can be reduced, and wear can be reduced.

Next, FIGS. 5 and 6 show another embodiment of the present invention, in which a large-diameter stepped portion 6a8 is provided at the center of the eccentric shaft 6, and two plates are sandwiched between the large-diameter stepped portion 6a. Pitman 7a,
Each base end of the pitman 7b is fitted to both ends of the eccentric shaft 6, and the tips of the two pitmen 7a and 7b are fitted to both ends of a pin 9 passed through the slide member 2. .

In this embodiment, the same functions and effects as in the embodiments shown in FIGS. 7a.

7b etc. can be installed from the side of the housing 1, making assembly easier.

FIGS. 7 to 9 show further modifications of the embodiment shown in FIGS. 5 and 6 above. That is, in the case of the embodiment shown in FIGS. 5 and 6 above, the dimension in the axial direction of the large-diameter stepped portion 6a provided at the center of the eccentric shaft 6 is the thickness of the window hole 5 of the slide member 2. However, instead of this, the dimension in the axial direction of the large-diameter stepped portion 6a and the thickness of the window hole 5 are made equal.

If such a system is adopted, only the eccentric shaft 6 needs to be positioned within the window hole 5 of the slide member 2, so the window hole 5 can be made smaller, thereby improving the structural strength compared to the above embodiment. can.

Next, FIGS. 10 to 12 show an embodiment in which a position adjustment device for a slide member 2 is assembled to a housing 1. As shown in FIG. That is, in the same configuration as the embodiment shown in FIGS. 7 to 9 above, a guide hole 10 extending in the left-right direction is provided in the side wall of the housing 1, and the housing 1
A rectangular cylindrical support frame 11 is inserted into the guide hole 10.
The eccentric shaft 6 is rotatably supported between the side walls on the left end side of the support frame 11, and a guide portion 3' is provided on the inner wall of the center portion of the support frame 11. The right end portion of the slide member 2 is supported by the guide portion 3' via a bush 4 so as to be slidable in the left-right direction. Further, at the right end inside the housing 1, there is a screw shaft 1 which is rotated by a worm gear mechanism 12.
3 is provided to face inside the support frame 11, and a piston nut 14 is screwed onto the threaded shaft 13 so as to be movable in the left and right directions with respect to the inner wall of the support frame 11, and the piston nut 14 and the support frame A pressure fluid chamber 17 is formed between the ring-shaped protrusion 15 provided on the inner wall of the worm gear mechanism 11 and a pressure fluid chamber 17 that communicates with an external accumulator 16.
The piston nut 14 is moved in the left-right direction by rotating the screw shaft 13 by the drive of
The movement of the support frame 11 is transmitted from the eccentric shaft 6 to the slide member 2 via the pitman 7a, 7b1 pin 9, and the position of the slide member 2 is changed. be adjusted. Further, a bevel gear 21 that meshes with a bevel gear 20 supported on the outer side of the support frame 11 is attached to one end of the eccentric shaft 6, and a bevel gear 21 is connected to the axial center of the bevel gear 20 with a drive shaft 22 on the motor side. Moreover, since the spline shaft 23 disposed in the left-right direction passes through the spline shaft 23, and the spline shaft 23 and the bevel gear 20 can be easily displaced relative to each other regardless of the position of the support frame 11 in the left-right direction, the meshing of the hevel gears 20 and 21 is maintained. This ensures that the power from the drive shaft 22 on the motor side is transmitted to the eccentric shaft 6. Reference numeral 19 denotes a reaction force receiving rod that connects the opposing housings.

With this configuration, the position of the slide member 2 can be adjusted without moving the housing 1 itself, and when a load exceeding the capacity is generated, the oil in the pressure fluid chamber 17 is pushed out to the accumulator 16. It can protect the equipment from overloading beyond its capacity.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, according to the press device of the present invention, an eccentric shaft and a pitman for giving reciprocating motion to the slide member are incorporated in the intermediate portion of the slide member that holds the forming tool. The overall length of the press can be made shorter than that of conventional presses that are connected in a straight line, making it possible to reduce the size and weight of the press and manufacture it at low cost. Since the distance between the guide parts can be made longer, the force acting on the guide part can be reduced, so that excellent effects such as reducing wear on the guide part can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic cutaway plan view showing one embodiment of the press apparatus of the present invention, FIG. 2 is a view taken along the ■-■ arrow in FIG. 1, and FIG.
The l-l11 arrow view in the figure, Figure 4 is IV-IV in Figure 1.
5 is a schematic cross-sectional plan view showing another embodiment of the present invention, FIG. 6 is a view taken along the Vl-Vl arrow in FIG. 5, and FIG. 7 is a diagram showing still another embodiment of the present invention. 8 is a schematic cross-section plan view shown in FIG. 7, and FIG.
10 is a schematic cross-sectional plan view showing still another embodiment of the present invention, FIG. 11 is a view taken along the line XI-XI in FIG. 10, and FIG. 12 is a xn-xn view in FIG. 13 is a schematic cutaway plan view of a conventionally proposed forging press, and FIG. 14 is an xrv-xrv view of FIG. 13. 1... Housing, 2... Slide member, 3...
Guide part, 5... Window hole, 6... Eccentric shaft, 7.7a,
7b...Pitman, 9...Pin, 11...Support frame.

Claims (1)

[Claims] (1) One end of the pitman is swingably fitted to the rotationally driven eccentric shaft, and the swinging motion of the pitman is converted into a reciprocating motion of a slide member connected to the other end of the pitman. In the press device, a window hole is provided in the middle part of the slide member, the eccentric shaft is inserted through the window hole, and one end is attached to the eccentric shaft. The other end of the fitted pitman is connected to the vicinity of the window hole of the slide member, and guide portions for guiding the reciprocating movement of the slide member are located on both sides of the window hole portion. Characteristic press equipment.