JPH04157098A - Device for automatically adjusting fitting position of sliding member and pressing machine providing this automatic adjusting device - Google Patents

Abstract

PURPOSE:To eccentrically rotate a center shaft by rotating a worm wheel to adjust the stroke of a sliding member by fixing a rotary shaft of the worm wheel to the center shaft of a rocker arm in a pressing machine reciprocating the sliding member with the rocker arm and eccentrically setting the center shaft and the rotary shaft. CONSTITUTION:At the time of rotating a worm gear 23, the worm wheel 22 is rotated. Then, the center shaft 1 of rocker arm 2 fixed to the position eccentric with axis of the rotary shaft 20 thereof, is eccentrically revolved around the axis of the rotary shaft 20. At this time, as swivel connecting part 6 of one end side of the rocker arm 2 and member 3 for transmitting driving force is under the condition as if fixed. The rocker arm 2 revolves the swivel connecting part 8 of the other end of rocker arm and the sliding member 4 with the swivel connecting part 6 at the one end side of rocker arm as the supporting point. Therefore, action shifted to the position coming to longer than the ordinary stroke in the sliding member 4, is obtd.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention particularly relates to the mounting position of a sliding member with a relatively short stroke length, such as a ram in a medium-sized or small-sized press machine. This invention relates to a device that automatically adjusts the adjustment device, and a press machine equipped with this adjustment device.

[Conventional technology]

By the way, the stroke length of sliding members such as rams in medium-sized and small-sized press machines, etc. is usually set to about 30III11 to 50 mm, due to the small size of the workpiece. ing.

[Problem that the invention seeks to solve]

In this type of press machine, for example, if an abnormality occurs in the mold (both upper and lower molds), it is necessary to take out the workpiece from the mold due to the stroke length of the sliding member. There are also problems in that it is difficult to readjust the mold and perform other maintenance and inspection work.

In other words, in conventional press machines of this type, when taking out the workpiece in the event of an abnormality or performing maintenance and inspection work on the mold, the mold is usually removed from the machine body, the required work is performed, and then the mold is removed. I have to install this again.

Therefore, the above-mentioned mold removal work and its reinstallation work are troublesome, and during the reinstallation work, a great deal of effort is required for stroke and other fine adjustments, which reduces the overall production efficiency. There were some disadvantages.

The present invention allows workpieces to be taken out and discharged and maintenance and inspection of the mold and other parts to be carried out without removing the mold or the like from the machine body in the event of an abnormality in a medium- or small-sized press machine such as the one described above. It is an object of the present invention to provide an automatic adjustment device for the mounting position of a sliding member and a press machine equipped with this automatic adjustment device.

[Means for solving problems]

In order to deal with the above-mentioned conventional problems, an automatic adjusting device for the mounting position of a sliding member according to the present invention includes a pivotally connected rocker arm and a driving force transmitting member freely connected to one end of the rocker arm. and a sliding member freely connected to the other end, and in a press machine or the like configured to reciprocate the sliding member by swinging the rocker arm, the pivot shaft of the rocker arm described above is used. The rotating shaft of the worm wheel is fixed to the worm wheel, the axial center of the pivot shaft and the axial center of the rotating shaft are eccentric, and a worm gear is engaged with the worm wheel. .

Further, the press machine according to the present invention includes a rocker arm rotatably connected to a pivot shaft, a driving force transmitting member freely connected to one end of the rocker arm, and a driving force transmitting member freely connected to the other end. A press machine is provided with a sliding member and an automatic adjustment mechanism for the mounting position of the sliding member, and configured to reciprocate the sliding member by swinging the rocker arm, The automatic adjustment mechanism for the mounting position of the moving member fixes the rotating shaft of the worm wheel to the pivot of the rocker arm, makes the axis of the pivot eccentric to the axis of the rotating shaft, and attaches the worm gear to the worm wheel. It is characterized by being configured to be engaged with each other.

Note that the above-described sliding member includes a ram (slide) in a press machine or the like, a shank that is integrally attached to the ram, a movable mold that is integrally attached to the shank, and the like. Therefore, since the sliding member is provided so as to integrally reciprocate, the stroke length of the sliding member also means the stroke length of the ram, shank, movable type, etc.

[Effect]

According to the configuration of the present invention, by swinging the rocker arm around the pivot using the driving force transmitting member connected to one end of the rocker arm, the sliding member connected to the other end can be reciprocated. Therefore, the function and action of a so-called rocker arm type power press can be obtained.

According to the configuration of the present invention, when the worm gear is rotated, the worm wheel that is engaged with the worm gear rotates. When the worm wheel rotates, the pivot of the rocker arm, which is fixed at a position eccentric to the axis of the rotation shaft, rotates eccentrically about the axis of the rotation shaft. At this time, since the freely connecting portion between one end of the rocker arm and the driving force transmission member is in a fixed state, the rocker arm connects the other end and the sliding member with the freely connecting portion on the one end as a fulcrum. This means rotating the flexible joint side.

Therefore, by rotating the other end of the rocker arm, the sliding member can be moved to a position where the stroke is longer than the normal stroke.

〔Example〕

Next, the present invention will be explained based on embodiment figures.

FIG. 1 shows a rocker arm 2 rotatably mounted around a pivot shaft 1, a driving force transmitting member 3 freely connected to one end of the rocker arm 2, and a sliding member 3 freely connected to the other end of the rocker arm 2. A member 4 is provided, and by swinging the rocker arm 2 with the driving force transmitting member 3, the sliding member 4 freely connected to the other end can be reciprocated. A press machine is illustrated having the configuration of a configured rocker arm power press.

Further, this press machine is equipped with an automatic sliding member mounting position adjustment mechanism 5 for automatically adjusting the mounting position 1 of the sliding member 4, as will be described later.

In addition, a fluid driving source such as hydraulic pressure is connected to the connecting portion 6 between the rocker arm 2 and the driving force transmitting member 3 via a driving force transmitting member such as a connecting rod 3 □ and a pivot pin 3 □. The vertical reciprocating drive cuff is transmitted from an appropriate drive source (not shown) such as an electric drive source such as a pulse motor or a pulse motor. , the rocker arm 2 has its pivot 1
It is installed to swing around the center.

Further, the connecting portion 8 between the rocker arm 2 and the sliding member 4 described above is freely connected via a connecting member 9 such as a link 9 □ and a pivot pin 9 □ 93, so that the above-described rocker arm The rotation of the connecting portion 8 due to the swinging motion of the sliding member 4 is provided to change the sliding member 4 into an up-and-down reciprocating motion 10.

In addition, the above-mentioned sliding member 4 includes a ram (slide) in a press machine, a shank that is integrally attached to the ram, a movable side mold that is integrally attached to the shank, etc. On the side, a shank 41 freely connected to the connecting part 8 via the connecting member 9 and a movable upper mold 42 attached to the lower part of the shank are shown. Therefore, when the connecting portion 8 rotates due to the swinging of the rocker arm 2, the shank 4 and the movable upper die 4 are rotated.
A sliding member 4 consisting of 2 and 2 is provided to reciprocate up and down.

In addition, a fixed lower mold 1 is located below the movable upper mold 42.
1 are arranged to face each other, and a guide member 12 and a spring 13 are disposed on the side 1 of the fixed lower mold 11 to assist the vertical and reciprocating movement of the movable upper mold 4□.

The stroke length of the sliding member 4, that is, the movable upper mold 42 obtained by the rocking of the rocker arm 2 described above is approximately the same as the stroke length of the conventional sliding member, from 30 mm to 50 mm.
It is sufficient if it is set to about +m.

The automatic adjustment mechanism 5 also includes a rotating shaft 20 fixed to both ends of the pivot shaft 1 of the rocker arm 2, bearings 21 for supporting the rotating shaft 20, and a worm fixed to the rotating shaft 20. It is composed of a wheel 22, a worm gear 23 engaged with the worm wheel 22, and a servo motor 24 for rotating the worm gear 23 in both forward and reverse directions. It is fixed at a position offset (eccentric) from the axis 02 by a required distance. Therefore, although the rocker arm 2 is provided so as to be rotatable about its pivot 1, during maintenance and inspection, etc., the worm wheel 2
When the rotary shaft 2 is rotated, the pivot shaft 1 fixed to the rotary shaft 20 is eccentrically rotated about the axis 02 of the rotary shaft 20.

Note that the reference numeral 25 in the figure indicates a coupling provided between the worm gear 23 and the servo motor 24.

In the configuration of the above embodiment, when the rocker arm is swung about its pivot 1 via the driving force transmission member 3 freely connected to the one end connecting portion 6 side of the rocker arm 2, the other end connecting portion 6 is rotated. A sliding member freely connected to the 8 side,
That is, the movable upper die 4□ can be moved up and down and back and forth.

Therefore, in this case, the functions and effects known as a so-called rocker arm type power press can be obtained.

In addition, if an abnormality occurs in the upper and lower molds 42 and 11, for example, when a workpiece is molded defectively, work to remove it or maintenance and inspection of the upper and lower molds, etc. By operating the servo motor 24 in the automatic adjustment mechanism 5 described above, the movable upper mold 42 can be moved upward to an upper position where such work can be easily performed, as shown in FIG. It is possible.

That is, when the servo motor 24 is operated, the worm gear 2
3 and the worm wheel 22 engaged therewith rotate. When the worm wheel 22 rotates, the pivot 1 of the rocker arm 2, which is fixed at a position eccentric to the axis 02 of the rotating shaft 20, rotates eccentrically about the axis 02. At this time, the rocker arm 2
Since the flexible connecting portion 6 between one end and the driving force transmitting member 3 is in a fixed state, the rocker arm 2 uses the one end connecting portion 6 as a fulcrum and the other end connecting portion 8 rotates. Become.

Therefore, by rotating the other end connecting portion 8 side of the rocker arm 2, the movable upper die 4□ is moved to the normal stroke L.
Since the mold 4211 can be raised to an upper position where it is longer than the mold 4211, it is possible to easily and quickly obtain a space between the upper and lower molds 4211 where maintenance and inspection can be easily performed.

Further, by rotating the servo motor 24 in forward and reverse directions, the vertical position of the movable upper die 4□ can be arbitrarily and easily set. Therefore, fine adjustment of the stroke of the movable upper die 4□ can be done efficiently and reliably.
This is something that can be done easily.

The present invention is not limited to the embodiments shown in the above-mentioned embodiments, and can be modified and selected as necessary without departing from the spirit of the present invention. .

That is, although the example diagrams are explained in relation to some medium- and small-sized press machines equipped with a device that automatically adjusts the mounting position of the sliding member, It is clear that this method can be applied to processing machinery that uses

For example, for electronic components with a lead frame in which an IC on the lead frame is sealed and molded with a resin material, unnecessary parts such as tie bars on the lead frame are cut and removed.
In addition, the outer lead is bent into a predetermined shape to produce a product, but it can also be suitably applied to press machines equipped with dies for cutting or bending such small workpieces. It is possible.

〔Effect of the invention〕

When the automatic adjustment device of the present invention is used in a medium-sized or small-sized press machine, etc., even in the event of an abnormality in the mold, the workpiece can be taken out and discharged without removing the mold from the machine, and the This has excellent practical effects in that maintenance and inspection work can be carried out.

Therefore, in the past, the overall production efficiency was lowered due to the large amount of work required to remove the mold from the machine, reinstall it, and make fine adjustments to the stroke and other details during the reinstallation process. An automatic adjustment device for the mounting position of sliding members that can efficiently and reliably eliminate the adverse effects of
Moreover, it has excellent practical effects such as being able to provide a press machine.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing the main parts of a press machine equipped with an automatic adjustment device according to the present invention. FIG. 2 is a partially cutaway plan view showing the main parts of the press machine. FIG. 3 is a partially cutaway front view of the main part of the automatic adjustment device of the present invention for explaining the operation thereof. FIG. 4 is a partially cutaway front view of the main parts of the press machine, showing the operating state of the automatic adjustment device of the present invention. [Explanation of symbols] 1...Pivot 2...Rocker arm 3...Driving force transmission member 31...Connecting rod 32...Pivot pin 4...Sliding member 41...Shank 42...Movable upper die 5...Automatic adjustment mechanism 6...Connection part 7...Vertical reciprocating driving force 8...Connection part 9...Connection member 9I...Link 92 - Pivot pin 93 ... Pivot pin 10 ... Vertical reciprocating motion 11 - Fixed lower die 12 ... Guide member 13 ... Spring 20 ... Rotating shaft 21 ... Bearing 22 ... Worm wheel 23 ... Ohm gear 24...Servo motor 25...Coupling 01...Shaft center 02...Shaft center

Claims (2)

[Claims] (1) A rocker arm rotatably pivoted about a pivot, a driving force transmitting member freely connected to one end of the rocker arm, and a sliding member freely connected to the other end. In a press machine or the like configured to reciprocate the sliding member by swinging the rocker arm, the rotating shaft of the worm wheel is fixed to the pivot of the rocker arm, and the axis of the pivot is fixed to the pivot of the rocker arm. An automatic adjustment device for the mounting position of a sliding member, characterized in that the center and the axis of the rotating shaft are eccentric, and a worm gear is engaged with the worm wheel. (2) a rocker arm rotatably pivoted about a pivot; a driving force transmitting member freely connected to one end of the rocker arm; a sliding member freely connected to the other end; Equipped with an automatic adjustment mechanism for the sliding member mounting position,
The press machine is configured to reciprocate the sliding member by swinging the rocker arm, and the automatic adjustment mechanism for the mounting position of the sliding member rotates the rotation of the worm wheel around the pivot of the rocker arm. A press machine characterized in that the shaft is fixed, the axis of the pivot shaft and the axis of the rotating shaft are eccentrically arranged, and a worm gear is engaged with the worm wheel.