JPH0321768Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention consists of an upper turret supporting a large number of punches and a lower turret supporting a large number of dies corresponding to the punches, which are vertically opposed to each other. This invention relates to a turret punch press equipped with a turret punch press.

(Prior art) A turret punch press consists of an upper turret in which a large number of punches are arranged and supported in the circumferential direction near the outer periphery of a disk, and a lower turret in which dies corresponding to the punches are supported, which are vertically opposed and rotated. Ready to move freely,
In addition, it is equipped with a ram that is equipped with a striker at the bottom that presses the punch and is movable up and down, and a work clamp that grips a plate-shaped work to be processed by the punch and die in the X-axis and Y-axis directions. It is prepared so that it can be moved freely.

In order to support more punches and dies on the upper and lower turrets, a configuration has been developed in which the punches and dies are arranged not only in the circumferential direction but also in the radial direction of the upper and lower turrets. In this configuration, it is easy for the work clamp to approach the radially outer punch and die, but it is not easy to approach the radially inner punch and die. Therefore, in the past, the distance between the upper and lower turrets was made relatively large so that the tip of the work clamp could enter so that the work clamp could get as close as possible to the inner punch and die. It has been formed.

(Problems to be Solved by the Invention) When the distance between the upper and lower turrets in a turret punch press is large, the length of the punch protruding from the lower surface of the upper turret becomes large. The downwardly protruding portion of this punch is not guided by the upper turret. Therefore, there is a problem in improving the guide accuracy of the punch.

Note that if the distance between the upper and lower turrets is reduced in order to improve the guide accuracy of the punch, there is a problem that the tip of the work clamp cannot enter between the upper and lower turrets.

[Structure of the invention] (Means for solving the problem) In view of the above-mentioned conventional problems, the present invention has the following features:
When the distance between the upper and lower turrets is reduced, a step portion is formed near the outer periphery of the lower surface of the upper turret into which the tip of the work clamp can enter.

(Function) With the above configuration, the guiding accuracy of the punch located in the stepped portion is on the same level as the conventional one, but
The guiding accuracy of the punch located inside the stepped portion is improved compared to the conventional one.

(Example) First, the overall structure of a turret punch press will be described.

As shown in Fig. 1, the turret punch press 1
Reference numeral 9 includes a disc-shaped upper turret 3 which supports a large number of punches 1 (see FIGS. 2 and 5) in a vertically movable manner and is rotatably mounted on the upper frame 21 via an upper shaft 23. A lower turret 7 supporting a large number of dies 5 (see FIG. 2) corresponding to the number of dies 5 (see FIG. 2) is rotatably supported by a lower frame 25 via a lower shaft 27.

In order to move and position the plate-shaped workpiece 11 processed by the punch 1 and die 5 in the X-axis and Y-axis directions, a carriage base 31 that can be moved and positioned in the Y-axis direction is provided on the lower frame 25. A carriage 33 is supported on the carriage base 31 and is movable and positioned in the X-axis direction. A work clamp 13 for gripping the work 11 is attached to this carriage 33.

Further, in order to apply force to the punch 1, the upper frame 21 is provided with a ram 9 having a striker (not shown) at its lower part so as to be moved up and down by an eccentric mechanism 29.

Since the turret punch press 19 having the above configuration is well known, a more detailed explanation will be omitted.

As shown in FIGS. 2 to 5, in this embodiment, a stepped portion 17 is formed near the outer periphery of the lower surface of the upper turret 3. As shown in FIGS. In other words, the upper turret 17 has a thinner wall around the outer circumference 45 and a thicker inner wall 49, and the lower surface of the inner wall 49 is closer to the upper surface of the lower turret 7 than in the past. It is.

As can be understood from FIGS. 3 to 5, the punch 1 is attached to the outer peripheral portion 45 and the inner portion 49, respectively. In addition, punch 1
As shown in FIG. 2, this is fitted into a cylindrical plate holder 35 that is vertically movably supported on the upper turret 3, and the connection between this plate holder 35 and the punch head 37 of the punch 1 is A stripper spring 39 is loaded between them. Further, the die 5 corresponding to the punch 1 is arranged above the through hole 41 formed in the lower turret 7, and a work support stand 43 for supporting the work 11 is arranged near the axis inside the die 5. It is provided. Further, the lower turret 7 is provided with a chamfer 47.

In the above configuration, the work clamp 1
3 in the X and Y axis directions, and after positioning the work 11 between the punch 1 and the die 5, the work 11 is processed by lowering the ram 9 and applying pressure to the punch 1. It is.

By the way, among the punches 1 arranged in the radial direction, the inner punch is used to clamp the workpiece 1.
3, the tip 15 of the workpiece clamp 13 can enter the step 17 of the upper turret 3, as shown in FIG.

That is, even when the lower surface of the upper turret 3 is brought close to the upper surface of the lower turret 7 in order to improve the accuracy of the guide portion of the punch 1, the tip of the work clamp 13 must be brought close to the punch 1 on the inside. It is something that can be done.

[Effects of the invention] As can be understood from the description of the embodiments above, the present invention is capable of vertically moving a plurality of punches 1 in the radial direction of the upper turret 3 rotatably supported on the upper frame 21. In preparation, upper turret 3
A work clamp 13 is provided with a die 5 corresponding to the punch 1 on a lower turret 7 which is rotatably supported on a lower frame 25 facing the turret 7, and which grips a work 11 to be processed by the punch 1 and the die 5.
The upper turret 3 supports a stepped portion 17 into which the tip of the work clamp 13 can enter near the outer periphery of the lower surface of the upper turret 3. It is provided over a position on the inside of the outer punch in the radial direction.

As is clear from the above structure, in the present invention, a stepped portion 17 into which the tip of the work clamp 13 can enter is formed near the outer periphery of the lower surface of the upper turret 3 in the turret punch press. The lower surface on the axis side of the stepped portion 17 can be brought closer to the lower turret 5, and the length of the guide portion of the punch 1 can be made longer. Therefore, the guiding accuracy of the punch 1 is improved, and the processing accuracy by the punch and die arranged radially inside is further improved.

In other words, according to the present invention, punches and dies for processing with high precision are placed on the inside, and punches and dies for processing that require less precision are placed on the outside, making it possible to use punches and dies with different precisions. It is possible to use it.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an explanatory diagram showing the overall structure of a turret punch press, FIG. 2 is a cross-sectional diagram of the main parts, and FIG. 3 is a plan view of the upper turret. FIG. 4 is a front cross-sectional view thereof, and FIG. 5 is a cross-sectional explanatory view of the main parts. 21... Upper frame, 3... Upper turret,
1...Punch, 25...Lower frame, 7...Lower turret, 11...Work, 13...Work clamp, 17...Step part, 5...Die.

Claims (1)

[Scope of utility model registration request] A plurality of punches 1 are vertically movable in the radial direction of an upper turret 3 rotatably supported on an upper frame 21, and a lower turret 7 is rotatably supported on a lower frame 25 facing the upper turret 3. A turret punch press comprising a die 5 corresponding to a punch 1 and a work clamp 13 that grips a work 11 to be processed by the punch 1 and the die 5 and is movable in the X-axis and Y-axis directions. and a stepped portion 17 into which the tip of the work clamp 13 can enter near the outer periphery of the lower surface of the upper turret 3.
A turret punch press characterized in that it is provided over a position inside a radially outer punch supported by an upper turret 3.