JPH0938796A - Exchanger for tool set of powder molding press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an exchanger with which the work to attach and detach tool sets for exchange to and from a powder molding press body is easily and accurately carried out and which allows the prepn. of these tool sets for exchange as many as possible and does not require the attachment and detachment of a hydraulic piping. SOLUTION: The exchanger for exchanging and using the tool set attachably and detachably mounted at the central part of the powder molding press body by adequately selecting tool set from the plural previously prepd. tool sets is provided with a turning stage 3 freely turnable on the extension line of the approximately central part C1 of the press body 2 as a turning center C2 in the form that the outer peripheral side comes into proximity with the press body 2 behind the press body 2. The plural tool sets 7 which are made horizontally movable back and forth in a radial direction by a rectilinear moving mechanism 32 are respectively placed on the prescribed positions on the outer peripheral side on this rotary stage 3 and the rotary stage 3 is turned by rotational driving and positioning means. The rotary stage is stopped where the positions for placement of the respective tool sets 7 turn to the exchange position where the turning center C, and the approximately central part C1 of the press body are linked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool set exchanging device used for exchanging and using a tool set corresponding to various products molded by a powder molding press.

[0002]

2. Description of the Related Art As a tool set (die set) exchanging device of this type, for example, Japanese Patent Publication No. 55-24399 and Japanese Patent Laid-Open No. 4-23120 previously proposed by the applicant of the present application.
There is one disclosed in Japanese Patent Publication No. 0. In the former tool set exchanging device, a support box for mounting the tool set is provided at the tip of each of a plurality of swingable arms with respect to the press body. After moving to the position, the tool set on the support box is pushed into the press body using a hydraulic cylinder, so that the tool set is mounted at the center position of the press body. With this exchange device, it is easy to alternately attach the tool sets placed on the respective support boxes to the press body,
On the one hand, while the tool set is mounted on the press body for operation, on the other hand, a simulator etc. is used to make preliminary adjustments such as centering and checking of the replacement tool set for immediate replacement. You can prepare in.

However, in the case of this exchanging device, the tool set is moved to the center position of the press body while it is still mounted on the support box, and the fluid pressure pipe line for driving the tool set is still connected. It was hard to fit in to move with. Therefore, in the latter exchange device, in order to solve the former problem described above, the arm length is set so that the turning radius on the distal end side overlaps with the installation position of the press main body on the arm shaft erected at a proper position laterally of the press main body. The set swing arm's proximal rotation cylinder is pivotally fitted so that it can swing freely, and a support box on which the tool set is placed is provided at the tip of this swing arm, and the tool set is pressed by the swing arm's rotation. A fluid pressure pipe connected to the center part of the main body, a tool set mounted on the support box is detachably arranged in the press main body, and a fluid pressure pipe extending from a working fluid pressure source and a fluid pressure pipe connected to the tool set. The road
Connection is made in the vicinity of the arm shaft through a joint means such as a rotary joint that follows the rotation of the swing arm.

[0004]

In the case of these conventional tool set exchanging devices, since the tool box is attached to the center of the press body while being swung about the arm shaft as a fulcrum, the swing arm is bent. Since the center of the tool set and the tool set is easily displaced from the press main body, there are problems that the mounting cannot be easily performed, and that readjustment work may take time to improve the positioning accuracy after the mounting. Also, if the turning stroke is shortened to minimize the space for installing the replacement device, etc., the replacement tool set will be the closest distance to the press body. There was a problem that it became difficult to perform the work of while the press was operating. In addition, in order to efficiently manufacture molded products of various shapes and sizes, prepare a large variety of tool sets suitable for them in advance, select the desired tool set from among them, and quickly replace it. Although it is desirable to be able to use it, it is theoretically possible to equip a total of four support boxes by installing arms on the left and right sides of the front and rear sides of the press body as in the conventional exchange device. However, since it is necessary to secure the front side of the press main body as a working space where various devices necessary for taking out the molded product, measuring the size and weight, and collecting the cargo are secured, two units are actually installed on the rear side of the press main body. In addition to equipping a support box, one of them needs to be left empty so that it can be used when ejecting a tool set that is in operation. Set of tools for the exchange only to the box so that is prepared.
As a result, it is impaired to quickly exchange and use the necessary tool set according to the product. For example, two types of products with standard specifications are always pressed alternately, while a prototype or a product with special specifications is temporarily suspended. It is not possible to deal with cases such as when pressing manually. Therefore, it is an object of the present invention to provide a tool set changing device in a powder molding press that can solve the above-mentioned problems of the conventional techniques.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a tool set detachably attached to the center of a powder molding press body,
In an exchanging device for exchanging and appropriately selecting from a plurality of tool sets prepared in advance, in the rear part of the press body, the outer peripheral side is the center of rotation on the extension line of the substantially central part of the press body. A rotary mounting table is provided that can rotate (rotate or swing) in the vicinity of the press body, and can be horizontally reciprocated in the radial direction by a linear motion mechanism at a predetermined position on the outer peripheral side of the rotary mounting table. A plurality of such tool sets are respectively mounted, and the rotary mounting table is rotated by the rotation driving / positioning means, and the mounting position of each tool set is an exchange position connecting the rotation center and the substantially central portion of the press body. It was stopped when it turned to.

In a preferred embodiment, the rotary mounting table is formed in a circular or circular shape on which at least three or more tool sets are mounted. The rotary mounting table is pivotally supported on the rotary support shaft about a rotary support shaft standing on the base, and the flow path connected to the hydraulic source side pipe is connected to the rotary support shaft. And a rotary cylinder that rotates in conjunction with the rotary mounting table is mounted on the outer periphery of the rotary support shaft, and one end of the rotary cylinder communicates with the flow path of the rotary support shaft. A flow path whose other end is connected to the pipe on each of the tool sets is formed, and a rotary joint is formed by the rotation support shaft and the rotation cylinder. A manifold unit equipped with a slide expansion joint for supplying and draining oil to and from each of the tool sets is provided on the inner peripheral side of the rotary mounting table, and this slide expansion joint is partially attached to the rotary joint side. It is composed of a hydraulic chamber that is in communication and is formed in an elongated shape in the horizontal direction, and a slide cylinder that is slidably mounted so that the tip end side is connected to each of the tool sets and penetrates the hydraulic chamber. The cylinder has an intermediate portion communicated with the hydraulic chamber and has a tip end opened so as to be connected to the pipe on each tool set side.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tool set exchanging device for a powder molding press according to the present invention will be described in detail below with reference to FIGS. The exchange device 1 is
As shown in FIGS. 1 to 3, a rotary mounting table 3 is provided on the rear side of the press main body 2 on which the tool set is mounted, and the rotary mounting base 3 has a press center C of the press main body 2. It is configured such that it is rotated about the rear extension line of ₁ as a rotation center C ₂ and at least three or more tool sets can be mounted on the rotation mounting table 3. The rotary mounting table 3 is rotatably fitted to a rotary support shaft 5 which is a rotation center C ₂ erected on a base 4 via a bearing member 3a and has a bottom portion. Is equipped with a roller 6 that rolls on a base 4, and the rotary mounting table 3 is driven by an arbitrary rotary drive.
The desired tool set is rotated by the positioning means so that it can be stopped at the exchange position located on the axis connecting the press center C ₁ and the rotation center C ₂ .

As the rotation driving / positioning means for the rotary mounting table 3, not only various control motors including, for example, a servo motor and a stepping motor but also known techniques such as gear or belt drive or expansion / contraction of a cylinder are appropriately used. It is continuously or intermittently driven to rotate in the forward or reverse direction. In the rotary mounting table 3 in the embodiment shown in FIG. 1, tool sets 7A, 7B and 7C are mounted on a circular plate surface at positions of an opening angle of 45 degrees, and a maximum of 8 tool sets can be replaced. In another embodiment shown in FIG. 2, the tool sets 7A, 7B, and 7C are placed on the circular plate surface at an opening angle of 45 degrees, and three tool sets are used. The rotation mounting shaft 5 is intermittently oscillated and rotated in the forward rotation or the reverse rotation direction with the rotation support shaft 5 as the rotation center to select one of the tool sets. .

A rotary cylinder 9 is slidably fitted on the outer periphery of the rotary support shaft 5. In this embodiment, the rotary support shaft 5 and the rotary cylinder 9 are hydraulic pressures for each tool set. A rotary joint 8 that constitutes a part of the pipeline is configured. This rotary joint 8 is based on the previously proposed JP-A-4-231.
Similar to the one used in the exchange device of No. 200, one end of the rotation support shaft 5 is opened at the upper end surface and the other end is opened at the outer peripheral surface. A hole 11 is bored, and one end of the rotating cylinder 9 is communicated with the oil supply communication hole 10 and the oil discharge communication hole 11 by annular grooves 12 and 13 having one end opened to the inner peripheral surface. A communication hole 14 for oil supply and a communication hole 15 for oil discharge, which are opened at the other end on the outer peripheral side, are formed, and even if the rotating cylinder 9 slides and rotates, the communication hole 10 and communication hole 14 for oil supply and the discharge hole 14 The oil communicating hole 11 and the oil communicating hole 15 are always connected to each other. A seal member 16 such as an O-ring is attached at an appropriate position of the sliding rotation portion of the rotation cylinder 9 with respect to the rotation support shaft 5.

On the outer periphery of the rotary cylinder 9, each tool set 7 is provided.
A manifold unit 18 accommodating hydraulic lines for supplying or discharging hydraulic pressure to A, 7B, and 7C is arranged, and this manifold unit 18 is mounted on the rotary mounting table 3 via mounting leg portions 19. The manifold unit 18 is fixed, and the communication hole 14 and the communication hole 1 of the rotary cylinder 9 are fixed.
5 are connected by relay pipes 20 and 21. The manifold unit 18 includes slide expansion joints 22 and 23 as shown in detail in FIG. 5 in which one set for oil supply and the other for oil discharge are used as many as the number of tool sets (three sets in the embodiment). It is provided.

The slide expansion joints 22 and 23 are elongated hydraulic chambers 24 and 2 formed in the manifold unit 18.
5 and a slide cylinder 26 or a slide cylinder 27 slidably mounted so as to penetrate through the hydraulic chambers 24 and 25 along the longitudinal direction. The hydraulic chambers 24 and 25 are connected at their intermediate portions to the relay pipes 20 and 21, respectively, and seal members 28 and 2 such as O-rings are provided on the inner peripheral surfaces of both ends of the opening.
8 is mounted, and the slide cylinders 26 and 27 slide on the inner peripheral surfaces of the seal members 28 and 28. Slide tube 26,
27 is a cylindrical body having a closed proximal end and an open distal end,
The open tip side is connected to the tool set 7, and the communication hole 2 that opens into the hydraulic chambers 24 and 25 is provided in the middle part.
9, 30 are drilled. Slide expansion joint 22,2
When the tool set 7 is moved forward or backward by a rectilinear motion mechanism described later, the slide cylinders 26 and 27 follow the horizontal movements of the tool set 7 for horizontal reciprocating motion and always for refueling and draining with the tool set 7. It is for holding the hydraulic line for use in a connected state.

The tool set 7 is provided with traveling rollers 31 on both side surfaces on the bottom side so as to be movable on the rotary mounting table 3, and the operating position mounted in the press main body 2 and the rotary mounting table 3 are mounted. In this embodiment, as a rectilinear motion mechanism for moving forward or backward with respect to the standby position, the tip of the piston rod is fixedly mounted on the rotary mounting table 3 and the tool set 7 is used.
The transfer cylinder 32 fixed to the back surface of the lower end side of the is used. As shown in FIGS. 3 and 6, the tool set 7 is a locking member for moving horizontally and being detachably mounted at the center position of the press body 2, and has an upper ram 33 on the upper end side.
The punch plate 35 is provided with an upper locking member 34 which is fitted to the lower plate 36, and the lower plate 37 is provided with a lower locking member 37 which is fitted to the lower ram 36 at the lower end side. Servo solenoid valves 39 and 40 for hydraulic control for driving a cylinder in the tool set via a connection port are attached to the center rear surface side of the tool set 7, and these servo solenoid valves 39 and 40 are connected via piping. Slide expansion joints 22, 2
Connected to 3. In this embodiment, since two cylinders are used in one tool set, two servo solenoid valves and two pipes for driving the cylinders are used, but a product having a complicated shape is formed. In some cases it will be increased accordingly. Further, a clamp mechanism 41 for fixing and holding the tool set 7 via a transport roller 31 is provided on the press body 2 side, and this clamp mechanism 41 is the same as that disclosed in JP-A-4-231200. Therefore, detailed description will be omitted.

In the hydraulic system for supplying or discharging oil to the tool sets 7A, 7B, 7C, the piping from the hydraulic pump of the hydraulic power source device 42 constitutes the rotary joint 8 as shown in the system diagram of FIG. The piping on the other side of the rotary joint 8 which is connected to the oil supply port P of the rotary support shaft 5 is equal to the number of usable tool sets 7, that is, 3 in this embodiment.
The relay pipes 20 (20A, 20A)
B, 20C) and slide expansion joint 22 (22A, 22)
B, 22C) and servo solenoid valve 39 (39A, 39)
B, 39C) for each tool set 7 (7
A, 7B, 7C) are supplied with hydraulic pressure. In addition, the oil discharged from each tool set 7 (7A, 7B, 7C) is discharged from the servo solenoid valve 40 (40A, 40B, 40C).
C) and slide expansion joint 23 (23A, 23B, 23
C) and relay pipe 21 (21A, 21B, 21C)
The oil is sequentially discharged through the rotary joint 8, and the other side of the rotary joint 8 shares the pipe with the drain port R of the rotation support shaft 5
And is connected to the hydraulic tank of the hydraulic power source device 42.
Further, each of the transfer cylinders 32 (32A, 32B, 33C) used as a linear motion mechanism is provided with a solenoid valve 43 (43A, 43B, 43C) for supplying and draining oil on the other side of the rotary joint 8 via electromagnetic valves 43 (43A, 43B, 43C). Is connected to the piping for.

With respect to the exchanging device 1 having the above-described structure, as an example, as shown in FIGS. 1 to 3, the tool set 7A attached to the press body 2 is removed and replaced with the tool set 7B or the tool set 7C. explain. When the clamp device 41 holding the carrying roller 31 is lifted to release the tool set 7A from the lock of the press body 2, and the solenoid valve 43A is operated by a control device (not shown) to shorten the carrying cylinder 32A. , The upper locking member 34 is the upper ram 33 and the lower locking member 37 is the lower ram 36.
While the tool set 7A is horizontally moved toward the rotary mounting table 3 while being separated from each other, the slide expansion joint 22A in the extended state is also shortened in conjunction with this, and the tool set 7A is retracted. It returns to the empty original position on the rotary mounting table 3.

Next, the rotary driving / positioning means is operated to rotate the rotary mounting table 3, and either the tool set 7B or the tool set 7C is selected as a tool set for replacement and the press center C ₁ is selected. Stop at an exchange position on the axis connecting the rotation centers C ₂ . In addition, these toolset 7B
Alternatively, the tool set 7C is preliminarily subjected to necessary preliminary adjustment such as centering adjustment on the rotary mounting table 3 by using a simulator or the like while the tool set 7A mounted on the press body 2 is in operation. The tool set for exchange, for example, the tool set 7C, moves the press cylinder C while horizontally moving on the axis connecting the press center C ₁ and the rotation center C ₂ when the solenoid valve 43C is operated to extend the transfer cylinder 32C. C ₁
And the upper and lower locking members 34 and 37 move to the upper and lower rams 3.
Since it is fitted to 3, 36, the clamp device 4 in this state
1 is used to fix the tool set 7C to the press body 2.

The present invention is not limited to the above embodiments, but various modifications can be made within the scope of the invention. For example, in the embodiment, three tool sets are mounted on the rotary mounting table, but there is also a mode in which there are two tools, and a maximum of eight tools can be arranged radially at the same intervals as in the embodiment. It is possible to increase the number of replaceable tool sets, and in place of the hydraulic cylinder used as the linear motion mechanism for transporting the tool set in the embodiment, for example, various known linear motion mechanisms such as a rack and a binion or a feed screw mechanism. It is also possible to use a well-known rotating or swinging motion mechanism such as a worm gear, a pulley, or a swinging motor as means for rotating and driving the rotary moving base. Regarding the processing of hydraulic piping, there is no concern about entanglement when a small tool set is oscillated and rotated in place of the rotary joint, as disclosed in JP-A-4-231200. It is also possible to connect individually near the center of rotation in the same manner as above, and the slide expansion joint is omitted and a length is provided so that it can follow the movement between the manifold unit and each tool set. There is also a mode of directly connecting in the state.

[0017]

As is apparent from the above embodiments, the tool set exchanging device according to the present invention can achieve the following effects. In the exchanging device according to the first aspect, the tool set can be accurately and easily attached and detached while linearly reciprocatingly moving the tool set to and from the rotary mounting table provided on the rear portion of the press body, and the core after mounting Readjustment such as putting out is also minor and can be done in a short time. Further, the front part and both side parts of the press body can be secured as a work space in which each device necessary for taking out the molded product, measuring the size and weight, and collecting the product is provided. In addition, loading and unloading of the tool set to and from the press body can be easily performed with a short stroke due to linear reciprocating motion, and other replacement tool sets other than the replacement position are sufficiently separated from the press body. Therefore, pre-adjustment and other operations for the tool set can be performed more easily and safely than ever before without being affected by the press in operation. Claim 2
With the replacement device according to, it is possible to place three or more replacement tool sets on the rotary mounting table. Therefore, pre-adjust multiple tool sets suitable for molded products of various shapes and sizes. It is possible to select a desired tool set from among them and quickly exchange it for efficient production. In the exchanging device according to the third and fourth aspects, the hydraulic pipes for driving a large number of tool sets can be processed without being entangled by following the operation while the tool sets are connected.

[Brief description of drawings]

FIG. 1 is a plan view of a tool set changing device according to an embodiment of the present invention.

FIG. 2 is a plan view of a tool set changing device according to another embodiment of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 1;

FIG. 4 is a sectional view taken along line YY of FIG. 1;

FIG. 5 is an enlarged vertical sectional view of an essential part for explaining the operation of the slide expansion joint.

FIG. 6 is a sectional view taken along line ZZ of FIG. 1;

FIG. 7 is a system diagram illustrating a hydraulic pipe configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exchanger 2 Press main body 3 Rotating mounting base 4 Base 5 Rotating support shaft 6 Rollers 7, 7A, 7B, 7C Tool set 8 Rotary joint 9 Rotating cylinders 10, 11, 14, 15, 29, 30 Communication holes 12, 13 Annular groove 16, 28 Seal member 18 Manifold unit 19 Mounting leg portion 20, 20A, 20B, 20C Relay pipe 21, 21A, 21B, 21C Relay pipe 22, 22A, 22B, 22C Slide expansion joint 23, 23A, 23B , 23C slide expansion joint 24, 25 hydraulic chamber 26, 27 slide cylinder 31 traveling roller 32, 32A, 32B, 32C transport cylinder 33 upper ram 34 upper locking member 35 punch plate 36 lower ram 37 lower locking member 38 pull-down plate 39, 39A, 39B, 39C Servo solenoid valve 40, 40A , 40B, 40C Servo solenoid valve 41 Clamp mechanism 42 Hydraulic source device 43, 43A, 43B, 43C Solenoid valve

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[Procedure amendment]

[Submission date] September 6, 1995

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

[Procedure amendment 2]

[Document name to be amended] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction contents]

FIG. 7

Claims (4)

[Claims] 1. An exchanging device for exchanging a tool set, which is detachably attached to a central portion of a powder molding press body, from a plurality of tool sets prepared in advance and exchanging the tool set. In the rear part of the press main body, there is provided a rotary mounting table which is rotatable (rotatable or swingable) around the extension line of the substantially central part of the press main body so that the outer peripheral side is close to the press main body. A plurality of tool sets that can be horizontally reciprocally moved in the radial direction by a linear motion mechanism are respectively mounted at predetermined positions on the outer peripheral side of the movable mounting table, and the rotary mounting table is rotated by the rotation drive / positioning means. An apparatus for exchanging a tool set in a powder molding press, which is stopped when a mounting position of each tool set is rotated to an exchange position connecting a rotation center and a substantially central portion of a press body. 2. The tool set exchanging device in a powder molding press according to claim 1, wherein the rotary mounting table is formed in a circular or circular shape on which at least three or more tool sets are mounted. 3. The rotary mounting table is pivotally supported on the rotary support shaft about a rotary support shaft that is erected on the base, and the rotary support shaft is connected to a pipe on the hydraulic pressure source side. A flow tube to be connected is formed, and on the outer periphery of the rotary support shaft, a rotary cylinder that rotates in conjunction with the rotary mounting table is mounted, and one end side of the rotary cylinder is the flow of the rotary support shaft. The flow path communicating with the path and having the other end connected to the pipe on the tool set side is formed, and the rotary joint is formed by the rotary support shaft and the rotary cylinder. Tool set changer for powder molding press. 4. A manifold unit equipped with a slide expansion joint for supplying and draining oil to and from each of the tool sets is provided on the inner peripheral side of the rotary mounting table, and the slide expansion joint is partially formed. A hydraulic chamber that is communicated with the rotary joint side and is formed in an elongated shape in the horizontal direction, and a slide cylinder that is slidably mounted so as to penetrate the hydraulic chamber by connecting the tip side to each of the tool sets. This slide cylinder has an intermediate portion communicating with the hydraulic chamber,
The tool set changing device in the powder molding press according to claim 3, wherein the tip side is opened and is connected to the pipe on each tool set side.