JPS6227305Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a continuous multi-stage former that sequentially presses metal products such as bolts, nuts, or various parts using multiple punches and dies arranged in multiple stages. In particular, it relates to a device that fully automatically performs a series of operations from extraction to installation in the event that the punches, dies, and other tools necessary for this former are worn out and damaged, making it possible to replace them with new tools unattended. .

Conventional Technology and Problems A device in which tools such as punches and dies can be automatically changed by installing an automatic tool changer in a multi-stage former has already been made generally available in Japanese Patent Laid-Open Publication No. 102337/1983. However, the known devices are generally large in size and have very complicated mechanisms, and therefore have problems in that they are expensive and impractical. In addition, during replacement work, the operation of the machine is stopped, but the worker sometimes gets close to the area around the movable ram, which cranks with great force, or inserts his/her hand deeply. It would be extremely dangerous if the machine were to start moving, and improvements were strongly requested from a safety standpoint.

Technical Issues In order to solve this problem, this invention is designed to extract all tools such as punches, dies, and other tools of different shapes using a single piece of chuck and transport them to the stocker installed on the machine base, and at the same time remove them from the stocker. The desired purpose can be achieved with a simple accessory device by allowing a new tool to be grabbed and returned to its original position, and the die-stitcher can also be installed in a dangerous zone on the machine to prevent workers from entering. It is designed to increase safety by protecting it with a die striker.

Embodiments The details of embodiments shown in the drawings will be described below.

Dive block 1 has a plurality of dice 2 in a row horizontally.
2, and a quill 5 for cutting the material wire 10 to a predetermined size with a movable knife 9 is disposed closest to the side of the die, and the die 2 and the quill 5 are inserted and held freely in and out. Dice 2 and quill 5 are clasp 1
1.12, but when replacing the lock, the lock is released by linear or rotational movement by actuation of an air cylinder 13.14.

The punch 4 is a punch case 1 at the front end of the movable ram 3
5 and is similarly fixed with a clasp 16,
At the time of replacement, the engagement is released by an air cylinder 17. Punch and die clasp 12.16 is rack 18.19 and pinion 2
0.21, and when the rack moves, the catch 12.16 rotates by a predetermined angle together with the pinion to release the engagement.

The material wire 10 protrudes forward from the tip end of the quill 5 and is received by a stopper 22 to be regulated to a predetermined size. However, this stopper 22 also needs to be replaced, and when replacing it, the stopper 24 is pulled in by the operation of the air cylinder 23. It is designed so that it can be disengaged by moving it.

The die stock picker 6 is formed into a box-frame shape stacked in several tiers, one above the other, and is capable of horizontally inverting and swinging around a pivot 6a at the base end as a fulcrum, so that the stocker 6 of the necessary tier can be moved in accordance with the next operation. This is to make them stand in a fixed position so that they can wait.

This die striker 6 has 2 dice and 4 punches.
It is configured so that a set of tools that require replacement, such as the quill 5 or the stopper 22, can be arranged and equipped.

The tool transport device 8 includes a frame-shaped fixed rail 26 provided over the upper surface of the approximately central portion of the machine body 25 and a running platform 2 that can move in the left-right direction along the rail 26.
7, a transverse table 28 that can slide on the traveling table in the front-back direction orthogonal thereto, and an elevating table 29 that is attached to this transverse table 28 and moves up and down.
Therefore, the chuck piece 7 is attached to this elevating table 29 so as to hang down, and the chuck piece 7 is attached to the elevating table 29 so as to hang down. The chuck piece 7 is moved to any position by integrating the movements in the left and right and up and down directions to change the tool.

This chuck piece 7 is a pair of left and right pieces that can freely move left and right to expand and contract around a pivot 7d at the upper end. Traveling platform 27, traversing platform 28, and lifting platform 2
Reference numeral 9 moves by driving a motor (not shown) provided in each. In addition, the expansion and contraction movement of the chuck piece 7 is performed by a power cylinder such as an air or hydraulic power cylinder,
It is operated by a motor or electromagnet.

Operation When exchanging the die 2 or the punch 4, first, the operation of the machine is stopped and the chuck piece 7 is moved directly above the target die by the tool conveying device 8.

If the clasp 12 of the die 2 is released in advance, the die 2 can be extracted from the die block 1 by grasping the die 2 at the same time as the chuck piece 7 is lowered and moving it forward. The extracted die 2 is carried onto the die stocker 6 by the tool conveying device 8 and stored in a predetermined position. Then, by taking out a new die from the die stocker 6, carrying it onto the previously extracted die block 1, pushing it forward from a predetermined position, and resetting the stopper 12, all replacement work can be performed fully automatically.

When gripping the die 2 and the punch 4, use the gripping portion 7a formed by the large arc portion at the top of the chuck piece 7 to grip the neck portions 2a and 4a of the die and punch, and in the case of the movable knife 9. is removably fitted into the fitting part 30a of the knife holder 30 by gripping the annular groove part 9a using the gripping part 7b of the intermediate small circular arc part. Also Quill 5 and Stopper 2
In the case of 2, the gripping part 7c is formed by the prongs at the lower end.
Use them to hold it in place.

The side of the machine between the punch and the corresponding die is a convenient place for workers to climb into the top and monitor the work status and control the operation of the machine. However, if a die striker 6 is installed in this most dangerous position and used as a barrier to the punch operation part, Safety will be significantly improved.

Effects As described above, the present invention has a pivot 6 on the side upper surface of the machine body 25 so that the die stock picker 6 that accommodates and holds the tool is placed directly above the tool and covers the dangerous zone.
The chuck device is provided with a pair of chuck pieces 7.7 facing each other so as to be expanded and contracted by a driving device, and a punch 4 is attached to the chuck piece 7.7. Alternatively, a punch gripping portion 7a consisting of a large arc portion that grips the neck portion 2a. Since the quill gripping parts 7c consisting of protruding claws are formed at different upper and lower positions, the die stock picker 6 can be used to protect the dangerous zone of the machine body 25 and cover the highly dangerous punch operating part of the multi-stage former. In addition to increasing safety,
All tools of different shapes and sizes, such as punches, dies, quills, or movable knives, used in a multi-stage former can be gripped by a single chuck piece, so that each tool can be moved between the die stock picker and the tool for reliable replacement. The structure is simple and can be implemented at low cost without having to prepare many types of dedicated chucks or changing or replacing them.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the entire home machine implementing the device according to this invention, Fig. 2 is a front view taken from the line A-A in Fig. 1, Fig. 3 is an enlarged plan view of the main parts, and Fig. 4
5, 6 and 7 are front views showing the operating state of the chuck piece. DESCRIPTION OF SYMBOLS 1...Die block, 2...Die, 3...Moving ram, 4...Punch, 5...Quill, 6...Die stock picker, 7...Chuck piece, 8...Tool transport device, 6a...Pivot, 7a ...Punch gripping part,
7b...knife gripping part, 7c...quill gripping part.

Claims (1)

[Scope of utility model registration request] A fixed rail 26 is provided in a frame shape so as to straddle the machine body 25, and tools such as the punch 4, die 2, quill 5, etc. are moved from their respective mounting positions to between the die stock picker 6 and transferred by being guided by the rail. It is a multi-stage home machine equipped with a tool conveying device 8 for holding tools and a chuck device for holding tools, and the die stock picker 6 is placed directly above the tools with a pivot 6a as a fulcrum on the upper side of the body 25 so as to cover the critical zone. The chuck device is provided with a pair of opposing chuck pieces 7.7 so as to be reversible and swingable in the horizontal direction, and the chuck pieces 7.7 are provided with a pair of chuck pieces 7.7 facing each other so as to be expanded and contracted by a drive device. Punch gripping part 7 consisting of a large circular arc part that grips the neck part 2a.4a
a, a knife gripping portion 7b consisting of a small arc portion that grips the annular groove portion 9a of the movable knife 9, and a quill gripping portion 7 consisting of a prong that grips the quill 5 or the stopper 22.
An automatic tool changer in a multi-stage former, characterized in that the tool changer is formed at different upper and lower positions.