JPH0259197A - Double action press - Google Patents

Abstract

PURPOSE:To obtain a double action press capable of holding a link mechanism in common use and reducing the expenditure and labor required for design, manufacture and maintenance by constituting an upper and a lower slide so that they can be driven vertically by a common link mechanism. CONSTITUTION:When a drive gear 5 and a main gear 6 are operated in sequence to rotate an eccentric part 8, the tip of a pitman 9 reciprocates and a rocker shaft 10 is reciprocally rocked through an arm 11. When the shaft 10 is reciprocally rocked, a rocking arm 27 fixed to the shaft 10 is reciprocally rocked and yoke arms 29, 30 are reciprocally rocked through small links 33, 34. Hereby, an upper slide 2 through a connection link 43 and a lower slide 3 through a connection link 44 and a hanging rod 47 approach to each other and separate from each other to press a press material 25 between an upper 48 and a lower die 50.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a double-acting press.

[Conventional technology] A conventional double-action press will be explained using FIG. 3.

An upper slide 2 and a lower slide 3 (not shown) for raising and lowering two molds and a lower mold are provided inside the housing l.

Further, a pair of drive shafts 4 which are rotated by a drive source (not shown) are provided at the upper part of the housing l, and the rotation of the drive shafts 4 is transmitted to a pair of main shafts 7 fixed to the housing 1 via a drive gear 5 and a main gear 6. The transmission can be transmitted to the eccentric part 8 which is integral with the main gear 6 and which is rotatably fitted on the outside.

One end of the pitman 9 is pivotally attached to the eccentric portion 8, and a pair of rocker shafts 10 are provided outwardly from the main shaft 7 of the housing 1, and the arm 11 attached to the rocker shaft 10 and the other end of the pitman 9 are connected to each other. The rocker shaft 10 is pivotally mounted so that the rocker shaft 10 can swing back and forth as the main shaft 7 rotates.

A first swinging arm 12 is attached to the rocker shaft 10, a triangular link 13 is rotatably supported on the main shaft 7, the tip of the swinging arm 12 and the triangular link 13 are connected by a connecting link 14, and The triangular link 13 and the upper slide 2 are connected by a rod 15, and the swing arm 12
By swinging, the upper slide 2 can be raised and lowered via the connecting link 14, the triangular link 13, and the rod 15.

Further, a second swing arm 16 having a different length from the first swing arm 12 is provided on the rocker shaft 10, and the upper end of the vertical connecting rod 7 is pivotally connected to the tip of the swing arm 6. The tip of an arm 19 attached to a support shaft 18 at the bottom of the housing l is pivotally attached to the lower end of the vertical connecting rod 17, and an arm 21 is further attached to another support shaft 20 pivoted at the bottom of the housing l. The tip of the arm 19 is connected by a connecting link 22, and the tip of another arm 23 attached to the support shaft 20 and the lower slide 3 are connected by a rod 24. connecting rod 17, arm 19, connecting link 22, arm 21,
23, the lower slide 3 can be moved up and down via the rod 24.

Note that 25 is a pressed material.

In this double-acting brace, the rotation of the eccentric portion 8 is converted into a reciprocating swing of the rocker shaft 10, and the reciprocating swing of the rocker shaft 10 swings the swing arms 12 and 16 of mutually different lengths, thereby creating separate link mechanisms. Upper slide through 2
The press material 25 is pressed by the upper mold and the lower mold by driving the lower slide 3 and raising and lowering it independently.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional double-action press, the upper slide 2 and the lower slide 3 have their own elevating and lowering operations determined separately. A link mechanism (swinging arm 12, connecting link 14, triangular link 13, rod 15) that matches the movement of the lower slide 3 is installed, and a link mechanism (swinging arm 16, vertical connection) that matches the lifting movement of the lower slide 3. The rod 17, arm 19, connecting link 22, arms 21, 23, and rod 24) must be provided separately, which requires a lot of cost and labor in terms of design, manufacturing, and maintenance.

In view of the actual situation of dual slides, the present invention aims to reduce costs and labor required for design, manufacturing, and maintenance by driving the upper and lower slides up and down using a common link mechanism.

[Means for Solving the Problems] The present invention provides a double-acting press in which the central part of a symmetrical swinging arm 27 is fixed to a rocker shaft 10 that can swing back and forth, and the center part of a swinging arm 27 is symmetrical with respect to the rocker shaft 10. The main shaft 7 and the support shaft 28 are arranged at the positions of the main shaft 7 and the support shaft 28, and the base ends of arms 29 and 30, which have the same shape and opposite left and right directions, are rotatably supported on the main shaft 7 and the support shaft 28, respectively. The same positions of the arms 29 and 30 and the corresponding tips of the swinging arm 27 are connected by small links 33 of equal length.
34 so that the phases of both arms 29 and 30 are shifted from each other by an angle equal to the rocking angle of the rocker shaft 10, and an upper slide that holds the tip of the arm 29 on the main shaft 7 side and the upper mold 48. 2 to connect link 4
3, and the arm 3 on the support shaft 28 side.
0 and a hanging rod 47 supporting a lower slide 3 for raising and lowering a lower mold 50 are connected using a connection link 44 having the same length as the connection link 43. Such is the case.

[Function] By using the symmetrical swinging arm 27, a pair of small links 33, 34, arms 29, 30, and connection links 43, 44 having the same shape and size, the upper slide 2 and the lower slide 3 Since the press material can be pressed by raising and lowering the presses with their phases shifted by approximately 180' from each other, the link mechanism of the upper slide 2 and the lower slide 3 can be shared.

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

FIG. 1 shows one embodiment of the present invention, and the parts in the figure with the same reference numerals as in FIG. 3 represent the same parts.

The central part of a symmetrical swinging arm 27 is fixed to the rocker shaft 10, which swings back and forth through the eccentric part 8, pitman 9, and arm 11 as the main gear 6 rotates, and the main shaft 7 is A support shaft 28 is provided at a symmetrical position, and the base ends of two-pronged arms 29 and 30, which have the same shape as the main shaft 7 and the support shaft 28 and have opposite left and right directions, are rotatably supported. The tips of the first arms 31, 32 of the arms 29, 30 and the corresponding ends of the swing arm 27 are bifurcated using small links 33, 34 and pins 35, 3B, 37, 38 of equal length, respectively. Arm 29
．． The two-pronged arm 29°30
A link mechanism is constructed by pivotally connecting the upper ends of connection links 43 and 44 of equal length to the tips of the second arms 39 and 40 using pins 41 and 42, respectively. The upper slide 2 is pivotally supported using a pin 45 at the lower end of the connection link 43 that is pivoted, and the hanging rod 47 is pivoted using a pin 46 at the lower end of the connection link 44 that is pivoted to the bifurcated arm 3o on the support shaft 28 side. The lower slide 3 is fixed to the lower end of the hanging rod 47 by pivoting the upper end.

In addition, 48 is an upper mold, 49 is a trolley that holds the lower mold 50 so that it can be raised and lowered, and 51 is a lower slide 3 for pushing the lower mold 50.
52 is a blank holder for holding the press material 25, and 53 is a cylinder for raising and lowering the blank holder 52.

Next, the operation will be explained.

When a drive source such as a motor (not shown) is driven, the drive gear 5,
The main gears 6 are sequentially operated and the eccentric portion 8 also rotates. When the eccentric part 8 rotates, the tip of the pitman 9 moves back and forth, and the rocker shaft 10 swings back and forth via the arm 11.

When the rocker shaft 10 swings back and forth, the swing arm 27 fixed to the rocker shaft 10 swings back and forth, causing the two-pronged arm 29, 30 to swing back and forth via the small links 33, 34. By reciprocating the two-pronged arms 29 and 30 in this manner, the upper slide 2 via the connection link 43, the connection link 44 and the hanging rod 4
7, the lower slides 3 move toward and away from each other,
The press material 25 is pressed between the lower mold 48 and the lower mold 50.

The above operation will be explained in more detail with reference to FIG. FIG. 2 is a diagram showing the relationship between the position of the swing arm 27 and the stroke of the upper and lower slides 2.3. Line A in the diagram shows the stroke of the upper slide 2, and line A shows the stroke of the lower slide 3. ing.

The swing arm 27 moves to the right as shown by the solid line in the left half of Figure 1.
At the two-pronged position a, the tip of the two-pronged arm 29 on the main shaft 7 side is pulled up to the left in FIG. is pushed downward in FIG. 1, lowering the lower slide 3 to the bottom dead center.

From this state, when the swinging arm 27 swings to the upper left position as shown by the imaginary line in the left half of FIG. The upper slide 2 is pushed down to the bottom dead center, and at the same time, the tip of the two-pronged arm 30 on the support shaft 28 side is pulled up to the upper right in FIG. When the position of 27 reaches the front and back of b”-lower mold 48
Pressing is carried out at a temperature of 50°.

Next, when the swing arm 27 swings in the opposite direction to the upward-rightward position a' indicated by the solid line, the upper slide 2 rises symmetrically to the above and returns to the top dead center. , the lower slide 3 similarly descends symmetrically to the above and returns to the bottom dead center.

At this time, the upper slide 2 and the lower slide 3 are connected to each other by a symmetrical swinging arm 27, a pair of small links 33, 34 having the same shape and size, a bifurcated arm 29, 30, a connection link 43, 44, etc. As shown in Figure 2, they are driven up and down with a phase shift of about 180' from each other, so
By standardizing the link mechanism, costs and labor for design, production, and maintenance are reduced.

Note that the double-action press of the present invention is not limited to the above-mentioned embodiments (it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the double-acting press of the present invention, a vertically symmetrical swinging arm and a set of small links, arms, connection links, etc. of the same shape and size are used to The slides are driven approximately 180 degrees out of phase with each other, making it possible to standardize the link mechanism and improve design and design.
It can bring about excellent effects such as reducing production and maintenance costs and labor.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention taken from the front with a different partially broken line; FIG. 2 is a diagram showing the relationship between the position of the swing arm and the stroke of the upper and lower slides in FIG. 1; FIG. 3 is a perspective view of a conventional example. In the figure, 2 is the upper slide, 3 is the lower slide, 7 is the main shaft,
10 is a rocker shaft, 11 is an arm, 27 is a swing arm, 28 is a support shaft, 29.30 is a bifurcated arm, 33.3
4 is a small link, 43.44 is a connection link, 47
48 indicates a hanging rod, 48 indicates an upper mold, and 50 indicates a lower mold. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In a double-acting press, the central part of a symmetrical swinging arm 27 is fixed to a rocker shaft 10 that can swing back and forth, and the main shaft 7 and a support shaft 28 are placed at symmetrical positions with respect to the rocker shaft 10 as a reference. The base ends of arms 29 and 30 having the same shape and opposite left and right directions are rotatably supported on the main shaft 7 and the support shaft 28, respectively, and the same position of the arms 29 and 30 and the swinging Corresponding tips of the movable arms 27 are connected by small links 33, 3 of equal length, respectively.
4, the arms 29 and 30 are connected so that the phases of the arms 29 and 30 are shifted by an angle equal to the rocking angle of the rocker shaft 10, and the tip of the arm 29 on the main shaft 7 side and the upper mold 48
The upper slide 2 that holds the is connected using a connection link 43, and the suspension rod 47 that supports the lower slide 3 for raising and lowering the lower mold 50 and the tip of the arm 30 on the support shaft 28 side is connected to the connection link 43. link 43
A double acting press characterized in that the press is connected using a connection link 44 of equal length.