JP2966393B2 - Turret punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a turret punch press for punching a work, and more particularly, to a turret punch press in which an upper turret has a smaller diameter than a lower turret.

[0002]

2. Description of the Related Art In a conventional turret punch press, an upper and lower turret is driven by one servomotor, a pair of punches and a die are arranged in one station, and a work is performed by vertically moving the punch with respect to the die. (Punching). In this case, the processing conditions such as the plate thickness are determined and set by the operator.

[0003] Whenever the clearance between the punch and the die is changed depending on the plate thickness, material, etc., the die must be replaced or another punch having the same shape is prepared, and a die having a different clearance is used. It was configured to perform press working by arranging it in a station.

[0004]

In the work of preparing and selecting a punch and a die and performing punching, it takes time to perform a selection operation and a detachment operation for determining the clearance between the punch and the die, and the work efficiency is reduced. It cannot be increased, and automation by the numerical control device is likely to be limited.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and the invention according to claim 1 is provided with an upper turret having a plurality of punches rotatably. In a turret punch press provided with a work clamp capable of rotatably including a lower turret having a plurality of dies corresponding to the respective upper punches and moving and positioning a work with respect to a punching position by the punch and the die, serial diameter of the upper turret smaller form than the diameter of the lower turret, Ri Do a structure having an open upper part of the upper surface of the lower turret, the lower turret
With the top open position between the punching position
Therefore, it is a configuration provided on the opposite side of the work clamp.

According to a second aspect of the present invention, in the first aspect, the turret shaft of the upper turret and the turret shaft of the lower turret are aligned in the Y-axis direction in which the work clamp approaches and separates from the punching position. excursion Citea is, whether to
With the above punching position in between, the upper and lower turret shafts
It is located on the opposite side of the work clamp.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1 and FIG. 2, the turret punch press 1 is composed of a portal frame in which a processing interval portion 7 is formed between a lower frame 3 and an upper frame 5.
It is almost rectangular when viewed from the front. In the machining interval section 7, work tables 11, 13 on which a free bearing 9 is disposed are provided on the upper side of the lower frame 3 on which a work W as a work material is placed so as to be movable in a horizontal direction. Also, a work clamp 15 for holding and moving the work W placed on the work tables 11 and 13, and punches P and Q for punching the work W as shown in FIGS. 3 (A) and 3 (B). , R, and a lower turret 19 in which dies P _{1 to} P ₃ , Q _{1 to} Q ₃ , R _{1 to} R _3, etc. are disposed in the processing space 7. Reference numeral 21 denotes a numerical control device as a control device provided on one side of the turret punch press 1.

As is apparent from FIGS. 1, 2 and 3, the diameter of the upper turret 17 is smaller than the diameter of the lower turret 19.

On the work table 13, a carriage base 25 which is guided by a rail 23 provided on the lower frame 3 in the Y-axis direction (left and right directions in FIGS. 1 and 2). X
There is provided a carriage 27 which is movably guided in the axial direction (vertical direction in FIG. 2). The plurality of work clamps 15 provided on the carriage 27 hold the edge of the work W from above and below, and the numerical control device 21 controls the movement of the work W to a predetermined set position.

The work table 11 is a fixed table fixed to the lower frame 3 at the center in the X-axis direction, whereas the work table 13 is located before and after this fixed table and The carriage base 25
And a moving table that moves in the Y-axis direction as a unit.

The upper turret 17 is attached to a lower end of a turret shaft 29 hanging from the upper frame 5,
Servo motor M ₁ provided on one side of this upper frame 5
Thus, the transmission is rotated via the reduction gear 31, the drive chain 33, the drive sprocket 35, and the like. As shown in FIG. 3 (A), the upper turret 17 has punches P, Q, R which are dies having the same diameter and different sizes or shapes around the turret shaft 29. Has been arranged.

A striker 39 is provided at the press center at a position above the rotational locus of each of the punches P, Q, and R by hydraulic pressure, a crank or a cam 37, and the like. The punches P, Q or R of the turret 17 are shot down.

Opposing the outer periphery of the upper turret 17,
A shot pin cylinder 41, which is operated by the drive chain 33 in conjunction with a fixed timing phase, is provided at an appropriate position.
The upper turret 17 is controlled to stop turning at a predetermined position in response to engagement by the shot pin provided in the turret.

On the other hand, the lower turret 19 has a turret shaft 43 at a position deviated leftward on a line in the Y-axis direction with respect to the turret shaft 29, and is rotatable on the lower frame 3. Is provided. The upper surface of the lower turret 19 is provided so as to be substantially flush with the work tables 11 and 13 so that the processed portion of the work W moved by the work clamp 15 can pass therethrough. The lower turret 19, by a servomotor M ₂ provided at one end of the lower frame 3, and is configured to be rotation transmission reducer 45, through a drive chain 47, and the driving sprocket 49 and the like.

As apparent from FIG. 1, the upper turret 1
The turret shaft 43 of the lower turret 19 is displaced from the turret shaft 29 with respect to the turret shaft 29 in the Y-axis direction, and the upper turret 17 has a smaller diameter than the lower turret 19. As shown in FIGS. 1 and 2, the upper space of one part has a punching position T.
The opposite side of the work clamp 15 is opened in between.

As is clear from FIGS. 1 and 2,
The lower turret shafts 29 and 43 hold the punching position T between them.
And is disposed on the opposite side of the work clamp 15.

As shown in FIG. 3B, the lower turret 19 has the same diameter about the turret shaft 43 and faces the punches P, Q, and R of the upper turret 17. die _{P 1 ~P 3, Q 1 ~Q} 3, R 1 ~R 3 , etc. are arranged. These dies P _{1 to} P ₃ form a predetermined clearance between the fitting surfaces for punching of the punch P. This clearance is, for example, P ₁
<P ₂ <P ₃ , such that the optimum clearance is set for each plate thickness depending on the material of the work W to be processed. The punch Q and the dies Q _{1 to} Q ₃ and the punch R and the dies R _{1 to} R ₃ are similarly configured.

The lower turret 19 has a turret shaft 43.
By turning around, each die P ₁ -P ₃ , Q ₁
ＱQ ₃ , R ₁ ＲR ₃ are punching centers (punching positions) T at positions on a straight line connecting the punches P, Q, R of the upper turret 17 and the turret shafts 43, 29, When the punches P, Q, and R are driven by the striker 39, the lower die P
₁ ~P _3, Q ₁ is to Q ₃ or fit implantation in any of such R ₁ to R ₃ together.

Opposite to the outer periphery of the lower turret 19, a shot pin cylinder 51 which is actuated by the drive chain 47 at a fixed timing phase is provided at an appropriate position. Upon receiving the engagement by the shot pin, the lower turret 19 is controlled to stop turning at a predetermined position.

In FIG. 4, a plate thickness sensor 53 for detecting a plate thickness is provided, for example, on the work clamp 15, and detects the thickness of the work W by the clamping thickness when the work clamp 15 clamps the work W. Then, the data is input to the numerical controller 21. The work clamp 15 clamps the work W from the upper and lower surfaces by a lower receiving piece 55 and an upper pressing piece 57.
, And the holding piece 57 is rotatably provided on the receiving piece 55 by a clamp shaft 59.

At the base of the holding piece 57, a clamp cylinder 61 is provided by hydraulic expansion and contraction.
7 is configured to be pinched and rotated about the clamp shaft 59 as a fulcrum. Due to the extension of the clamp cylinder 61, the tip of the holding piece 57 pivotally approaches the upper surface of the lower receiving piece 55, and clamps the workpiece W supplied between the receiving piece 55 and the holding piece 57. In addition, it is configured to operate in the opposite manner to hold and release.

The plate thickness sensor 53 is provided as a stroke sensor on the clamp cylinder 61, detects the clamp thickness of the clamp cylinder 61 when the work clamp 15 clamps the work W, and inputs the thickness as a plate thickness detection. Send. Reference numeral 63 denotes a stopper for determining a holding position of the work W in the Y-axis direction.

[0024] In FIG. 1, 65 denotes a signal line of the servomotor M _1, 67 is its power line. 69 denotes a signal line of the servomotor M _2, 71 is its power line. Reference numeral 73 denotes a signal line of the plate thickness sensor 53. Each of these signal lines 65,
69, 73 and power lines 67, 71, etc.
1 is connected to control input or output.

Although the thickness sensor 53 detects the thickness, a preset thickness may be input to the numerical controller 21.
The material of the work W may be directly input to the numerical controller 21 by a mode selection switch or the like.
When only the thickness is detected, in addition to the thickness sensor 53 of FIG. 4, an optical material sensor is provided for simultaneously discriminating the material of the work W clamped by the work clamp 15, for example, a steel plate or an aluminum plate. The numerical controller 21 may be input controlled.

The work W is carried in and supplied to the work tables 11 and 13 and is clamped by the work clamp 15. The lower turret at the punching position is controlled by the numerical control device 21 such as the carriage base 25 and the carriage 27. Feed between 19 and upper turret 17. The numerical controller 21 includes a combination of dies P _{1 to} P ₃ , Q _{1 to} Q ₃ , R _{1 to} R _3, etc. having different press clearances for the punches P, Q, and R depending on the material and the thickness of the work W. Is programmed.

For this reason, a material input to the numerical controller 21 and, for example, the thickness sensor 5 at the time of clamping by the work clamp 15 are used.
When there is a thickness input from _{No. 3} , the dies P _{1 to} P ₃ and Q _{1 to} Q with the optimum clearance for the set punch P, Q or R
₃ , _one of R _{1 to} R ₃ is selectively controlled.

[0028] The selected example punch P is being indexed to a punching center T by the turning of the upper turret 17 by the servo motor M _1, shot pin cylinder 4
Positioned at 1. At the same time, for example, the selected die P ₁ is indexed to the punching center T by the rotation of the lower turret 19 by the servo motor M ₂ ,
It is positioned by the shot pin cylinder 51.

The punch P positioned on the punching center T in this manner is pressed by the striker 39 to strike the punch P, and the work W is held at a predetermined position between the punch P and the die P ₁ of the lower turret 19. Stamped into the shape of

The punches P, Q, and R have different shapes, but the shapes may have the same size (diameter) that is significantly different. The dies P _{1 to} P ₃ are in the range of the clearance according to the plate thickness, and have the same shape as the punch P. Die Q
_{1 to} Q ₃ are selected for the punch Q and the die R
_{1 to} R ₃ are selected for the punch R.

[0031]

As will be understood from the above description, according to the first aspect of the present invention, when the die is replaced, the upper turret is not obstructed and the die is replaced. Can be easily performed.

According to the second aspect of the present invention, when the punch and the die have directionality, the punch and the turret are mounted on the upper and lower turrets in the same direction in the radial direction. The punch and the die are aligned at the position, and the punch and the die can be easily mounted on the upper and lower turrets.

[Brief description of the drawings]

FIG. 1 is a front view of a turret punch press.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged plan view of an upper turret and a lower turret of a portion viewed from an arrow III in FIG. 2;

FIG. 4 is a side view of a clamp part viewed from an arrow IV in FIG. 2;

[Explanation of symbols]

1 ... turret punch press 15 ... work clamp 17 ... upper turret 19 ... lower turret 21 ... numerical control device 29 ... turret shaft 39 ... striker 43 ... turret shaft 53 ... plate thickness sensor M ₁ ... servomotor M ₂ ... servomotor P, Q, R ... punch _{P 1 ~P 3, Q 1 ~Q} 3, R 1 ~R 3 ... die T ... punching center

Claims (2)

(57) [Claims] An upper turret (1) having a plurality of punches.
7) is rotatably provided, a lower turret (19) having a plurality of dies corresponding to the respective upper punches is rotatably provided, and a work (W) is formed with respect to the punching position (T) by the punch and the die. ) in the turret punch press provided with a moving positioning freely work clamp (15) the diameter smaller form than the diameter of the lower turret (19) the pre-SL upper turret (17), said lower turret (1
Do Ri, above the open configuration the upper part of the upper surface of 9)
Open the upper part of the lower turret (19)
With the punching position (T) in between, the work clamp
A turret punch press provided on the opposite side of (15) . 2. A turret punch press according to claim 1.
Turret shaft (29) of the upper turret (17)
A lower turret axis of the turret (19) (43), punching position (T) work clamp (15) Yes with offset in the Y-axis direction toward and away from the, and the punching pressure
With the working position (T) in between, the upper and lower turret shafts (29, 4
3) is arranged on the opposite side of the work clamp (15)
Turret punch press, characterized in that there.