JPH0542330A - Punching machining method - Google Patents

Abstract

PURPOSE:To provide an efficient punching machining method by which non-burr punching is carried out even by using a conventional punching press, the deterioration of working environment is prevented, the manual work required for deburring is eliminated and a punched material is transferred for a succeeding process immediately after the punching is performed. CONSTITUTION:The machining of a groove part is applied to at least the back of a work W which is preliminarily punched by a metallic die and the punching machining is performed on the groove part 47 by the cooperative working of a punch 11 and a die 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching method for punching using a die.

[0002]

2. Description of the Related Art Conventionally, in order to punch a work using a turret punch press or the like, a lower die (die) is applied to one surface of the work and an upper die (punch) corresponding to the lower die is used. ) Was applied to the other surface of the work, and a predetermined punching process was performed by hitting with a striker from the upper mold side.

In this method, since there is a gap between the punch and the die, burrs are often generated on the side of the punching portion where the die is applied.

When this burr is generated, not only the quality of the product is deteriorated, but also many injuries are caused during the work, and it is necessary to carry out the deburring work with the file. In addition, there is a drawback that a large deburring or the like is grinded by a deburring machine and the post-processing work time is not only consumed, but also the work environment is impaired due to the generation of dust and the like.

Therefore, using a punch blade having a wedge-shaped projection at the tip of the punch, the V-groove-shaped primary processing is performed on the contour of the workpiece to be punched beforehand, and the V-shaped processing is performed at the time of the secondary processing. Proposals have been made to prevent the formation of burrs by punching from the groove (Actual No. 47-1).
1488).

[0006]

However, in the punching method according to the above-mentioned proposal, since the V-groove is formed by the punch blade in the primary working, the work is plastically deformed and the work is warped, and Not only the accuracy at the time of the next processing is impaired, but also the yield is deteriorated.

The present invention has been made in view of the above circumstances. An object of the present invention is to eliminate the deburring work by deteriorating the working environment, and eliminating the manual deburring work. It is intended to provide a punching method that can be performed.

[0008]

In order to achieve the above object, in the punching method of the present invention, at least the back surface of a work to be punched by a die is preliminarily grooved and the formed groove portion is used as a punch. It is characterized in that punching is performed in cooperation with a die.

[0009]

According to the punching method having the above-described structure, the groove is formed by machining on at least the back surface of the work in advance in the portion corresponding to the size and shape of the die to be punched,
Set this groove and die together on a punch press,
Since the punch is pressed against the work to strike it, burrs are eliminated. In particular, when forming the groove portion by machining, the precision of the groove position can be accurately arranged on the die by processing with a multifunction machine having a groove processing function.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 8 shows a turret punch press as an example of the punch press used in this embodiment. The turret punch press 1 is composed of a C-shaped frame 5 having a pocket portion 3, a fixed table 7 for supporting a plate-shaped workpiece W (hereinafter referred to as a work W), a work positioning device 9 for positioning the work W, and a punch. A turret device 19 including a disc-shaped upper turret 13 provided with 11 and a disc-shaped lower turret 17 provided with a die 15 is provided.

The fixed table 7 is the lower turret 1
The upper surface of the C-shaped frame 5 and the upper surface of the C-shaped frame 5 are arranged on substantially the same horizontal plane. The work positioning device 9 has a moving table 33 movably supported in the left-right direction via a guide rail 31 installed on the lower frame 29, and a front-back direction via a rail 35 installed on the moving table 33. The carriage 37 is movably supported on the carriage 37, and the work clamp device 39 is provided on the carriage 37. The work W gripped by the work clamp device 39 is positioned on the fixed table 7 in the front-rear and left-right directions. It is like this.

The turret device 19 is provided with the pocket portion 3
A disk-shaped upper turret 13 rotatably supported by an upper frame 41 located above the
It is composed of a disk-shaped lower turret 17 rotatably supported by a lower frame 29 located below the pocket portion 3 via a rotary shaft 45, and the upper turret 13 and the lower turret 17 are synchronized in the same direction. To be rotated. And
A plurality of punches 11 are supported near the outer circumference of the upper turret 13, and a plurality of dies 15 corresponding to the plurality of punches 11 are provided on the lower turret 17.

A striker 21 for striking the punch 11 of the upper turret 13 is provided at a position near the fixed table 7 of the turret device 19 and above the center position of the fixed table 7 in the width direction. 21
Is provided in the ram body 23, and is configured to move up and down by the elevation of the ram body 23 to strike the punch 11.

In the turret punch press 1 thus constructed, the work W carried on the fixed table 7 is set with its origin position aligned, gripped by the work clamp device 39, and positioned by the work positioning device 9. By moving, the predetermined punching position of the work W can be set on the die 15 of the lower turret 17. At a predetermined punching position of the set work W, a groove processing machine 55 described later
Since the groove portion 47 formed by the above is aligned and placed as shown in FIG.
By punching the punch head 25 of
Is guided by the punch guide 27 and vertically descends, and the tip body 49 of the punch 11 projects into the groove portion 47 of the work W. Due to this protrusion, the work W is, as shown in FIG.
A crack 51 is generated between the upper and lower groove portions, and the scrap 53 is inserted through the die 15 of the lower turret 17 and dropped downward as shown in FIG. In this way, the work W is punched, and the burr is not generated due to the cracks 51 generated between the upper and lower groove portions. In the work W of FIG. 1 used in the above description, the groove portion 47 provided at the punching position is described as the groove portion in the vertical direction, but it is sufficient that the groove portion is only on the lower side.

An example of a groove processing machine for processing the groove portion 47 on the work W is shown in FIGS. 4 and 5.
The grooving machine 55 is composed of a rectangular frame body frame 57 having a size sufficient to accommodate the work W, and is composed of upper, middle and lower three stages. Upper frame 57A and lower 5
A rack gear 59 is provided on the outer periphery of each of the 7C and 7C, and an X-axis guide 63 and a Y-axis guide 65 are provided so as to vertically intersect each other on corresponding sides. At both ends of the Y-axis guide 65, pinion gears 61 that mesh with the rack gear 59 and perform parallel movement are provided. And X of the lower frame 57C
A drive motor 67 is provided on each of the shaft guide 63 and the Y-axis guide 65, and a belt 71 is stretched between the X-axis guide 63 and the Y-axis guide 65 of the upper frame 57A via a pulley 69. Therefore, the drive motor 67
Rotation of upper frame 57A and lower frame 57C
The X-axis guide 63 and the Y-axis guide 65 are configured to always move in parallel on the respective frames.

Such an X-axis guide 63 and a Y-axis guide 6
A machining head 73 is movably provided at a position where 5 and 5 intersect with each other. When the X-axis guide 63 moves, the machining head 73 is pulled by the X-axis guide 63.
It is configured to slide along the axis guide 65 and slide along the X axis guide 63 when the Y axis guide 65 moves. A groove cutting tool 75 is provided at the center of such a processing head 73 so as to be vertically movable.
Is always provided at the intersection of the X-axis guide 63 and the Y-axis guide 65.

The middle frame 57B has the same shape as the upper frame 57A and the lower frame 57C, and a plurality of clamps 77 fixed to the frame are provided on two adjacent sides. Adjacent sides have clamp holding members 79 and 81 movably mounted along a guide groove 85 provided in the middle frame. These clamp holding members 79 and 81 are moved in parallel to the frame of the middle frame 57B corresponding to each other, and a clamp 83 corresponding to the clamp 77 is provided on the inner surface thereof, and the work W is The clamps 77 and 83 are designed to be held horizontally.

The upper and lower surfaces of the work W gripped in the horizontal direction are in contact with the grooved binder 75 of the machining head 73 provided on the upper frame 57A and the lower frame 57C which move at the same position and in the same position, Grooving is performed by the operation of the driving motor 67 for the X-axis guide 63 and the Y-axis guide 65.

6 and 7 are detailed views of the processing section 73. The processing unit main body 87 is a regular four-column body, and the Y-axis guide 65
Has a nut portion 89 of a ball screw that engages with, and has a nut portion 89 of a ball screw that is provided on the lower side of the nut portion 89 so as to intersect at a right angle and that engages with the X-axis guide 63. Is provided with a cylinder 91, and a piston 93 is provided in the cylinder 91 so as to be vertically movable. The spline gear 9 is attached to the rod of this piston 93.
5 is provided, and is engaged with the inner peripheral surface of the housing 97 provided on the outer periphery thereof. The lower part of the housing 97 meshes with the spline gear 95, and the groove cutting tool 7 is projected and retracted from the lower end of the housing 97 as the piston 93 moves.
5 is attached. A flange-shaped circular flange is formed on the upper end of the housing 97, and a gear 99 is provided on the outer circumference thereof. This gear 99 has a small gear 1
It is connected to the groove cutting tool rotating motor 103 via 01. Therefore, this groove cutting tool rotating motor 103
Is driven, the housing 97 is driven through the pinion gear 101.
Is rotated to change the cutting direction of the groove-cutting binder 75.

Processing part main body 8 provided with this groove cutting binder 75
A work retainer 105 for retaining the work W is provided around the lower end surface of 7. The work retainer 105 is a member having a convex cross section, and a plurality of free bears 107 are provided on the lower end surface thereof. The protrusion on the upper surface forms a guide bar 109 for the work retainer 105, and the guide bar 109 is surrounded by A spring 111 is provided and is embedded in the processing portion main body 87 together with the spring 111. A plurality of such work retainers 105 are provided on the lower end surface of the processing portion main body 87, and the work W is completely pressed and fixed by this.

Such a machining head 73 is also provided on the lower frame 57C so that the grooved binders 75 correspond to each other, and the work W is sandwiched by the work retainers 105 of the machining heads 73 provided above and below this. The grooves 47 having the same shape are formed on the upper surface and the lower surface by the grooved binder 75.

Although the groove 47 is shown as a V-groove in the above-mentioned embodiment, the groove cutting tool 75 is inclined on one side, so that the inclined groove 113 as shown in FIG. 9 is formed.
Can also be formed. By using this one-sided inclined groove portion 113, the crack 51 at the time of shearing by the punch 11 enters the vertical direction as shown in FIG. 10, and the finished surface after processing becomes in a better state as shown in FIG.

As described above, the punching method of the present invention can be applied to any plate material processing machine such as a turret punch press or a punch press, and a compound machine with a groove processing device has a feature that accuracy can be easily obtained. Also, using a punch press with a groove processing device, for example, to make a round hole by groove processing with a die, if the groove parts are processed on the front and back sides of the plate material with groove cutting tools on both sides of the punch and die, Easy burr-free processing. In particular, according to the punching method of the present invention, since the punching is not performed by the cutting edge of the die, the die can sufficiently achieve the purpose as long as it has a smaller hole diameter.

The present invention is not limited to the above-described embodiments, but can be applied to other embodiments by making appropriate changes.

[0026]

As described above, according to the present invention,
Since the configuration is as achieved in the claims,
Even if a conventional punch press is used, burr-free processing can be performed, the work environment is prevented from deteriorating, labor-intensive work is eliminated, and the punched product can be immediately sent to the subsequent process, improving the efficiency of sheet metal work. It will be possible. Further, the punching method of the present invention has many advantages such as labor saving of plate material processing and work without using a high-pressure punch press.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part in an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view during punching of FIG.

FIG. 3 is an enlarged cross-sectional view after punching of FIG.

FIG. 4 is a front view of a groove processing machine for forming a groove on the work of FIG.

5 is a plan view of the groove processing machine of FIG. 4. FIG.

6 is an enlarged cross-sectional view of a processing portion of the groove processing machine of FIG.

7 is an enlarged cross-sectional view showing a side surface of the processed portion of FIG.

FIG. 8 is a side view of the turret punch press of FIG.

FIG. 9 is an enlarged sectional view of a main part in another embodiment of the present invention.

10 is an enlarged cross-sectional view during punching of FIG.

11 is an enlarged cross-sectional view after punching of FIG.

[Explanation of symbols]

 1 Turret Punch Press 11 Punch 13 Upper Turret 15 Die 17 Lower Turret 25 Punch Head 27 Punch Guide 47 Groove

Claims (1)

[Claims] 1. A punching method, wherein at least a back surface of a work to be punched by a die is grooved in advance, and the groove portion thus formed is punched by cooperation of a punch and a die.